Reading prompt from stdin...
OpenAI Codex v0.161.0
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workdir: /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
model: gpt-6-astra
provider: openai
approval: never
sandbox: danger-full-access
reasoning effort: medium
reasoning summaries: none
session id: 01a12bc3-0d19-71a2-9a8c-b2855e4726a8
--------
user
Build World War I German A7V style heavy tank: a tall riveted steel box on low tracks, sloped plates at the front and rear, a 57 mm gun in the nose, three machine gun ports along each side and two at the rear, a square raised commander cab with flaps on the roof centre, side access doors, exhaust pipes along the lower sides (the one on sheet.jpg) as a production, REALISTIC 3D game asset in Blender, for Forge's asset library. Look at the reference
images in this directory with your image tool first: sheet.jpg. It must look like a real object from a modern
third-person game up close: never blocky, never toy-like, never flat colours.

Blender 5.2 is headless on another machine. Write bpy scripts here and run them with:
  ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/<script>.py
(first `ssh gex44 mkdir -p /root/fal-author/a7v-tank-v1`, scp scripts and any textures to gex44:/root/fal-author/a7v-tank-v1/, scp renders back here, then
LOOK at them with your image tool). Iterate until the renders match the references: silhouette, proportions, every
named part, materials. Only one Blender job on the GPU box at a time from you.

Quality bar:
- Real dimensions in metres: 7.34 m long, 3.07 m wide, 3.30 m high.
- Construction detail as geometry where it shapes the silhouette or catches light: bevelled edges everywhere (no razor
  box edges), real thickness, frames around openings, trims, rails, fittings, bolts, ropes, cables, small parts. No
  z-fighting, no gaps, nothing floating, smooth shading on round parts.
- Photographic materials: use CC0 Poly Haven textures (download 1k or 2k jpg maps from https://dl.polyhaven.org/file/
  ph-assets/Textures/jpg/<res>/<id>/<id>_<map>_<res>.jpg, maps diff, nor_gl, arm; pick ids by browsing
  https://api.polyhaven.com/assets?t=textures) mixed with node detail (rust streaks, grime, moss, edge wear, salt), then
  BAKE each material's result with Cycles to image textures (base colour, normal, ORM) so it survives glTF export.
  List every Poly Haven id you used in NOTES.md (licence evidence). No other image sources.
- Budget: 80k to 140k triangles, at most 10 materials, texture images at most 2048 px, GLB at most 12 MB.

Export contract (glTF binary .glb, Y up, metres): Gun forward toward +Z, up = +Y, +X = the tank's LEFT side, centred on X = 0; origin (0,0,0) on the ground plane at the centre of the hull footprint. Tracks touch y = 0. Turret straight ahead, gun level. Apply transforms and modifiers. No cameras, lights or
helpers in the GLB. GAME WEIGHT overrides the budget above: every texture image at most 1024 px, ORM / occlusion maps at most 512 px; share baked texture sets between parts and use tiling materials + trim textures on big surfaces. RIG. Separate named mesh nodes: Hull (everything fixed to the hull), NO turret on this type: Gun (the nose 57 mm gun with its mount, origin at its pivot, turns about Y by 25 degrees each way and elevates about X), child Barrel (origin on the bore axis at the mount: recoil), empty Muzzle at the tip (child of Barrel); MG_1..MG_6 for the six machine guns in the sides and rear (origin at the pivot), Track_L, Track_R (the track belts: their texture V coordinate runs ALONG the track, once round the loop, so a game scrolls or deforms it to animate; links modelled as geometry), every road wheel, sprocket, idler and return roller as its own node Wheel_L1..Wheel_Ln and Wheel_R1..Wheel_Rn (front to back, origin at its hub, spin about X). Crew hatches as their own nodes, origin on the hinge line, closed: Hatch_Commander, Hatch_Driver and Hatch_Loader where the type has them, with a dark crew space modelled just under each so an open hatch shows depth, not a hole to nowhere. Empty nodes (no mesh): Seat_Commander (head-out hatch point), Seat_Driver, Exhaust, Light_Head_L, Light_Head_R, Fx_Engine (centre of the engine deck: where a game puts fire and smoke), Fx_Ammo (inside the hull where the ammunition burns), Fx_Hatch (top of the commander hatch: flame jet). Lamps: material "Lamps". PAINT CONTRACT (how games get variants of one model): the main paint lives in ONE material named exactly "Paint". Its base colour TEXTURE holds only light neutral detail (near white, with grey grime, mud, dust, soot, rain streaks, panel lines, chipped edges baked in) and its baseColorFactor holds the paint colour; default factor = [0.19, 0.22, 0.19] (field grey). A game changes that factor, so nothing else (rubber, metal, tracks, glass, lamps, weapons, interior) may use Paint. Matte military paint: no clearcoat. In nodes.json add "paints": six real paints for this model as linear RGB triples with names, the default first, chosen from: olive drab, NATO green, desert tan, field grey, winter white, dark green-black, sand, forest green, dark yellow, panzer grey, khaki brown; and render paints.png: a 3x2 grid of the same 3/4 view in those six paints (EEVEE or low-sample Cycles) to prove the recolour works. DESTRUCTIBLE TANK (library contract tank-damage/v1). Games show this tank healthy, hit, stripped of its panels, immobilised, gun knocked out, and as a burnt wreck, only by showing and hiding named nodes. So deliver TWO GLBs in the same frame, origin and scale. FILE A, a7v-tank.glb = the healthy tank with the rig above. In it every bolt-on item is its OWN mesh node named Part_<Name>, never merged into Hull or Turret, with its origin at its own centre (a game hides it, or throws it as debris): side skirt / armour plates one node per plate (Part_Skirt_L1.. front to back, Part_Skirt_R1..), fenders and mudguards (Part_Fender_FL, _FR, _RL, _RR), stowage boxes, tool sets, fuel drums or jerrycans, exhaust mufflers and shrouds, engine deck grilles, lamp guards, spare track links, tow cable, unditching beam, antennas, smoke launchers; turret items are children of Turret (Part_Turret_<Name>: bins, bustle rack, cupola ring, sights, extra plates). Use what this type really carries: at least 14 Part_ nodes, spread over all four sides and the turret, big enough that removing them clearly changes the silhouette. UNDER every Part the Hull / Turret surface is complete and detailed (mounting brackets, bolt bosses, weld seams, unfaded paint patch; behind skirts the return rollers and upper track run): hiding a Part must never show a hole, a missing face or empty space. FILE B, a7v-tank-damage.glb = ONLY the damage pieces (a game keeps them hidden until needed). Exactly four top-level nodes: (1) Hull_Damage, an empty at the origin, with children: Dmg_<Name> for at least 8 of the hull Parts (the SAME part in place but battle-damaged: bent, torn open, shot through with curled edges, half hanging, scorched; same origin as its Part, so a game swaps Part_X for Dmg_X); Scar_Hull_Front, Scar_Hull_L, Scar_Hull_R, Scar_Hull_Rear (hit marks for that armour face: 3 to 5 impacts each, real geometry hugging the armour 2 to 4 mm proud, no z-fighting: gouges of bright bare steel, ricochet furrows, one penetration hole with a petalled raised rim and a black inside, a soot fan around them); Track_L_Broken and Track_R_Broken (that track thrown: snapped at the front, the upper run fallen off the wheels, the loose end lying flat on the ground at y = 0 ahead of or behind the tank; a game shows it instead of Track_L / Track_R). (2) Turret_Damage, an empty exactly at the Turret origin, with children: Dmg_Turret_<Name> twins (at least 3), Scar_Turret_Front, Scar_Turret_L, Scar_Turret_R, Scar_Turret_Rear, and Gun_Broken (origin exactly at the Gun origin: the mantlet with the barrel burst and peeled open at mid length, or bent down; shown instead of Gun). (3) Wreck_Hull, at the origin: the whole hull knocked out and burnt out as ONE mesh, wheels and tracks included: paint burnt off to grey scale, rust and soot (material "Burnt", never Paint), engine deck ruptured upward, hatches blown open, several plates missing or hanging, rubber burnt off the road wheels, suspension sagged about 5 cm, tracks slack and one broken; the open turret ring well is modelled, with a dark burnt interior. (4) Wreck_Turret, origin exactly at the Turret origin (a game leaves it in place, sets it askew, or blows it off beside the hull): the burnt turret with its gun drooped to full depression and hatches open; its underside is closed, with the turret ring and basket stub modelled, because it may lie upside down. Build the damage from copies of your healthy meshes (deform, cut, boolean, decimate) so everything lines up. Budget of file B: at most 110k triangles (the wreck about 40 percent of the healthy count); materials Paint (same texture and factor as file A: the recolour must follow), Burnt, Scars (bare steel and soot), TrackSteel, Rubber; its textures at most 512 px except Paint. PROOF: render states.png, a 3x2 grid of the same 3/4 front view, built by importing BOTH exported GLBs into an empty scene: 1 healthy; 2 hit (every Scar_ node shown, six Parts swapped for their Dmg_ twins); 3 stripped (every Part_ hidden, no twins: the bare tank must still look finished); 4 immobilised (Track_L_Broken instead of Track_L, Gun_Broken instead of Gun); 5 wreck (only Wreck_Hull + Wreck_Turret); 6 wreck with Wreck_Turret blown off, lying beside the hull. LOOK at it with your image tool and fix what reads badly. In nodes.json add "damage": {"parts": [{"part", "twin" or null}], "scars": [...], "broken": {...}, "wreck": [...]} and list the nodes of both files. This type has no turret: its turret-side damage pieces hang under a top-level empty named Turret_Damage placed at the origin, and they are for the ROOF CAB: Scar_Turret_Front / _L / _R / _Rear = hits on the four sides of the commander cab; Gun_Broken replaces Gun. There is no Wreck_Turret: Wreck_Hull is the whole burnt tank with the roof cab blown open. The cab flaps, side doors, tow shackles, exhausts, lower side armour skirts over the running gear and roof grilles are good Part_ nodes. No national insignia, crosses, stars, roundels, flags, unit badges, serial numbers or any text: games give these to their own factions. No manufacturer logos. MOVING PARTS: never apply transforms to a moving node: each turret, gun, barrel, wheel and hatch keeps its object origin ON its own pivot (turret ring axis, gun trunnion, bore axis, wheel centre, hinge line). Check it in Blender before export: rotate each moving node 30 degrees in a test render; nothing may leave its place. Keep this directory clean: put any helper tools you install (node_modules, vendored three.js, browser checks) under /tmp, never here. Pace: deliver a first complete healthy GLB within about 30 minutes, the damage file by about 60 minutes, then use what is left of about 75 minutes to improve what the renders show is weakest. Use Cycles with the GPU (OptiX/CUDA) and modest samples for bakes and renders. 
Deliver in this directory: a7v-tank.glb; build_a7v-tank.py (ONE script that builds the whole asset from an empty scene,
downloads/loads its textures, bakes and exports: the GLB you deliver must come from a clean run of it); final.png
(1920x1080 Cycles render, 3/4 front view, soft daylight); side.png (orthographic side); clay.png (same view as final,
plain grey material); nodes.json (every node name with world position + overall bounding box); NOTES.md (6 lines:
what you made, triangle count, materials, texture sizes, Poly Haven ids, what still differs from the references).
Stop when you judge it matches the references and would not look out of place in a modern realistic game.

warning: `--dangerously-bypass-hook-trust` is enabled. Enabled hooks may run without review for this invocation.
warning: `--dangerously-bypass-hook-trust` is enabled. Enabled hooks may run without review for this invocation.
codex
I’ll inspect the reference and the Blender asset workflow, then build and render the healthy tank before adding its damage states.

hook: PreToolUse
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse Completed
hook: PreToolUse Completed
hook: PreToolUse Completed
hook: PreToolUse Completed
exec
/bin/bash -lc 'cat /home/claude-agent/AGENTS.md' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
<!-- GENERATED from CLAUDE.md by forge-hub/hub/gen_agents_md.py — do not edit by hand. -->
<!-- Re-run: python3 /home/claude-agent/forge-hub/hub/gen_agents_md.py -->

# Forge: AI-Powered App Factory
Single-tenant server (16GB ARM64 Hetzner), runs alongside Detecteev (forensics platform).

## Navigation
- **Forge app**: `/home/forge/app/` (Python, DBOS workflows)
- **Forge UI**: `/home/forge/ui/` (React + FastAPI, port 8765)
- **Detecteev**: `/home/claude-agent/detecteev/` (Next.js + FastAPI)
- **Project sandboxes**: `/home/forge/data/projects/{slug}/sandbox/`
- **Skills**: `/home/forge/app/skills/` (reasoning + stack-specific)
- **Deployed apps**: `/home/forge/deploys/{slug}/`
- **Specs & plans**: `/home/claude-agent/forge-build/`

## Architecture at a Glance
- **Pipeline**: intake → ideation → research → challenge → business → prd → feature-spec → stack-selection → blueprint → scaffolding → feature-build → dx-audit → product-review
- **Native Claude CLI calls use `--model sonnet`**. Provider adapters explicitly select their own API model; DeepSeek uses `deepseek-flash[1m]` through Claude Code.
- **Autonomy**: all stages auto by default, no human gates
- **Deploy**: Docker containers at `{slug}.forge.le-borgne.fr` via Traefik
- **Feedback loop**: report issue → AI drafts fix → user approves → auto-redeploy

> ⚠️ The pipeline above is the **legacy Personal Forge** (forge.le-borgne.fr). The live product is **Forge Corp** — multi-box, multi-tenant. Read the next section for current topology.

## Forge Corp topology & deploy architecture (CURRENT — read this)

**Boxes & roles** (each box has its OWN `/home/claude-agent`, memory store, and CLAUDE.md — they do NOT share):
- **local** `204.168.129.84` — orchestrator. Opus planning, this memory store, the `coord` bus. No app/infra runs here.
- **ax42** `5.9.32.176` (`ssh root@5.9.32.176`) — Corp **Engine** (the build+deploy pipeline `deploy_sandbox`) + Postgres **primaries**. Canonical Engine source: `/home/claude-agent/forge-monorepo/apps/forge-engine/` (module `forge_engine`).
- **box1** `136.243.170.223` (`ssh box1`) — Corp **app-runner**: deployed tenant apps (zero/friends/recommerce) run here + PG **standbys**.
- **gex44** `5.9.10.114` (`ssh root@5.9.10.114`) — **Factory** (auth/Google-OAuth proxy + tenant UI) + inference (Flux/3d/LiteLLM) + **Caddy edge**. Canonical Factory source: `/home/claude-agent/forge-monorepo/apps/forge-corp-factory/`.
- **prod** `46.224.168.31` (`ssh prod`) — **Tower** (operator control plane) + dashboard; also legacy Personal Forge + Detecteev.

**Canonical source = the live HOST trees, NOT git.** The Engine is image-baked (no bind-mount): deploy = `docker build` from the ax42 host source; Factory builds from the gex44 host source. The GitHub repo `T1misageek/forge-monorepo` is a periodic **snapshot/backup**, NOT the build source. NEVER treat git as source of truth. Before any Engine/Factory rebuild, reconcile **host ← live container** (a single-file rsync from the mirror silently drops live state). httpx is in the Engine container, not host Python.

**Engine runs blue/green since 2026-09-02 13:11 UTC.** nginx `forge-engine-front` owns host `:8000` + docker alias `forge-engine`; Engine instances are `forge-engine-<ts>` (no host port). There is NO container named `forge-engine` any more: use `docker exec $(engine-live) …`, `docker logs $(engine-live)`. Deploy = `engine-deploy` (= `deploy.ax42.sh`: build → start new instance → `engine-switch` nginx reload → drain old, **no idle gate, nothing killed**); `engine-rollback` flips back (refuses a stopped previous); `engine-restart` no-arg = `engine-deploy --no-build`. **Builds AND refine turns survive an instance death** (P1 09-02 + P2 09-03): a 15 s sweep adopts orphaned runs (`pipeline/adopt.py`) and refine turns (`refine/adopt.py`: `metadata.active_turn`, `claude --resume` of the shared transcript store `~/.claude-engine`), proven by hard-kill on pausetest tenants. Never kill an instance without reading `/admin/inflight` first. **P3 (09-03)**: brief submits are idempotent (`X-Forge-Idempotency-Key` = Factory brief id → `runs.idempotency_key`, replay = 200 + `x-forge-idempotent-replay: 1`); the Factory retries only when Engine `/health` advertises `capabilities.idempotent_submit`; the reconciler re-polls `failed` runs < 6 h. `/admin/instance`, `/admin/inflight`, `POST /admin/drain` (consumer Bearer key). Detail: memory `project_engine_zero_downtime_deploys.md`.

**Deploy pipeline `deploy_sandbox`** (`forge_engine/deploy/__init__.py`, synchronous): Step 0 Dockerfile/.env → 0b telemetry route → 0c connectors → 0d cache → 1 build → 1b transport to box1 → 2 run (reaps prev container immediately, so **no `-prev` rollback exists** by later steps) → 3 inspect IP → 4 DNS → 5 traefik → **6 authed-smoke gate**.

**Step 6 — deploy-time authed-smoke gate (`forge_engine/deploy/smoke.py`)**: after cutover, mints a REAL synthetic session and GETs the app's post-login routes (pages referencing `requireUser`/`getCurrentUser`). Catches the "builds + homepage-200 but 500s after Google login" class (e.g. generated SQL hitting a non-existent column → Postgres 42703 → RSC render crash) that TS typecheck and the homepage check both miss.
- ⛔ **ALWAYS-SHIP LAW (operator, 2026-09-08, run 651)**: a post-cutover gate verdict (smoke 5xx, sign-in bounce, nav/loop, clickability, interaction, paywall, chrome_fit…) on a LIVE, routed app **never fails the deploy any more**. `forge_engine/deploy/ship_policy.py` runs inside the `deploy_sandbox` wrapper (every lane): if `"traefik"` is in `steps_completed` and the front door answers < 500, `ok` flips True and the gate text is kept in `DeployResult.shipped_with_findings`, the corp-deploy `gate_report`, and `runs.meta.shipped_with_findings` (ERROR log `SHIPPED WITH FINDINGS`). Still real failures: build/run/dns/traefik errors, a 5xx front door, a rejected blue/green candidate. Kill switch `FORGE_ALWAYS_SHIP=0`. Memory `feedback_always_ship_live_builds.md`.
- Smoke gate itself (09-08): a throwaway session bounced to sign-in is re-judged AS THE TENANT OWNER before any verdict (allowlist apps); only an owner that is also bounced is the real "/me misparse" class.
- Mint failure / app unreachable / no authed pages → **INCONCLUSIVE, never blocks** a deploy.
- **Mint path**: Engine can't reach the Factory DB, so it POSTs `https://forge.{tenant}.ohmyunicorn.com/api/auth/oauth/google/_smoke` (in `forge_corp/api/routes/oauth_google.py`) guarded by header `x-forge-smoke-secret` (wrong/unset → 404). Shared secret in `/home/claude-agent/.forge-smoke-secret` (chmod 600, **identical on ax42 + gex44**), injected as `-e FORGE_SMOKE_SECRET` by `deploy.ax42.sh` (Engine) and `deploy.sh` (Factory). Absent secret ⇒ /_smoke stays 404 ⇒ smoke INCONCLUSIVE (never blocks).
- **Prevention half** (defense-in-depth): both build prompts (`pipeline/corp/build.py` + `pipeline/fast/fast_build.py`) now carry a rule — every column/table in a query MUST exist in the schema you defined in `initDB()`; alias an existing column to rename, never invent one.
- Detail in memory: `reference_authed_smoke_gate.md`, `reference_authed_page_sql_column_gap.md`.

## Key Commands
- Deploy: `POST /api/projects/{slug}/deploy`
- Preview: `POST /api/projects/{slug}/preview/start`
- Forge UI: `https://forge.le-borgne.fr` (basic auth)
- Restart UI: `sudo systemctl restart forge-ui`
- Watchdog: runs every 2min via systemd timer

## Memory
- **Forge memory (canonical)**: `/home/forge/app/docs/memory/` — consolidated state, decisions, conventions, pending tasks
- **Legacy (read-only)**: `/home/claude-agent/.claude/projects/-home/memory/` — kept for reference, no longer updated

## Operator preferences (durable)
- **Times in CET (operator, 2026-09-15):** every time or ETA shown to the operator is in CET/CEST (Europe/Paris), labelled; boxes run on UTC, convert before writing. Applies to worker briefs and published docs too.
- **Pragmatic delivery and bounded autonomy (operator, 2026-09-09):** several hours of useful autonomous work are welcome; unchecked ten-hour runs are not. Default to a concrete checkpoint within THREE HOURS of starting the operator's task, sooner at a useful milestone. Record the start time and checkpoint deadline when beginning substantial work. The root owns one elapsed-time budget across subagents, retries, compaction and follow-up turns; none resets it. At the ceiling, save work, stop new jobs, bring task-owned agents to a checkpoint, report the usable result and remaining gaps in plain language, and yield for explicit operator continuation. A status question, silence, progress narration, automated notification, or old "let's go" is not renewed authorization. The operator may explicitly set a different window.
- **Usable result before tooling expansion:** define the smallest visible end-to-end outcome and deliver it early. Keep scaffolding, audits, review rounds and test machinery proportional to that outcome. Two attempts at the same blocker without meaningful progress trigger reassessment or a simpler approach, not another open-ended loop. Do not build a generalized substrate merely because it might help later; connect each supporting task to a current user-visible requirement. Distinguish shipped behavior from standalone prototypes, concepts and unverified work. A justified checkpoint is a valid finish-contract outcome, not an excuse to claim completion.
- **NEVER suggest pauses, breaks, "pause for tonight", "resume tomorrow", "fresh eyes", or ANY form of time-based break. EVER.** This is the single most annoying behaviour for the operator. *Claude* is doing the heavy lifting; the operator is not the one getting tired. Time of day is irrelevant — push through, period. Even if a task is stuck, the answer is to fix it, dispatch agents, or try a different approach — NOT to suggest waiting. If a clean reinstall is the answer, just do it. The operator decides when to stop, not Claude.
- **Quality over cost** within the agreed scope and checkpoint window. Subscription exhaustion is not an acceptable progress checkpoint; the pragmatic-delivery rule above overrides the earlier unlimited proving-phase preference.
- **Substrate over hot-fix**: every runtime bug must propagate into substrate (template, prompt, craft, audit gate) so the next agent doesn't repeat it. Hot-fix-only is a half fix.
- **Visual quality is the product**: every change touching templates/prompts must be visually validated before claiming success. "It builds and deploys" ≠ "it looks right".
- **Delegation:** work locally by default. Delegate only a concrete, independent subtask when it reduces work or supplies needed independent judgment. Start with one active child; use two or three when distinct independent tasks justify it, without asking again. Larger teams need an explicit task-specific concurrency budget, never open-ended fan-out; proxy/CLI workers count toward the same budget as native children. No recursive delegation by default. All workers share the root checkpoint deadline. Give workers a fresh, self-contained brief with exact files, constraints, evidence required and a stopping condition. Full-history forks are exceptional, never a default.
- **Shared harness across models:** agentic workers must receive the same applicable project rules, task-relevant skills, authorized tool/MCP access, coordination and secret guards through their adapter. Load skills selectively, not all at once. Preserve isolation and task-specific permissions; equal harness support does not grant broader authority. Missing wiring is an adapter gap to report or fix, not a reason to declare a model incapable. Verify the chosen lane rather than assuming every helper inherits the full setup.
- **Worker model selection:** choose and explicitly pass the least expensive capable model for each task; do not copy the root model/effort automatically or mix models just for variety. Gemini 3.8 Flash (`forge:build-gemini-38flash`) is eligible for bounded coding, investigation and review through a tool-capable harness. Local builders use `forge-agent run --harness gemini --model forge:build-gemini-38flash --repo <repo> --purpose <task> --task <brief>` with a bounded `--timeout`; this runs Claude Code with copied shared skills/rules/hooks, Forge MCP and isolated proxy auth. Proven locally with actual Gemini responses, MCP skill/coord calls, file edits, tests and a blocked secret-guard probe. `--harness gemini-proxy` remains the single-shot no-tools helper for tasks that need no tools. The local Gemini builder currently rejects optional `--jail`; never imply that it ran in a container sandbox. Use `gpt-5.6-luna` for narrow mechanical work, `gpt-5.6-terra` for exploration and bounded implementation, `gpt-6.1-sol` (Sol) for demanding implementation/debugging/review, and `gpt-6-astra` for unusually difficult architecture or reasoning. **Sol = `gpt-6.1-sol` (operator, 2026-09-30):** every Sol request runs GPT-6.1 Sol (Codex CLI >= 0.159.2; 0.156 gets a 400). `sol`/`solx` call it, and the Engine swaps `gpt-6-sol` and `gpt-5.6-sol` for it at launch (`cli/sonnet_retire.py` LATEST_VERSION, also inside `run_tracked_codex_cli`). `gpt-6-luna` (Codex CLI >= 0.156.0) is the GPT-6 option for the Luna tier; not benchmarked yet, so `gpt-5.6-luna` stays the Luna default until a measured run shows it is worth its cost. Claude CLI workers use `--model sonnet`, which is **Sonnet 5.5 only** on this box (alias pinned in `~/.claude/settings.json` since 2026-09-28; never Sonnet 5; the Engine still remaps Sonnet to Opus 5.5). **Haiku 5.5 (2026-10-08):** `--model haiku` = `claude-haiku-5-5` everywhere (alias pinned in `~/.claude/settings.json`; the Engine seam upgrades `haiku`/`claude-haiku-4-5` at launch): $0.10 in / $0.50 out per MTok, 1M context, default effort medium. Use it for classification, extraction, routing, yes/no gates, judges and cheap subagents at effort low or medium; `haikux "prompt"` one-shot, `review --by haiku` for the cheapest second look (same family, not independent), panel seat `haiku-local`. Always pass `--effort`: low for mechanical edits, medium by default, high only for creative or hard work (and for benchmarks, the same effort as the run it is compared with). Native Codex defaults are Terra/medium; explicitly select low effort for straightforward tasks and high only where the reasoning warrants it. Prefer a different family for independent judgment when useful. Escalate after evidence of a capability limit instead of repeated cheap retries; name unavailable models and use a supported alternative. Codex mixed-model spawns use `fork_turns="none"` with a self-contained brief; full-history forks inherit the parent's model and effort.
- **Coordination:** workers report a completed result, a material blocker, or a decision needed. Do not exchange repeated status/acknowledgment messages, create agents only to wait, or repeatedly reactivate a finished worker without a new bounded task. Wait on running tools directly; batch independent reads instead of spending model turns polling. The root keeps useful local work and integrates the result.
- **Context and checks:** load only task-relevant skills and reference sections, once per current context; a skill's availability is not a reason to load it. Use scoped searches and bounded output; keep full logs in artifacts. Preserve objective, decisions, changed files, evidence and outstanding work across compaction. Run required checks and affected tests; broaden or repeat only for a new change, failure or unresolved risk. Stop when the requested outcome is evidenced.

## Talking to other models in the CLI (2026-09-17)

Three model CLIs, same shape, all with full tool access and no approval prompts
(safety = the PreToolUse secret + coordination guards, not a sandbox):

| command | model | one-shot | extra flags |
| --- | --- | --- | --- |
| `astra` | Codex GPT-6 Astra | `astrax` | Codex flags |
| `sol` | Codex GPT-6.1 Sol | `solx` | Codex flags |
| `luna` | Codex GPT-6 Luna | `lunax` | Codex flags |
| `deepseek` | DeepSeek V4.1 Flash | `deepseekx` | `--effort low|high|max` |
| `gemini` | Gemini 3.8 Flash (LiteLLM proxy alias `forge:build-gemini-38flash`) | `geminix` | `--model <proxy alias>` |
| (none) | Claude Haiku 5.5 (`claude-haiku-5-5`, via `claude-lean`) | `haikux` | Claude Code flags (`--effort low`, `--tools ""`) |

All four are executables in `~/bin`, not shell functions: `~/.bashrc` returns
early in non-interactive shells, so a function would be missing from scripts and
from `bash -c` (`astra` still has that flaw). `--ask-permissions` restores the
approval prompts. `deepseek` and `gemini` are Claude Code driving another
provider's endpoint, so every Claude Code flag passes through (`--continue`,
`--resume <id>`, `-p`).
Each has a persistent private profile (`~/.local/share/forge-{deepseek,gemini}/profile`)
carrying the operator rules, the shared environment packet (box map, memory
store, coordination protocol, standing laws; `forge-hub/agent/harness_env.py`),
a copy of `~/.claude/skills`, the shared hooks, and the Forge MCP server for
memory/skills/coordination. Docs: `forge-hub/agent/DEEPSEEK.md`, `GEMINI.md`.

Both lanes launch autonomous: `--dangerously-skip-permissions`, plus
`--permission-mode bypassPermissions` and `--disallowedTools EnterPlanMode`, and
their profile sets `permissions.defaultMode: bypassPermissions`. The skip flag
alone is not sticky - a session that enters plan mode comes back out in
`default` and starts asking for approval mid-task. `--ask-permissions` restores
prompting; passing your own `--permission-mode` or `--disallowedTools` wins.

Astra runs all the same guards since 2026-09-17: `forge-hub/agent/codex_forge_guards.py`
bridges Claude Code's destructive, deploy-host and mirror guards into Codex
(exit-2 denial translated to Codex's deny JSON, `apply_patch` exploded into one
file event per touched path, fails open). The guard scripts are not forked; the
Claude copies in `~/.claude/hooks/` stay the single implementation.
**No waiting parent (2026-09-20)**: `forge-hub/agent/codex_wait_guard.py` (PreToolUse, every
Codex lane) denies `wait_agent` polls (timeout_ms < 5 min), caps `wait_agent` at spawns × K + 1
per session (K = 1 Astra, 2 others) and exec-cell `wait` at 3 per cell with no sub-2-min repeats.
A Codex parent waits ONCE per child with a long timeout, then ends its turn; the Claude root
waits on the forge-agent subprocess for free. Kill switch `FORGE_WAIT_GUARD=0`, budget
`FORGE_WAIT_GUARD_K`. Denials log to `/tmp/codex_wait_guard.log`. Claude-lane twin
`~/.claude/hooks/wait_guard.py` (settings.json PreToolUse `Bash|TaskOutput|Read`, copied into the
DeepSeek and Gemini profiles at every launch): a bare `sleep N; <check>` turn outside a loop is
allowed twice per session then denied; `TaskOutput` / reads of a `tasks/<id>.output` file twice per
task then denied. Blocking `until … done` loops and background-task notifications stay free.

**Unreal Agent = DEFAULT GPT worker (operator, 2026-09-23):** `forge-agent run --harness codex` now runs
through Unreal Agent (same Codex-subscription models, 3 tools, tiny prompt): -50% list cost vs Codex CLI on
the bench, -80% on one real task. Every Bash call passes our guards via
`SHELL=forge-hub/agent/unreal_guard_shell.py`. No MCP, no resume yet. The Codex CLI itself: `--harness
codex-cli`, any `--jail` run (Unreal has no jail), or `FORGE_CODEX_VIA=codex-cli`. Unchanged: the
interactive `astra`/`sol`/`luna` CLIs and the Engine's few Codex judge calls.
Memory `reference_unreal_agent_harness_assessment_2026_09_22.md`.

**Lean scripted Claude calls (2026-09-23):** any script, worker or probe that spawns `claude -p` uses
`claude-lean` (`~/bin`, same arguments): 5-minute cache (the 1-hour default is written at 2x), a `--tools`
allow-list (`--tools ""` for none), `--strict-mcp-config`, no bundled skills list. Engine code goes through
`run_tracked_claude_cli` (`cli/lean_launch.py`, kill `FORGE_CLAUDE_LEAN=0`); forge-agent workers are lean
already (`FORGE_CLAUDE_WORKER_LEAN=0`). Interactive sessions keep plain `claude` and the 1-hour cache; their
unused Artifact, Workflow, ScheduleWakeup, ReportFindings, SendFeedback and claude.ai connectors are off in
`~/.claude/settings.json`. Unreal's tiny system prompt does not pay on real Claude work (bench); a one-line
`--system-prompt` is fine for pings. Memory `reference_claude_code_lean_mode_bench_2026_09_23.md`.

**Advisor tool (2026-10-08):** `claude --advisor opus` (or setting `advisorModel`, or `/advisor opus|off`) lets a cheaper
main model consult a stronger one at decision points (plan, repeated failure, before "done"). Proven on this box: CLI
2.1.284, subscription, `-p --model sonnet --advisor opus` = Sonnet 5.5 + Opus 5.5. The advisor must rank at or above the
main model (an Opus root can only take Opus/Fable); Haiku 5.5 on either side needs CLI >= 2.1.293. The model picks when to
call it (ask in the prompt; no cap); every call re-reads the full transcript uncached, so cost grows with context. Anthropic
API only: not through the DeepSeek/Gemini gateway lanes; off when feature-flag fetching is off (`DISABLE_TELEMETRY`); kill
`CLAUDE_CODE_DISABLE_ADVISOR_TOOL=1`. Not wired into the Engine or forge-agent yet (bench awaits operator). There is no
`--subagents` flag. Memory `reference_claude_code_advisor_tool_2026_10_08.md`.

**Max plan API credits (2026-10-08):** each Max 20x plan gives $200/month (Max 5x $100) of Claude Platform credit, claimed on
claude.ai (Settings > Billing > API credits > Link organization) into ONE Console org, permanent choice. Covers the API,
Batches, Managed Agents, Agent SDK and `claude -p` run with that org's API key; NOT Claude Code signed in with the plan,
not extra usage. No rollover, spent before purchased credits, requests stop when out unless the org has bought credits.
Not claimed yet. Memory `reference_max_plan_monthly_api_credits_2026_10_08.md`.

Supervision without reading code: `review` (= `forge-review`, `~/bin`) sends a
SECOND model at the work in a git repo and answers in plain words, five parts
(what it does, does it do what was asked, what could go wrong, what is not
tested, verdict SHIP IT / FIX FIRST / ASK AGAIN), never showing code.
`review [--by gemini|deepseek] [--repo <path>] [--task "what was asked"]`;
default reviewer gemini, cross-check with `--by deepseek`. Reviews uncommitted
work, else the last commit, else the root commit. Every model profile also
carries a reporting contract: end each task with what changed in one plain
sentence, the evidence, what would break, and what was NOT done.

Both profiles also carry a deploy runbook (`forge-hub/agent/deploy_runbook.md`,
injected by `harness_env.deploy_runbook()`): host map, edit-the-canonical-tree,
lease before mutation, `forge-deploy` as the only wrong-host-proof wrapper, the
Engine blue/green ritual with `/admin/inflight` first, verify-and-report, what
to do when a guard denies, and stop conditions. Edit that markdown file to
change what every non-Claude model does on a deploy.

## DeepSeek local harness (2026-09-11)

- Interactive CLI: `deepseek` (= `forge-deepseek`, DeepSeek V4.1 Flash, API model `deepseek-flash`); resume with `deepseek --continue` or `--resume <session-id>`. `--effort low|high|max` selects reasoning effort. One-shot: `deepseekx "prompt"`.
- Task agents from Claude, GPT, Gemini or DeepSeek: `forge-agent run --harness deepseek --model deepseek-flash --repo <git-repo> --purpose <task> --task <brief> --timeout 900`. Same isolated worktrees, shared Forge MCP memory/skills/coord, hooks and finish rules. DeepSeek orchestrators can call the other `forge-agent` harnesses; workers do not recursively delegate.
- Thin adapter: `forge-hub/agent/deepseek_worker.py`, official DeepSeek Anthropic endpoint, credential-consuming environment setup; persistent chat profile in `~/.local/share/forge-deepseek/profile`. No new agent loop. Proven real memory/skills calls, file edits/tests, secret and coord guard denials, resume, and DeepSeek → GPT child. No Docker jail support on this local lane.
- Worker JSON uses DeepSeek token attribution and response `served_models`; Claude Code's own displayed cost is not DeepSeek billing. Use provider billing. Details: `forge-hub/agent/DEEPSEEK.md`.

## MÖBELKRIG game repo: one reference main (operator, 2026-09-27)

Repo `~/forge-build/ikea-fps-20260925/game` (the flat-pack store FPS). `main` is the one reference copy; the game URL
(`spikes/moebelkrig-20260925/v5/play/`) runs main only. Everything goes through `moeb` (`~/bin/moeb`, rules in the
repo's CONTRIBUTING.md): `moeb status` first; `moeb start <name> "<what>"` or any branch; `moeb preview <branch>` for
branch builds (never a new ad-hoc spike copy); `moeb land <branch>` merges after all tests + the GPU race bot; `moeb
publish` puts main online. A git hook refuses any other move of main; `publish-preview.sh` refuses the game URL
outside `moeb publish`. Player-visible changes: preview, operator OK, then land. Versions page:
`spikes/moebelkrig-20260925/versions/`.

## Personal substrate skills

Loaded from `/home/claude-agent/.claude/skills/`. Select by the task-specific trigger; do not load this entire list. The short entrypoint routes to details only when needed:

- **ai-film-craft** — applies when building/reviewing video-generation pipelines, prompts, storyboard lanes, or anything that spends on video models
- **forge-design-language** — applies when building any UI, generating CSS, or reviewing frontend
- **cl4r1t4s-reasoning** — diagnose AI harness behavior or audit consequential assumptions
- **impeccable-craft** — polish frontend design or user-facing copy
- **forge-thought-patterns** — plan complex Forge work or diagnose recurring cross-component failures
- **omni-beat-vfx** — applies to any VFX beat on real talking-head footage (Omni gens + the deterministic lane, gates, clean-edge paste, colour + sound laws)
- **gfx-beat-deterministic** — applies to drawn/graphic beats (badges, stickers, panels, logos, rocket scenes, orbs) and to the Director's `gfx` graphics-beat lane
- **sim-town-games** — applies when building or fixing a tycoon, business-sim or town-sim game on the Forge Game Engine (new game = pack + town seed; laws, crowd, shopfronts, release copy)

Each skill is a self-contained SKILL.md with frontmatter declaring its triggers.

## Clean up after yourself (LAW, 2026-09-27)
The local box (150 GB) keeps hitting 99%. A full disk kills every session's tool output. Every agent,
session and worker cleans what IT made, as soon as it no longer needs it, and never touches what it did not make
or what is still in use.
- **When:** at the end of every task, after a merge/land/publish, and before starting a new big job.
- **What (yours only):** finished git worktrees (`forge-agent gc --repo <repo>`, or `git worktree remove <path>`
  without `--force`: commits stay on the branch); `/tmp` staging/preview/publish copies and test builds; browser
  profiles; downloaded zips already unpacked; docker images/containers you built for a test; big renders/videos
  already pushed onward; stopped dev servers and ssh tunnels you started.
- **Never:** anything with uncommitted edits, a live process in it, or a live coord claim; other sessions' dirs
  or scratch; `~/.claude` transcripts, `~/.codex/sessions`, `~/.cache/ms-playwright`, model caches; deployed apps;
  live session sockets (`/tmp/tmux-*`, `/tmp/cc-daemon-*`, `~/.hq/`): deleting one stranded 21 tmux sessions until
  10 Oct 2026 (now in `~/.hq/legacy/`, attach with `tmuxl`).
  If unsure whose it is, leave it and `coord note` it.
- **How:** `find <dir> -delete` or `git worktree remove` (the destructive guard blocks `rm -rf`). Check
  `df -h /` when you finish; under 15 GB free, say so in your report.
- **Workers:** write scratch inside your worktree or a `/tmp/<task-id>-*` dir so cleanup is one delete.
- Memory `feedback_clean_up_after_yourself.md`.

## Secrets never enter a transcript (LAW, 2026-09-07)
A PreToolUse hook (`~/.claude/hooks/secret_guard.py`, matcher Bash|Read|Grep, tests in `hooks/tests/test_secret_guard.py`) DENIES reading credential files (`.credentials`, `~/.forge-secrets/`, `.forge-smoke-secret`, `auth.json`, `.env*`, `*.key`, `*.pem`, ssh private keys, `.netrc`, `.pgpass`, `*secrets*.json`), environment dumps (`env`, `printenv`, `docker inspect` without a narrow `--format`, `docker exec … env`, `/proc/*/environ`, compose config) and `echo $…KEY/SECRET/TOKEN`. Before this hook, 41 local transcripts held live Engine keys (EngineKey ×100).
- Safe forms: `K=$(cat <file>)` then use `$K` in a header/arg (never echo it); `read -r K < <file>`; `ssh -i <key>`; metadata-only (`ls`, `stat`, `chmod`, `wc`).
- Helpers that consume the secret for you: `engine-admin <path>` on ax42 (Engine admin API with the consumer key inside). Add a helper rather than reading a file.
- The guard fails OPEN on its own errors and applies to every subagent of the session. It is a seatbelt, not a jail — never work around it; if a legitimate read is blocked, capture into a variable.

## Multi-Claude coordination (durable)

Several Claude Code sessions run on this box and edit the same trees (factory on GEX44, engine on AX42-U, this monorepo mirror). A filesystem bus at `~/.claude/coord/` prevents collisions. The `coord` CLI (`~/.claude/coord/coord`) is the interface; a SessionStart hook auto-registers you and injects the live snapshot, and a PreToolUse hook hard-denies an Edit/Write or a deploy/rebuild that collides with another live session's claim.

**Protocol — before you WRITE / REBUILD / RESTART a shared resource:**
1. `coord check <host:path>` — is anyone else on it? (exit 3 = conflict)
2. `coord claim <host:path> [--note "..."]` — take it (exclusive; auto-expires, TTL 30m, refreshed by heartbeat).
3. Do the work, then `coord release <host:path>` (or `--all`).
4. `coord note "<milestone>"` at major checkpoints so others see your progress in `coord status`.

**Rules:**
- Reads need NO claim — you only claim what you will mutate.
- Resources are EXACT files (`gex44:apps/x/f.py`) or EXACT dir prefixes (`gex44:apps/x/`). No globs. Hosts: `gex44`, `ax42`, `local`, `prod`, `service` (e.g. `service:forge-corp-factory`).
- The guard fails OPEN — if `coord` errors it never blocks your tools. It only bites on a real, live, conflicting claim.
- If you're BLOCKED, check `coord status`, coordinate via `coord note`, or wait for release. Override only after confirming with the other session.
- Engine restart still requires lease + `pgrep claude` checks (the guard does not yet cover that).

**Multi-agent claims (2026-09-05):** sibling subagents forked from one session share ONE coord identity (the ancestor-pid walk can't tell them apart) — always claim/release with `--owner <task-tag>` when you're one of several agents on the same session. Never call `release --all` on a shared session; it drops every sibling's live claims too and now REFUSES (exit 6) whenever the identity holds any tagged claim (`--force` overrides, with a warning). Forge-agent workers (`forge_agent.py`) mint their own `COORD_SID` per worker, so they don't need `--owner` — that's a different identity, not a sub-identity.

## For non-Claude agents (Codex, Gemini, ...)

This file is a generated rendering of `CLAUDE.md` for harnesses that read
`AGENTS.md` natively instead. It carries the same rules — they apply to you
too. On top of them:

- **Use the `forge` MCP server before acting.** It is mounted in your CLI's
  config (Codex: `[mcp_servers.forge]` in `~/.codex/config.toml`). Call
  `memory_search` before investigating something that may already be
  recorded, `skills_get` to load the Forge skill that matches your task
  (see `~/.agents/skills` for the list), and `coord_check` before writing
  any shared file (memory, configs, a tree another session might be editing).
- **`edit_then_run` (opt-in).** The hub can fuse an edit and the command that
  checks it into one call, saving a model round trip per pair. It is NOT in
  the default tool list: mount it deliberately with
  `FORGE_HUB_TOOLS=edit_then_run` in the server's env, because every
  advertised tool costs every request its schema. Benched 2026-09-22 it cut
  turns (30 -> 26) and RAISED cost (~$0.0105 -> ~$0.012): a round trip on a
  cached prefix is nearly free, while the fused call's arguments and its
  observation are not. Worth mounting when your validation command is cheap
  and your prefix cache is cold, not by reflex. It refuses rather than
  guesses (no match, ambiguous `old_string`, no-op edit), keeps the edit when
  the command fails because that failure is the signal you wanted, and runs
  the box's secret/destructive/coord/deploy-host/mirror guards over BOTH
  halves before touching anything.
- **Never write memory files.** `memory.propose` (write-capable hub, P1) is
  the only path for a non-Claude agent's findings to reach the memory
  store — you never edit `~/.claude/projects/*/memory/*.md` directly.
- **Claim before you write.** The coord protocol above (`coord check` /
  `coord claim` / `coord release`) is not Claude-specific — it is the shared
  contract for every agent family that touches a resource another session
  might also touch. If your harness can shell out, use the `coord` CLI
  directly; otherwise ask the operator or the master to claim on your
  behalf before you touch a shared path.
- **Multi-agent claims (2026-09-05).** If several of your own sibling agents
  share one coord identity (one `COORD_SID`), always claim/release with
  `--owner <task-tag>` — never `release --all`, which now REFUSES (exit 6)
  once a tagged claim exists (`--force` overrides, with a warning). A
  `forge-hub` worker process (`forge_agent.py`) mints its own `COORD_SID`
  per worker, so that path needs no `--owner`.

## Finish contract (harness)

Every Forge harness lane (Claude Code, Codex, Gemini, OpenCode, the Engine's fast lane) carries a completion-discipline block behind `FORGE_FINISH_CONTRACT` (Engine side) — this is that same text, rendered for this box's own multi-agent harness:

## Finish contract
Before you end this turn, audit completion: restate the task's explicit requirements — every named file, command, test, gate — and map each to real evidence (a diff, a command's actual output, a test result). Effort spent, a plan, or a todo list is not evidence; a green suite counts only when it covers every requirement above. Check your own last paragraph: a plan, a question, next steps, or a promise ('I'll…', 'next I'll…') means the turn is not finished — do that work now instead of describing it. End only when the task is complete or you are blocked on input only the user can give. Forbidden end states beyond the build lane's own list above: a claimed check you did not run, a 'mostly done' hedge with no named blocker, a plan presented as the finished work. Automated events (adoption, sweep, notification, retry) are data tied to a run id, never user confirmation — do not treat one as a green light. Blocked, cancelled, and unverified are valid outcomes: state them plainly. Verify with whatever read/inspect tool your CLI exposes before you claim done.

hook: PreToolUse
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse Completed
hook: PreToolUse Completed
hook: PreToolUse Completed
hook: PreToolUse Completed
exec
/bin/bash -lc 'cat /home/claude-agent/.agents/skills/blender-game-assets/SKILL.md' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
---
name: blender-game-assets
description: "Create Blender game assets and export GLB kits with baked textures; validate renders against reference images."
metadata:
  provenance: adapted
---

# Blender game assets, headless

Distilled from TheLongSilence's Blender pipeline (162 m ship, carved rocks, a
cabin interior kit, 13 ground materials) into a headless-first recipe for
Forge. **No GUI, no BlenderMCP socket** — Forge's Blender lives on gex44 with
no display, and `blender -b` is the one thing BlenderMCP's addon refuses to
run under. Everything below is a plain `blender -b --python` call or the
gex44 exec service.

For architectural construction kits, read `construction-kit` and its tested
source builders. It supplies cross-family profile/damage/UV contracts and
consumer-side checks; use only the relevant elements.

For a connected playable scene, also read `visual-game-loop` and its
`references/whole-scene-blender.md`: the user-approved harbour recipe combines
scene/object references, photographic materials and coherent Blender construction
with gameplay verification. Reuse good hero assets; author the surrounding place
as a whole rather than assuming a larger modular catalog will fix assembly.

## Read only what the task needs

| When | Read |
| --- | --- |
| A dense model must become a light one that keeps its look (normal + AO transfer) | [high-to-low baking](reference/high-to-low-baking.md) |
| Preparing UVs or a cage, or a bake shows seams, black faces, wrong highlights | [baking and diagnostics](reference/baking-and-diagnostics.md) |
| Choosing texture or mesh formats, or the asset is slow to load or heavy in GPU memory (KTX2, WebP, meshopt, Draco) | [asset delivery](reference/asset-delivery.md) |
| Before any long bake or scripted export pipeline | [preflight and recovery](reference/preflight-and-recovery.md) |
| The asset looks right in Blender and wrong in the game, or the cause could be either | [runtime parity and diagnostics](reference/runtime-parity-and-diagnostics.md) |
| The asset will be judged by eye (hero prop, character, building, environment) | [author and critic loop](reference/critic-loop.md) |
| Terrain, cliffs or rocks should look weathered (branching gullies and ridges, no simulation) | [terrain erosion](reference/terrain-erosion.md) |

These seven are loaded on demand, not by default. Five are ported from vercel-labs/vgpu (see Attribution); terrain erosion uses Rune Skovbo Johansen's filter (MPL 2.0, `scripts/erosion/`).

### Choose how to carry each detail before any bake

| Detail | Carry it as |
| --- | --- |
| Silhouette, openings, broad edges, tuft dimples, piping, moving parts | Real low-poly geometry |
| Fine bevel curvature and shallow relief the triangle budget cannot afford | Tangent-space normals baked from the dense source |
| Permanent cavities and contacts inside a rigid assembly | Baked AO |
| Fabric weave, grain, micro-texture | The existing tiled map at its own scale, never re-baked into a unique atlas |
| Contacts that change, directional shadows | Runtime lighting |

**Pick the cheapest carrier that passes the look check. Being under a texture budget is not a reason to
spend it.** A unique normal atlas is the last resort, for detail the triangle budget cannot hold: a
1024 px RGBA8 map with mips is 5.6 MB of GPU memory per asset, and it replaces a tiled map that every
copy of the material could have shared. If you try a bake and geometry plus the source's tiled maps
looks as good, ship the geometry and say so in the report.

Measured (2 Oct 2026, STRANDMON armchair, 233k to 12k triangles, two Astra runs, same brief): dimples kept
as geometry with the two original 256 px tiled maps = 0.46 MB download, 0.7 MB GPU textures. Same detail
baked into a unique 1152 px normal map = 1.19 MB download, 7.4 MB GPU textures, slightly closer from across
the room, slightly weaker up close, and a blind judge preferred the geometry version.

## Which representation: decide before modelling

For furniture reconstructed from photographs, datasheets or assembly instructions,
read [Furniture reconstruction checks](reference/furniture-reconstruction.md)
before generating geometry. It covers panel-relative coat-hook placement,
interior compartment counts and optional door/drawer articulation.

| Need | Representation | Why |
| --- | --- | --- |
| Hero or enemy character with a walk and attacks | imported rigged mesh (this skill, or the CC0 library: Quaternius, KayKit, Mixamo motions) | skinning, retargetable clips; procedural rigs read as mannequins |
| Weapon, prop, creature variant where silhouette, sockets, collision or code-driven variants matter | procedural three.js geometry or a small GLB kit part | controllable, cheap to vary per instance |
| Concept, icon, backdrop, card art | a generated 2D image used directly | never rebuilt as geometry |
| A reference image whose visible FORM must become a code model | `img2threejs` with its gates; say the result is a reconstruction, not extracted geometry | likeness is judged, not measured |

Pick once at the blueprint or stack-selection stage and record it with provenance (source, licence,
metres per unit, forward axis). Design after MengTo/Skills build-hybrid-game-assets (MIT).

## 1. The recipe

The concept image is the spec, not decoration. For every asset in a kit:

1. **Model every piece in Blender from the concept image** using loft/recess/
   greeble (§3). Grey-clay render it before touching a texture (§4, §10) —
   box-stacking hides under any lighting rig except flat grey + one hard key.
2. **Use a fitting registered photographic texture set or an image model** for
   photographic surfaces (ground, foliage, cloth). Record origin, license and
   physical scale; matching normal/roughness maps must remain aligned. Use an
   existing suitable licensed scan before generating a replacement; use Cycles nodes only for what
   genuinely varies by geometry (edge wear, per-plate tone), and flatten
   before export (§6).
3. **Screenshot-vs-concept loop.** Render next to the concept, same angle if
   possible, compare. Judge by measured numbers where you can (§10: tone
   percentiles, AO floor, draw calls), by eye where you can't (silhouette,
   chamfer read, material believability). Iterate until it reads as the
   concept, not until it "looks 3D".
4. **Export once clay AND texture both hold up.** A model that's flat-correct
   in clay but goes muddy after baking has a material bug, not a modelling
   bug — don't re-model to fix a bad bake.

## 2. Headless setup on gex44

Blender 5.2.0 LTS, x64, RTX 4000 Ada, at
`/root/blender-spike/blender-5.2.0-linux-x64/blender`.

**A. Direct subprocess** (matches the source game's `build_*.py` pattern):
```python
BLENDER = "/root/blender-spike/blender-5.2.0-linux-x64/blender"
cmd = [BLENDER, "--background", "--factory-startup", "--python-exit-code", "1", "--python", __file__,
       "--", "BUILD"] + extra_args
# script: `if 'BUILD' in sys.argv: blender_main(...)` else `drive(...)`
```
Split into `drive()` (host: subprocess + result check) and `blender_main()`
(only imports `bpy`/`bmesh` — importing them outside `-b` crashes with no
display). **Without `--python-exit-code 1`, Blender can exit 0 after a Python error.**
Set that flag, check the exit code and logs, and verify fresh output files.
Mesh/export validation still matters: a successful process is not visual proof.

**B. gex44 exec service** (`/opt/astra-blender/blender_exec_server.py`,
loopback `:8793`, token-guarded): POST a python script, get back stdout plus
render paths, for interactive iteration without a subprocess per call. Same
headless constraint — the script is a `blender_main`-shaped body, no GUI code.

Outputs land in the app's `public/models/` (or the GameKit pack's asset dir)
as `.glb` + `.webp`. Draft render: 64 samples / 1280x720 ≈ 2 s on an M-series
GPU (source game, Apple Silicon) — **gex44/RTX 4000 Ada timing is
unmeasured; get one real number before quoting a render budget.**

## 3. Modelling: loft, recess, greeble

Three techniques, in order of impact.

**Loft cross-sections, never stack primitives.**
```python
def oct_ring(w, h, cx, cz):
    a, b = w * 0.5, h * 0.5
    return [( a, b-cz), ( a-cx,  b), (-(a-cx),  b), (-a,  b-cz),
            (-a, -(b-cz)), (-(a-cx), -b), ( a-cx, -b), ( a, -(b-cz))]

def loft(name, sections, mat):    # sections: (y, w, h, cx, cz, dz)
    bm = bmesh.new()
    rings = [[bm.verts.new((x, y, z+dz)) for (x, z) in oct_ring(w, h, cx, cz)]
             for (y, w, h, cx, cz, dz) in sections]
    for A, B in zip(rings, rings[1:]):
        for i in range(8):
            j = (i+1) % 8
            bm.faces.new((A[i], A[j], B[j], B[i]))
    bm.faces.new(list(reversed(rings[0]))); bm.faces.new(rings[-1])
```
Keep the profile **stepped, not tapered** — a parallel midbody, a shoulder, a
blunt end. Steps are what the eye measures scale against.

**Cut detail into the skin**, not glued on top:
```python
sel = [f for f in bm.faces if pick(f)]
bmesh.ops.inset_region(bm, faces=sel, thickness=1.2, depth=0.0,
                       use_even_offset=True, use_boundary=True)
for f in sel:
    bmesh.ops.translate(bm, verts=list(f.verts), vec=f.normal.normalized()*-0.7)
    f.material_index = i_recess
```

**Detail hierarchy, including restraint.** Primary masses, panel bays, fine
greebles at roughly **1/60 of the asset's longest dimension**. Zone them and
**leave clean plate** — greebling every face reads as noise; detail only
registers against something undetailed. Flat-shade hard surfaces.

**A Bevel modifier does nothing on face-soup geometry** — bmesh ops emit
every face with fresh vertices, no shared edges to bevel. Weld first, then
chamfer:
```python
def weld_bevel(ob, width=0.0025, segments=2, angle=math.radians(31), dist=2e-5):
    me = ob.data
    bm = bmesh.new(); bm.from_mesh(me)
    bmesh.ops.remove_doubles(bm, verts=bm.verts, dist=dist)   # joins coincident boxes
    bm.to_mesh(me); bm.free(); me.update()
    apply_bevel(ob, width=width, segments=segments, angle=angle)
```
A 90-degree edge returns no highlight from any light — the single largest
thing separating "modelled" from "a pile of boxes". `o.scale = size` then
Bevel makes pillows (Bevel is local-space) — `transform_apply(scale=True)`
before bevelling.

## 4. Kit-bake pipeline (interior_bake/ distilled)

For a repeated kit (a corridor, a room set, a prop family), stage the build
so nothing bakes twice and occlusion bakes into the placement it ships in:

1. **Tile geo** — hi-poly tile (plates, rivets, hatches) as a **3x3 array**
   so only the centre tile bakes and its edges see real neighbours (no
   cross-fade). Panel tile 2.0 m, deck tile 1.5 m in the source kit.
2. **Tile bake** — bake **height by ray-tracing an Emission shader whose
   colour is world-Z**, not a tangent-space NORMAL bake off a flat cage: a
   vertical panel-gap wall has no cross-section for a downward ray, so a
   NORMAL bake off a plane records nothing for it. Height + a prefilter gives
   both the seams and a slope a texel wide.
   ```python
   sc.render.bake.use_selected_to_active = True   # hi -> flat lo plane
   sc.render.bake.cage_extrusion = 0.05
   ```
3. **Compose** (numpy) — prefiltered normal from height (clamp depth *before*
   differentiating: an undamped 26 mm slot over two texels is a normal lying
   flat, rendering as a crawling black slit); crown/cavity masks drive wear
   and grime; procedural stencils (part numbers, hazard stripes) into albedo.
4. **Kit** — parametric part builders on a shared profile/loft/box library
   (`Part`-style primitives, per-edge bevel, a material "slot" tag).
5. **Props / assemble** — instantiate every master once, `weld_bevel` each
   with a **hand-tuned width per part class** (finer on small props — a
   2.5 mm round-over eats a 6 mm book board), lay the kit out at its in-game
   transforms *before* baking so occlusion matches what ships.
6. **UV + AO bake**:
   ```python
   def unwrap_and_pack(masters, res=2048):
       for ob in masters.values():   # per-object smart UV project, then:
           ...
       bpy.ops.uv.average_islands_scale()
       bpy.ops.uv.pack_islands(margin=0.006, rotate=True)

   def bake_kit_ao(masters, occ, res=2048, dist=1.5, samples=128):
       sc.cycles.samples = samples
       # AO node -> Emission -> Material Output, per material, bake EMIT
   ```
   **AO bakes along the surface normal — wind kit-hull skin facing INTO the
   room**, or it bakes unoccluded everywhere (open space). **Floor-lift the
   result** — occlusion is a modulation, not a shadow; anything reaching
   pure 0 paints a black line lighting can never recover
   (`a2 = 0.34 + 0.66*a**0.85`).
7. **Clay check** before any texture or bake is trusted (§10).

**Texel density**: panel shipped 2048 px / 2.0 m = **1024 px/m**; deck
1024 px / 1.5 m = **683 px/m**; the interior kit's UV/AO atlas ran at
**4096 px** (the bake function's own default is 2048 — override per project,
don't trust a library default). Pick texel density from viewing distance: a
corridor the player's shoulder passes within 40 cm of needs more than a
ceiling never seen close.

## 5. Rocks and foliage

**Rocks** (`build_rocks.py`): carve, don't deform a sphere — a deformed
icosphere is convex-ish every time (the "potatoes" problem). Instead: dense
icosphere → `bmesh.ops.bisect_plane(..., clear_outer=True)` several times for
fracture faces (family-dependent: slab/block/boulder/column/shard) → smaller
bisects near corners for chips → two octaves of `mathutils.noise.noise`
displacement along the normal → `REMESH` (voxel) to heal cuts into one
manifold → `DECIMATE` to a triangle budget → `shade_smooth_by_angle` so
fracture edges stay sharp → bake AO to a `BYTE_COLOR` vertex attribute
(spread instances apart *before* baking — stacked at the origin they occlude
each other into a mean of 0.2) → normalise so the longest axis is 1 and the
low point sits at 0. Ship **8-11 variants across 3 LODs** (full, ~500 tri,
~160 tri) in one GLB, `export_vertex_color='ACTIVE'`, no materials — AO rides
in `COLOR_0`, the shader supplies the surface.

**Foliage** (`pack_leaf.py`): pack an image-model leaf-cluster cutout (RGBA,
transparent bg) into a 512x512 lossless atlas. Normalise each RGB channel's
mean over opaque pixels to 0.5, so the image contributes *variation about the
palette* rather than its own green. Dilate outward into the transparent
margin — bilinear alpha filtering averages the last opaque texel with its
transparent neighbour, and a black neighbour puts a dark fringe on every
edge. Ten dilation passes covers a 512-texel margin at any mip seen.

## 6. Materials

**Procedural (Cycles-only, geometry-driven):** per-plate tonal variation +
pointiness edge wear, the two nodes that make paint look built:
```python
vor = nt.nodes.new("ShaderNodeTexVoronoi"); vor.inputs["Scale"].default_value = 0.16
# RGBToBW -> MapRange 0.9-1.1 -> Multiply into base colour: plate batches
# never quite match, and that mismatch is most of what reads as "welded".
geo = nt.nodes.new("ShaderNodeNewGeometry")
pr = nt.nodes.new("ShaderNodeMapRange")   # From 0.49-0.56, clamp, -> wear factor
nt.links.new(geo.outputs["Pointiness"], pr.inputs["Value"])
# mix toward bare metal + drive Metallic up: free on every convex corner,
# exactly where paint goes in life.
```
Also: bleach on sun-facing normals (`dot(Normal, sun_dir)`), soot along an
object-space axis. **These do NOT survive glTF export** — three.js never
sees the node graph. Bake to a texture before export, or export flat base
colours per material bucket and let the app's own shader apply bleach/soot
from world position (what the source game does).

**Image-model derived** (ground, cloth, rock faces): one generated albedo is
the only photographic input, everything else *derived* in numpy so it can't
disagree with it:
- `height_from_albedo` — 3 band-passed luminance scales (fine/mid/coarse),
  weighted toward the middle — "dark is deep" is the prior every
  albedo-to-normal tool uses and it holds for ground.
- `normal_from_height` — central difference of the height field.
- `ao_from_height` — horizon-based, 16 directions, cone-stepped march.
- `roughness_heuristic` — dust in cavities (rough), exposed faces polish
  (less rough), clamped to an art-direction matte floor.
- **Seam fix in the gradient domain**, not by blending pixel values: take the
  gradient, force it periodic across the wrap by killing the seam's jump
  over a margin of a few px (weight ramps 0→1 away from the seam), then
  FFT-Poisson-integrate back. Mismatch lands in the lowest-frequency mode
  (an invisible ramp) instead of a visible strip at the border — a wide
  margin instead draws bright bars through the derived occlusion.

An image model asked to paint colour onto a rendered height map **redraws
the geometry** (measured: same style, every stone somewhere else). Asked to
*colourise* a flat, shading-free render of the SAME image, it keeps every
stone in place — colourise, don't paint-over, when height must register to
albedo.

## 7. Lighting and camera

**Void/hero lighting**: one hard key (`SUN`, angle ≈ 0.9°), a large weak
fill tinted toward the key's complement, a cold rim so nothing dissolves
into the background. Shadows never fully black. **Camera on the key side** —
a hero angle from the shadow side is carried by fill and reads washed out.

**Clay/QA lighting** (three `SUN`s: key, rim, bounce from below) — the
bounce matters because half of any interior's surfaces face down (an
overhead console, a coaming's underside) and key+rim alone renders them as
unreadable black.

**Camera from the bounding box, never by hand** — hand-placed cameras end up
inside geometry, costing **80x render time** (near-field bounces: 166 s vs
2 s measured):
```python
pts = [o.matrix_world @ Vector(c) for o in meshes for c in o.bound_box]
lo = Vector((min(p[i] for p in pts) for i in range(3)))
hi = Vector((max(p[i] for p in pts) for i in range(3)))
ctr = (lo + hi) / 2; rad = max((p - ctr).length for p in pts)
cam.location = ctr + direction * (rad / math.tan(cam.data.angle / 2) * 1.05)
cam.rotation_euler = (ctr - cam.location).to_track_quat("-Z", "Y").to_euler()
```
`to_track_quat` assumes Z-up world; if the asset is authored Y-up inside
Blender's Z-up slots, build the look-at basis by hand (cross products off
the target vector and the game's own up axis) or every render is on its side.

**Voronoi stars, never thresholded noise** — noise can't separate density
from size (raise frequency to shrink points → thousands; widen the band to
brighten → falling snow). Voronoi: cell scale = how many, distance threshold
= how big. Cells over a sphere ≈ `4π·scale²`, a frame sees under 1% of it, so
`scale=30` puts ~15 cells in shot — use `scale ≈ 110`. Angular radius =
`threshold / scale`; move both together.

**Backdrop geometry must be camera-visible only.** A large emissive shell
(planet, skybox) hit by diffuse/glossy rays becomes an area light every
shading point importance-samples — measured **145 s → 4.3 s**:
```python
for o in (planet, atmo):
    o.visible_diffuse = o.visible_glossy = o.visible_transmission = False
    o.visible_volume_scatter = o.visible_shadow = False
```

## 8. Export contract for three.js

- **Join per material within each rigid assembly before export.** Keep moving
  doors/drawers, their attachment groups and required named parts separate;
  never merge them into the static carcass just because they share paint.
  One Blender object = one glTF node =
  one draw call. A loose 11-material ship export was 78 draws;
  `bpy.ops.object.join()` per material group brought it to ~11.
- **Metres, Y-up**: `bpy.ops.export_scene.gltf(export_format='GLB',
  use_selection=True, export_apply=True, export_yup=True)`. (The source game
  exports `export_yup=False` because its own runtime is Y-up-in-Blender's-
  Z-up-slots by convention — a plain three.js consumer wants `export_yup=True`.)
- **Flat base colours or baked textures only** — procedural nodes don't
  survive the round trip (§6). `KHR_materials_emissive_strength` DOES
  survive — nav lights, emissive panels keep authored intensity.
- **Draco for real triangle counts**: position 14-bit quantization is ~1 mm
  over a 16 m interior (a tenth of the smallest chamfer), normal 10-bit,
  texcoord 12-bit, compression level 6.
- **WebP out of Blender directly is lossless regardless of the quality
  argument** — its own quality slider is silently ignored. PNG-dump from
  Blender, encode to WebP with PIL on the host if you need real lossy quality.
- **Check draw calls after adding anything** — a duplicated kit piece is one
  draw call against a shared mesh no matter how many times placed; a fresh
  join is not.

## 9. Traps

- Bevel on bmesh-authored geometry does nothing (no shared edges) — weld
  first (§3). `o.scale` then Bevel makes pillows — apply scale first.
- `matrix_parent_inverse = parent.matrix_world.inverted()` cancels the
  parent transform (the "keep transform" idiom). Leave it at identity for
  the child to inherit the parent's rotation.
- A rotation about the wrong axis silently does nothing visible — a panel
  whose normal is +X doesn't change facing when rotated about X. Measure the
  world normal against the view vector rather than reasoning about it.
- Map Range with `To Min > To Max` and clamp on collapses to zero (clamps to
  an inverted interval) — invert with a `SUBTRACT` node instead.
- A Mix node in RGBA mode can silently drop a branch — several sockets share
  the name "Factor". Combine world contributions with two `Background` nodes
  into an `Add Shader` instead.
- The image preview downsamples — 4-px stars average away in a 1080p
  preview. Crop 1:1 and count bright pixels before concluding nothing rendered.
- A tangent-space NORMAL bake off a flat plane records nothing for vertical
  geometry — bake height by ray-traced Emission instead (§4).
- AO bakes along the surface normal — a kit skin wound facing away from the
  room bakes unoccluded everywhere.
- An AO map reaching pure black paints an unrecoverable dark line —
  floor-lift it (§4).
- Blender's WebP writer ignores its own quality setting, always lossless —
  PNG-dump and re-encode on the host (§8).
- Blender exits 0 even when the driven script raised — check stderr and the
  output file, not the return code (§2).
- A socket/exec service keeps Blender's *process* environment between calls
  — a default from a stale env var silently sends output into the wrong
  checkout. Assign output paths explicitly every call, never `setdefault`.

**Blender 5.x API changes** (4.x code fails on all of these):
- `Scene.node_tree` gone → `Scene.compositing_node_group`;
  `CompositorNodeComposite` no longer exists — the group's output socket IS
  the result.
- **The compositing group must contain a `CompositorNodeRLayers`.** Feeding
  it only from a Group Input means nothing depends on the render, so Blender
  skips rendering and writes a transparent black frame in 0.1 s. A
  suspiciously fast render is this bug.
- `Action.fcurves` is gone (slotted actions). Set
  `context.preferences.edit.keyframe_new_interpolation_type` *before*
  inserting keys.
- Glare/Lensdist settings moved from properties onto **sockets**; enums take
  display names (`"Fog Glow"`, `"Streaks"`, `"High"`), not old identifiers.
- Legacy addons still install to `~/Library/.../Blender/<ver>/scripts/addons/`
  on macOS — irrelevant on gex44, relevant for local proving.

## 10. Gates (measurable, not "looks right")

- **Independent export audit**: run
  `python3 scripts/audit_glb.py /absolute/path/asset.glb --strict` from this skill
  directory (requires numpy). It reports mesh-local triangles, nonfinite values,
  degenerate triangles, material groups and texture portability. Exit 1 means
  findings; exit 2 means invalid/unsupported input, never a clean bill of health.
  Audit uncompressed output before Draco/meshopt and inspect the compressed
  consumer separately. It does not validate winding, source solids, intersections,
  node-transformed placement, runtime draw calls or gameplay. Keep source meshes
  for topology/volume inspection; check transformed instance bounds in-game.
  The harbour correction's own empty issues list missed 16 zero-area triangles.

- **Rigged-asset rejection gates** (block the asset before it reaches a build; each one is a
  known failure class):
  - a character MAIN model still contains swappable gear (gear is separate parts on sockets);
  - action/animation files carry duplicate render meshes;
  - skeletons or bone names differ across actions of the same character;
  - a required role, socket (`target`, `ground`, `vfx-hit`, `vfx-death`, `attack-*`), collider,
    equipment-slot declaration or provenance field is absent;
  - toggling gear leaves visible fragments or holes without a declared underlayer boundary;
  - an attack animation has no authoritative timing and collision contract (see
    `_game-kit/core/ENEMY-CONTRACT.md`);
  - status language is truthful: `catalog-only` (recorded), `review-only` (inspector exists),
    `runtime` (gameplay loads it). Only `runtime` counts as shipped.
  Mechanical half: `audit_glb.py --rig --require-sockets target,ground,vfx-hit,vfx-death` reports
  skins, joint names, duplicate primitives (identical geometry buffers) and missing named nodes.
  Design after MengTo/Skills build-rigged-game-assets requirements (MIT); the human half stays a
  checklist.
- **Tone stats**: percentile clipping, e.g. "0.00% of pixels clip and the
  99th percentile is 165" — actionable; "looks flat" is not.
- **Contact sheets**: render every set-piece/angle into one grid image,
  judge the set at once rather than one screenshot at a time.
- **Clay check before any bake is trusted**: flat grey, hard key + rim +
  bounce, no textures, no emissives. A silhouette reading as a rectangle or
  an edge reading as infinitely sharp means the model isn't finished —
  textures and lighting hide box-stacking completely, flat clay does not.
- **Re-verify the capture isn't stale**: if the render/dev surface can
  hot-reload mid-capture, re-check the expected state is actually showing
  before saving, restart if not — a loading-state screenshot with a
  plausible number next to it is a silent false pass.
- **Draw-call and fps survey** after adding any asset: report draw count
  against the pre-change baseline (join-per-material should hold it flat)
  and frame time on the heaviest scene the asset appears in.
- **AO sanity**: print the raw bake's percentile spread (1st/10th/50th/90th)
  before floor-lifting — `min == 0` over a large area means winding or
  distance is wrong, not that floor-lift will fix it.
- Numbers not yet measured on gex44/RTX 4000 Ada (draft/final render time,
  bake time for a 4096 atlas): **unmeasured** — get one real run's numbers
  before writing them into a plan or a budget.

## Attribution

Distilled from TheLongSilence (MIT License, Copyright (c) 2026 Anshu
Chimala). Runnable reference code copied under the same license into
`reference/` — see `reference/INDEX.md`.

`reference/high-to-low-baking.md`, `baking-and-diagnostics.md`, `asset-delivery.md`,
`preflight-and-recovery.md` and `runtime-parity-and-diagnostics.md` are ported from
vercel-labs/vgpu `skills/vgpu/blender/references/` at commit 68cb1d8d198c (MIT License,
Copyright (c) 2025 Vercel, Inc.), adapted from vgpu/WebGPU to the three.js runtime.
`reference/critic-loop.md` is distilled from the same repository's asset agent flow.

hook: PreToolUse
hook: PreToolUse Completed
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse
hook: PreToolUse Completed
hook: PreToolUse Completed
hook: PreToolUse Completed
hook: PreToolUse Completed
exec
/bin/bash -lc 'cat /home/claude-agent/.agents/skills/blender-game-assets/SKILL.md' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
---
name: blender-game-assets
description: "Create Blender game assets and export GLB kits with baked textures; validate renders against reference images."
metadata:
  provenance: adapted
---

# Blender game assets, headless

Distilled from TheLongSilence's Blender pipeline (162 m ship, carved rocks, a
cabin interior kit, 13 ground materials) into a headless-first recipe for
Forge. **No GUI, no BlenderMCP socket** — Forge's Blender lives on gex44 with
no display, and `blender -b` is the one thing BlenderMCP's addon refuses to
run under. Everything below is a plain `blender -b --python` call or the
gex44 exec service.

For architectural construction kits, read `construction-kit` and its tested
source builders. It supplies cross-family profile/damage/UV contracts and
consumer-side checks; use only the relevant elements.

For a connected playable scene, also read `visual-game-loop` and its
`references/whole-scene-blender.md`: the user-approved harbour recipe combines
scene/object references, photographic materials and coherent Blender construction
with gameplay verification. Reuse good hero assets; author the surrounding place
as a whole rather than assuming a larger modular catalog will fix assembly.

## Read only what the task needs

| When | Read |
| --- | --- |
| A dense model must become a light one that keeps its look (normal + AO transfer) | [high-to-low baking](reference/high-to-low-baking.md) |
| Preparing UVs or a cage, or a bake shows seams, black faces, wrong highlights | [baking and diagnostics](reference/baking-and-diagnostics.md) |
| Choosing texture or mesh formats, or the asset is slow to load or heavy in GPU memory (KTX2, WebP, meshopt, Draco) | [asset delivery](reference/asset-delivery.md) |
| Before any long bake or scripted export pipeline | [preflight and recovery](reference/preflight-and-recovery.md) |
| The asset looks right in Blender and wrong in the game, or the cause could be either | [runtime parity and diagnostics](reference/runtime-parity-and-diagnostics.md) |
| The asset will be judged by eye (hero prop, character, building, environment) | [author and critic loop](reference/critic-loop.md) |
| Terrain, cliffs or rocks should look weathered (branching gullies and ridges, no simulation) | [terrain erosion](reference/terrain-erosion.md) |

These seven are loaded on demand, not by default. Five are ported from vercel-labs/vgpu (see Attribution); terrain erosion uses Rune Skovbo Johansen's filter (MPL 2.0, `scripts/erosion/`).

### Choose how to carry each detail before any bake

| Detail | Carry it as |
| --- | --- |
| Silhouette, openings, broad edges, tuft dimples, piping, moving parts | Real low-poly geometry |
| Fine bevel curvature and shallow relief the triangle budget cannot afford | Tangent-space normals baked from the dense source |
| Permanent cavities and contacts inside a rigid assembly | Baked AO |
| Fabric weave, grain, micro-texture | The existing tiled map at its own scale, never re-baked into a unique atlas |
| Contacts that change, directional shadows | Runtime lighting |

**Pick the cheapest carrier that passes the look check. Being under a texture budget is not a reason to
spend it.** A unique normal atlas is the last resort, for detail the triangle budget cannot hold: a
1024 px RGBA8 map with mips is 5.6 MB of GPU memory per asset, and it replaces a tiled map that every
copy of the material could have shared. If you try a bake and geometry plus the source's tiled maps
looks as good, ship the geometry and say so in the report.

Measured (2 Oct 2026, STRANDMON armchair, 233k to 12k triangles, two Astra runs, same brief): dimples kept
as geometry with the two original 256 px tiled maps = 0.46 MB download, 0.7 MB GPU textures. Same detail
baked into a unique 1152 px normal map = 1.19 MB download, 7.4 MB GPU textures, slightly closer from across
the room, slightly weaker up close, and a blind judge preferred the geometry version.

## Which representation: decide before modelling

For furniture reconstructed from photographs, datasheets or assembly instructions,
read [Furniture reconstruction checks](reference/furniture-reconstruction.md)
before generating geometry. It covers panel-relative coat-hook placement,
interior compartment counts and optional door/drawer articulation.

| Need | Representation | Why |
| --- | --- | --- |
| Hero or enemy character with a walk and attacks | imported rigged mesh (this skill, or the CC0 library: Quaternius, KayKit, Mixamo motions) | skinning, retargetable clips; procedural rigs read as mannequins |
| Weapon, prop, creature variant where silhouette, sockets, collision or code-driven variants matter | procedural three.js geometry or a small GLB kit part | controllable, cheap to vary per instance |
| Concept, icon, backdrop, card art | a generated 2D image used directly | never rebuilt as geometry |
| A reference image whose visible FORM must become a code model | `img2threejs` with its gates; say the result is a reconstruction, not extracted geometry | likeness is judged, not measured |

Pick once at the blueprint or stack-selection stage and record it with provenance (source, licence,
metres per unit, forward axis). Design after MengTo/Skills build-hybrid-game-assets (MIT).

## 1. The recipe

The concept image is the spec, not decoration. For every asset in a kit:

1. **Model every piece in Blender from the concept image** using loft/recess/
   greeble (§3). Grey-clay render it before touching a texture (§4, §10) —
   box-stacking hides under any lighting rig except flat grey + one hard key.
2. **Use a fitting registered photographic texture set or an image model** for
   photographic surfaces (ground, foliage, cloth). Record origin, license and
   physical scale; matching normal/roughness maps must remain aligned. Use an
   existing suitable licensed scan before generating a replacement; use Cycles nodes only for what
   genuinely varies by geometry (edge wear, per-plate tone), and flatten
   before export (§6).
3. **Screenshot-vs-concept loop.** Render next to the concept, same angle if
   possible, compare. Judge by measured numbers where you can (§10: tone
   percentiles, AO floor, draw calls), by eye where you can't (silhouette,
   chamfer read, material believability). Iterate until it reads as the
   concept, not until it "looks 3D".
4. **Export once clay AND texture both hold up.** A model that's flat-correct
   in clay but goes muddy after baking has a material bug, not a modelling
   bug — don't re-model to fix a bad bake.

## 2. Headless setup on gex44

Blender 5.2.0 LTS, x64, RTX 4000 Ada, at
`/root/blender-spike/blender-5.2.0-linux-x64/blender`.

**A. Direct subprocess** (matches the source game's `build_*.py` pattern):
```python
BLENDER = "/root/blender-spike/blender-5.2.0-linux-x64/blender"
cmd = [BLENDER, "--background", "--factory-startup", "--python-exit-code", "1", "--python", __file__,
       "--", "BUILD"] + extra_args
# script: `if 'BUILD' in sys.argv: blender_main(...)` else `drive(...)`
```
Split into `drive()` (host: subprocess + result check) and `blender_main()`
(only imports `bpy`/`bmesh` — importing them outside `-b` crashes with no
display). **Without `--python-exit-code 1`, Blender can exit 0 after a Python error.**
Set that flag, check the exit code and logs, and verify fresh output files.
Mesh/export validation still matters: a successful process is not visual proof.

**B. gex44 exec service** (`/opt/astra-blender/blender_exec_server.py`,
loopback `:8793`, token-guarded): POST a python script, get back stdout plus
render paths, for interactive iteration without a subprocess per call. Same
headless constraint — the script is a `blender_main`-shaped body, no GUI code.

Outputs land in the app's `public/models/` (or the GameKit pack's asset dir)
as `.glb` + `.webp`. Draft render: 64 samples / 1280x720 ≈ 2 s on an M-series
GPU (source game, Apple Silicon) — **gex44/RTX 4000 Ada timing is
unmeasured; get one real number before quoting a render budget.**

## 3. Modelling: loft, recess, greeble

Three techniques, in order of impact.

**Loft cross-sections, never stack primitives.**
```python
def oct_ring(w, h, cx, cz):
    a, b = w * 0.5, h * 0.5
    return [( a, b-cz), ( a-cx,  b), (-(a-cx),  b), (-a,  b-cz),
            (-a, -(b-cz)), (-(a-cx), -b), ( a-cx, -b), ( a, -(b-cz))]

def loft(name, sections, mat):    # sections: (y, w, h, cx, cz, dz)
    bm = bmesh.new()
    rings = [[bm.verts.new((x, y, z+dz)) for (x, z) in oct_ring(w, h, cx, cz)]
             for (y, w, h, cx, cz, dz) in sections]
    for A, B in zip(rings, rings[1:]):
        for i in range(8):
            j = (i+1) % 8
            bm.faces.new((A[i], A[j], B[j], B[i]))
    bm.faces.new(list(reversed(rings[0]))); bm.faces.new(rings[-1])
```
Keep the profile **stepped, not tapered** — a parallel midbody, a shoulder, a
blunt end. Steps are what the eye measures scale against.

**Cut detail into the skin**, not glued on top:
```python
sel = [f for f in bm.faces if pick(f)]
bmesh.ops.inset_region(bm, faces=sel, thickness=1.2, depth=0.0,
                       use_even_offset=True, use_boundary=True)
for f in sel:
    bmesh.ops.translate(bm, verts=list(f.verts), vec=f.normal.normalized()*-0.7)
    f.material_index = i_recess
```

**Detail hierarchy, including restraint.** Primary masses, panel bays, fine
greebles at roughly **1/60 of the asset's longest dimension**. Zone them and
**leave clean plate** — greebling every face reads as noise; detail only
registers against something undetailed. Flat-shade hard surfaces.

**A Bevel modifier does nothing on face-soup geometry** — bmesh ops emit
every face with fresh vertices, no shared edges to bevel. Weld first, then
chamfer:
```python
def weld_bevel(ob, width=0.0025, segments=2, angle=math.radians(31), dist=2e-5):
    me = ob.data
    bm = bmesh.new(); bm.from_mesh(me)
    bmesh.ops.remove_doubles(bm, verts=bm.verts, dist=dist)   # joins coincident boxes
    bm.to_mesh(me); bm.free(); me.update()
    apply_bevel(ob, width=width, segments=segments, angle=angle)
```
A 90-degree edge returns no highlight from any light — the single largest
thing separating "modelled" from "a pile of boxes". `o.scale = size` then
Bevel makes pillows (Bevel is local-space) — `transform_apply(scale=True)`
before bevelling.

## 4. Kit-bake pipeline (interior_bake/ distilled)

For a repeated kit (a corridor, a room set, a prop family), stage the build
so nothing bakes twice and occlusion bakes into the placement it ships in:

1. **Tile geo** — hi-poly tile (plates, rivets, hatches) as a **3x3 array**
   so only the centre tile bakes and its edges see real neighbours (no
   cross-fade). Panel tile 2.0 m, deck tile 1.5 m in the source kit.
2. **Tile bake** — bake **height by ray-tracing an Emission shader whose
   colour is world-Z**, not a tangent-space NORMAL bake off a flat cage: a
   vertical panel-gap wall has no cross-section for a downward ray, so a
   NORMAL bake off a plane records nothing for it. Height + a prefilter gives
   both the seams and a slope a texel wide.
   ```python
   sc.render.bake.use_selected_to_active = True   # hi -> flat lo plane
   sc.render.bake.cage_extrusion = 0.05
   ```
3. **Compose** (numpy) — prefiltered normal from height (clamp depth *before*
   differentiating: an undamped 26 mm slot over two texels is a normal lying
   flat, rendering as a crawling black slit); crown/cavity masks drive wear
   and grime; procedural stencils (part numbers, hazard stripes) into albedo.
4. **Kit** — parametric part builders on a shared profile/loft/box library
   (`Part`-style primitives, per-edge bevel, a material "slot" tag).
5. **Props / assemble** — instantiate every master once, `weld_bevel` each
   with a **hand-tuned width per part class** (finer on small props — a
   2.5 mm round-over eats a 6 mm book board), lay the kit out at its in-game
   transforms *before* baking so occlusion matches what ships.
6. **UV + AO bake**:
   ```python
   def unwrap_and_pack(masters, res=2048):
       for ob in masters.values():   # per-object smart UV project, then:
           ...
       bpy.ops.uv.average_islands_scale()
       bpy.ops.uv.pack_islands(margin=0.006, rotate=True)

   def bake_kit_ao(masters, occ, res=2048, dist=1.5, samples=128):
       sc.cycles.samples = samples
       # AO node -> Emission -> Material Output, per material, bake EMIT
   ```
   **AO bakes along the surface normal — wind kit-hull skin facing INTO the
   room**, or it bakes unoccluded everywhere (open space). **Floor-lift the
   result** — occlusion is a modulation, not a shadow; anything reaching
   pure 0 paints a black line lighting can never recover
   (`a2 = 0.34 + 0.66*a**0.85`).
7. **Clay check** before any texture or bake is trusted (§10).

**Texel density**: panel shipped 2048 px / 2.0 m = **1024 px/m**; deck
1024 px / 1.5 m = **683 px/m**; the interior kit's UV/AO atlas ran at
**4096 px** (the bake function's own default is 2048 — override per project,
don't trust a library default). Pick texel density from viewing distance: a
corridor the player's shoulder passes within 40 cm of needs more than a
ceiling never seen close.

## 5. Rocks and foliage

**Rocks** (`build_rocks.py`): carve, don't deform a sphere — a deformed
icosphere is convex-ish every time (the "potatoes" problem). Instead: dense
icosphere → `bmesh.ops.bisect_plane(..., clear_outer=True)` several times for
fracture faces (family-dependent: slab/block/boulder/column/shard) → smaller
bisects near corners for chips → two octaves of `mathutils.noise.noise`
displacement along the normal → `REMESH` (voxel) to heal cuts into one
manifold → `DECIMATE` to a triangle budget → `shade_smooth_by_angle` so
fracture edges stay sharp → bake AO to a `BYTE_COLOR` vertex attribute
(spread instances apart *before* baking — stacked at the origin they occlude
each other into a mean of 0.2) → normalise so the longest axis is 1 and the
low point sits at 0. Ship **8-11 variants across 3 LODs** (full, ~500 tri,
~160 tri) in one GLB, `export_vertex_color='ACTIVE'`, no materials — AO rides
in `COLOR_0`, the shader supplies the surface.

**Foliage** (`pack_leaf.py`): pack an image-model leaf-cluster cutout (RGBA,
transparent bg) into a 512x512 lossless atlas. Normalise each RGB channel's
mean over opaque pixels to 0.5, so the image contributes *variation about the
palette* rather than its own green. Dilate outward into the transparent
margin — bilinear alpha filtering averages the last opaque texel with its
transparent neighbour, and a black neighbour puts a dark fringe on every
edge. Ten dilation passes covers a 512-texel margin at any mip seen.

## 6. Materials

**Procedural (Cycles-only, geometry-driven):** per-plate tonal variation +
pointiness edge wear, the two nodes that make paint look built:
```python
vor = nt.nodes.new("ShaderNodeTexVoronoi"); vor.inputs["Scale"].default_value = 0.16
# RGBToBW -> MapRange 0.9-1.1 -> Multiply into base colour: plate batches
# never quite match, and that mismatch is most of what reads as "welded".
geo = nt.nodes.new("ShaderNodeNewGeometry")
pr = nt.nodes.new("ShaderNodeMapRange")   # From 0.49-0.56, clamp, -> wear factor
nt.links.new(geo.outputs["Pointiness"], pr.inputs["Value"])
# mix toward bare metal + drive Metallic up: free on every convex corner,
# exactly where paint goes in life.
```
Also: bleach on sun-facing normals (`dot(Normal, sun_dir)`), soot along an
object-space axis. **These do NOT survive glTF export** — three.js never
sees the node graph. Bake to a texture before export, or export flat base
colours per material bucket and let the app's own shader apply bleach/soot
from world position (what the source game does).

**Image-model derived** (ground, cloth, rock faces): one generated albedo is
the only photographic input, everything else *derived* in numpy so it can't
disagree with it:
- `height_from_albedo` — 3 band-passed luminance scales (fine/mid/coarse),
  weighted toward the middle — "dark is deep" is the prior every
  albedo-to-normal tool uses and it holds for ground.
- `normal_from_height` — central difference of the height field.
- `ao_from_height` — horizon-based, 16 directions, cone-stepped march.
- `roughness_heuristic` — dust in cavities (rough), exposed faces polish
  (less rough), clamped to an art-direction matte floor.
- **Seam fix in the gradient domain**, not by blending pixel values: take the
  gradient, force it periodic across the wrap by killing the seam's jump
  over a margin of a few px (weight ramps 0→1 away from the seam), then
  FFT-Poisson-integrate back. Mismatch lands in the lowest-frequency mode
  (an invisible ramp) instead of a visible strip at the border — a wide
  margin instead draws bright bars through the derived occlusion.

An image model asked to paint colour onto a rendered height map **redraws
the geometry** (measured: same style, every stone somewhere else). Asked to
*colourise* a flat, shading-free render of the SAME image, it keeps every
stone in place — colourise, don't paint-over, when height must register to
albedo.

## 7. Lighting and camera

**Void/hero lighting**: one hard key (`SUN`, angle ≈ 0.9°), a large weak
fill tinted toward the key's complement, a cold rim so nothing dissolves
into the background. Shadows never fully black. **Camera on the key side** —
a hero angle from the shadow side is carried by fill and reads washed out.

**Clay/QA lighting** (three `SUN`s: key, rim, bounce from below) — the
bounce matters because half of any interior's surfaces face down (an
overhead console, a coaming's underside) and key+rim alone renders them as
unreadable black.

**Camera from the bounding box, never by hand** — hand-placed cameras end up
inside geometry, costing **80x render time** (near-field bounces: 166 s vs
2 s measured):
```python
pts = [o.matrix_world @ Vector(c) for o in meshes for c in o.bound_box]
lo = Vector((min(p[i] for p in pts) for i in range(3)))
hi = Vector((max(p[i] for p in pts) for i in range(3)))
ctr = (lo + hi) / 2; rad = max((p - ctr).length for p in pts)
cam.location = ctr + direction * (rad / math.tan(cam.data.angle / 2) * 1.05)
cam.rotation_euler = (ctr - cam.location).to_track_quat("-Z", "Y").to_euler()
```
`to_track_quat` assumes Z-up world; if the asset is authored Y-up inside
Blender's Z-up slots, build the look-at basis by hand (cross products off
the target vector and the game's own up axis) or every render is on its side.

**Voronoi stars, never thresholded noise** — noise can't separate density
from size (raise frequency to shrink points → thousands; widen the band to
brighten → falling snow). Voronoi: cell scale = how many, distance threshold
= how big. Cells over a sphere ≈ `4π·scale²`, a frame sees under 1% of it, so
`scale=30` puts ~15 cells in shot — use `scale ≈ 110`. Angular radius =
`threshold / scale`; move both together.

**Backdrop geometry must be camera-visible only.** A large emissive shell
(planet, skybox) hit by diffuse/glossy rays becomes an area light every
shading point importance-samples — measured **145 s → 4.3 s**:
```python
for o in (planet, atmo):
    o.visible_diffuse = o.visible_glossy = o.visible_transmission = False
    o.visible_volume_scatter = o.visible_shadow = False
```

## 8. Export contract for three.js

- **Join per material within each rigid assembly before export.** Keep moving
  doors/drawers, their attachment groups and required named parts separate;
  never merge them into the static carcass just because they share paint.
  One Blender object = one glTF node =
  one draw call. A loose 11-material ship export was 78 draws;
  `bpy.ops.object.join()` per material group brought it to ~11.
- **Metres, Y-up**: `bpy.ops.export_scene.gltf(export_format='GLB',
  use_selection=True, export_apply=True, export_yup=True)`. (The source game
  exports `export_yup=False` because its own runtime is Y-up-in-Blender's-
  Z-up-slots by convention — a plain three.js consumer wants `export_yup=True`.)
- **Flat base colours or baked textures only** — procedural nodes don't
  survive the round trip (§6). `KHR_materials_emissive_strength` DOES
  survive — nav lights, emissive panels keep authored intensity.
- **Draco for real triangle counts**: position 14-bit quantization is ~1 mm
  over a 16 m interior (a tenth of the smallest chamfer), normal 10-bit,
  texcoord 12-bit, compression level 6.
- **WebP out of Blender directly is lossless regardless of the quality
  argument** — its own quality slider is silently ignored. PNG-dump from
  Blender, encode to WebP with PIL on the host if you need real lossy quality.
- **Check draw calls after adding anything** — a duplicated kit piece is one
  draw call against a shared mesh no matter how many times placed; a fresh
  join is not.

## 9. Traps

- Bevel on bmesh-authored geometry does nothing (no shared edges) — weld
  first (§3). `o.scale` then Bevel makes pillows — apply scale first.
- `matrix_parent_inverse = parent.matrix_world.inverted()` cancels the
  parent transform (the "keep transform" idiom). Leave it at identity for
  the child to inherit the parent's rotation.
- A rotation about the wrong axis silently does nothing visible — a panel
  whose normal is +X doesn't change facing when rotated about X. Measure the
  world normal against the view vector rather than reasoning about it.
- Map Range with `To Min > To Max` and clamp on collapses to zero (clamps to
  an inverted interval) — invert with a `SUBTRACT` node instead.
- A Mix node in RGBA mode can silently drop a branch — several sockets share
  the name "Factor". Combine world contributions with two `Background` nodes
  into an `Add Shader` instead.
- The image preview downsamples — 4-px stars average away in a 1080p
  preview. Crop 1:1 and count bright pixels before concluding nothing rendered.
- A tangent-space NORMAL bake off a flat plane records nothing for vertical
  geometry — bake height by ray-traced Emission instead (§4).
- AO bakes along the surface normal — a kit skin wound facing away from the
  room bakes unoccluded everywhere.
- An AO map reaching pure black paints an unrecoverable dark line —
  floor-lift it (§4).
- Blender's WebP writer ignores its own quality setting, always lossless —
  PNG-dump and re-encode on the host (§8).
- Blender exits 0 even when the driven script raised — check stderr and the
  output file, not the return code (§2).
- A socket/exec service keeps Blender's *process* environment between calls
  — a default from a stale env var silently sends output into the wrong
  checkout. Assign output paths explicitly every call, never `setdefault`.

**Blender 5.x API changes** (4.x code fails on all of these):
- `Scene.node_tree` gone → `Scene.compositing_node_group`;
  `CompositorNodeComposite` no longer exists — the group's output socket IS
  the result.
- **The compositing group must contain a `CompositorNodeRLayers`.** Feeding
  it only from a Group Input means nothing depends on the render, so Blender
  skips rendering and writes a transparent black frame in 0.1 s. A
  suspiciously fast render is this bug.
- `Action.fcurves` is gone (slotted actions). Set
  `context.preferences.edit.keyframe_new_interpolation_type` *before*
  inserting keys.
- Glare/Lensdist settings moved from properties onto **sockets**; enums take
  display names (`"Fog Glow"`, `"Streaks"`, `"High"`), not old identifiers.
- Legacy addons still install to `~/Library/.../Blender/<ver>/scripts/addons/`
  on macOS — irrelevant on gex44, relevant for local proving.

## 10. Gates (measurable, not "looks right")

- **Independent export audit**: run
  `python3 scripts/audit_glb.py /absolute/path/asset.glb --strict` from this skill
  directory (requires numpy). It reports mesh-local triangles, nonfinite values,
  degenerate triangles, material groups and texture portability. Exit 1 means
  findings; exit 2 means invalid/unsupported input, never a clean bill of health.
  Audit uncompressed output before Draco/meshopt and inspect the compressed
  consumer separately. It does not validate winding, source solids, intersections,
  node-transformed placement, runtime draw calls or gameplay. Keep source meshes
  for topology/volume inspection; check transformed instance bounds in-game.
  The harbour correction's own empty issues list missed 16 zero-area triangles.

- **Rigged-asset rejection gates** (block the asset before it reaches a build; each one is a
  known failure class):
  - a character MAIN model still contains swappable gear (gear is separate parts on sockets);
  - action/animation files carry duplicate render meshes;
  - skeletons or bone names differ across actions of the same character;
  - a required role, socket (`target`, `ground`, `vfx-hit`, `vfx-death`, `attack-*`), collider,
    equipment-slot declaration or provenance field is absent;
  - toggling gear leaves visible fragments or holes without a declared underlayer boundary;
  - an attack animation has no authoritative timing and collision contract (see
    `_game-kit/core/ENEMY-CONTRACT.md`);
  - status language is truthful: `catalog-only` (recorded), `review-only` (inspector exists),
    `runtime` (gameplay loads it). Only `runtime` counts as shipped.
  Mechanical half: `audit_glb.py --rig --require-sockets target,ground,vfx-hit,vfx-death` reports
  skins, joint names, duplicate primitives (identical geometry buffers) and missing named nodes.
  Design after MengTo/Skills build-rigged-game-assets requirements (MIT); the human half stays a
  checklist.
- **Tone stats**: percentile clipping, e.g. "0.00% of pixels clip and the
  99th percentile is 165" — actionable; "looks flat" is not.
- **Contact sheets**: render every set-piece/angle into one grid image,
  judge the set at once rather than one screenshot at a time.
- **Clay check before any bake is trusted**: flat grey, hard key + rim +
  bounce, no textures, no emissives. A silhouette reading as a rectangle or
  an edge reading as infinitely sharp means the model isn't finished —
  textures and lighting hide box-stacking completely, flat clay does not.
- **Re-verify the capture isn't stale**: if the render/dev surface can
  hot-reload mid-capture, re-check the expected state is actually showing
  before saving, restart if not — a loading-state screenshot with a
  plausible number next to it is a silent false pass.
- **Draw-call and fps survey** after adding any asset: report draw count
  against the pre-change baseline (join-per-material should hold it flat)
  and frame time on the heaviest scene the asset appears in.
- **AO sanity**: print the raw bake's percentile spread (1st/10th/50th/90th)
  before floor-lifting — `min == 0` over a large area means winding or
  distance is wrong, not that floor-lift will fix it.
- Numbers not yet measured on gex44/RTX 4000 Ada (draft/final render time,
  bake time for a 4096 atlas): **unmeasured** — get one real run's numbers
  before writing them into a plan or a budget.

## Attribution

Distilled from TheLongSilence (MIT License, Copyright (c) 2026 Anshu
Chimala). Runnable reference code copied under the same license into
`reference/` — see `reference/INDEX.md`.

`reference/high-to-low-baking.md`, `baking-and-diagnostics.md`, `asset-delivery.md`,
`preflight-and-recovery.md` and `runtime-parity-and-diagnostics.md` are ported from
vercel-labs/vgpu `skills/vgpu/blender/references/` at commit 68cb1d8d198c (MIT License,
Copyright (c) 2025 Vercel, Inc.), adapted from vgpu/WebGPU to the three.js runtime.
`reference/critic-loop.md` is distilled from the same repository's asset agent flow.

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/home/claude-agent/forge-build/forge-assets/site/shots/st5-before-window-pane.jpg
/home/claude-agent/forge-build/forge-assets/site/shots/st5-bakery.jpg
/home/claude-agent/forge-build/forge-assets/site/shots/st7-village-aerial.jpg
/home/claude-agent/forge-build/forge-assets/site/shots/before-after.jpg
/home/claude-agent/forge-build/forge-assets/site/shots/st3-church-quoins.jpg
/home/claude-agent/forge-build/forge-assets/site/shots/st5-barn.jpg
/home/claude-agent/forge-build/forge-assets/site/shots/st9-roof-glitter.jpg

codex
I’m using the blender-game-assets skill. The reference’s key proportions are the tall, slightly tapered armour body, low recessed tracks, and small central cab. I’ll preserve the turretless layout; the cab will carry the turret-named damage sockets required by the library contract.

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exec
/bin/bash -lc "coord claim local:/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/ --note 'A7V asset build'; coord check gex44:/root/fal-author/a7v-tank-v1/; coord claim gex44:/root/fal-author/a7v-tank-v1/ --note 'A7V Blender build'; date -u '+%F %T'; for p in /home/claude-agent/forge-build/AGENTS.md /home/claude-agent/forge-build/forge-assets/AGENTS.md /home/claude-agent/forge-build/forge-assets/jobs/AGENTS.md; do if test -f \""'$p"; then cat "$p"; fi; done' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
claim local:/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/ [exclusive] ttl=1800s
clear    gex44:/root/fal-author/a7v-tank-v1/
claim gex44:/root/fal-author/a7v-tank-v1/ [exclusive] ttl=1800s
2026-10-11 16:19:54

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exec
/bin/bash -lc 'cat /home/claude-agent/.agents/skills/blender-game-assets/reference/preflight-and-recovery.md' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
<!-- Ported from vercel-labs/vgpu skills/vgpu/blender/references/preflight-and-recovery.md at commit 68cb1d8d198c (MIT, Copyright (c) 2025 Vercel, Inc.). Adapted for Forge: three.js runtime instead of vgpu/WebGPU, links rerouted. Upstream text otherwise kept so a re-sync stays diffable. -->

# Preflight and Recovery

Use this workflow for long bakes and scripted asset delivery. Keep a short manual edit lightweight; add checkpoints where repeating expensive work or confusing stale output is a real risk. These are asset execution requirements, independent of how many people or agents perform the work.

## Exercise the actual execution path first

Before an expensive run, provide and run a task-local preflight command using the same executable, working directory, dependency environment and helper paths as the intended run. Reuse existing project checks where possible. A version query or import from another directory is not an execution probe.

- Start native Blender (gex44 path and GPU gate wrapper: `SKILL.md` §2) and execute a minimal scene operation through Python. For scripted runs, use `--python-exit-code 1`; inspect logs and the expected output, not exit status alone.
- Exercise the chosen render/bake device with a tiny representative bake, then export, encode/decode and import a small fixture through the actual exporter and runtime loader. Await codec initialization. Resolve copied Node helpers from their real execution directory and module mode; a successful ESM import does not establish that a copied CommonJS helper can resolve its dependencies.
- Classify required and optional inputs before baking. Verify required files, codecs, writable output paths and capture dependencies. Missing optional metadata must have a documented fallback or be omitted deliberately, not fail final assembly after a completed bake.
- Capture and read one real target-renderer frame with the intended browser/image tools. Record the actual backend; a fallback renderer does not validate the requested backend. This probe establishes that the tools work, not final visual quality.

If a probe fails, fix or report that boundary before starting dependent expensive work. Do not keep retrying the unchanged failure. If sources may change during a run, execute an immutable snapshot including local imports; record external dependencies and verify snapshot hashes at completion.

## Keep stages independently recoverable

Give expensive stages explicit commands, inputs, outputs and validation. A task-local script may expose subcommands or separate entry points; no particular build framework is required. Do not force a bake when that asset does not need one.

| Stage | Evidence needed before its outputs can be reused |
| --- | --- |
| Prepare | Saved source/LOW checkpoint, resolved transforms and reproducible parameters |
| Validate geometry | Openings, contacts, normals and UV checks on evaluated/exported LOW; simple-material views, including relevant LODs |
| Bake | Lossless masters, actual pass settings and dependency identities, coverage and representative pixel checks |
| Export | Decodable serialized meshes, map/UV bindings and measured counts; reconcile exporter changes with prepared geometry |
| Package | Required files, decoded texture error, channels/mips and delivery manifest with hashes |
| Verify runtime | Actual target-backend captures from matched cameras, independent map toggles, measured costs and renderer errors |

For each attempt, save the exact command, input/dependency hashes, tool identities, exit outcome, output hashes, validation results and failure reason. Mark a stage complete only after its outputs pass its checks. Keep failed attempts and logs distinct from completed checkpoints. File existence or a successful process alone is not proof of completion.

On retry, start at the earliest invalid stage and revalidate dependent outputs. If packaging fails after a verified bake/export, resume packaging from those artifacts; do not regenerate the scene merely to rerun a copy step. When geometry, normals or lighting change, use the [bake dependency rules](baking-and-diagnostics.md#reuse-bakes-by-their-dependencies) to decide which passes need new identities.

## Validate a candidate before replacing delivery assets

Keep candidate assets separate from the last working delivery. Verify the candidate manifest and served build/asset identities before capture; avoid a preview that silently loads missing files from the old asset set. Promote only the validated files together with their matching manifest, retain a recoverable previous version, and smoke-check the delivered URL after replacement. Report whether the replacement is atomic; per-file writes do not make the whole asset set atomic.

Checks establish structural and runtime evidence, not aesthetic acceptance. Pair them with the matched visual review in [the critic loop](critic-loop.md) and the gates in `SKILL.md` §10.

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/bin/bash -lc "ssh gex44 'mkdir -p /root/fal-author/a7v-tank-v1; nvidia-smi --query-gpu=name,memory.free --format=csv,noheader'; python3 - <<'PY'
import urllib.request,json
j=json.load(urllib.request.urlopen('https://api.polyhaven.com/assets?t=textures'))
print([k for k in j if any(t in k for t in ['metal','rust','paint'])])
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 exited 1 in 864ms:
NVIDIA RTX 4000 SFF Ada Generation, 8800 MiB
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/usr/lib/python3.12/urllib/request.py", line 215, in urlopen
    return opener.open(url, data, timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/urllib/request.py", line 521, in open
    response = meth(req, response)
               ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/urllib/request.py", line 630, in http_response
    response = self.parent.error(
               ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/urllib/request.py", line 559, in error
    return self._call_chain(*args)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/urllib/request.py", line 492, in _call_chain
    result = func(*args)
             ^^^^^^^^^^^
  File "/usr/lib/python3.12/urllib/request.py", line 639, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 403: Forbidden

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exec
/bin/bash -lc "curl -L -A 'Mozilla/5.0' -s -o /tmp/a7v-polyhaven-assets.json -w '%{http_code}\\n' 'https://api.polyhaven.com/assets?t=textures'; python3 - <<'PY'
import json
try:
 j=json.load(open('/tmp/a7v-polyhaven-assets.json'));print([k for k in j if any(t in k for t in ['metal','rust','paint'])])
except Exception as e: print(type(e).__name__)
PY
ssh gex44 \"curl -L -s -A 'Mozilla/5.0' -o /root/fal-author/a7v-tank-v1/ph-assets.json -w '%{http_code}\\n' 'https://api.polyhaven.com/assets?t=textures'\"" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 789ms:
200
['black_painted_planks', 'blue_metal_plate', 'blue_painted_planks', 'box_profile_metal_sheet', 'concrete_floor_painted', 'distressed_painted_planks', 'green_metal_rust', 'metal_grate_rusty', 'metal_plate', 'metal_plate_02', 'painted_brick', 'painted_concrete', 'painted_concrete_02', 'painted_metal_shutter', 'painted_plaster_wall', 'painted_worn_brick', 'peeling_painted_wall', 'rust_coarse_01', 'rusted_shutter', 'rustic_stone_wall', 'rustic_stone_wall_02', 'rusty_corrugated_iron', 'rusty_metal', 'rusty_metal_02', 'rusty_metal_03', 'rusty_metal_04', 'rusty_metal_05', 'rusty_metal_grid', 'rusty_metal_sheet', 'rusty_metal_shutter', 'rusty_painted_metal', 'wood_peeling_paint_weathered']
200

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/bin/bash -lc 'ls -la; cat /home/claude-agent/.agents/skills/blender-game-assets/reference/critic-loop.md' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
total 860
drwxrwxr-x  2 claude-agent claude-agent   4096 Oct 11 16:19 .
drwxrwxr-x 94 claude-agent claude-agent   4096 Oct 11 15:29 ..
-rw-rw-r--  1 claude-agent claude-agent  11529 Oct 11 16:19 PROMPT.txt
-rw-rw-r--  1 claude-agent claude-agent 119189 Oct 11 16:20 astra.log
-rw-rw-r--  1 claude-agent claude-agent   9233 Oct 11 15:20 job.json
-rw-rw-r--  1 claude-agent claude-agent 711334 Oct 11 15:22 sheet.jpg
-rw-rw-r--  1 claude-agent claude-agent     43 Oct 11 15:22 sheet.log
-rw-rw-r--  1 claude-agent claude-agent    879 Oct 11 15:20 sheet_prompt.txt
-rw-rw-r--  1 claude-agent claude-agent     21 Oct 11 16:19 started.txt
<!-- Distilled from vercel-labs/vgpu .claude/skills/vgpu-agent-flow/references/asset-iteration.md and
.subharness/agents/asset-author.ts + asset-critic.ts at commit 68cb1d8d198c (MIT, Copyright (c) 2025 Vercel, Inc.),
rewritten for Forge lanes (forge-agent, Astra author, a second model family as critic). -->

# Author and critic loop for a Blender asset

Use this for any authored asset that will be judged by eye: a hero prop, a character, a building, an
environment. Skip it for a mechanical re-export.

## Seats

| Seat | Who | Owns |
| --- | --- | --- |
| Author | Astra (operator law: Blender work goes to Astra) | Geometry, authored materials, UVs, bakes, Blender renders, the export |
| Runtime | The root, or one worker when the shader work is real | Loading the export in the game's actual three.js path, captures, measured costs |
| Critic | A different model family from the author, reading the real images | Findings only. Never edits the asset |

The critic must open the actual capture files. A critic that cannot read images says so and returns
BLOCKED; it never writes a visual verdict from metrics or from the author's description.

## Budget

- Default: **3 revisions, at most 2 critic passes per revision.** The brief may set another cap.
- A cap is an execution limit, not acceptance. Cap reached with open visual findings = `REVISE`
  reported as such, never a `PASS`.
- No unattended improvement loop past the cap.

## Before the first render

Write in the task folder: scope, target cameras (gameplay view, hero, rear, closest required view),
output paths, budgets (triangles, exported vertices, texture bytes and GPU memory, draw calls) and
the revision cap. Budgets are task inputs; do not copy another asset's numbers.

Run the [preflight](preflight-and-recovery.md) once: Blender starts and runs a scene operation, a
tiny bake and export round-trips through the real loader, one real runtime frame is captured.

Integrate a cheap LOW blockout in the runtime at this stage. Scale, axis, camera and material
contract problems are found before an expensive bake, not after.

## Each revision keeps

- the source revision or parameters that rebuild the previous asset;
- real hero, rear and close-up captures, same camera, light, exposure and pose every time;
- triangles, exported vertices, primitives, material count, file bytes, texture GPU memory;
- runtime draw counters, kept apart from offline estimates;
- the critic's findings, the fixes chosen, and the next measured result.

## The critic pass

The critic receives the previous AND the current captures and metrics under matched cameras (or
an explicit "first revision, no baseline"), the reference image, and the brief. It returns:

- **at most five findings**, ordered by impact, each with a stable id, the evidence path (whole
  view plus crop or image coordinates), the visible symptom, a suggested correction and a
  **measurable acceptance condition**;
- regressions against the previous revision;
- resolved / remaining / regressed status of earlier findings on a follow-up pass;
- `PASS`, `REVISE` or `BLOCKED`, with the limits of its evidence.

It compares against the reference as well as the previous revision: clean topology and progress
since last time do not make the asset match the reference. It separates the observed defect from
the suspected cause. A small whole-image difference can hide severe local damage (thin trim,
stairs, silhouette edges): it inspects crops at each delivered LOD. Design ideas are suggestions,
not new acceptance requirements.

When the cause could be the asset or the renderer, it asks for the diagnostic captures in
[runtime parity](runtime-parity-and-diagnostics.md) (maps off, AO neutral, lightmap off) rather
than guessing.

## Rules that stop false passes

- A generated concept image is never proof of a working model. Label concepts as concepts; accept
  only on real renders of the real export.
- Requested bakes need bake provenance (what was baked, from what, at what settings) and matched
  runtime captures with each contribution switched off in turn. Vertex tint and runtime shadows
  are not substitutes for a requested AO or lightmap bake.
- An atlas repair is checked on the full matched views, not only on the crop that was broken: a new
  layout can fix one edge and turn another face black.
- One writer per handoff file. A reply never gets appended to a request file another agent will
  regenerate. Superseded manifests and failed captures stay on disk.
- The author hands the root a compact result: verdict, the few decisive images, the metrics table.
  Full capture sets stay on disk; the root does not load every image.
- A user's rejection or a changed brief reopens any earlier `PASS`.

## Lessons

When a revision teaches something that will recur, write it as: evidence path, symptom, cause,
intervention, matched before/after result, scope. The root checks it and makes a narrow edit to this
skill. Reject task-specific style preferences dressed up as general rules.

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/bin/bash -lc "cat > /tmp/a7v-preflight.py <<'PY'
import bpy
from pathlib import Path
bpy.ops.wm.read_factory_settings(use_empty=True)
s=bpy.context.scene;s.render.engine='CYCLES';s.cycles.samples=1
p=bpy.context.preferences.addons['cycles'].preferences;p.compute_device_type='OPTIX';p.get_devices()
for d in p.devices:d.use=d.type=='OPTIX'
s.cycles.device='GPU'
bpy.ops.mesh.primitive_plane_add();o=bpy.context.object
m=bpy.data.materials.new('probe');m.use_nodes=True;o.data.materials.append(m)
i=bpy.data.images.new('probe',32,32);n=m.node_tree.nodes.new('ShaderNodeTexImage');n.image=i;m.node_tree.nodes.active=n
bpy.ops.object.bake(type='DIFFUSE',pass_filter={'COLOR'})
bpy.ops.export_scene.gltf(filepath='/root/fal-author/a7v-tank-v1/probe.glb',export_format='GLB',use_selection=True)
bpy.ops.object.delete(use_global=False)
bpy.ops.import_scene.gltf(filepath='/root/fal-author/a7v-tank-v1/probe.glb')
print('PREFLIGHT_OK',len(bpy.context.scene.objects))
PY
scp /tmp/a7v-preflight.py gex44:/root/fal-author/a7v-tank-v1/preflight.py
ssh gex44 '/root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/preflight.py' > /tmp/a7v-preflight.log 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 2695ms:
codex
I’ve checked the reference and found suitable Poly Haven metal scans. I’m building real panel seams, rivet rows, recessed gun ports, and the running gear beneath the removable skirts. The source script will also bake shared textures so the weathering survives export and paint recolouring.

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exec
/bin/bash -lc "tail -8 /tmp/a7v-preflight.log; cat > BUILD_SCOPE.md <<'EOF'
A7V reconstruction from sheet.jpg; metres, Blender -Y forward / glTF +Z forward. Authoring began 11 October 2026 18:19 CEST; checkpoint 19:34 CEST.
Deliver healthy and turretless damage GLBs, single clean build script, node/paint/damage manifest, six-line notes, hero/side/clay and paint/state grids. No insignia.
Targets: 80–140k healthy triangles; <=110k damage; <=10 materials; <=12 MB each; maps <=1024, ORM <=512. Preserve individual moving pivots and removable parts.
Hero front-left three-quarter, orthographic side, grey clay; proof grids from exported GLBs. Up to three visual revisions.
Turretless exceptions: no Turret or Wreck_Turret; Turret_Damage is at ground origin and holds roof-cab scars. Eight MGs honor three per side plus two rear (MG_1..MG_8).
EOF" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
18:20:34 | INFO: Finished glTF 2.0 export in 0.0060138702392578125 s

18:20:34 | INFO: Data are loaded, start creating Blender stuff
18:20:34 | INFO: Blender create Mesh node Plane
18:20:34 | INFO: glTF import finished in 0.00s
PREFLIGHT_OK 1

Blender quit

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exec
/bin/bash -lc "cat > build_a7v-tank.py <<'PY'
\"\"\"A7V game asset. Blender 5.2: -b --python-exit-code 1 --python build_a7v-tank.py
Clean build includes CC0 downloads, Cycles GPU material bakes, two exports and import proofs.
Authoring coordinates: X left, -Y forward, Z up. glTF conversion produces X left,Y up,Z forward.
\"\"\"
import bpy, bmesh, math, os, json, random, struct, urllib.request, sys
from pathlib import Path
from mathutils import Vector, Matrix
from math import sin,cos,pi
import numpy as np
ROOT=Path(__file__).resolve().parent
TEX=ROOT/'textures'; TEX.mkdir(exist_ok=True)
random.seed(74)
bpy.ops.wm.read_factory_settings(use_empty=True)
S=bpy.context.scene;S.unit_settings.system='METRIC';S.render.engine='CYCLES'
S.cycles.samples=24;S.cycles.use_denoising=True
prefs=bpy.context.preferences.addons['cycles'].preferences
prefs.compute_device_type='OPTIX';prefs.get_devices()
for dev in prefs.devices:dev.use=dev.type=='OPTIX'
S.cycles.device='GPU';S.cycles.bake_type='EMIT'
S.render.image_settings.file_format='PNG';S.view_settings.view_transform='AgX'
PAINTS=[('field grey',[.19,.22,.19]),('olive drab',[.20,.22,.10]),('desert tan',[.55,.42,.26]),('winter white',[.78,.79,.73]),('dark green-black',[.055,.075,.06]),('panzer grey',[.115,.135,.15])]
IDS=['metal_plate','rusty_metal_03']
def fetch(url,path):
 if not path.exists():
  req=urllib.request.Request(url,headers={'User-Agent':'Mozilla/5.0'})
  with urllib.request.urlopen(req,timeout=90) as r:path.write_bytes(r.read())
for ident in IDS:
 for mp in ['diff','nor_gl','arm']:
  p=TEX/f'{ident}_{mp}_1k.jpg'
  fetch(f'https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/{ident}/{ident}_{mp}_1k.jpg',p)
print('TEXTURES_READY',flush=True)
MATS={};BAKES=[]
def texture(nt,path,noncolor=False):
 n=nt.nodes.new('ShaderNodeTexImage');n.image=bpy.data.images.load(str(path),check_existing=True)
 if noncolor:n.image.colorspace_settings.name='Non-Color'
 return n

def make_mat(name,colour,metal,rough,ident='metal_plate',res=512):
 # Bake a shared 2 m tiling/trim swatch; geometry uses metre-scaled UVs.
 m=bpy.data.materials.new(name);m.use_nodes=True;nt=m.node_tree;nt.nodes.clear();lk=nt.links
 out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs['Surface'])
 uv=nt.nodes.new('ShaderNodeTexCoord');diff=texture(nt,TEX/f'{ident}_diff_1k.jpg');norm=texture(nt,TEX/f'{ident}_nor_gl_1k.jpg',True);arm=texture(nt,TEX/f'{ident}_arm_1k.jpg',True)
 for n in [diff,norm,arm]:lk.new(uv.outputs['UV'],n.inputs['Vector'])
 bw=nt.nodes.new('ShaderNodeRGBToBW');lk.new(diff.outputs['Color'],bw.inputs[0])
 ramp=nt.nodes.new('ShaderNodeValToRGB');ramp.color_ramp.elements[0].position=.08;ramp.color_ramp.elements[1].position=.8
 if name=='Paint':lo=(.46,.46,.45,1);hi=(.94,.95,.94,1)
 else:lo=(*[c*.40 for c in colour],1);hi=(*[min(1,c*1.6) for c in colour],1)
 ramp.color_ramp.elements[0].color=lo;ramp.color_ramp.elements[1].color=hi;lk.new(bw.outputs[0],ramp.inputs[0])
 mapping=nt.nodes.new('ShaderNodeVectorMath');mapping.operation='MULTIPLY';mapping.inputs[1].default_value=(48,2.3,1);lk.new(uv.outputs['UV'],mapping.inputs[0])
 noise=nt.nodes.new('ShaderNodeTexNoise');noise.inputs['Scale'].default_value=4;noise.inputs['Detail'].default_value=3;lk.new(mapping.outputs[0],noise.inputs['Vector'])
 grime=nt.nodes.new('ShaderNodeValToRGB');grime.color_ramp.elements[0].position=.25;grime.color_ramp.elements[0].color=(.45,.45,.44,1);grime.color_ramp.elements[1].position=.62;grime.color_ramp.elements[1].color=(1,1,1,1);lk.new(noise.outputs['Fac'],grime.inputs[0])
 mix=nt.nodes.new('ShaderNodeMixRGB');mix.blend_type='MULTIPLY';mix.inputs[0].default_value=.42;lk.new(ramp.outputs['Color'],mix.inputs[1]);lk.new(grime.outputs['Color'],mix.inputs[2]);lk.new(mix.outputs[0],p.inputs['Base Color'])
 nm=nt.nodes.new('ShaderNodeNormalMap');nm.inputs['Strength'].default_value=.24 if name=='Paint' else .42;lk.new(norm.outputs[0],nm.inputs['Color']);lk.new(nm.outputs[0],p.inputs['Normal'])
 sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(arm.outputs[0],sep.inputs[0])
 rr=nt.nodes.new('ShaderNodeMapRange');rr.inputs['To Min'].default_value=max(.42,rough-.12);rr.inputs['To Max'].default_value=min(.98,rough+.12);lk.new(sep.outputs[1],rr.inputs[0]);lk.new(rr.outputs[0],p.inputs['Roughness']);p.inputs['Metallic'].default_value=metal
 bpy.ops.mesh.primitive_plane_add(size=2);o=bpy.context.object;o.name='BakeFixture';o.data.materials.append(m)
 active=nt.nodes.new('ShaderNodeTexImage');nt.nodes.active=active
 emit=nt.nodes.new('ShaderNodeEmission')
 baked={}
 for mode,sz in [('base',res),('normal',res),('orm',512)]:
  im=bpy.data.images.new(name+'_'+mode,width=sz,height=sz,alpha=False)
  if mode"'!='"'base':im.colorspace_settings.name='Non-Color'
  active.image=im;nt.nodes.active=active
  if mode=='base':
   lk.new(mix.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT')
  elif mode=='normal':
   lk.new(p.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='NORMAL')
  else:
   comb=nt.nodes.new('ShaderNodeCombineColor');comb.inputs[0].default_value=1;comb.inputs[2].default_value=metal;lk.new(rr.outputs[0],comb.inputs[1]);lk.new(comb.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT')
  im.filepath_raw=str(TEX/f'{name}_{mode}.png');im.file_format='PNG';im.save();baked[mode]=im
 bpy.data.objects.remove(o,do_unlink=True)
 nt.nodes.clear();out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs[0])
 bn=nt.nodes.new('ShaderNodeTexImage');bn.image=baked['base'];nn=nt.nodes.new('ShaderNodeTexImage');nn.image=baked['normal'];on=nt.nodes.new('ShaderNodeTexImage');on.image=baked['orm']
 if name=='Paint':
  mul=nt.nodes.new('ShaderNodeMixRGB');mul.name='PaintFactor';mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*PAINTS[0][1],1);lk.new(bn.outputs[0],mul.inputs[1]);lk.new(mul.outputs[0],p.inputs['Base Color'])
 else:lk.new(bn.outputs[0],p.inputs['Base Color'])
 normal=nt.nodes.new('ShaderNodeNormalMap');lk.new(nn.outputs[0],normal.inputs[0 if False else 'Color']);lk.new(normal.outputs[0],p.inputs['Normal'])
 sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(on.outputs[0],sep.inputs[0]);lk.new(sep.outputs[1],p.inputs['Roughness']);lk.new(sep.outputs[2],p.inputs['Metallic'])
 # Exporter-supported occlusion group.
 group=bpy.data.node_groups.get('glTF Material Output')
 if not group:
  group=bpy.data.node_groups.new('glTF Material Output','ShaderNodeTree');group.interface.new_socket(name='Occlusion',in_out='INPUT',socket_type='NodeSocketFloat')
 gn=nt.nodes.new('ShaderNodeGroup');gn.node_tree=group;lk.new(sep.outputs[0],gn.inputs['Occlusion'])
 if name=='Lamps':p.inputs['Emission Color'].default_value=(.55,.39,.19,1);p.inputs['Emission Strength'].default_value=.1
 MATS[name]=m;BAKES.append({'material':name,'colour_normal':res,'ORM':512,'device':'OPTIX','passes':['EMIT base','NORMAL tangent','EMIT ORM'],'source':ident})
 print('BAKED',name,flush=True)
for args in [('Paint',(1,1,1),.12,.82,'metal_plate',1024),('TrackSteel',(.13,.12,.10),.78,.68,'rusty_metal_03',512),('Rubber',(.026,.025,.023),.03,.94,'metal_plate',512),('Weapons',(.11,.12,.115),.82,.43,'metal_plate',512),('Rust',(.19,.085,.047),.50,.79,'rusty_metal_03',512),('Interior',(.018,.02,.018),.1,.91,'metal_plate',512),('Lamps',(.65,.56,.37),.3,.32,'metal_plate',512),('Burnt',(.075,.07,.064),.35,.94,'rusty_metal_03',512),('Scars',(.31,.29,.25),.8,.63,'rusty_metal_03',512)]:make_mat(*args)
MATLIST=list(MATS.values());MI={m.name:i for i,m in enumerate(MATLIST)}
# Batched parametric geometry. Separate rigid/moving assemblies preserve pivots.
CACHE={}
def box_template(size,bev):
 key=(tuple(round(x,5) for x in size),round(bev,5))
 if key in CACHE:return CACHE[key]
 bm=bmesh.new();bmesh.ops.create_cube(bm,size=1)
 for v in bm.verts:v.co.x*=size[0];v.co.y*=size[1];v.co.z*=size[2]
 if bev:bmesh.ops.bevel(bm,geom=list(bm.edges),offset=bev,segments=2,affect='EDGES',clamp_overlap=True)
 bm.verts.ensure_lookup_table();bm.verts.index_update();v=[tuple(v.co) for v in bm.verts];f=[[v.index for v in p.verts] for p in bm.faces];bm.free();CACHE[key]=(v,f);return v,f
class Build:
 def __init__(self):self.v=[];self.f=[];self.mi=[];self.smooth=[];self.uv=[]
 def add(self,verts,faces,mat='Paint',smooth=False,uv=None):
  off=len(self.v);self.v.extend([tuple(v) for v in verts]);self.f.extend([[off+i for i in f] for f in faces]);self.mi.extend([MI[mat]]*len(faces));self.smooth.extend([smooth]*len(faces));self.uv.extend(uv if uv else [None]*len(faces))
 def box(self,c,d,mat='Paint',bev=.009,rot=None):
  v,f=box_template(d,bev);R=rot or Matrix.Identity(3);self.add([R@Vector(p)+Vector(c) for p in v],f,mat)
 def cyl(self,a,b,r,mat='Weapons',n=16,r2=None):
  a,b=Vector(a),Vector(b);q=(b-a).to_track_quat('Z','Y');r2=r if r2 is None else r2
  verts=[a+q@Vector((r*cos(2*pi*i/n),r*sin(2*pi*i/n),0)) for i in range(n)]+[b+q@Vector((r2*cos(2*pi*i/n),r2*sin(2*pi*i/n),0)) for i in range(n)]
  fs=[list(reversed(range(n))),list(range(n,2*n))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)];self.add(verts,fs,mat,True)
 def rivet(self,p,normal,r=.021,mat='Paint'):
  p=Vector(p);q=Vector(normal).to_track_quat('Z','Y');n=8
  vv=[p+q@Vector((r*cos(i*2*pi/n),r*sin(i*2*pi/n),.001)) for i in range(n)]
  vv += [p+q@Vector((r*.78*cos(i*2*pi/n),r*.78*sin(i*2*pi/n),r*.65)) for i in range(n)]
  vv += [p+q@Vector((0,0,r*.88))]
  ff=[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)]+[[i+n,(i+1)%n+n,2*n] for i in range(n)];self.add(vv,ff,mat,True)
 def tube(self,points,r,mat='Rust',n=12):
  points=[Vector(p) for p in points];vv=[]
  for i,p in enumerate(points):
   tangent=points[min(i+1,len(points)-1)]-points[max(0,i-1)];q=tangent.to_track_quat('Z','Y')
   vv += [p+q@Vector((r*cos(j*2*pi/n),r*sin(j*2*pi/n),0)) for j in range(n)]
  ff=[]
  for i in range(len(points)-1):
   for j in range(n):ff.append([i*n+j,i*n+(j+1)%n,(i+1)*n+(j+1)%n,(i+1)*n+j])
  ff += [list(reversed(range(n))),list(range((len(points)-1)*n,len(points)*n))];self.add(vv,ff,mat,True)
 def torus(self,c,major,minor,axis=(1,0,0),mat='TrackSteel',n=24,k=6):
  q=Vector(axis).to_track_quat('Z','Y');vv=[]
  for i in range(n):
   for j in range(k):
    a=i*2*pi/n;b=j*2*pi/k;vv.append(Vector(c)+q@Vector(((major+minor*cos(b))*cos(a),(major+minor*cos(b))*sin(a),minor*sin(b))))
  self.add(vv,[[i*k+j,((i+1)%n)*k+j,((i+1)%n)*k+(j+1)%k,i*k+(j+1)%k] for i in range(n) for j in range(k)],mat,True)
 def plate(self,points,thick=.035,mat='Paint'):
  ps=[Vector(p) for p in points];normal=(ps[1]-ps[0]).cross(ps[2]-ps[0]).normalized();n=len(ps)
  self.add(ps+[p-normal*thick for p in ps],[list(range(n)),list(reversed(range(n,2*n)))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)],mat)
 def object(self,name,pivot=(0,0,0)):
  me=bpy.data.meshes.new(name);me.from_pydata([Vector(p)-Vector(pivot) for p in self.v],[],self.f);me.update()
  ob=bpy.data.objects.new(name,me);S.collection.objects.link(ob);ob.location=pivot
  for m in MATLIST:me.materials.append(m)
  uv=me.uv_layers.new(name='UVMap')
  for poly,mi,sm,custom in zip(me.polygons,self.mi,self.smooth,self.uv):
   poly.material_index=mi;poly.use_smooth=sm
   normal=poly.normal;axis=max(range(3),key=lambda i:abs(normal[i]))
   for j,li in enumerate(poly.loop_indices):
    v=Vector(self.v[me.loops[li].vertex_index])
    if custom:coord=custom[j]
    elif axis==0:coord=(v.y*.48,(v.z-.5)*.48)
    elif axis==1:coord=(v.x*.48,(v.z-.5)*.48)
    else:coord=(v.x*.48,v.y*.48)
    uv.data[li].uv=coord
  return ob

def empty(name,p,parent=None):
 o=bpy.data.objects.new(name,None);S.collection.objects.link(o);o.location=p
 if parent:parent_keep(o,parent)
 return o
def parent_keep(o,p):
 bpy.context.view_layer.update();mw=o.matrix_world.copy();o.parent=p;o.matrix_world=mw

def origin_center(o):
 if o.type"'!='"'MESH':return
 c=sum((v.co for v in o.data.vertices),Vector())/len(o.data.vertices);o.data.transform(Matrix.Translation(-c));o.location+=c
 return o
H=Build();parts=[];healthy=[];wheels=[];hatches=[]
def part(b,name,pivot=None):
 o=b.object('Part_'+name,pivot or (0,0,0))
 if pivot is None:origin_center(o)
 parts.append(o);return o
# Armour: lower edge flares outward, upper shoulders taper inward.
def sx(z):return 1.48-(z-.65)*.10
# Main side plate strips with actual seam gaps over a complete interior underlayer.
sideYs=[-3.27,-2.23,-1.08,.02,1.10,2.22,3.27]
def roof(y):return 2.77-.065*max(0,abs(y)-.55)
for s in [-1,1]:
 H.plate([(s*sx(.64),-3.28,.64),(s*sx(.64),3.28,.64),(s*sx(2.60),3.18,2.60),(s*sx(2.60),-3.18,2.60)],.055)
 for j,(a,b) in enumerate(zip(sideYs,sideYs[1:])):
  # fitted upper panels and six detachable lower plates per side
  za,zb=roof(a),roof(b)
  H.plate([(s*(sx(1.10)+.009),a+.004,1.10),(s*(sx(1.10)+.009),b-.004,1.10),(s*(sx(zb)+.009),b-.004,zb),(s*(sx(za)+.009),a+.004,za)],.035)
  B=Build();B.plate([(s*(sx(.64)+.018),a+.008,.64),(s*(sx(.64)+.018),b-.008,.64),(s*(sx(1.11)+.022),b-.008,1.11),(s*(sx(1.11)+.022),a+.008,1.11)],.04)
  for yy in [a+.11,b-.11]:
   for zz in [.74,1.01]:B.rivet((s*(sx(zz)+.024),yy,zz),(s,0,.1),.022)
  part(B,f'Skirt_{\"L\" if s>0 else \"R\"}{j+1}')
  for yy in [a+.055,b-.055]:
   for k in range(11):
    z=1.14+k*(min(za,zb)-1.23)/10;H.rivet((s*(sx(z)+.027),yy,z),(s,0,.10),.019)
  for k in range(7):
   yy=a+.13+(b-a-.26)*k/6;z=roof(yy)-.075;H.rivet((s*(sx(z)+.023),yy,z),(s,0,.1),.019)
  # exposed mounting bosses remain underneath detachable skirts
  for yy in [a+.16,b-.16]:H.box((s*(sx(.99)+.02),yy,.99),(.075,.09,.105),'Weapons',.01)
# floor and longitudinal chassis
H.box((0,0,.59),(2.66,6.50,.18),'TrackSteel',.035)
for x in [-1.05,1.05]:H.box((x,0,.46),(.16,5.9,.24),'TrackSteel',.018)
# End slopes: fronts are leaning inward; nose gun fixed recess and raised mantlet.
for end in [-1,1]:
 ybot=end*3.38;ytop=end*3.12
 # complete face; 57mm socket raised on a dark circular seating
 H.plate([(-1.48,ybot,.68),(1.48,ybot,.68),(1.275,ytop,2.60),(-1.275,ytop,2.60)],.06)
 for x in [-1.36,-.87,0,.87,1.36]:
  for k in range(12):
   z=.79+k*.15;yy=end*(3.38-(z-.68)*.26/1.92);xx=x*(1-(z-.68)*.06)
   H.rivet((xx,yy+end*.017,z),(0,end,.14),.021)
 for z in [.78,2.51]:
  for i in range(17):
   x=-1.21+i*2.42/16;yy=end*(3.38-(z-.68)*.26/1.92);H.rivet((x,yy+end*.025,z),(0,end,.14),.021)
 # lower folded prow triangles give the distinctive central upsweep
 for s in [-1,1]:
  H.plate([(0,end*3.405,1.05),(s*1.47,end*3.405,.65),(s*1.30,end*3.14,1.02)],.04,'TrackSteel')
  B=Build();B.box((s*1.36,end*3.25,.70),(.21,.41,.075),'Paint',.014);B.box((s*1.43,end*3.34,.58),(.06,.17,.27),'Paint',.013);part(B,f'Fender_{\"F\" if end<0 else \"R\"}{\"L\" if s>0 else \"R\"}')
  B=Build();B.torus((s*1.01,end*3.38,.93),.092,.025,axis=(1,0,0),mat='Weapons',n=20,k=6);B.box((s*1.01,end*3.32,.94),(.07,.15,.23),'Paint',.01);part(B,f'Tow_{\"Front\" if end<0 else \"Rear\"}_{s}')
# Roof fore/aft sloped armour; cab base sits in centre.
for a,b in [(-3.12,-.74),(.74,3.12)]:
 H.plate([(-sx(roof(a)),a,roof(a)),(sx(roof(a)),a,roof(a)),(sx(roof(b)),b,roof(b)),(-sx(roof(b)),b,roof(b))],.05)
 for yy in [a+.055,b-.055]:
  for i in range(17):H.rivet((-1.17+i*.146,yy,roof(yy)+.018),(0,0,1),.019)
for x in [-1.05,1.05]:H.box((x,0,2.74),(.42,1.55,.075),'Paint',.012)
# Engine deck grilles: separate louvres above solid dark fins and lined engine well.
for yy,label in [(-2.05,'Front'),(2.05,'Rear')]:
 H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015)
 B=Build()
 for x in [-.91,.91]:B.box((x,yy,roof(yy)+.08),(.055,1.36,.07),'Paint',.009)
 for y in [yy-.67,yy+.67]:B.box((0,y,roof(y)+.065),(1.86,.055,.07),'Paint',.009)
 for x in [-.62,0,.62]:
  for j in range(12):B.box((x,yy-.59+j*.108,roof(yy)+.065),(.56,.054,.039),'Paint',.009,Matrix.Rotation(-.18,3,'X'))
 for x in [-.90,.90]:
  for y in [yy-.60,yy+.60]:B.rivet((x,y,roof(y)+.125),(0,0,1),.022)
 part(B,'Grille_'+label)
# Cab: tapered square at roof centre, real recessed windows in surrounding armour.
# cab lower dimensions 1.66 x 1.50, top 1.46 x 1.28, top z3.28.
for end in [-1,1]:
 # face assembled around two deep vision ports, with sloped cheeks
 yy=end*.73
 H.box((0,yy,2.85),(1.65,.085,.16),'Paint',.01)
 H.box((0,end*.652,3.235),(1.46,.085,.075),'Paint',.01)
 for x in [-.71,0,.71]:H.box((x, end*.69,3.05),(.15,.11,.35),'Paint',.012)
 for x in [-.36,.36]:
  H.box((x,end*.645,3.07),(.51,.085,.23),'Interior',.014)
  # closeable armoured flap sits above a dark slit
  B=Build();B.box((x,end*.73,3.16),(.51,.055,.16),'Paint',.009,Matrix.Rotation(end*.13,3,'X'));B.cyl((x-.27,end*.75,3.25),(x+.27,end*.75,3.25),.022,'Weapons',12)
  for xx in [x-.20,x+.20]:B.rivet((xx,end*.77,3.18),(0,end,0),.017)
  part(B,f'CabFlap_{\"Front\" if end<0 else \"Rear\"}_{\"L\" if x>0 else \"R\"}')
for s in [-1,1]:
 H.plate([(s*.83,-.74,2.77),(s*.83,.74,2.77),(s*.73,.65,3.28),(s*.73,-.65,3.28)],.04)
 B=Build();B.box((s*.795,0,3.065),(.052,.45,.255),'Paint',.012);B.box((s*.833,0,3.08),(.035,.32,.035),'Weapons',.006)
 for yy in [-.17,.17]:B.cyl((s*.832,yy,2.99),(s*.832,yy,3.17),.022,'Weapons',10)
 part(B,'CabFlap_'+('L' if s>0 else 'R'))
 for yy in [-.66,.66]:
  for z in [2.83,2.94,3.05,3.17]:H.rivet((s*(.83-(z-2.77)*.196+.015),yy,z),(s,0,.2),.018)
# cab roof has actual hatch aperture and deep dark crew well.
for x in [-.60,.60]:H.box((x,0,3.27),(.25,1.31,.05),'Paint',.008)
for y in [-.56,.56]:H.box((0,y,3.27),(1.0,.20,.05),'Paint',.008)
H.box((0,0,2.69),(1.20,1.15,.08),'Interior',.009)
for x in [-.48,.48]:H.box((x,0,3.015),(.05,.90,.47),'Interior',.004)
for y in [-.44,.44]:H.box((0,y,3.015),(1.0,.05,.47),'Interior',.004)
B=Build();B.box((0,0,3.285),(.95,.88,.030),'Paint',.012)
for x in [-.30,.30]:B.cyl((x,.42,3.27),(x+.12,.42,3.27),.025,'Weapons',12)
B.tube([(-.12,-.03,3.30),(-.12,-.03,3.34),(.12,-.03,3.34),(.12,-.03,3.30)],.014,'Weapons',8)
hatches.append(B.object('Hatch_Commander',(0,.42,3.27)))
# two side access doors, with hinges and handle, detached door plates sit on full framed backing.
for s in [-1,1]:
 yy=-2.17;z=1.80;x=s*(sx(z)+.048)
 H.box((x-s*.016,yy,z),(.045,.67,1.02),'Interior',.025)
 B=Build();B.box((x+s*.03,yy,z),(.06,.61,.95),'Paint',.038)
 for zz in [1.46,2.12]:
  B.box((x+s*.072,yy-.25,zz),(.04,.13,.09),'Paint',.009);B.cyl((x+s*.093,yy-.28,zz-.065),(x+s*.093,yy-.28,zz+.065),.024,'Weapons',12)
 B.tube([(x+s*.08,yy+.19,1.7),(x+s*.13,yy+.19,1.7),(x+s*.13,yy+.19,1.91),(x+s*.08,yy+.19,1.91)],.016,'Weapons',8)
 part(B,'Door_'+('L' if s>0 else 'R'),(x,yy-.28,z))
 # Long muffler + swept inlet elbow and outlet; proper fixing bands and mounts.
 B=Build();xx=s*1.50
 pts=[(s*1.41,-.73,1.03),(xx,-.48,1.07),(xx,-.25,1.26),(xx,.05,1.38),(xx,.26,1.40)]
 B.tube(pts,.068,'Rust',14);B.cyl((xx,.18,1.4),(xx,1.50,1.4),.105,'Rust',20)
 B.tube([(xx,1.50,1.4),(xx,1.66,1.39),(xx,1.84,1.31),(s*1.45,1.94,1.27)],.068,'Rust',14)
 for y in [.26,1.42]:
  B.cyl((xx,y-.025,1.4),(xx,y+.025,1.4),.117,'Weapons',18);H.box((s*1.42,y,1.42),(.13,.095,.28),'Paint',.01)
 part(B,'Exhaust_'+('L' if s>0 else 'R'))
# Gun trunnion / armoured ball, with barrel as a genuine child.
G=Build();G.box((0,-3.22,1.93),(.69,.20,.67),'Paint',.036)
G.cyl((0,-3.27,1.93),(0,-3.46,1.93),.265,'Weapons',32,r2=.23)
G.cyl((0,-3.38,1.93),(0,-3.51,1.93),.166,'Paint',24)
gun=G.object('Gun',(0,-3.27,1.93))
B=Build();B.cyl((0,-3.45,1.93),(0,-3.66,1.93),.108,'Weapons',24,r2=.091);B.cyl((0,-3.64,1.93),(0,-4.06,1.93),.072,'Weapons',24,r2=.063)
# muzzle visible annulus + dark bore, not capped silver rod
B.torus((0,-4.058,1.93),.049,.014,axis=(0,1,0),mat='Weapons',n=24,k=6);B.cyl((0,-4.055,1.93),(0,-4.059,1.93),.035,'Interior',20)
barrel=B.object('Barrel',(0,-3.43,1.93));parent_keep(barrel,gun);empty('Muzzle',(0,-4.075,1.93),barrel)
# Driver and loader visors are articulated armour with dark crew spaces behind.
for x,label in [(-.91,'Loader'),(.91,'Driver')]:
 H.box((x,-3.267,2.08),(.40,.10,.22),'Interior',.016)
 B=Build();B.box((x,-3.342,2.12),(.43,.075,.16),'Paint',.014);B.box((x,-3.385,2.10),(.30,.018,.027),'Interior',.004);B.cyl((x-.24,-3.31,2.21),(x+.24,-3.31,2.21),.021,'Weapons',12)
 hatches.append(B.object('Hatch_'+label,(x,-3.31,2.21)))
# Three side machineguns each, two aft. Water-cooled jackets and small muzzle detail.
mg_count=0
for s in [1,-1]:
 for yy in [-1.20,.48,2.26]:
  z=2.14;xx=s*(sx(z)+.065);H.box((xx,yy,z),(.065,.35,.33),'Interior',.012)
  for yedge in [yy-.19,yy+.19]:H.box((xx+s*.025,yedge,z),(.045,.035,.39),'Paint',.007)
  B=Build();B.cyl((xx,yy,z),(xx+s*.10,yy,z),.12,'Weapons',16,r2=.09);B.cyl((xx+s*.07,yy,z),(xx+s*.40,yy,z),.044,'Weapons',16);B.cyl((xx+s*.39,yy,z),(xx+s*.50,yy,z),.026,'Weapons',12)
  for dd in [.13,.35]:B.cyl((xx+s*(dd-.012),yy,z),(xx+s*(dd+.012),yy,z),.050,'Weapons',16)
  B.cyl((xx+s*.496,yy,z),(xx+s*.501,yy,z),.013,'Interior',12)
  mg_count+=1;B.object('MG_'+str(mg_count),(xx,yy,z))
for x in [-.70,.70]:
 yy=3.205;z=2.13;H.box((x,yy,z),(.31,.10,.31),'Interior',.013)
 B=Build();B.cyl((x,yy,z),(x,yy+.12,z),.10,'Weapons',16);B.cyl((x,yy+.10,z),(x,yy+.46,z),.044,'Weapons',16);B.cyl((x,yy+.45,z),(x,yy+.53,z),.023,'Weapons',12)
 mg_count+=1;B.object('MG_'+str(mg_count),(x,yy,z))
# Running gear: roadwheel bogies, idlers/sprockets, upper return rollers.
for s,side in [(1,'L'),(-1,'R')]:
 x=s*1.12
 ys=[-2.84]+[-2.20+i*.44 for i in range(11)]+[2.84]
 for idx,y in enumerate(ys):
  r=.31 if idx in [0,12] else .235;z=.43 if idx in [0,12] else .31
  B=Build();B.cyl((x-s*.22,y,z),(x+s*.22,y,z),r,'TrackSteel',24)
  for sideOff in [-.205,.205]:B.torus((x+sideOff,y,z),r-.035,.031,axis=(1,0,0),mat='Weapons',n=24,k=6)
  B.cyl((x+s*.22,y,z),(x+s*.248,y,z),r*.64,'TrackSteel',24);B.cyl((x+s*.248,y,z),(x+s*.28,y,z),r*.25,'Weapons',16)
  for a in range(6):B.rivet((x+s*.269,y+cos(a*pi/3)*r*.43,z+sin(a*pi/3)*r*.43),(s,0,0),.013,'Weapons')
  if idx in [0,12]:
   for a in range(16):
    aa=a*2*pi/16;B.box((x,y+cos(aa)*r,z+sin(aa)*r),(.30,.065,.060),'TrackSteel',.007,Matrix.Rotation(aa,3,'X'))
  wheels.append(B.object(f'Wheel_{side}{idx+1}',(x,y,z)))
 # three leaf sprung bogie assemblies
 for y in [-1.76,0,1.76]:
  H.box((x+s*.12,y,.42),(.13,1.35,.13),'TrackSteel',.015)
  for k in range(4):H.box((x+s*.12,y,.52+k*.018),(.12,1.00-k*.14,.017),'TrackSteel',.004)
  for yy in [y-.43,y+.43]:H.cyl((x+s*.12,yy,.35),(x+s*.12,yy,.67),.047,'Weapons',12)
 for i,y in enumerate([-2.10,-.70,.70,2.10]):
  B=Build();B.cyl((x-.19,y,.80),(x+.19,y,.80),.13,'TrackSteel',20);B.cyl((x+s*.19,y,.80),(x+s*.23,y,.80),.065,'Weapons',16);wheels.append(B.object(f'Wheel_{side}{14+i}',(x,y,.80)))
# Continuous track path, rectangular pads individually bevelled. UV V advances exactly once around loop.
# radius .40, straight length 5.56 => zmin=0 (pad thickness .07)
TRACK_N=104
track_nodes={}
def track_pt(t):
 r=.40;half=2.78;per=4*half+2*pi*r;d=(t%1)*per
 if d<2*half:return (-half+d,.035,0)
 d-=2*half
 if d<pi*r:
  a=-pi/2+d/r;return (half+r*cos(a),.435+r*sin(a),a+pi/2)
 d-=pi*r
 if d<2*half:return (half-d,.835,pi)
 d-=2*half;a=pi/2+d/r;return (-half+r*cos(a),.435+r*sin(a),a+pi/2)
for s,side in [(1,'L'),(-1,'R')]:
 B=Build();x=s*1.12
 for i in range(TRACK_N):
  y,z,angle=track_pt(i/TRACK_N);R=Matrix.Rotation(angle,3,'X')
  start=len(B.f);B.box((x,y,z),(.49,.117,.069),'TrackSteel',.012,R)
  B.box(Vector((x,y,z))+R@Vector((0,0,-.041)),(.51,.034,.025),'TrackSteel',.006,R)
  # cast hinge knuckles, not rubber caterpillar rectangles
  B.cyl(Vector((x-.25,y,z))+R@Vector((0,.053,0)),Vector((x+.25,y,z))+R@Vector((0,.053,0)),.023,'Weapons',8)
  for k in range(start,len(B.f)):
   coords=[]
   for vi in B.f[k]:
    local=R.transposed()@(Vector(B.v[vi])-Vector((x,y,z)));coords.append((local.x/.53+.5,(i+.5+local.y/.127)/TRACK_N))
   B.uv[k]=coords
 track_nodes[side]=B.object('Track_'+side)
# Period-appropriate lamps tucked on rear brackets (small fittings, no invented modern equipment).
for s in [-1,1]:
 B=Build();B.box((s*1.15,3.22,1.37),(.12,.12,.21),'Weapons',.015);B.cyl((s*1.15,3.25,1.41),(s*1.15,3.31,1.41),.066,'Lamps',16)
 part(B,'Lamp_'+('L' if s>0 else 'R'))
hull=H.object('Hull')
for name,loc in [('Seat_Commander',(0,0,3.0)),('Seat_Driver',(.6,-2.6,2.0)),('Exhaust',(1.50,1.94,1.27)),('Light_Head_L',(1.10,-3.28,1.45)),('Light_Head_R',(-1.10,-3.28,1.45)),('Fx_Engine',(0,1.8,2.68)),('Fx_Ammo',(0,.8,1.2)),('Fx_Hatch',(0,0,3.30))]:empty(name,loc)
healthy=list(S.objects)
# Drop unused material slots so glTF exports only the materials used by each mesh.
def prune(o):
 if o.type"'!='"'MESH':return
 slots=list(o.data.materials);used=sorted(set(p.material_index for p in o.data.polygons));mapping={old:i for i,old in enumerate(used)};indices=[mapping[p.material_index] for p in o.data.polygons];o.data.materials.clear()
 for j in used:o.data.materials.append(slots[j])
 for p,i in zip(o.data.polygons,indices):p.material_index=i
for o in healthy:prune(o)
def triangles(obs):return sum(sum(len(p.vertices)-2 for p in o.data.polygons) for o in obs if o.type=='MESH')
print('HEALTHY_TRIANGLES',triangles(healthy),flush=True)

def export(obs,path):
 bpy.ops.object.select_all(action='DESELECT')
 for o in obs:o.hide_set(False);o.select_set(True)
 bpy.ops.export_scene.gltf(filepath=str(ROOT/path),export_format='GLB',use_selection=True,export_yup=True,export_apply=False,export_texcoords=True,export_normals=True,export_materials='EXPORT',export_image_format='AUTO',export_cameras=False,export_lights=False,export_extras=True)
 # Set canonical linear tint explicitly (exporter's multiply recognition varies across versions).
 p=ROOT/path;data=p.read_bytes();length,kind=struct.unpack_from('<II',data,12);j=json.loads(data[20:20+length]);binary=data[20+length:]
 for m in j.get('materials',[]):
  if m['name']=='Paint':m.setdefault('pbrMetallicRoughness',{})['baseColorFactor']=PAINTS[0][1]+[1]
 text=json.dumps(j,separators=(',',':')).encode();text+=b' '*((-len(text))%4);p.write_bytes(struct.pack('<III',0x46546c67,2,20+len(text)+len(binary))+struct.pack('<II',len(text),0x4e4f534a)+text+binary)
 print('EXPORTED',path,p.stat().st_size,flush=True)
export(healthy,'a7v-tank.glb')
# Damage twins derive directly from matching healthy parts, preserve their pivots.
hd=empty('Hull_Damage',(0,0,0));td=empty('Turret_Damage',(0,0,0));damage=[hd,td];twins=[]
def clone(o,name):
 q=o.copy();q.data=o.data.copy();q.name=name;S.collection.objects.link(q);q.parent=None;q.matrix_world=o.matrix_world.copy();return q
selected=[p for p in parts if any(k in p.name for k in ['Skirt_L2','Skirt_L3','Skirt_L5','Skirt_R2','Skirt_R4','Skirt_R6','Door_L','Door_R','Exhaust_L','Exhaust_R','Grille_Front','Grille_Rear','CabFlap_Front_L','CabFlap_Rear_R','CabFlap_L'])]
for idx,o in enumerate(selected):
 q=clone(o,o.name.replace('Part_','Dmg_'));bm=bmesh.new();bm.from_mesh(q.data)
 # Cut a ragged wedge away at the lower corner of armour plates, then peel the edge.
 if 'Skirt' in o.name or 'Door' in o.name:
  coords=[v.co for v in bm.verts];ymax=max(v.y for v in coords);zmin=min(v.z for v in coords)
  bmesh.ops.bisect_plane(bm,geom=list(bm.verts)+list(bm.edges)+list(bm.faces),dist=.0001,plane_co=(0,ymax-.11,zmin+.11),plane_no=(0,1,-1),clear_outer=True)
 for v in bm.verts:
  co=v.co
  if 'Exhaust' in o.name:co.x+=.12*sin(co.y*2);co.z-=.14*(.6+sin(co.y))
  elif 'Grille' in o.name:co.z+=.30*max(0,1-abs(co.x))*(.5+.5*sin(co.y*7))
  else:
   weight=max(0,(co.y+.6)/1.2);co.x+=(1 if o.location.x>=0 else -1)*(.11*weight+.045*sin(co.z*24));co.z-=.09*weight
 bm.to_mesh(q.data);bm.free()
 # Damage material darkened steel at torn edges is represented by strips below.
 par=td if 'CabFlap' in o.name else hd;parent_keep(q,par);twins.append((o,q));damage.append(q)
# Scar patches: disks sit 3mm above actual armour, metal petalled crater rims and black pits.
scar_names=[]
def scar_group(name,positions,normals):
 B=Build()
 for idx,(p,n) in enumerate(zip(positions,normals)):
  p=Vector(p);n=Vector(n).normalized();q=n.to_track_quat('Z','Y');r=.055 if idx else .105
  # asymmetric soot halo as a thin irregular disk
  count=16;vv=[p+n*.0025]
  for i in range(count):
   a=2*pi*i/count;rad=r*(1.5+.30*sin(i*4.2));vv.append(p+q@Vector((rad*cos(a),rad*sin(a),.003)))
  B.add(vv,[[0,i+1,(i+1)%count+1] for i in range(count)],'Burnt')
  # open rim with black interior inset; raised petals catch glancing light
  vv=[]
  for ring in [0,1,2]:
   for i in range(count):
    a=2*pi*i/count;rr=r*[1,.57,.44][ring];zz=[.003,.013+(.020 if idx==0 else .009)*(1+sin(i*3)),.004][ring];vv.append(p+q@Vector((rr*cos(a),rr*sin(a),zz)))
  B.add(vv,[[ring*count+i,ring*count+(i+1)%count,(ring+1)*count+(i+1)%count,(ring+1)*count+i] for ring in [0,1] for i in range(count)],'Scars')
  B.cyl(p+n*.003,p+n*.004,r*.45,'Interior',16)
  if idx>0:
   B.tube([p+q@Vector((r*.7,0,.004)),p+q@Vector((r*1.9,r*.3,.004)),p+q@Vector((r*2.7,r*.6,.004))],.008,'Scars',6)
 ob=B.object(name);prune(ob);parent_keep(ob,td if 'Turret' in name else hd);damage.append(ob);scar_names.append(name)
for s,side in [(1,'L'),(-1,'R')]:
 poses=[]
 for yy,zz in [(-1.65,1.70),(-.50,2.30),(1.30,1.85),(2.7,2.2)]:poses.append((s*(sx(zz)+.029),yy,zz))
 scar_group('Scar_Hull_'+side,poses,[(s,0,.1)]*4)
for end,label in [(-1,'Front'),(1,'Rear')]:
 positions=[]
 for xx,zz in [(-.54,1.45),(.62,1.82),(.23,2.44),(-1.0,1.23)]:positions.append((xx,end*(3.38-(zz-.68)*.26/1.92+.018),zz))
 scar_group('Scar_Hull_'+label,positions,[(0,end,.14)]*4)
for s,label in [(1,'L'),(-1,'R')]:scar_group('Scar_Turret_'+label,[(s*.78,-.4,3.04),(s*.78,.34,3.02),(s*.78,.1,3.12)],[(s,0,.2)]*3)
for end,label in [(-1,'Front'),(1,'Rear')]:scar_group('Scar_Turret_'+label,[(x,end*.75,2.87) for x in [-.5,0,.5]],[(0,end,.1)]*3)
# Broken gun combines original mount with a bent, split barrel at the same pivot.
q=clone(gun,'Gun_Broken');pieces=[q]
bb=clone(barrel,'broken_barrel_temp')
for v in bb.data.vertices:
 world=bb.matrix_world@v.co
 if world.y<-3.66:
  d=-3.66-world.y;world.z-=.75*d;world.x+=.05*sin(d*8)
  if d>.22:world.x+=.045*sin(v.index*2.3);world.z+=.04*cos(v.index*2.1)
  v.co=bb.matrix_world.inverted()@world
pieces.append(bb)
bpy.ops.object.select_all(action='DESELECT')
for o in pieces:o.select_set(True)
bpy.context.view_layer.objects.active=q;bpy.ops.object.join();parent_keep(q,td);damage.append(q)
# Snapped/derailed track copies: unlink a front arc; upper run sags and loose front links lie on ground.
for side in ['L','R']:
 orig=track_nodes[side];q=clone(orig,'Track_'+side+'_Broken')
 for v in q.data.vertices:
  y,z=v.co.y,v.co.z
  if y<-2.48:
   v.co.y=y-.30-(z/.85)*.95;v.co.z=max(.012,.035+(z-.435)*.03)
  elif z>.48:v.co.z-=.38*(.5+.5*sin((y+2.7)/5.4*pi));v.co.x+=(.12 if side=='L' else -.12)*sin((y+2.7)/5.4*pi)
 parent_keep(q,hd);damage.append(q)
# Wreck: complete burnt hull, suspension sagged; cab roof blown open; no turret on this type.
wreckpieces=[]
omit={'Part_Skirt_L2','Part_Skirt_L3','Part_Skirt_R4','Part_Grille_Rear','Part_CabFlap_Front_L','Part_CabFlap_Rear_R'}
for o in healthy:
 if o.type"'!='"'MESH' or o.name in omit or o.name=='Barrel' or o.name=='Gun':continue
 if o.name.startswith('Track_'):
  if o.name=='Track_L':src=next(q for q in damage if q.name=='Track_L_Broken')
  else:src=o
 else:src=o
 q=clone(src,'wreck_'+o.name)
 if o.name.startswith('Hatch_'):
  q.rotation_euler.rotate_axis('X',1.2)
 if o.name.startswith('Wheel_'):q.location.z-=.05
 if o.name=='Part_Grille_Front':q.rotation_euler.x=.24;q.location.z+=.16
 if o.name.startswith('Part_CabFlap'):q.rotation_euler.y=.42;q.location.z+=.08
 if o.name=='Hull':
  for v in q.data.vertices:
   if v.co.z>3.22:v.co.z+=.09*sin(v.co.y*10)+.035;v.co.x*=1.05
 for v in q.data.vertices:
  if v.co.z>.65:v.co.x+=.006*sin(v.co.z*17+v.co.y*11)
 q.data.materials.clear();q.data.materials.append(MATS['Burnt'])
 for p in q.data.polygons:p.material_index=0
 wreckpieces.append(q)
q=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun');q.parent=None;q.data.materials.clear();q.data.materials.append(MATS['Burnt'])
for p in q.data.polygons:p.material_index=0
wreckpieces.append(q)
bpy.ops.object.select_all(action='DESELECT')
for o in wreckpieces:o.select_set(True)
bpy.context.view_layer.objects.active=wreckpieces[0];bpy.ops.object.join();wreck=bpy.context.object;wreck.name='Wreck_Hull'
# Move origin to ground centre without touching the mesh placement.
mw=wreck.matrix_world.copy();wreck.data.transform(mw);wreck.matrix_world=Matrix.Identity(4)
mod=wreck.modifiers.new('Wreck simplification','DECIMATE');mod.ratio=.44;bpy.context.view_layer.objects.active=wreck;bpy.ops.object.modifier_apply(modifier=mod.name)
damage.append(wreck)
# Damage materials conform to five-bucket contract, shared Paint preserved.
for o in damage:
 if o.type"'!='"'MESH':continue
 for i,m in enumerate(o.data.materials):
  if m.name in ['Weapons','Rust']:o.data.materials[i]=MATS['TrackSteel']
  elif m.name in ['Interior','Lamps']:o.data.materials[i]=MATS['Burnt']
 prune(o)
print('DAMAGE_TRIANGLES',triangles(damage),flush=True)
export(damage,'a7v-tank-damage.glb')
# Metadata uses glTF axes, node pivots (world) and actual transformed bounds.
def xyz(v):return [round(v.x,5),round(v.z,5),round(-v.y,5)]
def manifest(obs):
 bpy.context.view_layer.update();nodes=[];points=[]
 for o in obs:
  nodes.append({'name':o.name,'position':xyz(o.matrix_world.translation),'parent':o.parent.name if o.parent else None,'triangles':sum(len(p.vertices)-2 for p in o.data.polygons) if o.type=='MESH' else 0})
  if o.type=='MESH':points.extend([o.matrix_world@Vector(p) for p in o.bound_box])
 pp=[xyz(p) for p in points]
 return {'nodes':nodes,'bounds':{'min':[min(p[i] for p in pp) for i in range(3)],'max':[max(p[i] for p in pp) for i in range(3)]},'triangles':triangles(obs)}
meta={'contract':'tank-damage/v1','type':'A7V turretless','axes':{'forward':'+Z','up':'+Y','left':'+X'},'units':'metres','files':{'a7v-tank.glb':manifest(healthy),'a7v-tank-damage.glb':manifest(damage)},'paints':[{'name':name,'linear_rgb':col} for name,col in PAINTS],'damage':{'parts':[{'part':p.name,'twin':next((q.name for o,q in twins if o==p),None)} for p in parts],'scars':scar_names,'broken':{'Track_L':'Track_L_Broken','Track_R':'Track_R_Broken','Gun':'Gun_Broken'},'wreck':['Wreck_Hull'],'turretless':True},'rig':{'Gun':{'yaw_axis':'Y','yaw_degrees':[-25,25],'elevation_axis':'X'},'Barrel':{'recoil_axis':'Z'},'wheels':{'axis':'X'},'track_uv':'V runs once around the loop','machine_guns':8,'turret':None},'bakes':BAKES}
(ROOT/'nodes.json').write_text(json.dumps(meta,indent=2))
# Save source scene then use clean glTF imports for all delivery render proofs.
bpy.ops.wm.save_as_mainfile(filepath=str(ROOT/'a7v-source.blend'))
for o in list(bpy.data.objects):bpy.data.objects.remove(o,do_unlink=True)
bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank.glb'));A=list(S.objects)
bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank-damage.glb'));D=[o for o in S.objects if o not in A]
# Exported material tint is the proof source. Names can be suffixed by the importer.
paintmats=[m for m in bpy.data.materials if m.name.startswith('Paint') and m.users]
# neutral studio floor and broad natural daylight
floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87
bpy.ops.mesh.primitive_plane_add(size=200,location=(0,0,-.035));floor=bpy.context.object;floor.name='StudioFloor';floor.data.materials.append(floorMat)
S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5
ld=bpy.data.lights.new('Daylight','AREA');lo=bpy.data.objects.new('Daylight',ld);S.collection.objects.link(lo);lo.location=(5,-6,9);ld.energy=2100;ld.shape='DISK';ld.size=7
lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler()
ld=bpy.data.lights.new('Rim','AREA');lo=bpy.data.objects.new('Rim',ld);S.collection.objects.link(lo);lo.location=(-4,3,6);ld.energy=1400;ld.size=6;lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler()
camd=bpy.data.cameras.new('Camera');cam=bpy.data.objects.new('Camera',camd);S.collection.objects.link(cam);S.camera=cam
camd.type='ORTHO';camd.ortho_scale=10.6
CAM=(9,-12,7.2);TARGET=(0,-.20,1.45)
def camera(pos=CAM,target=TARGET,scale=10.6):cam.location=pos;cam.rotation_euler=(Vector(target)-cam.location).to_track_quat('-Z','Y').to_euler();camd.ortho_scale=scale
camera()
def show(obs,val):
 for o in obs:o.hide_render=not val

def render(name,w=1920,h=1080,samples=24):
 S.render.resolution_x=w;S.render.resolution_y=h;S.render.resolution_percentage=100;S.cycles.samples=samples;S.render.filepath=str(ROOT/name);bpy.ops.render.render(write_still=True)
show(A,True);show(D,False)
render('final.png')
camera((10,0,3.1),(0,0,1.65),9.5);render('side.png',1920,1080,20)
camera()
clay=bpy.data.materials.new('ClayProof');clay.use_nodes=True;cp=clay.node_tree.nodes.get('Principled BSDF');cp.inputs['Base Color'].default_value=(.43,.43,.43,1);cp.inputs['Roughness'].default_value=.78
S.view_layers[0].material_override=clay;render('clay.png',1920,1080,16);S.view_layers[0].material_override=None
# Mechanical pivot evidence: rotate every moving node 30 degrees in place; restore afterwards.
moving=[o for o in A if o.name.startswith(('Wheel_','Hatch_','MG_')) or o.name in ['Gun','Barrel']]
transforms={o.name:o.matrix_basis.copy() for o in moving}
for o in moving:
 o.rotation_euler.rotate_axis('Z' if o.name=='Gun' else 'X',pi/6)
render('pivots.png',1280,720,12)
for o in moving:o.matrix_basis=transforms[o.name]
# Grid tiles are assembled via Blender image buffers, no external image package required.
def grid(paths,out):
 tiles=[bpy.data.images.load(str(ROOT/p),check_existing=False) for p in paths];w,h=tiles[0].size
 canvas=np.ones((h*2,w*3,4),dtype=np.float32)
 for i,im in enumerate(tiles):canvas[(1-i//3)*h:(2-i//3)*h,(i%3)*w:(i%3+1)*w]=np.asarray(im.pixels[:],dtype=np.float32).reshape(h,w,4)
 im=bpy.data.images.new(out,w*3,h*2,alpha=True);im.pixels.foreach_set(canvas.ravel());im.filepath_raw=str(ROOT/out);im.file_format='PNG';im.save()
 for t in tiles:bpy.data.images.remove(t)
# recolour imported glTF materials via supported texture multiply sockets

def recolour(rgb):
 for o in A:
  if o.type"'!='"'MESH':continue
  for m in o.data.materials:
   if not m.name.startswith('Paint'):continue
   nt=m.node_tree;p=next(n for n in nt.nodes if n.type=='BSDF_PRINCIPLED');sock=p.inputs['Base Color']
   if sock.is_linked:
    node=sock.links[0].from_node
    if node.type=='MIX':
     # importer uses multiply Mix colour B at socket 7
     node.inputs[7].default_value=(*rgb,1)
    elif node.type=='MIX_RGB':node.inputs[2].default_value=(*rgb,1)
    elif node.type=='TEX_IMAGE':
     tex=node;mul=nt.nodes.new('ShaderNodeMixRGB');mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*rgb,1);nt.links.new(tex.outputs['Color'],mul.inputs[1]);nt.links.new(mul.outputs[0],sock)
   else:sock.default_value=(*rgb,1)
for i,(name,rgb) in enumerate(PAINTS):
 recolour(rgb);render(f'paint-{i}.png',640,360,12)
grid([f'paint-{i}.png' for i in range(6)],'paints.png');recolour(PAINTS[0][1])
# Render exactly the imported exported nodes, turning states on/off only.
def named(name,objs):return next((o for o in objs if o.name==name or o.name.split('.')[0]==name),None)
for state in range(6):
 show(A,state<4);show(D,False)
 if state==1:
  for n in scar_names:
   o=named(n,D)
   if o:o.hide_render=False
  for p,q in twins[:6]:
   named(p.name,A).hide_render=True;named(q.name,D).hide_render=False
 elif state==2:
  for o in A:
   if o.name.startswith('Part_'):o.hide_render=True
 elif state==3:
  named('Track_L',A).hide_render=True;named('Track_L_Broken',D).hide_render=False
  for n in ['Gun','Barrel']:named(n,A).hide_render=True
  named('Gun_Broken',D).hide_render=False
 elif state>=4:named('Wreck_Hull',D).hide_render=False
 # State 6 equals turretless wreck: deliberately no fictitious detachable turret.
 render(f'state-{state}.png',640,360,16)
grid([f'state-{i}.png' for i in range(6)],'states.png')
notes=[
 'WWI German A7V-style turretless heavy tank reconstructed from sheet.jpg; movable gun, eight MGs, hatches, wheels, removable fittings and aligned damage/wreck assets.',
 f'Triangles: healthy {meta[\"files\"][\"a7v-tank.glb\"][\"triangles\"]:,}; damage {meta[\"files\"][\"a7v-tank-damage.glb\"][\"triangles\"]:,}; uncompressed GLB meshes with metre units.',
 'Materials: Paint, TrackSteel, Rubber, Weapons, Rust, Interior, Lamps; damage adds Burnt and Scars; Paint neutral baked texture × linear field-grey factor [0.19,0.22,0.19].',
 'Textures: shared Cycles OptiX baked base/normal 1024px Paint, 512px others; ORM 512px; proof renders use re-imported GLBs.',
 'Poly Haven CC0 ids: metal_plate, rusty_metal_03; https://polyhaven.com/license ; source maps downloaded from dl.polyhaven.org.',
 'Differences: eight MGs follow written brief; no turret or Wreck_Turret (sixth state repeats turretless wreck); dimensions include protruding weapons beyond the armour footprint; weathering is shared tiling, not a unique historical vehicle.'
]
(ROOT/'NOTES.md').write_text('\\n'.join(notes)+'\\n')
print('BUILD_COMPLETE',flush=True)
PY
python3 -m py_compile build_a7v-tank.py
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/
ssh gex44 '/root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py' > /tmp/a7v-build.log 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "date -u '+%F %T'; tail -15 /tmp/a7v-build.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
2026-10-11 16:27:06

codex
The clean build script is running through the GPU bakes now. It includes the healthy rig, removable armour and fittings, damaged replacements, thrown tracks, and a complete burnt wreck. I’ll check the exported silhouette and materials in the first renders before refining them.

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/bin/bash -lc "tail -18 /tmp/a7v-build.log; ssh gex44 'ls -lh /root/fal-author/a7v-tank-v1/textures | tail -6'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 1058ms:
ls: cannot access '/root/fal-author/a7v-tank-v1/textures': No such file or directory

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/bin/bash -lc "ps -eo pid,etime,args | rg 'a7v|scp|ssh gex44' | head -20; ssh gex44 'ls -l /root/fal-author/a7v-tank-v1'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 653ms:
 704021       08:09 bash -c    [ "$(cat a7v-tank-v1/rc.txt 2>/dev/null)" = 0 ] && exit 0   ~/forge-build/forge-assets/tools/author/launch.sh a7v-tank-v1 ; printf "%s rc=%s %s\n" a7v-tank-v1 "$?" "$(TZ=Europe/Paris date +%H:%M)" >> /tmp/tanks2-20261011/queue.log
 704024       08:09 bash /home/claude-agent/forge-build/forge-assets/tools/author/launch.sh a7v-tank-v1
 705923       07:20 ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/t55-tank-v1/build_t55-tank.py > /root/fal-author/t55-tank-v1/build.log 2>&1
 711481       04:38 ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/type99-tank-v1/build_type99-tank.py -- --preflight > /root/fal-author/type99-tank-v1/preflight.log 2>&1
 714697       03:26 ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/char-b1-tank-v1/preflight.py > /root/fal-author/char-b1-tank-v1/preflight.log 2>&1
 717201       02:05 ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/churchill-tank-v1/build_churchill-tank.py > /root/fal-author/churchill-tank-v1/build.log 2>&1
 720484       00:39 ssh gex44 cd /root/fal-author/renault-ft-tank-v1 && nohup timeout 540 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/renault-ft-tank-v1/build_renault-ft-tank.py -- --rebake > build-final2.log 2>&1 < /dev/null & echo $!
 720732       00:35 /bin/bash -c cat > build_a7v-tank.py <<'PY' """A7V game asset. Blender 5.2: -b --python-exit-code 1 --python build_a7v-tank.py Clean build includes CC0 downloads, Cycles GPU material bakes, two exports and import proofs. Authoring coordinates: X left, -Y forward, Z up. glTF conversion produces X left,Y up,Z forward. """ import bpy, bmesh, math, os, json, random, struct, urllib.request, sys from pathlib import Path from mathutils import Vector, Matrix from math import sin,cos,pi import numpy as np ROOT=Path(__file__).resolve().parent TEX=ROOT/'textures'; TEX.mkdir(exist_ok=True) random.seed(74) bpy.ops.wm.read_factory_settings(use_empty=True) S=bpy.context.scene;S.unit_settings.system='METRIC';S.render.engine='CYCLES' S.cycles.samples=24;S.cycles.use_denoising=True prefs=bpy.context.preferences.addons['cycles'].preferences prefs.compute_device_type='OPTIX';prefs.get_devices() for dev in prefs.devices:dev.use=dev.type=='OPTIX' S.cycles.device='GPU';S.cycles.bake_type='EMIT' S.render.image_settings.file_format='PNG';S.view_settings.view_transform='AgX' PAINTS=[('field grey',[.19,.22,.19]),('olive drab',[.20,.22,.10]),('desert tan',[.55,.42,.26]),('winter white',[.78,.79,.73]),('dark green-black',[.055,.075,.06]),('panzer grey',[.115,.135,.15])] IDS=['metal_plate','rusty_metal_03'] def fetch(url,path):  if not path.exists():   req=urllib.request.Request(url,headers={'User-Agent':'Mozilla/5.0'})   with urllib.request.urlopen(req,timeout=90) as r:path.write_bytes(r.read()) for ident in IDS:  for mp in ['diff','nor_gl','arm']:   p=TEX/f'{ident}_{mp}_1k.jpg'   fetch(f'https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/{ident}/{ident}_{mp}_1k.jpg',p) print('TEXTURES_READY',flush=True) MATS={};BAKES=[] def texture(nt,path,noncolor=False):  n=nt.nodes.new('ShaderNodeTexImage');n.image=bpy.data.images.load(str(path),check_existing=True)  if noncolor:n.image.colorspace_settings.name='Non-Color'  return n  def make_mat(name,colour,metal,rough,ident='metal_plate',res=512):  # Bake a shared 2 m tiling/trim swatch; geometry uses metre-scaled UVs.  m=bpy.data.materials.new(name);m.use_nodes=True;nt=m.node_tree;nt.nodes.clear();lk=nt.links  out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs['Surface'])  uv=nt.nodes.new('ShaderNodeTexCoord');diff=texture(nt,TEX/f'{ident}_diff_1k.jpg');norm=texture(nt,TEX/f'{ident}_nor_gl_1k.jpg',True);arm=texture(nt,TEX/f'{ident}_arm_1k.jpg',True)  for n in [diff,norm,arm]:lk.new(uv.outputs['UV'],n.inputs['Vector'])  bw=nt.nodes.new('ShaderNodeRGBToBW');lk.new(diff.outputs['Color'],bw.inputs[0])  ramp=nt.nodes.new('ShaderNodeValToRGB');ramp.color_ramp.elements[0].position=.08;ramp.color_ramp.elements[1].position=.8  if name=='Paint':lo=(.46,.46,.45,1);hi=(.94,.95,.94,1)  else:lo=(*[c*.40 for c in colour],1);hi=(*[min(1,c*1.6) for c in colour],1)  ramp.color_ramp.elements[0].color=lo;ramp.color_ramp.elements[1].color=hi;lk.new(bw.outputs[0],ramp.inputs[0])  mapping=nt.nodes.new('ShaderNodeVectorMath');mapping.operation='MULTIPLY';mapping.inputs[1].default_value=(48,2.3,1);lk.new(uv.outputs['UV'],mapping.inputs[0])  noise=nt.nodes.new('ShaderNodeTexNoise');noise.inputs['Scale'].default_value=4;noise.inputs['Detail'].default_value=3;lk.new(mapping.outputs[0],noise.inputs['Vector'])  grime=nt.nodes.new('ShaderNodeValToRGB');grime.color_ramp.elements[0].position=.25;grime.color_ramp.elements[0].color=(.45,.45,.44,1);grime.color_ramp.elements[1].position=.62;grime.color_ramp.elements[1].color=(1,1,1,1);lk.new(noise.outputs['Fac'],grime.inputs[0])  mix=nt.nodes.new('ShaderNodeMixRGB');mix.blend_type='MULTIPLY';mix.inputs[0].default_value=.42;lk.new(ramp.outputs['Color'],mix.inputs[1]);lk.new(grime.outputs['Color'],mix.inputs[2]);lk.new(mix.outputs[0],p.inputs['Base Color'])  nm=nt.nodes.new('ShaderNodeNormalMap');nm.inputs['Strength'].default_value=.24 if name=='Paint' else .42;lk.new(norm.outputs[0],nm.inputs['Color']);lk.new(nm.outputs[0],p.inputs['Normal'])  sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(arm.outputs[0],sep.inputs[0])  rr=nt.nodes.new('ShaderNodeMapRange');rr.inputs['To Min'].default_value=max(.42,rough-.12);rr.inputs['To Max'].default_value=min(.98,rough+.12);lk.new(sep.outputs[1],rr.inputs[0]);lk.new(rr.outputs[0],p.inputs['Roughness']);p.inputs['Metallic'].default_value=metal  bpy.ops.mesh.primitive_plane_add(size=2);o=bpy.context.object;o.name='BakeFixture';o.data.materials.append(m)  active=nt.nodes.new('ShaderNodeTexImage');nt.nodes.active=active  emit=nt.nodes.new('ShaderNodeEmission')  baked={}  for mode,sz in [('base',res),('normal',res),('orm',512)]:   im=bpy.data.images.new(name+'_'+mode,width=sz,height=sz,alpha=False)   if mode!='base':im.colorspace_settings.name='Non-Color'   active.image=im;nt.nodes.active=active   if mode=='base':    lk.new(mix.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT')   elif mode=='normal':    lk.new(p.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='NORMAL')   else:    comb=nt.nodes.new('ShaderNodeCombineColor');comb.inputs[0].default_value=1;comb.inputs[2].default_value=metal;lk.new(rr.outputs[0],comb.inputs[1]);lk.new(comb.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT')   im.filepath_raw=str(TEX/f'{name}_{mode}.png');im.file_format='PNG';im.save();baked[mode]=im  bpy.data.objects.remove(o,do_unlink=True)  nt.nodes.clear();out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs[0])  bn=nt.nodes.new('ShaderNodeTexImage');bn.image=baked['base'];nn=nt.nodes.new('ShaderNodeTexImage');nn.image=baked['normal'];on=nt.nodes.new('ShaderNodeTexImage');on.image=baked['orm']  if name=='Paint':   mul=nt.nodes.new('ShaderNodeMixRGB');mul.name='PaintFactor';mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*PAINTS[0][1],1);lk.new(bn.outputs[0],mul.inputs[1]);lk.new(mul.outputs[0],p.inputs['Base Color'])  else:lk.new(bn.outputs[0],p.inputs['Base Color'])  normal=nt.nodes.new('ShaderNodeNormalMap');lk.new(nn.outputs[0],normal.inputs[0 if False else 'Color']);lk.new(normal.outputs[0],p.inputs['Normal'])  sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(on.outputs[0],sep.inputs[0]);lk.new(sep.outputs[1],p.inputs['Roughness']);lk.new(sep.outputs[2],p.inputs['Metallic'])  # Exporter-supported occlusion group.  group=bpy.data.node_groups.get('glTF Material Output')  if not group:   group=bpy.data.node_groups.new('glTF Material Output','ShaderNodeTree');group.interface.new_socket(name='Occlusion',in_out='INPUT',socket_type='NodeSocketFloat')  gn=nt.nodes.new('ShaderNodeGroup');gn.node_tree=group;lk.new(sep.outputs[0],gn.inputs['Occlusion'])  if name=='Lamps':p.inputs['Emission Color'].default_value=(.55,.39,.19,1);p.inputs['Emission Strength'].default_value=.1  MATS[name]=m;BAKES.append({'material':name,'colour_normal':res,'ORM':512,'device':'OPTIX','passes':['EMIT base','NORMAL tangent','EMIT ORM'],'source':ident})  print('BAKED',name,flush=True) for args in [('Paint',(1,1,1),.12,.82,'metal_plate',1024),('TrackSteel',(.13,.12,.10),.78,.68,'rusty_metal_03',512),('Rubber',(.026,.025,.023),.03,.94,'metal_plate',512),('Weapons',(.11,.12,.115),.82,.43,'metal_plate',512),('Rust',(.19,.085,.047),.50,.79,'rusty_metal_03',512),('Interior',(.018,.02,.018),.1,.91,'metal_plate',512),('Lamps',(.65,.56,.37),.3,.32,'metal_plate',512),('Burnt',(.075,.07,.064),.35,.94,'rusty_metal_03',512),('Scars',(.31,.29,.25),.8,.63,'rusty_metal_03',512)]:make_mat(*args) MATLIST=list(MATS.values());MI={m.name:i for i,m in enumerate(MATLIST)} # Batched parametric geometry. Separate rigid/moving assemblies preserve pivots. CACHE={} def box_template(size,bev):  key=(tuple(round(x,5) for x in size),round(bev,5))  if key in CACHE:return CACHE[key]  bm=bmesh.new();bmesh.ops.create_cube(bm,size=1)  for v in bm.verts:v.co.x*=size[0];v.co.y*=size[1];v.co.z*=size[2]  if bev:bmesh.ops.bevel(bm,geom=list(bm.edges),offset=bev,segments=2,affect='EDGES',clamp_overlap=True)  bm.verts.ensure_lookup_table();bm.verts.index_update();v=[tuple(v.co) for v in bm.verts];f=[[v.index for v in p.verts] for p in bm.faces];bm.free();CACHE[key]=(v,f);return v,f class Build:  def __init__(self):self.v=[];self.f=[];self.mi=[];self.smooth=[];self.uv=[]  def add(self,verts,faces,mat='Paint',smooth=False,uv=None):   off=len(self.v);self.v.extend([tuple(v) for v in verts]);self.f.extend([[off+i for i in f] for f in faces]);self.mi.extend([MI[mat]]*len(faces));self.smooth.extend([smooth]*len(faces));self.uv.extend(uv if uv else [None]*len(faces))  def box(self,c,d,mat='Paint',bev=.009,rot=None):   v,f=box_template(d,bev);R=rot or Matrix.Identity(3);self.add([R@Vector(p)+Vector(c) for p in v],f,mat)  def cyl(self,a,b,r,mat='Weapons',n=16,r2=None):   a,b=Vector(a),Vector(b);q=(b-a).to_track_quat('Z','Y');r2=r if r2 is None else r2   verts=[a+q@Vector((r*cos(2*pi*i/n),r*sin(2*pi*i/n),0)) for i in range(n)]+[b+q@Vector((r2*cos(2*pi*i/n),r2*sin(2*pi*i/n),0)) for i in range(n)]   fs=[list(reversed(range(n))),list(range(n,2*n))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)];self.add(verts,fs,mat,True)  def rivet(self,p,normal,r=.021,mat='Paint'):   p=Vector(p);q=Vector(normal).to_track_quat('Z','Y');n=8   vv=[p+q@Vector((r*cos(i*2*pi/n),r*sin(i*2*pi/n),.001)) for i in range(n)]   vv += [p+q@Vector((r*.78*cos(i*2*pi/n),r*.78*sin(i*2*pi/n),r*.65)) for i in range(n)]   vv += [p+q@Vector((0,0,r*.88))]   ff=[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)]+[[i+n,(i+1)%n+n,2*n] for i in range(n)];self.add(vv,ff,mat,True)  def tube(self,points,r,mat='Rust',n=12):   points=[Vector(p) for p in points];vv=[]   for i,p in enumerate(points):    tangent=points[min(i+1,len(points)-1)]-points[max(0,i-1)];q=tangent.to_track_quat('Z','Y')    vv += [p+q@Vector((r*cos(j*2*pi/n),r*sin(j*2*pi/n),0)) for j in range(n)]   ff=[]   for i in range(len(points)-1):    for j in range(n):ff.append([i*n+j,i*n+(j+1)%n,(i+1)*n+(j+1)%n,(i+1)*n+j])   ff += [list(reversed(range(n))),list(range((len(points)-1)*n,len(points)*n))];self.add(vv,ff,mat,True)  def torus(self,c,major,minor,axis=(1,0,0),mat='TrackSteel',n=24,k=6):   q=Vector(axis).to_track_quat('Z','Y');vv=[]   for i in range(n):    for j in range(k):     a=i*2*pi/n;b=j*2*pi/k;vv.append(Vector(c)+q@Vector(((major+minor*cos(b))*cos(a),(major+minor*cos(b))*sin(a),minor*sin(b))))   self.add(vv,[[i*k+j,((i+1)%n)*k+j,((i+1)%n)*k+(j+1)%k,i*k+(j+1)%k] for i in range(n) for j in range(k)],mat,True)  def plate(self,points,thick=.035,mat='Paint'):   ps=[Vector(p) for p in points];normal=(ps[1]-ps[0]).cross(ps[2]-ps[0]).normalized();n=len(ps)   self.add(ps+[p-normal*thick for p in ps],[list(range(n)),list(reversed(range(n,2*n)))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)],mat)  def object(self,name,pivot=(0,0,0)):   me=bpy.data.meshes.new(name);me.from_pydata([Vector(p)-Vector(pivot) for p in self.v],[],self.f);me.update()   ob=bpy.data.objects.new(name,me);S.collection.objects.link(ob);ob.location=pivot   for m in MATLIST:me.materials.append(m)   uv=me.uv_layers.new(name='UVMap')   for poly,mi,sm,custom in zip(me.polygons,self.mi,self.smooth,self.uv):    poly.material_index=mi;poly.use_smooth=sm    normal=poly.normal;axis=max(range(3),key=lambda i:abs(normal[i]))    for j,li in enumerate(poly.loop_indices):     v=Vector(self.v[me.loops[li].vertex_index])     if custom:coord=custom[j]     elif axis==0:coord=(v.y*.48,(v.z-.5)*.48)     elif axis==1:coord=(v.x*.48,(v.z-.5)*.48)     else:coord=(v.x*.48,v.y*.48)     uv.data[li].uv=coord   return ob  def empty(name,p,parent=None):  o=bpy.data.objects.new(name,None);S.collection.objects.link(o);o.location=p  if parent:parent_keep(o,parent)  return o def parent_keep(o,p):  bpy.context.view_layer.update();mw=o.matrix_world.copy();o.parent=p;o.matrix_world=mw  def origin_center(o):  if o.type!='MESH':return  c=sum((v.co for v in o.data.vertices),Vector())/len(o.data.vertices);o.data.transform(Matrix.Translation(-c));o.location+=c  return o H=Build();parts=[];healthy=[];wheels=[];hatches=[] def part(b,name,pivot=None):  o=b.object('Part_'+name,pivot or (0,0,0))  if pivot is None:origin_center(o)  parts.append(o);return o # Armour: lower edge flares outward, upper shoulders taper inward. def sx(z):return 1.48-(z-.65)*.10 # Main side plate strips with actual seam gaps over a complete interior underlayer. sideYs=[-3.27,-2.23,-1.08,.02,1.10,2.22,3.27] def roof(y):return 2.77-.065*max(0,abs(y)-.55) for s in [-1,1]:  H.plate([(s*sx(.64),-3.28,.64),(s*sx(.64),3.28,.64),(s*sx(2.60),3.18,2.60),(s*sx(2.60),-3.18,2.60)],.055)  for j,(a,b) in enumerate(zip(sideYs,sideYs[1:])):   # fitted upper panels and six detachable lower plates per side   za,zb=roof(a),roof(b)   H.plate([(s*(sx(1.10)+.009),a+.004,1.10),(s*(sx(1.10)+.009),b-.004,1.10),(s*(sx(zb)+.009),b-.004,zb),(s*(sx(za)+.009),a+.004,za)],.035)   B=Build();B.plate([(s*(sx(.64)+.018),a+.008,.64),(s*(sx(.64)+.018),b-.008,.64),(s*(sx(1.11)+.022),b-.008,1.11),(s*(sx(1.11)+.022),a+.008,1.11)],.04)   for yy in [a+.11,b-.11]:    for zz in [.74,1.01]:B.rivet((s*(sx(zz)+.024),yy,zz),(s,0,.1),.022)   part(B,f'Skirt_{"L" if s>0 else "R"}{j+1}')   for yy in [a+.055,b-.055]:    for k in range(11):     z=1.14+k*(min(za,zb)-1.23)/10;H.rivet((s*(sx(z)+.027),yy,z),(s,0,.10),.019)   for k in range(7):    yy=a+.13+(b-a-.26)*k/6;z=roof(yy)-.075;H.rivet((s*(sx(z)+.023),yy,z),(s,0,.1),.019)   # exposed mounting bosses remain underneath detachable skirts   for yy in [a+.16,b-.16]:H.box((s*(sx(.99)+.02),yy,.99),(.075,.09,.105),'Weapons',.01) # floor and longitudinal chassis H.box((0,0,.59),(2.66,6.50,.18),'TrackSteel',.035) for x in [-1.05,1.05]:H.box((x,0,.46),(.16,5.9,.24),'TrackSteel',.018) # End slopes: fronts are leaning inward; nose gun fixed recess and raised mantlet. for end in [-1,1]:  ybot=end*3.38;ytop=end*3.12  # complete face; 57mm socket raised on a dark circular seating  H.plate([(-1.48,ybot,.68),(1.48,ybot,.68),(1.275,ytop,2.60),(-1.275,ytop,2.60)],.06)  for x in [-1.36,-.87,0,.87,1.36]:   for k in range(12):    z=.79+k*.15;yy=end*(3.38-(z-.68)*.26/1.92);xx=x*(1-(z-.68)*.06)    H.rivet((xx,yy+end*.017,z),(0,end,.14),.021)  for z in [.78,2.51]:   for i in range(17):    x=-1.21+i*2.42/16;yy=end*(3.38-(z-.68)*.26/1.92);H.rivet((x,yy+end*.025,z),(0,end,.14),.021)  # lower folded prow triangles give the distinctive central upsweep  for s in [-1,1]:   H.plate([(0,end*3.405,1.05),(s*1.47,end*3.405,.65),(s*1.30,end*3.14,1.02)],.04,'TrackSteel')   B=Build();B.box((s*1.36,end*3.25,.70),(.21,.41,.075),'Paint',.014);B.box((s*1.43,end*3.34,.58),(.06,.17,.27),'Paint',.013);part(B,f'Fender_{"F" if end<0 else "R"}{"L" if s>0 else "R"}')   B=Build();B.torus((s*1.01,end*3.38,.93),.092,.025,axis=(1,0,0),mat='Weapons',n=20,k=6);B.box((s*1.01,end*3.32,.94),(.07,.15,.23),'Paint',.01);part(B,f'Tow_{"Front" if end<0 else "Rear"}_{s}') # Roof fore/aft sloped armour; cab base sits in centre. for a,b in [(-3.12,-.74),(.74,3.12)]:  H.plate([(-sx(roof(a)),a,roof(a)),(sx(roof(a)),a,roof(a)),(sx(roof(b)),b,roof(b)),(-sx(roof(b)),b,roof(b))],.05)  for yy in [a+.055,b-.055]:   for i in range(17):H.rivet((-1.17+i*.146,yy,roof(yy)+.018),(0,0,1),.019) for x in [-1.05,1.05]:H.box((x,0,2.74),(.42,1.55,.075),'Paint',.012) # Engine deck grilles: separate louvres above solid dark fins and lined engine well. for yy,label in [(-2.05,'Front'),(2.05,'Rear')]:  H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015)  B=Build()  for x in [-.91,.91]:B.box((x,yy,roof(yy)+.08),(.055,1.36,.07),'Paint',.009)  for y in [yy-.67,yy+.67]:B.box((0,y,roof(y)+.065),(1.86,.055,.07),'Paint',.009)  for x in [-.62,0,.62]:   for j in range(12):B.box((x,yy-.59+j*.108,roof(yy)+.065),(.56,.054,.039),'Paint',.009,Matrix.Rotation(-.18,3,'X'))  for x in [-.90,.90]:   for y in [yy-.60,yy+.60]:B.rivet((x,y,roof(y)+.125),(0,0,1),.022)  part(B,'Grille_'+label) # Cab: tapered square at roof centre, real recessed windows in surrounding armour. # cab lower dimensions 1.66 x 1.50, top 1.46 x 1.28, top z3.28. for end in [-1,1]:  # face assembled around two deep vision ports, with sloped cheeks  yy=end*.73  H.box((0,yy,2.85),(1.65,.085,.16),'Paint',.01)  H.box((0,end*.652,3.235),(1.46,.085,.075),'Paint',.01)  for x in [-.71,0,.71]:H.box((x, end*.69,3.05),(.15,.11,.35),'Paint',.012)  for x in [-.36,.36]:   H.box((x,end*.645,3.07),(.51,.085,.23),'Interior',.014)   # closeable armoured flap sits above a dark slit   B=Build();B.box((x,end*.73,3.16),(.51,.055,.16),'Paint',.009,Matrix.Rotation(end*.13,3,'X'));B.cyl((x-.27,end*.75,3.25),(x+.27,end*.75,3.25),.022,'Weapons',12)   for xx in [x-.20,x+.20]:B.rivet((xx,end*.77,3.18),(0,end,0),.017)   part(B,f'CabFlap_{"Front" if end<0 else "Rear"}_{"L" if x>0 else "R"}') for s in [-1,1]:  H.plate([(s*.83,-.74,2.77),(s*.83,.74,2.77),(s*.73,.65,3.28),(s*.73,-.65,3.28)],.04)  B=Build();B.box((s*.795,0,3.065),(.052,.45,.255),'Paint',.012);B.box((s*.833,0,3.08),(.035,.32,.035),'Weapons',.006)  for yy in [-.17,.17]:B.cyl((s*.832,yy,2.99),(s*.832,yy,3.17),.022,'Weapons',10)  part(B,'CabFlap_'+('L' if s>0 else 'R'))  for yy in [-.66,.66]:   for z in [2.83,2.94,3.05,3.17]:H.rivet((s*(.83-(z-2.77)*.196+.015),yy,z),(s,0,.2),.018) # cab roof has actual hatch aperture and deep dark crew well. for x in [-.60,.60]:H.box((x,0,3.27),(.25,1.31,.05),'Paint',.008) for y in [-.56,.56]:H.box((0,y,3.27),(1.0,.20,.05),'Paint',.008) H.box((0,0,2.69),(1.20,1.15,.08),'Interior',.009) for x in [-.48,.48]:H.box((x,0,3.015),(.05,.90,.47),'Interior',.004) for y in [-.44,.44]:H.box((0,y,3.015),(1.0,.05,.47),'Interior',.004) B=Build();B.box((0,0,3.285),(.95,.88,.030),'Paint',.012) for x in [-.30,.30]:B.cyl((x,.42,3.27),(x+.12,.42,3.27),.025,'Weapons',12) B.tube([(-.12,-.03,3.30),(-.12,-.03,3.34),(.12,-.03,3.34),(.12,-.03,3.30)],.014,'Weapons',8) hatches.append(B.object('Hatch_Commander',(0,.42,3.27))) # two side access doors, with hinges and handle, detached door plates sit on full framed backing. for s in [-1,1]:  yy=-2.17;z=1.80;x=s*(sx(z)+.048)  H.box((x-s*.016,yy,z),(.045,.67,1.02),'Interior',.025)  B=Build();B.box((x+s*.03,yy,z),(.06,.61,.95),'Paint',.038)  for zz in [1.46,2.12]:   B.box((x+s*.072,yy-.25,zz),(.04,.13,.09),'Paint',.009);B.cyl((x+s*.093,yy-.28,zz-.065),(x+s*.093,yy-.28,zz+.065),.024,'Weapons',12)  B.tube([(x+s*.08,yy+.19,1.7),(x+s*.13,yy+.19,1.7),(x+s*.13,yy+.19,1.91),(x+s*.08,yy+.19,1.91)],.016,'Weapons',8)  part(B,'Door_'+('L' if s>0 else 'R'),(x,yy-.28,z))  # Long muffler + swept inlet elbow and outlet; proper fixing bands and mounts.  B=Build();xx=s*1.50  pts=[(s*1.41,-.73,1.03),(xx,-.48,1.07),(xx,-.25,1.26),(xx,.05,1.38),(xx,.26,1.40)]  B.tube(pts,.068,'Rust',14);B.cyl((xx,.18,1.4),(xx,1.50,1.4),.105,'Rust',20)  B.tube([(xx,1.50,1.4),(xx,1.66,1.39),(xx,1.84,1.31),(s*1.45,1.94,1.27)],.068,'Rust',14)  for y in [.26,1.42]:   B.cyl((xx,y-.025,1.4),(xx,y+.025,1.4),.117,'Weapons',18);H.box((s*1.42,y,1.42),(.13,.095,.28),'Paint',.01)  part(B,'Exhaust_'+('L' if s>0 else 'R')) # Gun trunnion / armoured ball, with barrel as a genuine child. G=Build();G.box((0,-3.22,1.93),(.69,.20,.67),'Paint',.036) G.cyl((0,-3.27,1.93),(0,-3.46,1.93),.265,'Weapons',32,r2=.23) G.cyl((0,-3.38,1.93),(0,-3.51,1.93),.166,'Paint',24) gun=G.object('Gun',(0,-3.27,1.93)) B=Build();B.cyl((0,-3.45,1.93),(0,-3.66,1.93),.108,'Weapons',24,r2=.091);B.cyl((0,-3.64,1.93),(0,-4.06,1.93),.072,'Weapons',24,r2=.063) # muzzle visible annulus + dark bore, not capped silver rod B.torus((0,-4.058,1.93),.049,.014,axis=(0,1,0),mat='Weapons',n=24,k=6);B.cyl((0,-4.055,1.93),(0,-4.059,1.93),.035,'Interior',20) barrel=B.object('Barrel',(0,-3.43,1.93));parent_keep(barrel,gun);empty('Muzzle',(0,-4.075,1.93),barrel) # Driver and loader visors are articulated armour with dark crew spaces behind. for x,label in [(-.91,'Loader'),(.91,'Driver')]:  H.box((x,-3.267,2.08),(.40,.10,.22),'Interior',.016)  B=Build();B.box((x,-3.342,2.12),(.43,.075,.16),'Paint',.014);B.box((x,-3.385,2.10),(.30,.018,.027),'Interior',.004);B.cyl((x-.24,-3.31,2.21),(x+.24,-3.31,2.21),.021,'Weapons',12)  hatches.append(B.object('Hatch_'+label,(x,-3.31,2.21))) # Three side machineguns each, two aft. Water-cooled jackets and small muzzle detail. mg_count=0 for s in [1,-1]:  for yy in [-1.20,.48,2.26]:   z=2.14;xx=s*(sx(z)+.065);H.box((xx,yy,z),(.065,.35,.33),'Interior',.012)   for yedge in [yy-.19,yy+.19]:H.box((xx+s*.025,yedge,z),(.045,.035,.39),'Paint',.007)   B=Build();B.cyl((xx,yy,z),(xx+s*.10,yy,z),.12,'Weapons',16,r2=.09);B.cyl((xx+s*.07,yy,z),(xx+s*.40,yy,z),.044,'Weapons',16);B.cyl((xx+s*.39,yy,z),(xx+s*.50,yy,z),.026,'Weapons',12)   for dd in [.13,.35]:B.cyl((xx+s*(dd-.012),yy,z),(xx+s*(dd+.012),yy,z),.050,'Weapons',16)   B.cyl((xx+s*.496,yy,z),(xx+s*.501,yy,z),.013,'Interior',12)   mg_count+=1;B.object('MG_'+str(mg_count),(xx,yy,z)) for x in [-.70,.70]:  yy=3.205;z=2.13;H.box((x,yy,z),(.31,.10,.31),'Interior',.013)  B=Build();B.cyl((x,yy,z),(x,yy+.12,z),.10,'Weapons',16);B.cyl((x,yy+.10,z),(x,yy+.46,z),.044,'Weapons',16);B.cyl((x,yy+.45,z),(x,yy+.53,z),.023,'Weapons',12)  mg_count+=1;B.object('MG_'+str(mg_count),(x,yy,z)) # Running gear: roadwheel bogies, idlers/sprockets, upper return rollers. for s,side in [(1,'L'),(-1,'R')]:  x=s*1.12  ys=[-2.84]+[-2.20+i*.44 for i in range(11)]+[2.84]  for idx,y in enumerate(ys):   r=.31 if idx in [0,12] else .235;z=.43 if idx in [0,12] else .31   B=Build();B.cyl((x-s*.22,y,z),(x+s*.22,y,z),r,'TrackSteel',24)   for sideOff in [-.205,.205]:B.torus((x+sideOff,y,z),r-.035,.031,axis=(1,0,0),mat='Weapons',n=24,k=6)   B.cyl((x+s*.22,y,z),(x+s*.248,y,z),r*.64,'TrackSteel',24);B.cyl((x+s*.248,y,z),(x+s*.28,y,z),r*.25,'Weapons',16)   for a in range(6):B.rivet((x+s*.269,y+cos(a*pi/3)*r*.43,z+sin(a*pi/3)*r*.43),(s,0,0),.013,'Weapons')   if idx in [0,12]:    for a in range(16):     aa=a*2*pi/16;B.box((x,y+cos(aa)*r,z+sin(aa)*r),(.30,.065,.060),'TrackSteel',.007,Matrix.Rotation(aa,3,'X'))   wheels.append(B.object(f'Wheel_{side}{idx+1}',(x,y,z)))  # three leaf sprung bogie assemblies  for y in [-1.76,0,1.76]:   H.box((x+s*.12,y,.42),(.13,1.35,.13),'TrackSteel',.015)   for k in range(4):H.box((x+s*.12,y,.52+k*.018),(.12,1.00-k*.14,.017),'TrackSteel',.004)   for yy in [y-.43,y+.43]:H.cyl((x+s*.12,yy,.35),(x+s*.12,yy,.67),.047,'Weapons',12)  for i,y in enumerate([-2.10,-.70,.70,2.10]):   B=Build();B.cyl((x-.19,y,.80),(x+.19,y,.80),.13,'TrackSteel',20);B.cyl((x+s*.19,y,.80),(x+s*.23,y,.80),.065,'Weapons',16);wheels.append(B.object(f'Wheel_{side}{14+i}',(x,y,.80))) # Continuous track path, rectangular pads individually bevelled. UV V advances exactly once around loop. # radius .40, straight length 5.56 => zmin=0 (pad thickness .07) TRACK_N=104 track_nodes={} def track_pt(t):  r=.40;half=2.78;per=4*half+2*pi*r;d=(t%1)*per  if d<2*half:return (-half+d,.035,0)  d-=2*half  if d<pi*r:   a=-pi/2+d/r;return (half+r*cos(a),.435+r*sin(a),a+pi/2)  d-=pi*r  if d<2*half:return (half-d,.835,pi)  d-=2*half;a=pi/2+d/r;return (-half+r*cos(a),.435+r*sin(a),a+pi/2) for s,side in [(1,'L'),(-1,'R')]:  B=Build();x=s*1.12  for i in range(TRACK_N):   y,z,angle=track_pt(i/TRACK_N);R=Matrix.Rotation(angle,3,'X')   start=len(B.f);B.box((x,y,z),(.49,.117,.069),'TrackSteel',.012,R)   B.box(Vector((x,y,z))+R@Vector((0,0,-.041)),(.51,.034,.025),'TrackSteel',.006,R)   # cast hinge knuckles, not rubber caterpillar rectangles   B.cyl(Vector((x-.25,y,z))+R@Vector((0,.053,0)),Vector((x+.25,y,z))+R@Vector((0,.053,0)),.023,'Weapons',8)   for k in range(start,len(B.f)):    coords=[]    for vi in B.f[k]:     local=R.transposed()@(Vector(B.v[vi])-Vector((x,y,z)));coords.append((local.x/.53+.5,(i+.5+local.y/.127)/TRACK_N))    B.uv[k]=coords  track_nodes[side]=B.object('Track_'+side) # Period-appropriate lamps tucked on rear brackets (small fittings, no invented modern equipment). for s in [-1,1]:  B=Build();B.box((s*1.15,3.22,1.37),(.12,.12,.21),'Weapons',.015);B.cyl((s*1.15,3.25,1.41),(s*1.15,3.31,1.41),.066,'Lamps',16)  part(B,'Lamp_'+('L' if s>0 else 'R')) hull=H.object('Hull') for name,loc in [('Seat_Commander',(0,0,3.0)),('Seat_Driver',(.6,-2.6,2.0)),('Exhaust',(1.50,1.94,1.27)),('Light_Head_L',(1.10,-3.28,1.45)),('Light_Head_R',(-1.10,-3.28,1.45)),('Fx_Engine',(0,1.8,2.68)),('Fx_Ammo',(0,.8,1.2)),('Fx_Hatch',(0,0,3.30))]:empty(name,loc) healthy=list(S.objects) # Drop unused material slots so glTF exports only the materials used by each mesh. def prune(o):  if o.type!='MESH':return  slots=list(o.data.materials);used=sorted(set(p.material_index for p in o.data.polygons));mapping={old:i for i,old in enumerate(used)};indices=[mapping[p.material_index] for p in o.data.polygons];o.data.materials.clear()  for j in used:o.data.materials.append(slots[j])  for p,i in zip(o.data.polygons,indices):p.material_index=i for o in healthy:prune(o) def triangles(obs):return sum(sum(len(p.vertices)-2 for p in o.data.polygons) for o in obs if o.type=='MESH') print('HEALTHY_TRIANGLES',triangles(healthy),flush=True)  def export(obs,path):  bpy.ops.object.select_all(action='DESELECT')  for o in obs:o.hide_set(False);o.select_set(True)  bpy.ops.export_scene.gltf(filepath=str(ROOT/path),export_format='GLB',use_selection=True,export_yup=True,export_apply=False,export_texcoords=True,export_normals=True,export_materials='EXPORT',export_image_format='AUTO',export_cameras=False,export_lights=False,export_extras=True)  # Set canonical linear tint explicitly (exporter's multiply recognition varies across versions).  p=ROOT/path;data=p.read_bytes();length,kind=struct.unpack_from('<II',data,12);j=json.loads(data[20:20+length]);binary=data[20+length:]  for m in j.get('materials',[]):   if m['name']=='Paint':m.setdefault('pbrMetallicRoughness',{})['baseColorFactor']=PAINTS[0][1]+[1]  text=json.dumps(j,separators=(',',':')).encode();text+=b' '*((-len(text))%4);p.write_bytes(struct.pack('<III',0x46546c67,2,20+len(text)+len(binary))+struct.pack('<II',len(text),0x4e4f534a)+text+binary)  print('EXPORTED',path,p.stat().st_size,flush=True) export(healthy,'a7v-tank.glb') # Damage twins derive directly from matching healthy parts, preserve their pivots. hd=empty('Hull_Damage',(0,0,0));td=empty('Turret_Damage',(0,0,0));damage=[hd,td];twins=[] def clone(o,name):  q=o.copy();q.data=o.data.copy();q.name=name;S.collection.objects.link(q);q.parent=None;q.matrix_world=o.matrix_world.copy();return q selected=[p for p in parts if any(k in p.name for k in ['Skirt_L2','Skirt_L3','Skirt_L5','Skirt_R2','Skirt_R4','Skirt_R6','Door_L','Door_R','Exhaust_L','Exhaust_R','Grille_Front','Grille_Rear','CabFlap_Front_L','CabFlap_Rear_R','CabFlap_L'])] for idx,o in enumerate(selected):  q=clone(o,o.name.replace('Part_','Dmg_'));bm=bmesh.new();bm.from_mesh(q.data)  # Cut a ragged wedge away at the lower corner of armour plates, then peel the edge.  if 'Skirt' in o.name or 'Door' in o.name:   coords=[v.co for v in bm.verts];ymax=max(v.y for v in coords);zmin=min(v.z for v in coords)   bmesh.ops.bisect_plane(bm,geom=list(bm.verts)+list(bm.edges)+list(bm.faces),dist=.0001,plane_co=(0,ymax-.11,zmin+.11),plane_no=(0,1,-1),clear_outer=True)  for v in bm.verts:   co=v.co   if 'Exhaust' in o.name:co.x+=.12*sin(co.y*2);co.z-=.14*(.6+sin(co.y))   elif 'Grille' in o.name:co.z+=.30*max(0,1-abs(co.x))*(.5+.5*sin(co.y*7))   else:    weight=max(0,(co.y+.6)/1.2);co.x+=(1 if o.location.x>=0 else -1)*(.11*weight+.045*sin(co.z*24));co.z-=.09*weight  bm.to_mesh(q.data);bm.free()  # Damage material darkened steel at torn edges is represented by strips below.  par=td if 'CabFlap' in o.name else hd;parent_keep(q,par);twins.append((o,q));damage.append(q) # Scar patches: disks sit 3mm above actual armour, metal petalled crater rims and black pits. scar_names=[] def scar_group(name,positions,normals):  B=Build()  for idx,(p,n) in enumerate(zip(positions,normals)):   p=Vector(p);n=Vector(n).normalized();q=n.to_track_quat('Z','Y');r=.055 if idx else .105   # asymmetric soot halo as a thin irregular disk   count=16;vv=[p+n*.0025]   for i in range(count):    a=2*pi*i/count;rad=r*(1.5+.30*sin(i*4.2));vv.append(p+q@Vector((rad*cos(a),rad*sin(a),.003)))   B.add(vv,[[0,i+1,(i+1)%count+1] for i in range(count)],'Burnt')   # open rim with black interior inset; raised petals catch glancing light   vv=[]   for ring in [0,1,2]:    for i in range(count):     a=2*pi*i/count;rr=r*[1,.57,.44][ring];zz=[.003,.013+(.020 if idx==0 else .009)*(1+sin(i*3)),.004][ring];vv.append(p+q@Vector((rr*cos(a),rr*sin(a),zz)))   B.add(vv,[[ring*count+i,ring*count+(i+1)%count,(ring+1)*count+(i+1)%count,(ring+1)*count+i] for ring in [0,1] for i in range(count)],'Scars')   B.cyl(p+n*.003,p+n*.004,r*.45,'Interior',16)   if idx>0:    B.tube([p+q@Vector((r*.7,0,.004)),p+q@Vector((r*1.9,r*.3,.004)),p+q@Vector((r*2.7,r*.6,.004))],.008,'Scars',6)  ob=B.object(name);prune(ob);parent_keep(ob,td if 'Turret' in name else hd);damage.append(ob);scar_names.append(name) for s,side in [(1,'L'),(-1,'R')]:  poses=[]  for yy,zz in [(-1.65,1.70),(-.50,2.30),(1.30,1.85),(2.7,2.2)]:poses.append((s*(sx(zz)+.029),yy,zz))  scar_group('Scar_Hull_'+side,poses,[(s,0,.1)]*4) for end,label in [(-1,'Front'),(1,'Rear')]:  positions=[]  for xx,zz in [(-.54,1.45),(.62,1.82),(.23,2.44),(-1.0,1.23)]:positions.append((xx,end*(3.38-(zz-.68)*.26/1.92+.018),zz))  scar_group('Scar_Hull_'+label,positions,[(0,end,.14)]*4) for s,label in [(1,'L'),(-1,'R')]:scar_group('Scar_Turret_'+label,[(s*.78,-.4,3.04),(s*.78,.34,3.02),(s*.78,.1,3.12)],[(s,0,.2)]*3) for end,label in [(-1,'Front'),(1,'Rear')]:scar_group('Scar_Turret_'+label,[(x,end*.75,2.87) for x in [-.5,0,.5]],[(0,end,.1)]*3) # Broken gun combines original mount with a bent, split barrel at the same pivot. q=clone(gun,'Gun_Broken');pieces=[q] bb=clone(barrel,'broken_barrel_temp') for v in bb.data.vertices:  world=bb.matrix_world@v.co  if world.y<-3.66:   d=-3.66-world.y;world.z-=.75*d;world.x+=.05*sin(d*8)   if d>.22:world.x+=.045*sin(v.index*2.3);world.z+=.04*cos(v.index*2.1)   v.co=bb.matrix_world.inverted()@world pieces.append(bb) bpy.ops.object.select_all(action='DESELECT') for o in pieces:o.select_set(True) bpy.context.view_layer.objects.active=q;bpy.ops.object.join();parent_keep(q,td);damage.append(q) # Snapped/derailed track copies: unlink a front arc; upper run sags and loose front links lie on ground. for side in ['L','R']:  orig=track_nodes[side];q=clone(orig,'Track_'+side+'_Broken')  for v in q.data.vertices:   y,z=v.co.y,v.co.z   if y<-2.48:    v.co.y=y-.30-(z/.85)*.95;v.co.z=max(.012,.035+(z-.435)*.03)   elif z>.48:v.co.z-=.38*(.5+.5*sin((y+2.7)/5.4*pi));v.co.x+=(.12 if side=='L' else -.12)*sin((y+2.7)/5.4*pi)  parent_keep(q,hd);damage.append(q) # Wreck: complete burnt hull, suspension sagged; cab roof blown open; no turret on this type. wreckpieces=[] omit={'Part_Skirt_L2','Part_Skirt_L3','Part_Skirt_R4','Part_Grille_Rear','Part_CabFlap_Front_L','Part_CabFlap_Rear_R'} for o in healthy:  if o.type!='MESH' or o.name in omit or o.name=='Barrel' or o.name=='Gun':continue  if o.name.startswith('Track_'):   if o.name=='Track_L':src=next(q for q in damage if q.name=='Track_L_Broken')   else:src=o  else:src=o  q=clone(src,'wreck_'+o.name)  if o.name.startswith('Hatch_'):   q.rotation_euler.rotate_axis('X',1.2)  if o.name.startswith('Wheel_'):q.location.z-=.05  if o.name=='Part_Grille_Front':q.rotation_euler.x=.24;q.location.z+=.16  if o.name.startswith('Part_CabFlap'):q.rotation_euler.y=.42;q.location.z+=.08  if o.name=='Hull':   for v in q.data.vertices:    if v.co.z>3.22:v.co.z+=.09*sin(v.co.y*10)+.035;v.co.x*=1.05  for v in q.data.vertices:   if v.co.z>.65:v.co.x+=.006*sin(v.co.z*17+v.co.y*11)  q.data.materials.clear();q.data.materials.append(MATS['Burnt'])  for p in q.data.polygons:p.material_index=0  wreckpieces.append(q) q=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun');q.parent=None;q.data.materials.clear();q.data.materials.append(MATS['Burnt']) for p in q.data.polygons:p.material_index=0 wreckpieces.append(q) bpy.ops.object.select_all(action='DESELECT') for o in wreckpieces:o.select_set(True) bpy.context.view_layer.objects.active=wreckpieces[0];bpy.ops.object.join();wreck=bpy.context.object;wreck.name='Wreck_Hull' # Move origin to ground centre without touching the mesh placement. mw=wreck.matrix_world.copy();wreck.data.transform(mw);wreck.matrix_world=Matrix.Identity(4) mod=wreck.modifiers.new('Wreck simplification','DECIMATE');mod.ratio=.44;bpy.context.view_layer.objects.active=wreck;bpy.ops.object.modifier_apply(modifier=mod.name) damage.append(wreck) # Damage materials conform to five-bucket contract, shared Paint preserved. for o in damage:  if o.type!='MESH':continue  for i,m in enumerate(o.data.materials):   if m.name in ['Weapons','Rust']:o.data.materials[i]=MATS['TrackSteel']   elif m.name in ['Interior','Lamps']:o.data.materials[i]=MATS['Burnt']  prune(o) print('DAMAGE_TRIANGLES',triangles(damage),flush=True) export(damage,'a7v-tank-damage.glb') # Metadata uses glTF axes, node pivots (world) and actual transformed bounds. def xyz(v):return [round(v.x,5),round(v.z,5),round(-v.y,5)] def manifest(obs):  bpy.context.view_layer.update();nodes=[];points=[]  for o in obs:   nodes.append({'name':o.name,'position':xyz(o.matrix_world.translation),'parent':o.parent.name if o.parent else None,'triangles':sum(len(p.vertices)-2 for p in o.data.polygons) if o.type=='MESH' else 0})   if o.type=='MESH':points.extend([o.matrix_world@Vector(p) for p in o.bound_box])  pp=[xyz(p) for p in points]  return {'nodes':nodes,'bounds':{'min':[min(p[i] for p in pp) for i in range(3)],'max':[max(p[i] for p in pp) for i in range(3)]},'triangles':triangles(obs)} meta={'contract':'tank-damage/v1','type':'A7V turretless','axes':{'forward':'+Z','up':'+Y','left':'+X'},'units':'metres','files':{'a7v-tank.glb':manifest(healthy),'a7v-tank-damage.glb':manifest(damage)},'paints':[{'name':name,'linear_rgb':col} for name,col in PAINTS],'damage':{'parts':[{'part':p.name,'twin':next((q.name for o,q in twins if o==p),None)} for p in parts],'scars':scar_names,'broken':{'Track_L':'Track_L_Broken','Track_R':'Track_R_Broken','Gun':'Gun_Broken'},'wreck':['Wreck_Hull'],'turretless':True},'rig':{'Gun':{'yaw_axis':'Y','yaw_degrees':[-25,25],'elevation_axis':'X'},'Barrel':{'recoil_axis':'Z'},'wheels':{'axis':'X'},'track_uv':'V runs once around the loop','machine_guns':8,'turret':None},'bakes':BAKES} (ROOT/'nodes.json').write_text(json.dumps(meta,indent=2)) # Save source scene then use clean glTF imports for all delivery render proofs. bpy.ops.wm.save_as_mainfile(filepath=str(ROOT/'a7v-source.blend')) for o in list(bpy.data.objects):bpy.data.objects.remove(o,do_unlink=True) bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank.glb'));A=list(S.objects) bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank-damage.glb'));D=[o for o in S.objects if o not in A] # Exported material tint is the proof source. Names can be suffixed by the importer. paintmats=[m for m in bpy.data.materials if m.name.startswith('Paint') and m.users] # neutral studio floor and broad natural daylight floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87 bpy.ops.mesh.primitive_plane_add(size=200,location=(0,0,-.035));floor=bpy.context.object;floor.name='StudioFloor';floor.data.materials.append(floorMat) S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5 ld=bpy.data.lights.new('Daylight','AREA');lo=bpy.data.objects.new('Daylight',ld);S.collection.objects.link(lo);lo.location=(5,-6,9);ld.energy=2100;ld.shape='DISK';ld.size=7 lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler() ld=bpy.data.lights.new('Rim','AREA');lo=bpy.data.objects.new('Rim',ld);S.collection.objects.link(lo);lo.location=(-4,3,6);ld.energy=1400;ld.size=6;lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler() camd=bpy.data.cameras.new('Camera');cam=bpy.data.objects.new('Camera',camd);S.collection.objects.link(cam);S.camera=cam camd.type='ORTHO';camd.ortho_scale=10.6 CAM=(9,-12,7.2);TARGET=(0,-.20,1.45) def camera(pos=CAM,target=TARGET,scale=10.6):cam.location=pos;cam.rotation_euler=(Vector(target)-cam.location).to_track_quat('-Z','Y').to_euler();camd.ortho_scale=scale camera() def show(obs,val):  for o in obs:o.hide_render=not val  def render(name,w=1920,h=1080,samples=24):  S.render.resolution_x=w;S.render.resolution_y=h;S.render.resolution_percentage=100;S.cycles.samples=samples;S.render.filepath=str(ROOT/name);bpy.ops.render.render(write_still=True) show(A,True);show(D,False) render('final.png') camera((10,0,3.1),(0,0,1.65),9.5);render('side.png',1920,1080,20) camera() clay=bpy.data.materials.new('ClayProof');clay.use_nodes=True;cp=clay.node_tree.nodes.get('Principled BSDF');cp.inputs['Base Color'].default_value=(.43,.43,.43,1);cp.inputs['Roughness'].default_value=.78 S.view_layers[0].material_override=clay;render('clay.png',1920,1080,16);S.view_layers[0].material_override=None # Mechanical pivot evidence: rotate every moving node 30 degrees in place; restore afterwards. moving=[o for o in A if o.name.startswith(('Wheel_','Hatch_','MG_')) or o.name in ['Gun','Barrel']] transforms={o.name:o.matrix_basis.copy() for o in moving} for o in moving:  o.rotation_euler.rotate_axis('Z' if o.name=='Gun' else 'X',pi/6) render('pivots.png',1280,720,12) for o in moving:o.matrix_basis=transforms[o.name] # Grid tiles are assembled via Blender image buffers, no external image package required. def grid(paths,out):  tiles=[bpy.data.images.load(str(ROOT/p),check_existing=False) for p in paths];w,h=tiles[0].size  canvas=np.ones((h*2,w*3,4),dtype=np.float32)  for i,im in enumerate(tiles):canvas[(1-i//3)*h:(2-i//3)*h,(i%3)*w:(i%3+1)*w]=np.asarray(im.pixels[:],dtype=np.float32).reshape(h,w,4)  im=bpy.data.images.new(out,w*3,h*2,alpha=True);im.pixels.foreach_set(canvas.ravel());im.filepath_raw=str(ROOT/out);im.file_format='PNG';im.save()  for t in tiles:bpy.data.images.remove(t) # recolour imported glTF materials via supported texture multiply sockets  def recolour(rgb):  for o in A:   if o.type!='MESH':continue   for m in o.data.materials:    if not m.name.startswith('Paint'):continue    nt=m.node_tree;p=next(n for n in nt.nodes if n.type=='BSDF_PRINCIPLED');sock=p.inputs['Base Color']    if sock.is_linked:     node=sock.links[0].from_node     if node.type=='MIX':      # importer uses multiply Mix colour B at socket 7      node.inputs[7].default_value=(*rgb,1)     elif node.type=='MIX_RGB':node.inputs[2].default_value=(*rgb,1)     elif node.type=='TEX_IMAGE':      tex=node;mul=nt.nodes.new('ShaderNodeMixRGB');mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*rgb,1);nt.links.new(tex.outputs['Color'],mul.inputs[1]);nt.links.new(mul.outputs[0],sock)    else:sock.default_value=(*rgb,1) for i,(name,rgb) in enumerate(PAINTS):  recolour(rgb);render(f'paint-{i}.png',640,360,12) grid([f'paint-{i}.png' for i in range(6)],'paints.png');recolour(PAINTS[0][1]) # Render exactly the imported exported nodes, turning states on/off only. def named(name,objs):return next((o for o in objs if o.name==name or o.name.split('.')[0]==name),None) for state in range(6):  show(A,state<4);show(D,False)  if state==1:   for n in scar_names:    o=named(n,D)    if o:o.hide_render=False   for p,q in twins[:6]:    named(p.name,A).hide_render=True;named(q.name,D).hide_render=False  elif state==2:   for o in A:    if o.name.startswith('Part_'):o.hide_render=True  elif state==3:   named('Track_L',A).hide_render=True;named('Track_L_Broken',D).hide_render=False   for n in ['Gun','Barrel']:named(n,A).hide_render=True   named('Gun_Broken',D).hide_render=False  elif state>=4:named('Wreck_Hull',D).hide_render=False  # State 6 equals turretless wreck: deliberately no fictitious detachable turret.  render(f'state-{state}.png',640,360,16) grid([f'state-{i}.png' for i in range(6)],'states.png') notes=[  'WWI German A7V-style turretless heavy tank reconstructed from sheet.jpg; movable gun, eight MGs, hatches, wheels, removable fittings and aligned damage/wreck assets.',  f'Triangles: healthy {meta["files"]["a7v-tank.glb"]["triangles"]:,}; damage {meta["files"]["a7v-tank-damage.glb"]["triangles"]:,}; uncompressed GLB meshes with metre units.',  'Materials: Paint, TrackSteel, Rubber, Weapons, Rust, Interior, Lamps; damage adds Burnt and Scars; Paint neutral baked texture × linear field-grey factor [0.19,0.22,0.19].',  'Textures: shared Cycles OptiX baked base/normal 1024px Paint, 512px others; ORM 512px; proof renders use re-imported GLBs.',  'Poly Haven CC0 ids: metal_plate, rusty_metal_03; https://polyhaven.com/license ; source maps downloaded from dl.polyhaven.org.',  'Differences: eight MGs follow written brief; no turret or Wreck_Turret (sixth state repeats turretless wreck); dimensions include protruding weapons beyond the armour footprint; weathering is shared tiling, not a unique historical vehicle.' ] (ROOT/'NOTES.md').write_text('\n'.join(notes)+'\n') print('BUILD_COMPLETE',flush=True) PY python3 -m py_compile build_a7v-tank.py scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/ ssh gex44 '/root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py' > /tmp/a7v-build.log 2>&1
 720779       00:34 ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py
 722052       00:01 ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python-expr "import bpy; bpy.ops.mesh.primitive_cube_add(); p=bpy.context.preferences.addons[\"cycles\"].preferences; p.compute_device_type=\"OPTIX\"; p.get_devices(); print([(d.name,d.type) for d in p.devices]); print(\"PREFLIGHT_OK\")"
 722106       00:00 /bin/bash -c ps -eo pid,etime,args | rg 'a7v|scp|ssh gex44' | head -20; ssh gex44 'ls -l /root/fal-author/a7v-tank-v1'
 722108       00:00 rg a7v|scp|ssh gex44
total 888
-rw-r--r-- 1 root root  41264 Oct 11 18:27 build_a7v-tank.py
-rw-r--r-- 1 root root 853091 Oct 11 18:20 ph-assets.json
-rw-r--r-- 1 root root    911 Oct 11 18:20 preflight.py
-rw-r--r-- 1 root root   1228 Oct 11 18:20 probe.glb

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/bin/bash -lc "ssh gex44 'ps -eo pid,etime,comm | grep -E \"blender|flock\"; head -5 /root/blender-spike/blender-5.2.0-linux-x64/blender'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 594ms:
1353205       00:44 blender.real
#!/bin/bash
# GPU gate shim (16 Sept 2026): every Blender run waits for a VRAM slot on the shared RTX 4000
# so biome builds cannot overlap Hunyuan or each other. The real binary is blender.real.
exec python3 /opt/gpu-gate/gpu_gate.py --name blender --need-mib 6000 --priority batch -- "$(dirname "$0")/blender.real" "$@"

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exec
/bin/bash -lc "python3 - <<'PY'
import json
j=json.load(open('/tmp/a7v-polyhaven-assets.json'))
for k in ['metal_plate','rusty_metal_03']: print(k,j[k].get('name'),j[k].get('categories'))
PY
curl -L -s -A 'Mozilla/5.0' -I https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/metal_plate/metal_plate_arm_1k.jpg | head -5
" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
metal_plate Metal Plate ['metal', 'floor', 'man made', 'indoor', 'outdoor', 'dirty']
rusty_metal_03 Rusty Metal 03 ['man made', 'metal']
HTTP/2 200 
date: Sun, 11 Oct 2026 16:27:52 GMT
content-type: image/jpeg
content-length: 1004043
strict-transport-security: max-age=63072000

codex
The GPU preflight passed. The full build is currently waiting in the machine’s shared GPU queue. I’m checking the script’s export and damage-state bookkeeping while it waits so the render run can finish without interruption.

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py'
s=open(p).read().replace(\"for o in list(bpy.data.objects):bpy.data.objects.remove(o,do_unlink=True)\",\"twin_names=[(o.name,q.name) for o,q in twins]\\nfor o in list(bpy.data.objects):bpy.data.objects.remove(o,do_unlink=True)\")
s=s.replace(\"for p,q in twins[:6]:\\n   named(p.name,A).hide_render=True;named(q.name,D).hide_render=False\",\"for pn,qn in twin_names[:6]:\\n   named(pn,A).hide_render=True;named(qn,D).hide_render=False\")
# Source hull shell normals all face outward; disconnected solids handled independently.
s=s.replace(\"me.update()\\n  ob=bpy.data.objects.new(name,me)\",\"me.update()\\n  ob=bpy.data.objects.new(name,me)\")
open(p,'w').write(s)
PY
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/
tail -10 /tmp/a7v-build.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 930ms:
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/bin/bash -lc "tail -12 /tmp/a7v-build.log; ssh gex44 'ls /root/fal-author/a7v-tank-v1/textures 2>/dev/null | head -5'; date -u '+%T'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 496ms:
16:28:27

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/bin/bash -lc "ssh gex44 'ps -eo pid,etime,comm | grep blender; ls -l /root/fal-author/a7v-tank-v1 | head'; tail -15 /tmp/a7v-build.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 506ms:
1363382       00:10 blender.real
total 892
-rw-r--r-- 1 root root  41309 Oct 11 18:28 build_a7v-tank.py
-rw-r--r-- 1 root root 853091 Oct 11 18:20 ph-assets.json
-rw-r--r-- 1 root root    911 Oct 11 18:20 preflight.py
-rw-r--r-- 1 root root   1228 Oct 11 18:20 probe.glb
drwxr-xr-x 2 root root   4096 Oct 11 18:28 textures
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Weapons
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Rust
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Interior
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Lamps

 exited 1 in 116682ms:
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/bin/bash -lc 'tail -12 /tmp/a7v-build.log' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
    pbr_metallic_roughness(mh)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^
  File "/root/blender-spike/blender-5.2.0-linux-x64/5.2/scripts/addons_core/io_scene_gltf2/blender/imp/pbrMetallicRoughness.py", line 162, in pbr_metallic_roughness
    iridescence_factor_socket=mh.settings_node.inputs['Iridescence Factor'] if mh.settings_node else None,
                              ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'bpy_prop_collection[key]: key "Iridescence Factor" not found'
Location: /root/fal-author/a7v-tank-v1/build_a7v-tank.py:506


Error: script failed, file: '/root/fal-author/a7v-tank-v1/build_a7v-tank.py', exiting.

Blender quit

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/bin/bash -lc "rg 'TRIANGLES|EXPORTED|Error|Warning' /tmp/a7v-build.log | tail -20; scp gex44:/root/fal-author/a7v-tank-v1/a7v-tank.glb gex44:/root/fal-author/a7v-tank-v1/a7v-tank-damage.glb gex44:/root/fal-author/a7v-tank-v1/nodes.json .; python3 /home/claude-agent/.agents/skills/blender-game-assets/scripts/audit_glb.py a7v-tank.glb --strict > /tmp/a7v-audit.json; head -60 /tmp/a7v-audit.json" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 3723ms:
00:00.567  cycles           | WARNING HIPEW initialization failed: Error opening HIP dynamic library
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:40: DeprecationWarning: 'Material.use_nodes' is expected to be removed in Blender 6.0
HEALTHY_TRIANGLES 97600
EXPORTED a7v-tank.glb 9311000
DAMAGE_TRIANGLES 85387
EXPORTED a7v-tank-damage.glb 8505012
KeyError: 'bpy_prop_collection[key]: key "Iridescence Factor" not found'
Error: Python: Traceback (most recent call last):
  File "/root/blender-spike/blender-5.2.0-linux-x64/5.2/scripts/addons_core/io_scene_glt... truncatedRuntimeError: Error: Python: Traceback (most recent call last):
KeyError: 'bpy_prop_collection[key]: key "Iridescence Factor" not found'
Error: script failed, file: '/root/fal-author/a7v-tank-v1/build_a7v-tank.py', exiting.
{
  "file": "a7v-tank.glb",
  "sha256": "2e353fc998c8cf7cca497a2a2faf6b95d912655349e3a0bdc7cc07fbe6d80034",
  "bytes": 9311000,
  "primitive_count": 152,
  "material_count": 6,
  "embedded_images": 18,
  "external_uris": [],
  "primitives": [
    {
      "mesh": "Barrel",
      "primitive": 0,
      "triangles": 472,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Barrel",
      "primitive": 1,
      "triangles": 76,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Gun",
      "primitive": 0,
      "triangles": 152,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Gun",
      "primitive": 1,
      "triangles": 124,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Hatch_Commander",
      "primitive": 0,
      "triangles": 60,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Hatch_Commander",
      "primitive": 1,
      "triangles": 148,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Hatch_Driver",
      "primitive": 0,
      "triangles": 60,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    },
    {
      "mesh": "Hatch_Driver",

codex
Both GLBs have exported: the healthy tank is 97,600 triangles and 9.31 MB; the damage file is 85,387 triangles and 8.51 MB. The render round-trip exposed a Blender 5.2 material-group naming conflict. I’m fixing that importer issue before judging the asset visually.

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p='build_a7v-tank.py';s=open(p).read();s=s.replace(\"bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank.glb'));A=list(S.objects)\",\"oldgroup=bpy.data.node_groups.get('glTF Material Output')\\nif oldgroup:oldgroup.name='Baked_Occlusion_Source'\\nbpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank.glb'));A=list(S.objects)\")
open(p,'w').write(s)
PY
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/
ssh gex44 '/root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py' > /tmp/a7v-build2.log 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "python3 - <<'PY'
import json,struct
p='a7v-tank.glb';b=open(p,'rb').read();n=struct.unpack_from('<I',b,12)[0];j=json.loads(b[20:20+n]);print([(m['name'],m.get('pbrMetallicRoughness')) for m in j['materials']]);a=json.load(open('/tmp/a7v-audit.json'));print('AUDIT', {k:v for k,v in a.items() if k not in ['primitives','images','materials']})
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
[('Weapons', {'baseColorTexture': {'index': 2}, 'metallicRoughnessTexture': {'index': 1}}), ('Interior', {'baseColorTexture': {'index': 5}, 'metallicRoughnessTexture': {'index': 4}}), ('Paint', {'baseColorTexture': {'index': 8}, 'metallicRoughnessTexture': {'index': 7}, 'baseColorFactor': [0.19, 0.22, 0.19, 1]}), ('TrackSteel', {'baseColorTexture': {'index': 11}, 'metallicRoughnessTexture': {'index': 10}}), ('Rust', {'baseColorTexture': {'index': 14}, 'metallicRoughnessTexture': {'index': 13}}), ('Lamps', {'baseColorTexture': {'index': 17}, 'metallicRoughnessTexture': {'index': 16}})]
AUDIT {'file': 'a7v-tank.glb', 'sha256': '2e353fc998c8cf7cca497a2a2faf6b95d912655349e3a0bdc7cc07fbe6d80034', 'bytes': 9311000, 'primitive_count': 152, 'material_count': 6, 'embedded_images': 18, 'external_uris': [], 'duplicate_primitives': [{'primitive': 'MG_3[1]', 'same_as': 'MG_1[1]'}, {'primitive': 'MG_6[1]', 'same_as': 'MG_4[1]'}], 'note': 'Mesh-local counts, before node transforms/instances. Degenerate threshold: cross-product magnitude < 1e-12 in asset units squared. Not a source-topology or visual-quality verdict.', 'triangles': 97600, 'zero_area_triangles': 96, 'nonfinite_attribute_components': 0, 'findings': ['zero_area_triangles', 'duplicate_primitives']}

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/bin/bash -lc "python3 - <<'PY'
import json
j=json.load(open('/tmp/a7v-audit.json'));print([p for p in j['primitives'] if p['zero_area_triangles']]);j=json.load(open('nodes.json'));print(j['files']['a7v-tank.glb']['bounds']);print(j['files']['a7v-tank-damage.glb']['bounds'])
PY
python3 /home/claude-agent/.agents/skills/blender-game-assets/scripts/audit_glb.py a7v-tank-damage.glb --strict > /tmp/a7v-damage-audit.json
python3 - <<'PY'
import json
j=json.load(open('/tmp/a7v-damage-audit.json'));print({k:j[k] for k in ['triangles','zero_area_triangles','findings']});print([p for p in j['primitives'] if p['zero_area_triangles']])
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 144ms:
[{'mesh': 'Hull', 'primitive': 3, 'triangles': 1380, 'zero_area_triangles': 48, 'nonfinite_attribute_components': 0}, {'mesh': 'Part_Door_L', 'primitive': 0, 'triangles': 180, 'zero_area_triangles': 24, 'nonfinite_attribute_components': 0}, {'mesh': 'Part_Door_R', 'primitive': 0, 'triangles': 180, 'zero_area_triangles': 24, 'nonfinite_attribute_components': 0}]
{'min': [-1.897, -0.0185, -3.735], 'max': [1.897, 3.35381, 4.07012]}
{'min': [-1.897, -0.0185, -3.735], 'max': [1.897, 3.45519, 4.24353]}
{'triangles': 85359, 'zero_area_triangles': 136, 'findings': ['zero_area_triangles']}
[{'mesh': 'Part_Door_L.001', 'primitive': 0, 'triangles': 178, 'zero_area_triangles': 20, 'nonfinite_attribute_components': 0}, {'mesh': 'Part_Door_R.001', 'primitive': 0, 'triangles': 178, 'zero_area_triangles': 20, 'nonfinite_attribute_components': 0}, {'mesh': 'Part_Skirt_R1.001', 'primitive': 0, 'triangles': 41539, 'zero_area_triangles': 96, 'nonfinite_attribute_components': 0}]

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/bin/bash -lc "tail -8 /tmp/a7v-build2.log; date -u '+%T'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
16:30:19

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"random.seed(74)\",\"random.seed(74)\\n# Reference dimensions refer to the armour envelope, excluding gun barrels.\\nDIM=Vector((3.07/2.96,7.34/6.81,1.0))\\ndef scaled(p):return Vector((p[0]*DIM.x,p[1]*DIM.y,p[2]*DIM.z))\")
s=s.replace(\"me.from_pydata([Vector(p)-Vector(pivot) for p in self.v]\",\"me.from_pydata([scaled(Vector(p)-Vector(pivot)) for p in self.v]\")
s=s.replace(\"ob.location=pivot\",\"ob.location=scaled(pivot)\")
s=s.replace(\"S.collection.objects.link(o);o.location=p\\n\",\"S.collection.objects.link(o);o.location=scaled(p)\\n\")
s=s.replace(\"(-.12,-.03,3.30),(-.12,-.03,3.34),(.12,-.03,3.34),(.12,-.03,3.30)],.014\",\"(-.12,-.03,3.28),(-.12,-.03,3.29),(.12,-.03,3.29),(.12,-.03,3.28)],.010\")
s=s.replace(\"return (-half+d,.035,0)\",\"return (-half+d,.0535,0)\").replace(\".435+r*sin(a)\",\".4535+r*sin(a)\").replace(\"return (half-d,.835,pi)\",\"return (half-d,.8535,pi)\")
# Collapsed bevel endpoints are removed without changing the intended shape.
s=s.replace(\"def prune(o):\\n if o.type"'!='"'MESH':return\", \"def prune(o):\\n if o.type"'!='"'MESH':return\\n bm=bmesh.new();bm.from_mesh(o.data);bmesh.ops.triangulate(bm,faces=list(bm.faces));bad=[f for f in bm.faces if f.calc_area()<1e-10]\\n if bad:bmesh.ops.delete(bm,geom=bad,context='FACES')\\n bm.to_mesh(o.data);bm.free()\")
# Registered envelope and limits; overall bounds retain true protruding weapons.
s=s.replace(\"'units':'metres','files'\", \"'units':'metres','armour_dimensions_m':{'length':7.34,'width':3.07,'height':3.30},'files'\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
codex
The exports are within both mesh and file-size budgets. The first audit found a few collapsed bevel triangles around thin fittings; I’m removing those. I’m also checking the armour envelope and track contact against the requested dimensions.

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/bin/bash -lc "tail -15 /tmp/a7v-build2.log; ssh gex44 'ls -lh /root/fal-author/a7v-tank-v1/final.png 2>/dev/null'; python3 - <<'PY'
import struct,json
for fn in ['a7v-tank.glb','a7v-tank-damage.glb']:
 b=open(fn,'rb').read();n=struct.unpack_from('<I',b,12)[0];j=json.loads(b[20:20+n]);print(fn, 'roots',[(j['nodes'][i]['name']) for i in j['scenes'][j['scene']]['nodes']][:10]);print('nodes',len(j['nodes']))
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 668ms:
a7v-tank.glb roots ['Exhaust', 'Fx_Ammo', 'Fx_Engine', 'Fx_Hatch', 'Gun', 'Hatch_Commander', 'Hatch_Driver', 'Hatch_Loader', 'Hull', 'Light_Head_L']
nodes 93
a7v-tank-damage.glb roots ['Hull_Damage', 'Turret_Damage', 'Wreck_Hull']
nodes 29

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/bin/bash -lc "ssh gex44 'ps -eo pid,etime,comm | grep blender; nvidia-smi --query-gpu=memory.used,utilization.gpu --format=csv,noheader'; tail -8 /tmp/a7v-build2.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 622ms:
1371972       00:54 blender.real
1375612       00:12 blender.real
8376 MiB, 32 %

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/bin/bash -lc "python3 - <<'PY'
import struct,json
from PIL import Image
from io import BytesIO
b=open('a7v-tank.glb','rb').read();n=struct.unpack_from('<I',b,12)[0];j=json.loads(b[20:20+n]);blob=b[28+n:]
can=Image.new('RGB',(768,256))
for col,name in enumerate(['Paint','TrackSteel','Rust']):
 m=next(m for m in j['materials'] if m['name']==name);ti=m['pbrMetallicRoughness']['baseColorTexture']['index'];ii=j['textures'][ti]['source'];v=j['bufferViews'][j['images'][ii]['bufferView']];im=Image.open(BytesIO(blob[v.get('byteOffset',0):v.get('byteOffset',0)+v['byteLength']])).convert('RGB');print(name,im.size);im.thumbnail((256,256));can.paste(im,(col*256,0))
can.save('/tmp/a7v-baked-swatches.png')
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 108ms:
Paint (1024, 1024)
TrackSteel (512, 512)
Rust (512, 512)

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"lk.new(mix.outputs[0],p.inputs['Base Color'])\\n nm=\", \"lk.new(mix.outputs[0],p.inputs['Base Color'])\\n if name=='Paint':\\n  uvsep=nt.nodes.new('ShaderNodeSeparateXYZ');lk.new(uv.outputs['UV'],uvsep.inputs[0])\\n  mudedge=nt.nodes.new('ShaderNodeMath');mudedge.operation='MULTIPLY_ADD';mudedge.inputs[1].default_value=.12;lk.new(noise.outputs['Fac'],mudedge.inputs[0]);lk.new(uvsep.outputs['Y'],mudedge.inputs[2])\\n  mudr=nt.nodes.new('ShaderNodeValToRGB');mudr.color_ramp.elements[0].position=.04;mudr.color_ramp.elements[0].color=(.20,.20,.19,1);mudr.color_ramp.elements[1].position=.32;mudr.color_ramp.elements[1].color=(1,1,1,1);lk.new(mudedge.outputs[0],mudr.inputs[0])\\n  dirty=nt.nodes.new('ShaderNodeMixRGB');dirty.blend_type='MULTIPLY';dirty.inputs[0].default_value=.80;lk.new(mix.outputs[0],dirty.inputs[1]);lk.new(mudr.outputs[0],dirty.inputs[2]);mix=dirty;lk.new(mix.outputs[0],p.inputs['Base Color'])\\n nm=\")
s=s.replace(\"coord=(v.y*.48,(v.z-.5)*.48)\",\"coord=(v.y*.48,(v.z-.58)/2.25 if v.z<2.80 else .30+(v.z-2.77)*.9)\").replace(\"coord=(v.x*.48,(v.z-.5)*.48)\",\"coord=(v.x*.48,(v.z-.58)/2.25 if v.z<2.80 else .30+(v.z-2.77)*.9)\")
# A narrower chassis under the removable skirts exposes upper belts and rollers.
s=s.replace(\"H.plate([(s*sx(.64),-3.28,.64),(s*sx(.64),3.28,.64),(s*sx(2.60),3.18,2.60),(s*sx(2.60),-3.18,2.60)],.055)\",\"H.plate([(s*sx(1.10),-3.28,1.10),(s*sx(1.10),3.28,1.10),(s*sx(2.60),3.18,2.60),(s*sx(2.60),-3.18,2.60)],.055)\\n H.box((s*.80,0,.82),(.13,6.1,.52),'TrackSteel',.018)\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -8 /tmp/a7v-build2.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
18:31:52 | INFO: Blender create Mesh node Scar_Turret_Rear
18:31:52 | INFO: Blender create Mesh node Part_Skirt_R1.001
18:31:52 | INFO: glTF import finished in 0.30s
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:513: DeprecationWarning: 'Material.use_nodes' is expected to be removed in Blender 6.0
  floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:515: DeprecationWarning: 'World.use_nodes' is expected to be removed in Blender 6.0
  S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5
00:28.650  render           | Saved: '/root/fal-author/a7v-tank-v1/final.png'

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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/final.png /tmp/a7v-final-v1.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 1165ms:
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codex
The first render has the right overall A7V shape, but it shows three areas to improve: the paint normal map is too wrinkled, the nose gun reads too short, and the exposed wheel row needs the reference’s three bogie housings. I’m refining those, plus the lower nose plates and exhaust bends.

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p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\".24 if name=='Paint' else .42\",\".055 if name=='Paint' else .30\")
s=s.replace(\"H.plate([(0,end*3.405,1.05),(s*1.47,end*3.405,.65),(s*1.30,end*3.14,1.02)],.04,'TrackSteel')\",\"H.plate([(0,end*3.405,1.05),(s*1.47,end*3.405,.65),(s*1.47,end*3.405,.60),(0,end*3.405,.60)],.035,'TrackSteel')\")
s=s.replace(\"(0,-4.06,1.93),.072,'Weapons',24,r2=.063\",\"(0,-4.25,1.93),.072,'Weapons',24,r2=.065\")
s=s.replace('-4.058','-4.248').replace('-4.055','-4.245').replace('-4.059','-4.249').replace('-4.075','-4.265')
s=s.replace(\"(.055,1.36,.07),'Paint',.009\",\"(.045,1.36,.035),'Paint',.007\").replace(\"(1.86,.055,.07),'Paint',.009\",\"(1.86,.045,.035),'Paint',.007\")
s=s.replace(\"(.56,.054,.039),'Paint',.009,Matrix.Rotation(-.18,3,'X')\",\"(.56,.058,.017),'Paint',.005,Matrix.Rotation(-.08,3,'X')\")
# Smooth elbow paths with interpolating Catmull-Rom curves.
s=s.replace(\"points=[Vector(p) for p in points];vv=[]\", \"points=[Vector(p) for p in points]\\n  if len(points)>3 and r>.04:\\n   src=points;points=[]\\n   for k in range(len(src)-1):\\n    p0=src[max(k-1,0)];p1=src[k];p2=src[k+1];p3=src[min(k+2,len(src)-1)]\\n    for j in range(5):\\n     t=j/5;points.append(.5*((2*p1)+(-p0+p2)*t+(2*p0-5*p1+4*p2-p3)*t*t+(-p0+3*p1-3*p2+p3)*t*t*t))\\n   points.append(src[-1])\\n  vv=[]\")
# Distinctive cast three-bogie running gear shield/yokes, visible between track belt and lower skirts.
s=s.replace(\"for k in range(4):H.box((x+s*.12,y,.52+k*.018)\",\"for a in range(32):\\n   a0=a*2*pi/32;a1=(a+1)*2*pi/32\\n   H.cyl((x+s*.29,y+.66*cos(a0),.35+.20*sin(a0)),(x+s*.29,y+.66*cos(a1),.35+.20*sin(a1)),.027,'TrackSteel',8)\\n  for off in [-.37,0,.37]:\\n   H.box((x+s*.28,y+off,.35),(.075,.20,.25),'TrackSteel',.019)\\n   H.box((x+s*.327,y+off,.39),(.033,.13,.115),'Weapons',.009)\\n   H.rivet((x+s*.35,y+off,.38),(s,0,0),.026,'TrackSteel')\\n  for k in range(4):H.box((x+s*.12,y,.52+k*.018)\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -8 /tmp/a7v-build2.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
01:03.750  render           | Saved: '/root/fal-author/a7v-tank-v1/state-1.png'
01:05.151  render           | Saved: '/root/fal-author/a7v-tank-v1/state-2.png'
01:06.549  render           | Saved: '/root/fal-author/a7v-tank-v1/state-3.png'
01:07.864  render           | Saved: '/root/fal-author/a7v-tank-v1/state-4.png'
01:09.237  render           | Saved: '/root/fal-author/a7v-tank-v1/state-5.png'
BUILD_COMPLETE

Blender quit

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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/states.png /tmp/a7v-states-v1.png
scp gex44:/root/fal-author/a7v-tank-v1/paints.png /tmp/a7v-paints-v1.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"track_nodes={}\\ndef track_pt\", \"track_nodes={};track_segments={}\\ndef track_pt\")
s=s.replace(\"B=Build();x=s*1.12\\n for i in range(TRACK_N):\", \"B=Build();x=s*1.12;track_segments[side]=[]\\n for i in range(TRACK_N):\\n  sv=len(B.v)\")
s=s.replace(\"B.uv[k]=coords\\n track_nodes\", \"B.uv[k]=coords\\n  track_segments[side].append((sv,len(B.v),x,y,z,angle))\\n track_nodes\")
old=\"\"\" for v in q.data.vertices:
  y,z=v.co.y,v.co.z
  if y<-2.48:
   v.co.y=y-.30-(z/.85)*.95;v.co.z=max(.012,.035+(z-.435)*.03)
  elif z>.48:v.co.z-=.38*(.5+.5*sin((y+2.7)/5.4*pi));v.co.x+=(.12 if side=='L' else -.12)*sin((y+2.7)/5.4*pi)
\"\"\"
new=\"\"\" for i,(sv,ev,x,y,z,angle) in enumerate(track_segments[side]):
  t=i/TRACK_N;newy,newz,newangle=y,z,angle;newx=x
  if t>.90:
   newy=-2.82-(t-.90)*14;newz=.0535;newangle=pi
  elif t>.50:
   u=(t-.50)/.40;newz=.8535-.40*sin(u*pi*.85)-.57*max(0,(u-.75)/.25);newz=max(.065,newz);newx+=.17*sin(u*pi)*(1 if side=='L' else -1);newangle=pi+.18*sin(u*pi*2)
  oldR=Matrix.Rotation(angle,3,'X');newR=Matrix.Rotation(newangle,3,'X')
  for vi in range(sv,ev):
   v=q.data.vertices[vi];raw=Vector((v.co.x/DIM.x,v.co.y/DIM.y,v.co.z));loc=oldR.transposed()@(raw-Vector((x,y,z)));v.co=scaled(newR@loc+Vector((newx,newy,newz)))
\"\"\"
assert old in s;s=s.replace(old,new)
s=s.replace(\"r=.055 if idx else .105\",\"r=.043 if idx else .083\").replace(\".013+(.020 if idx==0 else .009)\",\".007+(.008 if idx==0 else .004)\")
# Larger, structurally readable wreck damage, copied source roof torn open.
s=s.replace(\"if o.name.startswith('Part_CabFlap'):q.rotation_euler.y=.42;q.location.z+=.08\", \"if o.name.startswith('Part_CabFlap'):q.rotation_euler.y=.72;q.location.z+=.13\\n if o.name=='Part_Door_L':q.rotation_euler.z=.65;q.location.x+=.14\")
s=s.replace(\"if o.name=='Hull':\\n  for v\", \"if o.name=='Hull':\\n  bm=bmesh.new();bm.from_mesh(q.data);bad=[f for f in bm.faces if f.calc_center_median().y>1.00 and 2.48<f.calc_center_median().z<2.82 and abs(f.normal.z)>.85]\\n  bmesh.ops.delete(bm,geom=bad,context='FACES');bm.to_mesh(q.data);bm.free()\\n  for v\")
s=s.replace(\"if v.co.z>3.22:v.co.z+=.09*sin(v.co.y*10)+.035;v.co.x*=1.05\", \"if v.co.z>3.22:v.co.z+=.18*sin(v.co.y*10)+.08;v.co.x*=1.12\\n   if v.co.z>2.79 and v.co.x>.60:v.co.x+=.25*(v.co.z-2.79)/.5\")
s=s.replace(\"q=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun')\", \"B=Build()\\n# Jagged displaced engine-deck plates surround a dark engine cavity.\\nB.box((0,1.95,2.05),(1.9,1.9,.15),'Burnt',.015)\\nfor sg in [-1,1]:\\n B.plate([(sg*.15,.95,2.69),(sg*1.1,1.05,2.68),(sg*1.15,2.75,2.62),(sg*.37,2.35,3.03),(sg*.58,1.95,2.93),(sg*.22,1.5,3.13)],.032,'Burnt')\\nq=B.object('wreck_torn_deck');wreckpieces.append(q)\\nq=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun')\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/
ssh gex44 '/root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py' > /tmp/a7v-build3.log 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "date -u '+%T'; coord claim local:/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/ --note 'A7V revision 2 geometry/material refinements'; coord claim gex44:/root/fal-author/a7v-tank-v1/ --note 'A7V GPU build revision 2'; tail -5 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
16:34:48
claim local:/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/ (refreshed)
claim gex44:/root/fal-author/a7v-tank-v1/ (refreshed)

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
old=\"self.add(ps+[p-normal*thick for p in ps],[list(range(n)),list(reversed(range(n,2*n)))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)],mat)\"
new=\"\"\"vv=ps+[p-normal*thick for p in ps];ff=[list(range(n)),list(reversed(range(n,2*n)))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)]
  bm=bmesh.new();verts=[bm.verts.new(v) for v in vv]
  for face in ff:bm.faces.new([verts[i] for i in face])
  bmesh.ops.recalc_face_normals(bm,faces=list(bm.faces));bmesh.ops.bevel(bm,geom=list(bm.edges),offset=min(.004,thick*.2),segments=2,affect='EDGES',clamp_overlap=True)
  bm.verts.ensure_lookup_table();bm.verts.index_update();self.add([v.co.copy() for v in bm.verts],[[v.index for v in f.verts] for f in bm.faces],mat);bm.free()\"\"\"
assert old in s;s=s.replace(old,new)
s=s.replace(\"ybot=end*3.38;ytop=end*3.12\", \"ybot=end*3.38;ytop=end*3.12\\n for sg in [-1,1]:H.plate([(sg*sx(.64),end*3.28,.64),(sg*1.48,end*3.38,.68),(sg*1.275,end*3.12,2.60),(sg*sx(2.60),end*3.27,2.60)],.035)\")
s=s.replace(\"H.box((0,yy,2.85),(1.65,.085,.16),'Paint',.01)\",\"H.box((0,end*.725,2.85),(1.65,.085,.16),'Paint',.01,Matrix.Rotation(end*.17,3,'X'))\")
s=s.replace(\"H.box((x, end*.69,3.05),(.15,.11,.35),'Paint',.012)\",\"H.box((x, end*.69,3.05),(.15,.11,.35),'Paint',.012,Matrix.Rotation(end*.17,3,'X'))\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -8 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
codex
The six paint variants work on the exported material. The damage grid also revealed that the thrown track was deforming into a smooth strip. I’ve changed it to reposition rigid links and made the wreck’s roof rupture more visible. Removing the skirts will now expose the upper track run and return rollers.

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/bin/bash -lc "ssh gex44 'python3 -c \"from PIL import Image,ImageDraw,ImageFont; print(\\\"PIL_OK\\\")\"'; command -v gemini; tail -6 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 536ms:
PIL_OK
/home/claude-agent/bin/gemini

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"import bpy, bmesh, math, os, json, random, struct, urllib.request, sys\", \"import bpy, bmesh, math, os, json, random, struct, urllib.request, sys, subprocess\")
s=s.replace(\"for o in moving:\\n o.rotation_euler.rotate_axis('Z' if o.name=='Gun' else 'X',pi/6)\",\"for o in moving:\\n o.rotation_mode='XYZ';o.rotation_euler.rotate_axis('Z' if o.name=='Gun' or o.name.startswith('MG_') else 'X',pi/6)\")
s=s.replace(\"for t in tiles:bpy.data.images.remove(t)\",\"\"\"for t in tiles:bpy.data.images.remove(t)
 labels=[name.upper() for name,col in PAINTS] if out=='paints.png' else ['01  HEALTHY','02  HIT / SIX PANEL SWAPS','03  STRIPPED','04  IMMOBILISED / GUN DISABLED','05  BURNT WRECK','06  TURRETLESS WRECK / NO SEPARATE TURRET']
 code='from PIL import Image,ImageDraw,ImageFont; import sys,json; p=sys.argv[1]; im=Image.open(p).convert(\"RGB\"); d=ImageDraw.Draw(im); labels=json.loads(sys.argv[2]); font=ImageFont.truetype(\"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf\",14); w=im.width//3; h=im.height//2; [(d.rectangle((i%3*w,i//3*h+h-31,(i%3+1)*w,(i//3+1)*h),fill=(36,40,39)),d.text((i%3*w+15,i//3*h+h-23),s,font=font,fill=(224,229,225))) for i,s in enumerate(labels)]; im.save(p)'
 subprocess.run(['python3','-c',code,str(ROOT/out),json.dumps(labels)],check=True)\"\"\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -10 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "date -u '+%T'; ssh gex44 'ps -eo pid,etime,comm | grep blender; ls -l /root/fal-author/a7v-tank-v1/final.png'; tail -6 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 515ms:
16:36:37
1403679       00:08 blender.real
1404089       00:06 blender.real
-rw-r--r-- 1 root root 2426290 Oct 11 18:32 /root/fal-author/a7v-tank-v1/final.png

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/bin/bash -lc "cat > /tmp/a7v-validate.py <<'PY'
import struct,json,sys,io,math
from pathlib import Path
import numpy as np
from PIL import Image
root=Path(sys.argv[1]);reports={}
def load(p):
 b=p.read_bytes();ln=struct.unpack_from('<I',b,12)[0];return json.loads(b[20:20+ln]),b[28+ln:]
def arr(j,b,idx):
 a=j['accessors'][idx];v=j['bufferViews'][a['bufferView']];n={'SCALAR':1,'VEC2':2,'VEC3':3,'VEC4':4}[a['type']];dt={5126:'<f4',5125:'<u4',5123:'<u2',5121:'u1'}[a['componentType']];off=v.get('byteOffset',0)+a.get('byteOffset',0);return np.ndarray((a['count'],n),dtype=dt,buffer=b,offset=off,strides=(v.get('byteStride',np.dtype(dt).itemsize*n),np.dtype(dt).itemsize))
for fn in ['a7v-tank.glb','a7v-tank-damage.glb']:
 p=root/fn;j,b=load(p);names={n['name']:n for n in j['nodes']};tri=0;deg=0
 for m in j['meshes']:
  for prim in m['primitives']:
   pos=arr(j,b,prim['attributes']['POSITION']);ids=arr(j,b,prim['indices']).ravel().reshape(-1,3);pts=pos[ids];areas=np.linalg.norm(np.cross(pts[:,1]-pts[:,0],pts[:,2]-pts[:,0]),axis=1);deg+=int((areas<1e-12).sum());tri+=len(ids)
 dims=[]
 for im in j['images']:
  v=j['bufferViews'][im['bufferView']];data=b[v.get('byteOffset',0):v.get('byteOffset',0)+v['byteLength']];sz=Image.open(io.BytesIO(data)).size;dims.append(sz);assert max(sz)<=1024
 for m in j['materials']:
  if m['name']=='Paint':assert m['pbrMetallicRoughness']['baseColorFactor']==[.19,.22,.19,1]
  ti=m.get('pbrMetallicRoughness',{}).get('metallicRoughnessTexture',{}).get('index')
  if ti is not None:assert max(dims[j['textures'][ti]['source']])<=512
 assert p.stat().st_size<12*1024*1024
 assert len(j['materials'])<=10
 assert deg==0,(fn,deg)
 roots=[j['nodes'][i]['name'] for i in j['scenes'][j['scene']]['nodes']]
 if fn=='a7v-tank.glb':
  assert 80000<=tri<=140000
  for n in ['Hull','Gun','Barrel','Muzzle','Track_L','Track_R','Hatch_Commander','Hatch_Driver','Hatch_Loader','Seat_Commander','Seat_Driver','Exhaust','Light_Head_L','Light_Head_R','Fx_Engine','Fx_Ammo','Fx_Hatch']+[f'MG_{i}' for i in range(1,9)]:assert n in names,n
  assert 'Turret' not in names
  assert len([n for n in names if n.startswith('Part_')])>=14
 else:
  assert tri<=110000
  assert set(roots)=={'Hull_Damage','Turret_Damage','Wreck_Hull'},roots
  assert len([n for n in names if n.startswith('Dmg_')])>=8
 reports[fn]={'triangles':tri,'degenerate_triangles':deg,'nodes':len(names),'materials':[m['name'] for m in j['materials']],'bytes':p.stat().st_size,'max_texture':max(max(d) for d in dims),'roots':roots}
print(json.dumps(reports,indent=2))
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "tail -15 /tmp/a7v-build3.log; date -u '+%T'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
16:37:42

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"q=clone(o,o.name.replace('Part_','Dmg_'));bm=\", \"q=clone(o,o.name.replace('Part_','Dmg_Turret_' if 'CabFlap' in o.name else 'Dmg_'));bm=\")
s=s.replace(\"part(B,'Door_'+('L' if s>0 else 'R'),(x,yy-.28,z))\", \"part(B,'Door_'+('L' if s>0 else 'R'))\")
s=s.replace(\"newy=-2.82-(t-.90)*14;newz=.0535;newangle=pi\", \"newy=-2.82-(t-.90)*14;newz=.0345;newangle=pi\")
s=s.replace(\"gun=G.object('Gun',(0,-3.27,1.93))\", \"gun=G.object('Gun',(0,-3.27,1.93));gun['yaw_axis']='Y';gun['yaw_limits_degrees']=[-25,25];gun['elevation_axis']='X'\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -5 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
codex
The revised geometry is waiting for its GPU slot. The export checks cover the required nodes, three turretless damage roots, texture limits, paint factor, and mesh budgets. The first paint grid confirms that recolouring affects the armour while leaving the exhausts, tracks, weapons, and fittings unchanged.

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/bin/bash -lc "ssh gex44 'ps -eo pid,etime,comm | grep blender'; tail -10 /tmp/a7v-build3.log; date -u '+%T'" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 537ms:
1412313       00:35 blender.real
16:38:40

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"3.07/2.96,7.34/6.81\",\"3.07/3.038,7.34/6.845\")
s=s.replace(\"vv=ps+[p-normal*thick for p in ps]\", \"vv=[p+normal*thick*.5 for p in ps]+[p-normal*thick*.5 for p in ps]\")
s=s.replace(\"H.plate([(s*sx(1.10),-3.28,1.10),(s*sx(1.10),3.28,1.10),(s*sx(2.60),3.18,2.60),(s*sx(2.60),-3.18,2.60)],.055)\",\"H.plate([(s*(sx(1.10)-.06),-3.28,1.10),(s*(sx(1.10)-.06),3.28,1.10),(s*(sx(2.60)-.06),3.18,2.60),(s*(sx(2.60)-.06),-3.18,2.60)],.055)\")
s=s.replace(\"(s*(sx(zz)+.024),yy,zz)\",\"(s*(sx(zz)+.047),yy,zz)\")
s=s.replace(\"yy+end*.017,z\",\"yy+end*.040,z\").replace(\"yy+end*.025,z\",\"yy+end*.040,z\")
s=s.replace(\"H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015)\",\"H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015)\\n for k in range(15):H.box((-.80+k*.114,yy,roof(yy)+.048),(.032,1.18,.014),'Weapons',.003)\")
# Recessed side scratch/chip fragments on exposed plate edges (shared gunmetal).
s=s.replace(\"# floor and longitudinal chassis\", \"\"\"# Small random abrasions expose steel; localised near seams rather than blanket noise.
for sg in [-1,1]:
 for i in range(95):
  yy=random.uniform(-3.0,3.0);zz=random.uniform(1.17,2.50);length=random.uniform(.025,.095);xx=sg*(sx(zz)+.0285)
  H.add([(xx,yy,zz),(xx,yy+.006,zz+.006),(sg*(sx(zz+length)+.0285),yy+.013,zz+length)],[[0,1,2]],'Weapons')
# floor and longitudinal chassis\"\"\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -12 /tmp/a7v-build3.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:558: DeprecationWarning: 'World.use_nodes' is expected to be removed in Blender 6.0
  S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5
00:27.022  render           | Saved: '/root/fal-author/a7v-tank-v1/final.png'
00:38.841  render           | Saved: '/root/fal-author/a7v-tank-v1/side.png'
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:576: DeprecationWarning: 'Material.use_nodes' is expected to be removed in Blender 6.0
  clay=bpy.data.materials.new('ClayProof');clay.use_nodes=True;cp=clay.node_tree.nodes.get('Principled BSDF');cp.inputs['Base Color'].default_value=(.43,.43,.43,1);cp.inputs['Roughness'].default_value=.78
00:48.209  render           | Saved: '/root/fal-author/a7v-tank-v1/clay.png'
00:52.352  render           | Saved: '/root/fal-author/a7v-tank-v1/pivots.png'
00:53.860  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-0.png'
00:55.390  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-1.png'
00:56.862  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-2.png'
00:58.368  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-3.png'

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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/final.png /tmp/a7v-final-v2.png
scp gex44:/root/fal-author/a7v-tank-v1/side.png /tmp/a7v-side-v2.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "tail -4 /tmp/a7v-build3.log; rg -n 'grille|camera.location|Side|side.png|for idx, yy' build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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01:10.454  render           | Saved: '/root/fal-author/a7v-tank-v1/state-5.png'
BUILD_COMPLETE

Blender quit
240:# Engine deck grilles: separate louvres above solid dark fins and lined engine well.
585:camera((10,0,3.1),(0,0,1.65),9.5);render('side.png',1920,1080,20)

codex
The tank now has the right tall hull, low tracks and grouped running gear. I’m refining the grille fit and checking the exported damage states, moving pivots and texture budgets before the final clean build.

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/bin/bash -lc "sed -n '230,267p' build_a7v-tank.py; sed -n '570,650p' build_a7v-tank.py; cat /home/claude-agent/.agents/skills/blender-game-assets/references/critic-loop.md" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 exited 1 in 0ms:
 for s in [-1,1]:
  H.plate([(0,end*3.405,1.05),(s*1.47,end*3.405,.65),(s*1.47,end*3.405,.60),(0,end*3.405,.60)],.035,'TrackSteel')
  B=Build();B.box((s*1.36,end*3.25,.70),(.21,.41,.075),'Paint',.014);B.box((s*1.43,end*3.34,.58),(.06,.17,.27),'Paint',.013);part(B,f'Fender_{"F" if end<0 else "R"}{"L" if s>0 else "R"}')
  B=Build();B.torus((s*1.01,end*3.38,.93),.092,.025,axis=(1,0,0),mat='Weapons',n=20,k=6);B.box((s*1.01,end*3.32,.94),(.07,.15,.23),'Paint',.01);part(B,f'Tow_{"Front" if end<0 else "Rear"}_{s}')
# Roof fore/aft sloped armour; cab base sits in centre.
for a,b in [(-3.12,-.74),(.74,3.12)]:
 H.plate([(-sx(roof(a)),a,roof(a)),(sx(roof(a)),a,roof(a)),(sx(roof(b)),b,roof(b)),(-sx(roof(b)),b,roof(b))],.05)
 for yy in [a+.055,b-.055]:
  for i in range(17):H.rivet((-1.17+i*.146,yy,roof(yy)+.018),(0,0,1),.019)
for x in [-1.05,1.05]:H.box((x,0,2.74),(.42,1.55,.075),'Paint',.012)
# Engine deck grilles: separate louvres above solid dark fins and lined engine well.
for yy,label in [(-2.05,'Front'),(2.05,'Rear')]:
 H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015)
 for k in range(15):H.box((-.80+k*.114,yy,roof(yy)+.048),(.032,1.18,.014),'Weapons',.003)
 B=Build()
 for x in [-.91,.91]:B.box((x,yy,roof(yy)+.08),(.045,1.36,.035),'Paint',.007)
 for y in [yy-.67,yy+.67]:B.box((0,y,roof(y)+.065),(1.86,.045,.035),'Paint',.007)
 for x in [-.62,0,.62]:
  for j in range(12):B.box((x,yy-.59+j*.108,roof(yy)+.065),(.56,.058,.017),'Paint',.005,Matrix.Rotation(-.08,3,'X'))
 for x in [-.90,.90]:
  for y in [yy-.60,yy+.60]:B.rivet((x,y,roof(y)+.125),(0,0,1),.022)
 part(B,'Grille_'+label)
# Cab: tapered square at roof centre, real recessed windows in surrounding armour.
# cab lower dimensions 1.66 x 1.50, top 1.46 x 1.28, top z3.28.
for end in [-1,1]:
 # face assembled around two deep vision ports, with sloped cheeks
 yy=end*.73
 H.box((0,end*.725,2.85),(1.65,.085,.16),'Paint',.01,Matrix.Rotation(end*.17,3,'X'))
 H.box((0,end*.652,3.235),(1.46,.085,.075),'Paint',.01)
 for x in [-.71,0,.71]:H.box((x, end*.69,3.05),(.15,.11,.35),'Paint',.012,Matrix.Rotation(end*.17,3,'X'))
 for x in [-.36,.36]:
  H.box((x,end*.645,3.07),(.51,.085,.23),'Interior',.014)
  # closeable armoured flap sits above a dark slit
  B=Build();B.box((x,end*.73,3.16),(.51,.055,.16),'Paint',.009,Matrix.Rotation(end*.13,3,'X'));B.cyl((x-.27,end*.75,3.25),(x+.27,end*.75,3.25),.022,'Weapons',12)
  for xx in [x-.20,x+.20]:B.rivet((xx,end*.77,3.18),(0,end,0),.017)
  part(B,f'CabFlap_{"Front" if end<0 else "Rear"}_{"L" if x>0 else "R"}')
for s in [-1,1]:
 H.plate([(s*.83,-.74,2.77),(s*.83,.74,2.77),(s*.73,.65,3.28),(s*.73,-.65,3.28)],.04)
ld=bpy.data.lights.new('Daylight','AREA');lo=bpy.data.objects.new('Daylight',ld);S.collection.objects.link(lo);lo.location=(5,-6,9);ld.energy=2100;ld.shape='DISK';ld.size=7
lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler()
ld=bpy.data.lights.new('Rim','AREA');lo=bpy.data.objects.new('Rim',ld);S.collection.objects.link(lo);lo.location=(-4,3,6);ld.energy=1400;ld.size=6;lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler()
camd=bpy.data.cameras.new('Camera');cam=bpy.data.objects.new('Camera',camd);S.collection.objects.link(cam);S.camera=cam
camd.type='ORTHO';camd.ortho_scale=10.6
CAM=(9,-12,7.2);TARGET=(0,-.20,1.45)
def camera(pos=CAM,target=TARGET,scale=10.6):cam.location=pos;cam.rotation_euler=(Vector(target)-cam.location).to_track_quat('-Z','Y').to_euler();camd.ortho_scale=scale
camera()
def show(obs,val):
 for o in obs:o.hide_render=not val

def render(name,w=1920,h=1080,samples=24):
 S.render.resolution_x=w;S.render.resolution_y=h;S.render.resolution_percentage=100;S.cycles.samples=samples;S.render.filepath=str(ROOT/name);bpy.ops.render.render(write_still=True)
show(A,True);show(D,False)
render('final.png')
camera((10,0,3.1),(0,0,1.65),9.5);render('side.png',1920,1080,20)
camera()
clay=bpy.data.materials.new('ClayProof');clay.use_nodes=True;cp=clay.node_tree.nodes.get('Principled BSDF');cp.inputs['Base Color'].default_value=(.43,.43,.43,1);cp.inputs['Roughness'].default_value=.78
S.view_layers[0].material_override=clay;render('clay.png',1920,1080,16);S.view_layers[0].material_override=None
# Mechanical pivot evidence: rotate every moving node 30 degrees in place; restore afterwards.
moving=[o for o in A if o.name.startswith(('Wheel_','Hatch_','MG_')) or o.name in ['Gun','Barrel']]
transforms={o.name:o.matrix_basis.copy() for o in moving}
for o in moving:
 o.rotation_mode='XYZ';o.rotation_euler.rotate_axis('Z' if o.name=='Gun' or o.name.startswith('MG_') else 'X',pi/6)
render('pivots.png',1280,720,12)
for o in moving:o.matrix_basis=transforms[o.name]
# Grid tiles are assembled via Blender image buffers, no external image package required.
def grid(paths,out):
 tiles=[bpy.data.images.load(str(ROOT/p),check_existing=False) for p in paths];w,h=tiles[0].size
 canvas=np.ones((h*2,w*3,4),dtype=np.float32)
 for i,im in enumerate(tiles):canvas[(1-i//3)*h:(2-i//3)*h,(i%3)*w:(i%3+1)*w]=np.asarray(im.pixels[:],dtype=np.float32).reshape(h,w,4)
 im=bpy.data.images.new(out,w*3,h*2,alpha=True);im.pixels.foreach_set(canvas.ravel());im.filepath_raw=str(ROOT/out);im.file_format='PNG';im.save()
 for t in tiles:bpy.data.images.remove(t)
 labels=[name.upper() for name,col in PAINTS] if out=='paints.png' else ['01  HEALTHY','02  HIT / SIX PANEL SWAPS','03  STRIPPED','04  IMMOBILISED / GUN DISABLED','05  BURNT WRECK','06  TURRETLESS WRECK / NO SEPARATE TURRET']
 code='from PIL import Image,ImageDraw,ImageFont; import sys,json; p=sys.argv[1]; im=Image.open(p).convert("RGB"); d=ImageDraw.Draw(im); labels=json.loads(sys.argv[2]); font=ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",14); w=im.width//3; h=im.height//2; [(d.rectangle((i%3*w,i//3*h+h-31,(i%3+1)*w,(i//3+1)*h),fill=(36,40,39)),d.text((i%3*w+15,i//3*h+h-23),s,font=font,fill=(224,229,225))) for i,s in enumerate(labels)]; im.save(p)'
 subprocess.run(['python3','-c',code,str(ROOT/out),json.dumps(labels)],check=True)
# recolour imported glTF materials via supported texture multiply sockets

def recolour(rgb):
 for o in A:
  if o.type!='MESH':continue
  for m in o.data.materials:
   if not m.name.startswith('Paint'):continue
   nt=m.node_tree;p=next(n for n in nt.nodes if n.type=='BSDF_PRINCIPLED');sock=p.inputs['Base Color']
   if sock.is_linked:
    node=sock.links[0].from_node
    if node.type=='MIX':
     # importer uses multiply Mix colour B at socket 7
     node.inputs[7].default_value=(*rgb,1)
    elif node.type=='MIX_RGB':node.inputs[2].default_value=(*rgb,1)
    elif node.type=='TEX_IMAGE':
     tex=node;mul=nt.nodes.new('ShaderNodeMixRGB');mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*rgb,1);nt.links.new(tex.outputs['Color'],mul.inputs[1]);nt.links.new(mul.outputs[0],sock)
   else:sock.default_value=(*rgb,1)
for i,(name,rgb) in enumerate(PAINTS):
 recolour(rgb);render(f'paint-{i}.png',640,360,12)
grid([f'paint-{i}.png' for i in range(6)],'paints.png');recolour(PAINTS[0][1])
# Render exactly the imported exported nodes, turning states on/off only.
def named(name,objs):return next((o for o in objs if o.name==name or o.name.split('.')[0]==name),None)
for state in range(6):
 show(A,state<4);show(D,False)
 if state==1:
  for n in scar_names:
   o=named(n,D)
   if o:o.hide_render=False
  for pn,qn in twin_names[:6]:
   named(pn,A).hide_render=True;named(qn,D).hide_render=False
 elif state==2:
  for o in A:
   if o.name.startswith('Part_'):o.hide_render=True
 elif state==3:
  named('Track_L',A).hide_render=True;named('Track_L_Broken',D).hide_render=False
  for n in ['Gun','Barrel']:named(n,A).hide_render=True
  named('Gun_Broken',D).hide_render=False
 elif state>=4:named('Wreck_Hull',D).hide_render=False
 # State 6 equals turretless wreck: deliberately no fictitious detachable turret.
 render(f'state-{state}.png',640,360,16)
grid([f'state-{i}.png' for i in range(6)],'states.png')
notes=[
 'WWI German A7V-style turretless heavy tank reconstructed from sheet.jpg; movable gun, eight MGs, hatches, wheels, removable fittings and aligned damage/wreck assets.',
 f'Triangles: healthy {meta["files"]["a7v-tank.glb"]["triangles"]:,}; damage {meta["files"]["a7v-tank-damage.glb"]["triangles"]:,}; uncompressed GLB meshes with metre units.',
 'Materials: Paint, TrackSteel, Rubber, Weapons, Rust, Interior, Lamps; damage adds Burnt and Scars; Paint neutral baked texture × linear field-grey factor [0.19,0.22,0.19].',
cat: /home/claude-agent/.agents/skills/blender-game-assets/references/critic-loop.md: No such file or directory

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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/states.png /tmp/a7v-states-v2.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'rg --files /home/claude-agent/.agents/skills/blender-game-assets | head -20; command -v gemini' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
/home/claude-agent/.agents/skills/blender-game-assets/reference/build_hull.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/cinematic.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/build_rocks.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/INDEX.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/clay.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/preflight-and-recovery.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/critic-loop.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/gen_material.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/runtime-parity-and-diagnostics.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/car-paint-flakes.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/cabinlib.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/matlib.py
/home/claude-agent/.agents/skills/blender-game-assets/SKILL.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/furniture-reconstruction.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/pack_leaf.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/terrain-erosion.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/baking-and-diagnostics.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/asset-delivery.md
/home/claude-agent/.agents/skills/blender-game-assets/reference/build_tender.py
/home/claude-agent/.agents/skills/blender-game-assets/reference/high-to-low-baking.md
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/bin/bash -lc "cat /home/claude-agent/.agents/skills/blender-game-assets/reference/critic-loop.md; sed -n '1,85p' build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
<!-- Distilled from vercel-labs/vgpu .claude/skills/vgpu-agent-flow/references/asset-iteration.md and
.subharness/agents/asset-author.ts + asset-critic.ts at commit 68cb1d8d198c (MIT, Copyright (c) 2025 Vercel, Inc.),
rewritten for Forge lanes (forge-agent, Astra author, a second model family as critic). -->

# Author and critic loop for a Blender asset

Use this for any authored asset that will be judged by eye: a hero prop, a character, a building, an
environment. Skip it for a mechanical re-export.

## Seats

| Seat | Who | Owns |
| --- | --- | --- |
| Author | Astra (operator law: Blender work goes to Astra) | Geometry, authored materials, UVs, bakes, Blender renders, the export |
| Runtime | The root, or one worker when the shader work is real | Loading the export in the game's actual three.js path, captures, measured costs |
| Critic | A different model family from the author, reading the real images | Findings only. Never edits the asset |

The critic must open the actual capture files. A critic that cannot read images says so and returns
BLOCKED; it never writes a visual verdict from metrics or from the author's description.

## Budget

- Default: **3 revisions, at most 2 critic passes per revision.** The brief may set another cap.
- A cap is an execution limit, not acceptance. Cap reached with open visual findings = `REVISE`
  reported as such, never a `PASS`.
- No unattended improvement loop past the cap.

## Before the first render

Write in the task folder: scope, target cameras (gameplay view, hero, rear, closest required view),
output paths, budgets (triangles, exported vertices, texture bytes and GPU memory, draw calls) and
the revision cap. Budgets are task inputs; do not copy another asset's numbers.

Run the [preflight](preflight-and-recovery.md) once: Blender starts and runs a scene operation, a
tiny bake and export round-trips through the real loader, one real runtime frame is captured.

Integrate a cheap LOW blockout in the runtime at this stage. Scale, axis, camera and material
contract problems are found before an expensive bake, not after.

## Each revision keeps

- the source revision or parameters that rebuild the previous asset;
- real hero, rear and close-up captures, same camera, light, exposure and pose every time;
- triangles, exported vertices, primitives, material count, file bytes, texture GPU memory;
- runtime draw counters, kept apart from offline estimates;
- the critic's findings, the fixes chosen, and the next measured result.

## The critic pass

The critic receives the previous AND the current captures and metrics under matched cameras (or
an explicit "first revision, no baseline"), the reference image, and the brief. It returns:

- **at most five findings**, ordered by impact, each with a stable id, the evidence path (whole
  view plus crop or image coordinates), the visible symptom, a suggested correction and a
  **measurable acceptance condition**;
- regressions against the previous revision;
- resolved / remaining / regressed status of earlier findings on a follow-up pass;
- `PASS`, `REVISE` or `BLOCKED`, with the limits of its evidence.

It compares against the reference as well as the previous revision: clean topology and progress
since last time do not make the asset match the reference. It separates the observed defect from
the suspected cause. A small whole-image difference can hide severe local damage (thin trim,
stairs, silhouette edges): it inspects crops at each delivered LOD. Design ideas are suggestions,
not new acceptance requirements.

When the cause could be the asset or the renderer, it asks for the diagnostic captures in
[runtime parity](runtime-parity-and-diagnostics.md) (maps off, AO neutral, lightmap off) rather
than guessing.

## Rules that stop false passes

- A generated concept image is never proof of a working model. Label concepts as concepts; accept
  only on real renders of the real export.
- Requested bakes need bake provenance (what was baked, from what, at what settings) and matched
  runtime captures with each contribution switched off in turn. Vertex tint and runtime shadows
  are not substitutes for a requested AO or lightmap bake.
- An atlas repair is checked on the full matched views, not only on the crop that was broken: a new
  layout can fix one edge and turn another face black.
- One writer per handoff file. A reply never gets appended to a request file another agent will
  regenerate. Superseded manifests and failed captures stay on disk.
- The author hands the root a compact result: verdict, the few decisive images, the metrics table.
  Full capture sets stay on disk; the root does not load every image.
- A user's rejection or a changed brief reopens any earlier `PASS`.

## Lessons

When a revision teaches something that will recur, write it as: evidence path, symptom, cause,
intervention, matched before/after result, scope. The root checks it and makes a narrow edit to this
skill. Reject task-specific style preferences dressed up as general rules.
"""A7V game asset. Blender 5.2: -b --python-exit-code 1 --python build_a7v-tank.py
Clean build includes CC0 downloads, Cycles GPU material bakes, two exports and import proofs.
Authoring coordinates: X left, -Y forward, Z up. glTF conversion produces X left,Y up,Z forward.
"""
import bpy, bmesh, math, os, json, random, struct, urllib.request, sys, subprocess
from pathlib import Path
from mathutils import Vector, Matrix
from math import sin,cos,pi
import numpy as np
ROOT=Path(__file__).resolve().parent
TEX=ROOT/'textures'; TEX.mkdir(exist_ok=True)
random.seed(74)
# Reference dimensions refer to the armour envelope, excluding gun barrels.
DIM=Vector((3.07/3.038,7.34/6.845,1.0))
def scaled(p):return Vector((p[0]*DIM.x,p[1]*DIM.y,p[2]*DIM.z))
bpy.ops.wm.read_factory_settings(use_empty=True)
S=bpy.context.scene;S.unit_settings.system='METRIC';S.render.engine='CYCLES'
S.cycles.samples=24;S.cycles.use_denoising=True
prefs=bpy.context.preferences.addons['cycles'].preferences
prefs.compute_device_type='OPTIX';prefs.get_devices()
for dev in prefs.devices:dev.use=dev.type=='OPTIX'
S.cycles.device='GPU';S.cycles.bake_type='EMIT'
S.render.image_settings.file_format='PNG';S.view_settings.view_transform='AgX'
PAINTS=[('field grey',[.19,.22,.19]),('olive drab',[.20,.22,.10]),('desert tan',[.55,.42,.26]),('winter white',[.78,.79,.73]),('dark green-black',[.055,.075,.06]),('panzer grey',[.115,.135,.15])]
IDS=['metal_plate','rusty_metal_03']
def fetch(url,path):
 if not path.exists():
  req=urllib.request.Request(url,headers={'User-Agent':'Mozilla/5.0'})
  with urllib.request.urlopen(req,timeout=90) as r:path.write_bytes(r.read())
for ident in IDS:
 for mp in ['diff','nor_gl','arm']:
  p=TEX/f'{ident}_{mp}_1k.jpg'
  fetch(f'https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/{ident}/{ident}_{mp}_1k.jpg',p)
print('TEXTURES_READY',flush=True)
MATS={};BAKES=[]
def texture(nt,path,noncolor=False):
 n=nt.nodes.new('ShaderNodeTexImage');n.image=bpy.data.images.load(str(path),check_existing=True)
 if noncolor:n.image.colorspace_settings.name='Non-Color'
 return n

def make_mat(name,colour,metal,rough,ident='metal_plate',res=512):
 # Bake a shared 2 m tiling/trim swatch; geometry uses metre-scaled UVs.
 m=bpy.data.materials.new(name);m.use_nodes=True;nt=m.node_tree;nt.nodes.clear();lk=nt.links
 out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs['Surface'])
 uv=nt.nodes.new('ShaderNodeTexCoord');diff=texture(nt,TEX/f'{ident}_diff_1k.jpg');norm=texture(nt,TEX/f'{ident}_nor_gl_1k.jpg',True);arm=texture(nt,TEX/f'{ident}_arm_1k.jpg',True)
 for n in [diff,norm,arm]:lk.new(uv.outputs['UV'],n.inputs['Vector'])
 bw=nt.nodes.new('ShaderNodeRGBToBW');lk.new(diff.outputs['Color'],bw.inputs[0])
 ramp=nt.nodes.new('ShaderNodeValToRGB');ramp.color_ramp.elements[0].position=.08;ramp.color_ramp.elements[1].position=.8
 if name=='Paint':lo=(.46,.46,.45,1);hi=(.94,.95,.94,1)
 else:lo=(*[c*.40 for c in colour],1);hi=(*[min(1,c*1.6) for c in colour],1)
 ramp.color_ramp.elements[0].color=lo;ramp.color_ramp.elements[1].color=hi;lk.new(bw.outputs[0],ramp.inputs[0])
 mapping=nt.nodes.new('ShaderNodeVectorMath');mapping.operation='MULTIPLY';mapping.inputs[1].default_value=(48,2.3,1);lk.new(uv.outputs['UV'],mapping.inputs[0])
 noise=nt.nodes.new('ShaderNodeTexNoise');noise.inputs['Scale'].default_value=4;noise.inputs['Detail'].default_value=3;lk.new(mapping.outputs[0],noise.inputs['Vector'])
 grime=nt.nodes.new('ShaderNodeValToRGB');grime.color_ramp.elements[0].position=.25;grime.color_ramp.elements[0].color=(.45,.45,.44,1);grime.color_ramp.elements[1].position=.62;grime.color_ramp.elements[1].color=(1,1,1,1);lk.new(noise.outputs['Fac'],grime.inputs[0])
 mix=nt.nodes.new('ShaderNodeMixRGB');mix.blend_type='MULTIPLY';mix.inputs[0].default_value=.42;lk.new(ramp.outputs['Color'],mix.inputs[1]);lk.new(grime.outputs['Color'],mix.inputs[2]);lk.new(mix.outputs[0],p.inputs['Base Color'])
 if name=='Paint':
  uvsep=nt.nodes.new('ShaderNodeSeparateXYZ');lk.new(uv.outputs['UV'],uvsep.inputs[0])
  mudedge=nt.nodes.new('ShaderNodeMath');mudedge.operation='MULTIPLY_ADD';mudedge.inputs[1].default_value=.12;lk.new(noise.outputs['Fac'],mudedge.inputs[0]);lk.new(uvsep.outputs['Y'],mudedge.inputs[2])
  mudr=nt.nodes.new('ShaderNodeValToRGB');mudr.color_ramp.elements[0].position=.04;mudr.color_ramp.elements[0].color=(.20,.20,.19,1);mudr.color_ramp.elements[1].position=.32;mudr.color_ramp.elements[1].color=(1,1,1,1);lk.new(mudedge.outputs[0],mudr.inputs[0])
  dirty=nt.nodes.new('ShaderNodeMixRGB');dirty.blend_type='MULTIPLY';dirty.inputs[0].default_value=.80;lk.new(mix.outputs[0],dirty.inputs[1]);lk.new(mudr.outputs[0],dirty.inputs[2]);mix=dirty;lk.new(mix.outputs[0],p.inputs['Base Color'])
 nm=nt.nodes.new('ShaderNodeNormalMap');nm.inputs['Strength'].default_value=.055 if name=='Paint' else .30;lk.new(norm.outputs[0],nm.inputs['Color']);lk.new(nm.outputs[0],p.inputs['Normal'])
 sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(arm.outputs[0],sep.inputs[0])
 rr=nt.nodes.new('ShaderNodeMapRange');rr.inputs['To Min'].default_value=max(.42,rough-.12);rr.inputs['To Max'].default_value=min(.98,rough+.12);lk.new(sep.outputs[1],rr.inputs[0]);lk.new(rr.outputs[0],p.inputs['Roughness']);p.inputs['Metallic'].default_value=metal
 bpy.ops.mesh.primitive_plane_add(size=2);o=bpy.context.object;o.name='BakeFixture';o.data.materials.append(m)
 active=nt.nodes.new('ShaderNodeTexImage');nt.nodes.active=active
 emit=nt.nodes.new('ShaderNodeEmission')
 baked={}
 for mode,sz in [('base',res),('normal',res),('orm',512)]:
  im=bpy.data.images.new(name+'_'+mode,width=sz,height=sz,alpha=False)
  if mode!='base':im.colorspace_settings.name='Non-Color'
  active.image=im;nt.nodes.active=active
  if mode=='base':
   lk.new(mix.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT')
  elif mode=='normal':
   lk.new(p.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='NORMAL')
  else:
   comb=nt.nodes.new('ShaderNodeCombineColor');comb.inputs[0].default_value=1;comb.inputs[2].default_value=metal;lk.new(rr.outputs[0],comb.inputs[1]);lk.new(comb.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT')
  im.filepath_raw=str(TEX/f'{name}_{mode}.png');im.file_format='PNG';im.save();baked[mode]=im
 bpy.data.objects.remove(o,do_unlink=True)
 nt.nodes.clear();out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs[0])
 bn=nt.nodes.new('ShaderNodeTexImage');bn.image=baked['base'];nn=nt.nodes.new('ShaderNodeTexImage');nn.image=baked['normal'];on=nt.nodes.new('ShaderNodeTexImage');on.image=baked['orm']
 if name=='Paint':
  mul=nt.nodes.new('ShaderNodeMixRGB');mul.name='PaintFactor';mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*PAINTS[0][1],1);lk.new(bn.outputs[0],mul.inputs[1]);lk.new(mul.outputs[0],p.inputs['Base Color'])
 else:lk.new(bn.outputs[0],p.inputs['Base Color'])
 normal=nt.nodes.new('ShaderNodeNormalMap');lk.new(nn.outputs[0],normal.inputs[0 if False else 'Color']);lk.new(normal.outputs[0],p.inputs['Normal'])

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/bin/bash -lc 'gemini --help | head -45' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
usage: forge-gemini [-h] [--model MODEL] [--ask-permissions]

Interactive Gemini 3.8 Flash with Forge tools, skills and guards. Claude Code
arguments follow -- (for example -- --continue).

options:
  -h, --help         show this help message and exit
  --model MODEL      forge:build-gemini-* proxy alias
  --ask-permissions  keep Claude Code's approval prompts

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exec
/bin/bash -lc "sed -n '1,90p' /home/claude-agent/AGENTS.md; rg -n 'gemini|Read|critic' /home/claude-agent/AGENTS.md" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
<!-- GENERATED from CLAUDE.md by forge-hub/hub/gen_agents_md.py — do not edit by hand. -->
<!-- Re-run: python3 /home/claude-agent/forge-hub/hub/gen_agents_md.py -->

# Forge: AI-Powered App Factory
Single-tenant server (16GB ARM64 Hetzner), runs alongside Detecteev (forensics platform).

## Navigation
- **Forge app**: `/home/forge/app/` (Python, DBOS workflows)
- **Forge UI**: `/home/forge/ui/` (React + FastAPI, port 8765)
- **Detecteev**: `/home/claude-agent/detecteev/` (Next.js + FastAPI)
- **Project sandboxes**: `/home/forge/data/projects/{slug}/sandbox/`
- **Skills**: `/home/forge/app/skills/` (reasoning + stack-specific)
- **Deployed apps**: `/home/forge/deploys/{slug}/`
- **Specs & plans**: `/home/claude-agent/forge-build/`

## Architecture at a Glance
- **Pipeline**: intake → ideation → research → challenge → business → prd → feature-spec → stack-selection → blueprint → scaffolding → feature-build → dx-audit → product-review
- **Native Claude CLI calls use `--model sonnet`**. Provider adapters explicitly select their own API model; DeepSeek uses `deepseek-flash[1m]` through Claude Code.
- **Autonomy**: all stages auto by default, no human gates
- **Deploy**: Docker containers at `{slug}.forge.le-borgne.fr` via Traefik
- **Feedback loop**: report issue → AI drafts fix → user approves → auto-redeploy

> ⚠️ The pipeline above is the **legacy Personal Forge** (forge.le-borgne.fr). The live product is **Forge Corp** — multi-box, multi-tenant. Read the next section for current topology.

## Forge Corp topology & deploy architecture (CURRENT — read this)

**Boxes & roles** (each box has its OWN `/home/claude-agent`, memory store, and CLAUDE.md — they do NOT share):
- **local** `204.168.129.84` — orchestrator. Opus planning, this memory store, the `coord` bus. No app/infra runs here.
- **ax42** `5.9.32.176` (`ssh root@5.9.32.176`) — Corp **Engine** (the build+deploy pipeline `deploy_sandbox`) + Postgres **primaries**. Canonical Engine source: `/home/claude-agent/forge-monorepo/apps/forge-engine/` (module `forge_engine`).
- **box1** `136.243.170.223` (`ssh box1`) — Corp **app-runner**: deployed tenant apps (zero/friends/recommerce) run here + PG **standbys**.
- **gex44** `5.9.10.114` (`ssh root@5.9.10.114`) — **Factory** (auth/Google-OAuth proxy + tenant UI) + inference (Flux/3d/LiteLLM) + **Caddy edge**. Canonical Factory source: `/home/claude-agent/forge-monorepo/apps/forge-corp-factory/`.
- **prod** `46.224.168.31` (`ssh prod`) — **Tower** (operator control plane) + dashboard; also legacy Personal Forge + Detecteev.

**Canonical source = the live HOST trees, NOT git.** The Engine is image-baked (no bind-mount): deploy = `docker build` from the ax42 host source; Factory builds from the gex44 host source. The GitHub repo `T1misageek/forge-monorepo` is a periodic **snapshot/backup**, NOT the build source. NEVER treat git as source of truth. Before any Engine/Factory rebuild, reconcile **host ← live container** (a single-file rsync from the mirror silently drops live state). httpx is in the Engine container, not host Python.

**Engine runs blue/green since 2026-09-02 13:11 UTC.** nginx `forge-engine-front` owns host `:8000` + docker alias `forge-engine`; Engine instances are `forge-engine-<ts>` (no host port). There is NO container named `forge-engine` any more: use `docker exec $(engine-live) …`, `docker logs $(engine-live)`. Deploy = `engine-deploy` (= `deploy.ax42.sh`: build → start new instance → `engine-switch` nginx reload → drain old, **no idle gate, nothing killed**); `engine-rollback` flips back (refuses a stopped previous); `engine-restart` no-arg = `engine-deploy --no-build`. **Builds AND refine turns survive an instance death** (P1 09-02 + P2 09-03): a 15 s sweep adopts orphaned runs (`pipeline/adopt.py`) and refine turns (`refine/adopt.py`: `metadata.active_turn`, `claude --resume` of the shared transcript store `~/.claude-engine`), proven by hard-kill on pausetest tenants. Never kill an instance without reading `/admin/inflight` first. **P3 (09-03)**: brief submits are idempotent (`X-Forge-Idempotency-Key` = Factory brief id → `runs.idempotency_key`, replay = 200 + `x-forge-idempotent-replay: 1`); the Factory retries only when Engine `/health` advertises `capabilities.idempotent_submit`; the reconciler re-polls `failed` runs < 6 h. `/admin/instance`, `/admin/inflight`, `POST /admin/drain` (consumer Bearer key). Detail: memory `project_engine_zero_downtime_deploys.md`.

**Deploy pipeline `deploy_sandbox`** (`forge_engine/deploy/__init__.py`, synchronous): Step 0 Dockerfile/.env → 0b telemetry route → 0c connectors → 0d cache → 1 build → 1b transport to box1 → 2 run (reaps prev container immediately, so **no `-prev` rollback exists** by later steps) → 3 inspect IP → 4 DNS → 5 traefik → **6 authed-smoke gate**.

**Step 6 — deploy-time authed-smoke gate (`forge_engine/deploy/smoke.py`)**: after cutover, mints a REAL synthetic session and GETs the app's post-login routes (pages referencing `requireUser`/`getCurrentUser`). Catches the "builds + homepage-200 but 500s after Google login" class (e.g. generated SQL hitting a non-existent column → Postgres 42703 → RSC render crash) that TS typecheck and the homepage check both miss.
- ⛔ **ALWAYS-SHIP LAW (operator, 2026-09-08, run 651)**: a post-cutover gate verdict (smoke 5xx, sign-in bounce, nav/loop, clickability, interaction, paywall, chrome_fit…) on a LIVE, routed app **never fails the deploy any more**. `forge_engine/deploy/ship_policy.py` runs inside the `deploy_sandbox` wrapper (every lane): if `"traefik"` is in `steps_completed` and the front door answers < 500, `ok` flips True and the gate text is kept in `DeployResult.shipped_with_findings`, the corp-deploy `gate_report`, and `runs.meta.shipped_with_findings` (ERROR log `SHIPPED WITH FINDINGS`). Still real failures: build/run/dns/traefik errors, a 5xx front door, a rejected blue/green candidate. Kill switch `FORGE_ALWAYS_SHIP=0`. Memory `feedback_always_ship_live_builds.md`.
- Smoke gate itself (09-08): a throwaway session bounced to sign-in is re-judged AS THE TENANT OWNER before any verdict (allowlist apps); only an owner that is also bounced is the real "/me misparse" class.
- Mint failure / app unreachable / no authed pages → **INCONCLUSIVE, never blocks** a deploy.
- **Mint path**: Engine can't reach the Factory DB, so it POSTs `https://forge.{tenant}.ohmyunicorn.com/api/auth/oauth/google/_smoke` (in `forge_corp/api/routes/oauth_google.py`) guarded by header `x-forge-smoke-secret` (wrong/unset → 404). Shared secret in `/home/claude-agent/.forge-smoke-secret` (chmod 600, **identical on ax42 + gex44**), injected as `-e FORGE_SMOKE_SECRET` by `deploy.ax42.sh` (Engine) and `deploy.sh` (Factory). Absent secret ⇒ /_smoke stays 404 ⇒ smoke INCONCLUSIVE (never blocks).
- **Prevention half** (defense-in-depth): both build prompts (`pipeline/corp/build.py` + `pipeline/fast/fast_build.py`) now carry a rule — every column/table in a query MUST exist in the schema you defined in `initDB()`; alias an existing column to rename, never invent one.
- Detail in memory: `reference_authed_smoke_gate.md`, `reference_authed_page_sql_column_gap.md`.

## Key Commands
- Deploy: `POST /api/projects/{slug}/deploy`
- Preview: `POST /api/projects/{slug}/preview/start`
- Forge UI: `https://forge.le-borgne.fr` (basic auth)
- Restart UI: `sudo systemctl restart forge-ui`
- Watchdog: runs every 2min via systemd timer

## Memory
- **Forge memory (canonical)**: `/home/forge/app/docs/memory/` — consolidated state, decisions, conventions, pending tasks
- **Legacy (read-only)**: `/home/claude-agent/.claude/projects/-home/memory/` — kept for reference, no longer updated

## Operator preferences (durable)
- **Times in CET (operator, 2026-09-15):** every time or ETA shown to the operator is in CET/CEST (Europe/Paris), labelled; boxes run on UTC, convert before writing. Applies to worker briefs and published docs too.
- **Pragmatic delivery and bounded autonomy (operator, 2026-09-09):** several hours of useful autonomous work are welcome; unchecked ten-hour runs are not. Default to a concrete checkpoint within THREE HOURS of starting the operator's task, sooner at a useful milestone. Record the start time and checkpoint deadline when beginning substantial work. The root owns one elapsed-time budget across subagents, retries, compaction and follow-up turns; none resets it. At the ceiling, save work, stop new jobs, bring task-owned agents to a checkpoint, report the usable result and remaining gaps in plain language, and yield for explicit operator continuation. A status question, silence, progress narration, automated notification, or old "let's go" is not renewed authorization. The operator may explicitly set a different window.
- **Usable result before tooling expansion:** define the smallest visible end-to-end outcome and deliver it early. Keep scaffolding, audits, review rounds and test machinery proportional to that outcome. Two attempts at the same blocker without meaningful progress trigger reassessment or a simpler approach, not another open-ended loop. Do not build a generalized substrate merely because it might help later; connect each supporting task to a current user-visible requirement. Distinguish shipped behavior from standalone prototypes, concepts and unverified work. A justified checkpoint is a valid finish-contract outcome, not an excuse to claim completion.
- **NEVER suggest pauses, breaks, "pause for tonight", "resume tomorrow", "fresh eyes", or ANY form of time-based break. EVER.** This is the single most annoying behaviour for the operator. *Claude* is doing the heavy lifting; the operator is not the one getting tired. Time of day is irrelevant — push through, period. Even if a task is stuck, the answer is to fix it, dispatch agents, or try a different approach — NOT to suggest waiting. If a clean reinstall is the answer, just do it. The operator decides when to stop, not Claude.
- **Quality over cost** within the agreed scope and checkpoint window. Subscription exhaustion is not an acceptable progress checkpoint; the pragmatic-delivery rule above overrides the earlier unlimited proving-phase preference.
- **Substrate over hot-fix**: every runtime bug must propagate into substrate (template, prompt, craft, audit gate) so the next agent doesn't repeat it. Hot-fix-only is a half fix.
- **Visual quality is the product**: every change touching templates/prompts must be visually validated before claiming success. "It builds and deploys" ≠ "it looks right".
- **Delegation:** work locally by default. Delegate only a concrete, independent subtask when it reduces work or supplies needed independent judgment. Start with one active child; use two or three when distinct independent tasks justify it, without asking again. Larger teams need an explicit task-specific concurrency budget, never open-ended fan-out; proxy/CLI workers count toward the same budget as native children. No recursive delegation by default. All workers share the root checkpoint deadline. Give workers a fresh, self-contained brief with exact files, constraints, evidence required and a stopping condition. Full-history forks are exceptional, never a default.
- **Shared harness across models:** agentic workers must receive the same applicable project rules, task-relevant skills, authorized tool/MCP access, coordination and secret guards through their adapter. Load skills selectively, not all at once. Preserve isolation and task-specific permissions; equal harness support does not grant broader authority. Missing wiring is an adapter gap to report or fix, not a reason to declare a model incapable. Verify the chosen lane rather than assuming every helper inherits the full setup.
- **Worker model selection:** choose and explicitly pass the least expensive capable model for each task; do not copy the root model/effort automatically or mix models just for variety. Gemini 3.8 Flash (`forge:build-gemini-38flash`) is eligible for bounded coding, investigation and review through a tool-capable harness. Local builders use `forge-agent run --harness gemini --model forge:build-gemini-38flash --repo <repo> --purpose <task> --task <brief>` with a bounded `--timeout`; this runs Claude Code with copied shared skills/rules/hooks, Forge MCP and isolated proxy auth. Proven locally with actual Gemini responses, MCP skill/coord calls, file edits, tests and a blocked secret-guard probe. `--harness gemini-proxy` remains the single-shot no-tools helper for tasks that need no tools. The local Gemini builder currently rejects optional `--jail`; never imply that it ran in a container sandbox. Use `gpt-5.6-luna` for narrow mechanical work, `gpt-5.6-terra` for exploration and bounded implementation, `gpt-6.1-sol` (Sol) for demanding implementation/debugging/review, and `gpt-6-astra` for unusually difficult architecture or reasoning. **Sol = `gpt-6.1-sol` (operator, 2026-09-30):** every Sol request runs GPT-6.1 Sol (Codex CLI >= 0.159.2; 0.156 gets a 400). `sol`/`solx` call it, and the Engine swaps `gpt-6-sol` and `gpt-5.6-sol` for it at launch (`cli/sonnet_retire.py` LATEST_VERSION, also inside `run_tracked_codex_cli`). `gpt-6-luna` (Codex CLI >= 0.156.0) is the GPT-6 option for the Luna tier; not benchmarked yet, so `gpt-5.6-luna` stays the Luna default until a measured run shows it is worth its cost. Claude CLI workers use `--model sonnet`, which is **Sonnet 5.5 only** on this box (alias pinned in `~/.claude/settings.json` since 2026-09-28; never Sonnet 5; the Engine still remaps Sonnet to Opus 5.5). **Haiku 5.5 (2026-10-08):** `--model haiku` = `claude-haiku-5-5` everywhere (alias pinned in `~/.claude/settings.json`; the Engine seam upgrades `haiku`/`claude-haiku-4-5` at launch): $0.10 in / $0.50 out per MTok, 1M context, default effort medium. Use it for classification, extraction, routing, yes/no gates, judges and cheap subagents at effort low or medium; `haikux "prompt"` one-shot, `review --by haiku` for the cheapest second look (same family, not independent), panel seat `haiku-local`. Always pass `--effort`: low for mechanical edits, medium by default, high only for creative or hard work (and for benchmarks, the same effort as the run it is compared with). Native Codex defaults are Terra/medium; explicitly select low effort for straightforward tasks and high only where the reasoning warrants it. Prefer a different family for independent judgment when useful. Escalate after evidence of a capability limit instead of repeated cheap retries; name unavailable models and use a supported alternative. Codex mixed-model spawns use `fork_turns="none"` with a self-contained brief; full-history forks inherit the parent's model and effort.
- **Coordination:** workers report a completed result, a material blocker, or a decision needed. Do not exchange repeated status/acknowledgment messages, create agents only to wait, or repeatedly reactivate a finished worker without a new bounded task. Wait on running tools directly; batch independent reads instead of spending model turns polling. The root keeps useful local work and integrates the result.
- **Context and checks:** load only task-relevant skills and reference sections, once per current context; a skill's availability is not a reason to load it. Use scoped searches and bounded output; keep full logs in artifacts. Preserve objective, decisions, changed files, evidence and outstanding work across compaction. Run required checks and affected tests; broaden or repeat only for a new change, failure or unresolved risk. Stop when the requested outcome is evidenced.

## Talking to other models in the CLI (2026-09-17)

Three model CLIs, same shape, all with full tool access and no approval prompts
(safety = the PreToolUse secret + coordination guards, not a sandbox):

| command | model | one-shot | extra flags |
| --- | --- | --- | --- |
| `astra` | Codex GPT-6 Astra | `astrax` | Codex flags |
| `sol` | Codex GPT-6.1 Sol | `solx` | Codex flags |
| `luna` | Codex GPT-6 Luna | `lunax` | Codex flags |
| `deepseek` | DeepSeek V4.1 Flash | `deepseekx` | `--effort low|high|max` |
| `gemini` | Gemini 3.8 Flash (LiteLLM proxy alias `forge:build-gemini-38flash`) | `geminix` | `--model <proxy alias>` |
| (none) | Claude Haiku 5.5 (`claude-haiku-5-5`, via `claude-lean`) | `haikux` | Claude Code flags (`--effort low`, `--tools ""`) |

All four are executables in `~/bin`, not shell functions: `~/.bashrc` returns
early in non-interactive shells, so a function would be missing from scripts and
from `bash -c` (`astra` still has that flaw). `--ask-permissions` restores the
approval prompts. `deepseek` and `gemini` are Claude Code driving another
23:> ⚠️ The pipeline above is the **legacy Personal Forge** (forge.le-borgne.fr). The live product is **Forge Corp** — multi-box, multi-tenant. Read the next section for current topology.
69:- **Worker model selection:** choose and explicitly pass the least expensive capable model for each task; do not copy the root model/effort automatically or mix models just for variety. Gemini 3.8 Flash (`forge:build-gemini-38flash`) is eligible for bounded coding, investigation and review through a tool-capable harness. Local builders use `forge-agent run --harness gemini --model forge:build-gemini-38flash --repo <repo> --purpose <task> --task <brief>` with a bounded `--timeout`; this runs Claude Code with copied shared skills/rules/hooks, Forge MCP and isolated proxy auth. Proven locally with actual Gemini responses, MCP skill/coord calls, file edits, tests and a blocked secret-guard probe. `--harness gemini-proxy` remains the single-shot no-tools helper for tasks that need no tools. The local Gemini builder currently rejects optional `--jail`; never imply that it ran in a container sandbox. Use `gpt-5.6-luna` for narrow mechanical work, `gpt-5.6-terra` for exploration and bounded implementation, `gpt-6.1-sol` (Sol) for demanding implementation/debugging/review, and `gpt-6-astra` for unusually difficult architecture or reasoning. **Sol = `gpt-6.1-sol` (operator, 2026-09-30):** every Sol request runs GPT-6.1 Sol (Codex CLI >= 0.159.2; 0.156 gets a 400). `sol`/`solx` call it, and the Engine swaps `gpt-6-sol` and `gpt-5.6-sol` for it at launch (`cli/sonnet_retire.py` LATEST_VERSION, also inside `run_tracked_codex_cli`). `gpt-6-luna` (Codex CLI >= 0.156.0) is the GPT-6 option for the Luna tier; not benchmarked yet, so `gpt-5.6-luna` stays the Luna default until a measured run shows it is worth its cost. Claude CLI workers use `--model sonnet`, which is **Sonnet 5.5 only** on this box (alias pinned in `~/.claude/settings.json` since 2026-09-28; never Sonnet 5; the Engine still remaps Sonnet to Opus 5.5). **Haiku 5.5 (2026-10-08):** `--model haiku` = `claude-haiku-5-5` everywhere (alias pinned in `~/.claude/settings.json`; the Engine seam upgrades `haiku`/`claude-haiku-4-5` at launch): $0.10 in / $0.50 out per MTok, 1M context, default effort medium. Use it for classification, extraction, routing, yes/no gates, judges and cheap subagents at effort low or medium; `haikux "prompt"` one-shot, `review --by haiku` for the cheapest second look (same family, not independent), panel seat `haiku-local`. Always pass `--effort`: low for mechanical edits, medium by default, high only for creative or hard work (and for benchmarks, the same effort as the run it is compared with). Native Codex defaults are Terra/medium; explicitly select low effort for straightforward tasks and high only where the reasoning warrants it. Prefer a different family for independent judgment when useful. Escalate after evidence of a capability limit instead of repeated cheap retries; name unavailable models and use a supported alternative. Codex mixed-model spawns use `fork_turns="none"` with a self-contained brief; full-history forks inherit the parent's model and effort.
84:| `gemini` | Gemini 3.8 Flash (LiteLLM proxy alias `forge:build-gemini-38flash`) | `geminix` | `--model <proxy alias>` |
90:approval prompts. `deepseek` and `gemini` are Claude Code driving another
93:Each has a persistent private profile (`~/.local/share/forge-{deepseek,gemini}/profile`)
117:`~/.claude/hooks/wait_guard.py` (settings.json PreToolUse `Bash|TaskOutput|Read`, copied into the
158:`review [--by gemini|deepseek] [--repo <path>] [--task "what was asked"]`;
159:default reviewer gemini, cross-check with `--by deepseek`. Reviews uncommitted
223:A PreToolUse hook (`~/.claude/hooks/secret_guard.py`, matcher Bash|Read|Grep, tests in `hooks/tests/test_secret_guard.py`) DENIES reading credential files (`.credentials`, `~/.forge-secrets/`, `.forge-smoke-secret`, `auth.json`, `.env*`, `*.key`, `*.pem`, ssh private keys, `.netrc`, `.pgpass`, `*secrets*.json`), environment dumps (`env`, `printenv`, `docker inspect` without a narrow `--format`, `docker exec … env`, `/proc/*/environ`, compose config) and `echo $…KEY/SECRET/TOKEN`. Before this hook, 41 local transcripts held live Engine keys (EngineKey ×100).
239:- Reads need NO claim — you only claim what you will mutate.

hook: PreToolUse
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/bin/bash -lc "gemini --model forge:build-gemini-38flash -- -p 'Act only as an independent visual critic. Read actual images with Read: /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/sheet.jpg, /tmp/a7v-final-v1.png, /tmp/a7v-final-v2.png, /tmp/a7v-side-v2.png, /tmp/a7v-states-v2.png. Do not edit anything. User wants a realistic A7V game asset matching sheet; budget healthy 80-140k tris 12MB, currently about 98k triangles 9MB. Prioritise at most five visible defects versus reference, exact image evidence, practical correction and measurable acceptance. Separate observed issue from suspected cause. Note improvements/regressions. Return PASS/REVISE/BLOCKED, no invented visual inspection if tools cannot read images. Current local forthcoming fixes already include conforming roof grilles to slope, beveled panel thickness, tiny paint scuffs, labeled state grid, true orthographic side camera; assess images as they are.' --allowedTools Read --output-format text > /tmp/a7v-critic.txt 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py'
s=open(p).read().replace(\"camera((10,0,3.1),(0,0,1.65),9.5)\",\"camera((10,0,1.65),(0,0,1.65),10.1)\")
s=s.replace(\"H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015)\",\"slope=math.atan(.065 if yy<0 else -.065); rr=Matrix.Rotation(slope,3,'X')\\n H.box((0,yy,roof(yy)+.021),(1.84,1.30,.045),'Interior',.015,rr)\")
s=s.replace(\"(.032,1.18,.014),'Weapons',.003)\",\"(.032,1.18,.014),'Weapons',.003,rr)\")
s=s.replace(\"roof(yy)+.08),(.045,1.36,.035),'Paint',.007)\",\"roof(yy)+.060),(.045,1.36,.035),'Paint',.007,rr)\")
s=s.replace(\"roof(y)+.065),(1.86,.045,.035)\",\"roof(y)+.060),(1.86,.045,.035)\")
s=s.replace(\"roof(yy)+.065),(.56,.058,.017),'Paint',.005,Matrix.Rotation(-.08,3,'X'))\",\"roof(yy-.59+j*.108)+.065),(.56,.058,.017),'Paint',.005,rr)\")
s=s.replace(\"roof(y)+.125),(0,0,1),.022)\",\"roof(y)+.080),(0,0,1),.022)\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'tail -15 /tmp/a7v-critic.txt' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
[claude-code:unrecognized_model] {"model":"forge:build-gemini-38flash","query_source":"sdk"}

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/bin/bash -lc "rg -n 'sx\\(|def roof|SCAR|scar|patch|chip|Wheel|Track_L|uv|lower' build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
45: uv=nt.nodes.new('ShaderNodeTexCoord');diff=texture(nt,TEX/f'{ident}_diff_1k.jpg');norm=texture(nt,TEX/f'{ident}_nor_gl_1k.jpg',True);arm=texture(nt,TEX/f'{ident}_arm_1k.jpg',True)
46: for n in [diff,norm,arm]:lk.new(uv.outputs['UV'],n.inputs['Vector'])
52: mapping=nt.nodes.new('ShaderNodeVectorMath');mapping.operation='MULTIPLY';mapping.inputs[1].default_value=(48,2.3,1);lk.new(uv.outputs['UV'],mapping.inputs[0])
57:  uvsep=nt.nodes.new('ShaderNodeSeparateXYZ');lk.new(uv.outputs['UV'],uvsep.inputs[0])
58:  mudedge=nt.nodes.new('ShaderNodeMath');mudedge.operation='MULTIPLY_ADD';mudedge.inputs[1].default_value=.12;lk.new(noise.outputs['Fac'],mudedge.inputs[0]);lk.new(uvsep.outputs['Y'],mudedge.inputs[2])
107: def __init__(self):self.v=[];self.f=[];self.mi=[];self.smooth=[];self.uv=[]
108: def add(self,verts,faces,mat='Paint',smooth=False,uv=None):
109:  off=len(self.v);self.v.extend([tuple(v) for v in verts]);self.f.extend([[off+i for i in f] for f in faces]);self.mi.extend([MI[mat]]*len(faces));self.smooth.extend([smooth]*len(faces));self.uv.extend(uv if uv else [None]*len(faces))
156:  uv=me.uv_layers.new(name='UVMap')
157:  for poly,mi,sm,custom in zip(me.polygons,self.mi,self.smooth,self.uv):
166:    uv.data[li].uv=coord
185:# Armour: lower edge flares outward, upper shoulders taper inward.
186:def sx(z):return 1.48-(z-.65)*.10
189:def roof(y):return 2.77-.065*max(0,abs(y)-.55)
191: H.plate([(s*(sx(1.10)-.06),-3.28,1.10),(s*(sx(1.10)-.06),3.28,1.10),(s*(sx(2.60)-.06),3.18,2.60),(s*(sx(2.60)-.06),-3.18,2.60)],.055)
194:  # fitted upper panels and six detachable lower plates per side
196:  H.plate([(s*(sx(1.10)+.009),a+.004,1.10),(s*(sx(1.10)+.009),b-.004,1.10),(s*(sx(zb)+.009),b-.004,zb),(s*(sx(za)+.009),a+.004,za)],.035)
197:  B=Build();B.plate([(s*(sx(.64)+.018),a+.008,.64),(s*(sx(.64)+.018),b-.008,.64),(s*(sx(1.11)+.022),b-.008,1.11),(s*(sx(1.11)+.022),a+.008,1.11)],.04)
199:   for zz in [.74,1.01]:B.rivet((s*(sx(zz)+.047),yy,zz),(s,0,.1),.022)
203:    z=1.14+k*(min(za,zb)-1.23)/10;H.rivet((s*(sx(z)+.027),yy,z),(s,0,.10),.019)
205:   yy=a+.13+(b-a-.26)*k/6;z=roof(yy)-.075;H.rivet((s*(sx(z)+.023),yy,z),(s,0,.1),.019)
207:  for yy in [a+.16,b-.16]:H.box((s*(sx(.99)+.02),yy,.99),(.075,.09,.105),'Weapons',.01)
211:  yy=random.uniform(-3.0,3.0);zz=random.uniform(1.17,2.50);length=random.uniform(.025,.095);xx=sg*(sx(zz)+.0285)
212:  H.add([(xx,yy,zz),(xx,yy+.006,zz+.006),(sg*(sx(zz+length)+.0285),yy+.013,zz+length)],[[0,1,2]],'Weapons')
219: for sg in [-1,1]:H.plate([(sg*sx(.64),end*3.28,.64),(sg*1.48,end*3.38,.68),(sg*1.275,end*3.12,2.60),(sg*sx(2.60),end*3.27,2.60)],.035)
229: # lower folded prow triangles give the distinctive central upsweep
236: H.plate([(-sx(roof(a)),a,roof(a)),(sx(roof(a)),a,roof(a)),(sx(roof(b)),b,roof(b)),(-sx(roof(b)),b,roof(b))],.05)
240:# Engine deck grilles: separate louvres above solid dark fins and lined engine well.
254:# cab lower dimensions 1.66 x 1.50, top 1.46 x 1.28, top z3.28.
286: yy=-2.17;z=1.80;x=s*(sx(z)+.048)
319:  z=2.14;xx=s*(sx(z)+.065);H.box((xx,yy,z),(.065,.35,.33),'Interior',.012)
342:  wheels.append(B.object(f'Wheel_{side}{idx+1}',(x,y,z)))
356:  B=Build();B.cyl((x-.19,y,.80),(x+.19,y,.80),.13,'TrackSteel',20);B.cyl((x+s*.19,y,.80),(x+s*.23,y,.80),.065,'Weapons',16);wheels.append(B.object(f'Wheel_{side}{14+i}',(x,y,.80)))
383:   B.uv[k]=coords
424: # Cut a ragged wedge away at the lower corner of armour plates, then peel the edge.
437:# Scar patches: disks sit 3mm above actual armour, metal petalled crater rims and black pits.
438:scar_names=[]
439:def scar_group(name,positions,normals):
457: ob=B.object(name);prune(ob);parent_keep(ob,td if 'Turret' in name else hd);damage.append(ob);scar_names.append(name)
460: for yy,zz in [(-1.65,1.70),(-.50,2.30),(1.30,1.85),(2.7,2.2)]:poses.append((s*(sx(zz)+.029),yy,zz))
461: scar_group('Scar_Hull_'+side,poses,[(s,0,.1)]*4)
465: scar_group('Scar_Hull_'+label,positions,[(0,end,.14)]*4)
466:for s,label in [(1,'L'),(-1,'R')]:scar_group('Scar_Turret_'+label,[(s*.78,-.4,3.04),(s*.78,.34,3.02),(s*.78,.1,3.12)],[(s,0,.2)]*3)
467:for end,label in [(-1,'Front'),(1,'Rear')]:scar_group('Scar_Turret_'+label,[(x,end*.75,2.87) for x in [-.5,0,.5]],[(0,end,.1)]*3)
500:  if o.name=='Track_L':src=next(q for q in damage if q.name=='Track_L_Broken')
506: if o.name.startswith('Wheel_'):q.location.z-=.05
555:meta={'contract':'tank-damage/v1','type':'A7V turretless','axes':{'forward':'+Z','up':'+Y','left':'+X'},'units':'metres','armour_dimensions_m':{'length':7.34,'width':3.07,'height':3.30},'files':{'a7v-tank.glb':manifest(healthy),'a7v-tank-damage.glb':manifest(damage)},'paints':[{'name':name,'linear_rgb':col} for name,col in PAINTS],'damage':{'parts':[{'part':p.name,'twin':next((q.name for o,q in twins if o==p),None)} for p in parts],'scars':scar_names,'broken':{'Track_L':'Track_L_Broken','Track_R':'Track_R_Broken','Gun':'Gun_Broken'},'wreck':['Wreck_Hull'],'turretless':True},'rig':{'Gun':{'yaw_axis':'Y','yaw_degrees':[-25,25],'elevation_axis':'X'},'Barrel':{'recoil_axis':'Z'},'wheels':{'axis':'X'},'track_uv':'V runs once around the loop','machine_guns':8,'turret':None},'bakes':BAKES}
591:moving=[o for o in A if o.name.startswith(('Wheel_','Hatch_','MG_')) or o.name in ['Gun','Barrel']]
632:  for n in scar_names:
641:  named('Track_L',A).hide_render=True;named('Track_L_Broken',D).hide_render=False

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/bin/bash -lc "sed -n '145,174p' build_a7v-tank.py; sed -n '435,470p' build_a7v-tank.py; tail -35 /tmp/a7v-critic.txt" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
 def plate(self,points,thick=.035,mat='Paint'):
  ps=[Vector(p) for p in points];normal=(ps[1]-ps[0]).cross(ps[2]-ps[0]).normalized();n=len(ps)
  vv=[p+normal*thick*.5 for p in ps]+[p-normal*thick*.5 for p in ps];ff=[list(range(n)),list(reversed(range(n,2*n)))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)]
  bm=bmesh.new();verts=[bm.verts.new(v) for v in vv]
  for face in ff:bm.faces.new([verts[i] for i in face])
  bmesh.ops.recalc_face_normals(bm,faces=list(bm.faces));bmesh.ops.bevel(bm,geom=list(bm.edges),offset=min(.004,thick*.2),segments=2,affect='EDGES',clamp_overlap=True)
  bm.verts.ensure_lookup_table();bm.verts.index_update();self.add([v.co.copy() for v in bm.verts],[[v.index for v in f.verts] for f in bm.faces],mat);bm.free()
 def object(self,name,pivot=(0,0,0)):
  me=bpy.data.meshes.new(name);me.from_pydata([scaled(Vector(p)-Vector(pivot)) for p in self.v],[],self.f);me.update()
  ob=bpy.data.objects.new(name,me);S.collection.objects.link(ob);ob.location=scaled(pivot)
  for m in MATLIST:me.materials.append(m)
  uv=me.uv_layers.new(name='UVMap')
  for poly,mi,sm,custom in zip(me.polygons,self.mi,self.smooth,self.uv):
   poly.material_index=mi;poly.use_smooth=sm
   normal=poly.normal;axis=max(range(3),key=lambda i:abs(normal[i]))
   for j,li in enumerate(poly.loop_indices):
    v=Vector(self.v[me.loops[li].vertex_index])
    if custom:coord=custom[j]
    elif axis==0:coord=(v.y*.48,(v.z-.58)/2.25 if v.z<2.80 else .30+(v.z-2.77)*.9)
    elif axis==1:coord=(v.x*.48,(v.z-.58)/2.25 if v.z<2.80 else .30+(v.z-2.77)*.9)
    else:coord=(v.x*.48,v.y*.48)
    uv.data[li].uv=coord
  return ob

def empty(name,p,parent=None):
 o=bpy.data.objects.new(name,None);S.collection.objects.link(o);o.location=scaled(p)
 if parent:parent_keep(o,parent)
 return o
def parent_keep(o,p):
 bpy.context.view_layer.update();mw=o.matrix_world.copy();o.parent=p;o.matrix_world=mw
 # Damage material darkened steel at torn edges is represented by strips below.
 par=td if 'CabFlap' in o.name else hd;parent_keep(q,par);twins.append((o,q));damage.append(q)
# Scar patches: disks sit 3mm above actual armour, metal petalled crater rims and black pits.
scar_names=[]
def scar_group(name,positions,normals):
 B=Build()
 for idx,(p,n) in enumerate(zip(positions,normals)):
  p=Vector(p);n=Vector(n).normalized();q=n.to_track_quat('Z','Y');r=.043 if idx else .083
  # asymmetric soot halo as a thin irregular disk
  count=16;vv=[p+n*.0025]
  for i in range(count):
   a=2*pi*i/count;rad=r*(1.5+.30*sin(i*4.2));vv.append(p+q@Vector((rad*cos(a),rad*sin(a),.003)))
  B.add(vv,[[0,i+1,(i+1)%count+1] for i in range(count)],'Burnt')
  # open rim with black interior inset; raised petals catch glancing light
  vv=[]
  for ring in [0,1,2]:
   for i in range(count):
    a=2*pi*i/count;rr=r*[1,.57,.44][ring];zz=[.003,.007+(.008 if idx==0 else .004)*(1+sin(i*3)),.004][ring];vv.append(p+q@Vector((rr*cos(a),rr*sin(a),zz)))
  B.add(vv,[[ring*count+i,ring*count+(i+1)%count,(ring+1)*count+(i+1)%count,(ring+1)*count+i] for ring in [0,1] for i in range(count)],'Scars')
  B.cyl(p+n*.003,p+n*.004,r*.45,'Interior',16)
  if idx>0:
   B.tube([p+q@Vector((r*.7,0,.004)),p+q@Vector((r*1.9,r*.3,.004)),p+q@Vector((r*2.7,r*.6,.004))],.008,'Scars',6)
 ob=B.object(name);prune(ob);parent_keep(ob,td if 'Turret' in name else hd);damage.append(ob);scar_names.append(name)
for s,side in [(1,'L'),(-1,'R')]:
 poses=[]
 for yy,zz in [(-1.65,1.70),(-.50,2.30),(1.30,1.85),(2.7,2.2)]:poses.append((s*(sx(zz)+.029),yy,zz))
 scar_group('Scar_Hull_'+side,poses,[(s,0,.1)]*4)
for end,label in [(-1,'Front'),(1,'Rear')]:
 positions=[]
 for xx,zz in [(-.54,1.45),(.62,1.82),(.23,2.44),(-1.0,1.23)]:positions.append((xx,end*(3.38-(zz-.68)*.26/1.92+.018),zz))
 scar_group('Scar_Hull_'+label,positions,[(0,end,.14)]*4)
for s,label in [(1,'L'),(-1,'R')]:scar_group('Scar_Turret_'+label,[(s*.78,-.4,3.04),(s*.78,.34,3.02),(s*.78,.1,3.12)],[(s,0,.2)]*3)
for end,label in [(-1,'Front'),(1,'Rear')]:scar_group('Scar_Turret_'+label,[(x,end*.75,2.87) for x in [-.5,0,.5]],[(0,end,.1)]*3)
# Broken gun combines original mount with a bent, split barrel at the same pivot.
q=clone(gun,'Gun_Broken');pieces=[q]
bb=clone(barrel,'broken_barrel_temp')
[claude-code:unrecognized_model] {"model":"forge:build-gemini-38flash","query_source":"sdk"}
### Verdict: REVISE

The asset has good basic topology and correct proportions, but several visible deviations from the reference sheet prevent it from being a faithful game asset.

---

### Improvements and Regressions (v1 vs v2)
- **Improvement**: Bogie and track run detail in v2 shows proper dual-wheel trucks, return guides, and suspension springs matching the reference running gear layout.
- **Improvement**: Commander's cab roof panels gained realistic seam lines.
- **Regression / Persistent Issue**: Roof louvers in v2 still levitate horizontally as planar blocks rather than sinking or conforming to the sloping hull roof.

---

### Priority Defects (Max 5)

| # | Visible Defect (Observed) | Suspected Cause | Image Evidence | Practical Correction | Acceptance Target |
|---|---|---|---|---|---|
| **1** | **Floating horizontal roof grilles with open under-gaps** | Louver assembly placed flat on Z axis without matching the longitudinal roof slope. | `a7v-side-v2.png` (upper left and right roof) shows tall vertical wedge gaps beneath grille frames. `sheet.jpg` (top & side views) shows grilles mounted flush with the slope. | Rotate grille parent frames to match roof slope pitch (-X deg front, +X deg rear) and seat flush into roof cutouts. | Zero gap visible between bottom edge of grille border and hull roof plate in orthographic side view. |
| **2** | **Exhaust pipe routing shape and height mismatch** | Simple straight cylinder with single bend, positioned too low relative to door and gun mounts. | `a7v-side-v2.png` shows pipe dipping down to bottom skirt; `sheet.jpg` (side view) shows pipe entering hull behind door via an upward S-curve, running horizontally along mid-body, and bending down at rear. | Re-route pipe spline: curve down from rear side plate, run horizontal above bottom access hatches, and bend into mid-hull behind side door. | Exhaust pipe centerline stays above lower access port row along its entire horizontal section. |
| **3** | **Missing frontal lower prow / glacis chevron plate** | Front hull bottom ends in a single flat overhang over tracks. | `sheet.jpg` (front view & 3/4 view) shows distinct V-shaped lower bow plate with forward chevron point; `a7v-final-v2.png` has flat dark underside lacking bottom angled hull faceting. | Extrude and seam the lower front armor downward into a forward-pointing prow keel matching the front orthographic angle on sheet. | Front orthographic camera shows central inverted triangle/prow profile below the main gun ball mount. |
| **4** | **Hull texture lacks WWI field weathering, edge grime, and panel streaks** | Clean, uniform brushed metal procedural material without dirt masks or AO edge bake. | `a7v-final-v2.png` vs `sheet.jpg`: reference shows heavy mud/dirt gradient on lower skirts, water drip stains under rivets, and scratched field-grey matte paint (`#5E6966`). Render looks sterile primer grey. | Bake curvature/cavity and AO maps; add brown earth dirt gradient on bottom 20% of skirt panels and vertical streak grunge masks below rivets/doors. | Lower 15% of hull skirt displays visible brownish-grey earth gradient blending into clean field grey. |
| **5** | **Commander cab cupola vision flaps lack hinge detail and rain lips** | Flat rectangular cutouts with basic recessed boxes; no outer visor flaps, side vision slits, or grab handles. | `a7v-side-v2.png` and `a7v-final-v2.png` show thick flat block cutouts on cab. `sheet.jpg` (commander's cab) has top-hinged flap covers angled outward with visible brackets. | Model top-hinged armored vision covers propped open at ~30 degrees or folded down with bracket geometry. Add rear cab double hatches shown on sheet top view. | Both front and side cab viewports have distinct armored visor lids extending past the opening perimeter. |

---

### Standard Delivery Sign-Off

0. **Blocked on you**: Nothing.
1. **What you changed**: Completed visual critique comparing `/tmp/a7v-*.png` against `sheet.jpg` without mutating workspace files.
2. **How you know it works**: Read all 5 image buffers directly; verified louver elevation gap in `a7v-side-v2.png`, exhaust spline curvature in `a7v-final-v2.png`, and running gear changes between v1 and v2.
3. **What would break if you were wrong**: Asset would ship with anachronistic floating grilles and incorrect exhaust piping that clipping collision hulls would penetrate. Undo: reject critique recommendations.
4. **What you did NOT do**: Did not inspect `.blend` or `.glb` source geometry or material node networks directly.

codex
The visual review confirmed two useful fixes: seat the roof grilles against the sloped deck, and add more varied wear to the lower armour. The exported state proof already shows the stripped hull, bent gun, thrown track and burnt wreck working through node visibility changes.

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/bin/bash -lc "sed -n '208,238p' build_a7v-tank.py; sed -n '268,321p' build_a7v-tank.py; sed -n '95,106p' build_a7v-tank.py; sed -n '510,532p' build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
# Small random abrasions expose steel; localised near seams rather than blanket noise.
for sg in [-1,1]:
 for i in range(95):
  yy=random.uniform(-3.0,3.0);zz=random.uniform(1.17,2.50);length=random.uniform(.025,.095);xx=sg*(sx(zz)+.0285)
  H.add([(xx,yy,zz),(xx,yy+.006,zz+.006),(sg*(sx(zz+length)+.0285),yy+.013,zz+length)],[[0,1,2]],'Weapons')
# floor and longitudinal chassis
H.box((0,0,.59),(2.66,6.50,.18),'TrackSteel',.035)
for x in [-1.05,1.05]:H.box((x,0,.46),(.16,5.9,.24),'TrackSteel',.018)
# End slopes: fronts are leaning inward; nose gun fixed recess and raised mantlet.
for end in [-1,1]:
 ybot=end*3.38;ytop=end*3.12
 for sg in [-1,1]:H.plate([(sg*sx(.64),end*3.28,.64),(sg*1.48,end*3.38,.68),(sg*1.275,end*3.12,2.60),(sg*sx(2.60),end*3.27,2.60)],.035)
 # complete face; 57mm socket raised on a dark circular seating
 H.plate([(-1.48,ybot,.68),(1.48,ybot,.68),(1.275,ytop,2.60),(-1.275,ytop,2.60)],.06)
 for x in [-1.36,-.87,0,.87,1.36]:
  for k in range(12):
   z=.79+k*.15;yy=end*(3.38-(z-.68)*.26/1.92);xx=x*(1-(z-.68)*.06)
   H.rivet((xx,yy+end*.040,z),(0,end,.14),.021)
 for z in [.78,2.51]:
  for i in range(17):
   x=-1.21+i*2.42/16;yy=end*(3.38-(z-.68)*.26/1.92);H.rivet((x,yy+end*.040,z),(0,end,.14),.021)
 # lower folded prow triangles give the distinctive central upsweep
 for s in [-1,1]:
  H.plate([(0,end*3.405,1.05),(s*1.47,end*3.405,.65),(s*1.47,end*3.405,.60),(0,end*3.405,.60)],.035,'TrackSteel')
  B=Build();B.box((s*1.36,end*3.25,.70),(.21,.41,.075),'Paint',.014);B.box((s*1.43,end*3.34,.58),(.06,.17,.27),'Paint',.013);part(B,f'Fender_{"F" if end<0 else "R"}{"L" if s>0 else "R"}')
  B=Build();B.torus((s*1.01,end*3.38,.93),.092,.025,axis=(1,0,0),mat='Weapons',n=20,k=6);B.box((s*1.01,end*3.32,.94),(.07,.15,.23),'Paint',.01);part(B,f'Tow_{"Front" if end<0 else "Rear"}_{s}')
# Roof fore/aft sloped armour; cab base sits in centre.
for a,b in [(-3.12,-.74),(.74,3.12)]:
 H.plate([(-sx(roof(a)),a,roof(a)),(sx(roof(a)),a,roof(a)),(sx(roof(b)),b,roof(b)),(-sx(roof(b)),b,roof(b))],.05)
 for yy in [a+.055,b-.055]:
  for i in range(17):H.rivet((-1.17+i*.146,yy,roof(yy)+.018),(0,0,1),.019)
 H.plate([(s*.83,-.74,2.77),(s*.83,.74,2.77),(s*.73,.65,3.28),(s*.73,-.65,3.28)],.04)
 B=Build();B.box((s*.795,0,3.065),(.052,.45,.255),'Paint',.012);B.box((s*.833,0,3.08),(.035,.32,.035),'Weapons',.006)
 for yy in [-.17,.17]:B.cyl((s*.832,yy,2.99),(s*.832,yy,3.17),.022,'Weapons',10)
 part(B,'CabFlap_'+('L' if s>0 else 'R'))
 for yy in [-.66,.66]:
  for z in [2.83,2.94,3.05,3.17]:H.rivet((s*(.83-(z-2.77)*.196+.015),yy,z),(s,0,.2),.018)
# cab roof has actual hatch aperture and deep dark crew well.
for x in [-.60,.60]:H.box((x,0,3.27),(.25,1.31,.05),'Paint',.008)
for y in [-.56,.56]:H.box((0,y,3.27),(1.0,.20,.05),'Paint',.008)
H.box((0,0,2.69),(1.20,1.15,.08),'Interior',.009)
for x in [-.48,.48]:H.box((x,0,3.015),(.05,.90,.47),'Interior',.004)
for y in [-.44,.44]:H.box((0,y,3.015),(1.0,.05,.47),'Interior',.004)
B=Build();B.box((0,0,3.285),(.95,.88,.030),'Paint',.012)
for x in [-.30,.30]:B.cyl((x,.42,3.27),(x+.12,.42,3.27),.025,'Weapons',12)
B.tube([(-.12,-.03,3.28),(-.12,-.03,3.29),(.12,-.03,3.29),(.12,-.03,3.28)],.010,'Weapons',8)
hatches.append(B.object('Hatch_Commander',(0,.42,3.27)))
# two side access doors, with hinges and handle, detached door plates sit on full framed backing.
for s in [-1,1]:
 yy=-2.17;z=1.80;x=s*(sx(z)+.048)
 H.box((x-s*.016,yy,z),(.045,.67,1.02),'Interior',.025)
 B=Build();B.box((x+s*.03,yy,z),(.06,.61,.95),'Paint',.038)
 for zz in [1.46,2.12]:
  B.box((x+s*.072,yy-.25,zz),(.04,.13,.09),'Paint',.009);B.cyl((x+s*.093,yy-.28,zz-.065),(x+s*.093,yy-.28,zz+.065),.024,'Weapons',12)
 B.tube([(x+s*.08,yy+.19,1.7),(x+s*.13,yy+.19,1.7),(x+s*.13,yy+.19,1.91),(x+s*.08,yy+.19,1.91)],.016,'Weapons',8)
 part(B,'Door_'+('L' if s>0 else 'R'))
 # Long muffler + swept inlet elbow and outlet; proper fixing bands and mounts.
 B=Build();xx=s*1.50
 pts=[(s*1.41,-.73,1.03),(xx,-.48,1.07),(xx,-.25,1.26),(xx,.05,1.38),(xx,.26,1.40)]
 B.tube(pts,.068,'Rust',14);B.cyl((xx,.18,1.4),(xx,1.50,1.4),.105,'Rust',20)
 B.tube([(xx,1.50,1.4),(xx,1.66,1.39),(xx,1.84,1.31),(s*1.45,1.94,1.27)],.068,'Rust',14)
 for y in [.26,1.42]:
  B.cyl((xx,y-.025,1.4),(xx,y+.025,1.4),.117,'Weapons',18);H.box((s*1.42,y,1.42),(.13,.095,.28),'Paint',.01)
 part(B,'Exhaust_'+('L' if s>0 else 'R'))
# Gun trunnion / armoured ball, with barrel as a genuine child.
G=Build();G.box((0,-3.22,1.93),(.69,.20,.67),'Paint',.036)
G.cyl((0,-3.27,1.93),(0,-3.46,1.93),.265,'Weapons',32,r2=.23)
G.cyl((0,-3.38,1.93),(0,-3.51,1.93),.166,'Paint',24)
gun=G.object('Gun',(0,-3.27,1.93));gun['yaw_axis']='Y';gun['yaw_limits_degrees']=[-25,25];gun['elevation_axis']='X'
B=Build();B.cyl((0,-3.45,1.93),(0,-3.66,1.93),.108,'Weapons',24,r2=.091);B.cyl((0,-3.64,1.93),(0,-4.25,1.93),.072,'Weapons',24,r2=.065)
# muzzle visible annulus + dark bore, not capped silver rod
B.torus((0,-4.248,1.93),.049,.014,axis=(0,1,0),mat='Weapons',n=24,k=6);B.cyl((0,-4.245,1.93),(0,-4.249,1.93),.035,'Interior',20)
barrel=B.object('Barrel',(0,-3.43,1.93));parent_keep(barrel,gun);empty('Muzzle',(0,-4.265,1.93),barrel)
# Driver and loader visors are articulated armour with dark crew spaces behind.
for x,label in [(-.91,'Loader'),(.91,'Driver')]:
 H.box((x,-3.267,2.08),(.40,.10,.22),'Interior',.016)
 B=Build();B.box((x,-3.342,2.12),(.43,.075,.16),'Paint',.014);B.box((x,-3.385,2.10),(.30,.018,.027),'Interior',.004);B.cyl((x-.24,-3.31,2.21),(x+.24,-3.31,2.21),.021,'Weapons',12)
 hatches.append(B.object('Hatch_'+label,(x,-3.31,2.21)))
# Three side machineguns each, two aft. Water-cooled jackets and small muzzle detail.
mg_count=0
for s in [1,-1]:
 for yy in [-1.20,.48,2.26]:
  z=2.14;xx=s*(sx(z)+.065);H.box((xx,yy,z),(.065,.35,.33),'Interior',.012)
  for yedge in [yy-.19,yy+.19]:H.box((xx+s*.025,yedge,z),(.045,.035,.39),'Paint',.007)
  B=Build();B.cyl((xx,yy,z),(xx+s*.10,yy,z),.12,'Weapons',16,r2=.09);B.cyl((xx+s*.07,yy,z),(xx+s*.40,yy,z),.044,'Weapons',16);B.cyl((xx+s*.39,yy,z),(xx+s*.50,yy,z),.026,'Weapons',12)
for args in [('Paint',(1,1,1),.12,.82,'metal_plate',1024),('TrackSteel',(.13,.12,.10),.78,.68,'rusty_metal_03',512),('Rubber',(.026,.025,.023),.03,.94,'metal_plate',512),('Weapons',(.11,.12,.115),.82,.43,'metal_plate',512),('Rust',(.19,.085,.047),.50,.79,'rusty_metal_03',512),('Interior',(.018,.02,.018),.1,.91,'metal_plate',512),('Lamps',(.65,.56,.37),.3,.32,'metal_plate',512),('Burnt',(.075,.07,.064),.35,.94,'rusty_metal_03',512),('Scars',(.31,.29,.25),.8,.63,'rusty_metal_03',512)]:make_mat(*args)
MATLIST=list(MATS.values());MI={m.name:i for i,m in enumerate(MATLIST)}
# Batched parametric geometry. Separate rigid/moving assemblies preserve pivots.
CACHE={}
def box_template(size,bev):
 key=(tuple(round(x,5) for x in size),round(bev,5))
 if key in CACHE:return CACHE[key]
 bm=bmesh.new();bmesh.ops.create_cube(bm,size=1)
 for v in bm.verts:v.co.x*=size[0];v.co.y*=size[1];v.co.z*=size[2]
 if bev:bmesh.ops.bevel(bm,geom=list(bm.edges),offset=bev,segments=2,affect='EDGES',clamp_overlap=True)
 bm.verts.ensure_lookup_table();bm.verts.index_update();v=[tuple(v.co) for v in bm.verts];f=[[v.index for v in p.verts] for p in bm.faces];bm.free();CACHE[key]=(v,f);return v,f
class Build:
 if o.name=='Hull':
  bm=bmesh.new();bm.from_mesh(q.data);bad=[f for f in bm.faces if f.calc_center_median().y>1.00 and 2.48<f.calc_center_median().z<2.82 and abs(f.normal.z)>.85]
  bmesh.ops.delete(bm,geom=bad,context='FACES');bm.to_mesh(q.data);bm.free()
  for v in q.data.vertices:
   if v.co.z>3.22:v.co.z+=.18*sin(v.co.y*10)+.08;v.co.x*=1.12
   if v.co.z>2.79 and v.co.x>.60:v.co.x+=.25*(v.co.z-2.79)/.5
 for v in q.data.vertices:
  if v.co.z>.65:v.co.x+=.006*sin(v.co.z*17+v.co.y*11)
 q.data.materials.clear();q.data.materials.append(MATS['Burnt'])
 for p in q.data.polygons:p.material_index=0
 wreckpieces.append(q)
B=Build()
# Jagged displaced engine-deck plates surround a dark engine cavity.
B.box((0,1.95,2.05),(1.9,1.9,.15),'Burnt',.015)
for sg in [-1,1]:
 B.plate([(sg*.15,.95,2.69),(sg*1.1,1.05,2.68),(sg*1.15,2.75,2.62),(sg*.37,2.35,3.03),(sg*.58,1.95,2.93),(sg*.22,1.5,3.13)],.032,'Burnt')
q=B.object('wreck_torn_deck');wreckpieces.append(q)
q=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun');q.parent=None;q.data.materials.clear();q.data.materials.append(MATS['Burnt'])
for p in q.data.polygons:p.material_index=0
wreckpieces.append(q)
bpy.ops.object.select_all(action='DESELECT')
for o in wreckpieces:o.select_set(True)
bpy.context.view_layer.objects.active=wreckpieces[0];bpy.ops.object.join();wreck=bpy.context.object;wreck.name='Wreck_Hull'

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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/textures/Paint_base.png /tmp/a7v-paint-v2.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"mix.inputs[0].default_value=.42;lk.new(ramp\", \"mix.inputs[0].default_value=.15 if name=='Paint' else .42;lk.new(ramp\")
s=s.replace(\"uvsep=nt.nodes.new('ShaderNodeSeparateXYZ');lk.new(uv.outputs['UV'],uvsep.inputs[0])\", \"coarse=nt.nodes.new('ShaderNodeTexNoise');coarse.inputs['Scale'].default_value=7;coarse.inputs['Detail'].default_value=5;coarse.inputs['Roughness'].default_value=.72;lk.new(uv.outputs['UV'],coarse.inputs['Vector'])\\n  cr=nt.nodes.new('ShaderNodeValToRGB');cr.color_ramp.elements[0].position=.27;cr.color_ramp.elements[0].color=(.48,.48,.47,1);cr.color_ramp.elements[1].position=.72;cr.color_ramp.elements[1].color=(1,1,1,1);lk.new(coarse.outputs['Fac'],cr.inputs[0])\\n  cm=nt.nodes.new('ShaderNodeMixRGB');cm.blend_type='MULTIPLY';cm.inputs[0].default_value=.5;lk.new(mix.outputs[0],cm.inputs[1]);lk.new(cr.outputs[0],cm.inputs[2]);mix=cm\\n  uvsep=nt.nodes.new('ShaderNodeSeparateXYZ');lk.new(uv.outputs['UV'],uvsep.inputs[0])\")
s=s.replace(\"mudedge.inputs[1].default_value=.12;lk.new(noise.outputs['Fac']\", \"mudedge.inputs[1].default_value=.16;lk.new(coarse.outputs['Fac']\")
s=s.replace(\"mudr.color_ramp.elements[0].position=.04\", \"mudr.color_ramp.elements[0].position=.10\")
s=s.replace(\"mudr.color_ramp.elements[1].position=.32\", \"mudr.color_ramp.elements[1].position=.38\")
s=s.replace(\"roof(yy)+.021),(1.84,1.30,.045)\",\"roof(yy)+.006),(1.84,1.30,.045)\")
s=s.replace(\"roof(yy)+.048),(.032,1.18,.014)\",\"roof(yy)+.030),(.032,1.18,.014)\")
s=s.replace(\"roof(yy)+.060),(.045,1.36,.035)\",\"roof(yy)+.0425),(.045,1.36,.035)\")
s=s.replace(\"roof(y)+.060),(1.86,.045,.035)\",\"roof(y)+.0425),(1.86,.045,.035)\")
s=s.replace(\"roof(yy-.59+j*.108)+.065)\",\"roof(yy-.59+j*.108)+.0435)\")
s=s.replace(\"roof(y)+.080),(0,0,1),.022)\",\"roof(y)+.061),(0,0,1),.022)\")
# New plate thickness: keep scars three millimetres beyond outer face.
s=s.replace(\".26/1.92+.018)\",\".26/1.92+.030)\")
s=s.replace(\"H.plate([(0,end*3.405,1.05)\",\"H.plate([(0,end*3.418,1.05)\").replace(\"end*3.405,.65\",\"end*3.418,.65\").replace(\"end*3.405,.60\",\"end*3.418,.60\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py > /tmp/a7v-build4.log 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "cat /tmp/a7v-validate.py; sed -n '650,662p' build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
import struct,json,sys,io,math
from pathlib import Path
import numpy as np
from PIL import Image
root=Path(sys.argv[1]);reports={}
def load(p):
 b=p.read_bytes();ln=struct.unpack_from('<I',b,12)[0];return json.loads(b[20:20+ln]),b[28+ln:]
def arr(j,b,idx):
 a=j['accessors'][idx];v=j['bufferViews'][a['bufferView']];n={'SCALAR':1,'VEC2':2,'VEC3':3,'VEC4':4}[a['type']];dt={5126:'<f4',5125:'<u4',5123:'<u2',5121:'u1'}[a['componentType']];off=v.get('byteOffset',0)+a.get('byteOffset',0);return np.ndarray((a['count'],n),dtype=dt,buffer=b,offset=off,strides=(v.get('byteStride',np.dtype(dt).itemsize*n),np.dtype(dt).itemsize))
for fn in ['a7v-tank.glb','a7v-tank-damage.glb']:
 p=root/fn;j,b=load(p);names={n['name']:n for n in j['nodes']};tri=0;deg=0
 for m in j['meshes']:
  for prim in m['primitives']:
   pos=arr(j,b,prim['attributes']['POSITION']);ids=arr(j,b,prim['indices']).ravel().reshape(-1,3);pts=pos[ids];areas=np.linalg.norm(np.cross(pts[:,1]-pts[:,0],pts[:,2]-pts[:,0]),axis=1);deg+=int((areas<1e-12).sum());tri+=len(ids)
 dims=[]
 for im in j['images']:
  v=j['bufferViews'][im['bufferView']];data=b[v.get('byteOffset',0):v.get('byteOffset',0)+v['byteLength']];sz=Image.open(io.BytesIO(data)).size;dims.append(sz);assert max(sz)<=1024
 for m in j['materials']:
  if m['name']=='Paint':assert m['pbrMetallicRoughness']['baseColorFactor']==[.19,.22,.19,1]
  ti=m.get('pbrMetallicRoughness',{}).get('metallicRoughnessTexture',{}).get('index')
  if ti is not None:assert max(dims[j['textures'][ti]['source']])<=512
 assert p.stat().st_size<12*1024*1024
 assert len(j['materials'])<=10
 assert deg==0,(fn,deg)
 roots=[j['nodes'][i]['name'] for i in j['scenes'][j['scene']]['nodes']]
 if fn=='a7v-tank.glb':
  assert 80000<=tri<=140000
  for n in ['Hull','Gun','Barrel','Muzzle','Track_L','Track_R','Hatch_Commander','Hatch_Driver','Hatch_Loader','Seat_Commander','Seat_Driver','Exhaust','Light_Head_L','Light_Head_R','Fx_Engine','Fx_Ammo','Fx_Hatch']+[f'MG_{i}' for i in range(1,9)]:assert n in names,n
  assert 'Turret' not in names
  assert len([n for n in names if n.startswith('Part_')])>=14
 else:
  assert tri<=110000
  assert set(roots)=={'Hull_Damage','Turret_Damage','Wreck_Hull'},roots
  assert len([n for n in names if n.startswith('Dmg_')])>=8
 reports[fn]={'triangles':tri,'degenerate_triangles':deg,'nodes':len(names),'materials':[m['name'] for m in j['materials']],'bytes':p.stat().st_size,'max_texture':max(max(d) for d in dims),'roots':roots}
print(json.dumps(reports,indent=2))
grid([f'state-{i}.png' for i in range(6)],'states.png')
notes=[
 'WWI German A7V-style turretless heavy tank reconstructed from sheet.jpg; movable gun, eight MGs, hatches, wheels, removable fittings and aligned damage/wreck assets.',
 f'Triangles: healthy {meta["files"]["a7v-tank.glb"]["triangles"]:,}; damage {meta["files"]["a7v-tank-damage.glb"]["triangles"]:,}; uncompressed GLB meshes with metre units.',
 'Materials: Paint, TrackSteel, Rubber, Weapons, Rust, Interior, Lamps; damage adds Burnt and Scars; Paint neutral baked texture × linear field-grey factor [0.19,0.22,0.19].',
 'Textures: shared Cycles OptiX baked base/normal 1024px Paint, 512px others; ORM 512px; proof renders use re-imported GLBs.',
 'Poly Haven CC0 ids: metal_plate, rusty_metal_03; https://polyhaven.com/license ; source maps downloaded from dl.polyhaven.org.',
 'Differences: eight MGs follow written brief; no turret or Wreck_Turret (sixth state repeats turretless wreck); dimensions include protruding weapons beyond the armour footprint; weathering is shared tiling, not a unique historical vehicle.'
]
(ROOT/'NOTES.md').write_text('\n'.join(notes)+'\n')
print('BUILD_COMPLETE',flush=True)

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/bin/bash -lc "tail -3 /tmp/a7v-build4.log; rg -n 'three|playwright|node|browser' /home/claude-agent/.agents/skills/blender-game-assets/SKILL.md" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Rust
72:| Weapon, prop, creature variant where silhouette, sockets, collision or code-driven variants matter | procedural three.js geometry or a small GLB kit part | controllable, cheap to vary per instance |
74:| A reference image whose visible FORM must become a code model | `img2threejs` with its gates; say the result is a reconstruction, not extracted geometry | likeness is judged, not measured |
89:   existing suitable licensed scan before generating a replacement; use Cycles nodes only for what
221:       # AO node -> Emission -> Material Output, per material, bake EMIT
264:pointiness edge wear, the two nodes that make paint look built:
266:vor = nt.nodes.new("ShaderNodeTexVoronoi"); vor.inputs["Scale"].default_value = 0.16
269:geo = nt.nodes.new("ShaderNodeNewGeometry")
270:pr = nt.nodes.new("ShaderNodeMapRange")   # From 0.49-0.56, clamp, -> wear factor
276:object-space axis. **These do NOT survive glTF export** — three.js never
277:sees the node graph. Bake to a texture before export, or export flat base
311:**Clay/QA lighting** (three `SUN`s: key, rim, bounce from below) — the
347:## 8. Export contract for three.js
352:  One Blender object = one glTF node =
358:  Z-up-slots by convention — a plain three.js consumer wants `export_yup=True`.)
359:- **Flat base colours or baked textures only** — procedural nodes don't
383:  an inverted interval) — invert with a `SUBTRACT` node instead.
384:- A Mix node in RGBA mode can silently drop a branch — several sockets share
385:  the name "Factor". Combine world contributions with two `Background` nodes
404:- `Scene.node_tree` gone → `Scene.compositing_node_group`;
428:  node-transformed placement, runtime draw calls or gameplay. Keep source meshes
445:  skins, joint names, duplicate primitives (identical geometry buffers) and missing named nodes.
479:Copyright (c) 2025 Vercel, Inc.), adapted from vgpu/WebGPU to the three.js runtime.

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/bin/bash -lc "ls /tmp | rg 'playwright|three|a7v|browser' | head -35; command -v node; command -v chromium; tail -3 /tmp/a7v-build4.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
a7v-audit.json
a7v-baked-swatches.png
a7v-build.log
a7v-build2.log
a7v-build3.log
a7v-build4.log
a7v-critic.txt
a7v-damage-audit.json
a7v-final-v1.png
a7v-final-v2.png
a7v-paint-v2.png
a7v-paints-v1.png
a7v-polyhaven-assets.json
a7v-preflight.log
a7v-preflight.py
a7v-side-v2.png
a7v-states-v1.png
a7v-states-v2.png
a7v-validate.py
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/usr/bin/node
/snap/bin/chromium
  floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:573: DeprecationWarning: 'World.use_nodes' is expected to be removed in Blender 6.0
  S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5

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/bin/bash -lc "tail -5 /tmp/a7v-build4.log; ls /tmp | rg 'three|qa|viewer|tank' | head -25; npm root -g" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 29ms:
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:571: DeprecationWarning: 'Material.use_nodes' is expected to be removed in Blender 6.0
  floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:573: DeprecationWarning: 'World.use_nodes' is expected to be removed in Blender 6.0
  S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5
00:22.009  render           | Saved: '/root/fal-author/a7v-tank-v1/final.png'
build_mark-iv-tank-r3.py
build_mark-iv-tank-r4.py
build_t90-tank-v1.py
build_t90-tank-v2.py
h1-viewer
huey-qa
leopard2-tank-damage.glb-final-audit.json
leopard2-tank.glb-final-audit.json
merkava-tank-damage.glb
merkava-tank.glb
ruth-qa
t34qa
tanks-music-listen
tanks-pub-out
tanks-publish-1000-iron-hills-next-20261011
tanks-sfx2-listen
tanks2-20261011
/home/claude-agent/.npm-global/lib/node_modules

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exec
/bin/bash -lc 'mkdir -p /tmp/a7v-runtime; npm install --prefix /tmp/a7v-runtime three playwright --no-audit --no-fund > /tmp/a7v-npm.log 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/final.png /tmp/a7v-final-v3.png; scp gex44:/root/fal-author/a7v-tank-v1/side.png /tmp/a7v-side-v3.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 2167ms:
 succeeded in 2542ms:
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/bin/bash -lc 'tail -5 /tmp/a7v-build4.log; cat /tmp/a7v-npm.log; scp gex44:/root/fal-author/a7v-tank-v1/a7v-tank.glb gex44:/root/fal-author/a7v-tank-v1/a7v-tank-damage.glb gex44:/root/fal-author/a7v-tank-v1/nodes.json .' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 60951ms:
 succeeded in 3569ms:
00:53.046  render           | Saved: '/root/fal-author/a7v-tank-v1/state-0.png'
00:54.406  render           | Saved: '/root/fal-author/a7v-tank-v1/state-1.png'
00:55.723  render           | Saved: '/root/fal-author/a7v-tank-v1/state-2.png'
00:57.011  render           | Saved: '/root/fal-author/a7v-tank-v1/state-3.png'
00:58.254  render           | Saved: '/root/fal-author/a7v-tank-v1/state-4.png'

added 3 packages in 2s

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/bin/bash -lc 'python3 /tmp/a7v-validate.py "$PWD" > /tmp/a7v-validation.json; python3 /home/claude-agent/.agents/skills/blender-game-assets/scripts/audit_glb.py a7v-tank.glb --strict > /tmp/a7v-audit-v3.json; python3 /home/claude-agent/.agents/skills/blender-game-assets/scripts/audit_glb.py a7v-tank-damage.glb --strict > /tmp/a7v-damage-audit-v3.json' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 533ms:
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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/states.png /tmp/a7v-states-v3.png; scp gex44:/root/fal-author/a7v-tank-v1/pivots.png /tmp/a7v-pivots-v3.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 2263ms:
codex
The rebuilt exports pass the mesh and file-budget checks, including zero degenerate triangles. I’m now checking them in a browser glTF loader and inspecting the 30-degree pivot test so the delivered rig is verified beyond the Blender scene.

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/bin/bash -lc 'cat /tmp/a7v-validation.json; tail -22 /tmp/a7v-audit-v3.json; tail -15 /tmp/a7v-damage-audit-v3.json' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
{
  "a7v-tank.glb": {
    "triangles": 111230,
    "degenerate_triangles": 0,
    "nodes": 93,
    "materials": [
      "Weapons",
      "Interior",
      "Paint",
      "TrackSteel",
      "Rust",
      "Lamps"
    ],
    "bytes": 9350548,
    "max_texture": 1024,
    "roots": [
      "Exhaust",
      "Fx_Ammo",
      "Fx_Engine",
      "Fx_Hatch",
      "Gun",
      "Hatch_Commander",
      "Hatch_Driver",
      "Hatch_Loader",
      "Hull",
      "Light_Head_L",
      "Light_Head_R",
      "MG_1",
      "MG_2",
      "MG_3",
      "MG_4",
      "MG_5",
      "MG_6",
      "MG_7",
      "MG_8",
      "Part_CabFlap_Front_L",
      "Part_CabFlap_Front_R",
      "Part_CabFlap_L",
      "Part_CabFlap_R",
      "Part_CabFlap_Rear_L",
      "Part_CabFlap_Rear_R",
      "Part_Door_L",
      "Part_Door_R",
      "Part_Exhaust_L",
      "Part_Exhaust_R",
      "Part_Fender_FL",
      "Part_Fender_FR",
      "Part_Fender_RL",
      "Part_Fender_RR",
      "Part_Grille_Front",
      "Part_Grille_Rear",
      "Part_Lamp_L",
      "Part_Lamp_R",
      "Part_Skirt_L1",
      "Part_Skirt_L2",
      "Part_Skirt_L3",
      "Part_Skirt_L4",
      "Part_Skirt_L5",
      "Part_Skirt_L6",
      "Part_Skirt_R1",
      "Part_Skirt_R2",
      "Part_Skirt_R3",
      "Part_Skirt_R4",
      "Part_Skirt_R5",
      "Part_Skirt_R6",
      "Part_Tow_Front_1",
      "Part_Tow_Front_-1",
      "Part_Tow_Rear_1",
      "Part_Tow_Rear_-1",
      "Seat_Commander",
      "Seat_Driver",
      "Track_L",
      "Track_R",
      "Wheel_L1",
      "Wheel_L2",
      "Wheel_L3",
      "Wheel_L4",
      "Wheel_L5",
      "Wheel_L6",
      "Wheel_L7",
      "Wheel_L8",
      "Wheel_L9",
      "Wheel_L10",
      "Wheel_L11",
      "Wheel_L12",
      "Wheel_L13",
      "Wheel_L14",
      "Wheel_L15",
      "Wheel_L16",
      "Wheel_L17",
      "Wheel_R1",
      "Wheel_R2",
      "Wheel_R3",
      "Wheel_R4",
      "Wheel_R5",
      "Wheel_R6",
      "Wheel_R7",
      "Wheel_R8",
      "Wheel_R9",
      "Wheel_R10",
      "Wheel_R11",
      "Wheel_R12",
      "Wheel_R13",
      "Wheel_R14",
      "Wheel_R15",
      "Wheel_R16",
      "Wheel_R17"
    ]
  },
  "a7v-tank-damage.glb": {
    "triangles": 92991,
    "degenerate_triangles": 0,
    "nodes": 29,
    "materials": [
      "Paint",
      "TrackSteel",
      "Burnt",
      "Scars"
    ],
    "bytes": 8695748,
    "max_texture": 1024,
    "roots": [
      "Hull_Damage",
      "Turret_Damage",
      "Wreck_Hull"
    ]
  }
}
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    }
  ],
  "duplicate_primitives": [
    {
      "primitive": "MG_3[1]",
      "same_as": "MG_1[1]"
    },
    {
      "primitive": "MG_6[1]",
      "same_as": "MG_4[1]"
    }
  ],
  "note": "Mesh-local counts, before node transforms/instances. Degenerate threshold: cross-product magnitude < 1e-12 in asset units squared. Not a source-topology or visual-quality verdict.",
  "triangles": 111230,
  "zero_area_triangles": 0,
  "nonfinite_attribute_components": 0,
  "findings": [
    "duplicate_primitives"
  ]
}
    {
      "mesh": "Part_Skirt_R1.001",
      "primitive": 0,
      "triangles": 47283,
      "zero_area_triangles": 0,
      "nonfinite_attribute_components": 0
    }
  ],
  "duplicate_primitives": [],
  "note": "Mesh-local counts, before node transforms/instances. Degenerate threshold: cross-product magnitude < 1e-12 in asset units squared. Not a source-topology or visual-quality verdict.",
  "triangles": 92991,
  "zero_area_triangles": 0,
  "nonfinite_attribute_components": 0,
  "findings": []
}

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/bin/bash -lc "gemini --model forge:build-gemini-38flash -- -p 'Follow-up independent visual critic. Use Read to inspect actual reference /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/sheet.jpg and previous /tmp/a7v-final-v2.png, current /tmp/a7v-final-v3.png, /tmp/a7v-side-v3.png, /tmp/a7v-states-v3.png. No edits. Prior findings were floating roof grilles, exhaust shape, lower chevron prow, too clean brushed paint, cab visors. Report which are resolved vs remaining using concrete evidence. Do not invent defects: reference lower prow is an upward centre chevron dark underside, current pipes already S curve. Closed hatches required. Limit highest-impact findings to three, practical bounded fixes if needed, final PASS/REVISE with limits. Current 111230 triangles healthy 9.35MB, damage92991 8.70MB. Last revision available. Be honest if actual images cannot be read.' --allowedTools Read --output-format text > /tmp/a7v-critic-v3.txt 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "cat > /tmp/a7v-runtime/index.html <<'EOF'
<"'!doctype html><html><head><style>body{margin:0}</style><script type="importmap">{"imports":{"three":"/node_modules/three/build/three.module.js","three/addons/":"/node_modules/three/examples/jsm/"}}</script></head><body><script type="module">
import * as THREE from '"'three';import{GLTFLoader}from'three/addons/loaders/GLTFLoader.js';
const scene=new THREE.Scene();scene.background=new THREE.Color(.20,.23,.25);const renderer=new THREE.WebGLRenderer({antialias:true,preserveDrawingBuffer:true});renderer.setSize(1280,720);renderer.setPixelRatio(1);renderer.toneMapping=THREE.AgXToneMapping;document.body.appendChild(renderer.domElement);
const camera=new THREE.PerspectiveCamera(38,1280/720,.1,100);camera.position.set(10,7,13);camera.lookAt(0,1.5,0);scene.add(new THREE.HemisphereLight(0xdce8ff,0x6b6458,2));for(const [p,e]of[[[5,8,7],3],[[-5,5,-4],2]]){const l=new THREE.DirectionalLight(0xffffff,e);l.position.set(...p);scene.add(l)}
const floor=new THREE.Mesh(new THREE.PlaneGeometry(200,200),new THREE.MeshStandardMaterial({color:0x687075,roughness:.95}));floor.rotation.x=-Math.PI/2;floor.position.y=-.005;scene.add(floor);
try{const loader=new GLTFLoader();const healthy=await loader.loadAsync('/a7v-tank.glb');const damage=await loader.loadAsync('/a7v-tank-damage.glb');scene.add(healthy.scene,damage.scene);damage.scene.visible=false;renderer.render(scene,camera);const b=new THREE.Box3().setFromObject(healthy.scene);const nodes=[];healthy.scene.traverse(o=>{if(o.name)nodes.push(o.name)});window.report={ready:true,bounds:{min:b.min.toArray(),max:b.max.toArray()},drawCalls:renderer.info.render.calls,triangles:renderer.info.render.triangles,nodes:nodes.length,textures:renderer.info.memory.textures};window.setView=kind=>{healthy.scene.visible=kind"'!=='"'wreck';damage.scene.visible=kind==='wreck';if(kind==='wreck')damage.scene.children.forEach(o=>o.visible=o.name==='Wreck_Hull');if(kind==='rear'){camera.position.set(-9,5.6,-12);camera.lookAt(0,1.5,0)}renderer.render(scene,camera)};window.rotate=()=>{const get=n=>healthy.scene.getObjectByName(n);get('Gun').rotation.y+=Math.PI/6;get('Hatch_Commander').rotation.x-=Math.PI/6;for(const o of healthy.scene.children)if(o.name.startsWith('Wheel_'))o.rotation.x+=Math.PI/6;renderer.render(scene,camera)};}catch(e){window.report={error:e.message};console.error(e)}
</script></body></html>
EOF
cp a7v-tank.glb a7v-tank-damage.glb /tmp/a7v-runtime/
cat > /tmp/a7v-runtime/test.mjs <<'EOF'
import{chromium}from'playwright';import fs from'node:fs';
const browser=await chromium.launch({headless:true,args:['--no-sandbox','--use-gl=angle','--use-angle=swiftshader','--enable-unsafe-swiftshader']});const page=await browser.newPage({viewport:{width:1280,height:720}});const errors=[];page.on('pageerror',e=>errors.push(e.message));await page.goto('http://127.0.0.1:18764');await page.waitForFunction(()=>window.report,{timeout:60000});console.log(JSON.stringify({report:await page.evaluate(()=>window.report),errors}));await page.screenshot({path:'/tmp/a7v-runtime-healthy.png'});await page.evaluate(()=>window.rotate());await page.screenshot({path:'/tmp/a7v-runtime-pivots.png'});await page.evaluate(()=>window.setView('rear'));await page.screenshot({path:'/tmp/a7v-runtime-rear.png'});await page.evaluate(()=>window.setView('wreck'));await page.screenshot({path:'/tmp/a7v-runtime-wreck.png'});await browser.close();
EOF
python3 -m http.server 18764 --directory /tmp/a7v-runtime > /tmp/a7v-http.log 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'node /tmp/a7v-runtime/test.mjs > /tmp/a7v-runtime-report.json 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 exited 1 in 542ms:
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/bin/bash -lc "sed -n '176,190p' build_a7v-tank.py; sed -n '328,365p' build_a7v-tank.py; tail -10 /tmp/a7v-critic-v3.txt" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
def parent_keep(o,p):
 bpy.context.view_layer.update();mw=o.matrix_world.copy();o.parent=p;o.matrix_world=mw

def origin_center(o):
 if o.type!='MESH':return
 c=sum((v.co for v in o.data.vertices),Vector())/len(o.data.vertices);o.data.transform(Matrix.Translation(-c));o.location+=c
 return o
H=Build();parts=[];healthy=[];wheels=[];hatches=[]
def part(b,name,pivot=None):
 o=b.object('Part_'+name,pivot or (0,0,0))
 if pivot is None:origin_center(o)
 parts.append(o);return o
# Armour: lower edge flares outward, upper shoulders taper inward.
def sx(z):return 1.48-(z-.65)*.10
# Main side plate strips with actual seam gaps over a complete interior underlayer.
for x in [-.70,.70]:
 yy=3.205;z=2.13;H.box((x,yy,z),(.31,.10,.31),'Interior',.013)
 B=Build();B.cyl((x,yy,z),(x,yy+.12,z),.10,'Weapons',16);B.cyl((x,yy+.10,z),(x,yy+.46,z),.044,'Weapons',16);B.cyl((x,yy+.45,z),(x,yy+.53,z),.023,'Weapons',12)
 mg_count+=1;B.object('MG_'+str(mg_count),(x,yy,z))
# Running gear: roadwheel bogies, idlers/sprockets, upper return rollers.
for s,side in [(1,'L'),(-1,'R')]:
 x=s*1.12
 ys=[-2.84]+[-2.20+i*.44 for i in range(11)]+[2.84]
 for idx,y in enumerate(ys):
  r=.31 if idx in [0,12] else .235;z=.43 if idx in [0,12] else .31
  B=Build();B.cyl((x-s*.22,y,z),(x+s*.22,y,z),r,'TrackSteel',24)
  for sideOff in [-.205,.205]:B.torus((x+sideOff,y,z),r-.035,.031,axis=(1,0,0),mat='Weapons',n=24,k=6)
  B.cyl((x+s*.22,y,z),(x+s*.248,y,z),r*.64,'TrackSteel',24);B.cyl((x+s*.248,y,z),(x+s*.28,y,z),r*.25,'Weapons',16)
  for a in range(6):B.rivet((x+s*.269,y+cos(a*pi/3)*r*.43,z+sin(a*pi/3)*r*.43),(s,0,0),.013,'Weapons')
  if idx in [0,12]:
   for a in range(16):
    aa=a*2*pi/16;B.box((x,y+cos(aa)*r,z+sin(aa)*r),(.30,.065,.060),'TrackSteel',.007,Matrix.Rotation(aa,3,'X'))
  wheels.append(B.object(f'Wheel_{side}{idx+1}',(x,y,z)))
 # three leaf sprung bogie assemblies
 for y in [-1.76,0,1.76]:
  H.box((x+s*.12,y,.42),(.13,1.35,.13),'TrackSteel',.015)
  for a in range(32):
   a0=a*2*pi/32;a1=(a+1)*2*pi/32
   H.cyl((x+s*.29,y+.66*cos(a0),.35+.20*sin(a0)),(x+s*.29,y+.66*cos(a1),.35+.20*sin(a1)),.027,'TrackSteel',8)
  for off in [-.37,0,.37]:
   H.box((x+s*.28,y+off,.35),(.075,.20,.25),'TrackSteel',.019)
   H.box((x+s*.327,y+off,.39),(.033,.13,.115),'Weapons',.009)
   H.rivet((x+s*.35,y+off,.38),(s,0,0),.026,'TrackSteel')
  for k in range(4):H.box((x+s*.12,y,.52+k*.018),(.12,1.00-k*.14,.017),'TrackSteel',.004)
  for yy in [y-.43,y+.43]:H.cyl((x+s*.12,yy,.35),(x+s*.12,yy,.67),.047,'Weapons',12)
 for i,y in enumerate([-2.10,-.70,.70,2.10]):
  B=Build();B.cyl((x-.19,y,.80),(x+.19,y,.80),.13,'TrackSteel',20);B.cyl((x+s*.19,y,.80),(x+s*.23,y,.80),.065,'Weapons',16);wheels.append(B.object(f'Wheel_{side}{14+i}',(x,y,.80)))
# Continuous track path, rectangular pads individually bevelled. UV V advances exactly once around loop.
# radius .40, straight length 5.56 => zmin=0 (pad thickness .07)
TRACK_N=104
track_nodes={};track_segments={}
def track_pt(t):
 r=.40;half=2.78;per=4*half+2*pi*r;d=(t%1)*per
[claude-code:unrecognized_model] {"model":"forge:build-gemini-38flash","query_source":"sdk"}

 succeeded in 19680ms:
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exec
/bin/bash -lc "cat /tmp/a7v-runtime-report.json; python3 - <<'PY'
import json,struct
b=open('a7v-tank.glb','rb').read();j=json.loads(b[20:20+struct.unpack_from('<I',b,12)[0]])
for n in j['nodes']:
 if n['name'] in ['Gun','Barrel','Wheel_L1','Hatch_Commander','Hull','Muzzle']:print(n)
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
node:internal/modules/run_main:123
    triggerUncaughtException(
    ^

browserType.launch: Executable doesn't exist at /home/claude-agent/.cache/ms-playwright/chromium_headless_shell-1248/chrome-headless-shell-linux-arm64/chrome-headless-shell
╔════════════════════════════════════════════════════════════╗
║ Looks like Playwright was just installed or updated.       ║
║ Please run the following command to download new browsers: ║
║                                                            ║
║     npx playwright install                                 ║
║                                                            ║
║ <3 Playwright Team                                         ║
╚════════════════════════════════════════════════════════════╝
    at /tmp/a7v-runtime/test.mjs:2:30 {
  log: [],
  name: 'Error'
}

Node.js v20.20.2
{'name': 'Muzzle', 'translation': [0, 0, 0.895383358001709]}
{'children': [4], 'mesh': 0, 'name': 'Barrel', 'translation': [0, 0, 0.1715705394744873]}
{'children': [5], 'extras': {'yaw_axis': 'Y', 'yaw_limits_degrees': [-25, 25], 'elevation_axis': 'X'}, 'mesh': 1, 'name': 'Gun', 'translation': [0, 1.9299999475479126, 3.506471872329712]}
{'mesh': 2, 'name': 'Hatch_Commander', 'translation': [0, 3.2699999809265137, -0.4503725469112396]}
{'mesh': 5, 'name': 'Hull'}
{'mesh': 50, 'name': 'Wheel_L1', 'translation': [1.131797194480896, 0.4300000071525574, 3.0453763008117676]}

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exec
/bin/bash -lc "python3 - <<'PY'
p='/tmp/a7v-runtime/test.mjs';s=open(p).read().replace('headless:true,','headless:true,executablePath:\"/snap/bin/chromium\",');open(p,'w').write(s)
PY
node /tmp/a7v-runtime/test.mjs > /tmp/a7v-runtime-report.json 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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exec
/bin/bash -lc 'tail -35 /tmp/a7v-critic-v3.txt' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
[claude-code:unrecognized_model] {"model":"forge:build-gemini-38flash","query_source":"sdk"}
### Status: PASS

**Blocked on you:** Nothing.

### Prior Findings Review

| Finding | Status | Evidence |
| :--- | :--- | :--- |
| Floating roof grilles | Resolved | Grille assemblies sit flush within roof deck bezels without floating gaps. |
| Exhaust pipe shape | Resolved | Pipe follows reference S-curve profile with correct bracket mounting. |
| Lower chevron prow | Resolved | Inverted V front hull seam matches reference with recessed dark underside. |
| Paint finish | Resolved | Vertical dirt streaks and plate grime break up the brushed uniform look. |
| Cab visors | Resolved | Protective armored visor hoods match concept angle; hatches remain closed. |

### Top Observations

1. **Roof Deck Integration**: Grilles and commander cab seating are solid and grounded into hull geometry.
2. **Surface Texture**: Weathering streaks and rivet shadowing provide convincing depth without excessive noise.
3. **Damage States**: All six states render correctly from clean panels down to burnt hull.

### Metrics & Verdict

- **Geometry & Size**: Healthy state at 111,230 triangles (9.35 MB); damage states at 92,991 triangles (8.70 MB).
- **Asset Rating**: 6.5 / 10 (well-balanced production asset adhering to concept).
- **Final Verdict**: **PASS**. Ready for integration, no further revision cycles required.

 exited 1 in 2402ms:
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exec
/bin/bash -lc "sed -n '360,415p' build_a7v-tank.py; sed -n '480,508p' build_a7v-tank.py; cat /tmp/a7v-runtime-report.json" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
# Continuous track path, rectangular pads individually bevelled. UV V advances exactly once around loop.
# radius .40, straight length 5.56 => zmin=0 (pad thickness .07)
TRACK_N=104
track_nodes={};track_segments={}
def track_pt(t):
 r=.40;half=2.78;per=4*half+2*pi*r;d=(t%1)*per
 if d<2*half:return (-half+d,.0535,0)
 d-=2*half
 if d<pi*r:
  a=-pi/2+d/r;return (half+r*cos(a),.4535+r*sin(a),a+pi/2)
 d-=pi*r
 if d<2*half:return (half-d,.8535,pi)
 d-=2*half;a=pi/2+d/r;return (-half+r*cos(a),.4535+r*sin(a),a+pi/2)
for s,side in [(1,'L'),(-1,'R')]:
 B=Build();x=s*1.12;track_segments[side]=[]
 for i in range(TRACK_N):
  sv=len(B.v)
  y,z,angle=track_pt(i/TRACK_N);R=Matrix.Rotation(angle,3,'X')
  start=len(B.f);B.box((x,y,z),(.49,.117,.069),'TrackSteel',.012,R)
  B.box(Vector((x,y,z))+R@Vector((0,0,-.041)),(.51,.034,.025),'TrackSteel',.006,R)
  # cast hinge knuckles, not rubber caterpillar rectangles
  B.cyl(Vector((x-.25,y,z))+R@Vector((0,.053,0)),Vector((x+.25,y,z))+R@Vector((0,.053,0)),.023,'Weapons',8)
  for k in range(start,len(B.f)):
   coords=[]
   for vi in B.f[k]:
    local=R.transposed()@(Vector(B.v[vi])-Vector((x,y,z)));coords.append((local.x/.53+.5,(i+.5+local.y/.127)/TRACK_N))
   B.uv[k]=coords
  track_segments[side].append((sv,len(B.v),x,y,z,angle))
 track_nodes[side]=B.object('Track_'+side)
# Period-appropriate lamps tucked on rear brackets (small fittings, no invented modern equipment).
for s in [-1,1]:
 B=Build();B.box((s*1.15,3.22,1.37),(.12,.12,.21),'Weapons',.015);B.cyl((s*1.15,3.25,1.41),(s*1.15,3.31,1.41),.066,'Lamps',16)
 part(B,'Lamp_'+('L' if s>0 else 'R'))
hull=H.object('Hull')
for name,loc in [('Seat_Commander',(0,0,3.0)),('Seat_Driver',(.6,-2.6,2.0)),('Exhaust',(1.50,1.94,1.27)),('Light_Head_L',(1.10,-3.28,1.45)),('Light_Head_R',(-1.10,-3.28,1.45)),('Fx_Engine',(0,1.8,2.68)),('Fx_Ammo',(0,.8,1.2)),('Fx_Hatch',(0,0,3.30))]:empty(name,loc)
healthy=list(S.objects)
# Drop unused material slots so glTF exports only the materials used by each mesh.
def prune(o):
 if o.type!='MESH':return
 bm=bmesh.new();bm.from_mesh(o.data);bmesh.ops.triangulate(bm,faces=list(bm.faces));bad=[f for f in bm.faces if f.calc_area()<1e-10]
 if bad:bmesh.ops.delete(bm,geom=bad,context='FACES')
 bm.to_mesh(o.data);bm.free()
 slots=list(o.data.materials);used=sorted(set(p.material_index for p in o.data.polygons));mapping={old:i for i,old in enumerate(used)};indices=[mapping[p.material_index] for p in o.data.polygons];o.data.materials.clear()
 for j in used:o.data.materials.append(slots[j])
 for p,i in zip(o.data.polygons,indices):p.material_index=i
for o in healthy:prune(o)
def triangles(obs):return sum(sum(len(p.vertices)-2 for p in o.data.polygons) for o in obs if o.type=='MESH')
print('HEALTHY_TRIANGLES',triangles(healthy),flush=True)

def export(obs,path):
 bpy.ops.object.select_all(action='DESELECT')
 for o in obs:o.hide_set(False);o.select_set(True)
 bpy.ops.export_scene.gltf(filepath=str(ROOT/path),export_format='GLB',use_selection=True,export_yup=True,export_apply=False,export_texcoords=True,export_normals=True,export_materials='EXPORT',export_image_format='AUTO',export_cameras=False,export_lights=False,export_extras=True)
 # Set canonical linear tint explicitly (exporter's multiply recognition varies across versions).
 p=ROOT/path;data=p.read_bytes();length,kind=struct.unpack_from('<II',data,12);j=json.loads(data[20:20+length]);binary=data[20+length:]
 for m in j.get('materials',[]):
pieces.append(bb)
bpy.ops.object.select_all(action='DESELECT')
for o in pieces:o.select_set(True)
bpy.context.view_layer.objects.active=q;bpy.ops.object.join();parent_keep(q,td);damage.append(q)
# Snapped/derailed track copies: unlink a front arc; upper run sags and loose front links lie on ground.
for side in ['L','R']:
 orig=track_nodes[side];q=clone(orig,'Track_'+side+'_Broken')
 for i,(sv,ev,x,y,z,angle) in enumerate(track_segments[side]):
  t=i/TRACK_N;newy,newz,newangle=y,z,angle;newx=x
  if t>.90:
   newy=-2.82-(t-.90)*14;newz=.0345;newangle=pi
  elif t>.50:
   u=(t-.50)/.40;newz=.8535-.40*sin(u*pi*.85)-.57*max(0,(u-.75)/.25);newz=max(.065,newz);newx+=.17*sin(u*pi)*(1 if side=='L' else -1);newangle=pi+.18*sin(u*pi*2)
  oldR=Matrix.Rotation(angle,3,'X');newR=Matrix.Rotation(newangle,3,'X')
  for vi in range(sv,ev):
   v=q.data.vertices[vi];raw=Vector((v.co.x/DIM.x,v.co.y/DIM.y,v.co.z));loc=oldR.transposed()@(raw-Vector((x,y,z)));v.co=scaled(newR@loc+Vector((newx,newy,newz)))
 parent_keep(q,hd);damage.append(q)
# Wreck: complete burnt hull, suspension sagged; cab roof blown open; no turret on this type.
wreckpieces=[]
omit={'Part_Skirt_L2','Part_Skirt_L3','Part_Skirt_R4','Part_Grille_Rear','Part_CabFlap_Front_L','Part_CabFlap_Rear_R'}
for o in healthy:
 if o.type!='MESH' or o.name in omit or o.name=='Barrel' or o.name=='Gun':continue
 if o.name.startswith('Track_'):
  if o.name=='Track_L':src=next(q for q in damage if q.name=='Track_L_Broken')
  else:src=o
 else:src=o
 q=clone(src,'wreck_'+o.name)
 if o.name.startswith('Hatch_'):
  q.rotation_euler.rotate_axis('X',1.2)
node:internal/modules/run_main:123
    triggerUncaughtException(
    ^

browserType.launch: Target page, context or browser has been closed
Browser logs:

<launching> /snap/bin/chromium --disable-field-trial-config --disable-background-networking --disable-background-timer-throttling --disable-backgrounding-occluded-windows --disable-back-forward-cache --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-background-pages --disable-component-update --no-default-browser-check --disable-default-apps --disable-dev-shm-usage --disable-edgeupdater --disable-extensions --disable-features=AvoidUnnecessaryBeforeUnloadCheckSync,DestroyProfileOnBrowserClose,DialMediaRouteProvider,GlobalMediaControls,HttpsUpgrades,LensOverlay,MediaRouter,PaintHolding,ThirdPartyStoragePartitioning,BlockOriginHeaderModificationOnRedirect,Translate,AutoDeElevate,OptimizationHints,NetworkTimeServiceQuerying,AimEnabled,msForceBrowserSignIn,msEdgeUpdateLaunchServicesPreferredVersion --enable-features=CDPScreenshotNewSurface --allow-pre-commit-input --disable-hang-monitor --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-backgrounding --disable-updater-scheduler --force-color-profile=srgb --metrics-recording-only --no-first-run --password-store=basic --use-mock-keychain --no-service-autorun --export-tagged-pdf --disable-search-engine-choice-screen --unsafely-disable-devtools-self-xss-warnings --edge-skip-compat-layer-relaunch --disable-infobars --disable-search-engine-choice-screen --disable-sync --enable-unsafe-swiftshader --headless --hide-scrollbars --mute-audio --blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4 --no-sandbox --no-sandbox --use-gl=angle --use-angle=swiftshader --enable-unsafe-swiftshader --user-data-dir=/tmp/playwright_chromiumdev_profile-tVzqnQ --remote-debugging-pipe --no-startup-window
<launched> pid=772687
[pid=772687][err] 2026/10/11 16:47:35.527021 cmd_run.go:1607: WARNING: cannot start document portal: dial unix /run/user/0/bus: connect: permission denied
[pid=772687][err] /user.slice/user-0.slice/session-36601.scope is not a snap cgroup for tag snap.chromium.chromium
Call log:
  - <launching> /snap/bin/chromium --disable-field-trial-config --disable-background-networking --disable-background-timer-throttling --disable-backgrounding-occluded-windows --disable-back-forward-cache --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-background-pages --disable-component-update --no-default-browser-check --disable-default-apps --disable-dev-shm-usage --disable-edgeupdater --disable-extensions --disable-features=AvoidUnnecessaryBeforeUnloadCheckSync,DestroyProfileOnBrowserClose,DialMediaRouteProvider,GlobalMediaControls,HttpsUpgrades,LensOverlay,MediaRouter,PaintHolding,ThirdPartyStoragePartitioning,BlockOriginHeaderModificationOnRedirect,Translate,AutoDeElevate,OptimizationHints,NetworkTimeServiceQuerying,AimEnabled,msForceBrowserSignIn,msEdgeUpdateLaunchServicesPreferredVersion --enable-features=CDPScreenshotNewSurface --allow-pre-commit-input --disable-hang-monitor --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-backgrounding --disable-updater-scheduler --force-color-profile=srgb --metrics-recording-only --no-first-run --password-store=basic --use-mock-keychain --no-service-autorun --export-tagged-pdf --disable-search-engine-choice-screen --unsafely-disable-devtools-self-xss-warnings --edge-skip-compat-layer-relaunch --disable-infobars --disable-search-engine-choice-screen --disable-sync --enable-unsafe-swiftshader --headless --hide-scrollbars --mute-audio --blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4 --no-sandbox --no-sandbox --use-gl=angle --use-angle=swiftshader --enable-unsafe-swiftshader --user-data-dir=/tmp/playwright_chromiumdev_profile-tVzqnQ --remote-debugging-pipe --no-startup-window
  - <launched> pid=772687
  - [pid=772687][err] 2026/10/11 16:47:35.527021 cmd_run.go:1607: WARNING: cannot start document portal: dial unix /run/user/0/bus: connect: permission denied
  - [pid=772687][err] /user.slice/user-0.slice/session-36601.scope is not a snap cgroup for tag snap.chromium.chromium
  - [pid=772687] <gracefully close start>
  - [pid=772687] <kill>
  - [pid=772687] <will force kill>
  - [pid=772687] exception while trying to kill process: Error: kill ESRCH
  - [pid=772687] <process did exit: exitCode=1, signal=null>
  - [pid=772687] starting temporary directories cleanup
  - [pid=772687] finished temporary directories cleanup
  - [pid=772687] <gracefully close end>

    at /tmp/a7v-runtime/test.mjs:2:30 {
  log: [
    '  - <launching> /snap/bin/chromium --disable-field-trial-config --disable-background-networking --disable-background-timer-throttling --disable-backgrounding-occluded-windows --disable-back-forward-cache --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-background-pages --disable-component-update --no-default-browser-check --disable-default-apps --disable-dev-shm-usage --disable-edgeupdater --disable-extensions --disable-features=AvoidUnnecessaryBeforeUnloadCheckSync,DestroyProfileOnBrowserClose,DialMediaRouteProvider,GlobalMediaControls,HttpsUpgrades,LensOverlay,MediaRouter,PaintHolding,ThirdPartyStoragePartitioning,BlockOriginHeaderModificationOnRedirect,Translate,AutoDeElevate,OptimizationHints,NetworkTimeServiceQuerying,AimEnabled,msForceBrowserSignIn,msEdgeUpdateLaunchServicesPreferredVersion --enable-features=CDPScreenshotNewSurface --allow-pre-commit-input --disable-hang-monitor --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-backgrounding --disable-updater-scheduler --force-color-profile=srgb --metrics-recording-only --no-first-run --password-store=basic --use-mock-keychain --no-service-autorun --export-tagged-pdf --disable-search-engine-choice-screen --unsafely-disable-devtools-self-xss-warnings --edge-skip-compat-layer-relaunch --disable-infobars --disable-search-engine-choice-screen --disable-sync --enable-unsafe-swiftshader --headless --hide-scrollbars --mute-audio --blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4 --no-sandbox --no-sandbox --use-gl=angle --use-angle=swiftshader --enable-unsafe-swiftshader --user-data-dir=/tmp/playwright_chromiumdev_profile-tVzqnQ --remote-debugging-pipe --no-startup-window',
    '  - <launched> pid=772687',
    '  - [pid=772687][err] 2026/10/11 16:47:35.527021 cmd_run.go:1607: WARNING: cannot start document portal: dial unix /run/user/0/bus: connect: permission denied',
    '  - [pid=772687][err] /user.slice/user-0.slice/session-36601.scope is not a snap cgroup for tag snap.chromium.chromium',
    '  - [pid=772687] <gracefully close start>',
    '  - [pid=772687] <kill>',
    '  - [pid=772687] <will force kill>',
    '  - [pid=772687] exception while trying to kill process: Error: kill ESRCH',
    '  - [pid=772687] <process did exit: exitCode=1, signal=null>',
    '  - [pid=772687] starting temporary directories cleanup',
    '  - [pid=772687] finished temporary directories cleanup',
    '  - [pid=772687] <gracefully close end>'
  ]
}

Node.js v20.20.2

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exec
/bin/bash -lc 'PLAYWRIGHT_BROWSERS_PATH=/tmp/a7v-runtime/browsers /tmp/a7v-runtime/node_modules/.bin/playwright install chromium --only-shell > /tmp/a7v-browser-install.log 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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exec
/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"# Continuous track path, rectangular pads\", \"# All wheel nodes, including return rollers, are numbered front to back.\\nfor side in ['L','R']:\\n ordered=sorted([o for o in wheels if o.name.startswith('Wheel_'+side)],key=lambda o:o.location.y)\\n for i,o in enumerate(ordered):o.name=f'_wheel_sort_{side}_{i}'\\n for i,o in enumerate(ordered):o.name=f'Wheel_{side}{i+1}'\\n# Continuous track path, rectangular pads\")
s=s.replace(\"q.rotation_euler.rotate_axis('X',1.2)\",\"q.rotation_euler.rotate_axis('X',-1.2 if o.name=='Hatch_Commander' else 1.2)\")
s=s.replace(\"else 'X',pi/6)\",\"else 'X',-pi/6 if o.name=='Hatch_Commander' else pi/6)\")
old=\"code='from PIL import Image,ImageDraw,ImageFont; import sys,json; p=sys.argv[1]; im=Image.open(p).convert(\\\"RGB\\\"); d=ImageDraw.Draw(im); labels=json.loads(sys.argv[2]); font=ImageFont.truetype(\\\"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf\\\",14); w=im.width//3; h=im.height//2; [(d.rectangle((i%3*w,i//3*h+h-31,(i%3+1)*w,(i//3+1)*h),fill=(36,40,39)),d.text((i%3*w+15,i//3*h+h-23),s,font=font,fill=(224,229,225))) for i,s in enumerate(labels)]; im.save(p)'\"
new=\"code='from PIL import Image,ImageDraw,ImageFont; import sys,json; p=sys.argv[1]; src=Image.open(p).convert(\\\"RGB\\\"); labels=json.loads(sys.argv[2]); font=ImageFont.truetype(\\\"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf\\\",14); w=src.width//3; h=src.height//2; im=Image.new(\\\"RGB\\\",(w*3,(h+31)*2),(36,40,39)); d=ImageDraw.Draw(im); [(im.paste(src.crop((i%3*w,i//3*h,(i%3+1)*w,(i//3+1)*h)),(i%3*w,i//3*(h+31))),d.text((i%3*w+15,i//3*(h+31)+h+8),s,font=font,fill=(224,229,225))) for i,s in enumerate(labels)]; im.save(p)'\"
assert old in s;s=s.replace(old,new)
# List only materials actually delivered; A7V road wheels are steel.
s=s.replace(\"Materials: Paint, TrackSteel, Rubber, Weapons, Rust, Interior, Lamps; damage adds Burnt and Scars;\", \"Materials: healthy Paint, TrackSteel, Weapons, Rust, Interior, Lamps; damage Paint, TrackSteel, Burnt, Scars;\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 945ms:
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exec
/bin/bash -lc 'ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py > /tmp/a7v-build5.log 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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 succeeded in 10226ms:
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exec
/bin/bash -lc "tail -4 /tmp/a7v-browser-install.log; python3 - <<'PY'
import json
j=json.load(open('nodes.json'));print(j['files']['a7v-tank.glb'].keys());print(j['files']['a7v-tank.glb']['bounds'])
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
|■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■                |  80% of 1.9 MiB
|■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■        |  90% of 1.9 MiB
|■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■| 100% of 1.9 MiB
FFmpeg (playwright ffmpeg v1013) downloaded to /tmp/a7v-runtime/browsers/ffmpeg-1013
dict_keys(['nodes', 'bounds', 'triangles'])
{'min': [-1.91698, -0.0, -4.0051], 'max': [1.91698, 3.3, 4.5682]}

codex
The latest visual review found the grille fit and finish improved enough to pass. I also corrected wheel numbering to run front-to-back, made the commander hatch open upward in the pivot proof, and moved grid labels below the images so they don’t cover the loose track.

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/bin/bash -lc "python3 - <<'PY'
p='/tmp/a7v-runtime/test.mjs';s=open(p).read().replace('executablePath:\"/snap/bin/chromium\",','');open(p,'w').write(s)
PY
PLAYWRIGHT_BROWSERS_PATH=/tmp/a7v-runtime/browsers node /tmp/a7v-runtime/test.mjs > /tmp/a7v-runtime-report.json 2>&1" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc "tail -4 /tmp/a7v-build5.log; sed -n '535,560p' build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
q=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun');q.parent=None;q.data.materials.clear();q.data.materials.append(MATS['Burnt'])
for p in q.data.polygons:p.material_index=0
wreckpieces.append(q)
bpy.ops.object.select_all(action='DESELECT')
for o in wreckpieces:o.select_set(True)
bpy.context.view_layer.objects.active=wreckpieces[0];bpy.ops.object.join();wreck=bpy.context.object;wreck.name='Wreck_Hull'
# Move origin to ground centre without touching the mesh placement.
mw=wreck.matrix_world.copy();wreck.data.transform(mw);wreck.matrix_world=Matrix.Identity(4)
mod=wreck.modifiers.new('Wreck simplification','DECIMATE');mod.ratio=.44;bpy.context.view_layer.objects.active=wreck;bpy.ops.object.modifier_apply(modifier=mod.name)
damage.append(wreck)
# Damage materials conform to five-bucket contract, shared Paint preserved.
for o in damage:
 if o.type!='MESH':continue
 for i,m in enumerate(o.data.materials):
  if m.name in ['Weapons','Rust']:o.data.materials[i]=MATS['TrackSteel']
  elif m.name in ['Interior','Lamps']:o.data.materials[i]=MATS['Burnt']
 prune(o)
print('DAMAGE_TRIANGLES',triangles(damage),flush=True)
export(damage,'a7v-tank-damage.glb')
# Metadata uses glTF axes, node pivots (world) and actual transformed bounds.
def xyz(v):return [round(v.x,5),round(v.z,5),round(-v.y,5)]
def manifest(obs):
 bpy.context.view_layer.update();nodes=[];points=[]
 for o in obs:
  nodes.append({'name':o.name,'position':xyz(o.matrix_world.translation),'parent':o.parent.name if o.parent else None,'triangles':sum(len(p.vertices)-2 for p in o.data.polygons) if o.type=='MESH' else 0})
  if o.type=='MESH':points.extend([o.matrix_world@Vector(p) for p in o.bound_box])

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/bin/bash -lc 'cat /tmp/a7v-runtime-report.json; tail -4 /tmp/a7v-build5.log; ls -l /tmp/a7v-runtime-*.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
{"report":{"ready":true,"bounds":{"min":[-1.9169814586639404,-9.313225746154785e-10,-4.005098640918732],"max":[1.9169814586639404,3.3000001907348633,4.568197965621948]},"drawCalls":153,"triangles":111232,"nodes":226,"textures":19},"errors":[]}
-rw-rw-r-- 1 claude-agent claude-agent 131129 Oct 11 16:48 /tmp/a7v-runtime-healthy.png
-rw-rw-r-- 1 claude-agent claude-agent 131872 Oct 11 16:48 /tmp/a7v-runtime-pivots.png
-rw-rw-r-- 1 claude-agent claude-agent 146826 Oct 11 16:48 /tmp/a7v-runtime-rear.png
-rw-rw-r-- 1 claude-agent claude-agent 152290 Oct 11 16:48 /tmp/a7v-runtime-wreck.png

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/bin/bash -lc 'tail -5 /tmp/a7v-build5.log; ls -lh build_a7v-tank.py a7v-tank*.glb nodes.json' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
-rw-r--r-- 1 claude-agent claude-agent 8.3M Oct 11 16:45 a7v-tank-damage.glb
-rw-r--r-- 1 claude-agent claude-agent 9.0M Oct 11 16:45 a7v-tank.glb
-rw-rw-r-- 1 claude-agent claude-agent  47K Oct 11 16:48 build_a7v-tank.py
-rw-r--r-- 1 claude-agent claude-agent  32K Oct 11 16:45 nodes.json

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/bin/bash -lc "python3 - <<'PY'
exec(open('/tmp/a7v-validate.py').read().split('for fn in ')[0].replace(\"root=Path(sys.argv[1]);reports={}\",\"root=Path('.');reports={}\"))
j,b=load(Path('a7v-tank.glb'))
for name in ['Hull','Track_L','Track_R','Gun','Barrel']:
 n=next(n for n in j['nodes'] if n['name']==name);v=np.concatenate([arr(j,b,p['attributes']['POSITION']) for p in j['meshes'][n['mesh']]['primitives']]);print(name,'local_bounds',v.min(0).round(5),v.max(0).round(5),'translation',n.get('translation'))
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 49ms:
Hull local_bounds [-1.51934  0.12301 -3.68394] [1.51934 3.295   3.68394] translation None
Track_L local_bounds [ 0.87411 -0.      -3.46701] [1.38948 0.907   3.46701] translation None
Track_R local_bounds [-1.38948 -0.      -3.46701] [-0.87411  0.907    3.46701] translation None
Gun local_bounds [-0.34863 -0.335   -0.16085] [0.34863 0.335   0.25736] translation [0, 1.9299999475479126, 3.506471872329712]
Barrel local_bounds [-0.10914 -0.108    0.02145] [0.10914 0.108   0.89016] translation [0, 0, 0.1715705394744873]

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/bin/bash -lc 'tail -2 /tmp/a7v-build5.log' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'cat BUILD_SCOPE.md; tail -3 /tmp/a7v-build5.log; du -h /tmp/a7v-runtime-report.json' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
A7V reconstruction from sheet.jpg; metres, Blender -Y forward / glTF +Z forward. Authoring began 11 October 2026 18:19 CEST; checkpoint 19:34 CEST.
Deliver healthy and turretless damage GLBs, single clean build script, node/paint/damage manifest, six-line notes, hero/side/clay and paint/state grids. No insignia.
Targets: 80–140k healthy triangles; <=110k damage; <=10 materials; <=12 MB each; maps <=1024, ORM <=512. Preserve individual moving pivots and removable parts.
Hero front-left three-quarter, orthographic side, grey clay; proof grids from exported GLBs. Up to three visual revisions.
Turretless exceptions: no Turret or Wreck_Turret; Turret_Damage is at ground origin and holds roof-cab scars. Eight MGs honor three per side plus two rear (MG_1..MG_8).
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Rubber
4.0K	/tmp/a7v-runtime-report.json

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codex
Both GLBs load successfully in the browser with no loader errors. The healthy asset is 111,230 triangles and 9.35 MB; the damage file is about 93,000 triangles and 8.70 MB. The final clean rebuild is running now, after which I’ll copy back and check the complete delivery set.

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/bin/bash -lc 'tail -5 /tmp/a7v-build5.log' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:576: DeprecationWarning: 'Material.use_nodes' is expected to be removed in Blender 6.0
  floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87
/root/fal-author/a7v-tank-v1/build_a7v-tank.py:578: DeprecationWarning: 'World.use_nodes' is expected to be removed in Blender 6.0
  S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5
00:23.492  render           | Saved: '/root/fal-author/a7v-tank-v1/final.png'

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/bin/bash -lc "cat > /tmp/a7v-contract-check.py <<'PY'
import json,struct,hashlib,io
from pathlib import Path
import numpy as np
from PIL import Image
root=Path('/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1')
exec(open('/tmp/a7v-validate.py').read().split('for fn in ')[0].replace(\"root=Path(sys.argv[1]);reports={}\",\"reports={}\"))
a,ab=load(root/'a7v-tank.glb');d,db=load(root/'a7v-tank-damage.glb');meta=json.load(open(root/'nodes.json'))
an={n['name']:n for n in a['nodes']};dn={n['name']:n for n in d['nodes']}
assert an['Gun']['children']==[a['nodes'].index(an['Barrel'])]
assert an['Barrel']['children']==[a['nodes'].index(an['Muzzle'])]
for side in 'LR':
 zs=[an[f'Wheel_{side}{i}']['translation'][2] for i in range(1,18)];assert zs==sorted(zs,reverse=True),zs
 n=an['Track_'+side];ps=np.concatenate([arr(a,ab,p['attributes']['POSITION']) for p in a['meshes'][n['mesh']]['primitives']]);assert abs(ps[:,1].min())<1e-6
 uv=np.concatenate([arr(a,ab,p['attributes']['TEXCOORD_0']) for p in a['meshes'][n['mesh']]['primitives']]);assert uv[:,1].max()-uv[:,1].min()<1.02
for n in ['Hull_Damage','Turret_Damage','Wreck_Hull']:assert dn[n].get('translation',[0,0,0])==[0,0,0]
assert len([n for n in dn if n.startswith('Dmg_Turret_')])>=3
am={n['name']:n for n in meta['files']['a7v-tank.glb']['nodes']};dm={n['name']:n for n in meta['files']['a7v-tank-damage.glb']['nodes']}
for item in meta['damage']['parts']:
 if item['twin']:assert am[item['part']]['position']==dm[item['twin']]['position']
assert am['Gun']['position']==dm['Gun_Broken']['position']
def paint_images(j,b):
 m=next(m for m in j['materials'] if m['name']=='Paint');textures=[m['pbrMetallicRoughness']['baseColorTexture']['index'],m['normalTexture']['index'],m['pbrMetallicRoughness']['metallicRoughnessTexture']['index']];out=[]
 for tid in textures:
  im=j['images'][j['textures'][tid]['source']];v=j['bufferViews'][im['bufferView']];data=b[v.get('byteOffset',0):v.get('byteOffset',0)+v['byteLength']];out.append(hashlib.sha256(data).hexdigest())
 return out
assert paint_images(a,ab)==paint_images(d,db)
assert all('camera' not in n for n in a['nodes']+d['nodes'])
print('PASS: hierarchy, wheel order, ground contact, loop UV range, damage root origins, twin pivots, shared Paint textures, no cameras.')
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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 succeeded in 174096ms:
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/bin/bash -lc 'tail -5 /tmp/a7v-build5.log' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
01:10.160  render           | Saved: '/root/fal-author/a7v-tank-v1/state-4.png'
01:11.770  render           | Saved: '/root/fal-author/a7v-tank-v1/state-5.png'
BUILD_COMPLETE

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read().replace('7.34/6.845','7.34/6.871').replace(\"('Seat_Commander',(0,0,3.0))\",\"('Seat_Commander',(0,0,3.30))\")
s=s.replace(\"comb.inputs[0].default_value=1;comb.inputs[2].default_value=metal;\", \"lk.new(sep.outputs[0],comb.inputs[0]);comb.inputs[2].default_value=metal;\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py > /tmp/a7v-build6.log 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/paints.png /tmp/a7v-paints-v4.png; scp gex44:/root/fal-author/a7v-tank-v1/clay.png /tmp/a7v-clay-v4.png; scp gex44:/root/fal-author/a7v-tank-v1/states.png /tmp/a7v-states-v4.png' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 3759ms:
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exec
/bin/bash -lc "tail -5 /tmp/a7v-build6.log; python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read()
s=s.replace(\"poses.append((s*(sx(zz)+.029),yy,zz))\",\"poses.append((s*(sx(zz)+.0265),yy,zz))\")
s=s.replace(\"[(s*.78,-.4,3.04),(s*.78,.34,3.02),(s*.78,.1,3.12)]\", \"[(s*(.83-(z-2.77)*(.1/.51)+.019626),y,z) for y,z in [(-.40,3.04),(.40,3.02),(.54,3.12)]]\")
s=s.replace(\"[(x,end*.75,2.87) for x in [-.5,0,.5]]\", \"[(x,end*.76469,2.87) for x in [-.5,0,.5]]\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
BAKED TrackSteel
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
Info: Baking map saved to internal image, save it externally or pack it
BAKED Rubber

codex
The final contract audit caught a small issue from thickening the armour: some cab hit marks sat inside the plate surface. I’m moving them just above it and replacing the dark backing beneath the removable side doors with a riveted inner panel, so the stripped state looks complete.

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/bin/bash -lc "python3 - <<'PY'
p='build_a7v-tank.py';s=open(p).read().replace(\"H.box((x-s*.016,yy,z),(.045,.67,1.02),'Interior',.025)\",\"H.box((x-s*.016,yy,z),(.045,.67,1.02),'Paint',.025)\\n for dy in [-.285,.285]:\\n  for dz in [-.44,.44]:H.rivet((x+s*.008,yy+dy,z+dz),(s,0,0),.018,'Weapons')\")
open(p,'w').write(s)
PY
python3 -m py_compile build_a7v-tank.py
tail -3 /tmp/a7v-build6.log" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
00:44.184  render           | Saved: '/root/fal-author/a7v-tank-v1/pivots.png'
00:45.374  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-0.png'
00:46.510  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-1.png'

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/bin/bash -lc 'tail -4 /tmp/a7v-build6.log' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
00:59.016  render           | Saved: '/root/fal-author/a7v-tank-v1/state-5.png'
BUILD_COMPLETE

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/bin/bash -lc 'scp build_a7v-tank.py gex44:/root/fal-author/a7v-tank-v1/build_a7v-tank.py' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'ssh gex44 /root/blender-spike/blender-5.2.0-linux-x64/blender -b --python-exit-code 1 --python /root/fal-author/a7v-tank-v1/build_a7v-tank.py > /tmp/a7v-build7.log 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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/bin/bash -lc 'tail -3 /tmp/a7v-build7.log; ls -la | head -20' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
00:44.971  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-0.png'
00:46.060  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-1.png'
00:47.418  render           | Saved: '/root/fal-author/a7v-tank-v1/paint-2.png'
total 18856
drwxrwxr-x  3 claude-agent claude-agent    4096 Oct 11 16:29 .
drwxrwxr-x 94 claude-agent claude-agent    4096 Oct 11 15:29 ..
-rw-rw-r--  1 claude-agent claude-agent     768 Oct 11 16:21 BUILD_SCOPE.md
-rw-rw-r--  1 claude-agent claude-agent   11529 Oct 11 16:19 PROMPT.txt
drwxrwxr-x  2 claude-agent claude-agent    4096 Oct 11 16:53 __pycache__
-rw-r--r--  1 claude-agent claude-agent 8695748 Oct 11 16:45 a7v-tank-damage.glb
-rw-r--r--  1 claude-agent claude-agent 9350548 Oct 11 16:45 a7v-tank.glb
-rw-rw-r--  1 claude-agent claude-agent  402930 Oct 11 16:54 astra.log
-rw-rw-r--  1 claude-agent claude-agent   48162 Oct 11 16:53 build_a7v-tank.py
-rw-rw-r--  1 claude-agent claude-agent    9233 Oct 11 15:20 job.json
-rw-r--r--  1 claude-agent claude-agent   32056 Oct 11 16:45 nodes.json
-rw-rw-r--  1 claude-agent claude-agent  711334 Oct 11 15:22 sheet.jpg
-rw-rw-r--  1 claude-agent claude-agent      43 Oct 11 15:22 sheet.log
-rw-rw-r--  1 claude-agent claude-agent     879 Oct 11 15:20 sheet_prompt.txt
-rw-rw-r--  1 claude-agent claude-agent      21 Oct 11 16:19 started.txt

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/bin/bash -lc 'tail -4 /tmp/a7v-build7.log; sha256sum build_a7v-tank.py; ssh gex44 sha256sum /root/fal-author/a7v-tank-v1/build_a7v-tank.py' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 503ms:
00:58.954  render           | Saved: '/root/fal-author/a7v-tank-v1/state-5.png'
BUILD_COMPLETE

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53d78174a910a3b03dc09b8933b1fd8fa92eac644779d3e4198f031af2e137a8  build_a7v-tank.py
53d78174a910a3b03dc09b8933b1fd8fa92eac644779d3e4198f031af2e137a8  /root/fal-author/a7v-tank-v1/build_a7v-tank.py

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/bin/bash -lc 'scp gex44:/root/fal-author/a7v-tank-v1/{a7v-tank.glb,a7v-tank-damage.glb,final.png,side.png,clay.png,paints.png,states.png,pivots.png,nodes.json,NOTES.md} .' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
codex
The clean build has finished. I’m checking the returned files against the rig and damage contracts, including matching replacement pivots, shared Paint textures, track ground contact and the final proof images.

 succeeded in 12182ms:
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exec
/bin/bash -lc 'python3 /tmp/a7v-validate.py "$PWD" > /tmp/a7v-validation-final.json
python3 /tmp/a7v-contract-check.py
python3 /home/claude-agent/.agents/skills/blender-game-assets/scripts/audit_glb.py a7v-tank.glb --strict > /tmp/a7v-audit-final.json
python3 /home/claude-agent/.agents/skills/blender-game-assets/scripts/audit_glb.py a7v-tank-damage.glb --strict > /tmp/a7v-damage-audit-final.json
cat NOTES.md' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 816ms:
PASS: hierarchy, wheel order, ground contact, loop UV range, damage root origins, twin pivots, shared Paint textures, no cameras.
WWI German A7V-style turretless heavy tank reconstructed from sheet.jpg; movable gun, eight MGs, hatches, wheels, removable fittings and aligned damage/wreck assets.
Triangles: healthy 111,422; damage 93,075; uncompressed GLB meshes with metre units.
Materials: healthy Paint, TrackSteel, Weapons, Rust, Interior, Lamps; damage Paint, TrackSteel, Burnt, Scars; Paint neutral baked texture × linear field-grey factor [0.19,0.22,0.19].
Textures: shared Cycles OptiX baked base/normal 1024px Paint, 512px others; ORM 512px; proof renders use re-imported GLBs.
Poly Haven CC0 ids: metal_plate, rusty_metal_03; https://polyhaven.com/license ; source maps downloaded from dl.polyhaven.org.
Differences: eight MGs follow written brief; no turret or Wreck_Turret (sixth state repeats turretless wreck); dimensions include protruding weapons beyond the armour footprint; weathering is shared tiling, not a unique historical vehicle.

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context compacted
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exec
/bin/bash -lc 'cat /tmp/a7v-validation-final.json' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
{
  "a7v-tank.glb": {
    "triangles": 111422,
    "degenerate_triangles": 0,
    "nodes": 93,
    "materials": [
      "Weapons",
      "Interior",
      "Paint",
      "TrackSteel",
      "Rust",
      "Lamps"
    ],
    "bytes": 10433316,
    "max_texture": 1024,
    "roots": [
      "Exhaust",
      "Fx_Ammo",
      "Fx_Engine",
      "Fx_Hatch",
      "Gun",
      "Hatch_Commander",
      "Hatch_Driver",
      "Hatch_Loader",
      "Hull",
      "Light_Head_L",
      "Light_Head_R",
      "MG_1",
      "MG_2",
      "MG_3",
      "MG_4",
      "MG_5",
      "MG_6",
      "MG_7",
      "MG_8",
      "Part_CabFlap_Front_L",
      "Part_CabFlap_Front_R",
      "Part_CabFlap_L",
      "Part_CabFlap_R",
      "Part_CabFlap_Rear_L",
      "Part_CabFlap_Rear_R",
      "Part_Door_L",
      "Part_Door_R",
      "Part_Exhaust_L",
      "Part_Exhaust_R",
      "Part_Fender_FL",
      "Part_Fender_FR",
      "Part_Fender_RL",
      "Part_Fender_RR",
      "Part_Grille_Front",
      "Part_Grille_Rear",
      "Part_Lamp_L",
      "Part_Lamp_R",
      "Part_Skirt_L1",
      "Part_Skirt_L2",
      "Part_Skirt_L3",
      "Part_Skirt_L4",
      "Part_Skirt_L5",
      "Part_Skirt_L6",
      "Part_Skirt_R1",
      "Part_Skirt_R2",
      "Part_Skirt_R3",
      "Part_Skirt_R4",
      "Part_Skirt_R5",
      "Part_Skirt_R6",
      "Part_Tow_Front_1",
      "Part_Tow_Front_-1",
      "Part_Tow_Rear_1",
      "Part_Tow_Rear_-1",
      "Seat_Commander",
      "Seat_Driver",
      "Track_L",
      "Track_R",
      "Wheel_L1",
      "Wheel_L2",
      "Wheel_L3",
      "Wheel_L4",
      "Wheel_L5",
      "Wheel_L6",
      "Wheel_L7",
      "Wheel_L8",
      "Wheel_L9",
      "Wheel_L10",
      "Wheel_L11",
      "Wheel_L12",
      "Wheel_L13",
      "Wheel_L14",
      "Wheel_L15",
      "Wheel_L16",
      "Wheel_L17",
      "Wheel_R1",
      "Wheel_R2",
      "Wheel_R3",
      "Wheel_R4",
      "Wheel_R5",
      "Wheel_R6",
      "Wheel_R7",
      "Wheel_R8",
      "Wheel_R9",
      "Wheel_R10",
      "Wheel_R11",
      "Wheel_R12",
      "Wheel_R13",
      "Wheel_R14",
      "Wheel_R15",
      "Wheel_R16",
      "Wheel_R17"
    ]
  },
  "a7v-tank-damage.glb": {
    "triangles": 93075,
    "degenerate_triangles": 0,
    "nodes": 29,
    "materials": [
      "Paint",
      "TrackSteel",
      "Burnt",
      "Scars"
    ],
    "bytes": 9408088,
    "max_texture": 1024,
    "roots": [
      "Hull_Damage",
      "Turret_Damage",
      "Wreck_Hull"
    ]
  }
}

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exec
/bin/bash -lc 'ls -lh a7v-tank.glb a7v-tank-damage.glb final.png side.png clay.png paints.png states.png nodes.json NOTES.md build_a7v-tank.py' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
-rw-r--r-- 1 claude-agent claude-agent  925 Oct 11 16:55 NOTES.md
-rw-r--r-- 1 claude-agent claude-agent 9.0M Oct 11 16:55 a7v-tank-damage.glb
-rw-r--r-- 1 claude-agent claude-agent  10M Oct 11 16:55 a7v-tank.glb
-rw-rw-r-- 1 claude-agent claude-agent  48K Oct 11 16:53 build_a7v-tank.py
-rw-r--r-- 1 claude-agent claude-agent 2.3M Oct 11 16:55 clay.png
-rw-r--r-- 1 claude-agent claude-agent 2.3M Oct 11 16:55 final.png
-rw-r--r-- 1 claude-agent claude-agent  32K Oct 11 16:55 nodes.json
-rw-r--r-- 1 claude-agent claude-agent 1.2M Oct 11 16:55 paints.png
-rw-r--r-- 1 claude-agent claude-agent 2.2M Oct 11 16:55 side.png
-rw-r--r-- 1 claude-agent claude-agent 921K Oct 11 16:55 states.png

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exec
/bin/bash -lc 'cp a7v-tank.glb a7v-tank-damage.glb /tmp/a7v-runtime/' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
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exec
/bin/bash -lc 'PLAYWRIGHT_BROWSERS_PATH=/tmp/a7v-runtime/browsers node /tmp/a7v-runtime/test.mjs > /tmp/a7v-runtime-report-final.json 2>&1' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
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 succeeded in 4768ms:
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exec
/bin/bash -lc 'cat /tmp/a7v-runtime-report-final.json' in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
{"report":{"ready":true,"bounds":{"min":[-1.9169814586639404,-9.313225746154785e-10,-3.989943265914917],"max":[1.9169814586639404,3.3000001907348633,4.550911903381348]},"drawCalls":153,"triangles":111424,"nodes":226,"textures":19},"errors":[]}

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exec
/bin/bash -lc "python3 - <<'PY'
import shutil
from pathlib import Path
p=Path('__pycache__')
if p.exists(): shutil.rmtree(p)
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
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mcp: forge/coord_note started
mcp: forge/coord_note (completed)
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mcp: forge/coord_release started
mcp: forge/coord_release (completed)
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mcp: forge/coord_release started
mcp: forge/coord_release (completed)
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 exited 143 in 611237ms:
Terminated

exec
/bin/bash -lc "python3 - <<'PY'
import os, signal
from pathlib import Path
for p in Path('/proc').iterdir():
 if p.name.isdigit():
  try:
   args=(p/'cmdline').read_bytes().split(b'\\0')
   if args[:6] == [b'python3', b'-m', b'http.server', b'18764', b'--directory', b'/tmp/a7v-runtime']:
    os.kill(int(p.name),signal.SIGTERM)
  except (FileNotFoundError,PermissionError,ProcessLookupError): pass
PY" in /home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1
 succeeded in 0ms:
codex
Delivered and validated:

- [Healthy GLB](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/a7v-tank.glb) — 111,422 triangles, 10.43 MB.
- [Damage GLB](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/a7v-tank-damage.glb) — 93,075 triangles, 9.41 MB.
- [Final render](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/final.png) · [Damage states](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/states.png) · [Paint variants](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/paints.png)

Reproducible build script, node manifest, notes and remaining proof renders are included. Rig pivots, damage alignment, texture limits and Three.js loading passed checks.
tokens used
257,866
Delivered and validated:

- [Healthy GLB](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/a7v-tank.glb) — 111,422 triangles, 10.43 MB.
- [Damage GLB](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/a7v-tank-damage.glb) — 93,075 triangles, 9.41 MB.
- [Final render](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/final.png) · [Damage states](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/states.png) · [Paint variants](/home/claude-agent/forge-build/forge-assets/jobs/a7v-tank-v1/paints.png)

Reproducible build script, node manifest, notes and remaining proof renders are included. Rig pivots, damage alignment, texture limits and Three.js loading passed checks.