"claude-haiku-5-5" isn't described by this version's model catalog; update Claude Code, or map it with behavesAs on a modelPicker row (or modelOverrides, if it is a provider id of a model this version knows). Until then auto-compact keeps this session within 200k tokens (the context window it assumes); if the model accepts more, append [1m] to the model name for 1M; CLAUDE_CODE_DISABLE_UNKNOWN_MODEL_WINDOW_ENFORCEMENT=1 restores the previous wait-for-the-API behavior.
[claude-code:unrecognized_model] {"model":"claude-haiku-5-5","query_source":"sdk"}