OpenRouter-hosted thinking models (Claude Sonnet 4.5, Opus 4.5, Gemini
3 Pro Preview) can return an empty textual response when forced to
produce a final answer after max_iter is reached, because the turn was
spent on reasoning tokens. The prior behavior raised a raw ValueError,
crashing the entire crew execution.
handle_max_iterations_exceeded now returns a graceful AgentFinish using
the last partial text (when available) or a descriptive fallback
message. Non-string responses are coerced to strings before being
passed to format_answer to avoid downstream TypeErrors.
Co-Authored-By: João <joao@crewai.com>
b065a45dda