When LLMs output 'Action: None' (or variations like 'Action: N/A'),
the parser now correctly treats this as a signal for a direct response
instead of raising an OutputParserError.
This fixes issue #4186 where the parser would fail and leak internal
'Thought:' text to users instead of providing a clean response.
Changes:
- Add ACTION_NONE_REGEX constant to match non-action values
- Update parse() to detect and handle Action: None patterns
- Convert Action: None to AgentFinish with the thought as output
- Add comprehensive tests for all variations
Closes#4186
Co-Authored-By: João <joao@crewai.com>
37b75aeb6a