* no need post tool reflection on native tools
* refactor: update prompt generation to prevent thought leakage
- Modified the prompt structure to ensure agents without tools use a simplified format, avoiding ReAct instructions.
- Introduced a new 'task_no_tools' slice for agents lacking tools, ensuring clean output without Thought: prefixes.
- Enhanced test coverage to verify that prompts do not encourage thought leakage, ensuring outputs remain focused and direct.
- Added integration tests to validate that real LLM calls produce clean outputs without internal reasoning artifacts.
* dont forget the cassettes
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