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- Add 5 new Agent configuration fields: - compact_mode: Enable compact prompt mode to reduce context size - tools_prompt_strategy: Choose between 'full' or 'names_only' for tools - proactive_context_trimming: Enable proactive message trimming - memory_max_chars: Cap memory context length - knowledge_max_chars: Cap knowledge context length - Implement compact prompt mode in utilities/prompts.py - Caps role to 100 chars, goal to 150 chars - Omits backstory entirely in compact mode - Implement tools_prompt_strategy in Agent.create_agent_executor - 'names_only' uses get_tool_names for minimal tool descriptions - 'full' uses render_text_description_and_args (default) - Implement memory/knowledge size bounds in Agent.execute_task - Truncates memory and knowledge contexts when limits are set - Add trim_messages_structurally helper in agent_utils.py - Structural trimming without LLM calls - Keeps system messages and last N message pairs - Integrate proactive trimming in CrewAgentExecutor._invoke_loop - Trims messages before each LLM call when enabled - Update LangGraphAdapter and OpenAIAdapter to honor compact_mode - Compacts role/goal/backstory in system prompts - Add comprehensive tests for all new features: - test_prompts_compact_mode.py - test_memory_knowledge_truncation.py - test_tools_prompt_strategy.py - test_proactive_context_trimming.py All changes are opt-in with conservative defaults to maintain backward compatibility. Fixes #3912 Co-Authored-By: João <joao@crewai.com>