When agents delegate work to other agents, structured constraints
(domain scope, quality requirements, temporal/geographic limits) were
silently lost because only the natural language task description was
passed to the delegated task.
Changes:
- Add 'constraints' field to Task model (list[str], default empty)
- Include constraints in Task.prompt() output when present
- Add 'original_task' field to BaseAgentTool to track the source task
- Propagate constraints from original task to delegated task in
BaseAgentTool._execute() - both as structured field and in context
- Update AgentTools, Agent.get_delegation_tools(), and Crew delegation
methods to thread the task through the delegation chain
- Update OpenAI and LangGraph adapter get_delegation_tools signatures
- Add info logging when constraints are propagated
- All changes are backward compatible (task parameter is optional)
Co-Authored-By: João <joao@crewai.com>
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