Fix: Hierarchical delegation coworker bug (Issue #1823)

[devin-ai-integration]

Fix hierarchical delegation coworker bug (Issue #1823)

This PR fixes an issue where the "Delegate work to coworker" tool fails to recognize valid agent targets during hierarchical task execution. The changes ensure proper tool updates during async execution and maintain correct delegation capabilities between manager and agents.

Changes:

• Update _prepare_tools and _update_manager_tools to handle async execution in hierarchical mode
• Add test cases to verify delegation tool behavior
• Ensure proper tool updates during async task execution

Testing:

• Added new test file test_hierarchical_delegation.py with comprehensive test cases
• Verified existing tests pass
• Manually tested delegation functionality

Fixes #1823

Link to Devin run: https://app.devin.ai/sessions/7d8fdbb6c0cf49dabeacead8211bea3f

[devin-ai-integration]

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[joaomdmoura]

Disclaimer: This review was made by a crew of AI Agents.

Code Review Comment for PR #1825

Summary

This pull request introduces significant improvements to the delegation mechanism in hierarchical mode, along with appropriate test cases to ensure the functionality works as intended. While the changes are impactful, I would like to highlight some areas for improvement to enhance code quality and maintainability.

Code Quality Findings

1. Code Duplication

There exists duplication in the delegation logic between _prepare_tools and _update_manager_tools. To streamline the codebase, I propose creating a dedicated method for retrieving delegation agents.

# Recommended Refactor:
def _get_delegation_agents(self, agent: BaseAgent, task: Task = None) -> List[BaseAgent]:
    ...

2. Simplification of Complex Logic

The method _prepare_tools has nested conditionals that complicate readability. Consider breaking down responsibilities into smaller methods to enhance clarity.

# Recommended Simplification:
def _prepare_tools(self, agent: BaseAgent, task: Task, tools: List[Tool]) -> List[Tool]:
    ...

3. Enhanced Error Handling

Improving error messages and validations is essential. For instance, the _validate_hierarchical_setup needs to convey clearer information if configurations are incorrect.

def _validate_hierarchical_setup(self):
    ...

Testing Improvements

1. Edge Case Testing: The test suite covers hierarchical delegation well, but it should also include edge cases such as empty agent lists.

   def test_hierarchical_delegation_edge_cases():
       ...

2. Async Task Testing: Asynchronous tasks should have dedicated tests to catch any potential issues in delegation behavior.

   def test_async_task_delegation():
       ...

General Recommendations

• Implement a Tool Factory pattern for better tool management.
• Consistently apply type hints throughout the codebase.
• Incorporate logging for improved debugging and monitoring.
• Document the hierarchical process and delegation rules clearly.

Historical Context

While I could not access related pull requests or historical changes for further insights, I recommend reviewing relevant discussions and decisions made in previous PRs that cover delegation logic and hierarchical processing. Doing so may provide valuable context for certain design choices and enhancements.

Conclusion

With these changes and suggested improvements, the code will not only be more maintainable and readable but will also ensure a more robust implementation of the hierarchical delegation system. I look forward to seeing the updates and further enhancements in future iterations.

[devin-ai-integration]

Closing this PR as the delegation bug fix is already present in the main branch. Recent improvements to agent name matching and delegation tool availability have resolved the issue. The main branch now includes:

1. Case-insensitive and whitespace-tolerant agent name matching
2. Proper delegation tool availability in hierarchical mode
3. Comprehensive error handling and logging

All tests are passing and the functionality has been verified. Issue #1823 will be closed as resolved.