fix UnboundLocalError in function_target

[gabriel-eidelman]

Why are these changes needed?

Fix UnboundLocalError

Note: will add tests

Checks

• I've included any doc changes needed for https://docs.ag2.ai/. See https://docs.ag2.ai/latest/docs/contributor-guide/documentation/ to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[joggrbot]

📝 Documentation Analysis

All docs are up to date! 🎉

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✅ Latest commit analyzed: 5805892 | Powered by Joggr

[claude]

Code Review

Thank you for fixing this UnboundLocalError! I've reviewed the changes and have the following feedback:

✅ Positive Aspects

1. Correct Bug Fix: The fix properly addresses the UnboundLocalError that occurs when the for-loop completes without finding a matching agent.
2. Good Use of for-else: Using Python's for-else construct is the idiomatic way to handle this scenario.
3. Clear Error Message: The ValueError message clearly indicates what went wrong.

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🐛 Issues Found

1. Typo in Error Message (autogen/agentchat/group/targets/function_target.py:70)

The error message contains a typo: "No agent found with in the group chat"

Should be: "No agent found within the group chat" or "No agent found in the group chat"

Suggested fix:

raise ValueError(f"No agent found in the group chat matching the target agent name {next_target}.")

2. Missing Test Coverage

As noted in the PR description, tests are still needed. The fix changes the behavior when an agent is not found from raising an UnboundLocalError to raising a ValueError with a descriptive message. This should be covered by:

• A test case that verifies the ValueError is raised when construct_broadcast_messages_list is called with an AgentTarget or AgentNameTarget pointing to a non-existent agent
• A test case that verifies the happy path (agent found) still works correctly

Example test structure:

def test_construct_broadcast_messages_list_agent_not_found():
    """Test that ValueError is raised when target agent is not in group chat."""
    # Setup: Create group chat without the target agent
    # Call: construct_broadcast_messages_list with non-existent agent
    # Assert: ValueError is raised with appropriate message

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📋 Additional Recommendations

1. Code Quality: The fix is clean and follows Python best practices.
2. Performance: No performance concerns - the fix is minimal and efficient.
3. Security: No security concerns identified.
4. Documentation: The function docstring at line 61 could be enhanced to document the ValueError that can be raised, but this is a minor improvement.

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✔️ Approval Status

Once the typo is fixed and tests are added, this PR will be ready to merge. The core logic is sound and addresses the bug correctly.

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📝 Action Items

• Fix typo in error message (line 70)
• Add test coverage for the error case (agent not found)
• Add test coverage for the success case (agent found)

Great work on identifying and fixing this issue! 🎉

[randombet]

LGTM

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
autogen/agentchat/group/targets/function_target.py	0.00%	2 Missing ⚠️

Files with missing lines	Coverage Δ
autogen/agentchat/group/targets/function_target.py	37.77% <0.00%> (-0.43%)	⬇️

... and 20 files with indirect coverage changes

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