[WIP] Fix mypy errors in gamma branch CI

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

CI is failing on both gamma and main branches in SL-Mar/quantcoder-cli.

1. gamma branch failures (mypy):

• CI run: https://github.com/SL-Mar/quantcoder-cli/actions/runs/21342772949 (head sha a3a1dd6…)
• 82 mypy errors across multiple files. Patterns:
  • execute signatures in tools/agents not matching base Tool/BaseAgent.execute(**kwargs) (file_tools.py, code_tools.py, article_tools.py, agents/*).
  • Missing/invalid type annotations (parallel_executor.py, core/processor.py, library/coverage.py, chat.py, library/builder.py).
  • Functions returning Any or missing returns (llm/providers.py, core/llm.py, mcp/quantconnect_mcp.py, evolver/evaluator.py, agents/*.py).
  • Missing type stubs for requests (install types-requests) affecting article_tools.py, autonomous/pipeline.py, evolver/evaluator.py.
  • Invalid type usage (any -> typing.Any) and Optional defaults flagged (no implicit optional) in strategy_agent, etc.

Acceptance for gamma:

• mypy passes in CI (no type errors).
• Tool/Agent execute overrides align with base signatures (or base classes updated accordingly) and annotated.
• Add required stub deps (types-requests) and fix annotation/return issues listed above.

2. main branch failures (pytest):

• CI run: https://github.com/SL-Mar/quantcoder-cli/actions/runs/21343914347 (head sha eebfe96…)
• Failures include:
  • Missing deps: ModuleNotFoundError: anthropic, mistralai in tests/test_llm_providers.py.
  • Async tests failing: “async def functions are not natively supported” across llm provider and MCP tests. Need pytest-asyncio (or anyio) configured/enabled so async tests run.
  • tests/test_llm.py: LLMHandler missing _extract_code_from_response (AttributeError).
  • tests/test_evolver.py::test_get_summary: ValueError invalid format specifier in EvolutionState.get_summary f-string (fitness formatting when None).
  • tests/test_tools.py::TestValidateCodeTool: execute not accepting file_path (TypeError).
  • tests/test_tools.py::TestSearchArticlesTool::test_search_no_results: ToolResult.success False; adjust behavior or test to return success True/empty data.

Acceptance for main:

• All tests pass (pytest green) with async plugin in place.
• Required deps added to dev/test (anthropic, mistralai, pytest-asyncio/anyio as needed).
• LLMHandler gains _extract_code_from_response (or tests updated) per expectations.
• EvolutionState.get_summary formatting fixed for missing fitness.
• ValidateCodeTool.execute accepts file_path and handles missing file gracefully.
• SearchArticlesTool returns success True with empty data (or update test accordingly).

General:

• Keep LICENSE as Apache 2.0 (don’t change).
• Update requirements/pyproject as needed for added dev deps.
• Ensure CI passes on both branches.

Deliverables:

• Code changes with tests passing locally (pytest) and type checks (mypy) green for gamma scope.
• Summary of changes and CI results in PR description.

This pull request was created from Copilot chat.

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