Build and Fix

Incrementally fix Python type and lint errors:

1. Run checks:

   • mypy src/ (type checking)
   • ruff check . (linting)
   • pytest (tests)

2. Parse error output:

   • Group by file
   • Sort by severity

3. For each error:

   • Show error context (5 lines before/after)
   • Explain the issue
   • Propose fix
   • Apply fix
   • Re-run check
   • Verify error resolved

4. Stop if:

   • Fix introduces new errors
   • Same error persists after 3 attempts
   • User requests pause

5. Show summary:

   • Errors fixed
   • Errors remaining
   • New errors introduced

Fix one error at a time for safety!