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- pyproject.toml: add mypy to dev deps, [tool.mypy] with strict = true, override to relax tests - ci.yml: add 'Type check' step running mypy src/ on all 3 Python versions - server.py: tighten dict annotations to dict[str, object] to pass strict mode Locally: mypy src/ → 'Success: no issues found in 5 source files'. pytest + ruff still green.
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Summary
Adds static type checking to the Python starter — closes the 2026-04-23 audit finding that type hints were present but never verified.
pyproject.toml:mypyin[project.optional-dependencies].dev,[tool.mypy]withstrict = true,warn_unused_ignores,warn_redundant_casts,warn_unreachable,show_error_codes. Tests exempted fromdisallow_untyped_defs..github/workflows/ci.yml: newType checkstep runsmypy src/across Python 3.11 / 3.12 / 3.13.src/my_mcp_server/server.py: tightendict→dict[str, object]onok()/err()helpers (strict mode requires generic parameters).Test plan
mypy src/→Success: no issues found in 5 source filespytest→ 2 passed;ruff check .→ all passed