35 mypy strict errors — README claims strict-clean

[AndresL230]

Summary

README.md and CLAUDE.md both advertise mypy --strict cleanliness. mypy recost/ reports 35 errors across 6 files.

Highlights:

• _interceptor.py — latency_ms: int parameter receives a float from (time.perf_counter() - start) * 1000.
• frameworks/flask.py:33 — self._handle = None is inferred as None; reassignment to RecostHandle in init_app fails.
• Stale # type: ignore comments flagged as unused.

Fix

Decide on the actual mypy contract. Either run mypy in CI and fix the 35 errors, or drop the strict-clean claim from the README. The first option is correct.

Files

• recost/_interceptor.py
• recost/frameworks/flask.py
• others
• README.md
• pyproject.toml (mypy config)
• CI workflow

Priority

P0 — the public posture is false; type errors prevent reliable refactoring.