The code cited its plan instead of saying why: `E28 review J4`, `(R6 S3b)`, `S1 justified…`,
`deep-review round 5`. That plan lives in the private ops repo, so for every reader of this one the
citation was noise, and a sentence whose subject was the plan step ("round 2 showed…") hid its
lesson behind an id. Each one is gone and the "why" kept: a bare citation is deleted, a sentence
carrying a lesson is reworded around it ("a later attempt showed…").
Measured (`scripts/audit_metrics.py`, product code): 652 lines in 270 files carried an epic code by
the definition the next commit holds (507 / 241 by the old, two-digit-only one) -> 0. Across all
code, tests, scripts and configs: ~1100 epic-code lines plus ~320 sprint/round ids.
Behaviour unchanged, checked mechanically: every changed .py file has the same AST once docstrings
are blanked; css/sh/toml/yml/json files are identical once comments are stripped; the only
non-comment changes in TS/JS are test titles, one description string in a contract table, and five
ESLint messages, whose text is all the gates snapshot diff holds. Not touched: Markdown (docs and
the changelog keep their history), Alembic migrations, TV episode notation (`S2 · E5`), DESIGN.md
ids (`C1`, `B4`, `S3h`), tracker ids (`SEC-16`, `DX-17`).
One stale claim fixed on the way: test_hls_reaper's docstring said the player checkpoints "every
10 s whether or not it is playing", which plex/stream.py calls wrong; it now says what the code does.
The backend had zero tests. This adds 33, all pure (no DB, no network), plus the
harness to run them in the gate:
- backend/Dockerfile.test: the app's deps + pinned pytest/ruff, code bind-mounted at
run time so it always tests the working tree. Isolated from the prod Dockerfile, so
the published image never carries test tooling.
- requirements-dev.txt: pytest==8.4.2, ruff==0.15.21 (the version the gate already
runs) — the backend lane is now pinned, not just host-global.
- tests: normalize_title (de-shout, hashtag strip, emoji drop, trilingual letters
survive); storage sanitize/rel_path/download_filename and the safe_abs_path
traversal guard (../ and absolute-path escapes rejected — verified by mutation);
links HMAC grants (round-trip, wrong-token, tampered sig/exp, expiry) + is_expired;
a DB-free app-assembly smoke (every router wires up, OpenAPI generates).
DB-backed router smoke (auth/feed/downloads) needs a test Postgres + migrations —
deferred. useCardPager needs hook-test infra (jsdom/renderHook) — deferred.
peter