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.
E32 S4 — the burn-down from 29 skipped functions to 1:
- try/finally (26 sites): the cleanup runs after a try/catch; steps that return early moved into
their own function (push, the setup wizard's next, the share page's unlock).
- A conditional, loop or optional call inside a try skips the function too, and react-hooks/todo
does not see it: the value is computed before the try, or the try lives in a module-level helper
(config writes, clip queueing, clipboard, frame counts, seekable end, YouTube player times).
- The two exhaustive-deps suppressions are gone. useYtProgress takes its per-item snapshot through
one effect event, read once when the player is built; PlexPlayer's unmount relies on the
leaving-the-item cleanup for the generation bump it duplicated.
- What the skips hid: PlexPlayer's 17 render-phase ref writes (useLatest), its tracks popover alias,
the loadSession self-reference (declared early, set after commit); PlayerModal's session-position
read during render (now where the player starts), navRef/modeRef writes, and a description helper
that ran a ref-carrying callback during render (now PlayerDescription); SavedViewsProvider's
latest-cfg ref, and its setState in the seed effect (preferSticky now prefers the starred default
among same-filter views, so the seed needs no sticky write — test seen red on the old helper).
- A store's hook was called `use()`, which the compiler does not know as a hook: inside the newly
compiled usePlaylistActions it was memoized, ran on the first render alone, and the playlist rail
threw "rendered fewer hooks" on its second render. Renamed to `useValue()` everywhere; the old
contract test claimed the call was safe inside any `use…` function, which was false — replaced by
a render test that is red under the old name.
- PlexPlayer's palette ref was written and never read since the Backspace guard moved to the layer
stack: removed.
react-hooks/refs is back at error with no exception. The ratchet lists only VirtualGrid
(IncompatibleLibrary) and pins both players as compiled. No size or complexity ceiling was raised.
E32 S3. The compiler skipped 93 functions; it now skips 29 (try/finally shapes, two suppressions,
VirtualGrid). react-hooks/refs hits 245 -> 31.
- Popover engine: `ref={pop.refs.setReference}` made the compiler treat the whole popover handle as
a ref, so every component holding one was skipped (21 call sites, the engine and its surface
among them). The setter is destructured now; the same for useScrollFade and useReturnFocus.
- Render-phase `ref.current = x` writes moved to `useEffectEvent` where only effects read them,
else to the new `useLatest` (written in a layout effect) / `useStableCallback`.
- FocusSafeButton (under every Button) read the focused element during render; it reads it through
useSyncExternalStore, which React asks on every render instead of a cached memo.
Bugs this surfaced, fixed:
- Combobox: a chip could keep showing its raw id. The label cache was a ref an effect filled after
the render that needed it; it is state merged during render now (test seen RED).
- useUndoable rendered from a ref plus a forced re-render; compiled, that memoizes a stale value.
The history is state now, mirrored in a ref for the stable callbacks.
- ConfigPanel and the saved-views editor re-seeded their drafts in an effect, painting the stale
draft for a frame; both adjust during render against the remembered key.
- Toaster's handover is written after commit instead of during render; a new test pins that the
inherited set is taken once, at the takeover (seen RED on a per-render re-read).
- IssueComposer mutated a ref prop as a one-shot focus token; it is plain state.
- PlexBrowse wrote its info-scroll memory from an effect declared before the ref, past its own
"one writer" rule; the writer comes first now and the effect goes through it.
The compiler ratchet drops to the measured 29 and now also requires FocusSafeButton and the popover
engine to compile.
compilerCoverage.contract.test.ts used to check two files. It now runs the
real compiler over all of src (minus tests) and holds the exact set it skips
today, file -> function -> category: 93 functions. A new skip or a category
change is red, and so is a listed skip that has gone, so the list only
shrinks. Channels and DataTable must also show up as compiled, so a harness
that compiled nothing cannot pass.
Measured against the audit's scan: no function this sprint touched started
to skip. PlexPersonView and useOverlayOrder now compile.
reactPlugin.ts claimed the compiler's rules were linted, which was false
while react-hooks/refs was off. That comment and the refs block in
eslint.config.js now say what holds the line and why refs is still off:
245 real hits, pinned by the ratchet, burned down from S3.
The React Compiler silently skipped Channels and DataTable (a ref written
during render; the refs lint is off), and even once compiled it dropped the
memo of the rows and columns (they reach filterRows/optionsFromColumns past
the page's hooks) and the columns read the open row. Every open, close and
reposition of the right-click menu rebuilt the whole table: on "All" rows
~0.9 s to open and ~0.6 s to close (dev). Now: effect events instead of the
render-written refs, explicit memos for rows, columns and their inputs, a
module-scope keyOf, and the open row reaches its "…" through a small store.
Measured on 397 rows (dev): ~75 ms to open, ~35 ms to close.
A contract test runs the real compiler over both files and fails on any
skipped function. The dropped memos have no automated guard: they need
the full page rendered with its providers; the measurement above is the
evidence.
peter