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docs(gates): the compiler burn-down after E32 S3, and the two idioms that keep it

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react-hooks/refs 245 -> 31 hits and 93 -> 29 skipped functions in the register and the eslint
comment. The canonical-patterns table gets the latest-value row (useEffectEvent; a handler or timer:
useLatest / useStableCallback, never a render-phase ref write) and the popover / scroll-fade row
(destructure the ref setter).
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peter
2026-10-03 23:18:33 +02:00
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@@ -28,7 +28,7 @@ them itself (`no-undef`, `no-redeclare`, `no-dupe-keys`, …), nor the formattin
| Scope | Narrowed | Why | Measured |
| --- | --- | --- | --- |
| src | `react-hooks/refs` — off | The one rule off while it has real hits. Its analysis IS the React Compiler's: every hit is a component the compiler skips (the popover engine's `getReferenceProps()` / `refs.setReference` passed during render, render-phase ref writes). Too many to fix in one sprint; until they are, `components/compilerCoverage.contract.test.ts` pins every skipped function (none may be added) and E32 S3+ burns them down to turn this on. | 245 hits; 93 skipped functions (E32 S1) |
| src | `react-hooks/refs` — off | The one rule off while it has real hits. Its analysis IS the React Compiler's: every hit is a component the compiler skips (the popover engine's `getReferenceProps()` / `refs.setReference` passed during render, render-phase ref writes). Too many to fix in one sprint; until they are, `components/compilerCoverage.contract.test.ts` pins every skipped function (none may be added) and E32 burns them down to turn this on. S3 fixed the popover engine and every render-phase ref write; what is left sits in PlexPlayer and PlayerModal, behind the try/finally and suppression skips. | 245 hits, 93 skipped functions (E32 S1) → 31 hits (3 of them in tests), 29 skipped (E32 S3) |
| src | `@typescript-eslint/no-unused-vars` — off | tsc owns it (`noUnusedLocals` + `noUnusedParameters` in every project), so a finding is reported once, by one tool. | — |
| src | `react-hooks/exhaustive-deps` — warn | Preset level; `--max-warnings 0` makes it fail. Every suppression names its invariant (`eslint-comments/require-description`). | 2 suppressions (both drop their whole function from the compiler — E32 S3) |
| src | `react-hooks/incompatible-library` — warn | Preset level; fails under `--max-warnings 0`. VirtualGrid (TanStack Virtual) is the one site, suppressed inline. | 1 |
@@ -96,7 +96,7 @@ Every project has `strict`, `noUncheckedIndexedAccess`, `noUnusedLocals`, `noUnu
| coverage | no threshold | Owner decision E32 D4: reported on both sides, never enforced. "Every regression test seen red" is the bar; a percentage invites tests written to move it. | frontend 80% / backend 78% of lines (E32 S1) |
| CVE gate | HIGH/CRITICAL with a fix available only | `--ignore-unfixed` + `--severity HIGH,CRITICAL`: a finding with no fix cannot be acted on by an upgrade; it shows in the scan output. A fixable one fails the publish, and the only way past it is `.trivyignore.yaml`. | 0 open (E32 S1) |
| npm audit (CI) | `--omit=dev --audit-level=high` | What ships to the browser, at high or above. The dev toolchain's advisories were burned down by hand in E32 S1 (18 → 0). | 0 |
| React Compiler | 93 functions it skips, pinned | `components/compilerCoverage.contract.test.ts` — the list may only shrink. End state: only VirtualGrid (TanStack Virtual, an IncompatibleLibrary) remains. | 93 (E32 S1) |
| React Compiler | the functions it skips, pinned | `components/compilerCoverage.contract.test.ts` — the list may only shrink. End state: only VirtualGrid (TanStack Virtual, an IncompatibleLibrary) remains. | 93 (E32 S1) → 29 (E32 S3) |
| size / complexity | today's offenders as ceilings | `src/lib/sourceSize.contract.test.ts`, `backend/tests/test_source_size.py`: listed files and functions may not grow, nothing new may cross the limit, an entry back under it must be deleted. | files >800 lines: 13 FE / 11 BE; functions over the limit: 64 FE / 32 BE |
## Accepted findings