feat(oxlint-plugin): native TypeScript ports of OXC react/* + jsx-a11y/* + react-hooks + you-might-not-need-an-effect (108+ rules)#273
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- packages/core/src/runners/oxlint/config.ts: trim comments that
restated 'what' to leave only the 'why' note about `customRulesOnly`
preserving pre-port behavior. AGENTS.md mandates 'never comment
unless absolutely necessary'.
- scripts/extract-react-hooks-tests.mjs: rename unused proxy-handler
parameter `target` → `_target` and `key` → `propertyKey` for
descriptive naming.
- __upstream-fixtures__/run-upstream-parity.ts:
- lift the magic `70` truncation bound out as
`MAX_LABEL_LENGTH_CHARS` constant per AGENTS.md
'magic numbers in named constants' rule
- dedupe the near-identical valid/invalid case loops into a single
`registerCase` helper. AGENTS.md: 'don't repeat yourself'
- src/plugin/utils/wrap-with-semantic-context.ts:
- hoist `buildFallbackScopes`, `FALLBACK_CFG`, and `findProgramRoot`
to module scope so each rule wrapper invocation doesn't redeclare
them
- drop the `ensureProgramRoot` indirection (it just returned a
closed-over variable)
- replace the `return { ...rule, create }` block-bodied wrapper with
an arrow-returning-expression form per AGENTS.md
'arrow functions over function declarations' (and consistent with
the rest of the codebase's wrapper pattern)
Verified: pnpm format/lint/typecheck/test all green (5,696 passed,
327 skipped, 0 lint warnings, 0 type errors).
Co-authored-by: Aiden Bai <aidenybai@users.noreply.github.com>
Run formatter on 7 unformatted files to fix CI format:check. Remove dead O(n) fallback in resolveRuleSeverityOverride — getEquivalentRuleKeys already covers all alias matches. Co-authored-by: Cursor <cursoragent@cursor.com>
After porting the 100 OXC react/* + jsx-a11y/* rules natively in PR #273, an eval across 100 real repos showed the PR's default config emits +162k diagnostics vs main. Manually validating samples per rule revealed most are unactionable noise on modern React codebases. This commit tunes the defaults — adding `defaultEnabled` and `disabledBy` opt-out hooks to the rule schema — and reduces the eval delta to +34k (~79% reduction). No genuine bugs are silenced. Schema additions (`oxlint-plugin-react-doctor/src/plugin/utils/rule.ts`): - `defaultEnabled?: boolean` — when `false`, the rule ships in the plugin but is OFF by default; users opt in via `severityControls.rules["react-doctor/<id>"]`. For ports whose upstream defaults are widely-disabled in real projects. - `disabledBy?: ReadonlyArray<string>` — inverse of `requires`. If any listed capability token is present, the rule is skipped. Lets us disable perf rules that React Compiler makes redundant. Rule-level changes: - `react-in-jsx-scope`: `defaultEnabled: false`. Obsolete for any project on React 17+ with the automatic JSX runtime (`jsx: react-jsx`) — which is every modern React tool. 89,715 hits on the eval corpus, ~100% FP rate (all sampled projects were React 17+). - `forbid-component-props`: `defaultEnabled: false`. The upstream default `["className", "style"]` forbid list flags the canonical Tailwind/shadcn/Radix customization pattern. 7,450 hits, ~100% FP. - `jsx-props-no-spreading`: `defaultEnabled: false`. `{...props}` is the canonical forwardRef / shadcn / headless-UI composition pattern. 1,908 hits, ~95% FP. - `jsx-no-new-{object,array,function,jsx}-as-prop`: `disabledBy: ["react-compiler"]`. RC auto-memoizes prop allocations, so the perf footgun these rules guard against doesn't exist on RC-enabled projects. (Detection is unchanged — uses the existing `detectReactCompiler` pipeline that checks `babel-plugin-react-compiler` / `react-compiler-runtime` deps and `reactCompiler: true` in Next/Babel/Vite/Expo configs.) - `jsx-no-new-object-as-prop`: additionally exempt `style` and `dangerouslySetInnerHTML` props. Both are React-mandated object-shape APIs (`dangerouslySetInnerHTML` MUST be `{__html: ...}`) and the perf footgun is unactionable on non-memoized components. - `jsx-max-depth`: raise default `max` from 2 to 10. OXC's default is far too strict — a routine shadcn Card already exceeds it (`<Card><CardHeader><CardTitle/></CardHeader></Card>` = depth 3). Eval went from 23,990 hits to 110. - `only-export-components`: severity warn → error, but tighten the file-name gate to ONLY fire on `.tsx`/`.jsx` (and `.js` when `checkJS: true`) — pure `.ts` files don't participate in Fast Refresh and can't break it. Also default `allowConstantExport: true` (matches the recommended config in `eslint-plugin-react-refresh` for Vite). Down from 4,766 hits to 1,606, all genuine FR-breakers. Config wiring (`@react-doctor/core`): - `shouldEnableRule` now accepts `disabledBy` and short-circuits if any listed capability is present in the project. - `createOxlintConfig` skips rules with `defaultEnabled === false` unless an explicit `severityControls.rules` entry turns them on. This preserves opt-in escape hatches without bloating the default diagnostic surface. Tests: - 6 OXC fixture cases now documented as intentional divergences in `react-builtins/__fixtures__/oxc-divergences.ts` (1 jsx-max-depth fixture depth=4 now passes under max=10; 1 jsx-no-new-object-as-prop fixture flagging `style` now passes; 4 only-export-components fixtures flagging constant exports now pass under allowConstantExport). - Two new regression tests in `scan-resilience.test.ts` lock in: (1) the four RC-gated perf rules disappear when `hasReactCompiler` is true and re-appear when false; (2) the three default-disabled rules are absent from the default config and re-appear when explicitly enabled via `severityControls`. - Full suite green: 6,021 pass + 6 documented skips in oxlint-plugin, 1,386 pass + 1 upstream `todo` in react-doctor. Eval verification on 100 repos (using react-doctor-evals local runner): - Before: +162,277 new diagnostics vs main, ~64% likely-FP. - After: +34,306 new diagnostics. The remaining ~21k come from the four RC-gated perf rules firing on the eval corpus (which is almost entirely non-RC projects) — on a React Compiler project they too would disappear, leaving ~13k mostly stylistic / genuine bug findings. Zero behavioral regressions: no rule on main lost any findings. Co-authored-by: Cursor <cursoragent@cursor.com>
…remaining FPs Continuing the eval-driven cleanup of PR #273's default ruleset. After the first round of changes brought the eval delta from +162k to +34k, I sampled 8 diagnostics per rule from the corpus and validated each against the source. This commit fixes the remaining clusters. The 100-repo eval delta is now +29,776 (an 82% reduction from the +162k pre-fix baseline). For React Compiler projects, the four RC-gated perf rules also drop, leaving ~8,500 — almost all of which are either genuine bug-catchers or the `no-multi-comp` warning the user explicitly chose to keep enabled. Real bugs in rule impl (Tier 1): - `is-create-element-call`: previously only excluded immediate `document.createElement(...)`. A `dom.window.document.createElement(...)` chain (jsdom-based test harness pattern) was misidentified as a React `createElement` call, causing `button-has-type` to flag the DOM API. Fixed by walking the MemberExpression chain looking for any `document` segment. - `no-unstable-nested-components`: the enclosing-class check (and the inner Class{Declaration,Expression} handlers) only verified the class name was PascalCase, so tldraw's `class NewRoot extends RootState` was flagged as a nested React component candidate. Added `isReactClassComponent` helper that requires either `extends React.Component`/`Component`/`PureComponent` or JSX/createElement in any method body. - `no-this-in-sfc`: the `looksLikeFunctionComponent` walker climbed past object-property boundaries until it hit a PascalCase VariableDeclarator. For `const ResizableImage = TiptapImage.extend({ addAttributes() { ...this... } })`, it incorrectly attributed the inner `addAttributes` method to the outer `ResizableImage` and flagged `this` as misused-in-SFC. Fixed by stopping at Property boundaries — an object method is its own scope owner, not a child of the enclosing variable's name. - `jsx-pascal-case`: default `allowLeadingUnderscore: false` flagged `<_ContextMenu.Root>` — the canonical Radix UI / Headless UI / React Aria import-alias pattern. Defaulted to `true`; users who want strict underscore enforcement can opt back in. Defaults too aggressive (Tier 2): - `no-unstable-nested-components`: default `allowAsProps: true`. Render-prop components (`<Trans bold={(el) => <b>{el}</b>}/>`, tldraw's `components={{HelperButtons: () => ...}}`, twenty's `<Button Icon={() => <Loader/>}/>`) are canonical React. The 7/8 pre-fix samples in the eval were all this pattern. - `control-has-associated-label`: * Added `canvas` to default `ignoreElements` — a canvas is a drawing surface, not a labellable form control. Real labelling (when needed) uses `aria-label` and would pass the existing check. * Skip test/spec/cy/story files entirely — they exercise component shapes, not user flows. * Raised default `depth` from 2 to 5. Real buttons routinely nest visible text 3-4 levels inside flex/wrapper divs (e.g. react-scan's `<button><div className="flex"><div className="flex">What changed?</div></div></button>` at depth 5 was reported as label-less under the old default). Pure stylistic rules disabled by default (Tier 3): The following rules were validated against the corpus and confirmed to be formatter/opinion territory with zero bug-catching value. They ship in the plugin (importable, configurable) but are now `defaultEnabled: false`. Users who want strict stylistic enforcement opt in via `severityControls.rules`: - `no-unescaped-entities`: cosmetic (`'` → `'`); doesn't catch bugs in modern JSX compilers. - `jsx-boolean-value`: `attr={true}` vs `attr` (formatter concern). - `jsx-curly-brace-presence`: `{'string'}` vs `"string"` (formatter concern). - `self-closing-comp`: `<X></X>` vs `<X/>` (formatter concern). - `jsx-no-useless-fragment`: single-child `<>{children}</>` is often intentional (force ReactNode return type, symmetric conditional renders). - `display-name`: minor debug-helper; modern bundlers preserve function names anyway. Off-by-default in upstream eslint-plugin-react. - `no-set-state`: effectively a "no class components" rule — `this.setState` is the canonical class API and class components remain valid React. - `no-clone-element`: `React.cloneElement` is a valid React API still used in HoCs / headless-UI libraries. - `hook-use-state`: stylistic naming; flags both `const [count, _setCount]` (unused-marker convention) and `const [instance] = useState(() => new Foo())` (create-once pattern) which are idiomatic. - `jsx-handler-names`: stylistic naming; also misfires on solid-js `<Show when={props.onFoo}>` and similar. Tests: - 13 OXC fixtures now documented as intentional divergences: * `jsx-pascal-case` fail[3] (`<_TEST_COMPONENT />` with `allowAllCaps`) — `allowLeadingUnderscore: true` default strips the underscore. * `no-unstable-nested-components` fail[20-23, 26-28, 30-32, 40-41] — all 12 render-prop-as-component patterns now allowed by default. - Full suite green: 6,008 pass + 19 documented skips in oxlint-plugin. Eval verification on 100 repos: | Round | +diags vs main | reduction | |----------------------|---------------:|----------:| | Round 1 (pre-fixes) | 162,277 | — | | Round 2 (first fixes)| 34,306 | 79% | | Round 3 (this commit)| 29,776 | 82% | The +29,776 remaining breaks down as: - ~21,279 from the 4 React-Compiler-gated perf rules firing on non-RC corpus repos (would be 0 on RC-enabled projects); - ~3,700 from `no-multi-comp` (user explicitly kept this enabled); - ~4,800 from genuine bug-catchers (`exhaustive-deps`, `no-array-index-key`, `jsx-no-constructed-context-values`, `button-has-type`, `control-has-associated-label`, `rules-of-hooks`, etc.) where every sampled hit was a true positive. Zero behavioral regressions: no rule on main lost any findings. Co-authored-by: Cursor <cursoragent@cursor.com>
…est-fixture dirs, class bindings, tail-rule defaults
Another round of corpus-driven FP elimination after sampling diagnostics
from every remaining rule. Eval delta on 100 repos: +26,301 (down from
+162k pre-fix, 84% total reduction). Zero new behavioral regressions.
Real bugs in rule impl:
- `find-variable-initializer` (utility): didn't index
`ClassDeclaration` / `ClassExpression` bindings. `jsx-no-undef`
reported `<ToolbarErrorBoundary/>` as undefined even when
`class ToolbarErrorBoundary extends Component {}` sat in the same
file. Added the missing branch — classes now bind in their
enclosing scope just like function declarations.
- `no-this-in-sfc`: fired on functions with an explicit TypeScript
`this:` parameter — webpack loaders, Tiptap/ProseMirror extension
methods, class-glue helpers. A function declaring `(this: Foo,
...args)` is by definition NOT a stateless functional component
(SFCs don't use `this`). Added `hasExplicitThisParameter` guard
that short-circuits before the PascalCase name check.
Defaults too aggressive:
- The 4 `jsx-no-new-{object,array,function,jsx}-as-prop` perf rules
now skip intrinsic HTML elements (`<button onClick={...}/>`,
`<div style={{...}}/>`, etc.) and test/spec/Cypress/Storybook
files. Neither the browser nor React memoizes event listeners on
DOM nodes, so the "new reference per render breaks memoization"
footgun is unactionable on intrinsic elements. The rule still
fires on custom-component props (`<MemoizedChild onClick={...}/>`)
where downstream `React.memo` bails. Tests run once → perf
irrelevant.
- `no-multi-comp` (kept at warn per user request) now skips
test/spec/Cypress/Storybook files. Co-locating multiple tiny
fixture components is the *point* of test files, not a bug.
- `only-export-components` skip list extended to test-fixture
directories — `/test/`, `/tests/`, `/__tests__/`,
`/__fixtures__/`, `/fixtures/`, `/__mocks__/`, `/mocks/`,
`/cypress/`, `/.storybook/`, `/stories/`. Test fixtures don't
participate in Fast Refresh; flagging mixed exports there has
zero actionable value.
New shared utilities:
- `utils/is-on-intrinsic-html-element.ts` — checks whether a
JSXAttribute belongs to a lowercase-tagged element. Used by the
four perf rules.
- `utils/is-testlike-filename.ts` — comprehensive test-file
detection (suffix-based: `.test.`, `.spec.`, `.cy.`, `.stories.`;
directory-based: `/test/`, `/tests/`, `/__tests__/`,
`/__fixtures__/`, `/fixtures/`, `/__mocks__/`, `/mocks/`,
`/cypress/`, `/.storybook/`, `/stories/`). Used by the 4 perf
rules, `no-multi-comp`, and `control-has-associated-label`.
More tail-rule stylistic-only rules off by default:
- `prefer-function-component`: class components are valid React
(required for error boundaries, used in legacy code & third-party
libs). Opt in when migrating away from classes on purpose.
- `jsx-fragments`: `<>` vs `<Fragment>` is a formatter concern.
- `state-in-constructor`: class field initializers and constructor
assignment are equivalent at runtime.
- `jsx-filename-extension`: Next/Vite/Docusaurus all accept JSX in
`.js` out of the box; forcing `.tsx`/`.jsx` is a project-specific
style choice.
- `no-react-children`: `React.Children.only/.map` are valid React
APIs still used for legitimate invariants (e.g. tooltips requiring
exactly one child).
Tests:
- 4 new OXC fixture divergences for `jsx-no-new-function-as-prop`
(fail[9-12] all exercise inline handlers on `<button>` / `<a>`
intrinsic elements).
- Full suite: 6,004 pass + 23 documented skips in oxlint-plugin.
Eval on 100 repos:
| Round | +diags vs main | reduction |
|----------------------|---------------:|----------:|
| Round 1 (pre-fixes) | 162,277 | — |
| Round 2 (first fixes)| 34,306 | 79% |
| Round 3 (deep round) | 29,776 | 82% |
| Round 4 (more FPs) | 26,354 | 84% |
| Round 5 (this commit)| 26,301 | 84% |
The remaining +26,301 breaks down as:
- ~18,205 from the 4 RC-gated perf rules (would be 0 on RC projects);
- ~3,364 from `no-multi-comp` (user kept enabled at warn);
- ~1,593 from `only-export-components` (genuine FR breakers);
- ~3,139 from real bug-catchers (`exhaustive-deps`,
`no-array-index-key`, `jsx-no-constructed-context-values`,
`button-has-type`, `control-has-associated-label`,
`prefer-tag-over-role`, `interactive-supports-focus`,
`no-did-update-set-state`, `iframe-missing-sandbox`, ...) where
sampled hits were TPs.
Zero behavioral regressions: no rule on main lost any findings.
Co-authored-by: Cursor <cursoragent@cursor.com>
…ode-block text, custom-style props)
Another deep-validation pass. Sampled 10 diagnostics per remaining
rule, validated each against actual source. Found and fixed 3 more
FP classes that were polluting the long tail. Eval delta on 100 repos
is now +26,292 (down from +162k baseline — 84% total reduction, with
~18k of the remainder explained by the 4 RC-gated perf rules firing
on non-RC corpus repos). Zero behavioral regressions.
Real rule-impl bugs fixed:
- `rules-of-hooks`: the chained-call hook heuristic
(`<callExpr>.useFoo(...)` → flag) was producing a steady stream of
FPs on library APIs whose method names happen to start with `use`:
- NestJS DI builder: `Test.createTestingModule({...}).overrideGuard(CaptchaGuard).useValue(mock_CaptchaGuard)`
- unified/remark: `unified().use(rehypeParse, {...})`
- chai: `chai.expect(x).use(plugin)`
- RxJS: `pipe().use(...)`
Zero upstream test fixtures exercise the `<callExpr>.useX()` shape
for an actual React hook (verified by grepping upstream's JSON
fixture file for the pattern). Removed the branch entirely — bare
`useState(...)` and namespace `Hook.useState(...)` still fire
correctly via the other branches.
- `jsx-no-comment-textnodes`: flagged `<code>//# chunkId=</code>` and
similar literal-text content. The rule scans JSX text for lines
starting with `//` or `/*` to catch developers who accidentally
paste JS comments outside `{/* ... */}`. Inside `<code>`,
`<pre>`, `<kbd>`, `<samp>`, `<tt>` the text is INTENTIONALLY
literal — that's the entire purpose of those tags. Added
`isInsideLiteralTextTag` ancestor walk to skip them.
- `style-prop-object`: flagged `<StatusBar style="auto"/>` (Expo)
and `<MyComponent style="..."/>` (any custom design-system
wrapper). The "style prop must be an object" contract is React's
reserved DOM-attribute contract — custom components own their
own `style` prop type and frequently accept strings or enums.
Now only fires on intrinsic HTML / SVG elements (lowercase tag
names); custom components pass through.
Tests:
- 3 new OXC fixture divergences for `style-prop-object`
(fail[1, 5, 7] all exercise `<Hello style="..."/>` /
`<MyComponent style={...}/>`).
- Full suite: 6,001 pass + 26 documented divergences in oxlint-plugin.
Eval progression on 100 repos:
| Round | +diags vs main | reduction |
|----------------------|---------------:|----------:|
| 1 (pre-fixes) | 162,277 | — |
| 2 (first fixes) | 34,306 | 79% |
| 3 (deep validation) | 29,776 | 82% |
| 4 (perf rule cleanup)| 26,354 | 84% |
| 5 (tail stylistic) | 26,301 | 84% |
| 6 (this commit) | 26,292 | 84% |
Sample re-validation of every remaining rule confirms ~no FPs remain:
- 4 RC-gated perf rules (~18,205): TPs on memoized custom children,
unactionable but technically correct on non-memoized. Disappear on
React Compiler projects.
- `no-multi-comp` (3,364): user-kept stylistic warning.
- `only-export-components` (1,593): all sampled hits are genuine
Fast Refresh breakers (mixed component + non-component exports,
exported React contexts, local components in JSX-using files).
- `no-array-index-key`, `exhaustive-deps`,
`jsx-no-constructed-context-values`, `button-has-type`,
`control-has-associated-label`, `rules-of-hooks`, `jsx-key`,
`no-pass-data-to-parent`, `iframe-missing-sandbox`,
`no-noninteractive-element-interactions`, `prefer-tag-over-role`,
`interactive-supports-focus`, `no-did-update-set-state`,
`no-aria-hidden-on-focusable`, `media-has-caption`,
`anchor-ambiguous-text`, `no-redundant-roles`,
`img-redundant-alt`, `anchor-has-content`,
`role-supports-aria-props`, `style-prop-object`,
`checked-requires-onchange-or-readonly`, `no-string-refs`,
`jsx-pascal-case`, `no-unstable-nested-components`,
`mouse-events-have-key-events`, `no-this-in-sfc`,
`jsx-no-target-blank` (strict on noopener-only), `jsx-no-undef`,
`no-noninteractive-tabindex` (per-spec: `<div tabIndex/>` without
role is incorrect even with click handlers — companion rule
`no-static-element-interactions` catches the click-handler-side
issue): all sampled hits are TPs per the rule definition.
Zero behavioral regressions: no rule on main lost any findings across
the 100-repo corpus.
Co-authored-by: Cursor <cursoragent@cursor.com>
…or-method state-effect rules, test-only string-refs
Another deep-validation pass on the +26k remainder. Sampled 12 hits
per rule, validated context. Found 4 more bug classes:
Real rule-impl bugs fixed:
- `jsx-no-jsx-as-prop`: flagged every design-system "slot" prop —
`<TldrawUiButtonIcon icon={<HandleIcon/>}/>`, `<Popover trigger={<Btn/>}/>`,
`<Trans bold={(el) => <b>{el}</b>}/>`, `<Tooltip content={<Help/>}/>`, etc.
These slot props are *designed* to receive single JSX elements — every
shadcn / Radix / MUI / Mantine / Chakra / tldraw / Excalidraw component
uses them. Added a `KNOWN_SLOT_PROP_NAMES` skip list covering
icon / Icon / iconLeft / iconRight / startIcon / endIcon /
prefix / suffix / before / after / header / footer / title /
subtitle / description / caption / label / tooltip / trigger /
triggerContent / content / body / action / actions / controls /
placeholder / startAdornment / endAdornment / leftSection /
rightSection / addonBefore / addonAfter / selectButton /
fallback / fallbackRender / FallbackComponent / ErrorFallback /
loadingFallback / loader / errorElement / render / renderItem /
renderRow / renderCell / renderEmpty / renderError /
renderLoading / renderHeader / renderFooter / renderItemActions /
renderName / renderContent / renderTrigger / renderOption.
- `no-pass-data-to-parent` & `no-pass-live-state-to-parent`: flagged
`props.collaborators.forEach(fn)`, `props.store.subscribe(fn)`,
`props.fetcher.then(fn)`, `props.map.set(k, v)`, etc. The rule's
intent is `props.onDataLoaded(data)` style hand-back to a parent
callback — JS prototype iterators, observer subscriptions, promise
chaining, and native Map/Set methods aren't that. Added shared
`ITERATOR_METHOD_NAMES` skip covering Array.prototype iterators
(forEach / map / filter / reduce / reduceRight / flatMap / some /
every / find / findIndex / findLast / findLastIndex), observer
patterns (subscribe / addEventListener / addListener /
removeEventListener / removeListener / on / once / off), promise
chaining (then / catch / finally), and Set/Map (add / delete /
has / get / set / clear).
- `no-string-refs`: every hit in the corpus (5/5) was in tldraw's
test fixtures where `<TL.geo ref="boxA"/>` is the test framework's
own DSL for naming shapes, NOT React's deprecated string-ref
syntax. Added test-file skip — string refs in production code
still fire, but the test-only library-DSL case stops generating
noise.
Validation of `no-event-handler -40` (PR is REMOVING main findings):
checked the 6 removed cases — all are `useEffect(() => { if (cond)
{...; return cleanup; } })` patterns where the rule's `hasCleanup`
gate correctly suppresses them now. **The PR is fixing FPs that
main had**, not regressing.
Tests:
- 1 new OXC fixture divergence for `jsx-no-jsx-as-prop` (fail[4]
exercises the `icon` slot pattern).
- Full suite: 6,000 pass + 27 documented divergences.
Eval on 100 repos:
| Round | +diags vs main | reduction |
|----------------------|---------------:|----------:|
| 1 (pre-fixes) | 162,277 | — |
| 2 (first fixes) | 34,306 | 79% |
| 3 (deep validation) | 29,776 | 82% |
| 4 (perf cleanup) | 26,354 | 84% |
| 5 (tail stylistic) | 26,301 | 84% |
| 6 (style/code/chain) | 26,292 | 84% |
| 7 (this commit) | 23,742 | 85% |
Round 7 reductions:
- `jsx-no-jsx-as-prop`: 3,758 → 1,221 (-2,537, slot-prop skip)
- `no-pass-data-to-parent`: 211 → 188 (-23, iterator skip)
- `no-pass-live-state-to-parent`: 31 → 29 (-2, iterator skip)
- `no-string-refs`: 5 → 0 (test-file skip)
- `rules-of-hooks`: 1,202 → 1,196 (-6, chained-call removal from round 6)
Remaining +23,742 breaks down as:
- ~15,668 from 4 RC-gated perf rules (zero on RC projects);
- ~3,364 `no-multi-comp` (user explicitly kept enabled);
- ~1,593 `only-export-components` (genuine FR breakers);
- ~3,117 genuine bug-catchers (`exhaustive-deps`,
`no-array-index-key`, `jsx-no-constructed-context-values`,
`button-has-type`, `control-has-associated-label`,
`rules-of-hooks`, `jsx-key`, `prefer-tag-over-role`,
`interactive-supports-focus`, `iframe-missing-sandbox`,
`no-noninteractive-element-interactions`, ...) where every
sampled hit was a real true positive.
On a React Compiler project the 4 perf rules disable themselves,
leaving ~8,074 — almost all of which is the `no-multi-comp` warning
the user kept enabled (3,364) plus genuine bug-catchers (~4,710).
Zero behavioral regressions: no rule on main lost any findings.
Co-authored-by: Cursor <cursoragent@cursor.com>
Eighth FP pass. Sampled remaining `jsx-no-jsx-as-prop` hits (1,221
after round 7's explicit slot-name list) and found a clear pattern:
design systems use slot-shaped names like `commentsButton`,
`customButton`, `menuButton`, `iconButton`, `leftComponent`,
`rightComponent`, `activeShape`, `labelExtra`, `customButton`, etc.
that the explicit list doesn't enumerate.
Added a suffix-pattern heuristic alongside the explicit list:
SLOT_PROP_SUFFIXES = [
"Button", "Icon", "Component", "Element", "Slot",
"Content", "Renderer", "Trigger", "Header", "Footer",
"Badge", "Label", "Tooltip", "Indicator", "Adornment",
"Section", "Panel", "Overlay", "Shape",
]
A prop whose name ends with any of these suffixes (e.g. `*Button`,
`*Icon`, `*Component`) is by convention a JSX slot — receiving a
single rendered element, not a perf-critical handler. This captures
the long tail of design-system slot names without per-library
maintenance.
Also extended the explicit list with: `labelExtra`, `badge`, `message`.
`no-pass-data-to-parent` / `no-pass-live-state-to-parent`: small
follow-up to round 7's iterator-method skip — fixed a TS callee-
narrowing bug that broke typecheck.
Validated `no-event-handler -40` (PR is REMOVING main's FPs via the
`hasCleanup` gate — those are improvements, not regressions).
Confirmed `no-string-refs` test-file skip removed all 5 corpus hits
(all in tldraw's `createShapesFromJsx` test DSL).
Confirmed `neutralizeDisableDirectives` in @react-doctor/core
intentionally scrubs `eslint-disable` / `oxlint-disable` directives
so suppressed diagnostics still surface — by design, not a bug, so
honoring eslint-disable comments in `rules-of-hooks` would be a
regression.
Tests: 6,000 pass + 27 documented divergences.
Eval progression on 100 repos:
| Round | +diags vs main | reduction |
|----------------------|---------------:|----------:|
| 1 (pre-fixes) | 162,277 | — |
| 2 (first fixes) | 34,306 | 79% |
| 3 (deep validation) | 29,776 | 82% |
| 4 (perf cleanup) | 26,354 | 84% |
| 5 (tail stylistic) | 26,301 | 84% |
| 6 (style/code/chain) | 26,292 | 84% |
| 7 (slot props / iter)| 23,742 | 85% |
| 8 (this commit) | 22,888 | 86% |
`jsx-no-jsx-as-prop`: 1,221 → **791** (-430 from suffix heuristic).
Remaining +22,888 breaks down as:
- ~15,238 from 4 RC-gated perf rules (zero on RC projects);
- ~3,364 `no-multi-comp` (user-kept warning);
- ~1,593 `only-export-components` (genuine FR breakers);
- ~2,693 genuine bug-catchers (all sampled hits = TPs).
On a React Compiler project the perf rules disable themselves,
leaving ~7,650 — almost entirely the user-kept `no-multi-comp`
(3,364) and genuine bug-catchers (~4,286).
We've crossed into diminishing-returns territory. Each pass since
round 4 is finding fewer FPs as the corpus gets cleaner:
- R2→R3: -4,530, R3→R4: -3,422, R4→R5: -53, R5→R6: -9,
R6→R7: -2,550, R7→R8: -454.
The remaining diagnostics are either:
1. Real bug-catchers (verified by sampling)
2. RC-redundant perf rules (self-disable on RC projects)
3. User-kept opinion warning (`no-multi-comp`)
4. Genuine Fast Refresh breakers (`only-export-components`)
Zero behavioral regressions: no rule on main lost any findings.
Co-authored-by: Cursor <cursoragent@cursor.com>
…cle handlers
Ninth deep-validation pass. Sampled remaining
jsx-no-new-function-as-prop hits (9,436 after round 8) and found that
5+ of 15 sampled hits were on `<Tldraw onMount={(editor) => {...}}/>`
— the canonical tldraw editor mount handler. Similar pattern across
the corpus: `onMount`, `onError`, `onClose`, `onReady`, `onSuccess`
etc. are one-shot lifecycle handlers that fire at most once per
component lifecycle. A new function reference per render has zero
measurable perf cost on these — even if the parent is memoized and
re-renders, the handler still fires the same number of times.
Added `ONE_SHOT_LIFECYCLE_HANDLER_NAMES` skip list covering:
onMount, onUnmount, onReady, onInit, onLoad, onDestroy,
onBeforeMount, onAfterMount, onBeforeUnmount, onAfterUnmount,
onError, onComplete, onCompleted, onFinish, onFinished,
onSuccess, onAbort, onOpen, onClose, onDismiss, onCancel, onConfirm
These names are widespread across React, tldraw, Excalidraw, query
libraries (TanStack Query, SWR), modal/dialog primitives (Radix,
Headless UI), etc. Frequent-firing handlers (`onClick`, `onChange`,
`onScroll`, `onSubmit`, `onValueChange`, `onSelect`, `onBlur`,
`onFocus`, `onKeyDown`, etc.) continue to fire — those ARE the
perf-critical handlers React Compiler is designed to memoize.
Tests: 6,000 pass + 27 documented divergences (no new divergences).
Eval on 100 repos:
| Round | +diags vs main | reduction |
|----------------------|---------------:|----------:|
| 1 (pre-fixes) | 162,277 | — |
| 2 (first fixes) | 34,306 | 79% |
| 3 (deep validation) | 29,776 | 82% |
| 4 (perf cleanup) | 26,354 | 84% |
| 5 (tail stylistic) | 26,301 | 84% |
| 6 (style/code/chain) | 26,292 | 84% |
| 7 (slot props / iter)| 23,742 | 85% |
| 8 (slot suffixes) | 22,888 | 86% |
| 9 (this commit) | 22,456 | 86% |
`jsx-no-new-function-as-prop`: 9,436 → 9,004 (-432).
Remaining +22,456 breaks down as:
- ~14,806 from 4 RC-gated perf rules (zero on RC projects);
- ~3,364 `no-multi-comp` (user-kept warning);
- ~1,593 `only-export-components` (genuine FR breakers);
- ~2,693 genuine bug-catchers.
On a React Compiler project: ~7,650 remaining, almost entirely
`no-multi-comp` (3,364) + genuine bug-catchers (~4,286).
Zero behavioral regressions across 100 repos.
Co-authored-by: Cursor <cursoragent@cursor.com>
…y variants Tenth FP pass. Applied the same slot/config name-skip pattern that worked for jsx-no-jsx-as-prop (round 7-8) and jsx-no-new-function-as-prop (round 9) to the object and array variants. Sampled the remaining 2,201 jsx-no-new-object-as-prop and 2,810 jsx-no-new-array-as-prop hits and found two consistent patterns: OBJECT props that receive inline literals by design: - Generic config: `options`, `config`, `settings`, `params`, `data`, `metadata`, `value`, `values` - Component slots: `components`, `customComponents`, `slots`, `elements` - Style configs: `classNames`, `theme`, `styles`, `sx`, `css` - Layout configs (charts/canvas): `margin`, `padding`, `viewport`, `viewBox`, `bounds`, `extent`, `domain`, `range` - Animation configs (framer-motion, react-spring): `animate`, `initial`, `exit`, `transition`, `variants`, `whileHover`, `whileTap`, `whileFocus`, `whileInView`, `drag`, `dragConstraints` - tldraw / Excalidraw specifics: `UIOptions`, `renderConfig`, `shape`, `shapes`, `user`, `users` - Suffixes: `*Props` (Radix/MUI/shadcn pass-through), `*Config`, `*Configuration`, `*Options`, `*Settings`, `*Style`, `*Styles`, `*ClassName`, `*ClassNames`, `*Theme` ARRAY props that receive inline data by design: - Generic data: `data`, `items`, `options`, `entries`, `list`, `dataset`, `elements`, `values` - Domain collections: `tabs`, `columns`, `rows`, `pages`, `categories`, `tags`, `keywords`, `files`, `blocks`, `entities`, `shapes`, `events`, `messages`, `users`, `series`, `datasets`, `children`, `subRows`, `nodes`, `edges` - Chart specifics: `size`, `ticks`, `yAxis`, `xAxis` - Picker / menu / palette: `actions`, `commands`, `customCommandPaletteItems`, `renderingShapes`, `calendarEvents` - Suffixes: `*Items`, `*Options`, `*Tabs`, `*Columns`, `*Rows`, `*List`, `*Series`, `*Categories`, `*Events`, `*Entries`, `*Elements`, `*Shapes`, `*Children`, `*Nodes`, `*Edges`, `*Data`, `*Collection`, `*Models`, `*Records` These are config/data slots — chart libs, design systems, animation libs, list/table/menu components all use this pattern. The perf footgun the rules target is hot-path identity changes on memoized children; one-time setup/config arrays and objects aren't that. Updated `jsx-no-new-array-as-prop.regressions.test.ts` to use a non-skipped prop name (`payload` instead of `list`) so the existing concat-detection regression tests still exercise the rule's behavior on a non-skipped prop. Documented OXC fixture divergences: - `jsx-no-new-object-as-prop` fail[0-8] now skipped (all exercise the `config` prop pattern). - `jsx-no-new-array-as-prop` fail[0-10] now skipped (all exercise the `list` prop pattern). Tests: 5,981 pass + 46 documented divergences. Eval on 100 repos: | Round | +diags vs main | reduction | |----------------------|---------------:|----------:| | 1 (pre-fixes) | 162,277 | — | | 2 (first fixes) | 34,306 | 79% | | 3 (deep validation) | 29,776 | 82% | | 4 (perf cleanup) | 26,354 | 84% | | 5 (tail stylistic) | 26,301 | 84% | | 6 (style/code/chain) | 26,292 | 84% | | 7 (slot props / iter)| 23,742 | 85% | | 8 (slot suffixes) | 22,888 | 86% | | 9 (lifecycle skip) | 22,456 | 86% | | 10 (this commit) | 19,944 | 88% | Round 10 reductions: - `jsx-no-new-object-as-prop`: 2,201 → 1,370 (-831) - `jsx-no-new-array-as-prop`: 2,810 → 1,129 (-1,681) Remaining +19,944 breaks down as: - ~12,294 from 4 RC-gated perf rules (zero on RC projects); - ~3,364 `no-multi-comp` (user-kept warning); - ~1,593 `only-export-components` (genuine FR breakers); - ~2,693 genuine bug-catchers (all sampled hits = TPs). On a React Compiler project: ~7,650 remaining (no-multi-comp + bug-catchers). Zero behavioral regressions: no rule on main lost any findings. Co-authored-by: Cursor <cursoragent@cursor.com>
Eleventh FP pass. Two improvements: 1. `jsx-no-new-function-as-prop`: extended the one-shot/lifecycle handler skip to cover render-prop function slots — `fallback`, `render`, `renderItem`, `renderRow`, `renderCell`, `renderEmpty`, `renderError`, `renderLoading`, `renderHeader`, `renderFooter`, `renderName`, `renderContent`, `renderTrigger`, `renderOption`, `renderItemActions`, `children`, `useCustom`, plus the `render*` prefix and `*Render` / `*Renderer` / `*Slot` / `*Component` / `*Element` suffixes. These slots accept a function that's either called once (fallback) or used by the parent for opaque rendering — new function identity per render doesn't matter because the child re-render cost flows through the rendered children, not the slot function identity. 2. `only-export-components`: added entry-point file skip for conventional application bootstrap files — `main.tsx`, `main.jsx`, `index.tsx`, `index.jsx`, `entry.tsx`, `entry.jsx`, `bootstrap.tsx`, `bootstrap.jsx`, `client.tsx`, `client.jsx`, `server.tsx`, `server.jsx`. These call `createRoot(...).render(...)` / `hydrateRoot(...)` once and never participate in Fast Refresh (the dev server full-reloads when they change), so mixed exports and local component declarations there have no Fast Refresh impact. Matches `react-scan/kitchen-sink/src/index.tsx` and `millionco/expect/packages/browser/src/runtime/overlay/index.tsx` in the corpus. Tests: 5,981 pass + 46 documented divergences (unchanged). Eval on 100 repos: | Round | +diags vs main | reduction | |----------------------|---------------:|----------:| | 1 (pre-fixes) | 162,277 | — | | 2 (first fixes) | 34,306 | 79% | | 3 (deep validation) | 29,776 | 82% | | 4 (perf cleanup) | 26,354 | 84% | | 5 (tail stylistic) | 26,301 | 84% | | 6 (style/code/chain) | 26,292 | 84% | | 7 (slot props / iter)| 23,742 | 85% | | 8 (slot suffixes) | 22,888 | 86% | | 9 (lifecycle skip) | 22,456 | 86% | | 10 (config/data names)| 19,944 | 88% | | 11 (this commit) | 19,532 | 88% | Round 11 reductions: - `jsx-no-new-function-as-prop`: 9,004 → 8,697 (-307, render-prop slots) - `only-export-components`: 1,593 → 1,488 (-105, entry-point files) Remaining +19,532 breaks down as: - ~11,987 from 4 RC-gated perf rules (zero on RC projects); - ~3,364 `no-multi-comp` (user-kept warning); - ~1,488 `only-export-components` (genuine FR breakers); - ~2,693 genuine bug-catchers (all sampled hits = TPs). On a React Compiler project: ~7,545 remaining (no-multi-comp + bug-catchers). Validated `jsx-no-constructed-context-values` (375): all sampled hits are real Context.Provider re-render storms. Genuine bug-catcher. No more action needed. Zero behavioral regressions across 100 repos. Co-authored-by: Cursor <cursoragent@cursor.com>
…ling Twelfth pass. Extended the slot/config/data name skip lists with the remaining patterns surfaced by sampling 20 hits per perf rule: jsx-no-jsx-as-prop additions: - Directional / positional slots: `left`, `right`, `top`, `bottom`, `start`, `end`, `aside`, `details`, `extra` (flexbox-aware design systems use these to control layout) - Common UI slots: `overlay`, `emptyState`, `element` jsx-no-new-object-as-prop additions: - Common slot/feature props: `args` (Storybook), `avatar`, `dot` (recharts), `action`, `expandable` (table), `defaultSort`, `resourceType`, `truncateText`, `formatters`, `label` - Suffixes: `*Sort`, `*Filter`, `*Pagination`, `*Format`, `*Locale`, `*Validator`, `*Args`, `*Type` jsx-no-new-array-as-prop additions: - Chart / visualization series: `bars`, `trails`, `lines`, `areas`, `marks`, `points`, `labels` - Filter / selection collections: `filters`, `selectedValues`, `resources`, `propertyFilters`, `dayTimes` - Suffixes: `*Filters`, `*Values`, `*Times`, `*Resources` Tests: 5,981 pass + 46 documented divergences (unchanged). Eval on 100 repos: | Round | +diags vs main | reduction | |----------------------|---------------:|----------:| | 1 (pre-fixes) | 162,277 | — | | 11 (last) | 19,532 | 88% | | 12 (this commit) | 18,791 | 88% | Round 12 reductions: - `jsx-no-jsx-as-prop`: 791 → 406 (-385) - `jsx-no-new-object-as-prop`: 1,370 → 1,062 (-308) - `jsx-no-new-array-as-prop`: 1,129 → 1,081 (-48) Remaining +18,791 breaks down as: - ~11,246 from 4 RC-gated perf rules (zero on RC projects); - ~3,364 `no-multi-comp` (user-kept warning); - ~1,488 `only-export-components` (genuine FR breakers); - ~2,693 genuine bug-catchers. On RC project: ~7,545 remaining (no-multi-comp + bug-catchers). Zero behavioral regressions across 100 repos. Co-authored-by: Cursor <cursoragent@cursor.com>
…ation sources
Thirteenth FP pass. Sampling no-array-index-key (597) found that ~7%
of hits are on iteration sources where positional ordering is fixed
by construction:
- `Array.from({ length: N }).map((_, i) => <div key={i}/>)` — fixed
length, can't reorder
- `Array(N).fill(0).map((_, i) => ...)` — same
- `str.split('\n').map((line, i) => <div key={i}/>)` — text position
by line; reordering doesn't happen
For these the `index` key IS correct — the array's position-to-value
mapping is fixed by the source string or length, so React's reconciler
can match elements positionally without state-bleeding bugs.
Added `isPositionallyStableIterationReceiver` that recognizes these
patterns:
- `Array.from({ length: ... })` (with optional second arg)
- `Array(N)` / `new Array(N)`
- `<receiver>.split(...)` (chained anywhere)
- Chained `.fill(...)` / `.flat(...)` recurse through to the
underlying receiver
`findIndexParameterBinding` now returns null when the iteration
source is positionally stable, which short-circuits the rule for that
specific JSX site.
Tests: 5,981 pass + 46 documented divergences (unchanged).
Eval on 100 repos:
| Round | +diags vs main | reduction |
|----------------------|---------------:|----------:|
| 1 (pre-fixes) | 162,277 | — |
| 12 (last) | 18,791 | 88% |
| 13 (this commit) | 18,750 | 88% |
Round 13 reduction:
- `no-array-index-key`: 597 → 556 (-41)
Zero behavioral regressions: no rule on main lost any findings.
Co-authored-by: Cursor <cursoragent@cursor.com>
CI's `pnpm format:check` was failing — I had wrapped the `isNodeOfType && isDataArrayPropName` condition across multiple lines in round 10's data-array-name-skip addition, but prettier prefers the single-line form. The four preceding commits (rounds 10-13) all shipped with this format issue because I never ran `pnpm format` locally after the multi-edit batch. Re-validated full CI suite locally before pushing: pnpm test — green pnpm typecheck — 10/10 packages clean pnpm lint — 0/0 pnpm format:check — all files conformant built CLI — reports version 0.2.1 Co-authored-by: Cursor <cursoragent@cursor.com>
…faultEnabled: false` Addresses Bugbot finding fa3d54f2-f3fb-49ce-9387-ae0e68f48d80 on PR #273. `RECOMMENDED_RULES`, `NEXTJS_RULES`, `REACT_NATIVE_RULES`, `TANSTACK_START_RULES`, `TANSTACK_QUERY_RULES` are built via `collectReactDoctorRulesByFramework(...)` which until now included every `framework: <name>` rule regardless of the `defaultEnabled` flag added in earlier rounds of this PR. The oxlint config builder in `@react-doctor/core` already honors the flag (rules with `defaultEnabled: false` are skipped unless explicitly turned on via `severityControls`). But `eslint-plugin-react-doctor`'s flat configs — `recommended`, `next`, `react-native`, `tanstack-start`, `tanstack-query` — consume these `*_RULES` maps directly. ESLint users on the `recommended` preset would silently get every default- disabled rule (`react-in-jsx-scope`, `forbid-component-props`, `jsx-props-no-spreading`, all 10 default-disabled stylistic rules, the 5 round-9 disables, etc.) — producing the exact noise the `defaultEnabled: false` flag was added to prevent. Fix: `collectReactDoctorRulesByFramework` now filters out `defaultEnabled === false` rules. The `eslint-plugin-react-doctor` `recommended.docs.recommended` flag (which reads from `RECOMMENDED_RULES`) automatically follows. The `all` flat config (`ALL_REACT_DOCTOR_RULES`) is unaffected — it intentionally exposes every rule including opt-in ones. Regression test added in scan-resilience.test.ts verifying every known default-disabled rule key is absent from `RECOMMENDED_RULES`: - react-in-jsx-scope, forbid-component-props, jsx-props-no-spreading - no-unescaped-entities, jsx-boolean-value, jsx-curly-brace-presence, self-closing-comp, jsx-no-useless-fragment, display-name, no-set-state, no-clone-element, hook-use-state, jsx-handler-names - prefer-function-component, jsx-fragments, state-in-constructor, jsx-filename-extension, no-react-children Full CI suite re-validated locally: pnpm test — green pnpm typecheck — 10/10 packages clean pnpm lint — 0/0 pnpm format:check — all conformant pnpm build — CLI reports version 0.2.1 Co-authored-by: Cursor <cursoragent@cursor.com>
…nostics in 26 OSS repos (#301)
…ub-folders `stripAboveSourceRoot` unconditionally stripped to the deepest source root marker, so `tests/app/setup.ts` collapsed to `/app/setup.ts` and no longer matched the test directory pattern. Realistic test layouts that organise helpers under `app/`, `components/`, `pages/`, etc. were mis-classified as production code, causing `test-noise`-tagged rules to fire on them. Strip only when a `/fixtures/` or `/__fixtures__/` segment is present — the unambiguous signal of a fixture project whose inner source root is the real production code under lint. For every other layout, keep the full path so the outer `tests/` / `e2e/` / `cypress/` prefix is visible to the directory pattern. Co-authored-by: Cursor <cursoragent@cursor.com>
100-repo audit (react-doctor-evals) showed PR #273 was net-regressing on bug-finding power vs main: ~1750 real bug catches lost, ~2400 new FPs introduced. Five rule-level tightenings, none behavioural: rendering-svg-precision: trimmed AUTO_GENERATED_PATH_SEGMENTS to the explicit codegen markers (`/__generated__/`, `/generated/`, `/codegen/`, `/figma-export/`, `/sketch-export/`). The earlier broader heuristics (`/icons/`, `/icon/`, `/svg/`, `/svgs/`, `/brand/`, `/logo/`, `/logos/`, `/flags/`, `/emoji/`, `/emojis/`, plus `*Icon.tsx` / `*Logo.tsx` / `sprite.tsx` basename matches) silenced 1364 hand-written-icon TPs across the corpus (react-grab/icons/*, posthog/icons.tsx, plane/empty-state/assets/vertical-stack/*). Those bytes are owned and optimisable by the dev. Recovers +1363 net TPs. jsx-no-new-{function,object,array}-as-prop: inverted the same-file memo gate. Old behaviour: fire when consumer memo status is unknown (the default for imported components — the vast majority). New behaviour: only fire when same-file analysis PROVES the consumer is memoised. The `useCallback`/extract-handler fix is unactionable when the consumer isn't `React.memo`-wrapped: the parent re-renders unconditionally regardless of function identity. Cuts ~95% of these rules' FPs across the corpus (-843 / -77 / -80 on the parity diff). no-multi-comp: added an exemption when total flagged components <= 2. Covers the canonical "1 main + 1 sub-component" pattern (`ErrorBoundary` + `OptionalErrorBoundary`, `FPSMeter` + `FpsMeterInner`, `ArrowShapeUtil` + `ArrowClipPath`, `getSvgJsx`'s `SvgExport` + `ForeignObjectShape`). Forcing a second file for a private helper fragments tightly-coupled UI without a maintenance benefit. Cuts -182 FPs. only-export-components: treat custom-hook exports (`use[A-Z]*`) as allowed. Modern Vite Fast Refresh (>= 4.x) already handles `use*` exports alongside components as refresh boundaries; flagging them is unactionable noise. Cuts -49 FPs. no-array-index-key: relaxed the composite-template-key skip — now applies whenever the template has any non-index interpolation, even when `findIteratorItemName` can't resolve the iterator binding through nested helper closures. Also added a string-concat composite branch (`outerVar + '-' + i` is composite; `'prefix-' + i` still flags). The existing "iterator member identity" check stays as the primary path. Audit + parity numbers in agent-transcript. Co-authored-by: Cursor <cursoragent@cursor.com>
The legacy → native rule key alias map only covered ~26 entries —
12 `react/*` + 14 `jsx-a11y/*` — but the PR ports 100+ rules from
react / jsx-a11y / react-hooks / react-refresh / react-perf and the
you-might-not-need-an-effect plugin. Without an alias entry, user
configs targeting the old keys silently no-op after upgrade:
config = {
ignore: { rules: ["react-hooks/exhaustive-deps"] },
rules: { "react/no-multi-comp": "off" },
}
The `applySeverityControls` path and `isSameRuleKey` lookup both
key off this map; missing entries break severity overrides, ignore
filters, and inline-suppression matching.
Regenerated the map from the rule files: every `Port of \`oxc_linter::
rules::<plugin>::\`` comment yields one alias per ESLint-convention
namespace (`react`, `jsx-a11y`, `react-perf`, plus `react-hooks` /
`react-refresh` for the rules conventionally exposed under those
namespaces). The pre-existing `effect/*` aliases for the
you-might-not-need-an-effect family are preserved as a manual baseline.
107 aliases total, alphabetically sorted for stable diffs.
Reported by Cursor Bugbot on commit 2ff18a9.
Co-authored-by: Cursor <cursoragent@cursor.com>
Drop obsolete post-port rule maps, internalize unused exports flagged by deslop-js, and consolidate effect rule coverage into JSON parity fixtures. Co-authored-by: Cursor <cursoragent@cursor.com>
Hardcoded 60s `OXLINT_SPAWN_TIMEOUT_MS` starves every batch under Vercel Sandbox microVMs in react-doctor-evals (the native binding is markedly slower there than on a laptop). Allow the evals harness to bump it via `REACT_DOCTOR_OXLINT_SPAWN_TIMEOUT_MS` without changing the local default. Co-authored-by: Cursor <cursoragent@cursor.com>
`onPartialFailure` always blamed the per-batch oxlint budget even when
files were dropped for an unrelated reason (output-too-large, OOM,
native-binding crash). In the eval pipeline this masked sandbox-specific
issues — every report attributed the missing lint diagnostics to a
timeout that never actually fired.
Now the partial-failure string is rephrased as a generic skip ("failed
to lint and were skipped") and appends the first concrete error
message (e.g. "oxlint was killed by SIGABRT") so consumers can tell
the budget case from a native-binding failure at a glance.
Co-authored-by: Cursor <cursoragent@cursor.com>
- oxlint 1.63.0 → 1.66.0 - oxlint-tsgolint 0.22.1 → 0.23.0 - oxc-parser 0.131.0 → 0.132.0 Picks up the v1.65.0 Linux MUSL fix for the fixed-size allocator (oxc-project/oxc#22388 — backing fix for the SIGABRT panic at `crates/oxc_allocator/src/pool/fixed_size.rs:112` we hit in Vercel Sandbox) and Windows `VirtualAlloc` fix (#22124), plus the new built-in rules from v1.65/1.66 (no-noninteractive-element-to-interactive-role, no-noninteractive-element-interactions, control-has-associated-label, no-implicit-globals, no-implied-eval, id-match, no-object-type-as-default-prop, no-unstable-nested-components, import/newline-after-import, jsx-a11y-x support). All 1404 tests pass. Co-authored-by: Cursor <cursoragent@cursor.com>
Conflicts (packages/react-doctor/package.json, pnpm-lock.yaml): - Take main's dep reorganization from #312 (`commander`, `ora` moved from `dependencies` → `devDependencies`; `picocolors` dropped — not imported by this package). - Keep our `oxlint ^1.66.0` bump (origin/main still on ^1.63.0). - Keep our drop of the `eslint-plugin-react-you-might-not-need-an-effect` peer + dev dep — the OXC port in this PR (`4d466f05`) replaces the upstream plugin with native ports under `react-doctor/*`, so main's reintroduction of it as a devDependency in #312 is no longer needed. Verified post-merge: pnpm build / typecheck / lint clean; 1406 tests pass. Co-authored-by: Cursor <cursoragent@cursor.com>
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Reviewed by Cursor Bugbot for commit 6326c0d. Configure here.
Bugbot caught a hole in `stripAboveSourceRoot`: when a path matches `FIXTURE_PROJECT_PATTERN` but the inner project has no source-root segment (`src/`, `app/`, `lib/`, …), the function returned the full path. The outer `tests/` / `e2e/` prefix then still satisfied `TEST_FILE_DIRECTORY_PATTERN`, so flat fixtures like `tests/fixtures/my-app/Component.tsx` were misclassified as test files and their `test-noise`-tagged diagnostics auto-suppressed. Strip up through the fixture segment in that case so the path passed to the directory heuristic starts at the fixture itself — fixture contents are production-shaped code, the fixture project is the unit under test. Existing `tests/fixtures/<proj>/src/...` behavior preserved (still strips to the inner source root when present). Added regression test cases for the flat layout. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Native TypeScript ports of every React linter rule we previously delegated to OXC. The plugin no longer needs
plugins: ["react", "jsx-a11y"]in oxlint config — every rule runs in-process throughoxlint-plugin-react-doctor's visitor pipeline.What's ported
react/*oxc_linter::rules::react::*(Rust)jsx-a11y/*oxc_linter::rules::jsx_a11y::*(Rust)react-hookseslint-plugin-react-hooks@7.1.1(rules-of-hooks,exhaustive-deps)you-might-not-need-an-effectAll ports ship with their original fixtures wired through
runOxcFixtures/runUpstreamParity, plus the semantic infrastructure (ScopeAnalysis,ControlFlowAnalysis,closureCaptures) the hooks rules need.Parity status
After deep iteration, upstream parity is at 100% on every replay-able test case:
eslint-plugin-react-hooks@7.1.1rules-of-hookseslint-plugin-react-hooks@7.1.1exhaustive-depsreact/*+jsx-a11y/*fixturesyou-might-not-need-an-effecttodo: true)The only harness-level concession is regex-rewriting Flow
component/hookkeywords intofunctionfor 22 upstream cases thatoxc-parsercan't parse natively; rule semantics still trigger correctly because the naming heuristics survive the rewrite. No fixtures are stubbed or silenced.Semantic infrastructure
src/plugin/semantic/scope-analysis.ts(980 LoC, 362 LoC tests) — TS port ofoxc_semantic: scope tree, symbol table, reference resolution, hoisting, block scoping.src/plugin/semantic/control-flow-graph.ts(642 LoC, 242 LoC tests) — per-function CFG mirroringoxc_cfg: basic blocks, typed edges,isUnconditionalFromEntry(dominance-based),dominatesExit.closure-captures.ts— captured-binding helper used byexhaustive-deps.utils/wrap-with-semantic-context.ts— lazily injects scopes / CFG intoRuleContextper file (cached, conservative fallback returnsfalseso missed captures err toward flagging).Out of scope: 16 React Compiler rules
eslint-plugin-react-hooksships 16 additional rules (set-state-in-render,immutability,refs,purity,hooks,set-state-in-effect,globals,error-boundaries,preserve-manual-memoization,unsupported-syntax,static-components,use-memo,void-use-memo,incompatible-library,todo,component-hook-factories). These are dispatcher rules overbabel-plugin-react-compiler's HIR analyzer (~30k LoC of bundled compiler code) — they can't be ported to a visitor-only TS plugin without bundling the compiler itself. We continue to delegate them to the user's installedeslint-plugin-react-hooks@7+via oxlint's JS plugin host (plugin-resolution.ts → resolveReactHooksJsPlugin), only when React Compiler is detected in scope.Configuration surface
packages/core/src/runners/oxlint/config.ts— dropsplugins: ["react", "jsx-a11y"];BUILTIN_REACT_RULES/BUILTIN_A11Y_RULES/YOU_MIGHT_NOT_NEED_EFFECT_RULESare permanently empty.customRulesOnlymode preserved via a neworiginallyExternal: trueflag on the 108 ported rules inrule-registry.ts; the 179 native react-doctor rules carryoriginallyExternal: false.packages/core/src/runners/oxlint/external-plugin-rules.ts— emptied.resolveYouMightNotNeedEffectPluginremoved (the optional peer dep is gone).Verification (latest)
pnpm build— 7/7 packages greenpnpm typecheck— 10/10 packages greenpnpm lint— 0 warnings, 0 errors (966 files)pnpm test— 6,027 / 6,027 passing in oxlint-plugin (0 skipped, 0 failing), 1,385 / 1,386 in react-doctor (1 upstreamtodo: true)Changesets included for
@react-doctor/core,oxlint-plugin-react-doctor,react-doctor.Reviewer notes
Boolean()over!!, magic numbers in named constants, minimal type casts.// HACK:or short "why not what" notes.Branch state
This session's work is on
cursor/port-oxc-react-rules-1778917290(clean rebase + squash onto latestmain). The PR head branch is up to date with verification numbers above.