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feat(linter): implement fixer for unicorn/no-instanceof-builtins#19371

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Feb 13, 2026
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feat(linter): implement fixer for unicorn/no-instanceof-builtins#19371
graphite-app[bot] merged 1 commit intomainfrom
c/12-14-feat_linter_no-instanceof-builtins_implement_fixer

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@camc314 camc314 commented Feb 13, 2026

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@camc314 camc314 self-assigned this Feb 13, 2026
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camc314 commented Feb 13, 2026


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@camc314 camc314 marked this pull request as ready for review February 13, 2026 17:38
Copilot AI review requested due to automatic review settings February 13, 2026 17:38
@github-actions github-actions bot added A-linter Area - Linter C-enhancement Category - New feature or request labels Feb 13, 2026
@camc314 camc314 changed the title feat(linter/no-instanceof-builtins): implement fixer feat(linter): implement fixer for unicorn/no-instanceof-builtins Feb 13, 2026
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Pull request overview

This PR adds a suggestion-based auto-fixer for the unicorn/no-instanceof-builtins lint rule, enabling automated rewrites of certain instanceof checks to realm-safe alternatives.

Changes:

  • Enable suggestion fix capability for the rule (switch to conditional_suggestion).
  • Implement suggested fixes for Array, Function, primitive wrapper constructors, and optional Error.isError(...).
  • Add fixer test cases via Tester::expect_fix(...).

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codspeed-hq bot commented Feb 13, 2026

Merging this PR will not alter performance

✅ 47 untouched benchmarks
⏩ 3 skipped benchmarks1


Comparing c/12-14-feat_linter_no-instanceof-builtins_implement_fixer (a519b33) with main (cc00a59)

Open in CodSpeed

Footnotes

  1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

@camc314 camc314 added the 0-merge Merge with Graphite Merge Queue label Feb 13, 2026
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camc314 commented Feb 13, 2026

Merge activity

@graphite-app graphite-app bot force-pushed the c/12-14-feat_linter_no-instanceof-builtins_implement_fixer branch from a519b33 to c5f3194 Compare February 13, 2026 17:50
@graphite-app graphite-app bot force-pushed the c/12-14-feat_linter_no-instanceof-builtins_implement_fixer branch from c5f3194 to 80b002a Compare February 13, 2026 17:52
@graphite-app graphite-app bot merged commit 80b002a into main Feb 13, 2026
21 checks passed
@graphite-app graphite-app bot deleted the c/12-14-feat_linter_no-instanceof-builtins_implement_fixer branch February 13, 2026 17:57
@graphite-app graphite-app bot removed the 0-merge Merge with Graphite Merge Queue label Feb 13, 2026
camc314 pushed a commit that referenced this pull request Feb 16, 2026
# Oxlint
### 💥 BREAKING CHANGES

- 7711821 oxlint: [**BREAKING**] `no-shadow-restricted-names` report
`globalThis` by default (#19407) (Sysix)

### 🚀 Features

- ce1baa0 linter: Implement eslint/no-shadow (#18979) (Víctor Fernández)
- 7a333c1 linter: Support dynamic configs via CLI arguments (#19384)
(camc314)
- 1bf569b linter: Implement typescript/unified-signatures (#19375)
(camc314)
- 6562a9b linter: Implement typescript/parameter-properties (#19374)
(camc314)
- 94d8d74 linter: Implement typescript/no-use-before-define (#19373)
(camc314)
- 80b002a linter: Implement fixer for unicorn/no-instanceof-builtins
(#19371) (camc314)
- 5c3784b linter: Implement eslint/no-unmodified-loop-condition (#19341)
(Vincent R)
- cc00a59 linter/const-comparisons: Improve diagnostics when mixing
logical/comparison operators (#19370) (camc314)
- ea2c401 linter: Add support for no constructed context values (#18067)
(Jovi De Croock)
- f2440eb linter: Mark eslint/no-return-assign as having no fixer
(#19327) (camc314)
- 8588670 linter/unicorn: Implement suggestion for
`unicorn/no-await-in-promise-methods` rule (#19359) (Mikhail Baev)
- f0af965 linter: Move `jsx-a11y/no-static-element-interactions` rule
out of the nursery. (#19355) (connorshea)
- be0ce50 linter/tsgolint: Add support for labeled ranges in tsgolint
diagnostics (#19201) (camchenry)
- b5bc900 linter: Implement fixer for unicorn/no-new-buffer (#19326)
(camc314)
- 1612932 linter: Add typescript/no-unnecessary-condition (#19130)
(camc314)
- 37dc6c5 linter: Implement fixer for unicorn/prefer-includes (#19323)
(camc314)

### 🐛 Bug Fixes

- c2b1870 linter: Enforce config options for `react/forbid-dom-props`
rule. (#19387) (connorshea)
- 3d24e44 linter: Honor no-empty-function allow getters/setters for
object literals (#19393) (camc314)
- bbced8d linter: Enforce config options for `eslint/no-empty-function`
rule, improve docs. (#19390) (connorshea)
- 6bc8aec linter: Fix the behavior of `import/extensions` rule for a
file that has multiple extensions. (#18919) (connorshea)
- c62a295 linter/img-redundant-alt: Enforce whole-word matching for
redundant alt text (#19367) (camc314)
- 98956fe linter/describe-function-title: Skip autofix for type-only
imports (#19329) (camc314)
- d96d26d linter/plugins: Provide `parser.version` (#19364)
(overlookmotel)
- 81f0039 linter_codegen: Compute rule IDs relative to previous rule
(#19350) (camchenry)
- b7ef0a8 linter/consistent-indexed-object-style: Avoid unsafe Record
conversions for mapped types (#19320) (camc314)

### 📚 Documentation

- 3a6059f linter: Improve docs for `eslint/require-await` rule. (#19361)
(connorshea)
- b069269 linter/plugins: Add comment about deprecated `ScopeManager`
methods (#19363) (overlookmotel)
- 2d8aaf9 linter: Disable formatting for `eslint/no-unsafe-negation`
examples. (#19347) (connorshea)
- fb87806 linter: Ensure that we do not auto-format the docs for
`unicorn/number-literal-case` rule. (#19346) (connorshea)
- 8d3ae27 linter/typescript: Skip docs for deprecated type aware rule
options (#19324) (camc314)
# Oxfmt
### 💥 BREAKING CHANGES

- 00135b5 formatter/sort_imports: [**BREAKING**] Change default `groups`
order (#19427) (leaysgur)
- 9c34f72 formatter/sort_imports: [**BREAKING**] Report invalid group
name with renaming `side-effect` > `side_effect` (#19416) (leaysgur)

### 🚀 Features

- 4baebef formatter/sort_imports: Support `{ newlinesBetween: bool }`
inside `groups` (#19358) (leaysgur)
- d1c2fb6 formatter/sort_imports: Support `customGroups`
attributes(`selector` and `modifiers`) (#19356) (leaysgur)

### 🐛 Bug Fixes

- f084ea6 oxfmt: Explicitly pass `process.env` for the forked process
(#19380) (Long Ho)
- 2bc7a14 formatter: Arrow function body incorrectly broken when return
type has comment (#19368) (Dunqing)
- 90ec3d2 oxfmt: Update tailwind plugin which fixes crash on non-js file
(#19353) (leaysgur)
- e9c5b1e formatter: Treat `PrivateFieldExpression` as simple call
argument (#19348) (Dunqing)
- 80643d5 formatter: Match Prettier union indentation with leading
comments (#19271) (Dunqing)

### ⚡ Performance

- c169c77 syntax: Optimize `is_identifier_name_patched` (#19386)
(sapphi-red)
OskarLebuda pushed a commit to OskarLebuda/oxc that referenced this pull request Feb 17, 2026
# Oxlint
### 💥 BREAKING CHANGES

- 7711821 oxlint: [**BREAKING**] `no-shadow-restricted-names` report
`globalThis` by default (oxc-project#19407) (Sysix)

### 🚀 Features

- ce1baa0 linter: Implement eslint/no-shadow (oxc-project#18979) (Víctor Fernández)
- 7a333c1 linter: Support dynamic configs via CLI arguments (oxc-project#19384)
(camc314)
- 1bf569b linter: Implement typescript/unified-signatures (oxc-project#19375)
(camc314)
- 6562a9b linter: Implement typescript/parameter-properties (oxc-project#19374)
(camc314)
- 94d8d74 linter: Implement typescript/no-use-before-define (oxc-project#19373)
(camc314)
- 80b002a linter: Implement fixer for unicorn/no-instanceof-builtins
(oxc-project#19371) (camc314)
- 5c3784b linter: Implement eslint/no-unmodified-loop-condition (oxc-project#19341)
(Vincent R)
- cc00a59 linter/const-comparisons: Improve diagnostics when mixing
logical/comparison operators (oxc-project#19370) (camc314)
- ea2c401 linter: Add support for no constructed context values (oxc-project#18067)
(Jovi De Croock)
- f2440eb linter: Mark eslint/no-return-assign as having no fixer
(oxc-project#19327) (camc314)
- 8588670 linter/unicorn: Implement suggestion for
`unicorn/no-await-in-promise-methods` rule (oxc-project#19359) (Mikhail Baev)
- f0af965 linter: Move `jsx-a11y/no-static-element-interactions` rule
out of the nursery. (oxc-project#19355) (connorshea)
- be0ce50 linter/tsgolint: Add support for labeled ranges in tsgolint
diagnostics (oxc-project#19201) (camchenry)
- b5bc900 linter: Implement fixer for unicorn/no-new-buffer (oxc-project#19326)
(camc314)
- 1612932 linter: Add typescript/no-unnecessary-condition (oxc-project#19130)
(camc314)
- 37dc6c5 linter: Implement fixer for unicorn/prefer-includes (oxc-project#19323)
(camc314)

### 🐛 Bug Fixes

- c2b1870 linter: Enforce config options for `react/forbid-dom-props`
rule. (oxc-project#19387) (connorshea)
- 3d24e44 linter: Honor no-empty-function allow getters/setters for
object literals (oxc-project#19393) (camc314)
- bbced8d linter: Enforce config options for `eslint/no-empty-function`
rule, improve docs. (oxc-project#19390) (connorshea)
- 6bc8aec linter: Fix the behavior of `import/extensions` rule for a
file that has multiple extensions. (oxc-project#18919) (connorshea)
- c62a295 linter/img-redundant-alt: Enforce whole-word matching for
redundant alt text (oxc-project#19367) (camc314)
- 98956fe linter/describe-function-title: Skip autofix for type-only
imports (oxc-project#19329) (camc314)
- d96d26d linter/plugins: Provide `parser.version` (oxc-project#19364)
(overlookmotel)
- 81f0039 linter_codegen: Compute rule IDs relative to previous rule
(oxc-project#19350) (camchenry)
- b7ef0a8 linter/consistent-indexed-object-style: Avoid unsafe Record
conversions for mapped types (oxc-project#19320) (camc314)

### 📚 Documentation

- 3a6059f linter: Improve docs for `eslint/require-await` rule. (oxc-project#19361)
(connorshea)
- b069269 linter/plugins: Add comment about deprecated `ScopeManager`
methods (oxc-project#19363) (overlookmotel)
- 2d8aaf9 linter: Disable formatting for `eslint/no-unsafe-negation`
examples. (oxc-project#19347) (connorshea)
- fb87806 linter: Ensure that we do not auto-format the docs for
`unicorn/number-literal-case` rule. (oxc-project#19346) (connorshea)
- 8d3ae27 linter/typescript: Skip docs for deprecated type aware rule
options (oxc-project#19324) (camc314)
# Oxfmt
### 💥 BREAKING CHANGES

- 00135b5 formatter/sort_imports: [**BREAKING**] Change default `groups`
order (oxc-project#19427) (leaysgur)
- 9c34f72 formatter/sort_imports: [**BREAKING**] Report invalid group
name with renaming `side-effect` > `side_effect` (oxc-project#19416) (leaysgur)

### 🚀 Features

- 4baebef formatter/sort_imports: Support `{ newlinesBetween: bool }`
inside `groups` (oxc-project#19358) (leaysgur)
- d1c2fb6 formatter/sort_imports: Support `customGroups`
attributes(`selector` and `modifiers`) (oxc-project#19356) (leaysgur)

### 🐛 Bug Fixes

- f084ea6 oxfmt: Explicitly pass `process.env` for the forked process
(oxc-project#19380) (Long Ho)
- 2bc7a14 formatter: Arrow function body incorrectly broken when return
type has comment (oxc-project#19368) (Dunqing)
- 90ec3d2 oxfmt: Update tailwind plugin which fixes crash on non-js file
(oxc-project#19353) (leaysgur)
- e9c5b1e formatter: Treat `PrivateFieldExpression` as simple call
argument (oxc-project#19348) (Dunqing)
- 80643d5 formatter: Match Prettier union indentation with leading
comments (oxc-project#19271) (Dunqing)

### ⚡ Performance

- c169c77 syntax: Optimize `is_identifier_name_patched` (oxc-project#19386)
(sapphi-red)
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