ESLint

Features

• 2fee9bb feat: export ConfigObject from eslint/config (#21082) (sethamus)

Bug Fixes

• 6b8d2f7 fix: escape reserved characters in rule id in html formatter (#21129) (Francesco Trotta)
• 9091071 fix: prevent no-unreachable-loop crash when all loop types are ignored (#21116) (Pixel)
• e23fafe fix: prefer-object-spread add semicolon when adding parenthesis (#21081) (synthex-byte)
• 20b5ad0 fix: quadratic-time regex in prefer-template (#21096) (Milos Djermanovic)
• 8b6f6c0 fix: apply ignore configs to computed methods in class-methods-use-this (#21094) (Pixel)
• b2c608c fix: NewExpression with parenthesized callee in preserve-caught-error (#21083) (Francesco Trotta)

Documentation

• 6ddf858 docs: fix broken Specify Parser Options anchor link (#21106) (Minsu)
• 784dfbe docs: Clarify no-eq-null description (#21120) (Park Harin)
• 7ec733a docs: Fix typos and grammar in glossary (#21095) (Marry (Subin Yang))
• 92bb13f docs: replace quake link (#21108) (Jung Hyeon Jun)
• 68eb4a5 docs: fix broken Specify Globals anchor links in rule pages (#21103) (Minsu)
• d28f697 docs: replace Code Climate CLI links with Qlty CLI links (#21099) (Jung Hyeon Jun)
• eccc68d docs: correct --suppressions-location option description (#21093) (Ga eun Lee)
• c5963f7 docs: Update README (GitHub Actions Bot)

Chores

• 4fbf46d test: pin webpack version to 5.108.4 (#21137) (Francesco Trotta)
• 2d063e2 chore: update HTTP URLs to HTTPS in JSDoc and comments (#21101) (Bo Hyun Kim)
• eccbe7b test: add error locations to no-class-assign (#21123) (devoil)
• e7d1e43 ci: bump actions/setup-go from 6 to 7 (#21118) (dependabot[bot])
• e9d66d0 ci: bump actions/setup-node from 6 to 7 (#21119) (dependabot[bot])
• ee225b6 test: Add error location details to no-eq-null rule (#21117) (Park Harin)
• 044a627 chore: update minimatch to ^10.2.5 (#21107) (김채영)
• fb09aa8 chore: update ecosystem plugins (#21115) (ESLint Bot)
• 5abd878 test: add error locations to no-proto (#21114) (Gihyeon Jeong / 정기현)
• 9715887 test: Add error location details to no-div-regex (#21110) (Park Harin)
• a746ec6 test: add error locations to no-new-wrappers (#21109) (Gihyeon Jeong / 정기현)
• 8dde645 test: add error locations to no-ex-assign (#21102) (devoil)
• 13ab0ec test: add error locations to no-label-var (#21098) (Gihyeon Jeong / 정기현)
• a99906f test: Add error location details to no-delete-var rule (#21105) (Park Harin)
• c47e8dc chore: add missing backticks to languages/js/index.js (#21104) (beeen)
• 0174428 chore: add missing backticks to translate-cli-options.js (#21097) (dongkyu lee)
• 3d36589 chore: add missing backticks to serialization.js (#21091) (이규환)
• dcc9312 test: add error locations to eqeqeq (#21090) (Ga eun Lee)
• 2710b18 ci: Add explicit permissions to rebuild-docs-sites workflow (#21089) (Marry (Subin Yang))
• 5d2f866 chore: update dependency prettier to v3.9.5 (#21086) (renovate[bot])
• d584e31 chore: fix failing ecosystem test for eslint-plugin-unicorn (#21084) (Francesco Trotta)
• bf3eda0 chore: update ecosystem plugins (#21079) (ESLint Bot)

Features

• cf2a9bf feat: add errorClassNames option to preserve-caught-error rule (#21032) (sethamus)
• f8b873a feat: max-nested-callbacks option for constructor callbacks (#21063) (fnx)
• 557fde8 feat: support computed Number.parseInt member access in radix rule (#21041) (Pixel)
• 0b4a73b feat: add suggestions to no-compare-neg-zero (#21034) (den$)
• 96cdd42 feat: report invalid signed numeric radix values in radix rule (#21030) (Pixel)

Bug Fixes

• 3e7bf15 fix: apply ignoreClassesWithImplements to class expressions (#21069) (Pixel)
• 0d7d70c fix: insert cause outside wrapping parens in preserve-caught-error (#21062) (Mahin Anowar)
• 75ec753 fix: handle static template literals in eqeqeq rule (#21058) (Pixel)
• b717a22 fix: prevent eqeqeq null option from reporting non-equality operators (#21057) (Pixel)
• e35b05f fix: avoid no-invalid-regexp false positive for shadowed RegExp (#21051) (Pixel)
• a3172b6 fix: avoid no-control-regex false positive for shadowed RegExp (#21050) (Pixel)
• d1f637e fix: parenthesize sequence expression operands in no-implicit-coercion (#21045) (spokodev)
• 8859baf fix: avoid prefer-numeric-literals false positive for shadowed globals (#21047) (한국)
• a9e5961 fix: use-isnan false positive on shadowed NaN/Number (#20958) (sethamus)
• 8a240a7 fix: avoid false positives in radix rule for spread arguments (#21044) (Pixel)

Documentation

• c30d808 docs: Update README (GitHub Actions Bot)
• 5139800 docs: document ESLint migration codemods in v9 and v10 guides (#20980) (Alex Bit)
• 04174cb docs: Update README (GitHub Actions Bot)
• 026e130 docs: update semver policy for bug fixes (#21048) (Milos Djermanovic)
• 9d42fef docs: Update README (GitHub Actions Bot)
• b230159 docs: Update README (GitHub Actions Bot)
• 0129972 docs: correct **/.js glob to **/*.js in config files guide (#21036) (EduardF1)

Chores

• 9489379 chore: update dependency @eslint/eslintrc to ^3.3.6 (#21076) (renovate[bot])
• 81a4774 chore: updates for v9.39.5 release (Jenkins)
• 9835414 chore: enable $ExpectType annotations in all TypeScript files (#21071) (Francesco Trotta)
• 72adf6b chore: restrict markdownlint-cli2 updates in renovate (#21067) (lumir)
• 833ec10 chore: update dependency prettier to v3.9.4 (#21061) (renovate[bot])
• 7ea106d chore: update ecosystem plugins (#21059) (ESLint Bot)
• 8fb550e chore: add prettier update commit to .git-blame-ignore-revs (#21056) (lumir)
• e4e1166 chore: update dependency prettier to v3.9.1 (#21055) (renovate[bot])
• 0493f53 chore: update prettier to v3.9.0 (#21054) (Pixel)
• 1056a99 chore: update dependency prettier to v3.8.5 (#21049) (renovate[bot])
• 4d4155d ci: run ecosystem tests on pull requests (#21027) (sethamus)
• 993539f chore: update dependency @eslint/json to ^2.0.1 (#21042) (renovate[bot])
• 53f8b69 test: add error locations to no-constant-binary-expression (#21039) (lumir)
• 5ab71d5 refactor: clean up radix rule internals (#21015) (Pixel)
• a80a9a4 chore: update ecosystem plugins (#21035) (ESLint Bot)
• 7c9a029 ci: add Node.js 26 to CI (#20847) (lumir)

Bug Fixes

• 253be16 fix: handle unavailable require cache (backport of #20812 to v9.x) (#21065) (Eric)

Documentation

• 74930ed docs: switch build to Node.js 24 (#20894) (Milos Djermanovic)
• eaec8bb docs: Add ESLint v9.x EOL notice (#20828) (Milos Djermanovic)

Chores

• 458205f chore: update @eslint/eslintrc and @eslint/js for v9.39.5 (#21077) (Francesco Trotta)
• 202117b chore: package.json update for @eslint/js release (Jenkins)
• d9eb6ed test: disable warning for vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER (#21074) (Francesco Trotta)
• 7b431a7 chore: override re2 dependency for @metascraper/helpers (#21068) (Milos Djermanovic)
• daf7791 chore: pin fflate@0.8.2 (#20895) (Milos Djermanovic)
• daee8ba ci: use pnpm in eslint-flat-config-utils type integration test (#20829) (Milos Djermanovic)
• 116d4be ci: unpin Node.js 25.x in CI (#20619) (Copilot)

Features

• b1f9106 feat: detect Symbol() and BigInt() in no-constant-binary-expression (#20981) (Taejin Kim)
• f291007 feat: add checkRelationalComparisons to no-constant-binary-expression (#20948) (sethamus)

Bug Fixes

• 6b05784 fix: prefer-exponentiation-operator invalid autofix at statement start (#20997) (Milos Djermanovic)
• bb9eb2a fix: account for shadowed Boolean in no-extra-boolean-cast (#21013) (den$)
• 8fd8741 fix: don't report shadowed undefined in radix rule (#21011) (Pixel)
• 5784980 fix: don't report shadowed undefined in no-throw-literal (#21010) (Pixel)
• 9cd1e6d fix: suppress invalid class suggestion in no-promise-executor-return (#21008) (Pixel)
• d4eb2dc fix: don't report shadowed undefined in prefer-promise-reject-errors (#21006) (Pixel)
• 2360464 fix: prefer-promise-reject-errors false positives for shadowed Promise (#21003) (den$)
• 63d52d2 fix: restore max-classes-per-file report range (#21002) (Pixel)
• 7feaff0 fix: callback detection logic for IIFEs in max-nested-callbacks (#20979) (fnx)
• 399a2ec fix: don't report inner non-callbacks in max-nested-callbacks (#20995) (Milos Djermanovic)

Documentation

• a83683d docs: Update README (GitHub Actions Bot)
• f5449f9 docs: document userland patterns for global assertionOptions in RuleT… (#20986) (playgirl)
• bea49f7 docs: Update README (GitHub Actions Bot)
• e5f70f9 docs: update code-path diagrams (#20984) (Tanuj Kanti)
• 8890c2d docs: add TypeScript config guidance for MCP server (#20796) (Pierluigi Lenoci)
• 3eb3d9b docs: Update README (GitHub Actions Bot)
• c5bb59c docs: Update README (GitHub Actions Bot)
• eb3c97c docs: fix grammar in prefer-const rule description (#20983) (lumir)

Chores

• 6a42034 ci: run ecosystem tests on main branch (#20891) (sethamus)
• 3dbacdb ci: bump actions/checkout from 6 to 7 (#21014) (dependabot[bot])
• c3abfca chore: correct JSDoc param types in html formatter (#21018) (Minseon Kim)
• a832320 ci: split ecosystem tests into separate jobs (#21001) (xbinaryx)
• 27166e7 chore: update ecosystem plugins (#21005) (ESLint Bot)
• 865d76e ci: bump pnpm/action-setup from 6.0.8 to 6.0.9 (#20989) (dependabot[bot])
• 27a88c9 chore: update dependency markdown-it to v14 in root (#20994) (Milos Djermanovic)
• 970cea6 chore: update dependency markdown-it to v14 (#20993) (Milos Djermanovic)
• b482120 chore: update dependency prettier to v3.8.4 (#20990) (renovate[bot])
• 6993fb3 chore: update ecosystem plugins (#20985) (ESLint Bot)

Features

• 5ca8c52 feat: correct stack tracking in max-nested-callbacks (#20973) (Pixel998)
• b565783 feat: report no-with violations at the with keyword (#20971) (Pixel998)
• 2ce032f feat: report max-lines-per-function violations at function head (#20966) (Pixel998)
• 732cb3e feat: report max-nested-callbacks violations at function head (#20967) (Pixel998)
• f9c138a feat: report max-depth violations on keywords (#20943) (Pixel998)
• bdb496c feat: correct max-depth handling for else-if chains (#20944) (Pixel998)
• c296873 feat: update error loc in max-statements to function header (#20907) (Taejin Kim)

Documentation

• 8ae1b5b docs: Update README (GitHub Actions Bot)
• ca7eb90 docs: update Node.js prerequisites to include ICU support (#20962) (Francesco Trotta)
• f99b47a docs: Update README (GitHub Actions Bot)
• acf03d4 docs: clarify precedence of parserOptions over languageOptions (#20926) (sethamus)

Chores

• b18bf58 chore: update ecosystem plugins (#20959) (ESLint Bot)
• c2d1444 refactor: replace areAllSegmentsUnreachable with !isAnySegmentReachable (#20951) (Taejin Kim)
• 243b8c5 chore: enhance config-rule to support oneOf, anyOf, and nested schemas (#20788) (kuldeep kumar)
• 217b2a9 test: add unit tests for ParserService (#20949) (Taejin Kim)
• 72003e7 test: add location information to error messages in max-statements (#20945) (lumir)
• 7797c26 refactor: deduplicate isAnySegmentReachable across rules (#20890) (Taejin Kim)
• 67c46fa chore: update ecosystem plugins (#20938) (ESLint Bot)
• 95d8c7a chore: update dependency @eslint/json to v2 (#20934) (renovate[bot])
• cf9e496 chore: update @arethetypeswrong/cli to 0.18.3 (#20933) (Pixel998)
• fb6d396 test: run type tests with TypeScript 7 (#20868) (sethamus)

Bug Fixes

• e557467 fix: update @eslint/plugin-kit version to 0.7.2 (#20930) (Francesco Trotta)
• d4ce898 fix: propagate failures from delegated commands (#20917) (Minh Vu)
• f4f3507 fix: prefer-arrow-callback invalid autofix with newline after async (#20916) (kuldeep kumar)
• c5bc78b fix: false positive for reference in finally block (#20655) (Tanuj Kanti)
• 27538c0 fix: add missing CodePath and CodePathSegment types (#20853) (Pixel998)

Documentation

• 61b0add docs: remove deprecated rule from related rules of max-params (#20921) (Tanuj Kanti)
• 305d5b9 docs: remove deprecated rules from related rules section (#20911) (Tanuj Kanti)
• 49b0202 docs: fix display: none of ad (#20901) (Tanuj Kanti)
• 9067f94 docs: switch build to Node.js 24 (#20893) (Milos Djermanovic)
• c91b041 docs: Update README (GitHub Actions Bot)
• e349265 docs: clarify semver strings in rule deprecation objects (#20885) (Milos Djermanovic)

Chores

• b0e466b test: add data property to invalid tests cases for rules (#20924) (Tanuj Kanti)
• f78838b test: add CodePath type coverage (#20904) (Pixel998)
• 1daa4bd chore: update eslint-plugin-eslint-comments test data to latest commit (#20922) (Francesco Trotta)
• 002942c ci: declare contents:read on update-readme workflow (#20919) (Arpit Jain)
• 64bca24 chore: update ecosystem plugins (#20912) (ESLint Bot)
• 6d7c832 chore: ignore fflate updates in renovate (#20908) (Pixel998)
• b2c8638 ci: bump pnpm/action-setup from 6.0.7 to 6.0.8 (#20889) (dependabot[bot])
• a9b8d7f chore: increase maxBuffer for ecosystem tests (#20881) (sethamus)
• b702ead chore: update ecosystem update PR settings (#20884) (Pixel998)
• 507f60e chore: update ecosystem plugins (#20882) (ESLint Bot)
• 92f5c5b test: add unit test for message-count (#20878) (kuldeep kumar)
• df32108 chore: add @eslint/markdown and typescript-eslint ecosystem tests (#20837) (sethamus)
• 327f91d chore: use includeIgnoreFile internally (#20876) (Kirk Waiblinger)
• f0dc4bd chore: pin fflate@0.8.2 (#20877) (Milos Djermanovic)
• 0f4bd25 ci: run Discord alert for ecosystem test failures (#20873) (Copilot)

Features

• 1a45ec5 feat: check sequence expressions in for-direction (#20701) (kuldeep kumar)
• 450040b feat: add includeIgnoreFile() to eslint/config (#20735) (Kirk Waiblinger)

Bug Fixes

• 544c0c3 fix: escape code path DOT labels in debug output (#20866) (Pixel998)
• 6799431 fix: update dependency @eslint/config-helpers to ^0.6.0 (#20850) (renovate[bot])
• f078fef fix: handle non-array deprecated rule replacements (#20825) (xbinaryx)

Documentation

• 7e52a71 docs: add mention of @eslint-react/eslint-plugin (#20869) (Pavel)
• db3468b docs: tweak wording around ambiguous CJS-vs-ESM config (#20865) (Kirk Waiblinger)
• 9084664 docs: Update README (GitHub Actions Bot)
• 9cc7387 docs: Update README (GitHub Actions Bot)
• 3d7b548 docs: Update README (GitHub Actions Bot)
• 191ec3c docs: Update README (GitHub Actions Bot)

Chores

• 6616856 chore: upgrade knip to v6 (#20875) (Pixel998)
• d13b084 ci: ensure auto-created PRs run CI (#20860) (lumir)
• e71c7af ci: bump pnpm/action-setup from 6.0.5 to 6.0.7 (#20862) (dependabot[bot])
• d84393d test: add unit tests for SuppressionsService.applySuppressions() (#20863) (kuldeep kumar)
• 24db8cb test: add tests for SuppressionsService.save() (#20802) (kuldeep kumar)
• 2ef0549 chore: update ecosystem plugins (#20857) (github-actions[bot])
• a429791 ci: remove eslint-webpack-plugin types integration test (#20668) (Milos Djermanovic)
• 9e37386 chore: replace recast with range approach in code-sample-minimizer (#20682) (Copilot)
• 0dd1f9f test: disable warning for vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER (#20845) (Francesco Trotta)
• 9da3c7b refactor: remove deprecated meta.language and migrate meta.dialects (#20716) (Pixel998)
• 2099ed1 refactor: add meta.defaultOptions to more rules, enable linting (#20800) (xbinaryx)
• f1dfbc9 chore: update ecosystem plugins (#20836) (github-actions[bot])
• c759413 ci: bump pnpm/action-setup from 6.0.3 to 6.0.5 (#20843) (dependabot[bot])
• 5b817d6 test: add unit tests for lib/shared/ast-utils (#20838) (kuldeep kumar)
• 1c13ae3 test: add unit tests for lib/shared/severity (#20835) (kuldeep kumar)

Features

• 379571a feat: add suggestions for no-unused-private-class-members (#20773) (sethamus)

Bug Fixes

• b6ae5cf fix: handle unavailable require cache (#20812) (Simon Podlipsky)
• 6fb3685 fix: rule suggestions cause continuation in class body (#20787) (Milos Djermanovic)

Documentation

• 32cc7ab docs: fix typos in docs and comments (#20809) (Tanuj Kanti)
• 7f47937 docs: Update README (GitHub Actions Bot)

Chores

• d32235e ci: use pnpm in eslint-flat-config-utils type integration test (#20826) (Francesco Trotta)
• 3ffb14e chore: clean up typos in comments and JSDoc (#20821) (Pixel998)
• 22eb58a chore: add missing continue-on-error to ecosystem-tests.yml (#20818) (Josh Goldberg ✨)
• 88bf002 ci: bump pnpm/action-setup from 6.0.1 to 6.0.3 (#20815) (dependabot[bot])
• 97c8c33 chore: update ilshidur/action-discord action to v0.4.0 (#20811) (renovate[bot])
• 2f58136 chore: pin peter-evans/create-pull-request action to 5f6978f (#20810) (renovate[bot])
• 77add7f chore: add initial ecosystem plugin tests workflow (#19643) (Josh Goldberg ✨)
• 4023b55 test: Add unit tests for SuppressionsService.prune() (#20797) (kuldeep kumar)
• 54080da test: add unit tests for ForkContext (#20778) (kuldeep kumar)
• f0e2bcc test: add unit tests for SuppressionsService.suppress() method (#20765) (kuldeep kumar)
• a7f0b94 chore: update dependency prettier to v3.8.3 (#20782) (renovate[bot])
• 7bf93d9 chore: update TypeScript to v6 (#20677) (sethamus)
• b42dd72 ci: bump pnpm/action-setup from 6.0.0 to 6.0.1 (#20781) (dependabot[bot])
• 2b252be test: add unit tests for IdGenerator (#20775) (kuldeep kumar)

Bug Fixes

• 14be92b fix: model generator yield resumption paths in code path analysis (#20665) (sethamus)
• 84a19d2 fix: no-async-promise-executor false positives for shadowed Promise (#20740) (xbinaryx)
• af764af fix: clarify language and processor validation errors (#20729) (Pixel998)
• e251b89 fix: update eslint (#20715) (renovate[bot])

Documentation

• ca92ca0 docs: reuse markdown-it instance for markdown filter (#20768) (Amaresh S M)
• 57d2ee2 docs: Enable Eleventy incremental mode for watch (#20767) (Amaresh S M)
• c1621b9 docs: fix typos in code-path-analyzer.js (#20700) (Ayush Shukla)
• 1418d52 docs: Update README (GitHub Actions Bot)
• 39771e6 docs: Update README (GitHub Actions Bot)
• 71e0469 docs: fix incomplete JSDoc param description in no-shadow rule (#20728) (kuldeep kumar)
• 22119ce docs: clarify scope of for-direction rule with dead code examples (#20723) (Amaresh S M)
• 8f3fb77 docs: document meta.docs.dialects (#20718) (Pixel998)

Chores

• 7ddfea9 chore: update dependency prettier to v3.8.2 (#20770) (renovate[bot])
• fac40e1 ci: bump pnpm/action-setup from 5.0.0 to 6.0.0 (#20763) (dependabot[bot])
• 7246f92 test: add tests for SuppressionsService.load() error handling (#20734) (kuldeep kumar)
• 4f34b1e chore: update pnpm/action-setup action to v5 (#20762) (renovate[bot])
• 51080eb test: processor service (#20731) (kuldeep kumar)
• e7e1889 chore: remove stale babel-eslint10 fixture and test (#20727) (kuldeep kumar)
• 4e1a87c test: remove redundant async/await in flat config array tests (#20722) (Pixel998)
• 066eabb test: add rule metadata coverage for languages and docs.dialects (#20717) (Pixel998)

Features

• 586ec2f feat: Add meta.languages support to rules (#20571) (Copilot)
• 14207de feat: add Temporal to no-obj-calls (#20675) (Pixel998)
• bbb2c93 feat: add Temporal to ES2026 globals (#20672) (Pixel998)

Bug Fixes

• 542cb3e fix: update first-party dependencies (#20714) (Francesco Trotta)

Documentation

• a2af743 docs: add language to configuration objects (#20712) (Francesco Trotta)
• 845f23f docs: Update README (GitHub Actions Bot)
• 5fbcf59 docs: remove sourceType from ts playground link (#20477) (Tanuj Kanti)
• 8702a47 docs: Update README (GitHub Actions Bot)
• ddeaded docs: Update README (GitHub Actions Bot)
• 2b44966 docs: add Major Releases section to Manage Releases (#20269) (Milos Djermanovic)
• eab65c7 docs: update eslint versions in examples (#20664) (루밀LuMir)
• 3e4a299 docs: update ESM Dependencies policies with note for own-usage packages (#20660) (Milos Djermanovic)

Chores

• 8120e30 refactor: extract no unmodified loop condition (#20679) (kuldeep kumar)
• 46e8469 chore: update dependency markdownlint-cli2 to ^0.22.0 (#20697) (renovate[bot])
• 01ed3aa test: add unit tests for unicode utilities (#20622) (Manish chaudhary)
• 811f493 ci: remove --legacy-peer-deps from types integration tests (#20667) (Milos Djermanovic)
• 6b86fcf chore: update dependency npm-run-all2 to v8 (#20663) (renovate[bot])
• 632c4f8 chore: add prettier update commit to .git-blame-ignore-revs (#20662) (루밀LuMir)
• b0b0f21 chore: update dependency eslint-plugin-regexp to ^3.1.0 (#20659) (Milos Djermanovic)
• 228a2dd chore: update dependency eslint-plugin-eslint-plugin to ^7.3.2 (#20661) (Milos Djermanovic)
• 3ab4d7e test: Add tests for eslintrc-style keys (#20645) (kuldeep kumar)