💥 BREAKING CHANGES

• a31567a allocator: [BREAKING] Make Allocator::cursor_ptr and data_end_ptr private (#26081) (overlookmotel)

🚀 Features

• 115955d minifier: Drop cases whose condition is statically false (#26172) (Armano)
• 784e9fa minifier: Invert !0 and !1 in place for boolean context to 1 and 0 (#26050) (Armano)
• 1e902cc minifier: Expand fold leading assignments into the var decl (#26142) (Armano)
• 3ed4f6a minifier: Expand de morgan's optimization to allow move of ! (#25930) (Armano)
• 5672585 parser: Attach all comments to nodes (#25944) (camc314)

🐛 Bug Fixes

• a3d33dd semantic: Skip body bindings in type parameters and this param (#26169) (Dunqing)
• 4adfb4c semantic: Validate chained continue labels (#26157) (camc314)
• b874f48 ecmascript: Math.round only exact half ties (#26150) (camc314)
• a625378 minifier: Coerce omitted indexOf search argument (#26149) (camc314)
• dc7398b ecmascript: Trim trailing whitespace in string to number (#26148) (camc314)
• 243b685 transformer/object-rest: Lower multiple declarators correctly (#26147) (camc314)
• dc09a3a parser: Avoid panic on escaped string export names (#26146) (camc314)
• e412cf2 linter: Clamp invalid JS plugin locations (#26144) (camc314)
• c3dedc9 semantic: Skip function body bindings in parameters (#26099) (Dunqing)
• e74de61 transform-react: Match Babel diagnostic reporting (#26128) (Boshen)
• d5163d0 parser: Correctly classify unapplied pure annotations (#26084) (camc314)
• 8531b9b linter/plugins: Alter method for obtaining mutable Program when sending AST to JS plugins (#26077) (overlookmotel)
• 9b51658 regular_expression: Allow oversized decimal escape for Annex B (#26070) (leaysgur)
• c8de4df regular_expression: Reject oversized backreferences (#26055) (camc314)

⚡ Performance

• ac4785a diagnostics: Use fixed ANSI styles (#26130) (Boshen)
• 07a0793 packages/codegen: Flatten output in chunks (#26109) (overlookmotel)
• 487427a packages/codegen: Faster string flattening (#26108) (overlookmotel)
• 7785583 packages/codegen: Ensure indent strings are flattened (#26107) (overlookmotel)
• 0dd4db3 packages/codegen: Store mapping positions in an Int32Array (#26085) (overlookmotel)

Table of Contents

• Oxlint v1.81.0
• Oxfmt v0.66.0

Oxlint v1.81.0

🚀 Features

• 60b945d linter/nextjs/no-typos: Implement suggestion (#26091) (Mikhail Baev)

🐛 Bug Fixes

• 33ac4b0 linter/lsp: Prevent tsgolint from holding onto processes (#25570) (Adrian Schaedle)
• baf4b1e linter/import/no-empty-named-blocks: Make empty value import removal a suggestion (#26155) (camc314)
• 77cfaec linter/eslint/object-shorthand: Preserve __proto__ semantics (#26154) (camc314)
• fa3c082 linter/unicorn/prefer-set-size: Ignore shadowed Set constructors (#26153) (camc314)
• e412cf2 linter: Clamp invalid JS plugin locations (#26144) (camc314)
• d86c113 linter: Normalize reversed JS plugin locations (#26138) (camc314)
• 73c09b2 linter/eslint/no-use-before-define: Run on JS, JSX files (#26114) (camc314)
• 03ef0f2 linter/unicorn/no-useless-spread: Treat typed arrays as a distinct value hint (#26067) (Aadharsh Pannirselvam)
• bd15905 linter/react/no-unstable-nested-components: Check nested component object property names (#26101) (camc314)
• 3910e2b linter/eslint/no-unassigned-vars: Skip Svelte and Vue files (#26042) (Hamody We)
• 047f7ca linter/plugins: Fix interaction between JS plugins and Vue rules (#26080) (overlookmotel)
• 8531b9b linter/plugins: Alter method for obtaining mutable Program when sending AST to JS plugins (#26077) (overlookmotel)
• dc464ff linter/unicorn/prefer-math-min-max: Avoid unsafe autofix (#26060) (camc314)

📚 Documentation

• 464ddd1 linter: Support a shared short description for jest/vitest rules (#26186) (connorshea)
• 9db5ad3 linter: Add short description to vue/no-dupe-keys (#26183) (connorshea)
• db66f58 linter: Correct export/import mismatch in bar and foo example (#25927) (billychannnnnn)
• d5be037 linter/typescript/switch-exhaustiveness-check: Clarify default case comment pattern (#26100) (camc314)

Oxfmt v0.66.0

🚀 Features

• 1fb37b6 formatter/css: Format declaration-shaped raw-prelude rules (postcss nested config blocks) (#26194) (leaysgur)

🐛 Bug Fixes

• 9f81002 formatter: Re-add suppressed statement terminators per options.semi (#26220) (leaysgur)
• 769ffd5 formatter: Print suppressed typecast parens (#26218) (leaysgur)
• 5ff57f8 formatter/sort-imports: Handle custom side effect groups (#26217) (leaysgur)
• 2f4d759 formatter: Do not skip cast comment lookup (#26216) (leaysgur)
• 1213e12 formatter: Preserve comment for statement terminators and binary casts (#26213) (leaysgur)
• 57e8e22 formatter_css: Space a folded sign after a call in Less operations (#26134) (leaysgur)
• e4298fb formatter/jsdoc: Follow CommonMark for interrupting lists and guard wrapping from creating them (#26098) (leaysgur)
• a1e21c2 formatter: Apply head body policy everywhere (#26074) (leaysgur)
• 676b7e1 formatter: Keep comments in their for-head slot, before an empty-statement body and do-while (#26073) (leaysgur)
• 3bbcea6 formatter: Keep comments between a head and its body out of the braces across all constructs (#26071) (leaysgur)
• 57537a2 formatter: Place comments between a head and open paren (#26058) (leaysgur)
• e2d53e7 formatter: Place comments between a statement head and its body (#26043) (leaysgur)
• 662556c formatter: Print the idempotent placement for comments in dropped parens (#26041) (leaysgur)
• faf11d9 formatter_yaml: Keep trailing whitespace in block scalars (#26072) (leaysgur)

⚡ Performance

• ac4785a diagnostics: Use fixed ANSI styles (#26130) (Boshen)

📚 Documentation

• b879608 formatter,formatter_graphql,formatter_yaml: Annotate own-line comment inlining as known policy violation (#26131) (leaysgur)
• 181953b oxfmt,formatter_core,formatter,formatter_yaml,formatter_css,formatter_graphql: Extract DIVERGENCES.md out from AGENTS.md (#26121) (leaysgur)
• a67cb9d formatter,formatter_core: Document comment moving policy (#26075) (leaysgur)
• fc175b0 formatter_core: Clarify idempotency test infra (#26069) (leaysgur)

🚀 Features

• b6e9e5e minifier: Fold switch stmt whose parent is not block stmt (#25403) (Armano)

🐛 Bug Fixes

• 8db1053 codegen: Require sourcemap for example (#26047) (camc314)
• 8a9bdbd estree: Include decorators in FormalParameterRest spans (#26021) (camc314)
• 6f0c7cf minifier: Avoid merging if to for in sloppy mode when containing function declaration (#25638) (sapphi-red)
• 2cde1f6 rust: Address nightly deprecations (#25998) (Boshen)
• 6c5ad1b codegen: Only add mapping names for PrivateIdentifiers which have changed (#25958) (overlookmotel)
• 2dad1e0 parser: Track irregular line terminators in trivia (#25947) (camc314)
• 58ba651 minifier: Avoid merging if to for when the body contains a function declaration (#25637) (sapphi-red)
• a185ac3 codegen: Print # before private identifier in TS signature key (#25938) (overlookmotel)
• af82a07 minifier: Keep unary + when the other operand has side effects (#25645) (Kotaro Chikuba)

⚡ Performance

• 20711f4 packages/codegen: Remove node param from write and markMap functions in sourcemap builds (#25989) (overlookmotel)
• 29a7749 packages/codegen: Pass start and end to write and mark functions (#25986) (overlookmotel)
• 8ae741b packages/codegen: Replace write calls with writeIdent (#25984) (overlookmotel)
• a78ed30 packages/codegen: Remove last param from writeWithMapNamed (#25983) (overlookmotel)
• 53f6270 packages/codegen: Eagerly initialize mapNames (#25979) (overlookmotel)
• 5b43c60 packages/codegen: Split recording mappings into multiple functions (#25978) (overlookmotel)
• cc947b5 packages/codegen: Reduce property lookups (#25977) (overlookmotel)
• c22a9cc packages/codegen: Combine condition checks (#25976) (overlookmotel)
• 215a6a5 packages/codegen: Add functions for writing/marking unnamed mappings (#25975) (overlookmotel)
• fe444cc codegen: Avoid allocations for single comment anchors (#25598) (camc314)
• a0aee81 minifier: Do not rebuild expression when substituting void to null (#25964) (Armano)
• 1004439 packages/codegen: Merge mark and write calls in printImportAttributes (#25972) (overlookmotel)
• 94c8a34 packages/codegen: Remove node param from printString and printNonNegativeFloat (#25971) (overlookmotel)
• 7e2b4b3 packages/codegen: printNonNegativeFloat write mapping directly (#25968) (overlookmotel)
• f09c8ab minifier: Avoid creation of unnecessary conditional expressions (#25931) (Armano)
• 53ff080 packages/codegen: Remove lastWasPostfixClose (#25888) (overlookmotel)

📚 Documentation

• 07de646 packages/codegen: Fix JSDoc comments on write* methods (#25966) (overlookmotel)
• 3b09c04 packages/codegen: Clarify comment (#25959) (overlookmotel)

Table of Contents

• Oxlint v1.80.0
• Oxfmt v0.65.0

Oxlint v1.80.0

🚀 Features

• 70c3e35 linter/typescript/no-confusing-non-null-assertion: Implement suggestion (#26012) (Mikhail Baev)

🐛 Bug Fixes

• 17ae11c linter/oxc/double-comparisons: Handle grouped logical expressions (#26044) (camc314)
• 8a353a7 linter/eslint/no-control-regex: Refine help message text (#25996) (Rahul Mishra)
• 8a9bdbd estree: Include decorators in FormalParameterRest spans (#26021) (camc314)
• 8d94cd1 linter/eslint/no-useless-rename: Preserve type modifiers (#26020) (Cameron)
• 2cde1f6 rust: Address nightly deprecations (#25998) (Boshen)
• 51d36d7 linter/vue: Resolve vue imports via shared import helpers (#25903) (Connor Shea)
• 83a68d2 linter/react/no-react-children: Resolve react imports by symbol (#25901) (Connor Shea)
• 124e196 linter: Resolve globals by reference, not by name (#25905) (Connor Shea)
• a701bcc linter: Remove invalid React compiler doc links (#25900) (Boshen)

📚 Documentation

• 9b7e153 linter: Set version to 1.79.0 for rules shipped in 1.79.0 (#25902) (connorshea)

Oxfmt v0.65.0

🐛 Bug Fixes

• bf37dd5 formatter: Preserve class decorators before export when the statement is suppressed (#26034) (leaysgur)

🚀 Features

• 83cb516 minifier: Improve negation of expressions in boolean context (#25755) (Armano)

🐛 Bug Fixes

• 82a790d codegen: Narrow printSync input type (#25871) (camc314)
• 134fb22 isolated-declarations: Preserve unresolved parameter types (#25909) (Dunqing)
• 526c2b3 codegen: Remove deprecated test APIs (#25889) (camc314)
• 344a9b2 codegen: Align enum template sourcemaps (#25872) (camc314)

⚡ Performance

• 603b904 packages/codegen: Check sourceText only once (#25887) (overlookmotel)
• 5ef0c93 minifier: Unwrap all unary exprs without creating dummy expressions (#25891) (Armano)
• 8783524 packages/codegen: Remove loop from growMappingBuffer (#25886) (overlookmotel)
• b6b14c0 packages/codegen: Remove redundant branch (#25885) (overlookmotel)
• be6adf0 packages/sourcemap: Make location passed to recordSourceMapping always a number (#25884) (overlookmotel)
• f720f15 packages/codegen: Take named-mapping only code off hot path in recordSourceMapping (#25883) (overlookmotel)
• a734af5 packages/codegen: Remove redundant setting of last in printImportAttributes and printIf (#25882) (overlookmotel)
• c6e44c6 packages/codegen: Combine 2 writes in printJSXElement (#25881) (overlookmotel)
• 8801662 packages/codegen: Remove redundant mapping from printParams (#25880) (overlookmotel)

📚 Documentation

• 5ad330e packages/codegen: Reformat comments (#25876) (overlookmotel)

💥 BREAKING CHANGES

• 365274e packages/codegen: [BREAKING] printSync return an object (#25720) (overlookmotel)

🚀 Features

• 6a7eb60 packages/codegen: Alter capitalization of sourceFilename option (#25854) (overlookmotel)
• 300763f packages/codegen: Add full source map support (#25585) (camc314)
• a169e4a napi/minify: Expose property name mangling options (#24741) (Dunqing)
• 2f5cdb1 minifier: Add property name mangling (#24740) (Dunqing)
• 4922141 mangler: Deduplicate private accessor names (#25601) (camc314)
• 1c4f519 napi: Add Relay transform plugin (#25503) (Boshen)
• a4478e9 codegen: Add oxc-codegen package (#25488) (overlookmotel)

🐛 Bug Fixes

• 0fbcf64 codegen: Validate sourcemap options (#25860) (camc314)
• 345f981 react_compiler: Skip node_modules by default (#25859) (Boshen)
• ab81f3f minifier: Drop side-effect-free additions (#25639) (Dunqing)
• 241c559 napi/minify: Accept RegExp for property filters (#25827) (Dunqing)
• 4cc7ea4 codegen: Reject invalid indent options (#25807) (camc314)
• 53f9295 isolated-declarations: Preserve undefined for defaulted any (#25292) (camc314)
• 8ab883a codegen: Preserve property key annotations (#25766) (Dunqing)
• b13fd48 minifier: Model uninitialized module vars as undefined (#25497) (Dunqing)
• f6000ac ecmascript: Fold ** with Number::exponentiate, not IEEE pow (#25644) (Kotaro Chikuba)
• b846abc isolated-declarations: Handle ambient expando properties (#25655) (camc314)
• dec0a86 react-compiler: Standardize diagnostics (#25702) (Boshen)
• fca2e0c parser: Reject initialized lexical declarations in for-in (#25700) (Boshen)
• ae9be8f parser: Forbid type parameters on quoted constructors (#25696) (Boshen)
• c5f188a react-compiler: Use Babel v1 validation defaults (#25676) (Boshen)
• db44651 napi: Disable reuseWorker in browser bindings (#25640) (leaysgur)
• ce35d47 react_compiler: Preserve JSX import source pragmas (#25592) (Boshen)
• 059784d semantic: Respect shadowed Infinity and NaN in enum evaluation (#25604) (camc314)
• bb5a232 minifier: Keep variable declaration initilized with class when keepNames is enabled (#25584) (sapphi-red)
• f49229d minifier: Keep side effects when rotating bitwise operands (#25596) (Kotaro Chikuba)
• e82495b ecmascript: Derive ToNumber of !x from ToBoolean (#25595) (Kotaro Chikuba)
• 509931b semantic: Classify global references per identifier (#25608) (camc314)
• 80484ce mangler: Correct base54 safety comment (#25606) (camc314)
• c1369a7 codegen: Resolve private names in class heritage (#25588) (camc314)
• c002f29 codegen: Escape sources for empty import specifiers (#25586) (camc314)
• 0c68b7f estree: Emit decorators on FormalParameterRest (#25582) (camc314)
• cdf1846 semantic: Allow legacy escapes in JSX attributes (#25576) (Boshen)
• e75e102 minifier: Preserve block statement in labeled iteration statements (#25162) (Armano)
• 771d79a mangler: Exclude non-manglable symbols from slot assignment (#25539) (sapphi-red)
• 76b19f5 minifier: Avoid duplicating large folded strings (#25532) (Dunqing)
• 59e8895 codegen: Validate starting indent level (#25550) (camc314)
• 88b34f2 clippy: Remove unneeded unsafe (#25551) (camc314)
• 23a7ad0 parser: Stop delimited lists at end of file (#25542) (Boshen)
• 73acba9 parser: Preserve fatal errors during await reparse (#25541) (Boshen)
• c3e99d1 minifier: Avoid invalid octal escapes in template folds (#25495) (Dunqing)
• b4e6a9e codegen: Output newline after export default interface (#25487) (overlookmotel)
• 5fcf683 minifier: Correct issue with try finally termination (#25185) (Armano)
• 1645d93 react_compiler: Preserve source spans (#25462) (Boshen)
• 8d7f9cf react_compiler: Honor eslint suppressions (#25394) (Boshen)

⚡ Performance

• 568203e ecmascript: Use binary search for known globals (#25817) (Boshen)
• c84ede3 estree_tokens: Share JS token update entry point (#25826) (Boshen)
• 9a6e862 minifier: Move owned statements directly (#25835) (Dunqing)
• 61b2aef minifier: Move owned AST nodes directly (#25837) (Dunqing)
• 673b04b minifier: Replace expressions without take_in dummies (#25836) (Dunqing)
• 63ff8ef linter: Outline diagnostic construction (#25762) (Boshen)
• 621808e diagnostics: Measure graphemes lazily (#25723) (Boshen)
• f62ed0e diagnostics: Optimize graphical number rendering (#25715) (Boshen)
• 7152834 diagnostics: Reduce graphical formatting overhead (#25714) (Boshen)
• 10fc4b7 diagnostics: Reduce graphical rendering allocations (#25711) (Boshen)
• 9c8abab diagnostics: Batch graphical reports (#25710) (Boshen)
• 757f3d4 mangler: Share allocated names across reused slots (#25605) (camc314)
• 5444cbf codegen: Skip escaping harmless < tokens (#25564) (camc314)

📚 Documentation

• 58f7ab9 packages/codegen: Reformat docs and comments (#25848) (overlookmotel)
• 627466e transform-react: Document all options (#25800) (Boshen)
• ce03ac1 packages/codegen: Fix JSDoc comments for printSync (#25722) (overlookmotel)
• 386a699 packages/codegen: Correct JSDoc comment (#25716) (overlookmotel)
• 31e571d mangler: Update code example (#25599) (camc314)
• fd62354 codegen: Revamp package readme (#25560) (camc314)
• ffa3153 codegen: Clarify raw transfer Node requirement (#25565) (camc314)
• c5d4063 codegen: Clarify binary walk allocations (#25562) (camc314)
• 5703d7a codegen: Correct stale printer comments (#25561) (camc314)

Table of Contents

• Oxlint v1.79.0
• Oxfmt v0.64.0

Oxlint v1.79.0

💥 BREAKING CHANGES

• 8c4552d linter: [BREAKING] Split react/react-compiler into per-category rules (#25500) (Boshen)

See React Compiler Support for details.

🚀 Features

• 9b7394e linter/typescript/no-empty-object-type: Implement suggestion (#25833) (Mikhail Baev)

🐛 Bug Fixes

• 345f981 react_compiler: Skip node_modules by default (#25859) (Boshen)
• 2f40afa linter/unicorn/no-array-callback-reference: Ignore effect library imports (#25857) (Michaël Bitard)
• 7b565a0 linter: Align React Compiler rule categories (#25840) (Boshen)
• 228e8e0 linter: Resolve inactive React compiler rules (#25830) (Boshen)
• f8e4884 linter/eslint/no-useless-constructor: Allow parameter properties (#25811) (camc314)
• e4b6993 linter: Report exhaustive effect dependencies (#25829) (Boshen)
• 742e25f linter/eslint/no-return-assign: Anchor diagnostic on return stmt (#25803) (camc314)
• b831ca8 react-compiler: Improve derived state diagnostic (#25804) (Boshen)
• 5908c87 linter/jest/prefer-mock-return-shorthand: Preserve implementations using this (#25802) (camc314)
• f6b2265 linter/eslint/no-redeclare: Run in ES modules, skipping only the globals check (#25691) (Hamody We)
• ca9f553 linter/unicorn/prefer-default-parameters: Mark fixer as a suggestion (#25801) (camc314)
• aa49d86 linter: Allow spread rule options in config types (#25675) (ch3rry)
• d5483f8 linter/typescript/no-useless-empty-export: Skip TS declaration files (#25789) (Evyatar Daud)
• 57f2199 linter/typescript/no-useless-empty-export: Report after imports (#25786) (camc314)
• 633bc19 linter/typescript/no-unnecessary-type-conversion: Mark fixer as suggestion (#25787) (camc314)
• dea3339 linter/typescript/explicit-module-boundary-types: Anchor diagnostics on arrows (#25779) (camc314)
• 5cd6f02 linter/eslint/array-callback-return: Anchor diagnostic on callback (#25780) (camc314)
• ef8cebf linter/eslint/preserve-caught-error: Handle AggregateError options (#25775) (camc314)
• c108d5c linter: Improve React Compiler diagnostics (#25742) (Boshen)
• c9ec55e react-compiler: Improve diagnostic spans (#25731) (Boshen)
• 1cbbcb7 linter/unicorn/prefer-string-replace-all: Apply fixes in one pass (#25709) (Mikhail Baev)
• dec0a86 react-compiler: Standardize diagnostics (#25702) (Boshen)
• 5fd77f7 linter/react/display-name: Report curried HOC inner component (#25662) (camc314)
• 4dbb80e linter/import/no-named-as-default: Report local export conflicts (#25658) (camc314)
• e8a7214 linter/react/rules-of-hooks: Report hooks inside try blocks (#25670) (camc314)
• 36f8451 linter/eslint/no-eval: Align indirect default with ESLint (#25656) (camc314)
• d901d24 linter/react/exhaustive-deps: Handle destructured object dependencies (#25669) (camc314)
• beb724d linter/eslint/no-unused-vars: Report bare underscore parameters (#25663) (camc314)
• fa36f26 linter/react/no-this-in-sfc: Detect this in nested arrow callbacks (#25653) (camc314)
• 44d1be3 linter/typescript/no-var-requires: Run rule on JavaScript (#25664) (camc314)
• 4004c10 linter/eslint/no-irregular-whitespace: Check comments by default (#25660) (camc314)
• 625401d linter/import/no-named-default: Flag type-only named defaults (#25661) (camc314)
• 8eacb2d linter/typescript/no-non-null-asserted-optional-chain: Detect assertions after continued optional chains (#25659) (camc314)
• d55b76c linter/react/no-direct-mutation-state: Detect computed state mutations (#25654) (camc314)
• f92c651 linter/unicorn/no-abusive-eslint-disable: Use directive prefix in diagnostic (#25657) (camc314)
• ee44996 linter/eslint/max-classes-per-file: Anchor diagnostic at program start (#25652) (camc314)
• 403ec40 linter/eslint/no-multi-assign: Handle parenthesized declarator initializers (#25651) (camc314)
• 6c9ba37 linter/jest/expect-expect: Detect assertions in nested function declarations (#25650) (camc314)
• 285820e linter/no-large-snapshots: Precompile and document allowed snapshot matchers (#25611) (Mikhail Baev)
• 1be1e20 linter/eslint/prefer-promise-reject-errors: Report on spread arguments (#25648) (Mikhail Baev)
• a38f7b3 oxlint,oxfmt: Apply .gitignore only to walk targets, not explicitly named files (#25531) (leaysgur)
• 509931b semantic: Classify global references per identifier (#25608) (camc314)
• 0c68b7f estree: Emit decorators on FormalParameterRest (#25582) (camc314)
• 1d22912 linter/plugins: Parse rule-less directive justifications (#25559) (camc314)
• eaf80d8 linter/unicorn/prefer-node-protocol: Validate exact Node.js built-in specifiers (#25558) (camc314)
• 57b94af linter/promise/no-multiple-resolved: Ignore unresolved globals (#25530) (Tushar Singh)
• 80e64c2 linter/expect-expect: Validate assertion regex (#25504) (Mikhail Baev)
• 7830604 linter/react/exhaustive-deps: Treat binary expressions as a stable dependency (#25508) (Hamody We)
• 4df5835 linter: Allow capitalized built-in calls (#25516) (Boshen)
• 9d49d27 react_compiler: Bail out instead of panicking on "Expected a node for all scopes" (#25506) (Boshen)
• d43b562 linter/vitest/prefer-expect-assertions: Handle parameterized Vitest assertion suggestions (#25476) (camc314)

⚡ Performance

• e8303d6 linter: Shrink rule serialization dispatch (#25818) (Boshen)
• c84ede3 estree_tokens: Share JS token update entry point (#25826) (Boshen)
• 35c8eb2 linter: Compute sort keys once with sort_by_cached_key (#25821) (Boshen)
• f0121ed linter: Share config deserialization entry point (#25820) (Boshen)
• 2dacf7a oxlint: Reduce debug formatting code size (#25797) (Boshen)
• 9ed10b7 linter: Use unstable sorts for unique keys (#25778) (Boshen)
• 63ff8ef linter: Outline diagnostic construction (#25762) (Boshen)
• 2dd7446 diagnostics: Preallocate graphical output (#25721) (Boshen)
• 9c8abab diagnostics: Batch graphical reports (#25710) (Boshen)
• 8e9b95f linter: Use table for rule names (#25458) (Boshen)

Oxfmt v0.64.0

🚀 Features

• c07fe7c oxfmt: Support experimentalOperatorPosition (#25643) (leaysgur)
• 2adb8fb formatter: Implement operatorPosition option (#25581) (leaysgur)

🐛 Bug Fixes

• 44231fb formatter: Fix comment and indent issues around unions (#25665) (leaysgur)
• 2465e87 formatter: Keep comments in place when dropping EmptyStatement (#25730) (leaysgur)
• 7e4f3b7 formatter: Print JSDocUnknownType (#25729) (leaysgur)
• 5238d9e formatter: Keep nested awaited-paren member chain grouped in call arguments (#25646) (leaysgur)
• a38f7b3 oxlint,oxfmt: Apply .gitignore only to walk targets, not explicitly named files (#25531) (leaysgur)
• 5c0a5ff formatter_css: Fill own-line block comments inside space-separated values (#25578) (leaysgur)
• 53debfa formatter_css: Keep trailing comma and indent after comment-preceded last map value (#25577) (leaysgur)
• 1a83a8d oxfmt: Mirror printer line suppression and restore dedent-to-root (#25573) (leaysgur)
• 7f350d1 formatter: Keep unary comment and print only needed parens (#25526) (leaysgur)
• f405789 formatter_yaml: Consistent chomped eos behavior (#25523) (leaysgur)
• a243311 formatter_yaml: Bump oxc-yaml-parser for contentless block scalar (#25519) (leaysgur)
• 40d38a0 formatter_css: Keep multi value function args intact after leading comment (#25518) (leaysgur)

📚 Documentation

• 223e785 oxfmt/conformance: Update notes on conformance (#25757) (Yuji Sugiura)
• 673dc6d oxfmt: Move some docs from AGENTS.md to code comment (#25649) (leaysgur)
• fed6681 oxfmt: Skip expanding overrides options (#25572) (leaysgur)

💥 BREAKING CHANGES

• a33788e ast: [BREAKING] Group class heritage into ClassHeritage (#25360) (camc314)
• 5c5cdcd ast: [BREAKING] Narrow TSInterfaceHeritage::expression to TSTypeName (#24360) (camc314)
• 6be314f ast: [BREAKING] Remove duplicated VariableDeclarator::kind (#25319) (camc314)
• 44fd320 ast: [BREAKING] Split TS external modules & Namespace Declarations (#25284) (camc314)

🚀 Features

• 9a37c41 napi: Restructure React transform options (#25326) (Boshen)
• b3c1b30 allocator: Add ArenaVec::push_mut (#25338) (overlookmotel)

🐛 Bug Fixes

• bbd6ed3 codegen: Wrap string literal in parens after directives (#25435) (overlookmotel)
• d07a293 codegen: Preserve cast parentheses in conditional tests (#25115) (camc314)
• 8b7d441 codegen: Preserve satisfies parentheses before bitwise operators (#25113) (camc314)
• e0fb2d7 minifier: Avoid unsafe return removal in labeled blocks (#25406) (Armano)
• c49f4ce parser: Preserve terminal license comments (#25400) (camc314)
• 9d19ab3 transform_react: Downgrade nonfatal compiler diagnostics (#25418) (Boshen)
• 937825c react_compiler: Disable exhaustive memo validation by default (#25417) (Boshen)
• 12937b3 parser: Reject comma expressions in class fields (#25385) (Cameron)
• 7d8a9b5 react_compiler: Preserve hook spans for React Refresh (#25393) (Boshen)
• 9e93ba6 parser: Reset auto-accessor initializer context (#25384) (camc314)
• cc2e28d parser: Reject trailing tokens in Parser::parse_expression (#25371) (camc314)
• 697c629 minifier: Preserve Annex B labeled-function bindings in implicit-return rewrite (#25349) (Armano)
• 4d723ca parser: Report TS1035 for quoted module names (#25305) (camc314)
• 0c9b980 semantic: Report module declaration diagnostics (#25285) (camc314)
• 2a1058a napi: Omit parser header from WASI declarations (#25254) (camc314)

⚡ Performance

• dd1430b semantic: Avoid allocation in class overload check (#25440) (camc314)
• e420816 parser: Optimize trailing comma tracking (#25376) (camc314)
• 6529d1a minifier: Short-circuit scope check when alternate already determines result (#25318) (Armano)

📚 Documentation

• fe111eb allocator: Improve doc comments for Arena methods (#24922) (overlookmotel)

Table of Contents

• Oxlint v1.78.0
• Oxfmt v0.63.0

Oxlint v1.78.0

🚀 Features

• ccb8fe8 linter/jsdoc: Implement no-blank-blocks rule (#25207) (Mikhail Baev)
• d4a897c linter/eslint: Implement one-var rule (#24470) (Cole Ellison)
• 5ab9340 linter/jsx-a11y/anchor-has-content: Add options to match eslint (#24571) (Cole Ellison)

🐛 Bug Fixes

• b746e00 linter/eslint/no-implicit-coercion: Preserve template coercion whitespace (#25470) (camc314)
• a92c541 linter: Preserve source text for JS plugin ignore fixes (#25280) (Norcleeh)
• 675c840 linter/eslint/prefer-promise-reject-errors: Handle parenthesized calls (#25378) (camc314)
• 1703739 linter/unicorn/new-for-builtins: Ignore optional chains (#25411) (tanakalucky)
• 95ece63 linter/unicorn/prefer-code-point: Downgrade the auto-fix to dangerous (#25412) (leemr)
• c451a0e linter/vitest: Validate consistent-test-filename regex patterns (#25408) (Mikhail Baev)
• 937825c react_compiler: Disable exhaustive memo validation by default (#25417) (Boshen)
• f0f7dae linter/eslint/no-unused-vars: Report invalid regex options (#25380) (Cameron)
• 44e73fd linter/unicorn/prefer-array-flat: Fix concat.apply suggestions (#25373) (Cameron)
• 6846a9a linter/react/rules-of-hooks: Detect constructor callbacks (#25377) (camc314)
• b247a9d linter/unicorn/new-for-builtins: Support Float16Array (#25382) (tanakalucky)
• 19109cd linter/unicorn/error-message: Support SuppressedError messages (#25375) (camc314)
• 9c13f5e linter: Assert token lookup invariants (#25368) (camc314)
• bc35f83 linter/eslint/no-unused-vars: Bound catch parameter lookup (#25367) (camc314)
• c159fb9 linter/unicorn/switch-case-braces: Bound token lookup (#25363) (camc314)
• 03b2eb2 linter/unicorn/no-static-only-class: Bound token lookup (#25361) (camc314)
• 0afc59e linter/unicorn/empty-brace-spaces: Bound token lookup (#25353) (camc314)
• 2963d98 linter/eslint/no-unreachable-loop: Do not report loops whose body has a finally block (#25335) (Todor Andonov)
• 589e5fb linter/eslint/no-param-reassign: Validate ignorePropertyModificationsForRegex property (#25346) (Mikhail Baev)
• aae5d8b linter/eslint/no-throw-literal: False positive on variable declared without initializer (#25275) (cjnoname)
• 6b1c479 oxlint: Normalize customized rule names (#25316) (camc314)
• d494eb5 linter/unicorn/consistent-existence-index-check: Bound token lookup (#25325) (camc314)
• 4266037 linter/typescript/prefer-namespace-keyword: Bound token lookup (#25322) (camc314)
• 4745b4e linter/typescript/no-namespace: Bound token lookup (#25321) (camc314)
• 648a481 linter/eslint/one-var: Avoid joining exported declarations (#25314) (camc314)
• 9573937 linter/typescript: Validate ban-ts-comment description_format (#25320) (Mikhail Baev)
• ebf7d18 linter/typescript/consistent-type-definitions: Bound token lookup (#25281) (camc314)
• 1501ccf linter/typescript/consistent-generic-constructors: Bound token lookup (#25258) (camc314)

⚡ Performance

• 8f784f3 linter: Reduce rule config dispatch size (#25461) (Boshen)
• 2de4ec2 linter: Reduce visitor code size (#25441) (Boshen)
• 6fb7f47 linter/unicorn/prefer-export-from: Narrow ExportFromDeclaration lookup (#25381) (camc314)
• e3f6263 linter/unicorn/prefer-default-parameters: Avoid reference allocation (#25379) (camc314)
• d863473 linter/vue/max-props: Narrow AST dispatch (#25372) (camc314)
• 273d867 linter: Avoid diagnostic sorting after applying fixes (#25079) (Sysix)
• 4ec9189 oxlint/lsp: Avoid second lock for getting/removing unused directives (#25350) (Sysix)
• 6c0d01b oxlint/lsp: Preallocate fix-content vec (#25351) (Sysix)
• 3a94055 linter: Avoid per-call heap allocations in jest and unicorn helpers (#25210) (Connor Shea)
• 4abff11 linter: Avoid redundant message work in the agent reporter (#25315) (Connor Shea)
• 6bb5421 linter: Hoist current_dir out of the stylish reporter loop (#25313) (Connor Shea)
• 9a7c323 linter: Compute diagnostic Info once per diagnostic in junit reporter (#25312) (Connor Shea)
• 1cf7dde oxlint: Render JSON report into a single buffer (#25295) (connorshea)
• 8492cfd linter/typescript/ban-ts-comment: Bail early with substring guard (#25301) (Jacob Asper)
• 7607f04 linter/typescript/ban-tslint-comment: Replace regex with manual parser (#25299) (Jacob Asper)

Oxfmt v0.63.0

🚀 Features

• fd02a89 oxfmt: Dispatch yaml-in-css(frontmatter) to oxc_formatter_yaml (#25336) (leaysgur)
• ab12665 formatter_core: Add hardlineWithoutBreakParent equivalent IR (#25273) (leaysgur)

🐛 Bug Fixes

• 95dc917 oxfmt: Drop IR Space at line start for js-in-xxx (#25460) (leaysgur)
• b63eccc formatter: Keep comments after TS this_param (#25459) (leaysgur)
• ab52a59 formatter: Format xxx-in-js inside JSDoc js fence (#25414) (leaysgur)
• 1a2c64a formatter,oxfmt: Apply effective print width for JSDoc fence (#25413) (leaysgur)
• 2eaede9 formatter_core: Unify leading-BOM handlings (#25340) (leaysgur)
• ef1d04b formatter: Break mapped type brackets (#25297) (leaysgur)
• 4e6f3f1 formatter: Break index signature brackets (#25296) (leaysgur)
• e23dccf formatter_css: Bump oxc-css-parser to accept unknown at-rule with interpolated (#25277) (leaysgur)
• c29b587 formatter_core: Measure decided-flat fill separator as flat during group re-measure (#25276) (leaysgur)
• f3c6953 formatter_yaml: Don't rewrite overflowing key to implicit (#25274) (leaysgur)

⚡ Performance

• c9d1a5b oxfmt: Spawn tinypool lazily (#25298) (leaysgur)

📚 Documentation

• 6eae5c9 formatter,oxfmt: Record embed-layer decisions in place (#25422) (leaysgur)
• 51224a7 formatter_yaml: Pin EOF blank lines divergence (#25269) (leaysgur)

💥 BREAKING CHANGES

• 4120da0 semantic: [BREAKING] Return borrowed JSDoc so the parse cache works (#25186) (Connor Shea)
• f0a41c8 allocator: [BREAKING] Remove ArenaBox::dangling method (#25236) (overlookmotel)
• 067da8c ast: [BREAKING] Store single parameter in TSIndexSignature::parameter (#25154) (camc314)
• a0c7788 ast: [BREAKING] Change TSIndexSignatureName::name to Ident (#25150) (camc314)
• 1bdedd1 ast: [BREAKING] Introduce ExportDeclaration, ExportFromDeclaration (#25095) (camc314)
• c917f20 ast: [BREAKING] Introduce ArrowFunctionBody enum (#24987) (camc314)
• 7e1199c ast: [BREAKING] Remove conversion to Box from AST builder methods (#25038) (overlookmotel)

🚀 Features

• 3c8312e allocator: Make Box Send + Sync when the type it contains is (#25242) (overlookmotel)
• cb5bc08 ast: Derive GetSpan for Comment (#25147) (leaysgur)
• 8541e18 ast_tools: Generate minifier scope collector (#25088) (camc314)
• 5acdae2 ecmascript: Skip transparent TS expressions (#25072) (camc314)
• 85d0f4d napi: Add React Compiler transform binding (#24934) (Boshen)
• 70d6ece minifier: Fold safe integer exponentiation (#25009) (Dunqing)
• 73fc747 minifier: Enable termination statement optimization for do while (#24921) (Armano)
• 5eadfdb minifier: Fold safe integer division and remainder (#24981) (Dunqing)

🐛 Bug Fixes

• 6c9ee14 minifier: Preserve if-chain idempotency and correct side effects when alternate should not be moved (#25041) (Armano)
• 8a47ff3 ecmascript: Do not treat lone-surrogate strings as constants (#25084) (Dunqing)
• 468b970 isolated-declarations: Strip re-export attributes (#25090) (camc314)
• a70035d parser: Report export imports in namespaces (#25086) (camc314)
• 5d8ccf5 react_compiler: Preserve nonfatal diagnostics (#25066) (Boshen)
• d349e4a react_compiler: Match eslint suppression gating (#25068) (Boshen)
• 0dc16ba react_compiler: Track catch block declarations (#25067) (Boshen)
• e6734a5 minifier: Fold typeof comparisons with known object strings (#25017) (Dunqing)
• 3a9d5a5 minifier: Keep typeof foo == ['object'] as-is (#24941) (sapphi-red)
• 10ec276 ast: Custom AST builder methods take IntoIn<ArenaBox> where child method does (#25033) (overlookmotel)
• fbe8d31 minifier: Respect targets when folding RegExp source (#24790) (Dunqing)

⚡ Performance

• fb402b0 minifier: Stop re-deriving printed numeric spellings (#25103) (Dunqing)
• 7251e52 react_compiler: Avoid large types on stack (#25037) (overlookmotel)
• e07718f isolated_declarations: Avoid large types on stack (#25036) (overlookmotel)
• 9fb1e3e transformer: Avoid large types on stack (#25035) (overlookmotel)
• 8b80f8b parser: Avoid large types on stack (#25034) (overlookmotel)

📚 Documentation

• 2ea0aa9 ast: Correct grammar in AST builder methods doc comments (#25173) (overlookmotel)