🚀 Features

• 1fac655 coverage: Support new TypeScript fixture layout (#26226) (camc314)

🐛 Bug Fixes

• cd7228f minifier: Add missing negation for boolean literal (#26847) (Armano)
• 32305e2 transformer: Skip enum reverse mappings for syntactic string initializers (#26724) (Dunqing)
• 7811f0a parser: Preserve reparsed await tokens (#26619) (camc314)
• 9220158 transformer: Skip recovered using loop patterns (#26722) (camc314)
• 3130405 parser: Recover await using object binding patterns (#26721) (camc314)
• 827fdbd parser: Reject invalid modifiers on import aliases (#26622) (camc314)

⚡ Performance

• 3f1e3aa minifier: Preallocate stmts vec size to avoid excesive reallocs (#26856) (Armano)
• bd3f69e semantic: Reuse identifier hashes in enum member lookups (#26773) (camc314)
• 5f72954 minifier: Reduce allocations when processing if statements (#26666) (Armano)

🚀 Features

• ca649e0 ecma: Define math constants as known globals and resolve their types (#26585) (Armano)
• 9ef028c codegen: Add ascii_only option (#25994) (Samuel Attard)
• 80a76a0 minifier: Negate binary comparison for typeof x < 'u' (#26367) (Armano)

🐛 Bug Fixes

• 8ca76da parser: Reject accessor modifiers on methods (#26617) (camc314)
• 1916f31 parser: Reject readonly modifier on constructors (#26612) (camc314)
• 1c42008 parser: Handle escaped let in for loops (#26583) (camc314)
• d21d5cf parser: Recognize annotated empty arrows in conditionals (#26537) (camc314)
• d7713ad parser: Classify Unicode line breaks in block comments (#26536) (camc314)
• 75cd919 transformer: Preserve receivers in private optional chains (#26535) (camc314)
• b32d25d parser: Reject escaped import-phase keywords (#26534) (camc314)
• 47b8311 parser: Recognize contextual binding names in type lookaheads (#26532) (camc314)
• d6b6705 parser: Require arrow separator in TypeScript function types (#26529) (camc314)
• e98beef parser: Disambiguate await using in for initializers (#26527) (camc314)
• 92afee6 parser: Allow parenthesized JSX comma expressions with preserve_parens=false (#26524) (camc314)
• 31508b1 parser: Reject return types on constructor overloads (#26523) (camc314)
• a091fc4 parser: Validate await context for await using declarations (#26495) (camc314)
• 5501e86 parser: Disallow in expressions in using for-loop initializers (#26490) (camc314)
• c8e5fa7 parser: Allow escaped type names in import and export specifiers (#26487) (camc314)
• 2dcee2f parser: Reject async modifiers on class fields (#26486) (camc314)
• 973d58e parser: Require comma after TypeScript this parameter (#26480) (camc314)
• 32d00c5 codegen: Preserve instantiation expression precedence (#26424) (camc314)
• cfa47ab parser: Allow in expressions in class static blocks (#26423) (camc314)
• 5986187 packages/codegen: Preserve private-in right operand precedence (#26420) (camc314)
• f8e6c6c packages/codegen: Preserve in restriction through yield arguments (#26421) (camc314)
• d61e3bf parser: Validate TS named tuple rest elements (#26419) (camc314)
• ae6c386 codegen: Preserve in restriction through yield arguments (#26413) (camc314)
• 42ac916 codegen: Preserve private-in right operand precedence (#26411) (camc314)
• 10521b2 parser: Allow escaped type default import bindings (#26409) (camc314)
• 72cb5e3 parser: Reject rest parameters in getters (#26400) (camc314)
• 6e15ad5 packages/codegen: Print matching quoted import names as identifiers (#26404) (camc314)
• bbbb4bc packages/codegen: Preserve private-in left operand precedence (#26403) (camc314)
• a111b5b packages/codegen: Print accessibility modifiers before abstract (#26402) (camc314)
• 4e76602 parser: Allow in in arrow block bodies within for initializers (#26395) (camc314)
• b20fc19 parser: Reject partially parenthesized mixed coalesce expressions (#26394) (camc314)

⚡ Performance

• 1f902a6 isolated_declarations: Key scope maps by Ident (#26380) (Dunqing)
• a242469 minfiier: Reduce allocs when creating indirect access (#26601) (Armano)
• 5b4787f minifier: Update chain expressions in place (#26544) (Armano)
• 0bc1661 minifier: Try merging before creating new expression statements (#26556) (Armano)
• c78d707 minifier: Process newly created stmt in handle_if_statement (#26541) (Armano)
• 029c84b minfier: Update expressions in place when substituting alternate syntax (#26460) (Armano)
• d198982 codegen: Outline postfix source mapping work (#26450) (camc314)
• 53f006e ecmascript: Format small integer literals with itoa (#26446) (camc314)
• 8bfb8c0 codegen: Avoid duplicate sourcemap name lookups (#26441) (camc314)

📚 Documentation

• 38533ac ast: Move type annotation span comment to span field (#26522) (camc314)

💥 BREAKING CHANGES

• 66744f0 parser: [BREAKING] Rename panicked to fatal_error in ParserReturn (#26382) (overlookmotel)
• 2c9a947 parser: [BREAKING] Reduce MAX_LEN to 256 bytes below u32::MAX (#26352) (overlookmotel)

🚀 Features

• 32bdc5b allocator: Construct ArenaHashSet with any Default hasher (#26372) (Dunqing)
• a17de58 minifier: Process of return/throw in non last position and fix async * inlining (#26214) (Armano)
• bfb4c57 parser: Distinguish unapplied no-side-effects comments (#26120) (碳苯 Carbon)
• 1d9b9d3 ast: Add GetNodeId trait (#26145) (camc314)

🐛 Bug Fixes

• b156333 codegen: Order accessibility before abstract on accessors (#26392) (camc314)
• 116c8b8 transformer/class-properties: Keep private methods in class-expression scope (#26308) (Changsu Seong)
• 1400a0f parser: Require a string source after export ... from (#26389) (camc314)
• 2da73b7 codegen: Print matching quoted import names as identifiers (#26386) (camc314)
• 0a81d29 codegen: Preserve private-in left operand precedence (#26383) (camc314)
• 9a02337 parser: Correctly round large nondecimal literals (#26379) (camc314)
• 3d95477 transformer: Gate async-only rewrites by owning transform (#26326) (Dunqing)
• f45a9ee transformer: Limit arguments capture to lowered async functions (#26317) (Dunqing)
• 789969f transformer: Gate this capture by owning async transform (#26227) (Dunqing)
• affeb14 minifier: Mangle class private members in Node API (#26118) (碳苯 Carbon)
• 8b35abd semantic: Detect duplicate private class elements (#26361) (camc314)
• 457ed57 semantic: Reject await and yield in rest parameter defaults (#26359) (camc314)
• 4b89c7b semantic: Reject jumps across arrow functions (#26357) (camc314)
• c966aca parser: Do not omit < token opening type argument list (#26328) (overlookmotel)
• f07dca5 ast_visit: Add the trimmed prefix length to translation table offsets (#26173) (Bharadwaj Pendyala)
• 3ab9bd1 parser: Do not re-lex template substitution tail after fatal error (#26230) (overlookmotel)
• 07851b9 parser: Fix debug assert failure when lexer error with tokens enabled (#26229) (overlookmotel)
• 00dea7a allocator: Gate Allocator::data_end_ptr behind fixed_size feature (#26248) (camc314)
• 853ffab ecmascript: Avoid charAt panic on 32-bit (#26244) (camc314)
• 34feccb runtime: Remove stale regenerator exports (#26243) (camc314)

⚡ Performance

• 34a242e minifier: Use Ident for property mangler (#26334) (sapphi-red)
• 5303f5c minifier: Unify merging of last expression into target sequence (#26264) (Armano)
• 2ca7d29 minifier: Consume nodes in minimize_statements in reverse order (#26258) (Armano)
• d2354b4 mangler: Use Ident for variable names to keep (#26333) (sapphi-red)
• 5b3e335 minifier: Use Ident instead of Str in KeepVar (#26332) (sapphi-red)
• 51366fb minifier: Use IdentHashSet in PrivateMemberUsageStack (#26331) (sapphi-red)
• d19c42a minifier: Merge nested if stmt in place instead of creating dummies (#26351) (Armano)
• 356def6 parser: Shrink annotation comment ranges (#26356) (overlookmotel)
• a5be474 parser: Shave instruction off parse_jsx_element_name (#26355) (overlookmotel)
• 9780663 parser: Remove fatal error guard from parse_jsx_element_name (#26354) (overlookmotel)
• 766e12f parser: Remove token field from LexerCheckpoint (#26350) (overlookmotel)

📚 Documentation

• d4b4e61 transformer: Document ES2015 target floor (#26378) (Dunqing)
• 67dd054 ast_visit: Correct out-of-date comments on Utf8ToUtf16 converter (#26285) (overlookmotel)
• a8ed2a7 minifier: Fix stale validation instructions (#26251) (camc314)

💥 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)

🚀 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)

🚀 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)

💥 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)

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