Rolldown Release Notes

🚀 Features

• add output.charset option (#11194) by @sapphi-red
• code-splitting: route independent ESM re-exports per consumer (#11177) by @hyfdev

🐛 Bug Fixes

• handle output.charset: 'ascii' + output.minify: false (#11207) by @sapphi-red
• tree-shaking: preserve initialization of wrapped ESM re-exports (#11167) by @hyfdev
• sourcemap: preserve boundaries when tracing has no mapping (#11170) by @sapphi-red
• strict-execution-order: account for init imports during code splitting (#11162) by @hyfdev
• strict-execution-order: avoid eager loading through mixed re-exports (#11151) by @hyfdev
• tree-shake expression statements that coerce known constants (#10825) by @IWANABETHATGUY
• shim-missing-exports: shim deep namespace reads through default imports (#11184) by @IWANABETHATGUY
• shim-missing-exports: shim missing static namespace members (#11179) by @hyfdev
• preserve-entry-signatures: keep internal bindings out of entry exports (#11094) by @hyfdev
• report ASSIGN_TO_IMPORT for writes to re-exported namespace members (#11148) by @IWANABETHATGUY
• dev: keep files loaded by the HMR stage watched when the same task rebuilds (#11154) by @Brooooooklyn
• dev: watch lazily compiled files even when a build starts first (#11152) by @Brooooooklyn
• cjs: print a CommonJS module's top-level this as a wrapper parameter rolldown names (#11135) by @IWANABETHATGUY
• renamer: keep fixed names off the bindings that would capture them (#11134) by @IWANABETHATGUY
• renamer: keep an external require() local in a CJS module off the top-level names (#11133) by @IWANABETHATGUY
• rolldown: make a repeated close() a no-op (#11142) by @Brooooooklyn
• avoid renaming entry top-level bindings onto their nested bindings (#11122) by @IWANABETHATGUY
• renamer: keep generated top-level names off inner bindings (#11121) by @IWANABETHATGUY

🚜 Refactor

• renamer: treat a CJS-wrapped module's root scope as an inner scope (#11130) by @IWANABETHATGUY

📚 Documentation

• add renaming design and implementation docs (#11131) by @IWANABETHATGUY

⚡ Performance

• ci: overlap independent setup, checks, and artifacts (#11169) by @hyfdev

🧪 Testing

• dev: use dunce::canonicalize so dev engine tests pass on Windows (#11192) by @shulaoda
• preserve-entry-signatures: cover nested dynamic imports (#11164) by @hyfdev

⚙️ Miscellaneous Tasks

• deps: upgrade oxc to 0.154.0 (#11209) by @shulaoda
• make Security Analysis pass again (security-action v1.0.10, serde_yaml -> saphyr) (#11197) by @Brooooooklyn
• deps: update rollup submodule for tests to v4.64.5 (#11190) by @rolldown-guard[bot]
• deps: update test262 submodule for tests (#11191) by @rolldown-guard[bot]
• deps: update crate-ci/typos action to v1.51.1 (#11174) by @renovate[bot]
• vite-tests: link the workspace rolldown into the Vite clone again (#11147) by @Brooooooklyn

🚀 Features

• rolldown_plugin_vite_import_glob: follow file creation and deletion via hotUpdate (#10550) by @shulaoda
• inline-common-chunks: deduplicate shared code along known loading paths (#11093) by @hyfdev
• rolldown_plugin_vite_import_glob: record a matcher per glob call in dev (#10592) by @shulaoda
• rolldown_plugin_vite_import_glob: watch the directory each glob reads (#10549) by @shulaoda
• watch: hand watch.exclude to notify as its ignore filter (#11008) by @shulaoda
• dev: add experimental.devMode.hotUpdate option (#11123) by @h-a-n-a

🐛 Bug Fixes

• renamer: check the printed name of namespace-alias imports for captures (#11129) by @IWANABETHATGUY
• devtools: honor devtools.sessionId by @Brooooooklyn
• renamer: keep a renamed nested binding off its module's top-level bindings (#11128) by @IWANABETHATGUY
• dev: keep this undefined when calling an imported function in HMR patches and lazy chunks (#11126) by @h-a-n-a
• dev: read string-named imports correctly in HMR patches and lazy chunks (#11127) by @h-a-n-a
• sanitize preserveModules chunk names after resolving the relative path (#11087) by @waltuov
• keep the with clause on bare external imports (#11100) by @IWANABETHATGUY
• generator: filter DISABLE_JS_HOOK bits from generated HookUsage (#10346) by @Brooooooklyn
• dev: make the module factory async for top-level await (#11118) by @h-a-n-a
• node: give each renderChunk call its own meta object (#11115) by @Brooooooklyn
• honor externalLiveBindings for imported exports (#11048) by @camc314
• dev: keep a late payload from replacing newer module code (#11030) by @h-a-n-a
• binding: use-after-free in async transform with a TsconfigCache (#11080) by @shulaoda
• fail on chunk syntax errors and escape export names once (#11051) by @hyfdev
• dev: ship newly imported modules the client never received (#11029) by @h-a-n-a
• code-splitting: avoid cycles from redundant re-export initialization (#11073) by @hyfdev
• link: treat re-exports of the same external binding as one export (#11069) by @IWANABETHATGUY
• escape namespace properties in IIFE and UMD output (#11085) by @hyfdev
• escape dependency paths in CJS and UMD output (#11084) by @hyfdev
• use computed access for arbitrary import names (#11083) by @hyfdev
• generate valid bindings for shimmed exports (#11082) by @hyfdev
• dev: reload the page when an HMR update fails after merging its edit (#11031) by @h-a-n-a
• dev/lazy: ship the deps of a module that a patch shipped but never ran (#11028) by @h-a-n-a
• code-splitting: don't move init calls in front of unwrapped JSON modules (#11062) by @IWANABETHATGUY
• escape export names in defineProperty calls (#11047) by @camc314

📚 Documentation

• say the CLI bundles multiple configs one after another (#11111) by @Brooooooklyn
• add renderChunk hook filter docs (#11065) by @sapphi-red

⚡ Performance

• use concat_string! instead of format! for plain string joins (#11139) by @IWANABETHATGUY
• utils: evaluate each concat_string! argument once (#11105) by @IWANABETHATGUY
• json: escape JSON.parse string with json-escape-simd (#11104) by @IWANABETHATGUY
• unwrap JSON modules with a non-object root (#11066) by @IWANABETHATGUY

🧪 Testing

• inline-common-chunks: fix flaky inlineCommonChunks concurrent imports (#11088) by @hyfdev

⚙️ Miscellaneous Tasks

• deps: upgrade oxc to 0.153.0 (#11109) by @camc314
• update pnpm to v12 (#10876) by @btea
• deps: update pnpm to v11.28.0 (#11049) by @renovate[bot]
• deps: update rollup submodule for tests to v4.64.0 (#11116) by @rolldown-guard[bot]
• deps: update napi (#11137) by @renovate[bot]
• scripts: spawn the rolldown CLI without a shell in setup-vite (#10875) by @Brooooooklyn
• deps: bump @napi-rs/wasm-runtime to ~1.2.5 (#11117) by @shulaoda
• deps: update napi (#11108) by @renovate[bot]
• deps: update taiki-e/install-action action to v2.87.22 (#11096) by @renovate[bot]
• deps: update npm packages (#11095) by @renovate[bot]
• deps: update rust crates (#11097) by @renovate[bot]
• deps: update napi (#11063) by @renovate[bot]
• deps: update dependency rust to v1.99.0 (#11071) by @renovate[bot]
• deps: update dependency vite-plus to v1 (#11056) by @renovate[bot]

🚀 Features

• inline common chunks containing import() and deduplicate shared code in lazy chunks (#11034) by @hyfdev
• experimental inlineCommonChunks support (#10899) by @hyfdev
• dev: ship imported bindings for HMR partial accept (#10856) by @h-a-n-a

🐛 Bug Fixes

• chunking: re-derive chunk exec orders after the runtime leaves its host chunk (#11005) by @hyfdev
• code-splitting: gate member-read init paths on the reading statement (#11039) by @hyfdev
• code-splitting: retain initialization paths through re-exported namespaces (#11037) by @hyfdev
• dev: reject non-ESM output formats in dev mode (#11038) by @h-a-n-a
• dev: align import.meta.hot.accept deps with Vite (#10997) by @h-a-n-a
• dev: clear the resolver cache when a file is created or deleted (#10986) by @waltuov
• error: name the resolved specifier in unresolved import diagnostics (#11014) by @linyiru
• make entries-aware chunk merging deterministic (#11002) by @hyfdev
• watch: avoid restarting macOS watcher for unchanged paths (#10992) by @sep2

🚜 Refactor

• dev: ship the dev runtime entry as one file (#10998) by @h-a-n-a
• binding: remove __internalForcePanic (#10989) by @IWANABETHATGUY

📚 Documentation

• fix cloudflare preview builds (#10996) by @sapphi-red
• fix build config loader warning (#10994) by @sapphi-red
• deps: use Vite 8 (#10993) by @sapphi-red

⚡ Performance

• dev: only ship rows with dynamic edges in registerGraph (#11019) by @h-a-n-a

🧪 Testing

• code-splitting: cover more re-exported namespace shapes (#11042) by @hyfdev
• webcontainer: cover the WebContainer download fallback in plain Node (#10966) by @shulaoda
• dev: pin the runtime entry file layout that Vite serves (#10983) by @h-a-n-a

⚙️ Miscellaneous Tasks

• pin VOID_API_URL for the docs deploy (#11041) by @shulaoda
• opt into the WebContainer smoke test for napi bumps and loader changes (#10967) by @shulaoda
• deps: upgrade oxc to 0.152.0 (#11018) by @camc314
• deps: update rust crates (#11012) by @renovate[bot]
• deps: update npm packages (#11011) by @renovate[bot]
• deps: update crate-ci/typos action to v1.50.3 (#11023) by @renovate[bot]
• deps: update test262 submodule for tests (#11022) by @rolldown-guard[bot]
• deps: update rollup submodule for tests to v4.63.5 (#11021) by @rolldown-guard[bot]
• deps: update dependency vite-plus to v1 (#11017) by @renovate[bot]
• deps: update github actions (#11010) by @renovate[bot]
• remove CLAUDE.md (#10925) by @iiio2
• verify release debug info by matching file IDs (#10988) by @IWANABETHATGUY
• deps: update rollup submodule for tests to v4.63.4 (#10940) by @rolldown-guard[bot]

❤️ New Contributors

• @waltuov made their first contribution in #10986
• @linyiru made their first contribution in #11014
• @sep2 made their first contribution in #10992

🚀 Features

• watch: report only file events (#10974) by @shulaoda

🐛 Bug Fixes

• sourcemap: preserve names through collapse_sourcemaps (#9486) by @eoin
• watch: map metadata events by kind and missing paths as deleted (#10973) by @shulaoda

🚜 Refactor

• rolldown_fs_watcher: hand the handler file events instead of notify results (#10980) by @shulaoda
• rolldown_fs_watcher: share one event handler adapter between the notify watchers (#10979) by @shulaoda
• rolldown_fs_watcher: register every path with one watch mode (#10978) by @shulaoda
• rolldown_fs_watcher: tweak the backend traits and the event mapping (#10977) by @shulaoda
• watch: translate notify events inside FsWatcher (#10972) by @shulaoda

📚 Documentation

• watch: update the fs watcher layout and the dev coordinator message (#10981) by @shulaoda
• watch: document the event translation in FsWatcher (#10975) by @shulaoda

◀️ Revert

• "perf(dev/lazy): fetch a lazy route in one request" (#10789) (#10982) by @h-a-n-a

❤️ New Contributors

• @eoin made their first contribution in #9486

🚀 Features

• rolldown_plugin_esm_external_require: prefer 'module.exports' over a namespace spread (#10901) by @isker
• watch: support directories in addWatchFile (#10944) by @shulaoda
• label code-splitting timing rows (#10896) by @IWANABETHATGUY
• separate code-splitting group timing rows (#10892) by @IWANABETHATGUY
• clarify callback owners in the timing report (#10890) by @IWANABETHATGUY
• add checks.bundlerTimings with deprecated pluginTimings alias (#10883) by @IWANABETHATGUY

🐛 Bug Fixes

• code-splitting: initialize leaves behind a re-exported namespace import (#10694) by @hyfdev
• node: record the WASI target on the WebContainer binding fallback (#10952) by @shulaoda
• dev: force incremental build on in DevEngine::new (#10958) by @o-alexandrov
• tree-shaking: propagate side effects through cycles (#10893) by @IWANABETHATGUY
• deconflict CJS locals that shadow a renamed require wrapper (#10793) by @logaretm
• include group indexes in labeled codeSplitting timing rows (#10916) by @IWANABETHATGUY
• docs: type-check Algolia indices option (#10934) by @shulaoda
• docs: restore Algolia search (#10929) by @isker
• tell code-splitting timing rows apart by position (#10903) by @IWANABETHATGUY

🚜 Refactor

• rolldown_fs_watcher: remove the single-path API (#10950) by @shulaoda
• dev: register watch files through FsWatcher (#10949) by @shulaoda
• watch: let FsWatcher own the watched paths (#10948) by @shulaoda
• watch: identify watch files by normalized absolute path (#10943) by @shulaoda
• plugin: build a plugin-resolved ResolvedId in one place (#10921) by @IWANABETHATGUY

📚 Documentation

• dev: add HMR design, align dev docs and engine comments (#10271) by @h-a-n-a

⚡ Performance

• batch sourcemapPathTransform calls (#10763) by @IWANABETHATGUY
• batch sourcemapIgnoreList calls (#10762) by @IWANABETHATGUY
• hmr: drop the unused kind argument from registerFactory (#10915) by @h-a-n-a

🧪 Testing

• handle Windows paths in sourcemap callback tests (#10942) by @IWANABETHATGUY

⚙️ Miscellaneous Tasks

• replace custom ban-expect-assertions JS lint with builtin no-restricted-properties (#10933) by @isker
• deps: update napi (#10959) by @renovate[bot]
• deps: upgrade oxc to 0.151.0 (#10939) by @camc314
• deps: update test262 submodule for tests (#10941) by @rolldown-guard[bot]
• deps: update npm packages (#10931) by @renovate[bot]
• deps: update napi (#10928) by @renovate[bot]
• deps: update dependency vite-plus to v0.3.3 (#10914) by @renovate[bot]
• deps: update rust crates (#10932) by @renovate[bot]
• deps: update github actions (#10930) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to v0.28.6 (#10924) by @renovate[bot]
• deps: update crate-ci/typos action to v1.50.2 (#10917) by @renovate[bot]
• deps: update dependency @napi-rs/cli to v3.10.4 (#10913) by @renovate[bot]
• deps: update napi (#10897) by @renovate[bot]

❤️ New Contributors

• @o-alexandrov made their first contribution in #10958

🚀 Features

• add MODULE_LEVEL_DIRECTIVE warning (#10791) by @sapphi-red

🐛 Bug Fixes

• handle CommonJS exports through top-level this (#10872) by @IWANABETHATGUY
• scripts: make setup-vite CLI invocation work on Windows (#10885) by @shulaoda
• remove deleted property from output bundle proxy target (#10815) by @Vladexy88x
• treat module-scope await using as top-level await (#10739) by @MarshallOfSound
• watch: preserve plugin attribution in warnings (#10473) by @Nic-Polumeyv
• test-dev-server: link the workspace rolldown before building vite (#10857) by @h-a-n-a
• minify: preserve annotation comments when minified (#10854) (#10855) by @justonemorenight

⚡ Performance

• dev/lazy: fetch a lazy route in one request (#10789) by @h-a-n-a
• plugin: reduce binding binary size (#10776) by @Boshen
• vite-reporter: reuse emitted sourcemap sizes (#10841) by @hyfdev

🧪 Testing

• dev: full-bundle-mode regression test for cyclic import binding (#9946) (#9947) by @ShMcK
• cover asset option callback timings (#10870) by @IWANABETHATGUY

⚙️ Miscellaneous Tasks

• wait for npm bindings before publishing rolldown (#10866) by @shulaoda
• deps: update dependency @napi-rs/cli to v3.10.1 (#10889) by @renovate[bot]
• deps: update napi (#10888) by @renovate[bot]
• compress debug info archives with zstd (#10778) by @IWANABETHATGUY
• publish split debug info for release bindings (#10777) by @IWANABETHATGUY
• rolldown_utils: simplify MIME guessing and remove UTF-8 check bypass (#10884) by @shulaoda
• add npm bugs metadata for rolldown (#9694) by @kingshuaishuai
• deps: upgrade oxc to 0.150.0 (#10877) by @camc314
• deps: update rust crates (#10869) by @renovate[bot]
• deps: update dependency vite-plus to v0.3.2 (#10878) by @renovate[bot]
• deps: update rollup submodule for tests to v4.63.3 (#10880) by @rolldown-guard[bot]
• deps: update test262 submodule for tests (#10881) by @rolldown-guard[bot]
• deps: update github actions (#10867) by @renovate[bot]
• deps: update npm packages (#10868) by @renovate[bot]
• deps: update napi to v3.12.4 (#10862) by @renovate[bot]
• deps: update napi (#10861) by @renovate[bot]

❤️ New Contributors

• @Vladexy88x made their first contribution in #10815
• @MarshallOfSound made their first contribution in #10739
• @kingshuaishuai made their first contribution in #9694
• @ShMcK made their first contribution in #9947
• @justonemorenight made their first contribution in #10855

🚀 Features

• dev: add hotUpdate dev option to gate the hotUpdate hook (#10837) by @h-a-n-a
• docs: add wrangler (#10821) by @mdong1909

🐛 Bug Fixes

• dev: clean stale dynamic entry references after partial scans (#10846) by @shulaoda
• include external wildcard re-exports in OutputChunk.imports (#10845) by @isker

📚 Documentation

• document dynamic entry cache merging after partial scans (#10848) by @shulaoda

⚡ Performance

• cache getModuleInfo during code splitting (#10838) by @hyfdev

🧪 Testing

• dev: cover stale dynamic entry references after partial scans (#10847) by @shulaoda

⚙️ Miscellaneous Tasks

• deps: update dependency @napi-rs/cli to v3.9.0 (#10816) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to v0.28.5 (#10827) by @renovate[bot]
• deps: update dependency vite-plus to v0.3.1 (#10842) by @renovate[bot]
• deps: upgrade oxc to 0.149.0 (#10834) by @camc314
• deps: update rust crates (#10830) by @renovate[bot]
• deps: update npm packages (#10832) by @renovate[bot]
• deps: update crate-ci/typos action to v1.50.1 (#10824) by @renovate[bot]
• deps: update test262 submodule for tests (#10836) by @rolldown-guard[bot]
• deps: update github actions (#10831) by @renovate[bot]
• deps: update dependency rust to v1.98.1 (#10819) by @renovate[bot]

❤️ New Contributors

• @isker made their first contribution in #10845

🐛 Bug Fixes

• rolldown_binding: make PreRenderedChunk.facadeModuleId nullable like Rollup (#10810) by @IWANABETHATGUY
• plugin_timings: reword the warning so it does not contradict itself (#10788) by @IWANABETHATGUY
• model a facade's host import in the fold cycle check (#10743) by @ulrichstark

🧪 Testing

• dev: add circular reexport test (#10563) by @sapphi-red

⚙️ Miscellaneous Tasks

• deps: update npm packages (#10795) by @renovate[bot]
• deps: update rust crates (#10794) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to v0.28.3 (#10805) by @renovate[bot]
• renovate: disable oxc auto-updates (#10813) by @IWANABETHATGUY
• deps: upgrade oxc to 0.148.0 (#10809) by @camc314
• deps: update pnpm to v11.24.0 (#10803) by @renovate[bot]
• deps: update crate-ci/typos action to v1.50.0 (#10806) by @renovate[bot]
• deps: update test262 submodule for tests (#10808) by @rolldown-guard[bot]
• deps: update rollup submodule for tests to v4.63.1 (#10807) by @rolldown-guard[bot]
• deps: update crate-ci/typos action to v1.49.1 (#10796) by @renovate[bot]
• deps: update github actions (#10749) by @renovate[bot]

🚀 Features

• minify: support property name mangling (#10374) by @Dunqing
• add tsconfig: string option to transform (#10727) by @sapphi-red
• rolldown_plugin_vite_transform: add tsconfig option (#10725) by @sapphi-red
• rolldown_plugin_vite_resolve: add top-level tsconfig option (#10724) by @sapphi-red
• dev: expose module graph queries on the dev engine handle (#10716) by @h-a-n-a

🐛 Bug Fixes

• dev: assign import bindings before initializing dependencies (#10783) by @h-a-n-a
• dev: copy star re-exports before initializing dependencies (#10761) by @h-a-n-a
• dev: register an empty exports object for a module without exports (#10772) by @h-a-n-a
• name the module when a codeSplitting group callback returns a wrong type (#10753) by @IWANABETHATGUY
• dev: map dev rename events like build watch (#10758) by @shulaoda
• clear resolution cache when TsconfigCache::clear is called (#10726) by @sapphi-red
• dev: resolve in-flight ensureLatestBuildOutput when the engine closes (#10730) by @h-a-n-a
• binding: replace undeclared BindingErrorsOr with BindingResult in hook types (#10717) by @h-a-n-a

🚜 Refactor

• rolldown_fs_watcher: collapse fs-watcher backends behind a single FsWatcher (#10735) by @shulaoda
• hoist invariants out of the codeSplitting group loop (#10744) by @IWANABETHATGUY

📚 Documentation

• document shared notify rename mapping (#10759) by @shulaoda
• update watch-mode internals for unified FsWatcher (#10736) by @shulaoda

⚡ Performance

• batch codeSplitting group test / name calls (#10745) by @IWANABETHATGUY
• deduplicate used symbol ref readers (#10742) by @Boshen
• reduce release debug formatting (#10728) by @Boshen
• enable compiler cache via module.enableCompileCache() (#10678) by @btea
• deduplicate regress codegen (#10732) by @Boshen

🧪 Testing

• define: add expected failure for default parameter scope (#10780) by @hyfdev
• use an absolute filename for transform tsconfig path (#10782) by @shulaoda

⚙️ Miscellaneous Tasks

• deps: upgrade oxc to 0.147.0 (#10767) by @camc314
• deps: update resolver dependencies (#10766) by @Boshen
• deps: update rollup submodule for tests to v4.62.5 (#10770) by @rolldown-guard[bot]
• deps: update dependency vite-plus to ^0.3.0 (#10757) by @renovate[bot]
• deps: update npm packages (#10750) by @renovate[bot]
• deps: update rust crates (#10748) by @renovate[bot]
• deps: update rust crate napi to v3.12.2 (#10738) by @renovate[bot]
• deps: update dependency rust to v1.98.0 (#10733) by @renovate[bot]
• wasi: cap each Node Test attempt with timeout to survive hangs (#10709) by @hyfdev

🚀 Features

• bench: record per-suite peak memory in the node benchmark (#10704) by @IWANABETHATGUY
• binding: allocation-tracking global allocator behind the tracking_allocator feature (#10703) by @IWANABETHATGUY
• add armv7 android (armv7-linux-androideabi) support (#10691) by @shulaoda
• add NAMESPACE_CONFLICT warning for conflicting star re-exports (#7452) by @AliceLanniste

🐛 Bug Fixes

• rolldown_plugin_vite_reporter: avoid ANSI erase-line escape in non-TTY output (#10692) by @shulaoda
• rolldown_plugin_vite_resolve: preserve Yarn PnP virtual importer (#10591) by @Freakazo
• exclude hash placeholders from case-insensitive filename deconfliction (#10590) by @Nic-Polumeyv
• code-splitting: fold already-loaded side-effectful libraries into eager entries (#10645) by @JoviDeCroock
• dev: flush re-emitted assets when their content changes (#10637) by @btea
• renamer: rename nested require/__filename/__dirname bindings in CJS output (#10655) by @marcoroth
• silence two wasm-only warnings (#10668) by @IWANABETHATGUY

🚜 Refactor

• skip case folding for filenames with hash placeholders (#10689) by @hyfdev
• code-splitting: remove redundant synthetic statement owner (#10503) by @hyfdev
• renamer: move the cjs check into rename_bindings_shadowing_cjs_ambient_names (#10672) by @IWANABETHATGUY

📚 Documentation

• agents: point the never-edit list at the binding files that exist (#10719) by @melbinjp

🧪 Testing

• deconflict: pin renaming the external process binding away from the global (#10702) by @hyfdev
• dev: expect a hot update across a circular import (#10700) by @hyfdev

⚙️ Miscellaneous Tasks

• deps: upgrade oxc to 0.146.0 (#10707) by @Boshen
• deps: update rust crates (#10684) by @renovate[bot]
• deps: update npm packages (#10685) by @renovate[bot]
• build the benchmark comparison window from the JSON lines (#10701) by @IWANABETHATGUY
• wasi: retry the Node Test step to absorb the shared-dlmalloc flake (#10699) by @hyfdev
• append benchmark results to storage as JSON lines (#10682) by @IWANABETHATGUY
• deps: update github actions (#10683) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to v0.28.2 (#10679) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to v0.28.1 (#10674) by @renovate[bot]

❤️ New Contributors

• @melbinjp made their first contribution in #10719
• @Freakazo made their first contribution in #10591
• @marcoroth made their first contribution in #10655

🚀 Features

• code-splitting: widen namespace extraction for already-loaded merges (#10594) by @IWANABETHATGUY

🐛 Bug Fixes

• binding: illegal instruction crash on Android arm64 (#10638) by @shulaoda
• code-splitting: stop negated sideEffects globs retaining modules (#10660) by @JoviDeCroock
• devtools: resolve log paths against the build cwd (#10622) by @hyfdev

📚 Documentation

• plugin-api: document sourcemap differences from Rollup (#10636) by @IWANABETHATGUY

🧪 Testing

• browser: smoke test the packed @rolldown/browser in a real browser page (#10634) by @hyfdev
• node-wasi: run the full node test suite against the WASI binding (#10616) by @hyfdev
• webcontainer: smoke test the packed WASI artifacts inside a WebContainer (#10626) by @hyfdev

⚙️ Miscellaneous Tasks

• deps: update napi (#10649) by @renovate[bot]
• deps: update esbuild for tests to 0.28.2 (#10662) by @rolldown-guard[bot]
• deps: update test262 submodule for tests (#10663) by @rolldown-guard[bot]
• deps: update npm packages (#10653) by @renovate[bot]
• deps: update github actions (#10651) by @renovate[bot]
• deps: update crate-ci/typos action to v1.49.0 (#10642) by @renovate[bot]
• deps: update dependency vite-plus to v0.2.9 (#10627) by @renovate[bot]
• deps: update rust crates (#10652) by @renovate[bot]
• deps: upgrade oxc to 0.144.0 (#10657) by @camc314
• ignore napi-rs temp files (#10658) by @camc314
• deps: tighten @napi-rs/wasm-runtime range to ~1.2.2 (#10615) by @hyfdev
• wasi: point the wasm skips at the right place (#10644) by @hyfdev

🐛 Bug Fixes

• dev: don't let a failed watch registration abort the batch (#10548) by @shulaoda

🚜 Refactor

• remove deprecated watch.notify option (#10628) by @sapphi-red

📚 Documentation

• fix the dangling spec link on generate_minified_names (#10617) by @IWANABETHATGUY

⚡ Performance

• reduce finalization memory usage (#10554) by @ericclemmons
• chunk-naming: build minified export names without allocating (#10618) by @IWANABETHATGUY

🧪 Testing

• resolve-file-url: allow a reference id to start with a digit (#10623) by @jjb
• code-splitting: pin the already-loaded namespace-extraction boundaries (#10593) by @IWANABETHATGUY

⚙️ Miscellaneous Tasks

• deps: upgrade oxc to 0.143.0 (#10603) by @camc314
• deps: update rollup submodule for tests to v4.62.4 (#10607) by @rolldown-guard[bot]
• deps: update test262 submodule for tests (#10608) by @rolldown-guard[bot]

❤️ New Contributors

• @ericclemmons made their first contribution in #10554
• @jjb made their first contribution in #10623

🚀 Features

• code-splitting: support inlining of shared deps in dynamic entries (#10526) by @nicolo-ribaudo
• plugin: time the user callbacks configured on the options (#10509) by @IWANABETHATGUY

🐛 Bug Fixes

• dev: force cleanDir off in dev mode (#10579) by @shulaoda
• dev: keep ?rolldown-lazy proxy ids out of user resolveId hooks (#10580) by @btea
• initialize re-exported wrapped ESM modules at the entry chunk (#10567) by @hyfdev
• link: resolve circular star reexports as null (#10445) by @Nic-Polumeyv
• transform: transformer gate skips newer syntax that oxc can lower (#10564) by @sekyungk
• code-splitting: materialize consumer-local barrel routing when the order-wrap plan is empty (#10544) by @hyfdev
• plugin: measure plugin hooks in JavaScript, report them from Rust (#10508) by @IWANABETHATGUY
• plugin: include external dynamic imports in chunk metadata (#10557) by @hyfdev
• plugin: report plugin timings after closeBundle has run (#10521) by @IWANABETHATGUY
• browser: avoid using node builtin modules (#10542) by @sapphi-red

🚜 Refactor

• plugin: give the build's own clocks their own type (#10520) by @shulaoda

📚 Documentation

• correct stale buildStart comment in ScanStageCache::merge (#10577) by @shulaoda
• update outdated pluginutils references (#10574) by @dogledogle

⚡ Performance

• external: drop the runtime import from chunks that never wrap (#10517) by @IWANABETHATGUY
• plugin: clock the build only when it is being measured (#10558) by @IWANABETHATGUY

🧪 Testing

• vite-tests: drop the dead @rolldown/pluginutils pnpm override (#10575) by @IWANABETHATGUY
• transform: group the transform-target fixtures and say why each exists (#10569) by @IWANABETHATGUY
• dev: fix hmr-hot-update-hook-vite fixture on Windows (#10565) by @h-a-n-a
• dev: match Vite's renamed full-reload log (#10547) by @shulaoda

⚙️ Miscellaneous Tasks

• deps: update napi (#10576) by @renovate[bot]
• deps: bump @napi-rs/wasm-runtime to 1.2.2 (#10570) by @shulaoda
• deps: update npm packages (#10583) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to ^0.28.0 (#10588) by @renovate[bot]
• deps: update taiki-e/install-action action to v2.85.5 (#10587) by @renovate[bot]
• deps: update codspeedhq/action action to v5 (#10584) by @renovate[bot]
• deps: update github actions (#10582) by @renovate[bot]
• deps: update rust crates (#10581) by @renovate[bot]
• deps: update dependency vite-plus to v0.2.7 (#10568) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to v0.27.14 (#10531) by @renovate[bot]
• deps: update pnpm to v11.17.0 (#10571) by @renovate[bot]
• deps: update @napi-rs/wasm-runtime to 1.2.1 (#10545) by @sapphi-red

❤️ New Contributors

• @sekyungk made their first contribution in #10564
• @nicolo-ribaudo made their first contribution in #10526

🚀 Features

• dev: support hotUpdate hook (#10305) by @h-a-n-a
• dev: expose disableWatcher through the dev engine bindings (#10474) by @shulaoda
• plugin: surface output-option callbacks in [PLUGIN_TIMINGS] (#10411) by @IWANABETHATGUY
• import.meta.ROLLDOWN_FILE_URL_<referenceId>_<urlId> support to pass context to resolveFileUrl hook (#10297) by @sapphi-red
• dev: skip the HMR update when a module's rebuilt output is unchanged (#10333) by @h-a-n-a
• code-splitting: wrap strict execution order modules on demand (#10104) by @hyfdev
• support import.meta.ROLLDOWN_FILE_URL_* (#10296) by @sapphi-red
• implement resolveFileUrl plugin hook (#10291) by @sapphi-red
• magic-string: support storeName on overwrite/update (#10312) by @IWANABETHATGUY

🐛 Bug Fixes

• external: keep __toESM when the importing module is tree-shaken (#10516) by @IWANABETHATGUY
• dev: resolve re-exports from externals through a real import (#10489) by @tbvjaos510
• code-splitting: route CJS barrel initialization per consumer (#10488) by @hyfdev
• error: align filename-pattern diagnostics with Rollup's wording (#10501) by @IWANABETHATGUY
• plugin: validate emitted prebuilt-chunk file names (#10399) by @IWANABETHATGUY
• code-splitting: point a two-argument dynamic import at the chunk that holds the module (#10479) by @hyfdev
• common: align is_path_fragment with Rollup's isPathFragment (#10398) by @IWANABETHATGUY
• code-splitting: never name an internal chunk export then (#10480) by @hyfdev
• code-splitting: avoid creating call-site-triggered entry facades (#10485) by @hyfdev
• code-splitting: collect top-level eager order reasons in every strict build (#10463) by @hyfdev
• code-splitting: let a cross-chunk dynamic importer carry the order trigger (#10456) by @hyfdev
• code-splitting: avoid the dynamic-entry facade when the same-chunk collapse carries the trigger (#10433) by @hyfdev
• binding: forward resolveId options.kind to callable builtin plugins (#10440) by @IWANABETHATGUY
• dev: keep the export name of export * as ns from (#10476) by @tbvjaos510
• code-splitting: only split an entry facade when something else can load its chunk (#10441) by @hyfdev
• code-splitting: fold the runtime chunk back after order lowering (#10414) by @hyfdev
• runtime: don't leave default undefined for cjs that fakes __esModule (#10453) by @IWANABETHATGUY
• import-glob: escape generated string literals (#10438) by @shantanuraj
• preserve-modules: don't assume every chunk mirrors a module (#10442) by @hyfdev
• filter: treat missing hook inputs as non-matches, not panics (#10443) by @IWANABETHATGUY
• code-splitting: keep CommonJS modules wrapped under strict execution order (#10405) by @hyfdev
• code-splitting: align dynamicImports metadata with the rewritten import() specifier (#10430) by @hyfdev
• dev: skip user plugin hooks for ?rolldown-lazy proxy modules (#10426) by @unknownjedi
• treeshake: preserve side-effect-free spread arguments in manual-pure chains (#10432) by @IWANABETHATGUY
• treeshake: preserve eagerly evaluated child effects of manual pure chains (#10427) by @Nic-Polumeyv
• code-splitting: initialize pure definers behind star re-export barrels under strict execution order (#10409) by @hyfdev
• resolveId: reject string id filters (must be a RegExp) (#10412) by @IWANABETHATGUY
• code-splitting: collect eager order reasons for on-demand wrapping (#10387) by @hyfdev
• rolldown: apply output.paths to CJS export-star of external modules (#10406) by @IWANABETHATGUY
• dev: sourcemaps of lazily compiled chunks (#10386) by @tbvjaos510
• plugin: validate emitted file names at emitFile time (#10377) by @Nic-Polumeyv
• guarantee tokio runtime release when close rejects (#10381) by @shulaoda
• code-splitting: make strict transitive init registration deterministic and constant-time (#10320) by @hyfdev
• pair tokio runtime acquire and release on wasm to prevent premature shutdown (#10363) by @shulaoda
• don't body-demand modules from simulated facade chunk includes (#10351) by @IWANABETHATGUY
• tracing: invalid RD_LOG filter and RD_LOG_OUTPUT=json no longer panic (#10343) by @Brooooooklyn
• code-splitting: treat class definition-time global reads as order-sensitive (#10322) by @hyfdev
• code-splitting: deconflict force-included runtime helper statements (#10336) by @hyfdev
• binding: forward all missing parallel JS plugin hooks (#10345) by @Brooooooklyn
• code-splitting: re-derive chunk exec order after the runtime sweep (#10334) by @hyfdev
• types: add undefined to ExistingRawSourceMap optional properties (#10355) by @ocavue
• magic-string: validate relocate ranges before rewiring (#10327) by @IWANABETHATGUY
• add EMPTY_IMPORT_META warning for non-node CJS output (#10222) by @sapphi-red
• call resolveFileUrl in a deterministic order (#10330) by @sapphi-red
• magic-string: refuse repeated sendMagicString on a consumed instance (#10331) by @IWANABETHATGUY
• magic-string: refuse to use a MagicString after sendMagicString consumed it (#10326) by @IWANABETHATGUY
• magic-string: reject non-contiguous moves before rewiring the chunk list (#10311) by @IWANABETHATGUY
• handle ./foo/bar glob pattern the same as foo/bar (#10313) by @sapphi-red
• magic-string: throw instead of panicking when append/prepend splits an edited chunk (#10301) by @IWANABETHATGUY
• output: skip separator for empty hoisted functions (#10310) by @hyfdev
• magic-string: don't report a change when edits cancel out (#10299) by @IWANABETHATGUY
• sourcemap: map wrapped imported callees (#10288) by @hyfdev
• magic-string: count positional inserts at index 0 on an empty source (#10306) by @IWANABETHATGUY
• magic-string: return UTF-16 code units from length() (#10295) by @IWANABETHATGUY
• output: skip separator for empty import prelude (#10289) by @hyfdev

🚜 Refactor

• dev: make it easier to customize the runtime (#10338) by @sapphi-red
• code-splitting: declare CJS carrier namespaces initializer-free (#10513) by @hyfdev
• rollup-tests: avoid relying on NODE_PATH env var resolution (#10496) by @sapphi-red
• code-splitting: derive symbol chunk ownership as pass-local link data (#10449) by @hyfdev
• plugin: share asset emission helpers between copy_module and asset_module (#10450) by @Nic-Polumeyv
• plugin: dedupe hook binding boilerplate (#10428) by @Nic-Polumeyv
• plugin: share the oxc parse preamble between import-glob and dynamic-import-vars (#10452) by @Nic-Polumeyv
• implement GetAstBuilder on visitor/pass types (#10424) by @overlookmotel
• pass arrays to AST builder methods (#10419) by @overlookmotel
• shorten AST builder code (#10418) by @overlookmotel
• centralize final ESM init metadata (#10376) by @hyfdev
• descriptor-based parallel-plugin detection (getParallelPluginInfo) (#10349) by @Brooooooklyn
• remove AstFactory in favor of new_* construction traits (#10353) by @Boshen
• enable oxc_ast's disable_old_builder feature (#10316) by @Boshen

📚 Documentation

• development-guide: update config.json link line reference (#10523) by @dogledogle
• clarify slash normalization for id hook filter (#10511) by @sapphi-red
• code-splitting: record the thenable-namespace rule (#10502) by @hyfdev
• clarify that esmExternalRequirePlugin must own its externals (#10439) by @TheAlexLichter
• add troubleshooting entry for the @rolldown/binding-... resolution error (#10390) by @Nic-Polumeyv
• add Code Splitting API reference category (#10382) by @vittorioexp

⚡ Performance

• use VisitJsMut in JavaScript-only AST passes (#10507) by @Boshen
• cache the resolved glob matcher for Id/ImporterId filters (#10410) by @IWANABETHATGUY
• scope_hoisting: remove alloc field from ScopeHoistingFinalizer (#10425) by @overlookmotel
• reduce string allocations (#10423) by @overlookmotel
• hmr: remove unnecessary string allocations (#10422) by @overlookmotel
• avoid allocating static strings via custom builder methods (#10421) by @overlookmotel
• pass string literals to AST builder methods (#10420) by @overlookmotel
• use VisitJs in JavaScript-only AST passes (#10396) by @Boshen
• plugin: shrink erased plugin debug vtables (#10370) by @Boshen
• reuse normalized path buffers (#10315) by @hyfdev

🧪 Testing

• code-splitting: pin CJS barrel fallback triggers and flag-off equivalence (#10514) by @hyfdev
• plugin: cover chunk fileName, absolute chunk name, and Windows drive names (#10400) by @IWANABETHATGUY
• code-splitting: cover a single-chunk dynamic import of a wrapped module (#10505) by @hyfdev
• file: remove the unused .dynamic_import fixture (#10481) by @hyfdev
• treeshake: reduce manual-pure fixture to a minimal smoke test, move matrix to unit tests (#10436) by @IWANABETHATGUY
• dev: run vite playgrounds under bundled dev (test-serve-bundled) (#10434) by @h-a-n-a
• stop snapshots from silently hiding user code inside the runtime region (#10431) by @hyfdev
• wasi: add tokio runtime lifecycle regression test (#10379) by @shulaoda
• dev: expect preserved hot.data in hmr-whole-chain-dispose (#10380) by @h-a-n-a
• code-splitting: pin flag-off wrapped-esm init emission (#10324) by @hyfdev
• sourcemap: fix Windows-only failures in composition fixtures (#10368) by @shulaoda
• generated-code: mark assert external in symbols_ns2 for deterministic output (#10339) by @hyfdev
• code-splitting: cover entries-aware strict init cycle (#10307) by @hyfdev
• make just setup-vite the only entry point that touches vite/ (#10332) by @shulaoda
• vite-tests: reuse the shared root vite checkout (#10325) by @shulaoda
• test-dev-server: drop the vite submodule, track rolldown-canary (#10319) by @shulaoda
• vite-tests: track the latest rolldown-canary rebased onto vite main (#10318) by @shulaoda
• unify Vite in vite-test and test-dev-server (#10293) by @h-a-n-a

⚙️ Miscellaneous Tasks

• scope the binding artifact download to bindings-* (#10525) by @shulaoda
• deps: update napi (#10506) by @renovate[bot]
• deps: update rollup submodule for tests to v4.62.3 (#10494) by @rolldown-guard[bot]
• deps: upgrade oxc to 0.142.0 (#10497) by @shulaoda
• deps: update test262 submodule for tests (#10495) by @rolldown-guard[bot]
• deps: update github actions (#10460) by @renovate[bot]
• deps: update rust crates (#10462) by @renovate[bot]
• deps: update npm packages (#10461) by @renovate[bot]
• metric: alert Discord when the metric workflow fails (#10447) by @IWANABETHATGUY
• metric: mint a short-lived GitHub App token instead of a PAT (#10446) by @IWANABETHATGUY
• repo: repair dangling CLAUDE.md symlink (#10451) by @hanayashiki
• publint/package-metadata fixes and small correctness fixes (#10344) by @Brooooooklyn
• deps: update dependency vite-plus to v0.2.6 (#10404) by @renovate[bot]
• add Semgrep scan workflow (#10395) by @Boshen
• enable Windows CI with a PR label (#10375) by @hyfdev
• deps: upgrade oxc to 0.141.0 (#10373) by @camc314
• deps: update napi (#10369) by @renovate[bot]
• deps: update test262 submodule for tests (#10367) by @rolldown-guard[bot]
• deps: update taiki-e/install-action action to v2.83.3 (#10358) by @renovate[bot]
• deps: update rust crates (#10357) by @renovate[bot]
• deps: update npm packages (#10359) by @renovate[bot]
• deps: update rust crate syn to v3 (#10362) by @renovate[bot]
• deps: update rust crate oxc_sourcemap to v8.1.2 (#10356) by @renovate[bot]
• deps: update dependency vite-plus to v0.2.5 (#10329) by @renovate[bot]
• docs: migrate Netlify redirects to Void config (#10282) by @tux-tn
• deps: update dependency rust to v1.97.1 (#10317) by @renovate[bot]
• runtime: remove unused runtime/index.js (#10302) by @IWANABETHATGUY

❤️ New Contributors

• @dogledogle made their first contribution in #10523
• @tbvjaos510 made their first contribution in #10489
• @martijnwalraven made their first contribution in #10440
• @shantanuraj made their first contribution in #10438
• @Nic-Polumeyv made their first contribution in #10450
• @hanayashiki made their first contribution in #10451
• @unknownjedi made their first contribution in #10426
• @vittorioexp made their first contribution in #10382

🚀 Features

• dev: skip shipping factories for newly imported top-level modules (#10223) by @h-a-n-a
• dev: per-client ship map for HMR patch sizing (#10208) by @h-a-n-a
• dev: client-side HMR (#10164) by @h-a-n-a
• dev: send a full-reload update to clients when a tsconfig changes (#10262) by @shulaoda
• treat import.meta['url'] and import.meta['ROLLUP_FILE_URL_*'] as side-effect free (#10267) by @sapphi-red
• rewrite import.meta['url'] (#10251) by @sapphi-red
• add FILE_NOT_FOUND error (#10220) by @sapphi-red
• treat import.meta.ROLLUP_FILE_URL_* as side-effect free (#10217) by @sapphi-red

🐛 Bug Fixes

• sourcemap: preserve unmapped boundaries during composition (#10254) by @hyfdev
• [format] in *FileNames option for ESM format should be es instead of esm (#10214) by @sapphi-red
• sourcemap: preserve coarse mappings during composition (#10249) by @hyfdev
• rolldown_plugin_vite_import_glob: support tsconfig paths with import.meta.glob (#10167) by @sapphi-red
• dev: clear tsconfig caches for bare full builds (#10276) by @shulaoda
• dev: force a full rebuild when a tsconfig changes (#10261) by @shulaoda
• treat rooted drive-less module ids as absolute in preserveModules naming (#10235) by @IWANABETHATGUY
• watch: rebuild when tsconfig files change (#10258) by @shulaoda
• watch: drop tsconfig-merged transform options on each rebuild (#10257) by @shulaoda
• incorrect EMPTY_IMPORT_META warning for import.meta.ROLLUP_FILE_URL_* for CJS output (#10221) by @sapphi-red
• deconflict: rename CJS locals shadowing wrapped-ESM namespace objects (#9970) by @IWANABETHATGUY
• rolldown: drop the unused runtime module after entry-level external flattening (#10237) by @IWANABETHATGUY
• rolldown: re-propagate has_dynamic_exports to transitive star importers (#10239) by @IWANABETHATGUY
• tree-shaking: tree-shake destructured dynamic import namespace bindings (#10213) by @logaretm
• s390x: use json-escape-simd 3.1.1 for big-endian JSON escaping fix (#10211) by @satyamg1620

🚜 Refactor

• dev: move full-reload to client side (#10207) by @h-a-n-a
• readability follow-ups to the ReplaceWith migration (#10286) by @IWANABETHATGUY
• replace take_in-then-write-back with ReplaceWith and by-value moves (#10285) by @Boshen
• share the main resolver's cache with the transformer's tsconfig lookups (#10205) by @shulaoda
• rolldown: extract the ns star-external __reExport emission rule into LinkingMetadata (#10238) by @IWANABETHATGUY
• rolldown: unify link/generate diagnostics into a Diagnostics accumulator (#10234) by @IWANABETHATGUY
• sourcemap_filenames: drop dead sourcemap-filename plumbing (#10189) by @IWANABETHATGUY
• extract external import symbol merging into a method (#10224) by @IWANABETHATGUY
• rolldown: skip CJS namespace merging under strict execution order (#10203) by @hyfdev
• resolve the manual tsconfig per file instead of once at startup (#10200) by @shulaoda
• rolldown: route interop ESM init emission through a shared init-target view (#10202) by @hyfdev
• rolldown: collapse vestigial wrap-kind state and share chunk sort helper (#10201) by @hyfdev

📚 Documentation

• show plugin kinds in JSDoc and each hook's description (#10218) by @sapphi-red
• add an explanation about removing imports from external modules without any messages (#10215) by @sapphi-red

⚡ Performance

• sourcemap: owned merge in SourceJoiner::join (4005->5 allocs/chunk) (#10250) by @Boshen
• avoid redundant sourcemap string copies in collapse and minify paths (#10093) by @Boshen

🧪 Testing

• code-splitting: establish strict-order review baselines (#10287) by @hyfdev
• dev: add hot API test cases (#10181) by @h-a-n-a
• code-splitting: normalize strict execution order variants (#10277) by @hyfdev
• code-splitting: harden strict execution order coverage (#10252) by @hyfdev
• code-splitting: add strict execution order regressions (#10253) by @hyfdev

⚙️ Miscellaneous Tasks

• deps: update github actions (#10241) by @renovate[bot]
• deps: update oxc to 0.140.0 (#10274) by @shulaoda
• update Yunfei's GitHub username (#10275) by @hyfdev
• deps: update napi (#10260) by @renovate[bot]
• deps: update test262 submodule for tests (#10266) by @rolldown-guard[bot]
• deps: update dependency vite-plus to v0.2.4 (#10256) by @renovate[bot]
• deps: update napi (#10240) by @renovate[bot]
• deps: update oxc resolver to v11.24.2 (#10245) by @renovate[bot]
• deps: update rust crates (#10244) by @renovate[bot]
• disable Renovate updates for idna_adapter (#10248) by @shulaoda
• deps: update oxc resolver to v11.24.1 (#10232) by @renovate[bot]
• deps: update rust crate oxc_sourcemap to v8.1.1 (#10233) by @renovate[bot]
• deps: update dependency rolldown-plugin-dts to ^0.27.0 (#10206) by @renovate[bot]
• deps: upgrade sugar_path to v3 (#10230) by @hyfdev
• add dist-* to .gitignore in sourcemap-filenames/hash-final-content fixture (#10216) by @sapphi-red
• deps: update dependency rust to v1.97.0 (#10209) by @renovate[bot]

❤️ New Contributors

• @satyamg1620 made their first contribution in #10211