Cloudflare workerd

What's Changed

• 11-07-25 Roll deps by @fhanau in https://github.com/cloudflare/workerd/pull/5477
• Fix broken headers benchmark by @jasnell in https://github.com/cloudflare/workerd/pull/5478
• [nfc] Rename *CustomEventImpl -> *CustomEvent by @fhanau in https://github.com/cloudflare/workerd/pull/5443
• fixing benchmarks setup by @mikea in https://github.com/cloudflare/workerd/pull/5472
• fix use-after-move by @mikea in https://github.com/cloudflare/workerd/pull/5479

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251107.0...v1.20251108.0

What's Changed

• use shared buffer for retrieving random bytes by @anonrig in https://github.com/cloudflare/workerd/pull/5444
• Move bazelproject to CLion's preferred location by @ujohnny in https://github.com/cloudflare/workerd/pull/5463
• Small tweaks to FormData boundary generation by @jasnell in https://github.com/cloudflare/workerd/pull/5469
• Set error tag by @danlapid in https://github.com/cloudflare/workerd/pull/5471
• Only store status text if necessary by @jasnell in https://github.com/cloudflare/workerd/pull/5470
• smaller exceptions by @mikea in https://github.com/cloudflare/workerd/pull/5464
• Support boringssl EVP_AEAD interface by @npaun in https://github.com/cloudflare/workerd/pull/5202
• Add v8::String::IsFlat API by @jasnell in https://github.com/cloudflare/workerd/pull/5474

New Contributors

• @ujohnny made their first contribution in https://github.com/cloudflare/workerd/pull/5463

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251106.1...v1.20251107.0

What's Changed

• Revert unwanted changes to trace_events by @vicb in https://github.com/cloudflare/workerd/pull/5467
• ci: ensure the workers-types release uses the correct npm version for… by @petebacondarwin in https://github.com/cloudflare/workerd/pull/5468

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251106.0...v1.20251106.1

What's Changed

• EW-9182 Add assertion to detect timeout ID generator mismatches by @harrishancock in https://github.com/cloudflare/workerd/pull/3867
• feat: Add hard timeout support to container startup by @Talador12 in https://github.com/cloudflare/workerd/pull/5280
• Float the WriteUtf8V2 patch by @jasnell in https://github.com/cloudflare/workerd/pull/5465
• [build] Implement a couple more clang-tidy checks by @fhanau in https://github.com/cloudflare/workerd/pull/5466

New Contributors

• @Talador12 made their first contribution in https://github.com/cloudflare/workerd/pull/5280

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251105.0...v1.20251106.0

What's Changed

• fix trace_events Node.js compatibility problems by @petebacondarwin in https://github.com/cloudflare/workerd/pull/5456
• Add startup exceptions to traces by @danlapid in https://github.com/cloudflare/workerd/pull/5453
• clang-tidy: google-readability-casting, modernize-use-using by @npaun in https://github.com/cloudflare/workerd/pull/5423
• Fix double setting error.type tag. by @mar-cf in https://github.com/cloudflare/workerd/pull/5459
• Add WASM module support to worker-loader by @danlapid in https://github.com/cloudflare/workerd/pull/5462
• Reprl for Fuzzilli fuzzing by @mschwarzl in https://github.com/cloudflare/workerd/pull/4917
• Fix #include in the middle of the file. by @kentonv in https://github.com/cloudflare/workerd/pull/5458
• Add user exception metadata to internal exception by @danlapid in https://github.com/cloudflare/workerd/pull/5454

New Contributors

• @mschwarzl made their first contribution in https://github.com/cloudflare/workerd/pull/4917

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251104.0...v1.20251105.0

What's Changed

• make Immediate class thread-safe by @anonrig in https://github.com/cloudflare/workerd/pull/5207
• Update dependencies by @workers-devprod in https://github.com/cloudflare/workerd/pull/5451
• Fix R2 tracing to use unique tags for each checksum type instead of overwriting shared tags by @mar-cf in https://github.com/cloudflare/workerd/pull/5252
• [o11y] Elide span tag string allocations for string literals/when not being traced by @fhanau in https://github.com/cloudflare/workerd/pull/5435
• Enable ctx.exports by default at compat date 2025-11-17. by @kentonv in https://github.com/cloudflare/workerd/pull/5455

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251101.0...v1.20251104.0

What's Changed

• Add tailStream method to rpc.d.ts by @penalosa in https://github.com/cloudflare/workerd/pull/5447
• Avoid unnecessary string allocations/copies in events by @jasnell in https://github.com/cloudflare/workerd/pull/5446

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251031.0...v1.20251101.0

What's Changed

• Minor improvements to MimeType by @jasnell in https://github.com/cloudflare/workerd/pull/5437
• Revert "Merge pull request #5428 from cloudflare/jasnell/replace-body… by @harrishancock in https://github.com/cloudflare/workerd/pull/5439
• Lazily generate InvocationSpanContext in IoContext by @jasnell in https://github.com/cloudflare/workerd/pull/5441
• EW-9632 Remove websocket-max-message-size-32m autogate by @harrishancock in https://github.com/cloudflare/workerd/pull/5440

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251030.0...v1.20251031.0

What's Changed

• Some of the benchmark updates from the headers change by @jasnell in https://github.com/cloudflare/workerd/pull/5429
• Refactoring ReadableStreamSource/WritableStreamSink by @jasnell in https://github.com/cloudflare/workerd/pull/5212
• Implements Python error hint when importing from src. by @dom96 in https://github.com/cloudflare/workerd/pull/5407
• Replace BodyInputStream with MemoryInputStream by @jasnell in https://github.com/cloudflare/workerd/pull/5428
• [nfc] STW refactor and cleanup by @fhanau in https://github.com/cloudflare/workerd/pull/5377
• [nfc] Enable more clang-tidy checks by @fhanau in https://github.com/cloudflare/workerd/pull/5426
• [Instrumentation] Add attributes to synchronous KV operations by @jmorrell-cloudflare in https://github.com/cloudflare/workerd/pull/5277
• Fix tail stream handler lifetime using reverse ownership pattern by @mar-cf in https://github.com/cloudflare/workerd/pull/5425

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251029.0...v1.20251030.0

What's Changed

• [build] Expand clang-tidy, clang-format coverage by @fhanau in https://github.com/cloudflare/workerd/pull/5415
• cleanup bazel deps/implementation_deps by @anonrig in https://github.com/cloudflare/workerd/pull/5418
• Improve implementation of jsg::Generator/AsyncGenerator by @jasnell in https://github.com/cloudflare/workerd/pull/5417
• [build] Fix macOS-cross build by @fhanau in https://github.com/cloudflare/workerd/pull/5420
• Upgrade error for invalid deferDestruction queue state. by @mar-cf in https://github.com/cloudflare/workerd/pull/5421
• Add snake case signatures for workflow binding methods by @Caio-Nogueira in https://github.com/cloudflare/workerd/pull/5398
• Fill in some more JsValue implmentation bits by @jasnell in https://github.com/cloudflare/workerd/pull/5424

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251027.0...v1.20251029.0

What's Changed

• Update dependencies by @workers-devprod in https://github.com/cloudflare/workerd/pull/5412
• [nfc] clang-tidy by @mikea in https://github.com/cloudflare/workerd/pull/5108
• Remove querysync from .bazelproject by @anonrig in https://github.com/cloudflare/workerd/pull/5414

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251025.0...v1.20251027.0

What's Changed

• Shave a few bytes off Event/EventTarget by @jasnell in https://github.com/cloudflare/workerd/pull/5404
• Use a shared Fetcher instance for ServiceWorkerGlobalScope requests by @jasnell in https://github.com/cloudflare/workerd/pull/5405
• Reland tracing infrastructure for bindings with fix. by @mar-cf in https://github.com/cloudflare/workerd/pull/5395
• Remove additional header checks by @jasnell in https://github.com/cloudflare/workerd/pull/5406
• [jsg] assert active deferred queue state by @mikea in https://github.com/cloudflare/workerd/pull/5409
• feat: ability to run formatters using rules_lint by @alexeagle in https://github.com/cloudflare/workerd/pull/5235
• spring cleaning for modules/deps by @anonrig in https://github.com/cloudflare/workerd/pull/5410
• update node.js streams implementation by @anonrig in https://github.com/cloudflare/workerd/pull/5298

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251024.0...v1.20251025.0

What's Changed

• EW-9632 Increase max WebSocket message size limit to 32MiB by @harrishancock in https://github.com/cloudflare/workerd/pull/5362
• Lower bench-text-encoder iterations to more reasonable numbers by @jasnell in https://github.com/cloudflare/workerd/pull/5397
• Avoid creating unnecessary ReadableStream on every request by @jasnell in https://github.com/cloudflare/workerd/pull/5402
• Inline multiple JsValue APIs by @jasnell in https://github.com/cloudflare/workerd/pull/5400
• Add entropysource to newInternalHttpClient so websockets work, and fi… by @tewaro in https://github.com/cloudflare/workerd/pull/5403

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251023.0...v1.20251024.0

What's Changed

• separate streams implementations for maintenance by @anonrig in https://github.com/cloudflare/workerd/pull/5364
• Implements shapely vendored test for Python Workers by @dom96 in https://github.com/cloudflare/workerd/pull/5365
• [Instrumentation] Add spans for Images Binding by @jmorrell-cloudflare in https://github.com/cloudflare/workerd/pull/5236
• [Instrumentation] Add D1 spans by @jmorrell-cloudflare in https://github.com/cloudflare/workerd/pull/5218
• Add reranking controls to AutoRAG binding search methods by @Naapperas in https://github.com/cloudflare/workerd/pull/5295
• use jsg::Lock methods more by @anonrig in https://github.com/cloudflare/workerd/pull/5368
• improve text-encoder benchmark by @anonrig in https://github.com/cloudflare/workerd/pull/5374
• Perf improvements for TextEncoder::encodeInto by @jasnell in https://github.com/cloudflare/workerd/pull/5372
• containers: move out of experimental the setInactivityTimout method by @gabivlj in https://github.com/cloudflare/workerd/pull/5353
• revert recent changes by @mikea in https://github.com/cloudflare/workerd/pull/5376
• add benchmarks for Response by @anonrig in https://github.com/cloudflare/workerd/pull/5369

New Contributors

• @Naapperas made their first contribution in https://github.com/cloudflare/workerd/pull/5295

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251022.0...v1.20251023.0

What's Changed

• Normalise path before passing to loadDynlib in Python Workers. by @dom96 in https://github.com/cloudflare/workerd/pull/5348
• VS-461: Fix Vectorize Metadata filter type definitions by @nagraham in https://github.com/cloudflare/workerd/pull/5307
• Remove backpressure debug warning by @jasnell in https://github.com/cloudflare/workerd/pull/5356
• speedup clion bazel experience by @anonrig in https://github.com/cloudflare/workerd/pull/5347
• WO-750 Add tracing infrastructure for bindings by @m-makuch in https://github.com/cloudflare/workerd/pull/5094
• Python: Fail loading dynamic library if table base doesn't match by @hoodmane in https://github.com/cloudflare/workerd/pull/5349
• Refactor SqliteKv’s multi-put to silence an errant clang-tidy lint by @justin-mp in https://github.com/cloudflare/workerd/pull/5363
• chore(deps): move ada-url and brotli to bzlmod by @alexeagle in https://github.com/cloudflare/workerd/pull/5355
• Python: Temporarily disable scipy-vendor-test by @hoodmane in https://github.com/cloudflare/workerd/pull/5371
• containers: Keep doing exclusive join just in case the service request does not exit by @gabivlj in https://github.com/cloudflare/workerd/pull/5367
• Python: In 0.28.2 tests, use stacked snapshot by default by @hoodmane in https://github.com/cloudflare/workerd/pull/5350
• Rename PythonRuntimeError to PythonInternalError by @hoodmane in https://github.com/cloudflare/workerd/pull/5351
• Add cache: reload as experimental by @tewaro in https://github.com/cloudflare/workerd/pull/4875

New Contributors

• @nagraham made their first contribution in https://github.com/cloudflare/workerd/pull/5307

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251021.0...v1.20251022.0

What's Changed

• Implement SmallSet to optimize ReadableStream tee handling by @jasnell in https://github.com/cloudflare/workerd/pull/5337
• Update dependencies by @workers-devprod in https://github.com/cloudflare/workerd/pull/5338
• Python: Refactor preloadDynamicLibs to improve readability by @hoodmane in https://github.com/cloudflare/workerd/pull/5340
• Implement JSG_STRUCT DictionaryTemplates by @jasnell in https://github.com/cloudflare/workerd/pull/5339
• [build] Update lol-html, bzlmod deps by @fhanau in https://github.com/cloudflare/workerd/pull/5354
• [rust] use 1.90.0 by @mikea in https://github.com/cloudflare/workerd/pull/5276
• [nfc] update rust deps by @mikea in https://github.com/cloudflare/workerd/pull/5358

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251020.0...v1.20251021.0

What's Changed

• EW-9332 Update V8 14.1 -> 14.2 by @harrishancock in https://github.com/cloudflare/workerd/pull/5333
• 10-08-25 build maintenance by @fhanau in https://github.com/cloudflare/workerd/pull/5272
• add minimumReleaseAge to pnpm by @anonrig in https://github.com/cloudflare/workerd/pull/5336
• fix warnings caused by codspeed by @anonrig in https://github.com/cloudflare/workerd/pull/5344
• [build] Reduce CI remote cache fetch parallelism to debug CI freezes by @fhanau in https://github.com/cloudflare/workerd/pull/5345

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251019.0...v1.20251020.0

What's Changed

• Python snapshots: Fix path confusion when preloading dynamic libraries by @hoodmane in https://github.com/cloudflare/workerd/pull/5335
• Python: Update create_vendor_zip.py to support multiple packages by @hoodmane in https://github.com/cloudflare/workerd/pull/5326

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251018.0...v1.20251019.0

What's Changed

• fix several todos related to typescript by @anonrig in https://github.com/cloudflare/workerd/pull/5331
• Python snapshots: Record table base in metadata by @hoodmane in https://github.com/cloudflare/workerd/pull/5334
• Python: Update vendor_test.bzl to handle python_flags arguments by @hoodmane in https://github.com/cloudflare/workerd/pull/5328
• update typescript to 5.9.2 by @anonrig in https://github.com/cloudflare/workerd/pull/5313

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251017.0...v1.20251018.0

What's Changed

• add text encoder benchmarks by @anonrig in https://github.com/cloudflare/workerd/pull/5323
• update codspeed to v1.3.0 by @anonrig in https://github.com/cloudflare/workerd/pull/5324
• improve text-encoder benchmark by @anonrig in https://github.com/cloudflare/workerd/pull/5327
• fix node http client search attributes by @anonrig in https://github.com/cloudflare/workerd/pull/5329
• jsg: assert against adding to the destruction queue after v8 isolate is destroyed by @jclee in https://github.com/cloudflare/workerd/pull/5330

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251016.0...v1.20251017.0