npm · #1828 most downloaded on npm

@cloudflare/workerd-linux-64

1.20261004.1cloudflare/workerd ↗New releases in your daily digest, changelog included.

👷 workerd for Linux 64-bit, Cloudflare's JavaScript/Wasm Runtime

Last release today
04 Oct 2026
Ships on a steady schedule
a new release about every 8 days
Nearly every release is documented
notes for 59 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
4 years old
565 releases · first in 2022

Release timeline

565 releases since 2022

20222023202420252026

20222026

One column per quarter.

Releases

1.20261004.14 Oct 2026
Nothing published for this version
1.20261003.13 Oct 2026
STOR-5615: Cover more JSRPC retry paths in unit tests by @apeacock1991 in #7594
What's Changed

STOR-5615: Cover more JSRPC retry paths in unit tests by @apeacock1991 in #7594

JSG: Wrap non-coercible values by @jp4a50 in #7602

Add ctx.cache.invalidate() by @zaidoon1 in #7562

Full Changelog: v1.20261002.1...v1.20261003.1
Open source →

From the same repository

cloudflare/workerd

@cloudflare/workers-typesnpmTypeScript typings for Cloudflare Workers

What's Changed

Prepare TLS changes by @fhanau in #7582
Workflows create batch overload by @Naapperas in #7272
Restore the C++ exception boundary in console.* decorators by @dbezhetskov in #7587
Accept an explicit onset parent span by @mar-cf in #7559
Fix reportQueryEvent fails to cover prepare statements by @frostzt in #7585
internal build for #7585 by @git-bruh in #7593
remove v8 nightly by @csjh in #7512

New Contributors

@frostzt made their first contribution in #7585

Full Changelog: v1.20261001.1...v1.20261002.1

Open source →

1.20260930.230 Sept 2026

Revert: Update compat date for durable_object_io_tasks_prevent_eviction by @rinkle-cf in #7580

What's Changed

Revert: Update compat date for durable_object_io_tasks_prevent_eviction by @rinkle-cf in #7580
Fix spurious unhandled rejections from Durable Object fetch retries by @petebacondarwin in #7584

Full Changelog: v1.20260930.1...v1.20260930.2

Open source →

1.20260930.130 Sept 2026

STOR-5615: Add the @retryable Durable Object decorator by @apeacock1991 in #7521

What's Changed

STOR-5615: Add the @retryable Durable Object decorator by @apeacock1991 in #7521
Enable debug for v8's heap.cc by @dbezhetskov in #7388
[build] Update to V8 15.5.35.7 by @harrishancock in #7568
[nfc] Clarify V8 compatibility audit requirements by @harrishancock in #7571
Add Artifacts repository read types by @leostera in #7519
Centralize TraceContext construction by @mar-cf in #7564
Update compat date for durable_object_io_tasks_prevent_eviction by @rinkle-cf in #7577

New Contributors

@leostera made their first contribution in #7519

Full Changelog: v1.20260929.1...v1.20260930.1

Open source →

1.20260929.129 Sept 2026

Defer in-memory alarm task cancellation by @danlapid in #7555

What's Changed

Defer in-memory alarm task cancellation by @danlapid in #7555
Upstream internal patches (2026-09-27) by @danlapid in #7554
STOR-5615: Count full replay memory for JSRPC calls by @apeacock1991 in #7558
Remove a ton of rolled out autogates by @danlapid in #7556
Run Bonk from ask-bonk main by @danlapid in #7561
Refactor console method decoration for snapshotting by @dbezhetskov in #6874
Add ML-KEM and ML-DSA WebCrypto support by @thibmeu in #6872
Update dependencies by @workers-devprod in #7565
Set compat date for flag preventing eviction of DO with active I/O tasks. by @rinkle-cf in #7563

New Contributors

@dbezhetskov made their first contribution in #6874
@thibmeu made their first contribution in #6872

Full Changelog: v1.20260928.1...v1.20260929.1

Open source →

1.20260927.127 Sept 2026

kj-rs: drop a KjOwn through kj::Own's own destructor by @danlapid in #7491

What's Changed

kj-rs: drop a KjOwn through kj::Own's own destructor by @danlapid in #7491
Make Bonk reviews reliable and context-aware by @danlapid in #7551
Make Bonk reviews precise by @danlapid in #7552

Full Changelog: v1.20260926.1...v1.20260927.1

Open source →

1.20260926.126 Sept 2026

fix: handle exceptions thrown in TCP connect() handler by @ThomasRubini in #7518

What's Changed

fix: handle exceptions thrown in TCP connect() handler by @ThomasRubini in #7518
update capnp-cpp and use kj::StaticArrayPtr for static tables by @mikea in #7522
Settle a TransformStream cancel from the writable's state by @jasnell in #7509
STOR-5615: Apply retry policy to JSRPC calls by @apeacock1991 in #7513
Add jsg support for shared-ownership module sources by @mikea in #7523
Linting: reject more use-after-moves by @jtolio in #7451
Release the transformer once a TransformStream finishes by @jasnell in #7510
[Workers AI] Update model reasoning types by @KastanDay in #7437
ts streams identity write settlement by @jasnell in #7515
Read detached and out-of-bounds DataView chunks as empty by @jasnell in #7516

New Contributors

@KastanDay made their first contribution in #7437

Full Changelog: v1.20260925.2...v1.20260926.1

Open source →

1.20260925.225 Sept 2026

Close a native stream at the handoff of its data by @jasnell in #7502

What's Changed

Close a native stream at the handoff of its data by @jasnell in #7502
Lock a closed or errored native stream on tee() by @jasnell in #7504
Validate a writable chunk's size only when it is enqueued by @jasnell in #7507
STOR-5615: Add configurable Durable Object retries by @apeacock1991 in #7383
Add runtime support for running same-worker Workflows by @Naapperas in #7361
Adopt kj::StickyFlag to simplify basic promise and fulfiller use. by @jtolio in #7404
Sqlite: support adding specific error context to internal exceptions by @jtolio in #7514

Full Changelog: v1.20260925.1...v1.20260925.2

Open source →

1.20260925.125 Sept 2026

Make workerd's entry point Rust by @danlapid in #7457

What's Changed

Make workerd's entry point Rust by @danlapid in #7457
Document and pin slowest-branch tee backpressure by @jasnell in #7476
bump reviewer to opus 5.5 by @danlapid in #7496
Take queued bytes whole on auto-allocate default reads by @jasnell in #7477
Increase the SQLite row limit to 8 MiB by @joshthoward in #7493
Keep a byobRequest held across tee() working by @jasnell in #7478
Queue the chunk before filling reads with released bytes by @jasnell in #7479
Add actor wait-until task lifetime tracking hook by @rinkle-cf in #7301
add some deserialization diagnostics by @dcarney-cf in #7486
Only run internal build for necessary paths by @ketanhwr in #7463
STOR-5489: Retry Durable Object RPC calls by @apeacock1991 in #7430
[build] Increase link parallelism again by @fhanau in #7495
[build] Update boringssl by @fhanau in #7179
Pin that a pipe waits for an erroring destination's in-flight write by @jasnell in #7501
Observe the pipe's AbortSignal through an abort algorithm by @jasnell in #7500
Claim DO retry tokens after actor construction by @apeacock1991 in #7497
[WO-1581] Enable span status and renaming by @jmorrell-cloudflare in #7348
Release the pipe source when validation fails after locking by @jasnell in #7498

New Contributors

@rinkle-cf made their first contribution in #7301

Full Changelog: v1.20260924.1...v1.20260925.1

Open source →

1.20260924.124 Sept 2026

Allow tee() of a native body with an abandoned read in flight by @jasnell in #7471

What's Changed

Allow tee() of a native body with an abandoned read in flight by @jasnell in #7471
Pull local system images before create by @ghostwriternr in #7461
Use fresh isolate groups when available. by @erikcorry in #7445
Preserve VFS exceptions during SQLite open by @jtolio in #7151
Introduce env.AI.websearch to WorkerD by @Phanatic in #7450
fix: avoid initializing the UDP connect tracer twice by @ThomasRubini in #7487
[tsan] increase tsan history by @mikea in #7481
Accept a null source in MessageEventInit by @danielmlr in #7470
Internal build for #7470 by @tpmmorris in #7489
[o11y] Add undefined to tailStream return types by @fhanau in #7436
STOR-5489: Account for RPC serializer capacity by @apeacock1991 in #7484
capnproto update by @mikea in #7472
Use weak self captures for refcounted continuations by @jtolio in #7434
Forward REST caller context to downstream AI Gateway by @Phanatic in #7492
Error a tee branch or detached byte stream on a fractional fill at close by @jasnell in #7473
Skip building an unobservable XThreadWaitList rejection by @danlapid in #7494
Transfer byte-stream buffers to fixed length by @jasnell in #7474
Pin async iterator interleavings that follow WebIDL by @jasnell in #7475

New Contributors

@Phanatic made their first contribution in #7450
@danielmlr made their first contribution in #7470
@tpmmorris made their first contribution in #7489

Full Changelog: v1.20260923.1...v1.20260924.1

Open source →

1.20260923.123 Sept 2026

[ci] Fix automated deps update by @fhanau in #7456

What's Changed

[ci] Fix automated deps update by @fhanau in #7456
[STOR-5489] Observe Durable Object RPC call attempts by @apeacock1991 in #7346
r2-rpc.c++: Copy put bodies out of the sandbox for MPK by @erikcorry in #7444
STOR-5489: Measure Durable Object RPC replay memory by @apeacock1991 in #7408
Update dependencies by @workers-devprod in #7458
Make skill reference links portable by @harrishancock in #7303
Implement proper js rpc stream cancel propagation by @jasnell in #7298
Walk the queued stream's cursors by index and skip the pinned cursor by @jasnell in #7426
[build] Apply formatters to custom clang-tidy checks by @fhanau in #7454
Linting: improve coroutine-hostile-raii test to check declaration nodes too by @jtolio in #7431
Settle the head read first when respond() leaves a remainder by @jasnell in #7465
Pin where closed settles relative to the below-min tail read by @jasnell in #7467
Return an empty view from read(view) on a cancelled byte stream by @jasnell in #7468
Deliver whole elements from native BYOB reads with multi-byte views by @jasnell in #7469

Full Changelog: v1.20260922.1...v1.20260923.1

Open source →

1.20260922.122 Sept 2026

Add a bazel option to disable remote python snapshot when testing by @ryanking13 in #7429

What's Changed

Add a bazel option to disable remote python snapshot when testing by @ryanking13 in #7429
[STOR-5489] Claim Durable Object RPC calls before dispatch by @apeacock1991 in #7347
Deflake connect-handler tests by @erikcorry in #7446
Use 2 isolates for tests to exercise cross-isolate by @erikcorry in #7447
implement RPC support for inbound UDP connect() event by @ThomasRubini in #7433
Support V8 15.5 API and test changes by @harrishancock in #7416
[build] Update to LLVM 22 by @fhanau in #7435
Copy body bytes out as they arrive and cancel the source when consump… by @jasnell in #7424
Make snapshotContainer options optional by @gpanders in #7453
build: instrument Rust under --config=asan by @danlapid in #7443
build: let Rust crates live beside the C++ they belong to by @danlapid in #7448
Remove the C++ I/O backend (--//:io_backend=cxx) by @danlapid in #7449
Buffer the compression stage's output in blocks released as they are … by @jasnell in #7425

Full Changelog: v1.20260921.1...v1.20260922.1

Open source →

1.20260920.120 Sept 2026

Error both halves of a transform pair from the Node.js interop hook by @jasnell in #7417

What's Changed

Error both halves of a transform pair from the Node.js interop hook by @jasnell in #7417
Drop what a queued stream enqueues once every consumer is collected by @jasnell in #7421

Full Changelog: v1.20260919.1...v1.20260920.1

Open source →

1.20260919.119 Sept 2026

Transform a parked TransformStream write after one backpressure wait by @jasnell in #7412

What's Changed

Transform a parked TransformStream write after one backpressure wait by @jasnell in #7412
Python: Hot fix for stack switching gc crash (upstream pyodide#6466) by @hoodmane in #7422
Add Analytics SQL binding types by @Ankcorn in #7396
Split actor retry exhaustion outcomes and increase backoff by @apeacock1991 in #7414
Document coroutine cleanup patterns by @jtolio in #7403
[nfc] Fix compiler warnings based on KJ_HEADER_WARNINGS by @fhanau in #7419

Full Changelog: v1.20260918.1...v1.20260919.1

Open source →

1.20260918.118 Sept 2026

Keep native pipes from consuming a destination with pending writes by @jasnell in #7395

What's Changed

Keep native pipes from consuming a destination with pending writes by @jasnell in #7395
Stop identity stream aborts from waiting for a read by @jasnell in #7399
Wire the Rust I/O backend into workerd: --//:io_backend, on by default by @danlapid in #7328
Fix container startup flags after cancellation by @jtolio in #7402
Add a ring buffer for the streams' internal queues by @jasnell in #7405
Clean up containers on graceful shutdown by @ghostwriternr in #7244
Move retry claim before actor construction by @apeacock1991 in #7230
Add just format <files>, just format-head by @sohpeach in #7407
Abstract CrossThreadWaitList into SyncWaitList and introduce XThreadWaitList by @ObsidianMinor in #7397
update capnproto by @mikea in #7400
Improve TS stream primordial safety by @jasnell in #7409
fix compile_flags.txt by @mikea in #7415
Updates v8 to 15.4 by @dom96 in #7386
update capnproto by @mikea in #7420
Implement inbound UDP handler by @ThomasRubini in #7130
Add coroutine-hostile-raii lint for UnwindDetector, and add fixes by @jtolio in #7153

Full Changelog: v1.20260917.1...v1.20260918.1

Open source →

1.20260917.117 Sept 2026

kj-rs-tokio: timer test allows for the loop's cached time by @danlapid in #7380

What's Changed

kj-rs-tokio: timer test allows for the loop's cached time by @danlapid in #7380
Update WPT to wpt-b875b21fd by @guybedford in #7381
Expose hibernatable WebSocket count by @jqmmes in #7371
.bazelrc: add native_arm64 no-op by @git-bruh in #7384
Restrict GCs at inopportune moments. by @erikcorry in #7387
container client: Add support for cloudflare/debian-trixie by @gabivlj in #7374
feat(types): add Browser Run binding methods by @niklhut in #7273
node:fs: open without O_CREAT is ENOENT for a missing path by @guybedford in #7393
node:fs: rename and copyFile replace an existing destination by @guybedford in #7394
Handful of TS streams byob and tee fixes by @jasnell in #7389
make actor maps own their keys by @mikea in #7398
Fix handling of pipe draining backpressure by @jasnell in #7391

Full Changelog: v1.20260916.1...v1.20260917.1

Open source →

1.20260916.116 Sept 2026

Add node:stream web-interop suite by @jasnell in #7336

What's Changed

Add node:stream web-interop suite by @jasnell in #7336
Update dependencies by @workers-devprod in #7363
fix(server): facet channel UaF after alarm timeout by @git-bruh in #7370
Disable retries for ineligible actor namespaces by @apeacock1991 in #7353
Report whether an actor fetch target supports retries by @apeacock1991 in #7345
Bump next from 16.2.12 to 16.3.3 by @dependabot[bot] in #7292
Support web streams in stream.pipeline() by @jasnell in #7338
CC-8364 Allow containers without imageName by @ghostwriternr in #7307
Expand js-rpc streams test coverage by @jasnell in #7295
[STOR-5621] Prepare JS RPC call plans for retries by @apeacock1991 in #7323
node:fs: fix offset/length bounds validation for buffer read/write by @guybedford in #7368
Add node:net suite by @jasnell in #7339
Add scheduling time to alarm storage spans by @Ankcorn in #7359
node:http server test suite by @jasnell in #7340
node:fs: honour O_TRUNC in open by @guybedford in #7369
Fix kj-rs waker result race during joined readiness by @harrishancock in #7372
Python: More minor improvements to patch_pyodide_asm by @hoodmane in #7376
Add clang-tidy check for stream creation by @jasnell in #7308
Add node:http client suite by @jasnell in #7341
thread-safe LOG_PERIODICALLY by @mikea in #7327
kj-rs: arm the poll event directly on a same-thread stored-waker wake by @danlapid in #7349
Fix ScriptCompiler usage by @csjh in #7364
build: finish narrowing kj-async deps to the layer each target uses by @danlapid in #7379
kj-rs-io: KJ async I/O interfaces backed by tokio by @danlapid in #7013
[JSG] replace some recursive templates with auto deduce this by @fhanau in #7365
More node:streams tests and fixes by @jasnell in #7342
update capnp by @mikea in #7377
Support web streams in stream.compose() by @jasnell in #7343
Destroy Readable.fromWeb on a chunk it cannot push by @jasnell in #7344

New Contributors

@ghostwriternr made their first contribution in #7307
@csjh made their first contribution in #7364

Full Changelog: v1.20260915.1...v1.20260916.1

Open source →

1.20260915.115 Sept 2026

build: depend on the kj-async layer each target actually uses by @danlapid in #7350

What's Changed

build: depend on the kj-async layer each target actually uses by @danlapid in #7350
Python workers: Replace string Pyodide patches with ast patches by @hoodmane in #7325
disable profiler tests under tsan by @mikea in #7355
feat: expose client IP and port as remoteAddress in TCP connect() handler by @ThomasRubini in #7304
Update Cargo.toml dependencies and export Cargo.toml in BUILD.bazel by @danlapid in #7356
node: make the isolate the port namespace for http and net servers by @guybedford in #7357
Pin error() during a pending close in the readable stream suites by @jasnell in #7335
[build] JSG: move TypeWrapper members that ignore the type list to a base by @fhanau in #7269
Fix memory snapshots with Python 3.14 by @hoodmane in #7311
chore: Tidy up Pyodide patches by @hoodmane in #7367

New Contributors

@ThomasRubini made their first contribution in #7304

Full Changelog: v1.20260914.1...v1.20260915.1

Open source →

1.20260911.111 Sept 2026

Build cleanups by @danlapid in #7300

What's Changed

Build cleanups by @danlapid in #7300
Improve error message when top-level randomness is used in Python workers by @ryanking13 in #7283
Refactor Durable Object Retries to be fetch-agnostic by @apeacock1991 in #7266
fix identity transform stream resolve/state change order by @mikea in #7297
node:net: add net.BoundSocket by @guybedford in #7299
Python: Patch workers.wait_until as well as ctx.waitUntil by @hoodmane in #7293

Full Changelog: v1.20260910.1...v1.20260911.1

Open source →

1.20260910.110 Sept 2026

Move Existing SQLite Sentry routing to exception details by @jtolio in #7246

What's Changed

Move Existing SQLite Sentry routing to exception details by @jtolio in #7246
Update capnp-cpp to v2 head (Executor::isCurrent + setRunnable ordering) by @danlapid in #7281
Upstream patches by @ketanhwr in #7285
Additional streams test consolidation gaps by @jasnell in #7182
Expose compatibility-date.capnp and add AGENTS.md guidance for new APIs by @harrishancock in #7274
Remove experimental tag from auto_grpc_convert by @mar-cf in #7284
fix(web-socket): only log internal errors in abort task by @git-bruh in #7287
cleanup: migrating cxx to wd_ rules by @mikea in #7289
[tsan] fix rust std/tsan compatibility by @mikea in #7280
[tsan] run all tests under tsan by @mikea in #7294
Address multiple TS-streams defects / clarifications by @jasnell in #7183

Full Changelog: v1.20260909.1...v1.20260910.1

Open source →

1.20260908.18 Sept 2026

Fix internal build for forks of org members by @ketanhwr in #7243

What's Changed

Fix internal build for forks of org members by @ketanhwr in #7243
[build] JSG: key struct field wrappers on the field type, not on the field by @fhanau in #7248
[build] JSG: store struct field wrappers in a flat array by @fhanau in #7249

Full Changelog: v1.20260907.1...v1.20260908.1

Open source →

1.20260905.15 Sept 2026

tsan: support macOS arm64 hosts alongside Linux x86_64 by @danlapid in #7238

What's Changed

tsan: support macOS arm64 hosts alongside Linux x86_64 by @danlapid in #7238
Preserve predecessor rejection delivery state by @apeacock1991 in #7220
Instrument LOG_EXCEPTION to observe a new Sentry disposition exception detail by @jtolio in #7185
tsan ci build by @mikea in #7252
Tag SQLite errors with SENTRY_DO by @jtolio in #7150
Revert "Move wrapper handle to shim" by @erikcorry in #7241
WO-1582 Add tracing getActiveSpan by @jmorrell-cloudflare in #7111
Add cache, htmlrewriter, and formdata streams suites by @jasnell in #7178
Store references for internal and user span parents on call argument … by @Caio-Nogueira in #7127
CC-8364 Expose configured container images to Durable Objects by @skepticfx in #7194
Enable perfetto in workerd v8 build by @jasnell in #7223

New Contributors

@skepticfx made their first contribution in #7194

Full Changelog: v1.20260904.1...v1.20260905.1

Open source →

1.20260904.14 Sept 2026

workflows: add experimental subscribe support by @mkuritsu in #7087

What's Changed

workflows: add experimental subscribe support by @mkuritsu in #7087
Mark jsg::{Async}Generator visitable by @jasnell in #7213
Fix memory-cache/lib.rs to use try_update instead of fetch_update. by @dom96 in #7211
Update capnp-cpp to pick up Executor::isCurrent() by @danlapid in #7234
Next large chunk of streams consolidation tests and fixes by @jasnell in #7176
Make cppgc sweeping synchronous by @erikcorry in #7231
Fix validator internal error when getters throw by @taylorlee in #7224
Internal build for !7224 by @ketanhwr in #7233
[build] Disable unsupported tests under RBE, improve hermeticity by @fhanau in #7232
STOR-5489: Observe Durable Object fetch retry activity by @apeacock1991 in #7235
More streams test consolidation and gap filling by @jasnell in #7177
Revert "Merge pull request #7231 from cloudflare/erikcorry/cppgc-eager-sweeping" by @ObsidianMinor in #7237
tsan c++ and rust configurations by @mikea in #7214
Revert WebAssembly memory.discard support by @guybedford in #7221

New Contributors

@mkuritsu made their first contribution in #7087

Full Changelog: v1.20260903.1...v1.20260904.1

Open source →

1.20260903.13 Sept 2026

Switch pythonWorkers314 from compatEnableDate to impliedByAfterDate by @hoodmane in #7216

What's Changed

Switch pythonWorkers314 from compatEnableDate to impliedByAfterDate by @hoodmane in #7216
STOR:5489: Retry replica actor fetches by @apeacock1991 in #7100
STOR-5489: Count retried actor fetches once by @apeacock1991 in #7146
Upstream four patches by @erikcorry in #7217
Call authorizer in default column expressions by @joshthoward in #7192
tests lifetime fixes by @mikea in #7222
WO-1582 Refactor tracing span implementations by @jmorrell-cloudflare in #7093
WO-1582 Add span.recordException by @jmorrell-cloudflare in #7081

Full Changelog: v1.20260902.1...v1.20260903.1

Open source →

1.20260902.12 Sept 2026

Automatically inject python_workers flags for python entrypoints by @ryanking13 in #7114

What's Changed

Automatically inject python_workers flags for python entrypoints by @ryanking13 in #7114
Implement tryReadSync/tryWriteSync support by @jasnell in #7036
Python: Development flag should always win over other Python flags by @hoodmane in #7197
STOR-5552: Serialize WebSocket writes across hibernation by @apeacock1991 in #7147
STOR-5489: Implement retry loop for actor fetch requests by @apeacock1991 in #7064
Remove experimental flag from container.inspect() by @gpanders in #7193
STOR-5489: Propagate actor retry gate state by @apeacock1991 in #7099
update capnp by @mikea in #7199
Put snapshotDirectory API behind experimental flag by @gpanders in #7123
Ensure hibernated websockets handle code updates gracefully by @jqmmes in #6948
Own legacy hibernation tag map keys by @mikea in #7208
Materialize borrowed values before invalidating storage by @mikea in #7206
Order owned storage before non-owning views by @mikea in #7205
Own actor cache keys queued for erasure by @mikea in #7207
switch SpanObserver to kj::Rc by @mikea in #7203
Keep TLS option storage alive with its context by @mikea in #7209
Update WPT by @workers-devprod in #7210
Add digest streams suite; migrate existing DigestStream tests by @jasnell in #7170
Add queuing strategies suite; migrate strategy tests by @jasnell in #7175
Fix dynamic library loading into base snapshot for Pyodide 3.14.x by @hoodmane in #7200

Full Changelog: v1.20260901.1...v1.20260902.1

Open source →

1.20260901.11 Sept 2026

Catch leaked SQLite handles during init failure by @jtolio in #7184

What's Changed

Catch leaked SQLite handles during init failure by @jtolio in #7184
[build] Add support for cfi-icall coverage by @fhanau in #7172
Update dependencies by @workers-devprod in #7196
Implement FileSystemWritableFileStream in TypeScript by @jasnell in #7125
Add encoding streams suite; migrate existing TES/TDS tests by @jasnell in #7154
Add compression streams suite; migrate existing CS/DS tests by @jasnell in #7155

Full Changelog: v1.20260831.1...v1.20260901.1

Open source →

1.20260829.129 Aug 2026

Update deps by @mar-cf in #7159

What's Changed

Update deps by @mar-cf in #7159
Use dynamic_cast to avoid type confusion by @sohpeach in #7160
Fix UaF of in-flight buffers in internal.c++ by @sohpeach in #7161
Retain hibernatable WebSockets during active pumps by @sohpeach in #7163
Use shims to find wrappables by @sohpeach in #7164
fix(streams): Cancel internal stream pumps before releasing their source by @sohpeach in #7165
Fix EventSource use-after-free by @sohpeach in #7166
Implements resource name arg in jsg-test's eval by @dom96 in #7103
SQC-900 create dynamic hyperdrive types by @Ltadrian in #7070
Increase timeouts for slow integration tests by @guybedford in #7171
feat: add kitesurf option to browser run quick action by @meddulla in #7105
Create a WPT triage skill + bump WPT by @npaun in #7173

New Contributors

@Ltadrian made their first contribution in #7070
@meddulla made their first contribution in #7105

Full Changelog: v1.20260828.1...v1.20260829.1

Open source →

1.20260828.128 Aug 2026

IMAGES-2451: Fix negative text input check to allow streamable data by @deven96 in #7079

What's Changed

IMAGES-2451: Fix negative text input check to allow streamable data by @deven96 in #7079
Internal build for !7079 by @ketanhwr in #7117
Implement memory cache V2 in safe Rust by @danlapid in #7110
Add missing Workers AI model types by @kflansburg in #7135
Consolidated IdentityTransformStream/FixedLengthStream Test Suite by @jasnell in #7133

Full Changelog: v1.20260827.1...v1.20260828.1

Open source →

1.20260827.127 Aug 2026

Add zlib-rs as an autogated backend for node:zlib by @guybedford in #7109

What's Changed

Add zlib-rs as an autogated backend for node:zlib by @guybedford in #7109
fix(container-test): refcounted usage by @git-bruh in #7118
Accept span completion after request teardown by @apeacock1991 in #7016
Tag post-delivery exceptions to distinguish runtime failures by @apeacock1991 in #7116
Update Pyodide version to 314.0.6 by @ryanking13 in #7115
trivial tsan fixes by @mikea in #7122
Restrict internal functions to nested parse by @joshthoward in #7128
Fail script creation if TS-streams on with per-isolate autogate off by @jasnell in #7121
Fix off-by-one and macro impls for TypedArray by @LordGoatius in #7107
Route all zlib consumers through an autogated router by @guybedford in #7132
Skip writable abort task if no current request by @jasnell in #7102
capnp-mock.h: Clean up unused local KJ_LOG_AT(), etc. definitions by @jclee in #7134

Full Changelog: v1.20260826.1...v1.20260827.1

Open source →

1.20260826.126 Aug 2026

Fix node:fs cp to handle symlinks when copying into subdirectories by @ryanking13 in #7098

What's Changed

Fix node:fs cp to handle symlinks when copying into subdirectories by @ryanking13 in #7098
Provide agent guidance on JSG_TRY vs. js.tryCatch by @jasnell in #7067
Add ioContext.createObject by @jasnell in #7086
Opencode agent/skill surgery by @jasnell in #7095
08-24-26 Build maintenance by @fhanau in #7104
always copy websocket tags by @mikea in #7088
BRAPI-1553: Add response metadata to Browser Run types by @BernardoPe in #7002
Implement TS DigestStream by @jasnell in #7119

New Contributors

@BernardoPe made their first contribution in #7002

Full Changelog: v1.20260825.1...v1.20260826.1

Open source →

1.20260825.125 Aug 2026

STOR-5552: Preserve in-flight WebSocket auto-responses (with fix) by @apeacock1991 in #7083

What's Changed

STOR-5552: Preserve in-flight WebSocket auto-responses (with fix) by @apeacock1991 in #7083
cleanup and simplify compile-test.sh. by @KirillTim in #7101
use Arc to create dynamic strings from, use it in modules-new by @mikea in #7090
always copy sock address by @mikea in #7089
[build] Prepare workerd for explicit libc++ linkage by @KirillTim in #7025
Retain async context frames across scopes by @guybedford in #7096
TS-backed compression streams and compression context consolidation by @jasnell in #7075
Clean up EventTarget and AbortSignal implementation by @jasnell in #7053

New Contributors

@KirillTim made their first contribution in #7101

Full Changelog: v1.20260824.1...v1.20260825.1

Open source →

1.20260822.122 Aug 2026

Add a new Pyodide version 314.0.5 by @ryanking13 in #7046

What's Changed

Add a new Pyodide version 314.0.5 by @ryanking13 in #7046
Accept WebAssembly.Module values in the dynamic worker loader by @guybedford in #6997
Revert "STOR-5552: Preserve in-flight WebSocket auto-responses" by @apeacock1991 in #7082
Fix wrong error message when trying to use alarms in facets. by @kentonv in #7085
Upgrade SQLite to version 3.53.4 by @joshthoward in #7084
Implement jsrpc serialization/deserialization for TS web streams by @jasnell in #7073

Full Changelog: v1.20260821.1...v1.20260822.1

Open source →

1.20260821.121 Aug 2026

Fix workers-sdk Vitest fixture filter by @apeacock1991 in #7077

What's Changed

Fix workers-sdk Vitest fixture filter by @apeacock1991 in #7077
STOR-5552: Preserve in-flight WebSocket auto-responses by @apeacock1991 in #7065
STOR-5542: Allow ctx.abort() to disable alarm retries by @apeacock1991 in #6996
Keep subject prefixes when applying V8 patches by @harrishancock in #7069
WOR-1491: make workflows_bindings_rpc obsolete by @Caio-Nogueira in #6987
Test and fix for jsg::WeakRef segfault case by @jasnell in #7078
More TS-backed Streams Work by @jasnell in #7071
Temporarily disable the per PR random number generator by @jasnell in #7080
CC-8419: make directory snapshot id optional by @flakey5 in #7039

Full Changelog: v1.20260820.1...v1.20260821.1

Open source →

1.20260820.120 Aug 2026

Increase the SQLite row limit to 4 MiB by @joshthoward in #7020

What's Changed

Increase the SQLite row limit to 4 MiB by @joshthoward in #7020
Fix incorrect error message for workers-py version requirement by @ryanking13 in #7043
Warn instead of failing when a compat flag is already on by date by @petebacondarwin in #6980
WOR-1487: expose workflow instance location hints by @Caio-Nogueira in #6961
IMAGES-2451: Images text rasterization by @deven96 in #6979
Internal build for #6979 by @ketanhwr in #7058
Browser run accessibility tree types by @niklhut in #6928
Add current-process debug port access by @penalosa in #7005
Images binding: metadata filtering, signedUrl, and createDirectUpload by @Monark-Arkmon in #6880
Internal build for #6880 by @ketanhwr in #7056
use kj::String for entrypoint name by @mikea in #7068

New Contributors

@niklhut made their first contribution in #6928

Full Changelog: v1.20260819.1...v1.20260820.1

Open source →

1.20260819.119 Aug 2026

Remove the $experimental annotation on new module registry by @jasnell in #7027

What's Changed

Remove the $experimental annotation on new module registry by @jasnell in #7027
Name the warning level warn in structured logs by @petebacondarwin in #7045
Remove experimental flag for container start image and instance by @gpanders in #6992
make importKeySync static by @mikea in #7040
Images binding: allow setting headers on .response() by @Monark-Arkmon in #6881
Internal build for #6881 by @ketanhwr in #7057
Use validated GPT-5.6 Bonk configuration by @southpolesteve in #7050

New Contributors

@Monark-Arkmon made their first contribution in #6881
@southpolesteve made their first contribution in #7050

Full Changelog: v1.20260818.1...v1.20260819.1

Open source →

1.20260818.118 Aug 2026

chore: bump capnp-es to 0.0.16 by @vicb in #7008

What's Changed

chore: bump capnp-es to 0.0.16 by @vicb in #7008
Fix two GC strong-root leaks: tail event cf cycles and abandoned pipe writes by @guybedford in #7017
Replace a few more raw references with kj::Ptr in standard.c++ by @jasnell in #6949
Replace raw ReadableStream& ref with jsg::WeakRef by @jasnell in #6936
Correct the jsg-visit-for-gc check's type lists and document its model by @guybedford in #7015
Add wasm_memory_discard compatibility flag by @guybedford in #6999
Update dependencies by @workers-devprod in #7030
Add ci report opencode skill by @jasnell in #7023
Update WPT by @workers-devprod in #7021
Remove experimental streams adapters by @jasnell in #7028
Fix incorrect comments misnaming jsgrs jsg::Rc by @LordGoatius in #6994
properly allocate refcounted objects by @mikea in #7038
More JsReadableStream/JsWritableStream work by @jasnell in #7029
Add helper macros to Rust by @logan-gatlin in #7014

Full Changelog: v1.20260817.1...v1.20260818.1

Open source →

1.20260815.115 Aug 2026

Add NMR fallback lookup for the fallback resolution by @jasnell in #6965

What's Changed

Add NMR fallback lookup for the fallback resolution by @jasnell in #6965
Add SpanContext::toTraceparent() by @mar-cf in #6942
Revamp jsg::Nullable in jsg-rs by @LordGoatius in #6935
emit per-call jsRpcCall spans and propagate stub origin for trace continuity by @apeacock1991 in #7006
[build] Assign more CPUs for link actions by @fhanau in #7007
Revert "emit per-call jsRpcCall spans and propagate stub origin for trace continuity" by @apeacock1991 in #7018

New Contributors

@LordGoatius made their first contribution in #6935

Full Changelog: v1.20260814.1...v1.20260815.1

Open source →

1.20260814.114 Aug 2026

Bypass rpc flag on wrapped binding deserialization path by @Caio-Nogueira in #6983

What's Changed

Bypass rpc flag on wrapped binding deserialization path by @Caio-Nogueira in #6983
Fix error messages on types to avoid Js* names by @erikcorry in #6946
capnp update by @mikea in #6989
Only require snapshot ID in snapshot restore by @gpanders in #6988
Rust cleanups: panic-restriction lints, panic hygiene, drop unused gl… by @danlapid in #6990
STOR-5489: Generate retry metadata at actor fetch call sites by @apeacock1991 in #6981

Full Changelog: v1.20260813.1...v1.20260814.1

Open source →

1.20260813.113 Aug 2026

Fix segfault in JSG unwrap functions by @logan-gatlin in https://github.com/cloudflare/workerd/pull/6971

What's Changed

Fix segfault in JSG unwrap functions by @logan-gatlin in https://github.com/cloudflare/workerd/pull/6971
Build macOS host tools against macOS 13.5 rather than 10.11 by @petebacondarwin in https://github.com/cloudflare/workerd/pull/6982
containers: Always run monitor in the background after container.start() by @gabivlj in https://github.com/cloudflare/workerd/pull/6977
in-tree workerd-cxx as src/rust/cxx by @mikea in https://github.com/cloudflare/workerd/pull/6975
Remove unused TLS and RPC includes in api by @danlapid in https://github.com/cloudflare/workerd/pull/6985

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260812.1...v1.20260813.1

Open source →

1.20260812.112 Aug 2026

[build] Split pyodide repos from Python deps file by @ryanking13 in https://github.com/cloudflare/workerd/pull/6940

What's Changed

[build] Split pyodide repos from Python deps file by @ryanking13 in https://github.com/cloudflare/workerd/pull/6940
Add regression tests for vuln-88 and harden checkSignal() by @erikcorry in https://github.com/cloudflare/workerd/pull/6951
STOR-5489: Plumb actor retry request metadata through Fetcher by @apeacock1991 in https://github.com/cloudflare/workerd/pull/6958
Copy writable sink adapter data for MPK by @erikcorry in https://github.com/cloudflare/workerd/pull/6969
queue.c++: Copy data out of sandbox for MPK by @erikcorry in https://github.com/cloudflare/workerd/pull/6968
[build] Update ancillary deps by @fhanau in https://github.com/cloudflare/workerd/pull/6960
Copy readable stream data for MPK by @erikcorry in https://github.com/cloudflare/workerd/pull/6970
[build] Update Rust deps by @fhanau in https://github.com/cloudflare/workerd/pull/6973
Add WPT updater workflow by @npaun in https://github.com/cloudflare/workerd/pull/6972
Add HandleScope in logWarning by @erikcorry in https://github.com/cloudflare/workerd/pull/6947
use addFunctor in WorkerLoader, IoContext param injection by @mikea in https://github.com/cloudflare/workerd/pull/6962
fix EventTarget map usage by @mikea in https://github.com/cloudflare/workerd/pull/6974
src: fix container-client textExec test by @flakey5 in https://github.com/cloudflare/workerd/pull/6964

New Contributors

@apeacock1991 made their first contribution in https://github.com/cloudflare/workerd/pull/6958
@flakey5 made their first contribution in https://github.com/cloudflare/workerd/pull/6964

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260811.1...v1.20260812.1

Open source →

1.20260811.111 Aug 2026

Monkeypatch global process to avoid Emscripten's node.js runtime detection by @ryanking13 in https://github.com/cloudflare/workerd/pull/6939

What's Changed

Monkeypatch global process to avoid Emscripten's node.js runtime detection by @ryanking13 in https://github.com/cloudflare/workerd/pull/6939
Freeze perfetto by @npaun in https://github.com/cloudflare/workerd/pull/6945
Use jsg::JsArrayBufferView and remove cached length/offset in byob options by @jasnell in https://github.com/cloudflare/workerd/pull/6932
Freeze perfetto to v56.1 by @npaun in https://github.com/cloudflare/workerd/pull/6953
ci: mandatory - move Bonk to prod account endpoint by @elithrar in https://github.com/cloudflare/workerd/pull/6955
Update WPT and ada-url by @npaun in https://github.com/cloudflare/workerd/pull/6944
Add ActorObserver callback for when DO constructor is complete by @a-robinson in https://github.com/cloudflare/workerd/pull/6952
Implement import.meta.dirname/filename in NMR by @jasnell in https://github.com/cloudflare/workerd/pull/6954
Update dependencies by @workers-devprod in https://github.com/cloudflare/workerd/pull/6956

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260810.1...v1.20260811.1

Open source →

1.20260808.18 Aug 2026

Make ctx.abort() (for stateless workers) non-experimental. by @kentonv in https://github.com/cloudflare/workerd/pull/6930

What's Changed

Make ctx.abort() (for stateless workers) non-experimental. by @kentonv in https://github.com/cloudflare/workerd/pull/6930
Replace raw Writer& with kj::Ptr<Writer> by @jasnell in https://github.com/cloudflare/workerd/pull/6931
Re-land the fix and regression test for vuln-187 by @harrishancock in https://github.com/cloudflare/workerd/pull/6934

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260807.2...v1.20260808.1

Open source →

1.20260807.27 Aug 2026

2026 08 07 upstream by @mikea in https://github.com/cloudflare/workerd/pull/6929

What's Changed

2026 08 07 upstream by @mikea in https://github.com/cloudflare/workerd/pull/6929
attempt to fix release by @mikea in https://github.com/cloudflare/workerd/pull/6933

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260807.1...v1.20260807.2

Open source →