[core] Simplify replay payload preparation by NathanColosimo · Pull Request #3547 · vercel/workflow

NathanColosimo · 2026-08-14T03:54:31Z

Summary

use one portable, asynchronous Web Crypto implementation for AES key import, encryption, and decryption in Node and browsers
reuse VM-independent decrypt/decompress results across fresh workflow VMs while still deserializing a fresh object graph inside each VM
remove the redundant serialization/replay.ts forwarding module; the runtime cache calls the real payload decoder directly
centralize persisted format-prefix and native gzip/zstd envelope handling in @workflow/world instead of maintaining parallel implementations in core, CLI, and world-vercel
pass the browser WASM zstd decoder explicitly through hydration options; the old registration API remains only as a deprecated compatibility fallback
keep existing public codec aliases and legacy non-binary pass-through signatures so this remains a non-breaking patch

The production TypeScript diff is net 55 fewer lines. Most of the added lines are shared codec owners and regression tests replacing duplicated implementations in their consumers.

Why Web Crypto

The native Node AES path added substantial runtime detection, key-handle bookkeeping, and separate error behavior for a measured saving of only about 0.5 ms per 100 encrypted events. That tradeoff is not worthwhile in this PR.

importKey, encrypt, and decrypt remain the low-level implementation boundary. A later native or WASM implementation can replace that layer without changing serialization, replay caching, or callers.

Replay boundary

decodePayload performs host-owned decrypt → decompress work.
ReplayPayloadCache starts that work once per binary event and retains the prepared bytes for the invocation.
deserializePreparedReplayPayload hydrates those bytes inside each workflow VM, producing a fresh realm-owned object graph on every replay.

Compression telemetry is recorded when the cache performs preparation. Buffer-backed slices are copied into plain owned Uint8Arrays before retention so pooled backing allocations are not retained accidentally.

Compatibility

persisted envelope and encryption formats are unchanged
AES uses the same Web Crypto contract in every runtime
Node still uses native synchronous gzip/zstd when available; browser observability uses its lazy WASM zstd decoder
isEncrypted() remains the symmetric encr predicate; isEncryptedData() matches both encr and sealed encp envelopes
deprecated codec/replay compatibility exports remain available, but the runtime no longer depends on them
portable stream collection uses ReadableStream.getReader() rather than async iteration, preserving Safari support
the zstd fixture test skips cleanly on supported Node versions that do not expose zstdCompressSync

Stack

[world-vercel] Resume partial replay streams after validated events #3546 — replay stream recovery
[core] Simplify replay payload preparation #3547 — replay payload preparation simplification
[core] Prepare replay payloads as event frames arrive #3548 — streamed replay preparation
[core] Trace fresh workflow replay phases #3523 — replay phase tracing
[core] Prune schema modules from workflow bundles #3550 — prune sandbox dependency graph
[workflow] Load per-source replay bundles #3551 — per-source lazy VM bundles

Validation

@workflow/core: 101 passed files, 1 skipped; 2,209 passed tests, 3 expected failures, 1 skipped
@workflow/world-vercel: 26 passed files, 550 passed tests
@workflow/web-shared: 24 passed files, 203 passed tests
typechecks: core, world-vercel, web-shared, CLI
focused encryption, replay-cache, compression, browser hydration, and serialized-data tests

changeset-bot · 2026-08-14T03:54:36Z

🦋 Changeset detected

Latest commit: 84b7a5a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 20 packages

Name	Type
@workflow/core	Patch
@workflow/cli	Patch
@workflow/web-shared	Patch
@workflow/world	Patch
@workflow/world-vercel	Patch
@workflow/builders	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/vitest	Patch
@workflow/web	Patch
workflow	Patch
@workflow/world-testing	Patch
@workflow/world-local	Patch
@workflow/world-postgres	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/nuxt	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

vercel · 2026-08-14T03:54:48Z

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, v0	Aug 21, 2026 8:55pm
example-nextjs-workflow-webpack	Ready	Preview, v0	Aug 21, 2026 8:55pm
example-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-astro-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-express-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-fastify-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-hono-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-nestjs-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-nitro-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-nuxt-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-python-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-sveltekit-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-tanstack-start-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workbench-vite-workflow	Ready	Preview, v0	Aug 21, 2026 8:55pm
workflow-docs	Ready	Preview, v0	Aug 21, 2026 8:55pm
workflow-swc-playground	Ready	Preview, v0	Aug 21, 2026 8:55pm
workflow-tarballs	Ready	Preview, v0	Aug 21, 2026 8:55pm
workflow-web	Ready	Preview, v0	Aug 21, 2026 8:55pm

github-actions · 2026-08-14T03:54:50Z

🧪 E2E Test Results

❌ Some tests failed

❌ Failed E2E Tests

▲ Vercel Production (230 failed)

astro-node (6 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_41M0K1YKJ50GSGYQY3VYFFCY1E | 🔍 observability
resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_41M0K1Z6HX0GSZA2FN6WY0XWQZ | 🔍 observability
setAttributes fire-and-forget: void setAttributes lands without awaiting

astro-quickjs (7 failed):

webhookWorkflow | wrun_41M0K1ME5Q0GHHA44KMVNSF22E | 🔍 observability
AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

example-node (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

example-quickjs (14 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
AbortController abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal
AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

express-node (11 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

express-quickjs (10 failed):

webhookWorkflow | wrun_41M0K1ME5Q0GHHA44KMVNSF22E | 🔍 observability
hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

fastify-node (8 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

fastify-quickjs (11 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

hono-node (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

hono-quickjs (8 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

nest-node (8 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_41M0K1YKJ50GSGYQY3VYFFCY1E | 🔍 observability
resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_41M0K1Z6HX0GSZA2FN6WY0XWQZ | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes

nest-quickjs (12 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

nextjs-turbopack-node (3 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes

nextjs-turbopack-quickjs (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
setAttributes start: initial attributes are seeded on run creation
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

nextjs-webpack-node (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting

nextjs-webpack-quickjs (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
AbortController abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

nitro-node (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
distributedAbortController - reconnect to existing controller | wrun_41M0K27F0K0GW7P4VKWS20RDGQ | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting

nitro-quickjs (11 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

nuxt-node (11 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

nuxt-quickjs (3 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability

python-node (8 failed):

promiseAllWorkflow | wrun_41M0K1RB9Z0GZ7JBS5YVTDP7D6 | 🔍 observability
sleepingWorkflow | wrun_41M0K1RBCR0GY6TXX9CE8BGDTK | 🔍 observability
parallelSleepWorkflow | wrun_41M0K1RBCN0GSADT59ZP4VE250 | 🔍 observability
nullByteWorkflow | wrun_41M0K1RBA60GNB57SAK5CXPMVE | 🔍 observability
cancelRun - cancelling a running workflow | wrun_41M0K1QFMC0GJN5KKNZGFNEXB5 | 🔍 observability
cancelRun via CLI - cancelling a running workflow | wrun_41M0K1WNSF0GKDDPBJ5TH5P560 | 🔍 observability
sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M0K1WP4B0GN7PATD2QJK2FK3 | 🔍 observability
resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M0K1WP200GHRDNQ0VD3KK2G7 | 🔍 observability

sveltekit-node (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
distributedAbortController - manual abort triggers signal | wrun_41M0K276HM0GH1RZ7KWDF9MXHT | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

sveltekit-quickjs (9 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

tanstack-start-node (5 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events

tanstack-start-quickjs (9 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
AbortController abortFromStepWorkflow: step abort cancels an in-flight sibling step
AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly

vite-node (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K1XXDT0GXFZ0MEAQBXBJ6Q | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting

vite-quickjs (11 failed):

concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K1X0YQ0GNEFQMYVD1K3FQJ | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K1YWP60GJSQ84EK33ZJP98 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K1XK810GV19J0QZSMJTG0K | 🔍 observability
AbortController abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal
AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

🌐 Cross-language Conformance (9 failed)

python (9 failed):

deploymentId: 'latest' is a no-op in non-Vercel worlds | wrun_01M0K20CEFPPN33NJ3Y61XJ7PT
promiseAllWorkflow | wrun_41M0K1RB9Z0GZ7JBS5YVTDP7D6
sleepingWorkflow | wrun_41M0K1RBCR0GY6TXX9CE8BGDTK
parallelSleepWorkflow | wrun_41M0K1RBCN0GSADT59ZP4VE250
nullByteWorkflow | wrun_41M0K1RBA60GNB57SAK5CXPMVE
cancelRun - cancelling a running workflow | wrun_41M0K1QFMC0GJN5KKNZGFNEXB5
cancelRun via CLI - cancelling a running workflow | wrun_41M0K1WNSF0GKDDPBJ5TH5P560
sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M0K1WP4B0GN7PATD2QJK2FK3
resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M0K1WP200GHRDNQ0VD3KK2G7

⚠️ Flaky E2E Tests (passed on retry)

These tests failed at least once and passed on a retry. A recurring entry here is a real race worth investigating.

41 flaky tests

abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals (nuxt)
abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step (hono)
abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step (nuxt)
abortFromStepWorkflow: step abort cancels an in-flight sibling step (nextjs-webpack)
abortFromStepWorkflow: step abort cancels an in-flight sibling step (nuxt)
abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal (hono)
abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires (nextjs-webpack)
abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires (nuxt)
abortThrowIfAbortedWorkflow: throwIfAborted causes FatalError, no retries (astro)
cancelRun via CLI - cancelling a running workflow (nextjs-turbopack)
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously (sveltekit)
deploymentId: 'latest' is a no-op in non-Vercel worlds (sveltekit)
distributedAbortController - manual abort triggers signal (tanstack-start)
distributedAbortController - reconnect to existing controller (fastify)
hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (fastify)
hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (vite)
hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps (nextjs-webpack)
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered (nextjs-turbopack)
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered (tanstack-start)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (fastify)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (nextjs-turbopack)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (vite)
hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook (vite)
parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race (tanstack-start)
Promise.all of disjoint-key writes: every key lands (express)
Promise.all of disjoint-key writes: every key lands (fastify)
Promise.all of disjoint-key writes: every key lands (nextjs-turbopack)
Promise.all of disjoint-key writes: every key lands (nextjs-webpack)
Promise.all of disjoint-key writes: every key lands (sveltekit)
promiseRaceWorkflow (sveltekit)
resume-or-start route pattern - resumeHook retried after start() reaches the new run (express)
resume-or-start route pattern - resumeHook retried after start() reaches the new run (fastify)
RetryableError respects custom retryAfter delay (nuxt)
setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly (nextjs-turbopack)
setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly (tanstack-start)
sleepWinsRaceWorkflow (vite)
validation DX: invalid writes throw catchable FatalErrors naming rule and limit (nextjs-webpack)
validation DX: invalid writes throw catchable FatalErrors naming rule and limit (vite)
webhookWorkflow (hono)
workflow throws after awaited setAttributes: attribute still persists on the failed run (nextjs-webpack)
workflow throws after awaited setAttributes: attribute still persists on the failed run (sveltekit)

🛠 Infra Events (absorbed by the harness)

Platform anomalies the e2e harness detected and worked around (e.g. a run the queue never picked up, replaced by a fresh run). Clustered timestamps indicate a backend blip; a steady drip indicates a platform issue worth escalating.

34 infra events

cold-start-warmup · suite warmup (python) · at 20:54:59Z · abandoned wrun_41M0K1JB2J0GGG3VXDM9DQCKWQ · (+7 more)
run-pickup-stall · promiseAllWorkflow (python) · at 20:55:15Z · abandoned wrun_41M0K1P0680GY23CJRKYM70RAW
run-pickup-stall · parallelSleepWorkflow (python) · at 20:55:15Z · abandoned wrun_41M0K1P06F0GJDBNZYT4PP7JDZ
run-pickup-stall · sleepingWorkflow (python) · at 20:55:15Z · abandoned wrun_41M0K1P06F0GJDBNZYT4PP7JDY
run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 20:55:15Z · abandoned wrun_41M0K1P0M00GWCV3TSH8D2FYVX
run-pickup-stall · nullByteWorkflow (python) · at 20:55:15Z · abandoned wrun_41M0K1P06K0GZYK9FY984MD70H
run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 20:55:48Z · abandoned wrun_41M0K1Q07W0GPFDEY6PXKTFT5D
run-pickup-stall · nullByteWorkflow (python) · at 20:56:16Z · abandoned wrun_41M0K1QVV00GVA8GB2NPNEDK3R
run-pickup-stall · promiseAllWorkflow (python) · at 20:56:16Z · abandoned wrun_41M0K1QVXJ0GYAQN26711K4EST
run-pickup-stall · parallelSleepWorkflow (python) · at 20:56:16Z · abandoned wrun_41M0K1QVY30GJW6J5CGE397AG8
run-pickup-stall · sleepingWorkflow (python) · at 20:56:16Z · abandoned wrun_41M0K1QVV30GQSY0CEZ103ECC3
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 20:56:56Z · abandoned wrun_41M0K1R00J0GN0NF6PA9527TDD
run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 20:58:48Z · abandoned wrun_41M0K1TKQH0GS0559GVP24YVM4
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 20:58:49Z · abandoned wrun_41M0K1TQX50GWAQWAJDKS9SK6T
cold-start-warmup · suite warmup (tanstack-start) · at 20:59:09Z · abandoned wrun_01M0K1WSX8QRMNX6B2A6FN6AW0
cold-start-warmup · suite warmup (python) · at 20:59:24Z · abandoned wrun_01M0K1TE0PSDRGGMQVHA600PF5 · (+7 more)
run-pickup-stall · deploymentId: 'latest' is a no-op in non-Vercel worlds (python) · at 20:59:39Z · abandoned wrun_01M0K1Y35FVT4DGMRY0AJDBPDQ
run-pickup-stall · sleepingWorkflow (python) · at 20:59:39Z · abandoned wrun_01M0K1Y35NM9H5PSE84EFG30FJ
run-pickup-stall · promiseAllWorkflow (python) · at 20:59:39Z · abandoned wrun_01M0K1Y35GZJNASTCZZV3CSNCX
run-pickup-stall · parallelSleepWorkflow (python) · at 20:59:39Z · abandoned wrun_01M0K1Y35RBPCYRKYQB5N9EDDW
run-pickup-stall · nullByteWorkflow (python) · at 20:59:39Z · abandoned wrun_01M0K1Y35TYATYXKVS861TFSRJ
run-pickup-stall · deploymentId: 'latest' is a no-op in non-Vercel worlds (python) · at 21:00:39Z · abandoned wrun_01M0K1ZXS6AQGRFQD9NXWHK0EA
run-pickup-stall · promiseAllWorkflow (python) · at 21:00:39Z · abandoned wrun_01M0K1ZXSA5WYE5204H9P4HX0E
run-pickup-stall · sleepingWorkflow (python) · at 21:00:39Z · abandoned wrun_01M0K1ZXSE3Y8PD7GYV5ZP0PEP
run-pickup-stall · parallelSleepWorkflow (python) · at 21:00:39Z · abandoned wrun_01M0K1ZXSHD98ARYYENNBXK63G
run-pickup-stall · nullByteWorkflow (python) · at 21:00:39Z · abandoned wrun_01M0K1ZXSKWF5104EAA5SC4858
run-pickup-stall · AllInOneService.processNumber - static workflow method using sibling static step methods (nuxt) · at 21:01:36Z · abandoned wrun_01M0K21P0PN0VNXR8GEM4CSBMN
run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 21:01:39Z · abandoned wrun_01M0K21RCSDBZEHNTJ32GBQD0F
run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 21:01:39Z · abandoned wrun_01M0K21RD5C02AJEHP3HGSNC0W
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 21:01:39Z · abandoned wrun_01M0K21RD2P6A30VBRSR6VS8SZ
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 21:02:09Z · abandoned wrun_01M0K22NRWWZF0YV8WYS0BYVVE
run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 21:02:09Z · abandoned wrun_01M0K22NRVP3G1N7SAM5GS8ZD9
run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 21:02:39Z · abandoned wrun_01M0K23K08E2XA0RVQCMZDPE13
run-pickup-stall · pathsAliasWorkflow - TypeScript path aliases resolve correctly (nextjs-webpack) · at 21:05:55Z · abandoned wrun_01M0K29K1E9P9YWYSZ3W7VAQQB

E2E Test Summary

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	3348	230	742	4320
✅ 💻 Local Development	3922	0	558	4480
✅ 📦 Local Production	3922	0	558	4480
✅ 🐘 Local Postgres	3922	0	558	4480
✅ 🪟 Windows	320	0	0	320
❌ 🌐 Cross-language Conformance	0	9	132	141
✅ vercel-multi-region	27	0	0	27
Total	15461	239	2548	18248

Details by Category

❌ ▲ Vercel Production

App	Passed	Failed	Skipped
❌ astro-node	126	6	28
❌ astro-quickjs	125	7	28
❌ example-node	122	10	28
❌ example-quickjs	118	14	28
❌ express-node	121	11	28
❌ express-quickjs	122	10	28
❌ fastify-node	124	8	28
❌ fastify-quickjs	121	11	28
❌ hono-node	122	10	28
❌ hono-quickjs	124	8	28
❌ nest-node	124	8	28
❌ nest-quickjs	120	12	28
❌ nextjs-turbopack-node	154	3	3
❌ nextjs-turbopack-quickjs	150	7	3
❌ nextjs-webpack-node	150	7	3
❌ nextjs-webpack-quickjs	147	10	3
❌ nitro-node	125	7	28
❌ nitro-quickjs	121	11	28
❌ nuxt-node	121	11	28
❌ nuxt-quickjs	129	3	28
❌ python-node	0	8	152
❌ sveltekit-node	144	7	9
❌ sveltekit-quickjs	142	9	9
❌ tanstack-start-node	127	5	28
❌ tanstack-start-quickjs	123	9	28
❌ vite-node	125	7	28
❌ vite-quickjs	121	11	28

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable-node	134	26
✅ astro-stable-quickjs	134	26
✅ express-stable-node	134	26
✅ express-stable-quickjs	134	26
✅ fastify-stable-node	134	26
✅ fastify-stable-quickjs	134	26
✅ hono-stable-node	134	26
✅ hono-stable-quickjs	134	26
✅ nest-stable-node	134	26
✅ nest-stable-quickjs	134	26
✅ nextjs-turbopack-canary-node	141	19
✅ nextjs-turbopack-canary-quickjs	141	19
✅ nextjs-turbopack-stable-node	160	0
✅ nextjs-turbopack-stable-quickjs	160	0
✅ nextjs-webpack-canary-node	141	19
✅ nextjs-webpack-canary-quickjs	141	19
✅ nextjs-webpack-stable-node	160	0
✅ nextjs-webpack-stable-quickjs	160	0
✅ nitro-stable-node	134	26
✅ nitro-stable-quickjs	134	26
✅ nuxt-stable-node	134	26
✅ nuxt-stable-quickjs	134	26
✅ sveltekit-stable-node	153	7
✅ sveltekit-stable-quickjs	153	7
✅ tanstack-start-node	134	26
✅ tanstack-start-quickjs	134	26
✅ vite-stable-node	134	26
✅ vite-stable-quickjs	134	26

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable-node	134	26
✅ astro-stable-quickjs	134	26
✅ express-stable-node	134	26
✅ express-stable-quickjs	134	26
✅ fastify-stable-node	134	26
✅ fastify-stable-quickjs	134	26
✅ hono-stable-node	134	26
✅ hono-stable-quickjs	134	26
✅ nest-stable-node	134	26
✅ nest-stable-quickjs	134	26
✅ nextjs-turbopack-canary-node	141	19
✅ nextjs-turbopack-canary-quickjs	141	19
✅ nextjs-turbopack-stable-node	160	0
✅ nextjs-turbopack-stable-quickjs	160	0
✅ nextjs-webpack-canary-node	141	19
✅ nextjs-webpack-canary-quickjs	141	19
✅ nextjs-webpack-stable-node	160	0
✅ nextjs-webpack-stable-quickjs	160	0
✅ nitro-stable-node	134	26
✅ nitro-stable-quickjs	134	26
✅ nuxt-stable-node	134	26
✅ nuxt-stable-quickjs	134	26
✅ sveltekit-stable-node	153	7
✅ sveltekit-stable-quickjs	153	7
✅ tanstack-start-node	134	26
✅ tanstack-start-quickjs	134	26
✅ vite-stable-node	134	26
✅ vite-stable-quickjs	134	26

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable-node	134	26
✅ astro-stable-quickjs	134	26
✅ express-stable-node	134	26
✅ express-stable-quickjs	134	26
✅ fastify-stable-node	134	26
✅ fastify-stable-quickjs	134	26
✅ hono-stable-node	134	26
✅ hono-stable-quickjs	134	26
✅ nest-stable-node	134	26
✅ nest-stable-quickjs	134	26
✅ nextjs-turbopack-canary-node	141	19
✅ nextjs-turbopack-canary-quickjs	141	19
✅ nextjs-turbopack-stable-node	160	0
✅ nextjs-turbopack-stable-quickjs	160	0
✅ nextjs-webpack-canary-node	141	19
✅ nextjs-webpack-canary-quickjs	141	19
✅ nextjs-webpack-stable-node	160	0
✅ nextjs-webpack-stable-quickjs	160	0
✅ nitro-stable-node	134	26
✅ nitro-stable-quickjs	134	26
✅ nuxt-stable-node	134	26
✅ nuxt-stable-quickjs	134	26
✅ sveltekit-stable-node	153	7
✅ sveltekit-stable-quickjs	153	7
✅ tanstack-start-node	134	26
✅ tanstack-start-quickjs	134	26
✅ vite-stable-node	134	26
✅ vite-stable-quickjs	134	26

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	160	0	0
✅ nextjs-turbopack-quickjs	160	0	0

❌ 🌐 Cross-language Conformance

App	Passed	Failed	Skipped
❌ python	0	9	132

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

📋 View full workflow run

github-actions · 2026-08-14T03:57:14Z

Sim World

Simulated world deterministic testing for races. Traces

🟠 world-sim scenario book — 1 fail of 41 total

fence=per-spec

scenario	outcome	events	virt	replay
✅ `smoke-no-steps`	completed	3	0ms	ok
✅ `smoke-one-step`	completed	6	0ms	ok
✅ `hook-at-step-started`	completed	12	0ms	ok
✅ `hook-at-step-completed`	completed	12	0ms	ok
✅ `hook-at-hook-created`	completed	12	0ms	ok
✅ `deadline-hook-wins`	completed	7	1.0h	ok
✅ `deadline-expires`	completed	7	1.0h	ok
✅ `long-sleep`	completed	11	30.0d	ok
✅ `hook-never-arrives`	stalled	3	0ms	skipped
✅ `step-retries-twice`	completed	10	2.0s	ok
✅ `parallel-steps`	completed	9	0ms	ok
✅ `hook-on-execution-state`	completed	12	0ms	ok
✅ `peek-hook-before-branch`	completed	12	0ms	ok
✅ `peek-hook-after-branch`	completed	12	0ms	ok
✅ `peek-hook-at-registration`	completed	12	0ms	ok
✅ `race-hook-before-probe`	completed	12	0ms	ok
✅ `race-hook-after-probe`	completed	12	0ms	ok
✅ `race-duplicate-delivery`	completed	13	0ms	ok
✅ `attr-hook-before-step`	completed	11	0ms	ok
✅ `attr-hook-after-step`	completed	11	0ms	ok
✅ `attr-from-step-body`	completed	13	0ms	ok
✅ `fork-hook-after-timeout`	completed	14	1.0m	ok
✅ `fork-hook-before-timeout`	completed	14	1.0m	ok
✅ `count-hook-after-timeout`	completed	17	1.0m	ok
✅ `count-hook-before-timeout`	completed	20	1.0m	ok
✅ `stale-read-step-count-fork`	completed	20	1.0m	ok
✅ `stale-read-equal-step-counts`	completed	14	1.0m	ok
✅ `step-vs-step-fork`	completed	12	0ms	ok
✅ `step-vs-step-fork-fenced`	completed	12	0ms	ok
✅ `fence-catches-benign-direction`	completed	12	5ms	ok
✅ `in-flight-before-decision`	completed	17	1.0m	ok
❌ `in-flight-before-decision-counted`	completed	17	1.0m	ok
✅ `in-flight-after-decision`	completed	19	2.0m	ok
✅ `stale-read-step-count-fork-fenced`	completed	20	1.0m	ok
✅ `fork-hook-wins`	completed	13	1.0m	ok
✅ `fork-timeout-wins`	completed	13	1.0m	ok
✅ `unclaimed-payload-under-fork`	completed	17	1.0m	ok
✅ `claimed-payload-under-fork`	completed	17	1.0m	ok
✅ `writers-independent-step-bodies`	completed	12	0ms	ok
✅ `writers-scripted-tempo`	completed	12	0ms	ok
✅ `cancel-mid-step`	cancelled	7	0ms	skipped

Full trace: world-sim.txt

github-actions · 2026-08-14T03:57:22Z

📊 Workflow Benchmarks

❌ The benchmark run for 84b7a5a failed. See the run logs for details.

commit 31488ca · Fri, 21 Aug 2026 10:38:22 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	478 (-29%) 💚	1395 🔴 (+35%) 🔻	1441 🔴 (+30%) 🔻	1505 🔴 (±0%)	30
TTFS	stream	1056 (+284%) 🔻	1361 🔴 (+25%) 🔻	1376 🔴 (+25%) 🔻	1445 🔴 (+27%) 🔻	30
TTFS	hook + stream	630 (-51%) 💚	1681 🔴 (+18%) 🔻	1721 🔴 (+3.5%)	2004 🔴 (-57%) 💚	30
Fan-out TTFS	Promise.all(100 steps)	540 (+24%) 🔻	718 (+16%) 🔻	750 (+12%)	2407 (+23%) 🔻	10
Fan-out TTLS	Promise.all(100 steps)	4264 (-2.8%)	6796 (-9.3%)	7180 (-6.3%)	16329 (+85%) 🔻	10
STSO	1020 steps (inline)	112 (-12%)	178 (-27%) 💚	236 (-17%) 💚	333 (-27%) 💚	1019
WO	1020 steps	175515 (-24%) 💚	175515 (-24%) 💚	175515 (-24%) 💚	175515 (-24%) 💚	1
CRTT	first chunk (pooled)	81 (-8.0%)	168 (+30%) 🔻	237 (+58%) 🔻	512 (+27%) 🔻	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	126 (+18%)	117 (-5%)	274 (+29%)	584 (+15%)	104 (-17%)	10
size sweep (100/s, 160B-12KB)	113 (+9%)	117 (-11%)	157 (-29%)	372 (-31%)	108 (-34%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	111 (-18%)	164 (+21%)	309 (+51%)	566 (+2%)	238 (+65%)	3
replay eve-gpt-5.6-sol-2000t (1x)	130 (-49%)	120 (-51%)	183 (-87%)	641 (-86%)	560 (-76%)	2
replay eve-gpt-5.6-sol-2000t (2x)	157 (+5%)	135 (-24%)	185 (-41%)	348 (-64%)	189 (-67%)	3

📜 Previous results (2)

`e0181d4`

Thu, 20 Aug 2026 18:00:09 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	1245 (+21%) 🔻	1310 🔴 (+16%) 🔻	1332 🔴 (+14%)	1362 🔴 (+11%)	30
TTFS	stream	249 (+40%) 🔻	1304 🔴 (+16%) 🔻	1319 🔴 (+17%) 🔻	1341 🔴 (+14%)	30
TTFS	hook + stream	506 (+1.8%)	1608 🔴 (+12%)	1636 🔴 (+11%)	1917 🔴 (+24%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	585 (+47%) 🔻	894 (±0%)	903 (-48%) 💚	2043 (+8.2%)	10
Fan-out TTLS	Promise.all(100 steps)	4666 (-2.6%)	5220 (-16%) 💚	5258 (-16%) 💚	7418 (+2.9%)	10
STSO	1020 steps (inline)	124 (+3.3%)	243 (-1.6%)	288 (-4.0%)	501 (-0.6%)	1019
WO	1020 steps	230339 (-3.0%)	230339 (-3.0%)	230339 (-3.0%)	230339 (-3.0%)	1
CRTT	first chunk (pooled)	87 (-5.4%)	162 (+23%) 🔻	267 (+77%) 🔻	360 (+118%) 🔻	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	106 (-13%)	124 (-14%)	162 (-39%)	230 (-79%)	91.5 (-38%)	10
size sweep (100/s, 160B-12KB)	138 (+6%)	161 (-27%)	375 (-28%)	637 (-18%)	141 (-48%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	136 (+12%)	167 (+14%)	1978 (+673%)	3686 (+424%)	570 (+10%)	3
replay eve-gpt-5.6-sol-2000t (1x)	248 (+95%)	108 (-29%)	158 (-38%)	525 (-37%)	354 (-29%)	2
replay eve-gpt-5.6-sol-2000t (2x)	178 (+46%)	160 (-24%)	229 (-29%)	775 (-77%)	469 (-22%)	3

`2e2fa27`

Wed, 19 Aug 2026 17:27:53 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	1335 (+365%) 🔻	1401 🔴 (+20%) 🔻	1405 🔴 (+4.9%)	1417 🔴 (-9.3%)	30
TTFS	stream	1344 (+611%) 🔻	1429 🔴 (+28%) 🔻	1491 🔴 (+31%) 🔻	1529 🔴 (+31%) 🔻	30
TTFS	hook + stream	1360 (+4.2%)	1741 🔴 (+26%) 🔻	1838 🔴 (+30%) 🔻	2018 🔴 (+18%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	1009 (-8.7%)	1379 (-40%) 💚	1465 (-47%) 💚	2996 (+8.1%)	10
Fan-out TTLS	Promise.all(100 steps)	5087 (-3.7%)	6123 (-8.0%)	6777 (-1.5%)	10450 (+33%) 🔻	10
STSO	1020 steps (inline)	109 (-17%) 💚	221 (-16%) 💚	246 (-19%) 💚	379 (-25%) 💚	1019
WO	1020 steps	213351 (-14%)	213351 (-14%)	213351 (-14%)	213351 (-14%)	1
CRTT	first chunk (pooled)	86 (+2.4%)	111 (-13%)	172 (-45%) 💚	239 (-62%) 💚	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	104 (-8%)	142 (-14%)	645 (+178%)	4192 (+802%)	142 (-11%)	10
size sweep (100/s, 160B-12KB)	101 (-6%)	128 (-17%)	183 (-35%)	373 (-45%)	149 (-7%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	99 (-12%)	122 (-56%)	149 (-80%)	461 (-69%)	369 (-39%)	3
replay eve-gpt-5.6-sol-2000t (1x)	174 (+12%)	181 (+29%)	319 (+66%)	449 (-29%)	365 (-25%)	2
replay eve-gpt-5.6-sol-2000t (2x)	106 (-79%)	263 (-35%)	452 (-84%)	955 (-77%)	530 (-12%)	3

ℹ️ Metric definitions & methodology

_{Streams: first-chunk RTT (the stream-open path, before any buffering/backpressure), CRTT percentiles, and worst delivery stall (CDV max). Cells are medians across iterations; per-run values in the artifacts. No 🔴/🟢 marks until targets attach.}

_{Best/P75/P90/P99 deltas compare against the most recent benchmark run on main at the time of this run. 🔻 flags a delta worse than +15%, 💚 one better than −15%.}

_{Metrics — TTFS: time to first step body (in-deployment start() → first step body) · Fan-out TTFS: fan-out time to first step (in-deployment start() → first of the parallel step bodies to complete) · Fan-out TTLS: fan-out time to last step (in-deployment start() → last of the parallel step bodies to complete, i.e. when the Promise.all resolves) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · CRTT: chunk round-trip time (per-chunk write → read latency, one clock domain: deployment → stream backend → same deployment) · CDV: chunk delay variation / delivery jitter (inter-arrival gap minus inter-write gap per seq-adjacent pair; skew-free; the row is each run's MAX positive value, so one stall moves it)}

_{Scenarios — step: one trivial no-op step, no stream; no hooks, so the run stays in turbo mode (in-process fast path) · stream: one streaming step; no hooks, so the run stays in turbo mode (in-process fast path) · hook + stream: registers a hook before one step, which exits turbo mode (dispatch path) · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges, and WO is the whole-run overhead outside step bodies · Promise.all(100 steps): 100 trivial no-op steps started together in a single Promise.all; Fan-out TTFS is the first of them to complete and Fan-out TTLS the last, both from the in-deployment clientStart, so their gap is the spread the runtime adds across the fan-out · paced control (100/s, 60B): the control: 300 tiny (~60B) deltas metronome-paced at 100/s — zero workload structure, so it reads the transport floor and flush cadence, and disambiguates transport-wide vs workload-specific when a replay row moves · size sweep (100/s, 160B-12KB): same pacing as the control with deltas padded in rotation across seven log-spaced sizes (~160B–12KB) — rotation decouples size from stream position, so it isolates whether chunk size causes latency · replay gateway-gpt-5.4-nano-2000t (1x): raw provider SSE cadence captured at the AI gateway boundary (gpt-5.4-nano, the most popular gateway model; per-token deltas p50 208B = the modal production chunk size), replayed exactly as measured — the typical customer's workload; its CDV is the typical customer's real delivery jitter · replay eve-gpt-5.6-sol-2000t (1x): a captured eve turn (gpt-5.6-sol, the most-used demanding eve model; ~2000 output tokens = production p50 turn length) replayed exactly as measured — eve's envelope protocol re-ships the cumulative message so sizes ramp 142B→13KB; the demanding outlier tenant's reality · replay eve-gpt-5.6-sol-2000t (2x): the same eve capture at 2x — the headroom/stress row; real fast-tier models emit the same chunk sizes at proportionally higher rate, so time compression is a faithful speed model · first chunk (pooled): every run's seq-0 RTT pooled across all stream scenarios — the first chunk precedes any workload differentiation, so pooling samples one shared stream-open path with exact percentiles}

_{Replay cadences (semantic sha256) — eve-gpt-5.6-sol-2000t eaf22f5946e7c61f3c65c7006d550df180cfabd4e706254a09f22aec0cfb420d · gateway-gpt-5.4-nano-2000t 6f24ac518b6b83ff1d0e85a5fe78230db192716d66a7fc6b2fe022752001d041}

_{🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600}

_{All timestamps are deployment-side; runs are triggered in-deployment, so the CI runner and api.vercel.com sit outside every measured window. TTFS = start() → first step body (includes dispatch + any cold start); Fan-out TTFS/TTLS = first/last step completion of one Promise.all from the same anchor (the gap is the runtime’s fan-out spread); STSO/WO between step bodies; CRTT inside the workflow (excludes the api.vercel.com read path).}

_{Cold starts stay in the numbers (real bursty-workload latency, inflates P75+); Best is the warm floor.}

VaguelySerious

AI review: no blocking issues

VaguelySerious · 2026-08-21T20:27:03Z

+}
+
+async function decompressGzip(payload: Uint8Array): Promise<Uint8Array> {
+  if (nativeGzip) return nativeGzip.decompress(payload);


AI Review: Note

The gzip read path silently switches from the streaming codec to a blocking synchronous one. main's decompress always went through gunzipBytes → pipeThroughTransform(data, new DecompressionStream('gzip')); this prefers nativeGzip.decompress, i.e. zlib.gunzipSync, whenever process.getBuiltinModule resolves — Node 22.3+, so effectively every current runtime.

That matters because of what sits above it in this stack. #3548 starts preparation for every binary payload in the log as frames arrive, so a replay of a long run now runs N gunzipSync calls. Each is its own microtask, but the inflation inside each one blocks the event loop, where previously the work was spread across stream pumps. Any run still carrying gzip-prefixed payloads (written by a pre-zstd runtime, or with WORKFLOW_COMPRESSION_CODEC=gzip) gets that as a synchronous burst on the TTFS path.

The write path has the same shape at line 163 but a smaller blast radius: zstd wins selectWriteCodec on Node 22.15+, so sync gzip writes only affect Node 22.3–22.14 and the explicit gzip override. Note the zstd write path was already zstdCompressSync on main, so that half is not new.

Neither change is mentioned in the PR body or the changeset. If preferring native is deliberate for the latency win, it is worth saying so and confirming the sync burst is acceptable; if it is incidental to the extraction, keeping DecompressionStream for gzip would preserve the old behaviour.

I checked the things that could have gone wrong here and they are fine: ZSTD_LEVEL = 3 still reaches zstdCompressSync via the ZSTD_c_compressionLevel param mapping, canCompressGzip and the gzip/decompressGzip fallbacks agree so selectWriteCodec cannot pick a codec it then fails to run, and process.getBuiltinModule is the same resolution mechanism main used, so Node 18/20 keep the portable path rather than losing compression.

VaguelySerious

AI review: no blocking issues (re-review of the new fix(world): preserve omitted event payloads commit; the rest of the series is unchanged from my last review)

VaguelySerious · 2026-08-21T22:27:02Z

+ * stored event so the strict serialized-data schema can still distinguish an
+ * omitted read payload from a malformed create request.
+ */
+function restoreOmittedEventPayload(value: unknown): unknown {


AI Review: Note

I verified the underlying break is real, and it is narrower than the fix. Parsing the four eventData shapes an empty-body v4 frame can present at decodeEventFrame's EventSchema.parse(meta):

frame meta shape before this commit after

step_completed, eventData absent REJECTS (eventData) PARSES

step_completed, eventData: {}, no result PARSES PARSES

run_started, eventData: {}, no input PARSES PARSES

hook_received, eventData without payload PARSES PARSES

So only the eventData entirely absent shape was rejecting — a missing payload key inside a present eventData already parsed. That one shape is exactly what stripEventDataRefs emits, since it deletes the ref fields and then drops eventData when nothing is left. Worth fixing.

The concern is that the preprocessor is much wider than the shape it repairs. It injects the payload key into every payload-bearing event, so a run_created that previously parsed to eventData keys [deploymentId, workflowName] now parses to [deploymentId, workflowName, input], and 'input' in eventData flips false → true. Your own test codifies that with toHaveProperty('input', undefined). Since only the absent-eventData case needed help, making eventData optional (or .default({})) on the affected schemas would fix it without changing the parsed shape of every other event.

That shape change is observable past the parse boundary — cbor-x encodes an explicit undefined as CBOR f7 rather than omitting the key:

encode({x:1}) -> b90001617801 encode({x:1, input:undefined}) -> b9000261780165696e707574f7 decode(...) keys -> ['x', 'input']

So a parsed event that is ever re-encoded carries a key it did not have before. I looked for somewhere that bites and did not find one — the two Object.keys(eventData) sites are both safe (stripEventDataRefs uses delete, so its length check still sees 0; analyticsEventToEvent builds eventData from scratch and never parses). Flagging it because it is the kind of thing that surfaces later at a wire boundary rather than here.

Secondary: the preprocessor runs on every event parse and allocates two objects per event on the injection path, which is the resolveData: 'none' bulk-listing path — the one that exists specifically to avoid per-payload work, and the one #3548 now drives per frame.

One more thing worth separating out: origin/main rejects the same absent-eventData shape (verified against 5a59bb82e8). If a live read path re-parses a stripped event, that is a production bug being repaired as the 24th commit of a refactor PR three levels deep in a stack, where it will never be found again. I could not confirm such a path — world-postgres and world-local both parse then strip, so the stripped shape is not re-validated in-process — but if you did hit this for real, it deserves its own PR against main with the reproducing case.

VaguelySerious · 2026-08-21T22:27:02Z

-    events: z.undefined(),
-    cursor: z.undefined(),
-    hasMore: z.undefined(),
+    // Materialized writes omit page metadata entirely. Zod 4.4 correctly


AI Review: Nit

This comment is the most useful sentence in the commit and it is on the wrong change — the z.undefined()-is-required behaviour is what motivates the EventSchema preprocessor too, but that hunk explains itself only as "worlds may omit a payload field" with no mention of the Zod version bump that changed the rule.

Worth repeating the Zod 4.4 rationale at restoreOmittedEventPayload, and worth a line in the changeset: the schema-loosening half is user-visible for anyone validating events with the exported EventSchema, and the current changeset text ("Simplify payload codecs and reuse prepared replay payloads across workflow VMs") does not hint at it.

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NathanColosimo changed the title ~~Decode replay payloads synchronously~~ [core] Decode replay payloads synchronously Aug 14, 2026

This was referenced Aug 14, 2026

[world-vercel] Resume partial replay streams after validated events #3546

Open

[core] Prepare replay payloads as event frames arrive #3548

Open

[core] Trace fresh workflow replay phases #3523

Open

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NathanColosimo force-pushed the codex/replay-sync-decode branch from 84e27c4 to 1e92acf Compare August 14, 2026 03:56

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VaguelySerious approved these changes Aug 21, 2026

View reviewed changes

NathanColosimo added 24 commits August 21, 2026 13:45

Decode replay payloads synchronously

c3629e6

[core] Simplify synchronous replay decoding

83caa95

[core] Simplify synchronous replay payload APIs

4a2522f

[core] Deepen payload codec boundaries

72aa4a0

[core] Consolidate payload codecs

6371868

[core] Avoid native codec result copies

a636a91

[core] Reuse loaded encryption helpers

9c65380

[core] Fix legacy replay payload tagging

f7e814d

[core] Consolidate replay decryption

558d811

[core] Consolidate replay preparation types

2d1a6f5

[cli] Remove encryption resolver wrapper type

25643d1

[cli] Use the decryption capability type directly

48970df

[cli] Sort hydration imports

474d502

refactor(serialization): centralize format handling

37d7e8d

refactor(world-vercel): keep payload normalization explicit

4f033e7

refactor(serialization): share replay format codecs

b504fb1

refactor(core): simplify replay payload decoding

dad628b

fix(core): validate serialized QuickJS step inputs

5dc97c8

fix(core): preserve corrupt observability payloads

9f88815

refactor(core): standardize replay crypto on Web Crypto

28ee7a8

fix(core): preserve replay codec contracts

d0f8e2f

test: preserve runtime codec compatibility

23bf032

style: organize serialization imports

22b1ffe

fix(world): preserve omitted event payloads

84b7a5a

VaguelySerious approved these changes Aug 21, 2026

View reviewed changes

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[core] Simplify replay payload preparation - #3547

[core] Simplify replay payload preparation#3547
NathanColosimo wants to merge 24 commits into
codex/replay-stream-recoveryfrom
codex/replay-sync-decode

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frame meta shape	before this commit	after
`step_completed`, `eventData` absent	REJECTS (`eventData`)	PARSES
`step_completed`, `eventData: {}`, no `result`	PARSES	PARSES
`run_started`, `eventData: {}`, no `input`	PARSES	PARSES
`hook_received`, `eventData` without `payload`	PARSES	PARSES

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Summary

Why Web Crypto

Replay boundary

Compatibility

Stack

Validation

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🦋 Changeset detected

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🧪 E2E Test Results

❌ Failed E2E Tests

🌐 Cross-language Conformance (9 failed)

⚠️ Flaky E2E Tests (passed on retry)

🛠 Infra Events (absorbed by the harness)

E2E Test Summary

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Sim World

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📊 Workflow Benchmarks

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AI Review: Note

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