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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530

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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt#2530
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Automated backport of #2525 to stable (backport job run).

AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.

Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.

@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
@github-actions
github-actionsBot requested a review from a team as a code ownerJune 18, 2026 22:29
@github-actionsgithub-actionsBot mentioned this pull request Jun 18, 2026
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🦋 Changeset detected

Latest commit: 1ca4688

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

This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch

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example-nextjs-workflow-turbopackReadyReadyPreview, CommentJun 29, 2026 7:36pm
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🧪 E2E Test Results

❌ Some tests failed

Summary

PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689

❌ Failed Tests

🌍 Community Worlds (99 failed)

redis (19 failed):

  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q

turso (80 failed):

  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q

Details by Category

✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606

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@TooTallNate
Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
@TooTallNate
TooTallNate requested a review from ijjk as a code ownerJune 29, 2026 19:32
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TooTallNate commented Jun 29, 2026•
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Closing without merging — skipping this backport.

To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.

We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:

  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.

If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.

@TooTallNate
TooTallNate deleted the backport/pr-2525-to-stable branch June 29, 2026 20:23
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt#2530
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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
@github-actions
github-actionsBot
requested a review
from a team
as a code ownerJune 18, 2026 22:29
@github-actionsgithub-actionsBot
mentioned this pull request
Jun 18, 2026
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Jun 18, 2026•

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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch
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
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentJun 29, 2026 7:36pm
example-nextjs-workflow-webpackReadyReadyPreview, CommentJun 29, 2026 7:36pm
example-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-astro-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-express-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-fastify-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-hono-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-nitro-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-nuxt-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-sveltekit-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-tanstack-start-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-vite-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jun 29, 2026 7:36pm
workflow-swc-playgroundReadyReadyPreview, CommentJun 29, 2026 7:36pm
workflow-tarballsReadyReadyPreview, CommentJun 29, 2026 7:36pm
workflow-webReadyReadyPreview, CommentJun 29, 2026 7:36pm
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
📋 View full workflow run
@TooTallNate
Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
@TooTallNate
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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
@TooTallNate
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June 29, 2026 20:23
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt#2530
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Jun 18, 2026

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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
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Jun 18, 2026
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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch
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
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Jun 18, 2026•

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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentJun 29, 2026 7:36pm
example-nextjs-workflow-webpackReadyReadyPreview, CommentJun 29, 2026 7:36pm
example-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-astro-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-express-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-fastify-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-hono-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-nitro-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-nuxt-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-sveltekit-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-tanstack-start-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workbench-vite-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
workflow-docsReadyReadyPreview, Comment, Open in v0Jun 29, 2026 7:36pm
workflow-swc-playgroundReadyReadyPreview, CommentJun 29, 2026 7:36pm
workflow-tarballsReadyReadyPreview, CommentJun 29, 2026 7:36pm
workflow-webReadyReadyPreview, CommentJun 29, 2026 7:36pm
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Jun 19, 2026•

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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
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✅ astro9408
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✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
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✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
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Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530
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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch
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Click here if you're a maintainer who wants to add another changeset to this PR
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
📋 View full workflow run
@TooTallNate
Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530
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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
@github-actions
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Jun 18, 2026
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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch
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
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
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@TooTallNate
Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530
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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch
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Click here if you're a maintainer who wants to add another changeset to this PR
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentJun 29, 2026 7:36pm
example-nextjs-workflow-webpackReadyReadyPreview, CommentJun 29, 2026 7:36pm
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workbench-astro-workflowReadyReadyPreview, CommentJun 29, 2026 7:36pm
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
📋 View full workflow run
@TooTallNate
Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
@TooTallNate
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requested a review
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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
@TooTallNate
TooTallNate
deleted the

backport/pr-2525-to-stable

branch
June 29, 2026 20:23
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
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Jun 18, 2026
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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
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@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
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✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
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✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
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Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt by github-actions[bot] · Pull Request #2530 · vercel/workflow · GitHub
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt - #2530
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Backport #2525: perf(core): decouple workflow VM seed/clock from startedAt#2530
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Automated backport of #2525 to stable (backport job run).
AI recommendation: This is a self-contained change to @workflow/core's VM seed/clock derivation, and the targeted code (packages/core/src/workflow.ts, including the exact ${runId}:${workflowName}:${+startedAt} seed formula it replaces) already exists on stable, so it does not build on any main-only API. It carries an in-flight-replay migration caveat that the included changeset documents, but the change applies equally to both branches and a human can review the resulting PR.
Merge conflicts were resolved by AI (opencode with anthropic/claude-opus-4.8). Please review the conflict resolution carefully before merging.
@github-actions
perf(core): decouple workflow VM seed/clock from startedAt (#2525)
18b1479
Derive the deterministic RNG seed from `runId:workflowName:deploymentId`
and the VM's initial fixed clock from the ULID timestamp embedded in
`runId` (via the new `runIdCreatedAt` helper). All of these inputs are
available the instant a queue message arrives, so the VM seed and clock
no longer depend on `startedAt` (set only after the `run_started`
round-trip). This is the prerequisite for starting VM initialization
earlier on the critical path.
This changes the seed-derived value sequence for a given run, so the
affected deterministic test fixtures are regenerated accordingly.
Signed-off-by: Nathan Rajlich <n@n8.io>
@github-actions
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Jun 18, 2026
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🦋 Changeset detected
Latest commit: 1ca4688
The changes in this PR will be included in the next version bump.
This PR includes changesets to release 16 packages
NameType
@workflow/coreMinor
@workflow/buildersPatch
@workflow/cliPatch
@workflow/nextPatch
@workflow/nitroPatch
@workflow/vitestPatch
@workflow/web-sharedPatch
@workflow/webPatch
workflowMinor
@workflow/world-testingPatch
@workflow/astroPatch
@workflow/nestPatch
@workflow/rollupPatch
@workflow/sveltekitPatch
@workflow/vitePatch
@workflow/nuxtPatch
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentJun 29, 2026 7:36pm
example-nextjs-workflow-webpackReadyReadyPreview, CommentJun 29, 2026 7:36pm
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production10440781122
✅ 💻 Local Development11380861224
✅ 📦 Local Production11380861224
✅ 🐘 Local Postgres11260981224
✅ 🪟 Windows10200102
❌ 🌍 Community Worlds76996181
✅ 📋 Other574038612
Total5198993925689
❌ Failed Tests
🌍 Community Worlds (99 failed)
redis (19 failed):
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • pages router sleepingWorkflow via pages router
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
turso (80 failed):
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • addTenWorkflow | wrun_01KWAE0Y7MRGNGGMXB1RRPZFJW
  • deploymentId: 'latest' is a no-op in non-Vercel worlds
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KWAE2J5YHSJ6WQZFZY1WAC04
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KWAE16DX12P3D64SSGYQSMEK
  • promiseRaceWorkflow | wrun_01KWAE19YBK3ZJG5ZZ09QFQJQ8
  • promiseAnyWorkflow | wrun_01KWAE1DARRTVBQQHY152NHJZB
  • importedStepOnlyWorkflow | wrun_01KWAE2V4BS2A9TQ23VQERH61M
  • readableStreamWorkflow | wrun_01KWAE1FSNGSBAXT1PYG3MAH1A
  • hookWorkflow | wrun_01KWAE1WZTK38KSVWX2G9HSPQ2
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KWAE24Q4ZDRT5QH03HKV43JX
  • webhookWorkflow | wrun_01KWAE29G23KYQETTYXBCYB572
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race | wrun_01KWAE2M9WPSQNSFN1WA2QNJXM
  • sleepingWorkflow | wrun_01KWAE3VYE77AW1EN33TCCYH42
  • parallelSleepWorkflow | wrun_01KWAE4B6EHZGV8J0JBBZHNGZH
  • nullByteWorkflow | wrun_01KWAE4FQGZ07PMJD8ZPW21HR1
  • workflowAndStepMetadataWorkflow | wrun_01KWAE4HX6D9F2Y69NT90W72SS
  • outputStreamWorkflow no startIndex (reads all chunks)
  • outputStreamWorkflow positive startIndex (skips first chunk)
  • outputStreamWorkflow negative startIndex (reads from end)
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns correct index after stream completes
  • outputStreamWorkflow - getTailIndex and getStreamChunks getTailIndex returns -1 before any chunks are written
  • outputStreamWorkflow - getTailIndex and getStreamChunks getStreamChunks returns same content as reading the stream
  • outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_01KWAE72H63ZJFV3XSD18B7APQ
  • writableForwardedFromWorkflowWorkflow | wrun_01KWAE7J53TSRCH4WGTDARKF24
  • writableForwardedFromStepWorkflow | wrun_01KWAE7PE6ZKBG1PCN99A28ZN6
  • fetchWorkflow | wrun_01KWAE7SVZ4KEGM0VR303FEKZV
  • promiseRaceStressTestWorkflow | wrun_01KWAE7X957C3555Q5RCY0EGK2
  • error handling error propagation workflow errors nested function calls preserve message and stack trace
  • error handling error propagation workflow errors cross-file imports preserve message and stack trace
  • error handling error propagation step errors basic step error preserves message and stack trace
  • error handling error propagation step errors cross-file step error preserves message and function names in stack
  • error handling retry behavior regular Error retries until success
  • error handling retry behavior FatalError fails immediately without retries
  • error handling retry behavior RetryableError respects custom retryAfter delay
  • error handling retry behavior maxRetries=0 disables retries
  • error handling catchability FatalError can be caught and detected with FatalError.is()
  • error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
  • error handling not registered StepNotRegisteredError fails the step but workflow can catch it
  • error handling not registered StepNotRegisteredError fails the run when not caught in workflow
  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_01KWAEBF0JFB15A6FC23J9QE6C
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KWAEBVKS029E3RD4ZCDKFQ3K
  • hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_01KWAEC7DJZBA8665W0HDBAVSH
  • 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_01KWAECA5K29VMVZ7PNWSRVTRP
  • 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_01KWAECCJGY52WW9DNQFJMPBX1
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_01KWAECEXV89WGHN7KH0MMBKB4
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_01KWAECY67N2H7NH1QNB7NYMRT
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_01KWAEDSYV3T1Y2AE14WRJPZXZ
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_01KWAEDZ3W87KAJ9HH9DCE70FG
  • hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_01KWAEE6FNST9SMHD8E18E74TR
  • hookSupersedeOwnerWorkflow - duplicate cancels the owner and claims the released token | wrun_01KWAEECWD1EAFDMKJKW11MRXG
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_01KWAEEPJTJXNN6FB3WHSGZQV2
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KWAEEYB84TV53TGQ6G4BZ414
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KWAEFDMD2ZDE95PJTQYA6RMT
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KWAEFPHBANMR2WRV49N9J5AA
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KWAEFW42SB08W1WMH12TAYJ4
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KWAEFY7YW5YDWZY031J7F9BY
  • health check (queue-based) - workflow and step endpoints respond to health check messages
  • health check (CLI) - workflow health command reports healthy endpoints
  • pathsAliasWorkflow - TypeScript path aliases resolve correctly | wrun_01KWAEGFPDQWENY4Z4PMRCV900
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KWAEGNFQMQJBT4DYV337GWHG
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KWAEGWD60CX04T8M4XKYR4P4
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KWAEH3E8MQXA8EZ9PHE29751
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KWAEHAAB2DJPR31MVGCVK1S1
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KWAEHH17CFE0DSQPEKM1WG40
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KWAEHRXPY151XWG0BWS0QXJ1
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KWAEJ95XG5R0J29X2J32GSQD
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KWAEJJ8PVZ5HD2JXD7DBTC2Q
  • cancelRun - cancelling a running workflow | wrun_01KWAEJVCC3PS0KBJRXF37FAJY
  • cancelRun via CLI - cancelling a running workflow | wrun_01KWAEK4NQMRJ05RSDHGJXTDZ2
  • pages router addTenWorkflow via pages router
  • pages router promiseAllWorkflow via pages router
  • pages router sleepingWorkflow via pages router
  • hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_01KWAEKGVC464VQP5GSEBDFCYE
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KWAEM0QJF0YXDA4FRFQHY5TY
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KWAEMD715CS4NSM7DZ4X9EAN
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KWAEMN6PRF9D6SE6BGE6H5E2
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KWAEMQHB0Y427A2ZV474YGPB
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KWAEMTTT98PVJSAG61T71X7Q
Details by Category
✅ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro9408
✅ example9408
✅ express9408
✅ fastify9408
✅ hono9408
✅ nextjs-turbopack9903
✅ nextjs-webpack9903
✅ nitro9408
✅ nuxt9408
✅ sveltekit9408
✅ vite9408
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable9606
✅ express-stable9606
✅ fastify-stable9606
✅ hono-stable9606
✅ nextjs-turbopack-canary83019
✅ nextjs-turbopack-stable10200
✅ nextjs-webpack-canary83019
✅ nextjs-webpack-stable10200
✅ nitro-stable9606
✅ nuxt-stable9606
✅ sveltekit-stable9606
✅ vite-stable9606
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable9507
✅ express-stable9507
✅ fastify-stable9507
✅ hono-stable9507
✅ nextjs-turbopack-canary82020
✅ nextjs-turbopack-stable10101
✅ nextjs-webpack-canary82020
✅ nextjs-webpack-stable10101
✅ nitro-stable9507
✅ nuxt-stable9507
✅ sveltekit-stable9507
✅ vite-stable9507
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack10200
❌ 🌍 Community Worlds
AppPassedFailedSkipped
✅ mongodb-dev302
✅ redis-dev302
❌ redis64190
✅ turso-dev302
❌ turso3800
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable9606
✅ e2e-local-dev-tanstack-start-stable9606
✅ e2e-local-postgres-nest-stable9507
✅ e2e-local-postgres-tanstack-start-stable9507
✅ e2e-local-prod-nest-stable9606
✅ e2e-local-prod-tanstack-start-stable9606
📋 View full workflow run
@TooTallNate
Merge remote-tracking branch 'origin/stable' into backport/pr-2525-to…
1ca4688
…-stable
# Conflicts:
#	packages/core/src/workflow.ts
@TooTallNate
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requested a review
from ijjk
as a code ownerJune 29, 2026 19:32
@TooTallNate
TooTallNate
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Jun 29, 2026•

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Closing without merging — skipping this backport.
To be precise about the dependency chain: #2525 (decoupling the workflow VM seed/clock from startedAt) was landed on main as a prerequisite for #2526 "[core] Turbo mode: fast-path the first invocation", which has since landed on main. Turbo mode lets the VM reach its first steps with no preceding network round-trips, which is only safe once the VM seed/clock no longer depend on the startedAt timestamp (set only after the run_started round-trip) — that is exactly what #2525 enables.
We are not backporting turbo mode (#2526) to stable, so #2525 provides no standalone benefit here:
  • On its own, perf(core): decouple workflow VM seed/clock from startedAt #2525 only changes the deterministic RNG seed sequence for a given run (seed derived from runId:workflowName:deploymentId instead of including startedAt), with no functional or performance upside absent the turbo-mode work that consumes it.
  • Backporting it would churn the seed-derived value sequence and the affected deterministic test fixtures on stable for no reason — risk without reward.
If turbo mode (#2526) is ever backported, this prerequisite (#2525) should be brought along with it.
@TooTallNate
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deleted the

backport/pr-2525-to-stable

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June 29, 2026 20:23
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