[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127

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[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
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debug/event-log-replay-trace

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@TooTallNateTooTallNate commented May 27, 2026

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Summary

Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.

What it does

Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:

  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.

All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.

How to use

Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.

Notes

  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.

@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
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⚠️ No Changeset found

Latest commit: 3da0595

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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Click here to learn what changesets are, and how to add one.

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

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🧪 E2E Test Results

❌ Some tests failed

Summary

PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836

❌ Failed Tests

▲ Vercel Production (2 failed)

express (1 failed):

  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools

nextjs-webpack (1 failed):

  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)

mongodb-dev (1 failed):

  • dev e2e should rebuild on imported step dependency change

redis-dev (1 failed):

  • dev e2e should rebuild on imported step dependency change

turso-dev (1 failed):

  • dev e2e should rebuild on imported step dependency change

turso (66 failed):

  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK

Details by Category

❌ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro8107
✅ example8107
❌ express8017
✅ fastify8107
✅ hono8107
✅ nextjs-turbopack8602
❌ nextjs-webpack8512
✅ nitro8107
✅ nuxt8107
✅ sveltekit8107
✅ vite8107
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack8800
❌ 🌍 Community Worlds
AppPassedFailedSkipped
❌ mongodb-dev410
❌ redis-dev410
❌ turso-dev410
❌ turso3660
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable8206
✅ e2e-local-dev-tanstack-start-stable8206
✅ e2e-local-postgres-nest-stable8206
✅ e2e-local-postgres-tanstack-start-stable8206
✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206

📋 View full workflow run

❌ Some E2E test jobs failed:

  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success

Check the workflow run for details.

@TooTallNateTooTallNate mentioned this pull request May 28, 2026
Draft
4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed to Preview – workflow-docs May 28, 2026 07:17 Inactive
@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed to Preview – workflow-docs May 28, 2026 07:38 Inactive
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@TooTallNate
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
Closed
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
Closed
[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
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@TooTallNate
@TooTallNateTooTallNate
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May 27, 2026

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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
@changeset-bot
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May 27, 2026•

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⚠️ No Changeset found
Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
This PR includes no changesets
When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types
Click here to learn what changesets are, and how to add one.
Click here if you're a maintainer who wants to add a changeset to this PR
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May 27, 2026•

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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-nextjs-workflow-webpackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-astro-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-express-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-fastify-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-hono-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-nitro-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-nuxt-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-sveltekit-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-tanstack-start-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-vite-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workflow-swc-playgroundReadyReadyPreview, CommentMay 28, 2026 7:42am
workflow-tarballsReadyReadyPreview, CommentMay 28, 2026 7:42am
workflow-webReadyReadyPreview, CommentMay 28, 2026 7:42am
1 Skipped Deployment
ProjectDeploymentActionsUpdated (UTC)
workflow-docsSkippedSkippedMay 28, 2026 7:42am
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
Details by Category
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✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
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✅ sveltekit-stable8206
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✅ express-stable8206
✅ fastify-stable8206
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✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
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✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
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❌ 🌍 Community Worlds
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❌ mongodb-dev410
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✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206
📋 View full workflow run
❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
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@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:17
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@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
Closed
TooTallNate wants to merge 4 commits into
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debug/event-log-replay-trace
Closed
[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
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@TooTallNateTooTallNate
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May 27, 2026

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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
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⚠️ No Changeset found
Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentMay 28, 2026 7:42am
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1 Skipped Deployment
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
Details by Category
❌ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro8107
✅ example8107
❌ express8017
✅ fastify8107
✅ hono8107
✅ nextjs-turbopack8602
❌ nextjs-webpack8512
✅ nitro8107
✅ nuxt8107
✅ sveltekit8107
✅ vite8107
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack8800
❌ 🌍 Community Worlds
AppPassedFailedSkipped
❌ mongodb-dev410
❌ redis-dev410
❌ turso-dev410
❌ turso3660
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable8206
✅ e2e-local-dev-tanstack-start-stable8206
✅ e2e-local-postgres-nest-stable8206
✅ e2e-local-postgres-tanstack-start-stable8206
✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206
📋 View full workflow run
❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
Check the workflow run for details.
@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
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Preview – workflow-docs
May 28, 2026 07:17
Inactive

@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
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TooTallNate wants to merge 4 commits into
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debug/event-log-replay-trace
Closed
[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
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debug/event-log-replay-trace
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@TooTallNateTooTallNate
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May 27, 2026

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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
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⚠️ No Changeset found
Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
This PR includes no changesets
When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types
Click here to learn what changesets are, and how to add one.
Click here if you're a maintainer who wants to add a changeset to this PR
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ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-nextjs-workflow-webpackReadyReadyPreview, CommentMay 28, 2026 7:42am
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1 Skipped Deployment
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
Details by Category
❌ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro8107
✅ example8107
❌ express8017
✅ fastify8107
✅ hono8107
✅ nextjs-turbopack8602
❌ nextjs-webpack8512
✅ nitro8107
✅ nuxt8107
✅ sveltekit8107
✅ vite8107
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack8800
❌ 🌍 Community Worlds
AppPassedFailedSkipped
❌ mongodb-dev410
❌ redis-dev410
❌ turso-dev410
❌ turso3660
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable8206
✅ e2e-local-dev-tanstack-start-stable8206
✅ e2e-local-postgres-nest-stable8206
✅ e2e-local-postgres-tanstack-start-stable8206
✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206
📋 View full workflow run
❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
Check the workflow run for details.
@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:17
Inactive

@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
Closed
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
Closed
[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
Conversation
@TooTallNate
@TooTallNateTooTallNate
commented
May 27, 2026

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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
@changeset-bot
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May 27, 2026•

edited

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⚠️ No Changeset found
Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
This PR includes no changesets
When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types
Click here to learn what changesets are, and how to add one.
Click here if you're a maintainer who wants to add a changeset to this PR
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
Details by Category
❌ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro8107
✅ example8107
❌ express8017
✅ fastify8107
✅ hono8107
✅ nextjs-turbopack8602
❌ nextjs-webpack8512
✅ nitro8107
✅ nuxt8107
✅ sveltekit8107
✅ vite8107
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack8800
❌ 🌍 Community Worlds
AppPassedFailedSkipped
❌ mongodb-dev410
❌ redis-dev410
❌ turso-dev410
❌ turso3660
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable8206
✅ e2e-local-dev-tanstack-start-stable8206
✅ e2e-local-postgres-nest-stable8206
✅ e2e-local-postgres-tanstack-start-stable8206
✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206
📋 View full workflow run
❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
Check the workflow run for details.
@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:17
Inactive

@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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@TooTallNate

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
Closed
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
Closed
[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
Conversation
@TooTallNate
@TooTallNateTooTallNate
commented
May 27, 2026

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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
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May 27, 2026•

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⚠️ No Changeset found
Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
This PR includes no changesets
When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types
Click here to learn what changesets are, and how to add one.
Click here if you're a maintainer who wants to add a changeset to this PR
@vercel
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May 27, 2026•

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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-nextjs-workflow-webpackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-astro-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-express-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-fastify-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-hono-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-nitro-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-nuxt-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-sveltekit-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-tanstack-start-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-vite-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workflow-swc-playgroundReadyReadyPreview, CommentMay 28, 2026 7:42am
workflow-tarballsReadyReadyPreview, CommentMay 28, 2026 7:42am
workflow-webReadyReadyPreview, CommentMay 28, 2026 7:42am
1 Skipped Deployment
ProjectDeploymentActionsUpdated (UTC)
workflow-docsSkippedSkippedMay 28, 2026 7:42am
@github-actions
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commented
May 27, 2026•

edited

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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
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✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
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✅ astro-stable8206
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✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
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❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
Check the workflow run for details.
@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
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Preview – workflow-docs
May 28, 2026 07:17
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@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
Closed
TooTallNate wants to merge 4 commits into
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debug/event-log-replay-trace
Closed
[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
stablefrom 
debug/event-log-replay-trace
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@TooTallNate
@TooTallNateTooTallNate
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May 27, 2026

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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
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⚠️ No Changeset found
Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
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The latest updates on your projects. Learn more about Vercel for GitHub.
ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-nextjs-workflow-webpackReadyReadyPreview, CommentMay 28, 2026 7:42am
example-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
workbench-astro-workflowReadyReadyPreview, CommentMay 28, 2026 7:42am
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1 Skipped Deployment
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
Details by Category
❌ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro8107
✅ example8107
❌ express8017
✅ fastify8107
✅ hono8107
✅ nextjs-turbopack8602
❌ nextjs-webpack8512
✅ nitro8107
✅ nuxt8107
✅ sveltekit8107
✅ vite8107
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack8800
❌ 🌍 Community Worlds
AppPassedFailedSkipped
❌ mongodb-dev410
❌ redis-dev410
❌ turso-dev410
❌ turso3660
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable8206
✅ e2e-local-dev-tanstack-start-stable8206
✅ e2e-local-postgres-nest-stable8206
✅ e2e-local-postgres-tanstack-start-stable8206
✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206
📋 View full workflow run
❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
Check the workflow run for details.
@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:17
Inactive

@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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[DEBUG] Trace replay event log and step/hook/sleep assignments - #2127
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[DEBUG] Trace replay event log and step/hook/sleep assignments#2127
TooTallNate wants to merge 4 commits into
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debug/event-log-replay-trace
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@TooTallNateTooTallNate
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Summary
Temporary diagnostic instrumentation to investigate intermittent CorruptedEventLogError "step consumer mismatch" failures. Not for merging. Branched off stable so the CI tarball can be deployed against the repro app.
What it does
Emits console.log lines tagged WF_TRACE at four points so we can diff successive replays of the same runId:
  • runWorkflow start (packages/core/src/workflow.ts) — dumps the full event array the replay will consume: eventId, eventType, correlationId, eventData.stepName/resumeAt, plus a sha256 digest for quick equality checks.
  • step/hook/sleep subscribe (packages/core/src/step.ts, workflow/hook.ts, workflow/sleep.ts) — per-replay assignment of correlationId → stepName/token/resumeAt, with a monotonic per-invocation seq.
  • Step consumer mismatch (packages/core/src/step.ts) — structured record of the failure including the offending event's index in the SDK's view of the log.
  • runWorkflow end — completed | failed | suspended.
All logging routed through a single throwaway helper packages/core/src/__debug-replay-trace.ts so the diff is easy to revert.
How to use
Trigger the repro app, grep Vercel runtime logs for WF_TRACE, then group lines by runId + inv to compare what each replay invocation saw. If digest differs between two replay_start lines for the same runId, the event array is unstable across replays — root cause is on the server side. If digest matches but the step subscribe seq+stepName mapping differs, the SDK is the source of non-determinism.
Notes
  • No existing tests broken (all 622 unit tests in @workflow/core pass).
  • No new TypeScript errors (baseline 22 pre-existing on stable, still 22 after).
  • Adds a non-trivial amount of log volume per replay; intended to be reverted once the bug is diagnosed.
@TooTallNate
[DEBUG] Trace replay event log and step/hook/sleep assignments
a0c45b4
Temporary diagnostic instrumentation for investigating intermittent
CorruptedEventLogError 'step consumer mismatch' failures.
Emits console.log lines tagged 'WF_TRACE' at four points:
- runWorkflow start: dumps the full event array the replay will consume
(eventIds, types, correlationIds, stepNames) plus a sha256 digest
- step/hook/sleep subscribe: per-replay correlationId -> name assignment
- step consumer mismatch: structured record of the failure including the
event index in the SDK's view of the log
- runWorkflow end: completed | failed | suspended
Used to diff successive replays of the same runId and confirm whether
the SDK actually sees the same event array each time.
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Latest commit: 3da0595
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
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ProjectDeploymentActionsUpdated (UTC)
example-nextjs-workflow-turbopackReadyReadyPreview, CommentMay 28, 2026 7:42am
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🧪 E2E Test Results
❌ Some tests failed
Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production899267968
✅ 💻 Local Development9700861056
✅ 📦 Local Production9700861056
✅ 🐘 Local Postgres9700861056
✅ 🪟 Windows880088
❌ 🌍 Community Worlds1569084
✅ 📋 Other492036528
Total4404713614836
❌ Failed Tests
▲ Vercel Production (2 failed)
express (1 failed):
  • DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
nextjs-webpack (1 failed):
  • DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
🌍 Community Worlds (69 failed)
mongodb-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
redis-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso-dev (1 failed):
  • dev e2e should rebuild on imported step dependency change
turso (66 failed):
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • addTenWorkflow | wrun_01KSPRDTTCB0E5JXA30BX5CQN3
  • wellKnownAgentWorkflow (.well-known/agent) | wrun_01KSPRF03Z0GHMRR4Z1XBMR8GH
  • should work with react rendering in step
  • promiseAllWorkflow | wrun_01KSPRE2DC2936JDEZZFT1AXDF
  • promiseRaceWorkflow | wrun_01KSPRE6PCZE9T9VVW8N17QA4J
  • promiseAnyWorkflow | wrun_01KSPRE8ZSV8WM1PMPE9MA1GJB
  • importedStepOnlyWorkflow | wrun_01KSPRFAY50EYBZSAS95775KA2
  • readableStreamWorkflow | wrun_01KSPRECH2GD8E2332X7VE4DM4
  • hookWorkflow | wrun_01KSPRESBMWHSKPQDDQ3V61RRP
  • hookWorkflow is not resumable via public webhook endpoint | wrun_01KSPREZEXEZ4R95RM7TXZGBZ0
  • webhookWorkflow | wrun_01KSPRF3MC7G97K8QX5Z7302YX
  • sleepingWorkflow | wrun_01KSPRF9Z7RCST2R37TMC6G32Q
  • parallelSleepWorkflow | wrun_01KSPRFRW5YQZZE9NEVPQN56QN
  • nullByteWorkflow | wrun_01KSPRFX1SYFQET6ZGEEHR282G
  • workflowAndStepMetadataWorkflow | wrun_01KSPRG09APXDXKQ3HM5HNPKTD
  • 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_01KSPRJESG995F00KC2YC26SE6
  • fetchWorkflow | wrun_01KSPRJX06F06772AT18KDXB4J
  • promiseRaceStressTestWorkflow | wrun_01KSPRK0B2S6C3NNR86GZMY3BS
  • 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_01KSPRP2VC877M7Z1M2H2BXWA5
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_01KSPRPCTZ8H16Y3A3XKGWE1BN
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_01KSPRPSX1CDCGNG1SPM3W1ZC4
  • stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars) | wrun_01KSPRQ7XBDWTK0WPTAHCAHR31
  • stepFunctionWithClosureWorkflow - step function with closure variables passed as argument | wrun_01KSPRQFMYFYN4YERC3CB1A525
  • closureVariableWorkflow - nested step functions with closure variables | wrun_01KSPRQMHFDS3W0CWGRE142PKN
  • spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_01KSPRQPME39ENG4KGKGWE2Z4Z
  • 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_01KSPRR4ATKPJ1N4244SZDNHXB
  • Calculator.calculate - static workflow method using static step methods from another class | wrun_01KSPRR9D7WRFZ2A4Q9AFFDRK6
  • AllInOneService.processNumber - static workflow method using sibling static step methods | wrun_01KSPRRF8A70ZRY49EJFGMG48Y
  • ChainableService.processWithThis - static step methods using this to reference the class | wrun_01KSPRRN7VEDSY2T1BSVYGN51P
  • thisSerializationWorkflow - step function invoked with .call() and .apply() | wrun_01KSPRRV7ZNB1GP2CP4T0Z5NST
  • customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE | wrun_01KSPRS2Q4D2ZXV7V0SADM116Y
  • instanceMethodStepWorkflow - instance methods with "use step" directive | wrun_01KSPRS9TV1JZVF8BF65CRZT1Z
  • crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context | wrun_01KSPRSNXK302P1NF2KV2TBAAJ
  • stepFunctionAsStartArgWorkflow - step function reference passed as start() argument | wrun_01KSPRSY9E963BJGH21P28H031
  • cancelRun - cancelling a running workflow | wrun_01KSPRT5BXFFT23DYJ5MY08VFA
  • cancelRun via CLI - cancelling a running workflow | wrun_01KSPRTE13CNSQZ313E48KQ6WP
  • 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_01KSPRTRYJ8T6XWG60WK99QF9P
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_01KSPRV7T4ERS0WBE2FHFQ5N2P
  • sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_01KSPRVJM9CXBKHJ66C84NNTW8
  • importMetaUrlWorkflow - import.meta.url is available in step bundles | wrun_01KSPRVRYWRH1N9BZ518GTAKJJ
  • metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_01KSPRVVXV9VA0AFG6G4P7F8DR
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_01KSPRVXSAS5K3VAVYE7GXZ8QK
Details by Category
❌ ▲ Vercel Production
AppPassedFailedSkipped
✅ astro8107
✅ example8107
❌ express8017
✅ fastify8107
✅ hono8107
✅ nextjs-turbopack8602
❌ nextjs-webpack8512
✅ nitro8107
✅ nuxt8107
✅ sveltekit8107
✅ vite8107
✅ 💻 Local Development
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 📦 Local Production
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🐘 Local Postgres
AppPassedFailedSkipped
✅ astro-stable8206
✅ express-stable8206
✅ fastify-stable8206
✅ hono-stable8206
✅ nextjs-turbopack-canary69019
✅ nextjs-turbopack-stable8800
✅ nextjs-webpack-canary69019
✅ nextjs-webpack-stable8800
✅ nitro-stable8206
✅ nuxt-stable8206
✅ sveltekit-stable8206
✅ vite-stable8206
✅ 🪟 Windows
AppPassedFailedSkipped
✅ nextjs-turbopack8800
❌ 🌍 Community Worlds
AppPassedFailedSkipped
❌ mongodb-dev410
❌ redis-dev410
❌ turso-dev410
❌ turso3660
✅ 📋 Other
AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable8206
✅ e2e-local-dev-tanstack-start-stable8206
✅ e2e-local-postgres-nest-stable8206
✅ e2e-local-postgres-tanstack-start-stable8206
✅ e2e-local-prod-nest-stable8206
✅ e2e-local-prod-tanstack-start-stable8206
📋 View full workflow run
❌ Some E2E test jobs failed:
  • Vercel Prod: failure
  • Local Dev: success
  • Local Prod: success
  • Local Postgres: success
  • Windows: success
Check the workflow run for details.
@TooTallNateTooTallNate
mentioned this pull request
May 28, 2026
 Draft

4 tasks
@TooTallNate
[DEBUG] Point world-vercel at workflow-server PR 456 preview
ad9d426
Set WORKFLOW_SERVER_URL_OVERRIDE to https://workflow-server-7pxaxn4d4.vercel.sh
to validate Pranay's monotonic-append fix (workflow-server#456) against the
hook/sleep stress repro.
If the preview server correctly reorders events so eventIds reflect commit
order (instead of letting a slow hook_received commit with an early eventId
behind a wait_completed that committed first), the corrupted-event-log
failures should disappear without any SDK-side fencing changes.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:17
Inactive

@TooTallNate
[DEBUG] Drop x-vercel-set-bypass-cookie from protection-bypass header
3da0595
The set-bypass-cookie flow triggers a 307 redirect-and-set-cookie response
intended for browsers. Node's fetch in the SDK doesn't follow the cookie
dance, so it loops on the 307. Vercel's docs are explicit that for
API-client usage the bare x-vercel-protection-bypass header should
authenticate each request directly, without set-bypass-cookie.
@vercel
vercelBottemporarily deployed
to
Preview – workflow-docs
May 28, 2026 07:38
Inactive

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