Re-apply "[release] Exit changeset pre mode for v5, tie core and world-vercel versions together" (#3090) by VaguelySerious · Pull Request #4362 · vercel/workflow

VaguelySerious · 2026-09-24T16:10:09Z

Re-applies #3090, undoing its revert in #4195.

Restores: exiting changesets pre-release mode, adding @workflow/world-vercel to the fixed group with workflow/@workflow/core, deriving GitHub Release prerelease/latest flags from the published version rather than branch name, and reading pre.tag in both pre and exit mode in check-published.mjs.

Verified main is still genuinely in pre-release mode (.changeset/pre.json mode pre, current version 5.0.0-beta.56) before recreating this, so this isn't reapplying on top of a state that already moved past it.

Draft on purpose, same as #3090 — merging this arms the GA publish.

🤖 Generated with Claude Code

…d world-vercel versions together" (#3090) (#4195)" This reverts commit 413ada5.

changeset-bot · 2026-09-24T16:10:15Z

🦋 Changeset detected

Latest commit: d3cb2dd

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

This PR includes changesets to release 27 packages

Name	Type
@workflow/ai	Patch
@workflow/astro	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/core	Patch
@workflow/errors	Patch
@workflow/nest	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/nuxt	Patch
@workflow/rollup	Patch
@workflow/serde	Patch
@workflow/sveltekit	Patch
@workflow/swc-plugin	Patch
@workflow/tsconfig	Patch
@workflow/typescript-plugin	Patch
@workflow/utils	Patch
@workflow/vite	Patch
@workflow/vitest	Patch
@workflow/web-shared	Patch
@workflow/web	Patch
workflow	Patch
@workflow/world-local	Patch
@workflow/world-postgres	Patch
@workflow/world-testing	Patch
@workflow/world-vercel	Patch
@workflow/world	Patch

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

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

vercel · 2026-09-24T16:10:18Z

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

Project	Deployment	Actions	Updated
example-nextjs-workflow-turbopack	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
example-nextjs-workflow-webpack	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
example-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-astro-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-express-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-fastify-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-hono-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-nestjs-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-nitro-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-nuxt-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-python-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-sveltekit-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-tanstack-start-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workbench-vite-workflow	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workflow-docs	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workflow-swc-playground	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workflow-tarballs	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC
workflow-web	Ready	Preview, v0	Sep 24, 2026 4:13pm UTC

github-actions · 2026-09-24T16:10:28Z

🧪 E2E Test Results

❌ Some tests failed

❌ Failed E2E Tests

▲ Vercel Production (62 failed)

python-node (62 failed):

promiseAllWorkflow | wrun_41M3A2ZTQH0GY5Q359W67E9ATN | 🔍 observability
promiseRaceWorkflow | wrun_41M3A2ZTQH0GY5Q359W67E9ATP | 🔍 observability
promiseAnyWorkflow | wrun_41M3A2ZTQH0GY5Q359W67E9ATQ | 🔍 observability
retainedInterleavingWorkflow | wrun_41M3A3017V0GG5VKGNW183V8C5 | 🔍 observability
hookWorkflow | wrun_41M3A306WM0GZNNQ4NT0J8WAKM | 🔍 observability
hookWorkflow is not resumable via public webhook endpoint | wrun_41M3A306ZW0GTSH6SGEVSS12JS | 🔍 observability
sleepingWorkflow | wrun_41M3A30GRX0GGJJ8EKM629JN31 | 🔍 observability
parallelSleepWorkflow | wrun_41M3A30GSX0GHZSJ27MB369DE5 | 🔍 observability
sleepWinsRaceWorkflow | wrun_41M3A30KN80GVHPKA539GFR3MP | 🔍 observability
stepWinsRaceWorkflow | wrun_41M3A30MYY0GTWVPBDKD98BKW1 | 🔍 observability
nullByteWorkflow | wrun_41M3A30QQH0GG6WG9N0MV97DNZ | 🔍 observability
outputStreamWorkflow no startIndex (reads all chunks)
outputStreamWorkflow positive startIndex (skips first chunk)
outputStreamWorkflow negative startIndex (reads from end)
outputStreamWorkflow - getTailIndex and getChunks getTailIndex returns correct index after stream completes
outputStreamWorkflow - getTailIndex and getChunks getChunks returns same content as reading the stream
outputStreamInsideStepWorkflow - getWritable() called inside step functions | wrun_41M3A31DP10GRM9K124W1KF0F3 | 🔍 observability
utf8StreamWorkflow | wrun_41M3A31E130GVXS4NP1Y995SW2 | 🔍 observability
writableForwardedFromWorkflowWorkflow | wrun_41M3A31E1R0GZR72RSKEAKMRYY | 🔍 observability
writableForwardedFromStepWorkflow | wrun_41M3A31J0Q0GG6BHVM4Z953JBT | 🔍 observability
promiseRaceStressTestWorkflow | wrun_41M3A31JFY0GXG0F9DRYN5KSE4 | 🔍 observability
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 catchability step throw round-trips FatalError with cause chain to workflow catch
error handling catchability workflow throw round-trips FatalError + cause through run_failed event
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_41M3A3374D0GX9MFN89PWDZPDR | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M3A3377M0GX8Y61PYPBV4YHZ | 🔍 observability
hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload | wrun_41M3A338700GNSGHR0ENMGABRR | 🔍 observability
'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution | wrun_41M3A339PQ0GT4HG175CRX2YH8 | 🔍 observability
'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution | wrun_41M3A33C9Y0GNA7NS7JEK7W3DW | 🔍 observability
hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps | wrun_41M3A33CT20GH4TY4R7XMM999Z | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M3A33H520GH4QAQ5TA80DBJH | 🔍 observability
hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data | wrun_41M3A344WB0GGHXYJCHHMCNHXR | 🔍 observability
hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_41M3A33XN90GJ9BBA0V09JQ24G | 🔍 observability
hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook | wrun_41M3A33XYX0GZS3844FFS252J6 | 🔍 observability
resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_41M3A34JBV0GHMGGSFBXHCRGG5 | 🔍 observability
hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running | wrun_41M3A34RSE0GRGXT75SGFQEXJ5 | 🔍 observability
hookTokenReuseLoopWorkflow - same run recreates a hook with the same token after dispose() | wrun_41M3A34R560GK56WJ4TXN93VK1 | 🔍 observability
spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step | wrun_41M3A3571S0GW8JY03SG1ES1ND | 🔍 observability
cancelRun - cancelling a running workflow | wrun_41M3A366NR0GYAVWG6QNJHXNVF | 🔍 observability
cancelRun via CLI - cancelling a running workflow | wrun_41M3A36A850GGFWZH12AZNH33P | 🔍 observability
hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep | wrun_41M3A36AMY0GGB6S4M0TQGHN64 | 🔍 observability
hookWithSleepFinalStepWorkflow - step only on final payload | wrun_41M3A36DM70GK7MF85G14EH5T5 | 🔍 observability
sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M3A36E3A0GTSBE82MAHSXB54 | 🔍 observability
sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) | wrun_41M3A36GHV0GG7XT6KWG07Y5TX | 🔍 observability
AbortController abortTimeoutWorkflow: timeout cancels long-running step
AbortController abortParallelWorkflow: abort cancels all parallel steps
AbortController abortReasonWorkflow: abort reason preserved across boundaries
AbortController abortViaHookWorkflow: external hook triggers abort on in-flight step
metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577) | wrun_41M3A36ZJV0GXH453NHXMEMCG4 | 🔍 observability
resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M3A370AM0GYJJEQF5Z5DVCBA | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

⚠️ Flaky E2E Tests (passed on retry)

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

health check (CLI) - workflow health command reports healthy endpoints (nextjs-webpack · local-dev / local / quickjs / stable)
mixed provider and function tools (sveltekit · vercel-prod / vercel / node / production)
resumes in flight during the takeover are never lost: each lands in exactly one log (vite · local-dev / local / quickjs / stable)
webhookWorkflow (nest · local-dev / local / quickjs / stable)

🛠 Infra Events (absorbed by the harness)

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

125 infra events

cold-start-warmup · suite warmup (tanstack-start) · at 16:13:03Z · abandoned wrun_01M3A31C889MNB29Z6Q7V9MZWC
cold-start-warmup · suite warmup (python) · at 16:13:07Z · abandoned wrun_41M3A2YNYZ0GP1997ZRQTNQD0Y · (+7 more)
run-pickup-stall · promiseAllWorkflow (python) · at 16:13:23Z · abandoned wrun_41M3A32AXF0GW2NA5GVX5VDX43
run-pickup-stall · hookWorkflow (python) · at 16:13:23Z · abandoned wrun_41M3A32AXN0GYNWEA6P0NVMP28
run-pickup-stall · retainedInterleavingWorkflow (python) · at 16:13:23Z · abandoned wrun_41M3A32AXF0GW2NA5GVX5VDX46
run-pickup-stall · promiseAnyWorkflow (python) · at 16:13:23Z · abandoned wrun_41M3A32AXF0GW2NA5GVX5VDX45
run-pickup-stall · promiseRaceWorkflow (python) · at 16:13:24Z · abandoned wrun_41M3A32AXF0GW2NA5GVX5VDX44
run-pickup-stall · retainedInterleavingWorkflow (python) · at 16:14:11Z · abandoned wrun_41M3A33SA10GMDZRXAJFRW804E
run-pickup-stall · hookWorkflow (python) · at 16:14:11Z · abandoned wrun_41M3A33SFX0GTZA5Q79C7D0XMJ
run-pickup-stall · promiseAllWorkflow (python) · at 16:14:24Z · abandoned wrun_41M3A346BF0GPKFH2A5J4SQSC2
run-pickup-stall · promiseRaceWorkflow (python) · at 16:14:24Z · abandoned wrun_41M3A346C50GZK1D8C57G5WSRC
run-pickup-stall · promiseAnyWorkflow (python) · at 16:14:24Z · abandoned wrun_41M3A346FM0GJ52R87VS81TWZK
run-pickup-stall · hookWorkflow is not resumable via public webhook endpoint (python) · at 16:14:58Z · abandoned wrun_41M3A357G70GH4M5SQ18BKVESD
run-pickup-stall · sleepingWorkflow (python) · at 16:14:58Z · abandoned wrun_41M3A357KA0GSCC5DA782MEJEX
run-pickup-stall · parallelSleepWorkflow (python) · at 16:15:26Z · abandoned wrun_41M3A362590GX10046NYHPRKEF
run-pickup-stall · stepWinsRaceWorkflow (python) · at 16:15:27Z · abandoned wrun_41M3A362WV0GKZY1ZWCAHC70Z5
run-pickup-stall · sleepWinsRaceWorkflow (python) · at 16:15:27Z · abandoned wrun_41M3A362D00GJW487WDG1C7W7H
run-pickup-stall · hookWorkflow is not resumable via public webhook endpoint (python) · at 16:16:55Z · abandoned wrun_41M3A37S8F0GGTV0FJ7YT9X3PV
run-pickup-stall · sleepingWorkflow (python) · at 16:16:55Z · abandoned wrun_41M3A37SEZ0GN6AW0F076FQ6RW
run-pickup-stall · parallelSleepWorkflow (python) · at 16:17:02Z · abandoned wrun_41M3A38T1T0GPDGRJ26JSH5D34
run-pickup-stall · sleepWinsRaceWorkflow (python) · at 16:17:02Z · abandoned wrun_41M3A38T9J0GKJS9080VP40Y8T
run-pickup-stall · stepWinsRaceWorkflow (python) · at 16:17:02Z · abandoned wrun_41M3A38TSB0GVFHAQ61VN9X96C
run-pickup-stall · nullByteWorkflow (python) · at 16:17:22Z · abandoned wrun_41M3A39MGS0GHR86D45HXMZD64
run-pickup-stall · no startIndex (reads all chunks) (python) · at 16:17:23Z · abandoned wrun_41M3A39MSX0GTVPA77HFG1K4W8
run-pickup-stall · cross-file step error preserves message and function names in stack (nextjs-webpack) · at 16:17:35Z · abandoned wrun_01M3A3A21TM5APC7YS5EMBNRS0
run-pickup-stall · hookCleanupTestWorkflow - hook token reuse after workflow completion (nextjs-webpack) · at 16:17:42Z · abandoned wrun_01M3A3A8TZX9E7X06RCN7V6CXB
run-pickup-stall · positive startIndex (skips first chunk) (python) · at 16:17:55Z · abandoned wrun_41M3A3AMMT0GZKS0R9MP4F4ZPD
run-pickup-stall · negative startIndex (reads from end) (python) · at 16:17:56Z · abandoned wrun_41M3A3AMWJ0GVR1THM38TAX9RJ
run-pickup-stall · getTailIndex returns correct index after stream completes (python) · at 16:17:58Z · abandoned wrun_41M3A3AQMS0GTJA8HYSWSDF2QC
run-pickup-stall · getTailIndex returns -1 before any chunks are written (python) · at 16:18:22Z · abandoned wrun_41M3A3BF3S0GWM3XKN01AN4187
run-pickup-stall · getChunks returns same content as reading the stream (python) · at 16:18:23Z · abandoned wrun_41M3A3BFCY0GH4JRSX68XS29SH
run-pickup-stall · outputStreamInsideStepWorkflow - getWritable() called inside step functions (python) · at 16:18:39Z · abandoned wrun_41M3A3BZ700GMB2SX6DH3NSNNE
run-pickup-stall · utf8StreamWorkflow (python) · at 16:18:55Z · abandoned wrun_41M3A3CF7V0GVF19W12W0H61Q2
run-pickup-stall · nullByteWorkflow (python) · at 16:18:58Z · abandoned wrun_41M3A3CJ7T0GNN48VKF389SBD3
run-pickup-stall · no startIndex (reads all chunks) (python) · at 16:18:59Z · abandoned wrun_41M3A3CJRZ0GY65G9KH74VDPH7
run-pickup-stall · positive startIndex (skips first chunk) (python) · at 16:19:23Z · abandoned wrun_41M3A3D9ZZ0GQGZ1Q4CQZHM4QG
run-pickup-stall · negative startIndex (reads from end) (python) · at 16:19:40Z · abandoned wrun_41M3A3DTHZ0GW886MT795XBAGQ
run-pickup-stall · getTailIndex returns correct index after stream completes (python) · at 16:19:59Z · abandoned wrun_41M3A3EDNB0GMRZM1BBCKJN4K9
run-pickup-stall · getChunks returns same content as reading the stream (python) · at 16:20:01Z · abandoned wrun_41M3A3EFNP0GXT9AER4G8PQ1MH
run-pickup-stall · outputStreamInsideStepWorkflow - getWritable() called inside step functions (python) · at 16:20:23Z · abandoned wrun_41M3A3F4JY0GYE4JNXV9FPKR6S
run-pickup-stall · writableForwardedFromWorkflowWorkflow (python) · at 16:20:40Z · abandoned wrun_41M3A3FN500GP4EM9Y05WYRQEX
run-pickup-stall · writableForwardedFromStepWorkflow (python) · at 16:20:58Z · abandoned wrun_41M3A3G6XY0GSYY2J8DW8WYS4F
run-pickup-stall · utf8StreamWorkflow (python) · at 16:20:59Z · abandoned wrun_41M3A3G88B0GST5FEC13NA3299
run-pickup-stall · promiseRaceStressTestWorkflow (python) · at 16:21:03Z · abandoned wrun_41M3A3GBYF0GXHRF884MH7DSP6
run-pickup-stall · regular Error retries until success (python) · at 16:21:23Z · abandoned wrun_41M3A3GZY60GVPSYD9F1H86G8X
run-pickup-stall · FatalError fails immediately without retries (python) · at 16:22:03Z · abandoned wrun_41M3A3J6HG0GMFS9028016GAZ6
run-pickup-stall · RetryableError respects custom retryAfter delay (python) · at 16:22:23Z · abandoned wrun_41M3A3JTH70GP1J92SCMA6VKBT
run-pickup-stall · maxRetries=0 disables retries (python) · at 16:22:40Z · abandoned wrun_41M3A3KAB10GNMPHCN9EA3HE06
run-pickup-stall · FatalError can be caught and detected with FatalError.is() (python) · at 16:22:58Z · abandoned wrun_41M3A3KW3Z0GVXPKRM95CD5RHJ
run-pickup-stall · step throw round-trips FatalError with cause chain to workflow catch (python) · at 16:22:59Z · abandoned wrun_41M3A3KXEB0GNN456B1D4Z0SMW
run-pickup-stall · workflow throw round-trips FatalError + cause through run_failed event (python) · at 16:23:03Z · abandoned wrun_41M3A3M14F0GTM6C2EQC5RCMB1
run-pickup-stall · StepNotRegisteredError fails the step but workflow can catch it (python) · at 16:23:24Z · abandoned wrun_41M3A3MN480GPVJM3E95JSM8RE
run-pickup-stall · StepNotRegisteredError fails the run when not caught in workflow (python) · at 16:23:42Z · abandoned wrun_41M3A3N4Y10GJ60QF2PC3JS0KE
run-pickup-stall · promiseRaceStressTestWorkflow (python) · at 16:25:03Z · abandoned wrun_41M3A3PYV80GXDAQ29B5NC88FC
run-pickup-stall · regular Error retries until success (python) · at 16:25:05Z · abandoned wrun_41M3A3PZH10GQ52Z7MDXYQK9BS
run-pickup-stall · writableForwardedFromWorkflowWorkflow (python) · at 16:25:06Z · abandoned wrun_41M3A3Q0PZ0GTAYT8S2654YPGE
run-pickup-stall · writableForwardedFromStepWorkflow (python) · at 16:25:13Z · abandoned wrun_41M3A3QAE80GR587YS5M2W7V81
run-pickup-stall · hookCleanupTestWorkflow - hook token reuse after workflow completion (python) · at 16:25:39Z · abandoned wrun_41M3A3QK1B0GJPH180DHRVDPXC
run-pickup-stall · FatalError fails immediately without retries (python) · at 16:26:15Z · abandoned wrun_41M3A3RT410GR7J7AGBCH3D00R
run-pickup-stall · RetryableError respects custom retryAfter delay (python) · at 16:26:26Z · abandoned wrun_41M3A3SDMC0GYKT3PV33435FPT
run-pickup-stall · maxRetries=0 disables retries (python) · at 16:26:30Z · abandoned wrun_41M3A3SPQR0GMW4D6CFE5HWN7Y
run-pickup-stall · FatalError can be caught and detected with FatalError.is() (python) · at 16:26:47Z · abandoned wrun_41M3A3TNX00GKP1EXSF5VCBNM7
run-pickup-stall · step throw round-trips FatalError with cause chain to workflow catch (python) · at 16:26:53Z · abandoned wrun_41M3A3TZF90GXJ206XTQ93GXAR
run-pickup-stall · workflow throw round-trips FatalError + cause through run_failed event (python) · at 16:26:53Z · abandoned wrun_41M3A3TZM70GN7S2CE436XV4YJ
run-pickup-stall · StepNotRegisteredError fails the step but workflow can catch it (python) · at 16:27:02Z · abandoned wrun_41M3A3VAER0GP9VQE8RSRQGJSE
run-pickup-stall · StepNotRegisteredError fails the run when not caught in workflow (python) · at 16:27:10Z · abandoned wrun_41M3A3VJXY0GGDAA3HYZX487H4
run-pickup-stall · hookCleanupTestWorkflow - hook token reuse after workflow completion (python) · at 16:27:51Z · abandoned wrun_41M3A3WT290GX7TQJS593F1CTF
run-pickup-stall · hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload (python) · at 16:27:52Z · abandoned wrun_41M3A3WTZF0GN317SE07WDRBS4
run-pickup-stall · 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution (python) · at 16:28:03Z · abandoned wrun_41M3A3X5RD0GSGRYG38D2Y1STV
run-pickup-stall · 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution (python) · at 16:28:14Z · abandoned wrun_41M3A3XH0M0GM86S2P3Z9TQ71Z
run-pickup-stall · hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps (python) · at 16:28:38Z · abandoned wrun_41M3A3Y8EQ0GYKYDERAY6TR4A5
run-pickup-stall · hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered (python) · at 16:28:44Z · abandoned wrun_41M3A3YEJ30GMTRP2XCASQMV50
run-pickup-stall · hookGetConflictWorkflow - awaiting hook.getConflict() registers hook without payload (python) · at 16:28:52Z · abandoned wrun_41M3A3YPDR0GMR1042SS2RDRQY
run-pickup-stall · 'hookGetConflictWithPriorStepWorkflow' - hook.getConflict() does not block step execution (python) · at 16:29:05Z · abandoned wrun_41M3A3Z13M0GH7HZ5TBB75ZM89
run-pickup-stall · 'hookGetConflictWithParallelStepWorkfl…' - hook.getConflict() does not block step execution (python) · at 16:29:15Z · abandoned wrun_41M3A3ZCD80GMMD94HE7GQ9DQT
run-pickup-stall · hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered (python) · at 16:29:32Z · abandoned wrun_41M3A3ZWX40GXJN11PKW64YQNF
run-pickup-stall · hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data (python) · at 16:29:53Z · abandoned wrun_41M3A40HSC0GH8TFV3SGPTG0N1
run-pickup-stall · hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (python) · at 16:30:04Z · abandoned wrun_41M3A40WEA0GR4AZT14T0CAW6Z
run-pickup-stall · hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps (python) · at 16:30:09Z · abandoned wrun_41M3A4113Q0GGMAD4R740ZVY5N
run-pickup-stall · hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook (python) · at 16:30:16Z · abandoned wrun_41M3A417X90GGWMHDS2VJ8G8SS
run-pickup-stall · resume-or-start route pattern - resumeHook retried after start() reaches the new run (python) · at 16:30:19Z · abandoned wrun_41M3A41B6Y0GGK55BY5Z82CYVH
run-pickup-stall · hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data (python) · at 16:30:40Z · abandoned wrun_41M3A4201T0GXRH3DBTT4ZWTGJ
run-pickup-stall · hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (python) · at 16:30:51Z · abandoned wrun_41M3A42AK60GTF2Z9X16DKKBB7
run-pickup-stall · hookSignalOwnerWorkflow - duplicate forwards its payload to the owner via resumeHook (python) · at 16:31:03Z · abandoned wrun_41M3A42P3B0GJDY4075CQ0W5WH
run-pickup-stall · resume-or-start route pattern - resumeHook retried after start() reaches the new run (python) · at 16:31:06Z · abandoned wrun_41M3A42SEM0GJMC7R7NZSQSYR5
run-pickup-stall · hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running (python) · at 16:31:32Z · abandoned wrun_41M3A43HWM0GHPA8VY4V754NJ1
run-pickup-stall · hookTokenReuseLoopWorkflow - same run recreates a hook with the same token after dispose() (python) · at 16:31:39Z · abandoned wrun_41M3A43RN00GTBCFA335VDWD4Z
run-pickup-stall · spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step (python) · at 16:31:40Z · abandoned wrun_41M3A43SWM0GQQQP6YWMBTR3NN
run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 16:31:54Z · abandoned wrun_41M3A447G20GSMPKM07TH6N358
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 16:31:57Z · abandoned wrun_41M3A44AT40GT8WVW4B54D9T1E
run-pickup-stall · hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running (python) · at 16:32:19Z · abandoned wrun_41M3A44ZWY0GZWV4VRQGT5N5W2
run-pickup-stall · hookTokenReuseLoopWorkflow - same run recreates a hook with the same token after dispose() (python) · at 16:32:26Z · abandoned wrun_41M3A4571P0GM2S7MKFH02C00H
run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 16:32:26Z · abandoned wrun_41M3A457FB0GGSCBTYZSF6W9A2
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 16:32:29Z · abandoned wrun_41M3A45A0W0GY6Y5B0FWKVWZD3
run-pickup-stall · hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep (python) · at 16:32:59Z · abandoned wrun_41M3A466YS0GXBGXZB4WHE7M5Y
run-pickup-stall · hookWithSleepFinalStepWorkflow - step only on final payload (python) · at 16:33:02Z · abandoned wrun_41M3A469TN0GPR6JN8KEGW5Z84
run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 16:33:06Z · abandoned wrun_41M3A46DW80GRFS0F6P83NBQ51
run-pickup-stall · sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) (python) · at 16:33:13Z · abandoned wrun_41M3A46MYR0GQEFATJEVV6MTES
run-pickup-stall · spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step (python) · at 16:33:41Z · abandoned wrun_41M3A47FTV0GYFKV4332KJ2VNG
run-pickup-stall · hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep (python) · at 16:33:46Z · abandoned wrun_41M3A47MYA0GTPZD856KWKG48R
run-pickup-stall · hookWithSleepFinalStepWorkflow - step only on final payload (python) · at 16:33:49Z · abandoned wrun_41M3A47QX00GTC08DDPRFVFSR2
run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 16:34:07Z · abandoned wrun_41M3A4899T0GRBHPCHE2F6RECR
run-pickup-stall · sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control) (python) · at 16:34:15Z · abandoned wrun_41M3A48GST0GVXN5DA673SSMSC
run-pickup-stall · abortTimeoutWorkflow: timeout cancels long-running step (python) · at 16:34:39Z · abandoned wrun_41M3A495050GGY818F8NE28EY5
run-pickup-stall · abortParallelWorkflow: abort cancels all parallel steps (python) · at 16:34:40Z · abandoned wrun_41M3A495TR0GH3BJQ4Q4CFP9YB
run-pickup-stall · abortReasonWorkflow: abort reason preserved across boundaries (python) · at 16:35:35Z · abandoned wrun_41M3A4A3WT0GTBDK48N023BYDN
run-pickup-stall · abortViaHookWorkflow: external hook triggers abort on in-flight step (python) · at 16:36:21Z · abandoned wrun_41M3A4B0DS0GRT5B46N7BQQSX9
run-pickup-stall · metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (Vercel World Regression: getWorkflowMetadata() fully breaking runs #1577) (python) · at 16:36:30Z · abandoned wrun_41M3A4BVRH0GXS864WC7JC5NND
run-pickup-stall · abortTimeoutWorkflow: timeout cancels long-running step (python) · at 16:36:45Z · abandoned wrun_41M3A4CF800GYFV58D5J9CTAJA
run-pickup-stall · abortParallelWorkflow: abort cancels all parallel steps (python) · at 16:36:46Z · abandoned wrun_41M3A4CV4M0GSY1R3BN2BM0MS4
run-pickup-stall · abortReasonWorkflow: abort reason preserved across boundaries (python) · at 16:37:01Z · abandoned wrun_41M3A4DGP50GYS32CK65V3VN8X
run-pickup-stall · start: initial attributes are seeded on run creation (python) · at 16:37:05Z · abandoned wrun_41M3A4DPBJ0GTDFN4ZZ7DPGHDG
run-pickup-stall · start: reserved-prefix initial attributes are seeded with allowReservedAttributes (python) · at 16:37:06Z · abandoned wrun_41M3A4DR6H0GXR9FAEEN83D6D3
run-pickup-stall · setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly (python) · at 16:37:24Z · abandoned wrun_41M3A4E9V00GYCSJ25P0VZ7YY8
run-pickup-stall · setAttributesInsideStepWorkflow: step-body calls append attributed native events (python) · at 16:37:34Z · abandoned wrun_41M3A4EKN20GT8N6TQRMM4CAJB
run-pickup-stall · abortViaHookWorkflow: external hook triggers abort on in-flight step (python) · at 16:37:36Z · abandoned wrun_41M3A4ENG20GWPV8RF6EDR4AEP
run-pickup-stall · Promise.all of disjoint-key writes: every key lands (python) · at 16:37:39Z · abandoned wrun_41M3A4ERYX0GZ650A7MB114KEE
run-pickup-stall · metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (Vercel World Regression: getWorkflowMetadata() fully breaking runs #1577) (python) · at 16:37:55Z · abandoned wrun_41M3A4F7VJ0GVW4RW6A8F633S3
run-pickup-stall · start: initial attributes are seeded on run creation (python) · at 16:38:04Z · abandoned wrun_41M3A4FGYH0GVKC3AR36034D8M
run-pickup-stall · start: reserved-prefix initial attributes are seeded with allowReservedAttributes (python) · at 16:38:09Z · abandoned wrun_41M3A4FP8D0GZ0G6KJBRHTWMFW
run-pickup-stall · setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly (python) · at 16:38:13Z · abandoned wrun_41M3A4FST50GGJW9J22J0MY2WF
run-pickup-stall · setAttributesInsideStepWorkflow: step-body calls append attributed native events (python) · at 16:38:22Z · abandoned wrun_41M3A4G30C0GGKDFRWKCD32J1A
run-pickup-stall · Promise.all of disjoint-key writes: every key lands (python) · at 16:38:34Z · abandoned wrun_41M3A4GE820GTQE0TC9EMAFXG7
run-pickup-stall · workflow throws after awaited setAttributes: attribute still persists on the failed run (python) · at 16:38:42Z · abandoned wrun_41M3A4GP6H0GKKZK1D5G1YQKC5
run-pickup-stall · workflow throws after awaited setAttributes: attribute still persists on the failed run (python) · at 16:39:13Z · abandoned wrun_41M3A4HM8T0GPGT4645FRCP2VK

E2E Test Summary

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	3816	62	739	4617
✅ 💻 Local Development	4238	0	550	4788
✅ 📦 Local Production	4238	0	550	4788
✅ 🐘 Local Postgres	4238	0	550	4788
✅ 🪟 Windows	340	0	2	342
✅ vercel-http-transport	873	0	153	1026
✅ vercel-multi-region	27	0	0	27
✅ vercel-ws-transport	591	0	93	684
Total	18361	62	2637	21060

Details by Category

❌ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro-node	141	0	30
✅ astro-quickjs	141	0	30
✅ example-node	141	0	30
✅ example-quickjs	141	0	30
✅ express-node	141	0	30
✅ express-quickjs	141	0	30
✅ fastify-node	141	0	30
✅ fastify-quickjs	141	0	30
✅ hono-node	141	0	30
✅ hono-quickjs	141	0	30
✅ nest-node	141	0	30
✅ nest-quickjs	141	0	30
✅ nextjs-turbopack-node	168	0	3
✅ nextjs-turbopack-quickjs	168	0	3
✅ nextjs-webpack-node	168	0	3
✅ nextjs-webpack-quickjs	168	0	3
✅ nitro-node	141	0	30
✅ nitro-quickjs	141	0	30
✅ nuxt-node	141	0	30
✅ nuxt-quickjs	141	0	30
❌ python-node	4	62	105
✅ sveltekit-node	160	0	11
✅ sveltekit-quickjs	160	0	11
✅ tanstack-start-node	141	0	30
✅ tanstack-start-quickjs	141	0	30
✅ vite-node	141	0	30
✅ vite-quickjs	141	0	30

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable-node	142	29
✅ astro-stable-quickjs	142	29
✅ express-stable-node	142	29
✅ express-stable-quickjs	142	29
✅ fastify-stable-node	142	29
✅ fastify-stable-quickjs	142	29
✅ hono-stable-node	142	29
✅ hono-stable-quickjs	142	29
✅ nest-stable-node	142	29
✅ nest-stable-quickjs	142	29
✅ nextjs-turbopack-canary-node	170	1
✅ nextjs-turbopack-canary-quickjs	170	1
✅ nextjs-turbopack-stable-node	170	1
✅ nextjs-turbopack-stable-quickjs	170	1
✅ nextjs-webpack-canary-node	170	1
✅ nextjs-webpack-canary-quickjs	170	1
✅ nextjs-webpack-stable-node	170	1
✅ nextjs-webpack-stable-quickjs	170	1
✅ nitro-stable-node	142	29
✅ nitro-stable-quickjs	142	29
✅ nuxt-stable-node	142	29
✅ nuxt-stable-quickjs	142	29
✅ sveltekit-stable-node	161	10
✅ sveltekit-stable-quickjs	161	10
✅ tanstack-start-node	142	29
✅ tanstack-start-quickjs	142	29
✅ vite-stable-node	142	29
✅ vite-stable-quickjs	142	29

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable-node	142	29
✅ astro-stable-quickjs	142	29
✅ express-stable-node	142	29
✅ express-stable-quickjs	142	29
✅ fastify-stable-node	142	29
✅ fastify-stable-quickjs	142	29
✅ hono-stable-node	142	29
✅ hono-stable-quickjs	142	29
✅ nest-stable-node	142	29
✅ nest-stable-quickjs	142	29
✅ nextjs-turbopack-canary-node	170	1
✅ nextjs-turbopack-canary-quickjs	170	1
✅ nextjs-turbopack-stable-node	170	1
✅ nextjs-turbopack-stable-quickjs	170	1
✅ nextjs-webpack-canary-node	170	1
✅ nextjs-webpack-canary-quickjs	170	1
✅ nextjs-webpack-stable-node	170	1
✅ nextjs-webpack-stable-quickjs	170	1
✅ nitro-stable-node	142	29
✅ nitro-stable-quickjs	142	29
✅ nuxt-stable-node	142	29
✅ nuxt-stable-quickjs	142	29
✅ sveltekit-stable-node	161	10
✅ sveltekit-stable-quickjs	161	10
✅ tanstack-start-node	142	29
✅ tanstack-start-quickjs	142	29
✅ vite-stable-node	142	29
✅ vite-stable-quickjs	142	29

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable-node	142	29
✅ astro-stable-quickjs	142	29
✅ express-stable-node	142	29
✅ express-stable-quickjs	142	29
✅ fastify-stable-node	142	29
✅ fastify-stable-quickjs	142	29
✅ hono-stable-node	142	29
✅ hono-stable-quickjs	142	29
✅ nest-stable-node	142	29
✅ nest-stable-quickjs	142	29
✅ nextjs-turbopack-canary-node	170	1
✅ nextjs-turbopack-canary-quickjs	170	1
✅ nextjs-turbopack-stable-node	170	1
✅ nextjs-turbopack-stable-quickjs	170	1
✅ nextjs-webpack-canary-node	170	1
✅ nextjs-webpack-canary-quickjs	170	1
✅ nextjs-webpack-stable-node	170	1
✅ nextjs-webpack-stable-quickjs	170	1
✅ nitro-stable-node	142	29
✅ nitro-stable-quickjs	142	29
✅ nuxt-stable-node	142	29
✅ nuxt-stable-quickjs	142	29
✅ sveltekit-stable-node	161	10
✅ sveltekit-stable-quickjs	161	10
✅ tanstack-start-node	142	29
✅ tanstack-start-quickjs	142	29
✅ vite-stable-node	142	29
✅ vite-stable-quickjs	142	29

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	170	0	1
✅ nextjs-turbopack-quickjs	170	0	1

✅ vercel-http-transport

App	Passed	Skipped
✅ example	141	30
✅ express	141	30
✅ hono	141	30
✅ nextjs-turbopack	168	3
✅ nitro	141	30
✅ vite	141	30

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

✅ vercel-ws-transport

App	Passed	Skipped
✅ example	141	30
✅ express	141	30
✅ nextjs-turbopack	168	3
✅ vite	141	30

📋 View full workflow run

github-actions · 2026-09-24T16:10:41Z

📊 Workflow Benchmarks

commit d3cb2dd · Thu, 24 Sep 2026 16:35:34 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	250 (-85%) 💚	2251 🔴 (+14%)	2808 🔴 (+39%) 🔻	3017 🔴 (+27%) 🔻	30
TTFS	stream	200 (+30%) 🔻	2217 🔴 (+18%) 🔻	2250 🔴 (+17%) 🔻	2915 🔴 (+46%) 🔻	30
TTFS	hook + stream	2413 (+48%) 🔻	2620 🔴 (+15%) 🔻	2679 🔴 (+13%)	6290 🔴 (+129%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	541 (+28%) 🔻	709 (+27%) 🔻	2711 (+364%) 🔻	3670 (+64%) 🔻	10
Fan-out TTLS	Promise.all(100 steps)	1965 (+42%) 🔻	5785 (+39%) 🔻	8669 (+64%) 🔻	10203 (+22%) 🔻	10
STSO	1020 steps (inline)	136 (+37%) 🔻	163 (+13%)	183 (+13%)	259 (+2.8%)	1019
WO	1020 steps	164020 (+12%)	164020 (+12%)	164020 (+12%)	164020 (+12%)	1
CRTT	first chunk (pooled)	81 (+37%) 🔻	111 (+4.7%)	123 (-31%) 💚	182 (-43%) 💚	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	103 (+3%)	159 (-15%)	238 (-10%)	573 (+2%)	120 (-20%)	10
size sweep (100/s, 160B-12KB)	107 (+13%)	172 (-13%)	271 (-31%)	2611 (+338%)	167 (-34%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	96 (-1%)	139 (-13%)	171 (-27%)	336 (-65%)	191 (-48%)	3
replay eve-gpt-5.6-sol-2000t (1x)	101 (+20%)	143 (-28%)	183 (-40%)	863 (±0%)	417 (-16%)	2
replay eve-gpt-5.6-sol-2000t (2x)	98 (-3%)	182 (-57%)	263 (-60%)	636 (-27%)	401 (-13%)	3

📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 145702ms → this run 163804ms (Δ +18102ms, +12%)

 50-100 ms  ┃                         main   1  this   0    -1
100-150 ms  ████████┃███████████████  main 811  this 311  -500
150-200 ms  █████░░░░░░░░░░░░░░┃      main 175  this 659  +484
200-250 ms  ┃                         main  21  this  38   +17
250-300 ms  ┃                         main   8  this   4    -4
300-350 ms  ┃                         main   1  this   1    +0
350-400 ms  ┃                         main   1  this   4    +3
400-450 ms  ┃                         main   0  this   2    +2
500-550 ms  ┃                         main   1  this   0    -1

📈 CRTT drill-down vs main (RTT distributions & profiles)

variant  RTT 1ms→5s+             avg         p50         p90           p99     n
control  ······▂█▁▁···   139.9 (-1%)   128 (+2%)  238 (-10%)     573 (+2%)  3000
sweep    ······▂█▂▁▁▁·  256.5 (+66%)   128 (-4%)  271 (-31%)  2611 (+338%)  3000
gw 1x    ·····▁▄█▁····  122.7 (-16%)   117 (-4%)  171 (-27%)    336 (-65%)  5295
eve 1x   ·····▁▄█▁▁▁··  132.9 (-13%)   115 (±0%)  183 (-40%)     863 (±0%)  5186
eve 2x   ·····▁▂█▂▁···    162 (-35%)  139 (-19%)  263 (-60%)    636 (-27%)  7779

RTT over stream progress (avg per tenth of stream, bars scaled min→max):

control  ▆▄▄▄▄▂▄█▃▁  120–167ms
sweep    ▁▅█▇▆▅▄▃▃▂  150–364ms
gw 1x    ▄█▆▄▅▂▄▁▄▁  114–134ms
eve 1x   ▁▂▁▁▁▁█▃▂▂  114–220ms
eve 2x   ▄▁▂▁▁▄▃█▄▅  123–241ms

RTT by chunk size (avg per log size bin, ~160B → ~12KB serialized, bars scaled min→max):

sweep  ▇█▆▂▁▁▄  254–259ms

Delivery jitter over stream progress (avg positive CDV per tenth of stream, bars scaled min→max):

control  ▅▂▁▂▃▃▄█▁▁  37–54ms
sweep    ▁█▁▁▂▂▂▁▂▁  53–123ms
gw 1x    ▃█▄▁▄▃▄▄▃▂  35–44ms
eve 1x   ▂▆▁▃▄▅█▆▆▅  20–28ms
eve 2x   ▄▄▁▂▃▃▃▂▃█  21–34ms

ℹ️ Metric definitions & methodology

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

_{The collapsed STSO distribution section above buckets every step gap, split inline (same warm process — pure framework overhead) vs queue-hop (fresh process — dispatch, reinit, replay). █ = main, ┃ = this run, ░ = fill.}

_{The collapsed CRTT drill-down: per-variant RTT histograms (fixed log bins, · = empty) and mean RTT/positive-CDV profile lines over stream progress and chunk size. Histograms, avgs, and profiles merge exactly across runs; p50–p99 are percentile-of-percentiles. Per-index rows live in the artifacts.}

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

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

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

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

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

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

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

github-actions · 2026-09-24T16:11:12Z

Sim World

Simulated world deterministic testing for races. Traces

🟠 world-sim scenario book — 1 fail of 42 total

fence=per-spec

scenario	outcome	events	virt	replay
✅ `smoke-no-steps`	completed	3	0ms	ok
✅ `smoke-one-step`	completed	6	0ms	ok
✅ `hook-at-step-started`	completed	12	0ms	ok
✅ `hook-at-step-completed`	completed	12	0ms	ok
✅ `hook-at-hook-created`	completed	12	0ms	ok
✅ `deadline-hook-wins`	completed	7	1.0h	ok
✅ `deadline-expires`	completed	7	1.0h	ok
✅ `step-vs-timer-early-settlement`	completed	8	1.0h	ok
✅ `long-sleep`	completed	11	30.0d	ok
✅ `hook-never-arrives`	stalled	3	0ms	skipped
✅ `step-retries-twice`	completed	10	2.0s	ok
✅ `parallel-steps`	completed	9	0ms	ok
✅ `hook-on-execution-state`	completed	12	0ms	ok
✅ `peek-hook-before-branch`	completed	12	0ms	ok
✅ `peek-hook-after-branch`	completed	12	0ms	ok
✅ `peek-hook-at-registration`	completed	12	0ms	ok
✅ `race-hook-before-probe`	completed	12	0ms	ok
✅ `race-hook-after-probe`	completed	12	0ms	ok
✅ `race-duplicate-delivery`	completed	13	0ms	ok
✅ `attr-hook-before-step`	completed	11	0ms	ok
✅ `attr-hook-after-step`	completed	11	0ms	ok
✅ `attr-from-step-body`	completed	13	0ms	ok
✅ `fork-hook-after-timeout`	completed	14	1.0m	ok
✅ `fork-hook-before-timeout`	completed	14	1.0m	ok
✅ `count-hook-after-timeout`	completed	17	1.0m	ok
✅ `count-hook-before-timeout`	completed	20	1.0m	ok
✅ `stale-read-step-count-fork`	completed	20	1.0m	ok
✅ `stale-read-equal-step-counts`	completed	14	1.0m	ok
✅ `step-vs-step-fork`	completed	12	0ms	ok
✅ `step-vs-step-fork-fenced`	completed	12	0ms	ok
✅ `fence-catches-benign-direction`	completed	12	5ms	ok
✅ `in-flight-before-decision`	completed	17	1.0m	ok
❌ `in-flight-before-decision-counted`	completed	17	1.0m	ok
✅ `in-flight-after-decision`	completed	19	2.0m	ok
✅ `stale-read-step-count-fork-fenced`	completed	20	1.0m	ok
✅ `fork-hook-wins`	completed	13	1.0m	ok
✅ `fork-timeout-wins`	completed	13	1.0m	ok
✅ `unclaimed-payload-under-fork`	completed	17	1.0m	ok
✅ `claimed-payload-under-fork`	completed	17	1.0m	ok
✅ `writers-independent-step-bodies`	completed	12	0ms	ok
✅ `writers-scripted-tempo`	completed	12	0ms	ok
✅ `cancel-mid-step`	cancelled	7	0ms	skipped

Full trace: world-sim.txt

github-actions · 2026-09-24T16:12:16Z

Framework	Flow route	Step reg.	Framework output
hono	252.0 KiB (±0)	94.9 KiB (±0)	1.91 MiB (±0)
nextjs-turbopack	259.3 KiB (±0)	426 B (±0)	907.5 KiB (±0)

About these numbers

Sizes are gzip; parentheses show the change against main.
Flow route and Step reg. gate this job, on raw bytes rather than the gzip shown, at max(2%, 50.0 KiB). Framework output is informational.

d3cb2dd · run

github-actions · 2026-09-30T16:16:33Z

No backport to stable for e1fe4f0 (AI decision).

This is main-only release plumbing: it exits changesets pre-release mode to arm the v5 GA publish, adds @workflow/world-vercel to the 5.x fixed-version group, and updates AGENTS.md release docs. None of it applies to the 4.x maintenance line — stable has no .changeset/pre.json and no scripts/check-published.mjs, and the release.yml change makes the --latest marker conditional on main, which only affects main's releases. Cherry-picking it would corrupt stable's changeset configuration rather than fix anything.

To override, re-run the Backport to stable workflow manually via workflow_dispatch and paste this commit SHA into the ref input:

e1fe4f0e81b6074047f8e1307e735526b597cea1

Revert "Revert "[release] Exit changeset pre mode for v5, tie core an…

d3cb2dd

…d world-vercel versions together" (#3090) (#4195)" This reverts commit 413ada5.

VaguelySerious mentioned this pull request Sep 24, 2026

Re-apply "Publish 4.x under the previous dist-tag" (#4177) #4363

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VaguelySerious marked this pull request as ready for review September 29, 2026 18:06

VaguelySerious requested a review from a team as a code owner September 29, 2026 18:06

VaguelySerious mentioned this pull request Sep 29, 2026

[docs] Make v5 the default documentation version #4498

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alangenfeld approved these changes Sep 30, 2026

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VaguelySerious merged commit e1fe4f0 into main Sep 30, 2026
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VaguelySerious deleted the peter/reapply-3090-exit-pre-mode branch September 30, 2026 16:15

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Re-apply "[release] Exit changeset pre mode for v5, tie core and world-vercel versions together" (#3090) - #4362

Re-apply "[release] Exit changeset pre mode for v5, tie core and world-vercel versions together" (#3090)#4362
VaguelySerious merged 1 commit into
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peter/reapply-3090-exit-pre-mode

VaguelySerious commented Sep 24, 2026

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VaguelySerious commented Sep 24, 2026

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changeset-bot Bot commented Sep 24, 2026

🦋 Changeset detected

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🧪 E2E Test Results

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📊 Workflow Benchmarks

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github-actions Bot commented Sep 24, 2026

Sim World

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