Default the events transport to WebSockets by shalabhc · Pull Request #3702 · vercel/workflow

shalabhc · 2026-08-20T22:45:48Z

Flip websockets to default on. It can be disabled by setting WORKFLOW_EVENTS_TRANSPORT=http

Known issues

Having the proxy enabled means websockets is silently turned off.
The WS e2e lanes do not assert the transport was used.

Tests

All existing e2e tests will now test websockets on by default.

This leaves a large gap for http coverage while we we want to keep a safe fallback. I'm adding a separate set of parallel tests to tests all e2e for http - separate PR.

WORKFLOW_EVENTS_TRANSPORT=http is the opt-out. Only that exact value disables it, so a typo'd or empty value fails toward the default rather than quietly pinning a deployment to HTTP. The prerequisite the gate named for defaulting on is met: postEventFrameOverWs opens a client span per frame. What is still missing is Vercel's outgoing-requests view, which reads instrumented fetch calls rather than spans and so cannot show a transport that issues no request. Co-Authored-By: opencode <opencode@vercel.com>

changeset-bot · 2026-08-20T22:46:00Z

🦋 Changeset detected

Latest commit: a8726db

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

This PR includes changesets to release 17 packages

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

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

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

vercel · 2026-08-20T22:46:01Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview	Aug 20, 2026 11:53pm
example-nextjs-workflow-webpack	Ready	Preview	Aug 20, 2026 11:53pm
example-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-astro-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-express-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-fastify-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-hono-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-nestjs-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-nitro-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-nuxt-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-python-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-sveltekit-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-tanstack-start-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workbench-vite-workflow	Ready	Preview	Aug 20, 2026 11:53pm
workflow-docs	Ready	Preview, v0	Aug 20, 2026 11:53pm
workflow-swc-playground	Ready	Preview	Aug 20, 2026 11:53pm
workflow-tarballs	Ready	Preview	Aug 20, 2026 11:53pm
workflow-web	Ready	Preview	Aug 20, 2026 11:53pm

github-actions · 2026-08-20T22:46:12Z

🧪 E2E Test Results

❌ Some tests failed

❌ Failed E2E Tests

▲ Vercel Production (171 failed)

astro-node (3 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes Promise.all of disjoint-key writes: every key lands

astro-quickjs (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 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

example-node (4 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes fire-and-forget: void setAttributes lands without awaiting

example-quickjs (8 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

express-node (3 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes

express-quickjs (9 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

fastify-node (5 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes fire-and-forget: void setAttributes lands without awaiting

fastify-quickjs (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

hono-node (2 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability

hono-quickjs (8 failed):

concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 observability
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

nest-node (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting

nest-quickjs (6 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

nextjs-turbopack-node (2 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability

nextjs-turbopack-quickjs (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting

nextjs-webpack-node (5 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 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

nextjs-webpack-quickjs (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

nitro-node (5 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes

nitro-quickjs (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

nuxt-node (6 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

nuxt-quickjs (9 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

sveltekit-node (5 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting

sveltekit-quickjs (9 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

tanstack-start-node (4 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands

tanstack-start-quickjs (10 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0GSRBK50GVKS7FMV1CY1M8R | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
setAttributes fire-and-forget: void setAttributes lands without awaiting
setAttributes Promise.all of disjoint-key writes: every key lands
setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

vite-node (7 failed):

hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0GSS35B0GM3T0HKX3DXF7Z9 | 🔍 observability
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 observability
setAttributes start: initial attributes are seeded on run creation
setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
setAttributes fire-and-forget: void setAttributes lands without awaiting

vite-quickjs (7 failed):

hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0GST7A30GQEBNGHM9W6JKFW | 🔍 observability
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0GSTC1M0GNS3HBGX79CNQ8A | 🔍 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

⚠️ 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.

24 flaky tests

addTenWorkflow (express)
addTenWorkflow (nitro)
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously (astro)
concurrent hook token conflict - two workflows cannot use the same hook token simultaneously (fastify)
fire-and-forget: void setAttributes lands without awaiting (nextjs-webpack)
fire-and-forget: void setAttributes lands without awaiting (nitro)
hookCleanupTestWorkflow - hook token reuse after workflow completion (hono)
hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered (tanstack-start)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (astro)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (example)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (nextjs-turbopack)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (nextjs-webpack)
hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (tanstack-start)
Promise.all of disjoint-key writes: every key lands (example)
Promise.all of disjoint-key writes: every key lands (nitro)
setAttributesInsideStepWorkflow: step-body calls append attributed native events (example)
setAttributesInsideStepWorkflow: step-body calls append attributed native events (nextjs-webpack)
setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly (astro)
setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly (nextjs-turbopack)
sleepWinsRaceWorkflow (vite)
start: initial attributes are seeded on run creation (hono)
start: reserved-prefix initial attributes are seeded with allowReservedAttributes (example)
validation DX: invalid writes throw catchable FatalErrors naming rule and limit (example)
workflow throws after awaited setAttributes: attribute still persists on the failed run (tanstack-start)

🛠 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.

cold-start-warmup · suite warmup (tanstack-start) · at 23:55:00Z · abandoned wrun_01M0GSJ24W06RJ478WRZ45G278

E2E Test Summary

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	3407	171	742	4320
✅ 💻 Local Development	3922	0	558	4480
✅ 📦 Local Production	3922	0	558	4480
✅ 🐘 Local Postgres	3922	0	558	4480
✅ 🪟 Windows	320	0	0	320
✅ 🌐 Cross-language Conformance	9	0	132	141
✅ vercel-multi-region	27	0	0	27
Total	15529	171	2548	18248

Details by Category

❌ ▲ Vercel Production

App	Passed	Failed	Skipped
❌ astro-node	129	3	28
❌ astro-quickjs	122	10	28
❌ example-node	128	4	28
❌ example-quickjs	124	8	28
❌ express-node	129	3	28
❌ express-quickjs	123	9	28
❌ fastify-node	127	5	28
❌ fastify-quickjs	122	10	28
❌ hono-node	130	2	28
❌ hono-quickjs	124	8	28
❌ nest-node	125	7	28
❌ nest-quickjs	126	6	28
❌ nextjs-turbopack-node	155	2	3
❌ nextjs-turbopack-quickjs	150	7	3
❌ nextjs-webpack-node	152	5	3
❌ nextjs-webpack-quickjs	147	10	3
❌ nitro-node	127	5	28
❌ nitro-quickjs	122	10	28
❌ nuxt-node	126	6	28
❌ nuxt-quickjs	123	9	28
✅ python-node	8	0	152
❌ sveltekit-node	146	5	9
❌ sveltekit-quickjs	142	9	9
❌ tanstack-start-node	128	4	28
❌ tanstack-start-quickjs	122	10	28
❌ vite-node	125	7	28
❌ vite-quickjs	125	7	28

✅ 💻 Local Development

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

✅ 📦 Local Production

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

✅ 🐘 Local Postgres

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

✅ 🪟 Windows

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

✅ 🌐 Cross-language Conformance

App	Passed	Failed	Skipped
✅ python	9	0	132

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

📋 View full workflow run

github-actions · 2026-08-20T22:46:16Z

📊 Workflow Benchmarks

❌ The benchmark run for a8726db failed. See the run logs for details.

No benchmark results were produced.

ℹ️ Metric definitions & methodology

_{Metrics —}

_{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.}

vercel

Additional Suggestions:

Docs state WORKFLOW_EVENTS_TRANSPORT default is http, but the code now defaults to WebSocket unless the value is exactly http.

isWsEventsTransportEnabled unit tests still assert the old opt-in defaults, so they fail after the transport default flipped to WS (!== 'http').

github-actions · 2026-08-20T22:49:02Z

Sim World

Simulated world deterministic testing for races. Traces

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

fence=per-spec

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

Full trace: world-sim.txt

Three places still documented http as the default. Each now states the opt-out is the exact value http, rather than leaving 'default: ws' to imply that anything non-ws disables it — the asymmetry is deliberate in the code and is the part a reader would otherwise get wrong. Also drops 'Experimental' from the Vercel World page: a setting that is on for everyone by default is not opt-in experimental, whatever else it is. Co-Authored-By: opencode <opencode@vercel.com>

Five tests in ws-transport.test.ts still encoded the opt-in semantics. Three were the isWsEventsTransportEnabled table itself; the other two (openWsChannel 'does nothing when the gate is off', and the channel release equivalent) relied on the suite's ambient unset environment meaning 'off', which it no longer does. Both now set http explicitly. Two tests in ws-transport-spans.test.ts asserted HTTP-side span behaviour the same way. The write one would have kept passing by falling through resolveWsTransport's null rather than because the gate was off - passing for the wrong reason, which is what this file exists to catch. Also makes the opt-out case-insensitive and trimmed. The gate is deliberately asymmetric - unrecognized values take the default - but that asymmetry should not extend to swallowing HTTP or ' http '. Whoever reaches for the escape hatch is plausibly mid-incident, and silently ignoring their opt-out over a capital letter is the same class of silent-wrong-transport bug this flip is meant to stop shipping. 554 tests pass in packages/world-vercel. Co-Authored-By: opencode <opencode@vercel.com>

shalabhc · 2026-08-21T03:40:46Z

Both bot suggestions are fixed.

e2e failures look preexisting on main.

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ci: add a required forced-HTTP e2e lane #3703

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Default the events transport to WebSockets - #3702

Default the events transport to WebSockets#3702
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