[world] Deprecate runs.experimentalSetAttributes and remove the unused attributes bridge by pranaygp · Pull Request #5406 · vercel/workflow

pranaygp · 2026-11-13T02:33:06Z

Deprecates the optional World method runs.experimentalSetAttributes (and ExperimentalSetAttributesResult) instead of renaming it, and removes the __builtin_set_attributes step bridge, its only caller. Nothing in the current SDK can reach either: setAttributes() writes attr_set events through events.create.

Why

The method looked like part of the attributes API, and the World docs said run attributes depend on it. They don't. Since workflow 5.0.0-beta.15 (#2226), setAttributes() and start(..., { attributes }) write through the event log. The direct write survived only as a dead step and an optional interface member that new World authors were told to implement.

Reachability (why it is dead for the current SDK)

No dispatch: __builtin_set_attributes was referenced only by its own definition. The workflow-body path dispatches WORKFLOW_SET_ATTRIBUTES to createSetAttributes (core/src/workflow.ts:719-724), and the QuickJS / spec 9 engine does the same with a pending attribute op (core/src/runtime/quickjs-runtime.ts:1066). The step-body path calls events.create with attr_set (core/src/set-attributes.ts). Neither calls useStep('__builtin_set_attributes') or runs.experimentalSetAttributes.
MVP-era runs: the bridge was dispatched only by 5.0.0-beta.8 to beta.14. Those runs are spec 3 with ULID event IDs. A v5 runtime cannot replay them: its writes derive eventCount from the loaded log through maxEventSlot → requireEventSlot, which throws on a non-slot ID (core/src/runtime/helpers.ts:980-989, slotSnapshotParams at :1201, spec8/suspension-handler.ts:599). The upgrading-to-v5 callout already documents that pre-v5 runs must drain on their old build. Even if a replay got that far, the current VM writes attr_set where the log recorded a step_created, so it would not call the step.
Stale step messages: steps queued by those betas went to __wkf_step_* topics, which were retired in 5.0.0-beta.37 (Remove retired v1 step route plumbing #3061) and are not consumed by current Worlds. On Vercel, messages and runs stay on the deployment that created them.
Cross-deployment starts: a run executes on its target deployment's bundled SDK and World, so the current SDK's builtins are never involved.

Why the first-party implementations stay

Old SDKs can still call the method. workflow 5.0.0-beta.8 to beta.14 call runs.experimentalSetAttributes (the workflow-body bridge, and step bodies from beta.9). workflow → @workflow/core → world-local / world-vercel are exact pins (workspace:*), so the default pairing is always same-release. But world-postgres declares no peer dependency on workflow or @workflow/core, any World can be selected by package name through WORKFLOW_TARGET_WORLD, and those betas have no World spec-range check (core/src/runtime/world-compatibility.ts doesn't exist there). So a newer World package can be installed next to one of them. world-local, world-postgres and world-vercel are left unchanged, and the /v2/runs/:runId/attributes endpoint is untouched.

Changes

@workflow/world: runs.experimentalSetAttributes and ExperimentalSetAttributesResult are marked @deprecated. The JSDoc says the SDK no longer calls the method, attributes are attr_set / run_created events, new Worlds should not implement it, and which releases were the last callers.
workflow: removes __builtin_set_attributes and its test.
core: adds a test that a step-body setAttributes() writes attr_set and never calls runs.experimentalSetAttributes, even when the World has it.
Docs: building-a-world drops the method from the Storage interface and adds a short "Run attributes" rule (validate and materialize attr_set / run_created attributes atomically; reject attr_set on a terminal run). upgrading-to-v5 drops the row claiming attributes depend on the method.
packages/core/src/attributes-mvp.md records the retirement, and both migration skills (versions bumped) stop recommending the method.
Changesets: @workflow/world patch (deprecation), workflow patch (bridge removal).

Validation

tsc --noEmit passes in world, world-local, world-postgres, world-vercel, workflow, core.
Tests pass:
- world: 300
- world-local: 637
- world-vercel: 1194
- workflow: 10
- core attribute tests: 34
- world-postgres test/storage.test.ts: 183, against Postgres in Docker
Full core suite: 4594 passed (6 expected fail, 24 skipped).
Not run locally: world-testing and world-postgres's spec.test.ts (both need the Rust-built SWC plugin), the rest of the world-postgres suite (container-heavy), and e2e.

Keep experimentalSetAttributes as a deprecated optional alias on the World interface; callers prefer runs.setAttributes and fall back to the old name. Signed-off-by: Pranay Prakash <pranay.gp@gmail.com> Co-authored-by: vercel-v[bot] <353008837+vercel-v[bot]@users.noreply.github.com>

changeset-bot · 2026-11-13T02:33:11Z

🦋 Changeset detected

Latest commit: 611553b

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

This PR includes changesets to release 21 packages

Name	Type
@workflow/world	Patch
workflow	Patch
@workflow/cli	Patch
@workflow/core	Patch
@workflow/errors	Patch
@workflow/vitest	Patch
@workflow/web-shared	Patch
@workflow/web	Patch
@workflow/world-local	Patch
@workflow/world-postgres	Patch
@workflow/world-testing	Patch
@workflow/world-vercel	Patch
@workflow/builders	Patch
@workflow/next	Patch
@workflow/nitro	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 · 2026-11-13T02:33:11Z

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

Project	Deployment	Actions	Updated
example-nextjs-workflow-turbopack	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
example-nextjs-workflow-webpack	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
example-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-astro-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-express-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-fastify-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-hono-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-nestjs-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-nitro-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-nuxt-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-python-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-sveltekit-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-tanstack-start-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workbench-vite-workflow	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workflow-docs	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workflow-swc-playground	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workflow-tarballs	Ready	Preview, v0	Nov 13, 2026 3:08am UTC
workflow-web	Ready	Preview, v0	Nov 13, 2026 3:08am UTC

github-actions · 2026-11-13T02:33:24Z

📊 Workflow Benchmarks

commit 611553b · Fri, 13 Nov 2026 03:20:26 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	2085 (+53%) 🔻	2232 🔴 (+54%) 🔻	2271 🔴 (+49%) 🔻	2346 🔴 (+48%) 🔻	30
TTFS	stream	2085 (+127%) 🔻	2163 🔴 (+50%) 🔻	2193 🔴 (+50%) 🔻	2230 🔴 (+50%) 🔻	30
TTFS	hook + stream	2308 (+45%) 🔻	2436 🔴 (+43%) 🔻	2505 🔴 (+41%) 🔻	5278 🔴 (+181%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	476 (+42%) 🔻	918 (+16%) 🔻	2367 (+105%) 🔻	2434 (+23%) 🔻	10
Fan-out TTLS	Promise.all(100 steps)	2239 (+53%) 🔻	3112 (-21%) 💚	4106 (-12%)	8602 (+58%) 🔻	10
STSO	1020 steps (inline)	93 (-8.8%)	118 (-13%)	132 (-15%)	184 (-15%) 💚	1019
WO	1020 steps	119705 (-10%)	119705 (-10%)	119705 (-10%)	119705 (-10%)	1

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

1020 steps (inline)

Cumulative STSO time: main 133047ms → this run 117578ms (Δ -15469ms, -12%)

 50-100 ms  ┃                         main   0  this   4    +4
100-150 ms  ██████████████████████░┃  main 892  this 968   +76
150-200 ms  ┃██                       main 112  this  42   -70
200-250 ms  ┃                         main   9  this   3    -6
250-300 ms  ┃                         main   5  this   1    -4
300-350 ms  ┃                         main   0  this   1    +1
350-400 ms  ┃                         main   1  this   0    -1

📜 Previous results (1)

`c8254e6`

Fri, 13 Nov 2026 02:49:19 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	256 (+2.8%)	1829 🔴 (+26%) 🔻	2106 🔴 (+39%) 🔻	2147 🔴 (+13%)	30
TTFS	stream	235 (-1.3%)	1856 🔴 (+38%) 🔻	2071 🔴 (+51%) 🔻	2155 🔴 (+43%) 🔻	30
TTFS	hook + stream	392 (+13%)	1883 🔴 (+19%) 🔻	1963 🔴 (+18%) 🔻	2020 🔴 (+19%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	394 (+9.4%)	577 (-2.5%)	917 (+49%) 🔻	2548 (+49%) 🔻	10
Fan-out TTLS	Promise.all(100 steps)	1429 (+41%) 🔻	3565 (-12%)	3888 (-7.4%)	4075 (-41%) 💚	10
STSO	1020 steps (inline)	98 (+13%)	146 (+13%)	175 (+2.3%)	294 (-16%) 💚	1019
WO	1020 steps	141445 (+11%)	141445 (+11%)	141445 (+11%)	141445 (+11%)	1

ℹ️ Metric definitions & methodology

_{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.}

_{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)}

_{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}

_{🔴 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. Streaming delivery performance is measured in durabench.}

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

github-actions · 2026-11-13T02:33:26Z

🧪 E2E Test Results

✅ All tests passed

⚠️ 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.

fibonacciWorkflow - recursive workflow composition via start() (hono · vercel-prod / vercel / quickjs / production) — flaked in 2 jobs
distributedAbortController - manual abort triggers signal (unknown)
fibonacciWorkflow - recursive workflow composition via start() (vite · vercel-prod / vercel / node / production)
hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running (unknown)
instanceMethodStepWorkflow - instance methods with "use step" directive (unknown)
readableStreamWorkflow (nextjs-webpack · vercel-prod / vercel / quickjs / production)
resumes the owner immediately after admission, before the run has started (unknown)
with no retention, the token is released when the run ends (sveltekit · vercel-prod / vercel / quickjs / production)

🛠 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.

run-pickup-stall · runClassSerializationWorkflow - Run instances serialize across workflow/step boundaries (nitro) · at 03:10:24Z · abandoned wrun_41M79E4JMR0GV9SJEYR1RBCHRA
run-pickup-stall · a run can take over its own earlier hook (sveltekit) · at 03:10:25Z · abandoned wrun_41M79E4KMQ0GVP1HFBP2E86H4G
run-pickup-stall · StepNotRegisteredError fails the run when not caught in workflow (nextjs-turbopack) · at 03:10:57Z · abandoned wrun_41M79E5JMP0GMP4WBZ41P9PX9B
run-pickup-stall · runs app-generated source against a registered step (tanstack-start) · at 03:10:57Z · abandoned wrun_01M79E5MPC9S74786X97JS2C3D
run-pickup-stall · fires constructor + stream callbacks with the tool result (nextjs-turbopack) · at 03:10:59Z · abandoned wrun_41M79E5MBZ0GXJYGZH49FTBFNH
cold-start-warmup · suite warmup (tanstack-start) · at 03:11:10Z · abandoned wrun_01M79E5MPWSTFFW775J6QMWWS5
run-pickup-stall · cancelRun via CLI - cancelling a running workflow (nextjs-webpack) · at 03:20:45Z · abandoned wrun_01M79EQJZVZZ140V7EJV3BN6GK

E2E Test Summary

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	4649	940	5589
✅ 💻 Local Development	5272	731	6003
✅ 📦 Local Production	5272	731	6003
✅ 🐘 Local Postgres	5417	586	6003
✅ 🪟 Windows	401	13	414
✅ dynamic-runs	0	0	0
✅ local-postgres-spec9	0	364	364
✅ local-spec9	409	5	414
✅ vercel-http-transport	1054	188	1242
✅ vercel-multi-region	27	0	27
✅ vercel-queue-hold	0	0	0
✅ vercel-spec9	395	19	414
✅ vercel-ws-transport	712	116	828
Total	23608	3693	27301

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro-node	171	36
✅ astro-quickjs	170	37
✅ example-node	171	36
✅ example-quickjs	170	37
✅ express-node	171	36
✅ express-quickjs	170	37
✅ fastify-node	171	36
✅ fastify-quickjs	170	37
✅ hono-node	171	36
✅ hono-quickjs	170	37
✅ nest-node	171	36
✅ nest-quickjs	170	37
✅ nextjs-turbopack-node	199	8
✅ nextjs-turbopack-quickjs	198	9
✅ nextjs-webpack-node	199	8
✅ nextjs-webpack-quickjs	198	9
✅ nitro-node	171	36
✅ nitro-quickjs	170	37
✅ nuxt-node	171	36
✅ nuxt-quickjs	170	37
✅ python-node	66	141
✅ sveltekit-node	190	17
✅ sveltekit-quickjs	189	18
✅ tanstack-start-node	171	36
✅ tanstack-start-quickjs	170	37
✅ vite-node	171	36
✅ vite-quickjs	170	37

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable-node	172	35
✅ astro-stable-quickjs	171	36
✅ express-stable-node	172	35
✅ express-stable-quickjs	171	36
✅ fastify-stable-node	172	35
✅ fastify-stable-quickjs	171	36
✅ hono-stable-node	172	35
✅ hono-stable-quickjs	171	36
✅ nest-stable-node	172	35
✅ nest-stable-quickjs	171	36
✅ nextjs-turbopack-canary-node	201	6
✅ nextjs-turbopack-canary-quickjs	200	7
✅ nextjs-turbopack-quickjs-snapshot	200	7
✅ nextjs-turbopack-stable-node	201	6
✅ nextjs-turbopack-stable-quickjs	200	7
✅ nextjs-webpack-canary-node	201	6
✅ nextjs-webpack-canary-quickjs	200	7
✅ nextjs-webpack-stable-node	201	6
✅ nextjs-webpack-stable-quickjs	200	7
✅ nitro-stable-node	172	35
✅ nitro-stable-quickjs	171	36
✅ nuxt-stable-node	172	35
✅ nuxt-stable-quickjs	171	36
✅ sveltekit-stable-node	191	16
✅ sveltekit-stable-quickjs	190	17
✅ tanstack-start-node	172	35
✅ tanstack-start-quickjs	171	36
✅ vite-stable-node	172	35
✅ vite-stable-quickjs	171	36

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable-node	172	35
✅ astro-stable-quickjs	171	36
✅ express-stable-node	172	35
✅ express-stable-quickjs	171	36
✅ fastify-stable-node	172	35
✅ fastify-stable-quickjs	171	36
✅ hono-stable-node	172	35
✅ hono-stable-quickjs	171	36
✅ nest-stable-node	172	35
✅ nest-stable-quickjs	171	36
✅ nextjs-turbopack-canary-node	201	6
✅ nextjs-turbopack-canary-quickjs	200	7
✅ nextjs-turbopack-quickjs-snapshot	200	7
✅ nextjs-turbopack-stable-node	201	6
✅ nextjs-turbopack-stable-quickjs	200	7
✅ nextjs-webpack-canary-node	201	6
✅ nextjs-webpack-canary-quickjs	200	7
✅ nextjs-webpack-stable-node	201	6
✅ nextjs-webpack-stable-quickjs	200	7
✅ nitro-stable-node	172	35
✅ nitro-stable-quickjs	171	36
✅ nuxt-stable-node	172	35
✅ nuxt-stable-quickjs	171	36
✅ sveltekit-stable-node	191	16
✅ sveltekit-stable-quickjs	190	17
✅ tanstack-start-node	172	35
✅ tanstack-start-quickjs	171	36
✅ vite-stable-node	172	35
✅ vite-stable-quickjs	171	36

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable-node	177	30
✅ astro-stable-quickjs	176	31
✅ express-stable-node	177	30
✅ express-stable-quickjs	176	31
✅ fastify-stable-node	177	30
✅ fastify-stable-quickjs	176	31
✅ hono-stable-node	177	30
✅ hono-stable-quickjs	176	31
✅ nest-stable-node	177	30
✅ nest-stable-quickjs	176	31
✅ nextjs-turbopack-canary-node	206	1
✅ nextjs-turbopack-canary-quickjs	205	2
✅ nextjs-turbopack-quickjs-snapshot	205	2
✅ nextjs-turbopack-stable-node	206	1
✅ nextjs-turbopack-stable-quickjs	205	2
✅ nextjs-webpack-canary-node	206	1
✅ nextjs-webpack-canary-quickjs	205	2
✅ nextjs-webpack-stable-node	206	1
✅ nextjs-webpack-stable-quickjs	205	2
✅ nitro-stable-node	177	30
✅ nitro-stable-quickjs	176	31
✅ nuxt-stable-node	177	30
✅ nuxt-stable-quickjs	176	31
✅ sveltekit-stable-node	196	11
✅ sveltekit-stable-quickjs	195	12
✅ tanstack-start-node	177	30
✅ tanstack-start-quickjs	176	31
✅ vite-stable-node	177	30
✅ vite-stable-quickjs	176	31

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	201	0	6
✅ nextjs-turbopack-quickjs	200	0	7

✅ dynamic-runs

App	Passed	Failed	Skipped
✅ astro-vercel	0	0	0
✅ example-vercel	0	0	0
✅ express-vercel	0	0	0
✅ fastify-vercel	0	0	0
✅ hono-vercel	0	0	0
✅ nest-vercel	0	0	0
✅ nextjs-turbopack-vercel	0	0	0
✅ nextjs-webpack-vercel	0	0	0
✅ nitro-vercel	0	0	0
✅ nuxt-vercel	0	0	0
✅ sveltekit-vercel	0	0	0
✅ tanstack-start-vercel	0	0	0
✅ vite-vercel	0	0	0

✅ local-postgres-spec9

App	Passed	Failed	Skipped
✅ nextjs-turbopack-stable-node	0	0	182
✅ nextjs-turbopack-stable-quickjs	0	0	182

✅ local-spec9

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	205	0	2
✅ nextjs-turbopack-quickjs	204	0	3

✅ vercel-http-transport

App	Passed	Skipped
✅ example	171	36
✅ express	171	36
✅ hono	171	36
✅ nextjs-turbopack	199	8
✅ nitro	171	36
✅ vite	171	36

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

✅ vercel-queue-hold

App	Passed	Failed	Skipped
✅ nextjs-turbopack	0	0	0

✅ vercel-spec9

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	198	0	9
✅ nextjs-turbopack-quickjs	197	0	10

✅ vercel-ws-transport

App	Passed	Skipped
✅ example	171	36
✅ express	171	36
✅ nextjs-turbopack	199	8
✅ vite	171	36

📋 View full workflow run

github-actions · 2026-11-13T02:37:33Z

Sim World

Simulated world deterministic testing for races. Traces

🟢 world-sim scenario book — 0 fail of 45 total

scenario	outcome	events	virt	replay
✅ `smoke-no-steps`	completed	3	0ms	ok
✅ `smoke-one-step`	completed	5	0ms	ok
✅ `hook-at-step-started`	completed	9	0ms	ok
✅ `hook-at-step-completed`	completed	9	0ms	ok
✅ `hook-at-hook-created`	completed	9	0ms	ok
✅ `claim-hook-at-registration`	completed	9	0ms	ok
✅ `claim-hook-at-step-started`	completed	9	0ms	ok
✅ `deadline-hook-wins`	completed	6	1.0h	ok
✅ `deadline-expires`	completed	6	1.0h	ok
✅ `step-vs-timer-early-settlement`	completed	6	1.0h	ok
✅ `long-sleep`	completed	9	30.0d	ok
✅ `hook-never-arrives`	stalled	3	0ms	skipped
✅ `step-retries-twice`	completed	9	2.0s	ok
✅ `parallel-steps`	completed	7	0ms	ok
✅ `hook-on-execution-state`	completed	9	0ms	ok
✅ `peek-hook-before-branch`	completed	9	0ms	ok
✅ `peek-hook-after-branch`	completed	9	0ms	ok
✅ `peek-hook-at-registration`	completed	9	0ms	ok
✅ `race-hook-before-probe`	completed	9	0ms	ok
✅ `race-hook-after-probe`	completed	9	0ms	ok
✅ `race-duplicate-delivery`	completed	10	0ms	ok
✅ `attr-hook-before-step`	completed	9	0ms	ok
✅ `attr-hook-after-step`	completed	9	0ms	ok
✅ `attr-from-step-body`	completed	10	0ms	ok
✅ `fork-hook-after-timeout`	completed	11	1.0m	ok
✅ `fork-hook-before-timeout`	completed	11	1.0m	ok
✅ `count-hook-after-timeout`	completed	13	1.0m	ok
✅ `count-hook-before-timeout`	completed	15	1.0m	ok
✅ `stale-read-step-count-fork`	completed	15	1.0m	ok
✅ `stale-read-equal-step-counts`	completed	11	1.0m	ok
✅ `step-vs-step-fork`	completed	9	0ms	ok
✅ `step-vs-step-fork-fenced`	completed	9	1.0s	ok
✅ `fence-catches-benign-direction`	completed	9	1.0s	ok
✅ `run-ahead-fenced-overlap`	completed	10	1.0s	ok
✅ `in-flight-before-decision`	completed	15	1.0m	ok
✅ `in-flight-before-decision-counted`	completed	13	1.0m	ok
✅ `in-flight-after-decision`	completed	15	2.0m	ok
✅ `stale-read-step-count-fork-fenced`	completed	15	1.0m	ok
✅ `fork-hook-wins`	completed	10	1.0m	ok
✅ `fork-timeout-wins`	completed	10	1.0m	ok
✅ `unclaimed-payload-under-fork`	completed	14	1.0m	ok
✅ `claimed-payload-under-fork`	completed	14	1.0m	ok
✅ `writers-independent-step-bodies`	completed	9	0ms	ok
✅ `writers-scripted-tempo`	completed	9	0ms	ok
✅ `cancel-mid-step`	cancelled	6	0ms	skipped

Full trace: world-sim.txt

github-actions · 2026-11-13T02:37:42Z

Framework	Flow route	Step reg.	Framework output
hono	306.2 KiB (-7 B)	123.3 KiB (-664 B)	2.37 MiB (-3.7 KiB)
nextjs-turbopack	397.7 KiB (-7 B)	491 B (±0)	1.13 MiB (-2.5 KiB)

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.

611553b · run

The current SDK writes attributes as attr_set events and never calls the method. Revert the rename, mark the method and ExperimentalSetAttributesResult deprecated, and remove the unreachable __builtin_set_attributes bridge. First-party World implementations stay for workflow 5.0.0-beta.8 to beta.14. Signed-off-by: Pranay Prakash <pranay.gp@gmail.com> Co-authored-by: vercel-v[bot] <353008837+vercel-v[bot]@users.noreply.github.com>

vercel Bot deployed to Preview – workflow-docs November 13, 2026 02:35

View deployment

pranaygp changed the title ~~[world] Rename runs.experimentalSetAttributes to runs.setAttributes~~ [world] Deprecate runs.experimentalSetAttributes and remove the unused attributes bridge Nov 13, 2026

vercel Bot deployed to Preview – workflow-docs November 13, 2026 03:07

View deployment

Navigation Menu

Repository navigation

[world] Deprecate runs.experimentalSetAttributes and remove the unused attributes bridge - #5406

[world] Deprecate runs.experimentalSetAttributes and remove the unused attributes bridge#5406
pranaygp wants to merge 2 commits into
mainfrom
world-runs-set-attributes

pranaygp commented Nov 13, 2026 •

edited

Loading

Uh oh!

changeset-bot Bot commented Nov 13, 2026 •

edited

Loading

Uh oh!

vercel Bot commented Nov 13, 2026 •

edited

Loading

Uh oh!

github-actions Bot commented Nov 13, 2026 •

edited

Loading

`c8254e6`

Uh oh!

github-actions Bot commented Nov 13, 2026 •

edited

Loading

Uh oh!

github-actions Bot commented Nov 13, 2026 •

edited

Loading

Uh oh!

github-actions Bot commented Nov 13, 2026 •

edited

Loading

Uh oh!

This branch was successfully deployed

Reviewers

Uh oh!

Assignees

Labels

Projects

Milestone

Development

Uh oh!

1 participant

Conversation

pranaygp commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

changeset-bot Bot commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

🦋 Changeset detected

Uh oh!

vercel Bot commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

github-actions Bot commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

📊 Workflow Benchmarks

c8254e6

Uh oh!

github-actions Bot commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

🧪 E2E Test Results

⚠️ Flaky E2E Tests (passed on retry)

🛠 Infra Events (absorbed by the harness)

E2E Test Summary

Uh oh!

github-actions Bot commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Sim World

Uh oh!

github-actions Bot commented Nov 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

This branch was successfully deployed

Reviewers

Uh oh!

Assignees

Labels

Projects

Milestone

Development

Uh oh!

1 participant

pranaygp commented Nov 13, 2026 •

edited

Loading

changeset-bot Bot commented Nov 13, 2026 •

edited

Loading

vercel Bot commented Nov 13, 2026 •

edited

Loading

github-actions Bot commented Nov 13, 2026 •

edited

Loading

`c8254e6`

github-actions Bot commented Nov 13, 2026 •

edited

Loading

github-actions Bot commented Nov 13, 2026 •

edited

Loading

github-actions Bot commented Nov 13, 2026 •

edited

Loading