fix(world): accept lazy terminal run data - fix Zod schema for newer versions

[shalabhc]

Problem

Lazy terminal responses carry outputRef or errorRef without materializing output or error. WorkflowRunSchema declared those terminal payload keys as required, which fails under Zod 4.4's required object property semantics.

Fix

Mark completed output and failed error explicitly optional, matching lazy World responses.

Tests

• pnpm --filter @workflow/world test -- src/runs.test.ts
• pnpm --filter @workflow/world build
• Zod 4.4.3 one-step Preview: completed without callback errors
• Zod 4.5.4: terminal schemas and Next.js production build pass

[changeset-bot]

🦋 Changeset detected

Latest commit: 95315a2

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

This PR includes changesets to release 20 packages

Name	Type
@workflow/world	Patch
@workflow/cli	Patch
@workflow/core	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	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]

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

Project	Deployment	Actions	Updated
example-nextjs-workflow-turbopack	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
example-nextjs-workflow-webpack	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
example-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-astro-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-express-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-fastify-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-hono-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-nestjs-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-nitro-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-nuxt-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-python-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-sveltekit-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-tanstack-start-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workbench-vite-workflow	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workflow-docs	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workflow-swc-playground	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workflow-tarballs	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC
workflow-web	Ready	Preview, v0	Sep 2, 2026 6:59pm UTC

[github-actions]

📊 Workflow Benchmarks

commit 95315a2 · Wed, 02 Sep 2026 19:12:34 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	212 (+17%) 🔻	1235 🔴 (+11%)	1270 🔴 (+11%)	1301 🔴 (+4.8%)	30
TTFS	stream	166 (-19%) 💚	1132 🔴 (±0%)	1224 🔴 (+4.8%)	1438 🔴 (+14%)	30
TTFS	hook + stream	1337 (+5.9%)	1539 🔴 (+13%)	1578 🔴 (+12%)	1692 🔴 (+16%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	536 (-2.5%)	1030 (-45%) 💚	1811 (-4.2%)	2331 (+21%) 🔻	10
Fan-out TTLS	Promise.all(100 steps)	1839 (+8.2%)	2752 (-32%) 💚	3606 (-14%)	8340 (+26%) 🔻	10
STSO	1020 steps (inline)	86 (-14%)	120 (-24%) 💚	148 (-22%) 💚	556 (+62%) 🔻	1019
WO	1020 steps	133827 (-14%)	133827 (-14%)	133827 (-14%)	133827 (-14%)	1
CRTT	first chunk (pooled)	82 (-16%) 💚	109 (-33%) 💚	165 (-11%)	225 (-58%) 💚	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	97 (-24%)	108 (-35%)	127 (-38%)	219 (-40%)	87.5 (-50%)	10
size sweep (100/s, 160B-12KB)	92.5 (-35%)	114 (-51%)	156 (-56%)	270 (-58%)	127 (-21%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	109 (-30%)	119 (-26%)	151 (-24%)	505 (-15%)	123 (-54%)	3
replay eve-gpt-5.6-sol-2000t (1x)	129 (-60%)	115 (-35%)	141 (-51%)	227 (-56%)	216 (-50%)	2
replay eve-gpt-5.6-sol-2000t (2x)	105 (-41%)	153 (-88%)	229 (-91%)	636 (-84%)	253 (-72%)	3

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

1020 steps (inline)

Cumulative STSO time: main 154195ms → this run 132613ms (Δ -21582ms, -14%)

  50-100 ms  ┃                         main   0  this   3    +3
 100-150 ms  ██████████████████░░░░░┃  main 706  this 925  +219
 150-200 ms  ┃█████                    main 227  this  56  -171
 200-250 ms  ┃                         main  48  this   7   -41
 250-300 ms  ┃                         main  19  this   1   -18
 300-350 ms  ┃                         main  10  this   0   -10
 350-400 ms  ┃                         main   4  this   1    -3
 400-450 ms  ┃                         main   2  this   6    +4
 450-500 ms  ┃                         main   2  this   5    +3
 500-550 ms  ┃                         main   1  this   3    +2
 550-600 ms  ┃                         main   0  this   6    +6
 600-650 ms  ┃                         main   0  this   3    +3
 650-700 ms  ┃                         main   0  this   1    +1
 700-750 ms  ┃                         main   0  this   1    +1
950-1000 ms  ┃                         main   0  this   1    +1

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

variant  RTT 1ms→5s+             avg         p50         p90         p99     n
control  ······█▆▁····   97.4 (-30%)   94 (-28%)  127 (-38%)  219 (-40%)  3000
sweep    ······█▆▁····    101 (-37%)   94 (-33%)  156 (-56%)  270 (-58%)  3000
gw 1x    ·····▁█▄▁▁···     97 (-32%)   90 (-31%)  151 (-24%)  505 (-15%)  5295
eve 1x   ·····▁█▅▁····   97.1 (-36%)   90 (-30%)  141 (-51%)  227 (-56%)  5186
eve 2x   ·····▁▅█▂▁···  131.1 (-68%)  116 (-37%)  229 (-91%)  636 (-84%)  7779

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

control  █▆▃▃▁▂▅▃▂▄  89–110ms
sweep    ▆▃▁▁▂▂▂▄▅█  93–116ms
gw 1x    ▄▂▃▃▃▃▂▁█▂  86–123ms
eve 1x   ▂▄▄▃▁▂▇█▃▃  87–114ms
eve 2x   ▃▂▂▂▁▂▃█▄▂  96–223ms

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

sweep  █▇▅▅▂▁▂  99–103ms

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

control  ▃█▂▁▃▆▇▃▂▃  26–33ms
sweep    ▁▅▅▁▄█▇▆▇█  33–41ms
gw 1x    ▁▃▅▁▂▆█▂▃▅  25–29ms
eve 1x   ▁▅▄▂▃▃█▄▅▆  18–26ms
eve 2x   █▁▂▂▂▃█▄▂▄  19–25ms

📜 Previous results (1)

51a7ae3

Tue, 01 Sep 2026 00:49:23 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	1264 (+82%) 🔻	1343 🔴 (+22%) 🔻	1363 🔴 (+22%) 🔻	1547 🔴 (+33%) 🔻	30
TTFS	stream	1262 (+22%) 🔻	1340 🔴 (+22%) 🔻	1388 🔴 (+24%) 🔻	1481 🔴 (+19%) 🔻	30
TTFS	hook + stream	1178 (-4.0%)	1653 🔴 (+23%) 🔻	1736 🔴 (+26%) 🔻	1968 🔴 (-58%) 💚	30
Fan-out TTFS	Promise.all(100 steps)	514 (-7.6%)	859 (+3.6%)	1823 (+14%)	1969 (+5.7%)	10
Fan-out TTLS	Promise.all(100 steps)	1953 (-3.8%)	2867 (+15%)	3844 (+8.2%)	8866 (+38%) 🔻	10
STSO	1020 steps (inline)	101 (+40%) 🔻	128 (-4.5%)	148 (-3.9%)	235 (+10%)	1019
WO	1020 steps	129442 (-3.8%)	129442 (-3.8%)	129442 (-3.8%)	129442 (-3.8%)	1
CRTT	first chunk (pooled)	102 (-8.1%)	142 (-18%) 💚	159 (-23%) 💚	190 (-77%) 💚	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	135 (-21%)	137 (-50%)	164 (-71%)	425 (-68%)	123 (-62%)	10
size sweep (100/s, 160B-12KB)	116 (-15%)	156 (-20%)	210 (-38%)	333 (-51%)	139 (-1%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	124 (-11%)	130 (-27%)	161 (-37%)	501 (-6%)	326 (-13%)	3
replay eve-gpt-5.6-sol-2000t (1x)	119 (-76%)	122 (-67%)	165 (-90%)	486 (-88%)	493 (-77%)	2
replay eve-gpt-5.6-sol-2000t (2x)	123 (-8%)	255 (-20%)	1804 (+277%)	3582 (+413%)	315 (-22%)	3

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]

🧪 E2E Test Results

❌ Some tests failed

❌ Failed E2E Tests

▲ Vercel Production (8 failed)

python-node (8 failed):

• promiseAllWorkflow | wrun_41M1HQS2ZD0GS1Y39WAZC0JDJW | 🔍 observability
• sleepingWorkflow | wrun_41M1HQSR8M0GM9K2NBEBWFNDNZ | 🔍 observability
• parallelSleepWorkflow | wrun_41M1HQSRCC0GNEN5A3CWFZNS2W | 🔍 observability
• nullByteWorkflow | wrun_41M1HQSYYV0GJJDN6KE38Q33S4 | 🔍 observability
• cancelRun - cancelling a running workflow | wrun_41M1HQXXX70GKDMEMAA7F5T52G | 🔍 observability
• cancelRun via CLI - cancelling a running workflow | wrun_41M1HQXY0T0GNN4SZ14B866N7K | 🔍 observability
• sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M1HQY44R0GWA8CN00XCGEZ1S | 🔍 observability
• resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M1HQYN3J0GT35JEE8K79DCNE | 🔍 observability

🌐 Cross-language Conformance (9 failed)

python (9 failed):

• deploymentId: 'latest' is a no-op in non-Vercel worlds | wrun_01M1HQZF2WX8XVVN4Y42C09STA
• promiseAllWorkflow | wrun_41M1HQS2ZD0GS1Y39WAZC0JDJW
• sleepingWorkflow | wrun_41M1HQSR8M0GM9K2NBEBWFNDNZ
• parallelSleepWorkflow | wrun_41M1HQSRCC0GNEN5A3CWFZNS2W
• nullByteWorkflow | wrun_41M1HQSYYV0GJJDN6KE38Q33S4
• cancelRun - cancelling a running workflow | wrun_41M1HQXXX70GKDMEMAA7F5T52G
• cancelRun via CLI - cancelling a running workflow | wrun_41M1HQXY0T0GNN4SZ14B866N7K
• sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M1HQY44R0GWA8CN00XCGEZ1S
• resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M1HQYN3J0GT35JEE8K79DCNE

⚠️ 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.

• addTenWorkflow (hono)
• promiseRaceWorkflow (fastify)
• sleepWinsRaceWorkflow (tanstack-start)
• webhookWorkflow (hono)

🛠 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.

34 infra events

• cold-start-warmup · suite warmup (python) · at 18:57:59Z · abandoned wrun_41M1HQMRAQ0GRMFJTVPQTMF8MY · (+7 more)
• run-pickup-stall · parallelSleepWorkflow (python) · at 18:58:15Z · abandoned wrun_41M1HQRCYV0GGA00VDHNZ0XXNT
• run-pickup-stall · nullByteWorkflow (python) · at 18:58:15Z · abandoned wrun_41M1HQRCYY0GHHNXRCJRH8Q49R
• run-pickup-stall · sleepingWorkflow (python) · at 18:58:15Z · abandoned wrun_41M1HQRCYT0GNQJSK8RKZE13PY
• run-pickup-stall · promiseAllWorkflow (python) · at 18:58:15Z · abandoned wrun_41M1HQRCYM0GHCDHH2CB1Z2X42
• run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 18:58:16Z · abandoned wrun_41M1HQRD9C0GS24G8QGR2B6FFQ
• run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 18:58:48Z · abandoned wrun_41M1HQSCVW0GPDBR2YYSS1TKBR
• run-pickup-stall · parallelSleepWorkflow (python) · at 18:59:15Z · abandoned wrun_41M1HQT85X0GN21ST9W0KX1369
• run-pickup-stall · sleepingWorkflow (python) · at 18:59:15Z · abandoned wrun_41M1HQT87H0GZP8GMXCY10BRQE
• run-pickup-stall · promiseAllWorkflow (python) · at 18:59:16Z · abandoned wrun_41M1HQT8690GWD236S9Y9ZZB4D
• run-pickup-stall · nullByteWorkflow (python) · at 18:59:16Z · abandoned wrun_41M1HQT8RN0GMWKWFKX7H7WFTY
• cold-start-warmup · suite warmup (tanstack-start) · at 18:59:42Z · abandoned wrun_01M1HQTPGT30GVN9ZGZ1GV5WJG
• run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 19:00:06Z · abandoned wrun_41M1HQTBW80GSBGJBXQ4NF0Q0V
• cold-start-warmup · suite warmup (python) · at 19:00:35Z · abandoned wrun_01M1HQSGNBX54G8FR7AS1SRQ3G · (+7 more)
• run-pickup-stall · promiseAllWorkflow (python) · at 19:00:50Z · abandoned wrun_01M1HQX5SVE7A69XAK160NXYXR
• run-pickup-stall · parallelSleepWorkflow (python) · at 19:00:50Z · abandoned wrun_01M1HQX5T244V7B4N3J5G36Y3V
• run-pickup-stall · nullByteWorkflow (python) · at 19:00:50Z · abandoned wrun_01M1HQX5T4JZGMPE9SKQT3G47J
• run-pickup-stall · deploymentId: 'latest' is a no-op in non-Vercel worlds (python) · at 19:00:50Z · abandoned wrun_01M1HQX5STEV692VYCV9NAJY3M
• run-pickup-stall · sleepingWorkflow (python) · at 19:00:50Z · abandoned wrun_01M1HQX5T0WQJQCMGHVRS3DP3Y
• run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 19:01:47Z · abandoned wrun_41M1HQW9QQ0GRKPRHXY92ASARD
• run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 19:01:47Z · abandoned wrun_41M1HQX3RT0GS51V7KHRNB06K0
• run-pickup-stall · deploymentId: 'latest' is a no-op in non-Vercel worlds (python) · at 19:01:50Z · abandoned wrun_01M1HQZ0DG7GPH84K8263P9HXC
• run-pickup-stall · promiseAllWorkflow (python) · at 19:01:50Z · abandoned wrun_01M1HQZ0DJ6NDP54QWAF53Z6XS
• run-pickup-stall · sleepingWorkflow (python) · at 19:01:50Z · abandoned wrun_01M1HQZ0DNTFWJKBAS6P5A1MVE
• run-pickup-stall · parallelSleepWorkflow (python) · at 19:01:50Z · abandoned wrun_01M1HQZ0DRW6TXSWB2GRD4MV9Q
• run-pickup-stall · nullByteWorkflow (python) · at 19:01:50Z · abandoned wrun_01M1HQZ0DYGQB5WD6YXF0YRVKP
• run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 19:02:50Z · abandoned wrun_01M1HR0V16FEMZK2RCHN2KX9VQ
• run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 19:02:50Z · abandoned wrun_01M1HR0V1NBG9FX7BF8BVDK9SF
• run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 19:02:50Z · abandoned wrun_01M1HR0V1DDHHAZYVJGEQ2EXN3
• run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 19:03:20Z · abandoned wrun_01M1HR1RCTFXJZJ34F1P34A6Z9
• run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 19:03:20Z · abandoned wrun_01M1HR1RD4K34WG7BATEJWA2WZ
• run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 19:03:50Z · abandoned wrun_01M1HR2NMRKMRFR84N1CMQMFRA
• run-pickup-stall · hookCleanupTestWorkflow - hook token reuse after workflow completion (nextjs-webpack) · at 19:07:25Z · abandoned wrun_01M1HR971V2AV9B59XTARFNWWN
• run-pickup-stall · concurrent hook token conflict - two workflows cannot use the same hook token simultaneously (nextjs-webpack) · at 19:07:29Z · abandoned wrun_01M1HR9BM8WSFWR2Y6DPVYJGT9

E2E Test Summary

Summary

	Passed	Failed	Skipped	Total
❌ ▲ Vercel Production	3570	8	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	0	9	132	141
✅ vercel-http-transport	817	0	143	960
✅ vercel-multi-region	27	0	0	27
✅ vercel-ws-transport	553	0	87	640
Total	17053	17	2778	19848

Details by Category

❌ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro-node	132	0	28
✅ astro-quickjs	132	0	28
✅ example-node	132	0	28
✅ example-quickjs	132	0	28
✅ express-node	132	0	28
✅ express-quickjs	132	0	28
✅ fastify-node	132	0	28
✅ fastify-quickjs	132	0	28
✅ hono-node	132	0	28
✅ hono-quickjs	132	0	28
✅ nest-node	132	0	28
✅ nest-quickjs	132	0	28
✅ nextjs-turbopack-node	157	0	3
✅ nextjs-turbopack-quickjs	157	0	3
✅ nextjs-webpack-node	157	0	3
✅ nextjs-webpack-quickjs	157	0	3
✅ nitro-node	132	0	28
✅ nitro-quickjs	132	0	28
✅ nuxt-node	132	0	28
✅ nuxt-quickjs	132	0	28
❌ python-node	0	8	152
✅ sveltekit-node	151	0	9
✅ sveltekit-quickjs	151	0	9
✅ tanstack-start-node	132	0	28
✅ tanstack-start-quickjs	132	0	28
✅ vite-node	132	0	28
✅ vite-quickjs	132	0	28

✅ 💻 Local Development

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

✅ 📦 Local Production

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

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable-node	134	0	26
✅ astro-stable-quickjs	134	0	26
✅ express-stable-node	134	0	26
✅ express-stable-quickjs	134	0	26
✅ fastify-stable-node	134	0	26
✅ fastify-stable-quickjs	134	0	26
✅ hono-stable-node	134	0	26
✅ hono-stable-quickjs	134	0	26
✅ nest-stable-node	134	0	26
✅ nest-stable-quickjs	134	0	26
✅ nextjs-turbopack-canary-node	141	0	19
✅ nextjs-turbopack-canary-quickjs	141	0	19
✅ nextjs-turbopack-stable-node	160	0	0
✅ nextjs-turbopack-stable-quickjs	160	0	0
✅ nextjs-webpack-canary-node	141	0	19
✅ nextjs-webpack-canary-quickjs	141	0	19
✅ nextjs-webpack-stable-node	160	0	0
✅ nextjs-webpack-stable-quickjs	160	0	0
✅ nitro-stable-node	134	0	26
✅ nitro-stable-quickjs	134	0	26
✅ nuxt-stable-node	134	0	26
✅ nuxt-stable-quickjs	134	0	26
✅ sveltekit-stable-node	153	0	7
✅ sveltekit-stable-quickjs	153	0	7
✅ tanstack-start-node	134	0	26
✅ tanstack-start-quickjs	134	0	26
✅ vite-stable-node	134	0	26
✅ vite-stable-quickjs	134	0	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	0	9	132

✅ vercel-http-transport

App	Passed	Failed	Skipped
✅ example	132	0	28
✅ express	132	0	28
✅ hono	132	0	28
✅ nextjs-turbopack	157	0	3
✅ nitro	132	0	28
✅ vite	132	0	28

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

✅ vercel-ws-transport

App	Passed	Failed	Skipped
✅ example	132	0	28
✅ express	132	0	28
✅ nextjs-turbopack	157	0	3
✅ vite	132	0	28

---

📋 View full workflow run

[github-actions]

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

Full trace: world-sim.txt

[github-actions]

Framework	Flow route	Step reg.	Framework output
hono	200.9 KiB (±0)	40.6 KiB (±0)	1.77 MiB (+1 B)
nextjs-turbopack	206.3 KiB (±0)	439 B (±0)	765.5 KiB (+2 B)

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.

95315a2 · run

[NathanColosimo]

LGTM

[github-actions]

Backport PR opened against stable: #3939. Merge conflicts were resolved by AI — please review carefully. (backport job run)