Stamp request provenance on step starts by alangenfeld · Pull Request #3567 · vercel/workflow

alangenfeld · 2026-08-14T23:11:36Z

Summary & Motivation

step_started now carries the invocation's request ID alongside the compute instance ID, so observability can show both dimensions of where an attempt ran. The two stay independent fields — world-vercel maps requestId onto its analytics vercelId, which the compute instance ID doesn't stand in for.

Test Plan

Unit tests added for the stamping on all three step-start paths, including when no request ID is available.

Signed-off-by: Alex Langenfeld <alex.langenfeld@vercel.com>

changeset-bot · 2026-08-14T23:11:41Z

🦋 Changeset detected

Latest commit: ba2471a

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

This PR includes changesets to release 16 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/vitest	Patch
@workflow/web-shared	Patch
@workflow/web	Patch
workflow	Patch
@workflow/world-testing	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 · 2026-08-14T23:11:43Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview	Aug 14, 2026 11:15pm
example-nextjs-workflow-webpack	Ready	Preview	Aug 14, 2026 11:15pm
example-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-astro-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-express-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-fastify-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-hono-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-nestjs-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-nitro-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-nuxt-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-python-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-sveltekit-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-tanstack-start-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workbench-vite-workflow	Ready	Preview	Aug 14, 2026 11:15pm
workflow-docs	Ready	Preview, v0	Aug 14, 2026 11:15pm
workflow-swc-playground	Ready	Preview	Aug 14, 2026 11:15pm
workflow-tarballs	Ready	Preview	Aug 14, 2026 11:15pm
workflow-web	Ready	Preview	Aug 14, 2026 11:15pm

github-actions · 2026-08-14T23:13:00Z

📊 Workflow Benchmarks

commit ba2471a · Fri, 14 Aug 2026 23:37:10 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	241 (-70%) 💚	1525 🔴 (+35%) 🔻	1568 🔴 (+31%) 🔻	1819 🔴 (+8.5%)	30
TTFS	stream	286 (-72%) 💚	1505 🔴 (+31%) 🔻	1543 🔴 (+31%) 🔻	1583 🔴 (+19%) 🔻	30
TTFS	hook + stream	382 (-27%) 💚	1777 🔴 (+25%) 🔻	1823 🔴 (+27%) 🔻	1925 🔴 (+20%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	9315 (+1.6%)	10806 (+12%)	10922 (+5.8%)	11266 (+6.4%)	10
Fan-out TTLS	Promise.all(100 steps)	18104 (+0.9%)	20284 (+3.5%)	20915 (+3.0%)	21181 (+4.1%)	10
STSO	1020 steps (inline)	128 (-9.2%)	444 (-5.3%)	484 (-6.7%)	716 (+8.2%)	1018
STSO	1020 steps (queue-hop)	2145	2145	2145	2145	1
WO	1020 steps	395073 (-3.3%)	395073 (-3.3%)	395073 (-3.3%)	395073 (-3.3%)	1
CRTT	first chunk (pooled)	101 (-1.0%)	157 (-10%)	251 (-38%) 💚	967 (+48%) 🔻	28

Streams

Scenario	wr c/s	rd c/s	wr KiB/s	rd KiB/s	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	100 (±0%)	100 (±0%)	5 (±0%)	5.1 (±0%)	141 (-4%)	291 (+68%)	405 (-41%)	1250 (+14%)	217 (+59%)	10
size sweep (100/s, 160B-12KB)	100 (±0%)	99.9 (-2%)	334 (±0%)	333 (-2%)	112 (-15%)	189 (-28%)	416 (-17%)	1123 (+44%)	152 (-26%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	89.2 (±0%)	88.9 (-1%)	16.2 (±0%)	16.2 (-1%)	157 (-62%)	151 (-66%)	223 (-63%)	583 (-44%)	736 (+10%)	3
replay eve-gpt-5.6-sol-2000t (1x)	54.7 (±0%)	54.7 (±0%)	355 (±0%)	355 (±0%)	152 (+5%)	140 (-15%)	210 (-3%)	496 (+16%)	861 (+142%)	2
replay eve-gpt-5.6-sol-2000t (2x)	109 (±0%)	109 (±0%)	710 (±0%)	709 (±0%)	124 (-35%)	208 (-51%)	357 (-47%)	876 (-45%)	520 (+51%)	3

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

1020 steps (inline)

Cumulative STSO time: main 408504ms → this run 391566ms (Δ -16938ms, -4%)

  100-150 ms  ┃                         main   4  this   8    +4
  150-200 ms  ██┃                       main  22  this  26    +4
  200-250 ms  ████┃█                    main  58  this  46   -12
  250-300 ms  ██████████┃               main  95  this  97    +2
  300-350 ms  ███████████████░░░░░┃     main 141  this 194   +53
  350-400 ms  ███████████████████┃      main 186  this 187    +1
  400-450 ms  ███████████████████░░░░┃  main 176  this 221   +45
  450-500 ms  █████████████████┃██      main 185  this 163   -22
  500-550 ms  ███┃██████                main  93  this  38   -55
  550-600 ms  █┃█                       main  31  this  14   -17
  600-650 ms  ┃█                        main  16  this   8    -8
  650-700 ms  ┃                         main   3  this   3    +0
  700-750 ms  ┃                         main   5  this   5    +0
  750-800 ms  ┃                         main   2  this   4    +2
  800-850 ms  ┃                         main   0  this   1    +1
  900-950 ms  ┃                         main   0  this   1    +1
 950-1000 ms  ┃                         main   0  this   1    +1
1050-1100 ms  ┃                         main   1  this   1    +0
2300-2350 ms  ┃                         main   1  this   0    -1

1020 steps (queue-hop)

Cumulative STSO time: 2145ms over 1 samples

_{No main baseline with raw samples yet — showing this run's distribution on its own; the diff appears once a run on main has recorded them.}

2000-2200 ms  ████████████████████████  steps 1

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

variant  RTT 1ms→5s+             avg         p50         p90          p99     n
control  ······▂█▃▁▁··     191 (+7%)   138 (+8%)  405 (-41%)  1250 (+14%)  3000
sweep    ······▃█▃▁▁··  171.6 (-12%)  124 (-10%)  416 (-17%)  1123 (+44%)  3000
gw 1x    ·····▁▅█▂▁▁··  132.8 (-50%)  111 (-47%)  223 (-63%)   583 (-44%)  5295
eve 1x   ·····▁▇█▂▁▁··   129.9 (-8%)  105 (-15%)   210 (-3%)   496 (+16%)  5186
eve 2x   ·····▁▂█▃▁▁··  168.4 (-32%)  144 (-28%)  357 (-47%)   876 (-45%)  7779

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

control  ▅▃▂█▃▃▃▂▁▂  144–290ms
sweep    ▃▁▆▃▄▄█▇▄▆  134–211ms
gw 1x    ▃█▄▄▂▁▁▁▂▃  106–204ms
eve 1x   █▁▁▄▁▁▃▅▅▁  108–182ms
eve 2x   ▆▄▃▅▁▂█▆▃▁  127–224ms

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

sweep  ▁▅█▄▃▁▁  170–176ms

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

control  ▂▂█▆▁▁▁▃▂▃  35–85ms
sweep    ▁▅█▄▄▃█▄▄▄  39–69ms
gw 1x    ▂█▄▂▁▁▁▁▁▃  34–53ms
eve 1x   █▁▁▄▂▂▄▄▄▂  20–39ms
eve 2x   █▃▂▁▂▂▆▂▂▄  25–35ms

ℹ️ Metric definitions & methodology

_{Streams: writer/reader sustained rates (steady window, 10% trimmed each side), 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 · 2026-08-14T23:13:08Z

🧪 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.

setAttributesInsideStepWorkflow: step-body calls append attributed native events (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.

run-pickup-stall · addTenWorkflow (tanstack-start) · at 23:17:44Z · abandoned wrun_01M0191WYSTZ28FPQ4WYYT5VJW

E2E Test Summary

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	3474	738	4212
✅ 💻 Local Development	3536	520	4056
✅ 📦 Local Production	3810	558	4368
✅ 🐘 Local Postgres	3810	558	4368
✅ 🪟 Windows	312	0	312
✅ 🌐 Cross-language Conformance	9	128	137
✅ vercel-multi-region	27	0	27
Total	14978	2502	17480

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro-node	128	28
✅ astro-quickjs	128	28
✅ example-node	128	28
✅ example-quickjs	128	28
✅ express-node	128	28
✅ express-quickjs	128	28
✅ fastify-node	128	28
✅ fastify-quickjs	128	28
✅ hono-node	128	28
✅ hono-quickjs	128	28
✅ nest-node	128	28
✅ nest-quickjs	128	28
✅ nextjs-turbopack-node	153	3
✅ nextjs-turbopack-quickjs	153	3
✅ nextjs-webpack-node	153	3
✅ nextjs-webpack-quickjs	153	3
✅ nitro-node	128	28
✅ nitro-quickjs	128	28
✅ nuxt-node	128	28
✅ nuxt-quickjs	128	28
✅ python-node	8	148
✅ sveltekit-node	147	9
✅ sveltekit-quickjs	147	9
✅ tanstack-start-node	128	28
✅ tanstack-start-quickjs	128	28
✅ vite-node	128	28
✅ vite-quickjs	128	28

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable-node	130	26
✅ astro-stable-quickjs	130	26
✅ express-stable-node	130	26
✅ express-stable-quickjs	130	26
✅ fastify-stable-node	130	26
✅ fastify-stable-quickjs	130	26
✅ hono-stable-node	130	26
✅ hono-stable-quickjs	130	26
✅ nest-stable-node	130	26
✅ nest-stable-quickjs	130	26
✅ nextjs-turbopack-canary-quickjs	137	19
✅ nextjs-turbopack-stable-node	156	0
✅ nextjs-turbopack-stable-quickjs	156	0
✅ nextjs-webpack-canary-quickjs	137	19
✅ nextjs-webpack-stable-node	156	0
✅ nextjs-webpack-stable-quickjs	156	0
✅ nitro-stable-node	130	26
✅ nitro-stable-quickjs	130	26
✅ nuxt-stable-node	130	26
✅ nuxt-stable-quickjs	130	26
✅ sveltekit-stable-node	149	7
✅ sveltekit-stable-quickjs	149	7
✅ tanstack-start-node	130	26
✅ tanstack-start-quickjs	130	26
✅ vite-stable-node	130	26
✅ vite-stable-quickjs	130	26

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable-node	130	26
✅ astro-stable-quickjs	130	26
✅ express-stable-node	130	26
✅ express-stable-quickjs	130	26
✅ fastify-stable-node	130	26
✅ fastify-stable-quickjs	130	26
✅ hono-stable-node	130	26
✅ hono-stable-quickjs	130	26
✅ nest-stable-node	130	26
✅ nest-stable-quickjs	130	26
✅ nextjs-turbopack-canary-node	137	19
✅ nextjs-turbopack-canary-quickjs	137	19
✅ nextjs-turbopack-stable-node	156	0
✅ nextjs-turbopack-stable-quickjs	156	0
✅ nextjs-webpack-canary-node	137	19
✅ nextjs-webpack-canary-quickjs	137	19
✅ nextjs-webpack-stable-node	156	0
✅ nextjs-webpack-stable-quickjs	156	0
✅ nitro-stable-node	130	26
✅ nitro-stable-quickjs	130	26
✅ nuxt-stable-node	130	26
✅ nuxt-stable-quickjs	130	26
✅ sveltekit-stable-node	149	7
✅ sveltekit-stable-quickjs	149	7
✅ tanstack-start-node	130	26
✅ tanstack-start-quickjs	130	26
✅ vite-stable-node	130	26
✅ vite-stable-quickjs	130	26

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable-node	130	26
✅ astro-stable-quickjs	130	26
✅ express-stable-node	130	26
✅ express-stable-quickjs	130	26
✅ fastify-stable-node	130	26
✅ fastify-stable-quickjs	130	26
✅ hono-stable-node	130	26
✅ hono-stable-quickjs	130	26
✅ nest-stable-node	130	26
✅ nest-stable-quickjs	130	26
✅ nextjs-turbopack-canary-node	137	19
✅ nextjs-turbopack-canary-quickjs	137	19
✅ nextjs-turbopack-stable-node	156	0
✅ nextjs-turbopack-stable-quickjs	156	0
✅ nextjs-webpack-canary-node	137	19
✅ nextjs-webpack-canary-quickjs	137	19
✅ nextjs-webpack-stable-node	156	0
✅ nextjs-webpack-stable-quickjs	156	0
✅ nitro-stable-node	130	26
✅ nitro-stable-quickjs	130	26
✅ nuxt-stable-node	130	26
✅ nuxt-stable-quickjs	130	26
✅ sveltekit-stable-node	149	7
✅ sveltekit-stable-quickjs	149	7
✅ tanstack-start-node	130	26
✅ tanstack-start-quickjs	130	26
✅ vite-stable-node	130	26
✅ vite-stable-quickjs	130	26

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	156	0	0
✅ nextjs-turbopack-quickjs	156	0	0

✅ 🌐 Cross-language Conformance

App	Passed	Failed	Skipped
✅ python	9	0	128

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

📋 View full workflow run

github-actions · 2026-08-14T23:16:14Z

Sim World

Simulated world deterministic testing for races. Traces

🟠 Mint-ordered log — 3 fail of 41 total

log=mint-ordered · 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`	failed	9	1.0m	MISMATCH	1
❌ `in-flight-before-decision-counted`	failed	9	1.0m	MISMATCH	1
❌ `in-flight-after-decision`	failed	9	1.0m	MISMATCH	1
✅ `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-mint.txt

🟢 Append-only log — 0 fail of 41 total

log=append-only · 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-append-only.txt

fix(core): stamp request IDs on step starts

ba2471a

Signed-off-by: Alex Langenfeld <alex.langenfeld@vercel.com>

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Stamp request provenance on step starts - #3567

Stamp request provenance on step starts#3567
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