[core] Sort imports flagged by Biome's organizeImports - #3241

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[core] Sort imports flagged by Biome's organizeImports#3241
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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

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VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
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VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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[core] Sort imports flagged by Biome's organizeImports - #3241

Merged
VaguelySerious merged 1 commit into
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peter/fix-biome-organize-imports
Jul 31, 2026
Merged

[core] Sort imports flagged by Biome's organizeImports#3241
VaguelySerious merged 1 commit into
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peter/fix-biome-organize-imports

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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

This PR includes changesets to release 0 packages

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

@VaguelySerious
VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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@VaguelySerious@TooTallNate
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[core] Sort imports flagged by Biome's organizeImports - #3241

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Jul 31, 2026
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[core] Sort imports flagged by Biome's organizeImports#3241
VaguelySerious merged 1 commit into
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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

This PR includes changesets to release 0 packages

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

@VaguelySerious
VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
@github-actions

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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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[core] Sort imports flagged by Biome's organizeImports - #3241

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[core] Sort imports flagged by Biome's organizeImports#3241
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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

@VaguelySerious
VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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[core] Sort imports flagged by Biome's organizeImports - #3241

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peter/fix-biome-organize-imports
Jul 31, 2026
Merged

[core] Sort imports flagged by Biome's organizeImports#3241
VaguelySerious merged 1 commit into
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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

This PR includes changesets to release 0 packages

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

@VaguelySerious
VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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@VaguelySerious@TooTallNate
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[core] Sort imports flagged by Biome's organizeImports - #3241

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VaguelySerious merged 1 commit into
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Jul 31, 2026
Merged

[core] Sort imports flagged by Biome's organizeImports#3241
VaguelySerious merged 1 commit into
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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

This PR includes changesets to release 0 packages

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

@VaguelySerious
VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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@VaguelySerious@TooTallNate
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[core] Sort imports flagged by Biome's organizeImports - #3241

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VaguelySerious merged 1 commit into
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Jul 31, 2026
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[core] Sort imports flagged by Biome's organizeImports#3241
VaguelySerious merged 1 commit into
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peter/fix-biome-organize-imports

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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
@VaguelySerious
VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

This PR includes changesets to release 0 packages

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

@VaguelySerious
VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
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[core] Sort imports flagged by Biome's organizeImports - #3241

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Jul 31, 2026
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[core] Sort imports flagged by Biome's organizeImports#3241
VaguelySerious merged 1 commit into
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peter/fix-biome-organize-imports

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main is red on the Biome check: assist/source/organizeImports reports packages/core/src/runtime.ts and packages/core/src/runtime/step-executor.ts (run 30587485140). Both COMPUTE_INSTANCE_ID imports landed out of order just before #3222 turned the check on, so every open PR inherits the failure through its merge commit.

This is Biome's own autofix, no behavior change.

🤖 Generated with Claude Code

Biome's `assist/source/organizeImports` fails on `main` since #3222 turned
the check on in CI; the two `COMPUTE_INSTANCE_ID` imports added by #3220 sit
out of order. Fix is Biome's own autofix.
Signed-off-by: Peter Wielander <peter@vercel.com>
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VaguelySerious requested review from a team and ijjk as code ownersJuly 30, 2026 23:01
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🦋 Changeset detected

Latest commit: eb342ae

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

This PR includes changesets to release 0 packages

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

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🧪 E2E Test Results

All tests passed

E2E Test Summary

Summary
PassedFailedSkippedTotal
✅ ▲ Vercel Production145502391694
✅ 💻 Local Development162102271848
✅ 📦 Local Production162102271848
✅ 🐘 Local Postgres162102271848
✅ 🪟 Windows15400154
✅ 📋 Other102002121232
✅ vercel-multi-region270027
Total7519011328651
Details by Category

✅ ▲ Vercel Production

AppPassedFailedSkipped
✅ astro126028
✅ example126028
✅ express126028
✅ fastify126028
✅ hono126028
✅ nextjs-turbopack15103
✅ nextjs-webpack15103
✅ nitro126028
✅ nuxt126028
✅ sveltekit14509
✅ vite126028

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable128026
✅ express-stable128026
✅ fastify-stable128026
✅ hono-stable128026
✅ nextjs-turbopack-canary135019
✅ nextjs-turbopack-stable15400
✅ nextjs-webpack-canary135019
✅ nextjs-webpack-stable15400
✅ nitro-stable128026
✅ nuxt-stable128026
✅ sveltekit-stable14707
✅ vite-stable128026

✅ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack15400

✅ 📋 Other

AppPassedFailedSkipped
✅ e2e-local-dev-nest-stable128026
✅ e2e-local-dev-tanstack-start-128026
✅ e2e-local-postgres-nest-stable128026
✅ e2e-local-postgres-tanstack-start-128026
✅ e2e-local-prod-nest-stable128026
✅ e2e-local-prod-tanstack-start-128026
✅ e2e-vercel-prod-nest126028
✅ e2e-vercel-prod-tanstack-start126028

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit eb342ae · Thu, 30 Jul 2026 23:23:41 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1258 (+24%) 🔻1334 🔴 (+18%) 🔻1362 🔴 (+17%) 🔻1425 🔴 (+13%)30
TTFSstream1245 (+507%) 🔻1301 🔴 (+18%) 🔻1312 🔴 (+16%) 🔻1341 🔴 (-17%) 💚30
TTFShook + stream1472 (+11%)1566 🔴 (+9.3%)1627 🔴 (+11%)1832 🔴 (+12%)30
STSO1020 steps (inline)159 (-14%)444 (-14%)493 (-14%)639 (-21%) 💚1016
STSO1020 steps (queue-hop)2195 (+8.7%)3183 (-32%) 💚3183 (-32%) 💚3183 (-32%) 💚3
WO1020 steps379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚379982 (-16%) 💚1
SLstream latency79 (-29%) 💚136 🔴 (-18%) 💚153 🔴 (-27%) 💚351 🔴 (-9.8%)30
SOstream overhead (text)99 (-25%) 💚148 (-48%) 💚185 (-63%) 💚297 (-89%) 💚30
SOstream overhead (structured)97 (-27%) 💚145 (-48%) 💚200 (-48%) 💚382 (-75%) 💚30
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 440353ms → this run 370247ms (Δ -70106ms, -16%)

 150-200 ms █░░░░┃ main 2 this 43 +41
200-250 ms █████████░░░░░┃ main 63 this 114 +51
250-300 ms ████████████████░░░┃ main 117 this 150 +33
300-350 ms █████████████████░░░░░░┃ main 129 this 177 +48
350-400 ms ███████████████████░┃ main 142 this 152 +10
400-450 ms █████████████████░┃ main 125 this 138 +13
450-500 ms ██████████████████░░┃ main 130 this 156 +26
500-550 ms ███████┃██████████████ main 163 this 56 -107
550-600 ms ┃█████████ main 74 this 11 -63
600-650 ms ┃███ main 29 this 10 -19
650-700 ms ┃█ main 14 this 5 -9
700-750 ms ┃█ main 12 this 2 -10
750-800 ms ┃ main 5 this 0 -5
800-850 ms ┃ main 2 this 1 -1
850-900 ms ┃ main 1 this 1 +0
950-1000 ms ┃ main 1 this 0 -1
1100-1150 ms ┃ main 1 this 0 -1
1150-1200 ms ┃ main 1 this 0 -1
1200-1250 ms ┃ main 1 this 0 -1
1300-1350 ms ┃ main 2 this 0 -2
2050-2100 ms ┃ main 1 this 0 -1
3650-3700 ms ┃ main 1 this 0 -1

1020 steps (queue-hop)

Cumulative STSO time: main 9664ms → this run 8429ms (Δ -1235ms, -13%)

2000-2500 ms ███████████┃ main 1 this 1 +0
2500-3000 ms ┃███████████ main 1 this 0 -1
3000-3500 ms ░░░░░░░░░░░░░░░░░░░░░░░┃ main 0 this 2 +2
4500-5000 ms ┃███████████ main 1 this 0 -1
ℹ️ Metric definitions & methodology

The collapsed STSO distribution section above buckets every step gap of the sequential-steps run (not a sampled window), split by whether the step ending the gap ran inline — in the same warm process as the step before it, so the gap is pure framework overhead — or after a queue-hop — the first step of a fresh process, which pays queue dispatch, client reinit and event-log replay. Bars overlay the two runs: is main, marks where this run lands, bridges the gap when this run has more samples in a bucket.

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, deployment clocks) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · SL: stream latency (in-deployment write → read propagation, readAt - writtenAt) · SO: stream overhead (end-to-end write+consume time beyond the modelled generation window)

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 · stream latency: parallel reader/writer steps on a dedicated stream; SL is the in-deployment write->read propagation (readAt - writtenAt) · stream overhead (text): writer streams 300 variable-length text token deltas paced at 100/s for 3s (a haiku-size LLM's token throughput) while a parallel reader drains the whole stream; SO is the end-to-end write+consume time beyond the 3s generation window (overhead/backpressure) · stream overhead (structured): same workload as stream overhead (text), but each delta is an AI-SDK-style structured object ({ type: 'text-delta', id, text }) instead of a raw string, so the SO gap vs the text scenario is the added serialization cost

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · SO 250/500/1000

All metrics are measured from deployment-side timestamps only. Runs are triggered by an in-deployment route that stamps the anchor (clientStart) right before start(), so the CI runner’s request and its path through api.vercel.com sit outside every measured window. TTFS = in-deployment start() → first step body (turbo uses the in-process fast path, non-turbo the dispatch path), and includes the VQS dispatch hop plus any /flow cold start. STSO/WO are measured between step bodies on the deployment. SL is measured inside the workflow (parallel reader/writer steps), so it no longer includes the api.vercel.com read path.

Cold starts are kept in the numbers on purpose — they are part of real bursty-workload latency. The workbench deployment cold-starts the /flow invocation for a large fraction of runs, inflating P75+; the Best column shows the fastest (warm-start) sample for comparison.

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VaguelySerious merged commit a54f2b1 into mainJul 31, 2026
175 of 178 checks passed
@VaguelySerious
VaguelySerious deleted the peter/fix-biome-organize-imports branch July 31, 2026 00:20
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No backport to stable for a54f2b1 (AI decision).

This is a Biome organizeImports autofix for a lint failure that exists only on main: I verified that packages/core/src/runtime/step-executor.ts and packages/core/src/runtime/compute-instance.ts do not exist on origin/stable, and stable's packages/core/src/runtime.ts has no COMPUTE_INSTANCE_ID import at all. There is nothing to fix on the maintenance line — no behavior change, and the accompanying changeset is empty.

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

a54f2b14860f4901f1746fd5de0dea928bb015e9

pranaygp added a commit that referenced this pull request Jul 31, 2026
…ent-guard
* origin/main:
ci: stop deploying changeset-release/main, run its e2e against production (#3243)
fix(world-local): bound stalled queue deliveries (#3255)
Sort imports in runtime.ts and step-executor.ts (#3241)
pranaygp added a commit that referenced this pull request Jul 31, 2026
…_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
pranaygp added a commit that referenced this pull request Jul 31, 2026
…environment queue deliveries client-side (#3244)
* feat(core): stamp creator environment into runInput and reject cross-environment queue deliveries client-side
`start()` makes two writes that have to land in the same tenant: the
`run_created` event, attributed to whatever environment the caller
authenticates as, and the queue message, pinned to a deployment. A
misconfigured caller can split them — writing the run to one environment
while addressing the message to a deployment in another. The consumer
finds no run under its own tenant, the backend's resilient start
(`run_started` creates the run when `run_created` was never seen) mints a
second copy of the same run id in the consumer's environment, and both
copies are real: the creator's sits pending forever while the other
executes.
The deployment id is not the discriminator — it matched end to end in the
incident that motivated this. The environment is. So carry it: add an
optional `World.getEnvironment()`, implement it in world-vercel from the
same resolution that produces the `x-vercel-environment` header, and stamp
it into the queue message's `runInput`.
The consuming deployment already knows its own environment, so it can
refuse the delivery itself with no server coordination — and refuse before
`run_started`, the write that would create the fork. The refusal acks the
message instead of throwing: the mismatch is baked into the message, so
every redelivery would reach the same verdict and throwing would hot-loop
until MAX_QUEUE_DELIVERIES.
Both sides must be known for the check to run, so worlds with a single
tenant (local, Postgres) and runs started by an older SDK behave exactly
as before. A companion diagnostic logs a deployment-id mismatch without
refusing, since deployment ids differ for benign reasons too.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
* fix(world-vercel): resolve the runtime environment from VERCEL_TARGET_ENV
For a deployment in a Vercel custom environment, the OIDC token's
environment claim is the custom environment's slug (the platform mints
`customEnvironment?.slug ?? envTarget`) while VERCEL_ENV reports
'preview' — so keying the cross-environment guard on VERCEL_ENV could
false-refuse a legitimate delivery, e.g. a CLI client attributed to
'staging' starting a run on the staging deployment. VERCEL_TARGET_ENV
is populated from exactly the same slug-or-target pair as the claim, so
prefer it, keeping VERCEL_ENV as the fallback for contexts that don't
inject it. Also sorts runtime.ts imports per the Biome rule that landed
on main in #3241.
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
---------
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
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