Report STSO step progress telemetry by karthikscale3 · Pull Request #2850 · vercel/workflow

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

karthikscale3 · 2026-07-09T03:14:51Z

What

count unique terminal steps before each STSO measurement
carry that optional progress value with step latency telemetry
preserve compatibility for consumers that do not read the new field

Why

This enables comparing step-to-step overhead at different points in long-running workflows.

Validation

pnpm build
pnpm typecheck
targeted runtime and transport tests (71 passed)
scoped Biome check

The full suite reached its Docker-backed Postgres package; that package was not run after Docker testing was skipped.

changeset-bot · 2026-07-09T03:14:56Z

🦋 Changeset detected

Latest commit: 0873932

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

This PR includes changesets to release 20 packages

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

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

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

vercel · 2026-07-09T03:14:58Z

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-nextjs-workflow-webpack	Ready	Preview, Comment	Jul 9, 2026 4:21pm
example-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-astro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-express-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-fastify-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-hono-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nitro-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-nuxt-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-sveltekit-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-tanstack-start-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workbench-vite-workflow	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-docs	Ready	Preview, Comment, Open in v0	Jul 9, 2026 4:21pm
workflow-swc-playground	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-tarballs	Ready	Preview, Comment	Jul 9, 2026 4:21pm
workflow-web	Ready	Preview, Comment	Jul 9, 2026 4:21pm

github-actions · 2026-07-09T03:15:13Z

🧪 E2E Test Results

✅ All tests passed

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	1453	230	1683
✅ 💻 Local Development	1617	219	1836
✅ 📦 Local Production	1617	219	1836
✅ 🐘 Local Postgres	1617	219	1836
✅ 🪟 Windows	153	0	153
✅ 📋 Other	894	177	1071
Total	7351	1064	8415

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro	126	27
✅ example	126	27
✅ express	126	27
✅ fastify	126	27
✅ hono	126	27
✅ nextjs-turbopack	150	3
✅ nextjs-webpack	150	3
✅ nitro	126	27
✅ nuxt	126	27
✅ sveltekit	145	8
✅ vite	126	27

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable	128	25
✅ express-stable	128	25
✅ fastify-stable	128	25
✅ hono-stable	128	25
✅ nextjs-turbopack-canary	134	19
✅ nextjs-turbopack-stable	153	0
✅ nextjs-webpack-canary	134	19
✅ nextjs-webpack-stable	153	0
✅ nitro-stable	128	25
✅ nuxt-stable	128	25
✅ sveltekit-stable	147	6
✅ vite-stable	128	25

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	153	0	0

✅ 📋 Other

App	Passed	Skipped
✅ e2e-local-dev-nest-stable	128	25
✅ e2e-local-dev-tanstack-start-	128	25
✅ e2e-local-postgres-nest-stable	128	25
✅ e2e-local-postgres-tanstack-start-	128	25
✅ e2e-local-prod-nest-stable	128	25
✅ e2e-local-prod-tanstack-start-	128	25
✅ e2e-vercel-prod-tanstack-start	126	27

📋 View full workflow run

github-actions · 2026-07-09T03:15:13Z

📊 Workflow Benchmarks

commit 0873932 · Thu, 09 Jul 2026 16:38:12 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1219 (+22%)	1683 🔴	1828 🔴	1939 🔴	30
TTFS	hook + stream	1828 (+27%)	2163 🔴	2483 🔴	3126 🔴	30
STSO	1020 steps (1-20)	328 (+13%)	347 🔴	436 🔴	840 🔴	19
STSO	1020 steps (101-120)	494 (+16%)	553 🔴	696 🔴	707 🔴	19
STSO	1020 steps (1001-1020)	932 (+5.4%)	984 🔴	1096 🔴	1117 🔴	19
WO	stream	1219 (+22%)	1683	1828	1939	30
WO	hook + stream	1828 (+27%)	2163	2483	3126	30
SL	stream	4703 (-2.4%)	5602 🔴	5696 🔴	5775 🔴	30
SL	hook + stream	4412 (-9.4%)	5089 🔴	5320 🔴	5422 🔴	30

📜 Previous results (1)

`f707a18`

Thu, 09 Jul 2026 03:35:18 GMT · run logs

vercel / nextjs-turbopack

Metric	Scenario	Avg (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	stream	1287	1624 🔴	1639 🔴	1672 🔴	30
TTFS	hook + stream	1409	1865 🔴	1938 🔴	2169 🔴	30
STSO	1020 steps (1-20)	299	313 🔴	476 🔴	762 🔴	19
STSO	1020 steps (101-120)	438	482 🔴	686 🔴	713 🔴	19
STSO	1020 steps (1001-1020)	860	943 🔴	952 🔴	1031 🔴	19
WO	stream	1287	1624	1639	1672	30
WO	hook + stream	1409	1865	1938	2169	30
SL	stream	4671	5467 🔴	5695 🔴	5943 🔴	30
SL	hook + stream	5159	5623 🔴	5704 🔴	5764 🔴	30

_{Avg deltas compare against the most recent benchmark run on main at the time of this run.}

_{Metrics — TTFS: time to first step body execution · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (time outside step bodies, client start → last step body exit) · SL: stream latency (first chunk write → visible to the reader)}

_{Scenarios — stream: one step that streams chunks back to the client; no hooks, so the run stays in turbo mode · hook + stream: registers a hook before the same streaming step, which exits turbo mode · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges}

_{🟢/🔴 mark percentiles within/above target. Targets (p75/p90/p99, ms) — TTFS 200/300/600 · SL 50/60/125 · STSO (1-20) 20/30/60 · STSO (101-120) 30/45/90 · STSO (1001-1020) 40/60/120}

_{TTFS/WO compare client vs deployment clocks and SL compares the step runner’s clock vs the client’s (NTP-synced in CI). WO ends at the last step body exit, the closest observable proxy for the final step-completion request.}

github-actions · 2026-07-09T18:38:55Z

No backport to stable for f28150c (AI decision).

This commit extends the STSO/TTFS step-latency telemetry feature, which is main-only: packages/core/src/runtime/step-latency.ts does not exist on stable, and neither world/src/events.ts nor world-vercel/src/events-v4.ts on stable contain any stso/ttfs fields for this change to build on. Backporting the new stepCount/eventCount progress counters would fail without first backporting the entire underlying latency telemetry infrastructure.

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

f28150c62667f069dbe3c47e83102fef499ab92b

feat: report STSO step progress
f707a18

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karthikscale3 requested review from a team and ijjk as code owners July 9, 2026 03:16

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fix: report step and event counts
0873932

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VaguelySerious approved these changes Jul 9, 2026
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karthikscale3 merged commit f28150c into mainJul 9, 2026
170 of 172 checks passed

karthikscale3 deleted the kk/stso-progress-telemetry branch July 9, 2026 18:38

This was referenced Jul 9, 2026
Version Packages (beta) #2859
Merged
Version Packages (beta) Jokacar10/jkworkflow#391
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Version Packages (beta) ben-vargas/workflow#104
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Version Packages (beta) Thegreatsura/workflow#1
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