Consolidate console logging to structured logger utility

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

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[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

---

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

---

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

---

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

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[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

---

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

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[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

---

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

---

📋 View full workflow run

[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

---

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good

[pranaygp]

Summary

• Replace all console.log, console.warn, and console.error calls in packages/core/src with the structured logger utility from logger.ts
• Fix logger to always output error/warn to console - Previously errors were silently swallowed unless DEBUG env var was set
• Fix log levels - Downgrade warnings that are really info (expected states), downgrade errors that are really warnings (transient failures with retry)
• Remove verbose debug logs from hot paths (events-consumer)

Log Level Changes

Message	Before	After	Reason
OpenTelemetry not available	warn	info	Expected in many environments
Workflow already completed, skipping	warn	info	Normal state
Step/wait already exists, continuing	warn	info	Idempotency case
Workflow run already completed, skipping step/hook	warn	info	Race condition, normal
Step invoked erroneously	error	warn	Handled gracefully
Encountered Error, step will be retried	error	warn	Transient, will retry
Encountered RetryableError	warn	warn	Unchanged (correct)
Step exceeded max retries	error	error	Unchanged (correct)
FatalError in step	error	error	Unchanged (correct)
Error while running workflow	error	error	Unchanged (correct)

Test plan

• Build passes (pnpm build in packages/core)
• All 304 tests pass (pnpm test in packages/core)
• Verified error/warn logs now output to console with [Workflow] prefix
• Verified no remaining raw console. calls in source files (only logger.ts and JSDoc examples)

🤖 Generated with Claude Code

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-nextjs-workflow-webpack	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
example-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-astro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-express-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-fastify-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-hono-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nitro-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-nuxt-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-sveltekit-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workbench-vite-workflow	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-docs	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-nest	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm
workflow-swc-playground	Ready	Preview, Comment, Open in v0	Feb 4, 2026 10:18pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 7c9d7c9

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

This PR includes changesets to release 15 packages

Name	Type
@workflow/core	Patch
@workflow/builders	Patch
@workflow/cli	Patch
@workflow/docs-typecheck	Patch
@workflow/next	Patch
@workflow/nitro	Patch
@workflow/web-shared	Patch
workflow	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch

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

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

[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ ▲ Vercel Production	479	0	38	517
✅ 💻 Local Development	438	0	32	470
✅ 📦 Local Production	438	0	32	470
✅ 🐘 Local Postgres	438	0	32	470
✅ 🪟 Windows	47	0	0	47
❌ 🌍 Community Worlds	31	169	0	200
✅ 📋 Other	129	0	12	141
Total	2000	169	146	2315

❌ Failed Tests

🌍 Community Worlds (169 failed)

mongodb (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

redis (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

starter (43 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• health check (CLI) - workflow health command reports healthy endpoints
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

turso (42 failed):

• addTenWorkflow
• addTenWorkflow
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• readableStreamWorkflow
• hookWorkflow
• webhookWorkflow
• sleepingWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• outputStreamWorkflow
• outputStreamInsideStepWorkflow - getWritable() called inside step functions
• fetchWorkflow
• promiseRaceStressTestWorkflow
• error handling error propagation workflow errors nested function calls preserve message and stack trace
• error handling error propagation workflow errors cross-file imports preserve message and stack trace
• error handling error propagation step errors basic step error preserves message and stack trace
• error handling error propagation step errors cross-file step error preserves message and function names in stack
• error handling retry behavior regular Error retries until success
• error handling retry behavior FatalError fails immediately without retries
• error handling retry behavior RetryableError respects custom retryAfter delay
• error handling retry behavior maxRetries=0 disables retries
• error handling catchability FatalError can be caught and detected with FatalError.is()
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• stepFunctionPassingWorkflow - step function references can be passed as arguments (without closure vars)
• stepFunctionWithClosureWorkflow - step function with closure variables passed as argument
• closureVariableWorkflow - nested step functions with closure variables
• spawnWorkflowFromStepWorkflow - spawning a child workflow using start() inside a step
• pathsAliasWorkflow - TypeScript path aliases resolve correctly
• Calculator.calculate - static workflow method using static step methods from another class
• AllInOneService.processNumber - static workflow method using sibling static step methods
• ChainableService.processWithThis - static step methods using this to reference the class
• thisSerializationWorkflow - step function invoked with .call() and .apply()
• customSerializationWorkflow - custom class serialization with WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE
• instanceMethodStepWorkflow - instance methods with "use step" directive
• crossContextSerdeWorkflow - classes defined in step code are deserializable in workflow context
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router

Details by Category

✅ ▲ Vercel Production

App	Passed	Failed	Skipped
✅ astro	43	0	4
✅ example	43	0	4
✅ express	43	0	4
✅ fastify	43	0	4
✅ hono	43	0	4
✅ nextjs-turbopack	46	0	1
✅ nextjs-webpack	46	0	1
✅ nitro	43	0	4
✅ nuxt	43	0	4
✅ sveltekit	43	0	4
✅ vite	43	0	4

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	43	0	4
✅ express-stable	43	0	4
✅ fastify-stable	43	0	4
✅ hono-stable	43	0	4
✅ nextjs-turbopack-stable	47	0	0
✅ nextjs-webpack-stable	47	0	0
✅ nitro-stable	43	0	4
✅ nuxt-stable	43	0	4
✅ sveltekit-stable	43	0	4
✅ vite-stable	43	0	4

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack	47	0	0

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	3	0	0
❌ mongodb	5	42	0
✅ redis-dev	3	0	0
❌ redis	5	42	0
✅ starter-dev	3	0	0
❌ starter	4	43	0
✅ turso-dev	3	0	0
❌ turso	5	42	0

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	43	0	4
✅ e2e-local-postgres-nest-stable	43	0	4
✅ e2e-local-prod-nest-stable	43	0	4

---

📋 View full workflow run

[github-actions]

📊 Benchmark Results

📈 Comparing against baseline from main branch. Green 🟢 = faster, Red 🔺 = slower.

workflow with no steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.032s (-29.6% 🟢)	1.018s (~)	0.987s	10	1.00x
💻 Local	Express	0.043s (-3.6%)	1.008s (~)	0.965s	10	1.36x
💻 Local	Nitro	0.044s (+2.8%)	1.008s (~)	0.964s	10	1.38x
🐘 Postgres	Nitro	0.196s (-7.8% 🟢)	1.015s (~)	0.818s	10	6.19x
🐘 Postgres	Express	0.233s (-4.4%)	1.013s (~)	0.780s	10	7.36x
🐘 Postgres	Next.js (Turbopack)	0.269s (-29.4% 🟢)	1.030s (+0.8%)	0.762s	10	8.47x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	0.780s (-0.9%)	1.602s (-7.1% 🟢)	0.822s	10	1.00x
▲ Vercel	Nitro	0.790s (+10.1% 🔺)	1.614s (-8.3% 🟢)	0.824s	10	1.01x
▲ Vercel	Next.js (Turbopack)	1.223s (+42.2% 🔺)	2.240s (+27.7% 🔺)	1.017s	10	1.57x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

workflow with 1 step

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.087s (~)	2.012s (~)	0.924s	10	1.00x
💻 Local	Nitro	1.114s (~)	2.008s (~)	0.893s	10	1.02x
💻 Local	Express	1.119s (~)	2.007s (~)	0.888s	10	1.03x
🐘 Postgres	Next.js (Turbopack)	1.837s (-1.6%)	2.016s (-4.7%)	0.179s	10	1.69x
🐘 Postgres	Express	2.189s (-1.7%)	3.015s (~)	0.826s	10	2.01x
🐘 Postgres	Nitro	2.336s (-4.2%)	3.016s (~)	0.680s	10	2.15x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.941s (-5.2% 🟢)	3.807s (-1.5%)	0.867s	10	1.00x
▲ Vercel	Express	2.945s (+2.4%)	3.802s (+1.8%)	0.857s	10	1.00x
▲ Vercel	Nitro	2.948s (-2.3%)	3.697s (-3.7%)	0.749s	10	1.00x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

workflow with 10 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	10.569s (-1.3%)	11.018s (~)	0.449s	3	1.00x
💻 Local	Nitro	10.818s (~)	11.014s (~)	0.195s	3	1.02x
💻 Local	Express	10.833s (~)	11.014s (~)	0.181s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	14.537s (-2.7%)	15.035s (-3.1%)	0.498s	2	1.38x
🐘 Postgres	Nitro	20.441s (+0.6%)	21.036s (~)	0.595s	2	1.93x
🐘 Postgres	Express	20.505s (~)	21.033s (~)	0.529s	2	1.94x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	22.599s (-3.3%)	23.253s (-3.5%)	0.654s	2	1.00x
▲ Vercel	Next.js (Turbopack)	23.230s (-2.4%)	23.890s (-2.6%)	0.660s	2	1.03x
▲ Vercel	Nitro	23.816s (-1.8%)	25.024s (-0.7%)	1.208s	2	1.05x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

workflow with 25 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	26.858s (-1.4%)	27.026s (-3.6%)	0.168s	3	1.00x
💻 Local	Nitro	27.447s (~)	28.028s (~)	0.581s	3	1.02x
💻 Local	Express	27.484s (~)	28.026s (~)	0.543s	3	1.02x
🐘 Postgres	Next.js (Turbopack)	34.968s (-5.1% 🟢)	35.557s (-5.4% 🟢)	0.589s	2	1.30x
🐘 Postgres	Nitro	50.310s (~)	51.087s (~)	0.776s	2	1.87x
🐘 Postgres	Express	50.411s (~)	51.065s (~)	0.653s	2	1.88x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	56.506s (-5.0% 🟢)	57.646s (-4.2%)	1.140s	2	1.00x
▲ Vercel	Nitro	57.748s (-3.2%)	58.636s (-3.2%)	0.888s	2	1.02x
▲ Vercel	Express	58.274s (-3.4%)	59.239s (-3.2%)	0.965s	2	1.03x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

workflow with 50 sequential steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	55.651s (-1.7%)	56.040s (-1.8%)	0.388s	2	1.00x
💻 Local	Nitro	57.103s (~)	58.037s (~)	0.933s	2	1.03x
💻 Local	Express	57.194s (~)	58.045s (~)	0.851s	2	1.03x
🐘 Postgres	Next.js (Turbopack)	69.502s (-6.0% 🟢)	69.603s (-6.1% 🟢)	0.101s	2	1.25x
🐘 Postgres	Nitro	100.122s (~)	100.146s (-1.0%)	0.024s	1	1.80x
🐘 Postgres	Express	100.229s (~)	101.134s (~)	0.905s	1	1.80x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	119.676s (-2.4%)	120.574s (-2.2%)	0.898s	1	1.00x
▲ Vercel	Nitro	119.902s (~)	120.679s (~)	0.777s	1	1.00x
▲ Vercel	Next.js (Turbopack)	120.556s (-0.7%)	121.248s (-1.1%)	0.692s	1	1.01x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.all with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.364s (-1.6%)	2.011s (~)	0.647s	15	1.00x
💻 Local	Express	1.401s (-1.9%)	2.006s (~)	0.605s	15	1.03x
💻 Local	Nitro	1.403s (-1.0%)	2.006s (~)	0.603s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	2.038s (~)	2.533s (-2.8%)	0.495s	12	1.49x
🐘 Postgres	Nitro	2.267s (-2.7%)	3.014s (~)	0.747s	10	1.66x
🐘 Postgres	Express	2.334s (~)	2.685s (-11.0% 🟢)	0.351s	12	1.71x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.989s (-3.7%)	3.835s (+0.9%)	0.846s	8	1.00x
▲ Vercel	Nitro	3.009s (~)	3.904s (-0.9%)	0.895s	8	1.01x
▲ Vercel	Express	3.147s (+9.9% 🔺)	4.019s (+4.7%)	0.873s	8	1.05x

🔍 Observability: Next.js (Turbopack) | Nitro | Express

Promise.all with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.292s (-8.9% 🟢)	3.231s (+5.9% 🔺)	0.939s	10	1.00x
💻 Local	Nitro	2.539s (-1.0%)	3.015s (~)	0.476s	10	1.11x
💻 Local	Express	2.572s (-0.9%)	3.017s (~)	0.445s	10	1.12x
🐘 Postgres	Nitro	8.459s (+2.5%)	9.049s (~)	0.591s	4	3.69x
🐘 Postgres	Express	10.865s (+13.7% 🔺)	11.021s (+5.8% 🔺)	0.156s	3	4.74x
🐘 Postgres	Next.js (Turbopack)	11.642s (-7.0% 🟢)	12.358s (-2.6%)	0.715s	3	5.08x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.197s (-9.6% 🟢)	3.961s (-8.4% 🟢)	0.764s	8	1.00x
▲ Vercel	Express	3.855s (+17.9% 🔺)	4.735s (+13.9% 🔺)	0.880s	7	1.21x
▲ Vercel	Next.js (Turbopack)	3.867s (+10.6% 🔺)	4.487s (+5.4% 🔺)	0.620s	7	1.21x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Promise.all with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	5.573s (-19.8% 🟢)	6.415s (-20.8% 🟢)	0.842s	5	1.00x
💻 Local	Nitro	7.111s (-2.7%)	7.889s (-2.2%)	0.778s	4	1.28x
💻 Local	Express	7.505s (~)	8.438s (-0.7%)	0.933s	4	1.35x
🐘 Postgres	Express	49.315s (+9.3% 🔺)	50.147s (+10.6% 🔺)	0.832s	1	8.85x
🐘 Postgres	Nitro	52.542s (+8.7% 🔺)	53.172s (+8.1% 🔺)	0.630s	1	9.43x
🐘 Postgres	Next.js (Turbopack)	57.286s (+10.4% 🔺)	58.143s (+11.5% 🔺)	0.857s	1	10.28x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	4.560s (+32.0% 🔺)	5.288s (+30.4% 🔺)	0.728s	7	1.00x
▲ Vercel	Next.js (Turbopack)	5.302s (+52.3% 🔺)	6.208s (+42.6% 🔺)	0.906s	5	1.16x
▲ Vercel	Nitro	5.705s (+73.2% 🔺)	6.590s (+70.2% 🔺)	0.885s	6	1.25x

🔍 Observability: Express | Next.js (Turbopack) | Nitro

Promise.race with 10 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	1.393s (-1.7%)	2.010s (~)	0.617s	15	1.00x
💻 Local	Nitro	1.425s (-0.5%)	2.007s (~)	0.582s	15	1.02x
💻 Local	Express	1.432s (-1.1%)	2.007s (~)	0.575s	15	1.03x
🐘 Postgres	Next.js (Turbopack)	1.859s (-14.2% 🟢)	2.085s (-17.3% 🟢)	0.226s	15	1.33x
🐘 Postgres	Express	1.959s (-6.2% 🟢)	2.476s (-5.0% 🟢)	0.518s	13	1.41x
🐘 Postgres	Nitro	2.151s (+8.8% 🔺)	2.695s (+25.7% 🔺)	0.544s	12	1.54x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Express	2.829s (~)	3.637s (-4.1%)	0.808s	9	1.00x
▲ Vercel	Nitro	2.830s (~)	3.702s (-1.7%)	0.872s	9	1.00x
▲ Vercel	Next.js (Turbopack)	2.918s (~)	3.780s (~)	0.863s	8	1.03x

🔍 Observability: Express | Nitro | Next.js (Turbopack)

Promise.race with 25 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	2.453s (-7.2% 🟢)	3.254s (+7.4% 🔺)	0.801s	10	1.00x
💻 Local	Express	2.659s (-1.5%)	3.012s (~)	0.353s	10	1.08x
💻 Local	Nitro	2.678s (-3.3%)	3.011s (~)	0.333s	10	1.09x
🐘 Postgres	Express	11.178s (+2.5%)	11.692s (~)	0.514s	3	4.56x
🐘 Postgres	Next.js (Turbopack)	11.590s (-8.6% 🟢)	12.362s (-7.6% 🟢)	0.771s	3	4.73x
🐘 Postgres	Nitro	13.220s (+27.1% 🔺)	13.698s (+24.2% 🔺)	0.479s	3	5.39x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Next.js (Turbopack)	2.976s (-4.2%)	3.760s (-3.1%)	0.785s	9	1.00x
▲ Vercel	Express	3.011s (-1.6%)	3.824s (+0.8%)	0.814s	8	1.01x
▲ Vercel	Nitro	3.083s (~)	3.811s (-1.6%)	0.728s	8	1.04x

🔍 Observability: Next.js (Turbopack) | Express | Nitro

Promise.race with 50 concurrent steps

💻 Local Development

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	6.822s (-8.0% 🟢)	7.537s (-10.0% 🟢)	0.715s	5	1.00x
💻 Local	Nitro	7.715s (~)	8.720s (~)	1.005s	4	1.13x
💻 Local	Express	7.835s (-2.4%)	8.795s (-1.7%)	0.960s	4	1.15x
🐘 Postgres	Express	51.962s (+8.9% 🔺)	52.328s (+8.4% 🔺)	0.366s	1	7.62x
🐘 Postgres	Nitro	52.639s (+4.0%)	53.111s (+3.4%)	0.472s	1	7.72x
🐘 Postgres	Next.js (Turbopack)	56.380s (-2.0%)	57.132s (-1.8%)	0.752s	1	8.26x

▲ Production (Vercel)

World	Framework	Workflow Time	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	3.445s (+6.8% 🔺)	4.213s (+8.9% 🔺)	0.768s	8	1.00x
▲ Vercel	Next.js (Turbopack)	3.478s (-11.4% 🟢)	4.287s (-7.9% 🟢)	0.809s	7	1.01x
▲ Vercel	Express	3.930s (+12.9% 🔺)	4.365s (+5.4% 🔺)	0.435s	7	1.14x

🔍 Observability: Nitro | Next.js (Turbopack) | Express

Stream Benchmarks(includes TTFB metrics)

workflow with stream

💻 Local Development

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
💻 Local	🥇 Next.js (Turbopack)	0.117s (-18.7% 🟢)	1.003s (~)	0.013s (-20.2% 🟢)	1.025s (~)	0.908s	10	1.00x
💻 Local	Nitro	0.180s (-1.6%)	0.992s (~)	0.014s (-2.9%)	1.020s (~)	0.840s	10	1.54x
💻 Local	Express	0.187s (~)	0.992s (~)	0.015s (-6.5% 🟢)	1.022s (~)	0.834s	10	1.60x
🐘 Postgres	Next.js (Turbopack)	0.614s (-7.7% 🟢)	0.928s (-4.3%)	0.000s (+Infinity% 🔺)	1.016s (~)	0.402s	10	5.24x
🐘 Postgres	Express	1.438s (-40.2% 🟢)	1.602s (-39.4% 🟢)	0.000s (+Infinity% 🔺)	2.013s (-33.3% 🟢)	0.575s	10	12.27x
🐘 Postgres	Nitro	2.331s (+5.3% 🔺)	2.712s (-4.1%)	0.000s (~)	3.016s (~)	0.685s	10	19.89x

▲ Production (Vercel)

World	Framework	Workflow Time	TTFB	Slurp	Wall Time	Overhead	Samples	vs Fastest
▲ Vercel	🥇 Nitro	2.890s (-6.3% 🟢)	3.228s (-6.3% 🟢)	0.149s (+8.6% 🔺)	3.892s (-5.7% 🟢)	1.003s	10	1.00x
▲ Vercel	Express	2.986s (-3.8%)	3.238s (-2.2%)	0.182s (-4.5%)	3.887s (-3.4%)	0.901s	10	1.03x
▲ Vercel	Next.js (Turbopack)	3.076s (-1.4%)	3.214s (-0.8%)	0.217s (+45.1% 🔺)	3.942s (+1.5%)	0.866s	10	1.06x

🔍 Observability: Nitro | Express | Next.js (Turbopack)

Summary

Fastest Framework by World

Winner determined by most benchmark wins

World	🥇 Fastest Framework	Wins
💻 Local	Next.js (Turbopack)	12/12
🐘 Postgres	Next.js (Turbopack)	7/12
▲ Vercel	Express	5/12

Fastest World by Framework

Winner determined by most benchmark wins

Framework	🥇 Fastest World	Wins
Express	💻 Local	10/12
Next.js (Turbopack)	💻 Local	10/12
Nitro	💻 Local	10/12

Column Definitions

• Workflow Time: Runtime reported by workflow (completedAt - createdAt) - primary metric
• TTFB: Time to First Byte - time from workflow start until first stream byte received (stream benchmarks only)
• Slurp: Time from first byte to complete stream consumption (stream benchmarks only)
• Wall Time: Total testbench time (trigger workflow + poll for result)
• Overhead: Testbench overhead (Wall Time - Workflow Time)
• Samples: Number of benchmark iterations run
• vs Fastest: How much slower compared to the fastest configuration for this benchmark

Worlds:

• 💻 Local: In-memory filesystem world (local development)
• 🐘 Postgres: PostgreSQL database world (local development)
• ▲ Vercel: Vercel production/preview deployment
• 🌐 Starter: Community world (local development)
• 🌐 Turso: Community world (local development)
• 🌐 MongoDB: Community world (local development)
• 🌐 Redis: Community world (local development)
• 🌐 Jazz: Community world (local development)

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[Copilot]

Pull request overview

This PR consolidates all console logging calls in packages/core/src to use a structured logger utility built on the debug library with OpenTelemetry integration. This provides consistent, filterable logging and removes duplicate logging patterns.

Changes:

• Replaced all console.log, console.warn, and console.error calls with structured loggers (runtimeLogger, stepLogger) that accept structured metadata
• Removed duplicate logging where both eventsLogger and console.error were called for the same event
• Updated test expectations to remove console spy mocking since logging is now handled by the structured logger

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/telemetry.ts	Replaced console.warn with runtimeLogger.warn for OpenTelemetry unavailable warning
packages/core/src/serialization.ts	Replaced console.error calls with runtimeLogger.error, adding structured metadata for serialization failures
packages/core/src/runtime/suspension-handler.ts	Replaced console.warn calls with runtimeLogger.warn, adding structured context including workflowRunId and correlationId
packages/core/src/runtime/step-handler.ts	Replaced console.error/warn calls with stepLogger equivalents, converting formatted error stack strings to structured metadata
packages/core/src/runtime.ts	Replaced console.warn/error calls with runtimeLogger equivalents, adding structured metadata for workflow status and errors
packages/core/src/observability.ts	Replaced console.error with runtimeLogger.error for event data hydration errors
packages/core/src/events-consumer.ts	Removed duplicate console.error call, keeping only eventsLogger.error for callback errors
packages/core/src/events-consumer.test.ts	Removed console.error spy test code that is no longer needed since duplicate logging was removed

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[VaguelySerious]

LGTM. I also would love if the logger eventually moved to utils and then cli could use it too, among other packages, so that we eventually have a unified way of setting debug log level

[karthikscale3]

tested and looks good