fix(core): lazy-load built-in worlds in runtime

[ijjk]

Summary

• lazy-load the built-in local and vercel world modules instead of statically importing them
• stop using a top-level project-root createRequire in core runtime world loading
• preserve custom world fallback resolution while keeping eager Next.js step routes out of world implementation graphs

Validation

• WORKFLOW_NEXT_LAZY_DISCOVERY=0 APP_NAME=nextjs-turbopack pnpm vitest run packages/core/e2e/local-build.test.ts
• WORKFLOW_NEXT_LAZY_DISCOVERY=0 APP_NAME=nextjs-webpack pnpm vitest run packages/core/e2e/local-build.test.ts

Stacked on #1747.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, Comment	Apr 16, 2026 6:05am
example-nextjs-workflow-webpack	Ready	Preview, Comment	Apr 16, 2026 6:05am
example-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-astro-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-express-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-fastify-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-hono-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-nitro-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-nuxt-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-sveltekit-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workbench-vite-workflow	Ready	Preview, Comment	Apr 16, 2026 6:05am
workflow-swc-playground	Ready	Preview, Comment	Apr 16, 2026 6:05am
workflow-web	Ready	Preview, Comment	Apr 16, 2026 6:05am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
workflow-docs	Skipped		Apr 16, 2026 6:05am

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Latest commit: 1cedeaa

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[github-actions]

🧪 E2E Test Results

❌ Some tests failed

Summary

	Passed	Failed	Skipped	Total
✅ 💻 Local Development	1062	0	198	1260
✅ 📦 Local Production	1062	0	198	1260
✅ 🐘 Local Postgres	1062	0	198	1260
❌ 🪟 Windows	62	20	8	90
❌ 🌍 Community Worlds	133	74	24	231
✅ 📋 Other	228	0	42	270
Total	3609	94	668	4371

❌ Failed Tests

🪟 Windows (20 failed)

nextjs-turbopack (20 failed):

• DurableAgent e2e core basic text response
• DurableAgent e2e core single tool call
• DurableAgent e2e core multiple sequential tool calls
• DurableAgent e2e core tool error recovery
• DurableAgent e2e provider tools provider tool identity preserved across step boundaries
• DurableAgent e2e provider tools mixed provider and function tools
• DurableAgent e2e onStepFinish fires constructor + stream callbacks in order with step data
• DurableAgent e2e onFinish fires constructor + stream callbacks in order with event data
• DurableAgent e2e instructions string instructions are passed to the model
• DurableAgent e2e timeout completes within timeout
• DurableAgent e2e experimental_onStart (GAP) completes but callbacks are not called (GAP)
• DurableAgent e2e experimental_onStepStart (GAP) completes but callbacks are not called (GAP)
• DurableAgent e2e experimental_onToolCallStart (GAP) completes but callbacks are not called (GAP)
• DurableAgent e2e experimental_onToolCallFinish (GAP) completes but callbacks are not called (GAP)
• DurableAgent e2e prepareCall (GAP) completes but prepareCall is not applied (GAP)
• DurableAgent e2e prepareStep on constructor agent-level prepareStep is called for each LLM step
• DurableAgent e2e prepareStep on constructor stream-level prepareStep overrides constructor-level
• DurableAgent e2e multimodal tool results passes through LanguageModelV3ToolResultOutput from tools
• DurableAgent e2e tool approval (GAP) completes but needsApproval is not checked (GAP)
• fetchWorkflow

🌍 Community Worlds (74 failed)

mongodb (7 failed):

• hookWorkflow is not resumable via public webhook endpoint
• webhookWorkflow
• fetchWorkflow
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• health check (queue-based) - workflow and step endpoints respond to health check messages
• health check (CLI) - workflow health command reports healthy endpoints
• resilient start: addTenWorkflow completes when run_created returns 500

redis (7 failed):

• hookWorkflow is not resumable via public webhook endpoint
• webhookWorkflow
• fetchWorkflow
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• health check (queue-based) - workflow and step endpoints respond to health check messages
• health check (CLI) - workflow health command reports healthy endpoints
• resilient start: addTenWorkflow completes when run_created returns 500

turso (60 failed):

• addTenWorkflow
• addTenWorkflow
• wellKnownAgentWorkflow (.well-known/agent)
• should work with react rendering in step
• promiseAllWorkflow
• promiseRaceWorkflow
• promiseAnyWorkflow
• importedStepOnlyWorkflow
• hookWorkflow
• hookWorkflow is not resumable via public webhook endpoint
• webhookWorkflow
• sleepingWorkflow
• parallelSleepWorkflow
• nullByteWorkflow
• workflowAndStepMetadataWorkflow
• 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()
• error handling not registered WorkflowNotRegisteredError fails the run when workflow does not exist
• error handling not registered StepNotRegisteredError fails the step but workflow can catch it
• error handling not registered StepNotRegisteredError fails the run when not caught in workflow
• hookCleanupTestWorkflow - hook token reuse after workflow completion
• concurrent hook token conflict - two workflows cannot use the same hook token simultaneously
• hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running
• 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
• runClassSerializationWorkflow - Run instances serialize across workflow/step boundaries
• health check (queue-based) - workflow and step endpoints respond to health check messages
• 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
• stepFunctionAsStartArgWorkflow - step function reference passed as start() argument
• cancelRun - cancelling a running workflow
• cancelRun via CLI - cancelling a running workflow
• pages router addTenWorkflow via pages router
• pages router promiseAllWorkflow via pages router
• pages router sleepingWorkflow via pages router
• hookWithSleepWorkflow - hook payloads delivered correctly with concurrent sleep
• sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration
• sleepWithSequentialStepsWorkflow - sequential steps work with concurrent sleep (control)
• importMetaUrlWorkflow - import.meta.url is available in step bundles
• metadataFromHelperWorkflow - getWorkflowMetadata/getStepMetadata work from module-level helper (#1577)
• resilient start: addTenWorkflow completes when run_created returns 500
• getterStepWorkflow - getter functions with "use step" directive

Details by Category

✅ 💻 Local Development

App	Passed	Failed	Skipped
✅ astro-stable	76	0	14
✅ express-stable	76	0	14
✅ fastify-stable	76	0	14
✅ hono-stable	76	0	14
✅ nextjs-turbopack-canary	63	0	27
✅ nextjs-turbopack-stable-lazy-discovery-disabled	82	0	8
✅ nextjs-turbopack-stable-lazy-discovery-enabled	82	0	8
✅ nextjs-webpack-canary	63	0	27
✅ nextjs-webpack-stable-lazy-discovery-disabled	82	0	8
✅ nextjs-webpack-stable-lazy-discovery-enabled	82	0	8
✅ nitro-stable	76	0	14
✅ nuxt-stable	76	0	14
✅ sveltekit-stable	76	0	14
✅ vite-stable	76	0	14

✅ 📦 Local Production

App	Passed	Failed	Skipped
✅ astro-stable	76	0	14
✅ express-stable	76	0	14
✅ fastify-stable	76	0	14
✅ hono-stable	76	0	14
✅ nextjs-turbopack-canary	63	0	27
✅ nextjs-turbopack-stable-lazy-discovery-disabled	82	0	8
✅ nextjs-turbopack-stable-lazy-discovery-enabled	82	0	8
✅ nextjs-webpack-canary	63	0	27
✅ nextjs-webpack-stable-lazy-discovery-disabled	82	0	8
✅ nextjs-webpack-stable-lazy-discovery-enabled	82	0	8
✅ nitro-stable	76	0	14
✅ nuxt-stable	76	0	14
✅ sveltekit-stable	76	0	14
✅ vite-stable	76	0	14

✅ 🐘 Local Postgres

App	Passed	Failed	Skipped
✅ astro-stable	76	0	14
✅ express-stable	76	0	14
✅ fastify-stable	76	0	14
✅ hono-stable	76	0	14
✅ nextjs-turbopack-canary	63	0	27
✅ nextjs-turbopack-stable-lazy-discovery-disabled	82	0	8
✅ nextjs-turbopack-stable-lazy-discovery-enabled	82	0	8
✅ nextjs-webpack-canary	63	0	27
✅ nextjs-webpack-stable-lazy-discovery-disabled	82	0	8
✅ nextjs-webpack-stable-lazy-discovery-enabled	82	0	8
✅ nitro-stable	76	0	14
✅ nuxt-stable	76	0	14
✅ sveltekit-stable	76	0	14
✅ vite-stable	76	0	14

❌ 🪟 Windows

App	Passed	Failed	Skipped
❌ nextjs-turbopack	62	20	8

❌ 🌍 Community Worlds

App	Passed	Failed	Skipped
✅ mongodb-dev	6	0	0
❌ mongodb	56	7	8
✅ redis-dev	6	0	0
❌ redis	56	7	8
✅ turso-dev	6	0	0
❌ turso	3	60	8

✅ 📋 Other

App	Passed	Failed	Skipped
✅ e2e-local-dev-nest-stable	76	0	14
✅ e2e-local-postgres-nest-stable	76	0	14
✅ e2e-local-prod-nest-stable	76	0	14

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📋 View full workflow run

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❌ Some E2E test jobs failed:

• Vercel Prod: cancelled
• Local Dev: success
• Local Prod: success
• Local Postgres: success
• Windows: failure

Check the workflow run for details.