Commit Graph

230 Commits

Author SHA1 Message Date
Peter Wielander eb976db35b [core] Forward-port stream reconnect to getReadable level (#2318) 2026-06-10 20:41:20 +02:00
Pranay Prakash ccd37e9a59 Handle lazy stream key request failures (#2257)
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
2026-06-08 12:01:39 -07:00
Peter Wielander 0fd0891cc4 [core] Preserve event-log order in hook-vs-sleep replay races (#2171) (#2185)
Co-authored-by: Nathan Rajlich <n@n8.io>
2026-06-08 10:39:32 -07:00
Nathan Rajlich 8d75491a07 [core] Surface workflowCoreVersion from healthCheck() result (#1854)
Co-authored-by: Peter Wielander <peter.wielander@vercel.com>
2026-06-05 18:07:41 +02:00
Pranay Prakash 12c35b54eb fix(core): skip terminal event replay on main (#2215) 2026-06-02 13:04:22 -07:00
Pranay Prakash 52d63d1b61 fix(core): advance workflow clock only for consumed events (#2206) (#2211)
* fix(core): advance workflow clock only for consumed events

* test(core): hammer replay branch clock determinism

* fix(core): address consumed event replay review feedback

* test(core): bound replay regression concurrency

(cherry picked from commit 1e32d05758)
2026-06-01 23:49:39 -07:00
Pranay Prakash 2a3b11bcb4 Retry replay divergence before failing event logs (#2212)
(cherry picked from commit 813cd9a9de)
2026-06-02 08:48:00 +02:00
Pranay Prakash 8f68d3525c fix(core): resolve forwarded stream keys across deployments (#2191) 2026-06-01 18:38:38 +00:00
Pranay Prakash 1ee63b870a [core] Harden event pagination response parsing (#2180) (#2179)
Co-authored-by: Peter Wielander <mittgfu@gmail.com>
2026-05-31 10:48:21 +02:00
Peter Wielander b659ef7cb3 [test] Forward-port reused-sleep replay divergence test (#2172) 2026-05-30 21:28:30 +02:00
Nathan Rajlich 8d0928b2a2 fix(core,errors): classify SDK encryption failures as RUNTIME_ERROR (#2145)
* fix(core,errors): classify SDK encryption failures as RUNTIME_ERROR

SDK-level AES-GCM encrypt/decrypt failures are never the user's fault,
but the run-failure classifier was tagging them as USER_ERROR because
the native Web Crypto OperationError (most commonly raised by
AESCipherJob.onDone on GCM auth-tag mismatch) does not match any
RUNTIME_ERROR_CHECKS entry.

Introduce a new RuntimeDecryptionError (subclass of WorkflowRuntimeError)
that the encryption module throws when subtle.encrypt/subtle.decrypt
fails, with the original DOMException as cause plus diagnostic context
(operation, byteLength, printable/hex format prefix of the input
header). classifyRunError now picks it up via RUNTIME_ERROR_CHECKS, so
these failures surface as RUNTIME_ERROR with a proper named class for
dashboards and triage.

* Trim changeset description to one sentence

* Trim historical-context comments

* docs: add runtime-decryption-failed troubleshooting page (v4 + v5)

* fix(core): round-trip RuntimeDecryptionError context, fix formatPrefix, propagate through serialization wrappers

Addresses review feedback on #2145:

- Add a RuntimeDecryptionError reducer/reviver (+ SerializableSpecial
  entry + globalThis registration) so its `context` (operation,
  byteLength, formatPrefix) survives the dehydrate/hydrate run-error
  round trip instead of being dropped by the generic Error reducer.

- Stop capturing `formatPrefix` in the low-level encryption layer, which
  only sees the stripped AES payload (nonce bytes), not the outer `encr`
  marker. The serialization layer now attaches the real envelope prefix.

- Rethrow RuntimeDecryptionError unchanged from the serialize/dehydrate
  catch blocks instead of reframing it as a SerializationError, so an
  encryption failure during dehydration stays a RUNTIME_ERROR rather than
  being misclassified as USER_ERROR.

* fix(core): enrich stream decrypt errors with envelope prefix + fix lint

- Mirror the catch/enrich/rethrow block from serialization/encryption.ts
  around the stream-path aesGcmDecrypt() call so auth-tag failures on
  encrypted stream frames also carry context.formatPrefix = 'encr'
  (addresses review feedback). Add a tampered-frame test.
- Fix all auto-fixable Biome lint findings in the touched files
  (template literals, useless try/catch wrappers, optional chaining,
  non-null assertions).
2026-05-29 18:53:17 +00:00
Peter Wielander 409b1033d9 Allow setting workflow attributes from steps (#2157) 2026-05-29 19:38:10 +02:00
Pranay Prakash 4b5f017635 fix: stabilize abort signal E2E cancellation paths (#2150)
* fix: stabilize abort signal e2e cancellation paths

* fix(core): tolerate duplicate durable abort receipts
2026-05-29 01:29:32 +00:00
Pranay Prakash ae37315cb7 Handle failed stream writes without unhandled rejections (#2142) 2026-05-28 23:33:07 +00:00
Peter Wielander 1e6b1fdea2 Attributes MVP (experimental and write-only) and CI hardening (#2134)
* fix(core): scan inline sourcemaps during error remapping

* Attributes MVP (experimental and write-only) (#2088)
2026-05-28 18:06:46 +00:00
Nathan Rajlich 234412a9d7 [core] Add Promise.race([sleep, hook]) prefix determinism tests (#2125)
Translates the diagrammed pattern into 5 prefix-replay tests that run the
same workflow against progressively longer prefixes of a 5-event log
(hook_created, wait_created, hook_received A, wait_completed,
hook_received B). Each test asserts the consumer takes the same
deterministic path: suspending at the right intermediate point with the
right invocationsQueue state, or completing with race winners
[hookA, sleep]. The full-log test verifies that the trailing
hook_received B is consumed by the dangling race-2 hook awaiter without
producing an unconsumed-event error. Runs in both sync and async
deserialization modes via the existing defineTests harness.
2026-05-27 22:18:08 +00:00
Peter Wielander 2050656099 [core] Memoize getWritable() to fix chunk reordering when called repeatedly (#2086) 2026-05-23 09:52:22 +02:00
Peter Wielander 9454151b0e [core] Fix "event cursor missing after initial load" performance degradation due to clobbered cursor (#2056) 2026-05-22 09:12:21 +02:00
Nathan Rajlich 2a446af517 [core] Exclude inline step execution from replay timeout (#2013)
* [core] Exclude inline step execution from replay timeout

The v5 combined workflow+step handler wraps inline step bodies in the
same setTimeout(..., REPLAY_TIMEOUT_MS) guard that previously only
bounded the v4 'workflows' function's fast deterministic replay. As a
result, any workflow with a single step exceeding 240s hard-fails with
FatalError: Workflow replay exceeded maximum duration (240s) after 4
attempts — even though the step could legitimately run for the full
function maxDuration (up to 800s on Pro Fluid).

Replace the setTimeout guard with a per-invocation budget that only
accumulates non-step time. pauseReplayBudget() / resumeReplayBudget()
bracket each executeStep() call, and the loop checks the budget at
iteration boundaries. The retry-then-fail semantics from #1567 are
preserved verbatim for the pure-replay case.

Also adds a WORKFLOW_REPLAY_TIMEOUT_MS env var override (clamped to
30s..780s) so operators can adjust the bare-replay ceiling without
patching @workflow/core.

Fixes #2009.

* Address PR review feedback

- Extract budget bookkeeping into ReplayBudget class (replay-budget.ts)
  with sentinel-protected idempotent pause()/resume() to avoid
  double-counting in future refactors that nest step execution
- Restore VERCEL_URL gate around process.exit(1) so a long pure-replay
  in local dev/non-Vercel runtimes can't hard-kill the host process
- Warn (once per distinct raw value) when WORKFLOW_REPLAY_TIMEOUT_MS is
  clamped or rejected, so misconfiguration is observable
- Correct Hobby maxDuration comment (60s standard / 300s Fluid)
- Document budget-check responsiveness trade-off vs. old setTimeout
- Tighten describe-error test assertions to match the full new hint
- Shorten changeset description
- Add ReplayBudget unit tests (9) including 8-minute step regression
- Add warn-once tests for getReplayTimeoutMs (extended)

* Replace VERCEL_URL gate with World capability

Per review feedback, gating runtime behavior on process.env.VERCEL_URL
leaks deployment-environment concerns into @workflow/core. Replace the
check with a new optional capability on the World interface:
processExitTriggersQueueRedelivery (default false).

- @workflow/world: declare the new optional capability on World
- @workflow/world-vercel: set it to true (Vercel fails the function
  invocation on non-zero exit and VQS redelivers via fresh invocation)
- @workflow/core: handleReplayBudgetExhausted reads world.processExitTriggersQueueRedelivery
  instead of process.env.VERCEL_URL; behavior is otherwise unchanged
- Add 4 unit tests for handleReplayBudgetExhausted covering both branches
  (exit-for-redelivery and best-effort run_failed)

---------

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
2026-05-22 00:32:36 +00:00
Nathan Rajlich 49da6c50b3 feat(core): support passing parent WritableStream to child workflow via start() (#2059)
* test(e2e): cover WritableStream passed as start() argument

Adds an e2e workflow + test where a parent workflow gets a WritableStream
via getWritable(), forwards it through start() to a child workflow, and
the child step writes raw bytes to it. Asserts the external reader on
the parent's stream observes the exact bytes the child wrote.

* fix(core): avoid double-framing when WritableStream is forwarded via start()

When a workflow's getWritable() handle is passed across start() to a
child workflow, the parent step's reviver wraps it in a serialize
transform that pipes into a workflow server stream. Until now,
getExternalReducers.WritableStream then installed a second serialize
transform on top of that — so every chunk the child step wrote got
devalue-framed twice but only deframed once on the reader side, and
external consumers saw the inner frame instead of the original bytes.

Fix: tag every user-visible writable that's already backed by a
workflow server stream with its (runId, name). When the external
reducer recognizes those tags during dehydration, it bridges bytes
straight from the new child-side server stream to the original server
stream instead of piping through the user's writable. That leaves the
producer-side serialize transform (installed once by the child's step
reviver) as the only framing layer in the chain.

* fix(core): forward (runId, name) when a tagged WritableStream crosses start()

Replaces the previous in-process bridge with first-class writable
forwarding at the descriptor level. When a parent workflow's
getWritable() handle is passed as an argument to a child workflow,
the dehydrated descriptor now carries the original (runId, name).
The child run's step-side reviver opens the writable against the
parent's server stream directly and resolves the parent run's
encryption key (encrypt-only) via getEncryptionKeyForRun.

This removes the architectural limitation that the bridge could
only stay alive for the duration of the parent step process — on
Vercel that capped forwarding at ~15 minutes regardless of the
child run's lifetime, dropping any writes the child made after the
parent step process exited.

importKey() now accepts a usages parameter, defaulting to
['encrypt', 'decrypt']. The cross-run forwarding path imports with
['encrypt'] only so a compromised child run cannot decrypt any
existing data on the parent's stream — only contribute new writes.

* test: rename writable-forwarded workflows and cover step-context getWritable()

Addresses PR review:

- Rename writableForwardedToChildChildWorkflow → writableForwardedChildWorkflow
  (drops the duplicated 'Child' segment).
- Split writableForwardedToChildWorkflow into two variants covered by a
  test.each: writableForwardedFromWorkflowWorkflow (workflow-context
  getWritable, the original test) and writableForwardedFromStepWorkflow
  (step-context getWritable passed directly into start() from the same
  step that called getWritable()).
- Terser changeset description.
2026-05-21 23:56:36 +00:00
Pranay Prakash 1d3959eaa8 Capture world contract failures as fatal (#2060) 2026-05-21 20:09:13 +00:00
Pranay Prakash ad71b58bba Report corrupted event logs distinctly (#2046) 2026-05-20 23:04:10 +00:00
Pranay Prakash dc0be50618 [codex] Forward port stale wait replay fix (#2038)
* Forward port stale wait replay fix

* Guard V5 replay writes against stale events

* Revert "Guard V5 replay writes against stale events"

This reverts commit 22e74d3558.

* Update wait replay comments
2026-05-20 14:41:25 -07:00
Pranay Prakash b124365e14 [codex] Guard event consumers during replay (#2030)
* Guard event consumers during replay

* Address event guard review feedback

* Update event guard test fixtures
2026-05-20 11:40:03 -07:00
Pranay Prakash 9d2a9261fd Expose conflicting run id on hook conflicts (#2012)
* Expose conflicting run id on hook conflicts

* Mark hook conflict run id as future required

* Address hook conflict docs review

* Address hook conflict review comments

* Fix hook conflict docs typecheck
2026-05-18 17:31:20 -07:00
Peter Wielander 72911f7356 [core] [nextjs] Fix world.ts being tree-shaken out of the bundle and unavailable at runtime (#1951) 2026-05-09 13:43:45 +09:00
Nathan Rajlich d0e3f2722b [swc-plugin] Capture lexical this for nested arrow step functions (#1935)
* [swc-plugin] Capture lexical `this` for nested arrow step functions

When a nested arrow `"use step"` references the enclosing function/method's
`this`, plumb that `this` through the workflow runtime so the step body
sees the correct receiver.

- Workflow mode wraps the step proxy with `.bind(this)`, so invoking the
  proxy captures the caller's `this` as `thisVal` on the queue item.
- Step mode hoists the body as a regular `function` (not an arrow) so the
  runtime's `stepFn.apply(thisVal, args)` rebinds `this` inside the
  hoisted body.

Detection only fires for arrows, since arrows inherit `this` lexically.
Nested non-arrow functions/methods/getters/setters introduce their own
`this`, so the detector stops at those boundaries.

The runtime already supported `thisVal` for instance-method steps; this
PR is purely a compiler change to feed the existing pipeline.

Caveat: capture works at runtime only when the captured value is
serializable across the workflow->step boundary (i.e. the enclosing
class implements `WORKFLOW_SERIALIZE`/`WORKFLOW_DESERIALIZE`).

Refs vercel/workflow#1865

* Address PR review: preserve step proxy metadata + tighter `this` detection

- core: Override `.bind` on step proxies so the bound function retains
  `stepId` and `__closureVarsFn`. Without this, a bound proxy that flows
  through workflow serialization (e.g. as a step argument) would be
  treated as a non-serializable plain function by `getStepFunctionReducer`.
- swc-plugin: Detector now also walks `arrow.params` so `this` references
  in default values / destructuring initializers (e.g. `(x = this.foo) =>
  ...`) trigger the `.bind(this)` path.
- swc-plugin: Class bodies inside the arrow body are now treated as
  `this`-binding boundaries — `this` inside class field initializers,
  methods, etc. is bound to the class instance, not the outer arrow. The
  detector still walks `extends` clauses and computed property keys
  because those are evaluated in the surrounding scope.
- spec.md: Sharpen the note about `this` in step bodies — it's
  syntactically allowed but only meaningful for instance-method steps and
  lexical-`this` arrow steps; other shapes compile but `this` will be
  whatever the caller of the step proxy passes.
- Add `lexical-this-detector-edge-cases` fixture covering both the
  default-param positive case and the inner-class false-positive guard.
- Strengthen the runtime test to assert `stepId` / `__closureVarsFn`
  survive `.bind(...)`.

* [swc-plugin] Fix `arguments` closure-var capture; drop dead `this`/`arguments` checks

- Add `arguments` to `is_global_identifier` so it's not captured as a
  closure variable. Previously a nested `function`-form step like

      function step() { 'use step'; return arguments[0]; }

  was hoisted with `const { arguments } = ...` (a strict-mode syntax
  error) and the body's `arguments[0]` resolved against the destructured
  binding instead of the function's intrinsic `arguments` object.
- Remove dead `ForbiddenExpression` checks for `this` and `arguments` in
  `visit_mut_this_expr` / `visit_mut_ident`. The `'use step'` /
  `'use workflow'` directives are stripped during the module-level
  traversal before children are visited, so `in_step_function` /
  `in_workflow_function` are never observed as true here in practice.
  The existing `step-with-this-arguments-super` fixture explicitly
  documents that all three identifiers are allowed in step bodies.
- Tighten the spec note about `arguments` accordingly: it works in
  `function`-form steps (reflecting positional args) but is not captured
  for arrow-form steps; use `...args` for that case.
- Add `nested-step-arguments` fixture pinning down the new behavior.
2026-05-05 19:19:42 +00:00
Pranay Prakash aee56993c7 feat: serializable AbortController/AbortSignal (#1301)
* feat: add docs and test stubs for serializable AbortController/AbortSignal

Adds documentation and test infrastructure for making AbortController and
AbortSignal serializable across workflow and step boundaries. The feature
uses a dual hook+stream backing: hooks for deterministic replay in the
workflow context, streams for real-time propagation to running steps.

Docs:
- Cancellation guide (foundations) covering AbortSignal and run cancellation
- How Cancellation Works (how-it-works) explaining hook+stream internals
- AbortSignal.timeout() error page for the workflow VM restriction
- Updated serialization docs with AbortController/AbortSignal section

Tests (all .todo stubs for TDD):
- VM behavior: AbortController API, static methods, hook integration
- Step-side: stream reader setup, abort propagation, ops queue
- Serialization round-trips: all boundaries, encryption, nested structures
- Consistency: race conditions, partial failure, eventual convergence
- E2E workflows: timeout, parallel, step-initiated, hook-triggered, replay

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: use correct frontmatter type for error page

Change type from "error" to "troubleshooting" to match the valid
frontmatter schema used by all other error pages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: address review feedback on cancellation docs

- abort() in workflow does not synchronously update signal.aborted;
  instead it queues hook resumption and the replay handles state update
- stream name and hook token are generated at serialization time (not
  deterministically in the workflow) and stored in the event log
- use throwIfAborted() instead of manual signal.aborted checks

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: document runtime change for processing abort queue items on completion

The current runtime only processes invocation queue items on suspension.
When abort() is called after the last suspension point and the workflow
completes, the queue items are dropped with a warning. Document that the
runtime needs to flush abort-related items on completion/failure too.

Add test stubs for this behavior.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: generalize queue processing on completion to all item types

Processing pending invocations queue items on workflow completion/failure
should apply to all queue item types (steps, hooks, waits, abort signals),
not just abort-related ones. Update docs and tests accordingly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: abort errors in steps are automatically wrapped in FatalError

When a step throws due to an abort (AbortError from fetch, throwIfAborted,
etc.), the error is wrapped in FatalError so the step skips retries. An
abort is intentional cancellation, not a transient failure.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: remove contrived "aborting from within a step" example

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: add meaningful step-initiated abort example (quota monitor)

Replace the contrived example with a watchdog pattern where a monitoring
step polls an external condition and aborts parallel work when triggered.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: remove unnecessary "as const" from hook cancellation example

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: implement serializable AbortController/AbortSignal

Core serialization layer:
- Add AbortController/AbortSignal to SerializableSpecial interface
- Add reducers for all 4 contexts (external, workflow, step, common)
- Add revivers for all 4 contexts with stream-backed propagation
- Add reviveAbortController helper for step/external contexts
- Guard instanceof checks for VMs without AbortController global

Workflow VM:
- New workflow/abort-controller.ts with createCreateAbortController factory
- WorkflowAbortSignal class with hook-backed state
- AbortSignal static methods (abort, any, timeout blocked)
- Hook integration via invocations queue and events consumer

Supporting changes:
- Add ABORT_STREAM_NAME, ABORT_HOOK_TOKEN symbols
- Add getAbortStreamId() for system stream namespace
- Add isSystem, abortRequested, abortReason to HookInvocationQueueItem
- Add isSystem to world Hook entity and events
- Wrap AbortError in FatalError in step handler (skip retries)
- Add AbortController/AbortSignal to Serializable type
- Add observability revivers for abort types
- Add isSystem to postgres schema and web-shared attribute panel

All 454 existing tests pass with no regressions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: wire up AbortController in workflow VM and process queue on completion

- Wire up AbortController/AbortSignal in workflow VM (workflow.ts)
- Add abort processing to suspension handler (hook resume + stream write)
- Process pending queue items on workflow completion (throw
  WorkflowSuspension instead of warning for actionable items)
- Fix instanceof guards for non-function AbortSignal in VM
- Update test to expect WorkflowSuspension for unawaited steps

All 454 existing tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: implement tests and Request.signal serialization

Tests (516 passing, 18 todo for integration tests):
- 18 VM behavior tests (abort-controller.test.ts)
- 18 step-side behavior tests (abort-controller-step.test.ts)
- 4 consistency tests + 14 integration todos (abort-consistency.test.ts)
- 14 serialization round-trip tests (serialization.test.ts)
- 7 hook integration + 4 integration todos (step.test.ts)

Request.signal serialization:
- Add signal field to SerializableSpecial Request type
- Include signal in Request reducer when present
- Pass signal through in external and step Request revivers

Fix workflow reviver for AbortController/AbortSignal:
- Use plain objects instead of prototype-based stubs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* test: implement all remaining .todo test stubs

Convert all 27 remaining .todo stubs to real implementations:
- 14 consistency tests (race conditions, partial failures, queue processing)
- 4 hook integration tests (suspension handler, hydration, eventual consistency)
- 9 e2e tests (timeout, parallel, step-abort, hook-cancel, replay, external signal)

All 558 tests pass, 0 todos remaining.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: address PR review comments + add changelog

PR review fixes:
- Move cancellation after streaming in foundations nav
- Fix AbortSignal reducer to detect WorkflowAbortSignal via symbol
- Guard AbortController reducer from matching AbortSignal objects
- Add e2e tests: throwIfAborted, reason types, uncaught fetch AbortError

Changelog:
- Add hidden changelog section (not in sidebar, accessible via URL)
- Add draft changelog entry for serializable AbortController/AbortSignal

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: show changelog in nav for preview deployments only

- Add `preview` flag to nav items in geistdocs.tsx
- Filter preview items in Navbar (server component) based on VERCEL_ENV
- Show "Preview" badge on preview nav items in DesktopMenu
- Changelog link visible in preview deployments and local dev only

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: move preview badge from home page to navbar

Move the PreviewBadge (with package tarball install modal) from the
fixed bottom-right position on the home page to the navbar, so it
appears on every page during preview deployments.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: consolidate preview tools into single Internal page

Replace separate Changelog nav item and PreviewBadge with a single
"Internal" page that only appears in preview deployments:
- Rename docs/changelog/ to docs/internal/
- Internal page includes preview package install commands and draft
  changelogs in one place
- Nav shows "Internal" with Preview badge in preview/dev only
- Remove PreviewBadge from navbar (now on the Internal page)
- Add callout that page is preview-only

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: use real deployment URLs on internal page + exclude from indexing

- Add PreviewInstall component with copy-to-clipboard buttons using
  the actual VERCEL_URL (not placeholders)
- Register PreviewInstallServer as MDX component for docs pages
- Exclude /internal/ pages from sitemap.xml, sitemap.md, and llms.mdx
- Add robots.txt Disallow for /internal/ paths

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: add missing type declarations for docs code sample typechecking

Add declare statements and @setup/@skip-typecheck annotations for
undeclared functions in code samples (stepA, stepB, fetchData,
cancellableStep, splitIntoChunks, processChunk).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: add missing type declarations for all docs code samples

Fix docs typecheck CI by adding declare statements and
@skip-typecheck annotations for all undeclared function references
across cancellation docs, error page, how-it-works page, and
internal changelog.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: only suspend on completion for abort items, not all pending items

The previous logic threw WorkflowSuspension for any pending queue item
on completion (steps, waits, hooks). This broke fire-and-forget patterns
like `void sleep('1d').then(...)` which intentionally leave a wait in
the queue without awaiting it.

Now only abort-related items (hooks with abortRequested) trigger
suspension on completion. Other pending items get the original warning
behavior — they may be intentional fire-and-forget operations.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: all pending queue items are fire-and-forget on completion

Remove special-case suspension for abort items on workflow completion.
ALL pending queue items (steps, hooks, waits, abort signals) are now
fire-and-forget when the workflow completes — they get warned about
but don't block completion. This matches the existing behavior for
fire-and-forget patterns like `void sleep('1d').then(...)`.

Abort signals propagate through the normal suspension flow during
the workflow (not at completion time).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: resolve docs typecheck errors in code samples

Move declare statements before imports to avoid TypeScript overload
signature conflicts with auto-inferred imports. Add @skip-typecheck
for conceptual snippets.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: abort() in workflow updates signal.aborted synchronously

abort() must update signal.aborted immediately so that:
1. Subsequent reads in the workflow see the correct state
2. Serialization captures aborted=true when passing signal to steps
3. Event listeners fire synchronously

The hook resumption still happens via the suspension handler for
durable event log recording. Both local state and durable state
are now updated.

Fixes e2e failures where steps received aborted=false for signals
that were aborted before being passed to the step.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: update how-it-works to reflect synchronous signal.aborted update

abort() now updates signal.aborted synchronously in the workflow.
Update lifecycle diagram and remove outdated paragraph about signal
not being updated synchronously.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: ensure abort listeners fire at deterministic point across replays

On replay, hook_received is processed during event consumer subscription
(at AbortController construction time), which is BEFORE the abort() call
in the workflow code. If listeners fired during event processing, they'd
fire at a different point than on first-run — breaking determinism.

Solution: split abort into two phases:
1. _markAbortedFromReplay(): Sets signal.aborted=true (for reads/serialization)
   but does NOT fire listeners. Called by event consumer during replay.
2. abort(): Detects the replay flag and fires listeners at the call site.
   On first-run, fires listeners immediately as before.

This ensures listeners fire at the abort() call site on BOTH first-run
and replay, maintaining consistent ordering of side effects.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* test: add replay ordering tests for interleaved hook scenarios

Add 3 tests validating that abort listeners fire at the abort() call
site on both first-run and replay, even when other hook events are
interleaved in the event log.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: signal.aborted stays false until abort() is called for deterministic replay

_markAbortedFromReplay no longer sets signal.aborted = true. Both
aborted state and listener firing are fully deferred to abort().
This prevents if-checks on signal.aborted from taking different
branches on first-run vs replay.

Add deterministic branching test (unit + e2e):
  const controller = new AbortController();
  if (controller.signal.aborted) {
    return 'was aborted';  // never taken
  } else {
    controller.abort();
    return 'just aborted';  // always taken, both runs
  }

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* test: add abort+hook ordering matrix e2e tests (4 combinations)

Test all combinations of listener registration order and event trigger
order to validate deterministic ordering across first-run and replay:

1. addEventListener first, abort() first
2. addEventListener first, resumeHook first
3. hook.then first, abort() first
4. hook.then first, resumeHook first

Each test verifies that abort-listener fires synchronously at the
abort() call site (immediately before 'after-abort' in the log),
regardless of when the hook is resumed or when listeners are registered.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: simplify abort — event consumer calls _setAborted directly

Remove the deferred _markAbortedFromReplay approach. The event consumer
now calls _setAborted directly when hook_received is processed, which
sets signal.aborted = true AND fires listeners at that point.

This is correct because:
- Cross-execution aborts (step/external): signal.aborted SHOULD be true
  on replay since the abort is a fact from a previous run. Listeners must
  fire so the workflow can react to the abort.
- Same-execution aborts: abort() fires _setAborted synchronously. On
  replay, the event consumer fires it first, and abort() is a no-op.
- The promiseQueue ensures listeners fire at the deterministic point
  matching the hook_received event's position in the event log.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* test: skip abort+hook ordering e2e tests pending full integration

The 4 ordering matrix tests require the abort controller's internal
system hook to be fully wired through the suspension handler. The hook
creation timing interacts with the user hook lookup in getHookByToken.
Skip until the full integration is complete.

All 13 other abort e2e tests pass on CI.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* handle dangling streams

* fix postgres world

* fix abort serialization bug

* refactors

* add drizzle migration file

* fix tests

* fix tests

* replace setTimeout probe and any casts with typed abort internals

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* cover post-serialization abort and nested-in-Request reader cleanup

Two leak paths the prior fix left uncovered:

- External signal aborted after serialization: verifies the listener
  attached by reduceAbortWithListener actually fires and writes the
  abort packet once the caller aborts later.
- Signal nested inside a Request: exposed a real leak. The Request
  constructor copies the signal to an internal AbortSignal, so the
  ABORT_READER_CANCEL symbol set by reviveAbortSignal never reached
  request.signal, and cancelAbortReaders' walker had no Request case
  so Object.values(request) returned []. Fixed both sides:
  - Request reviver copies abort-internal symbols via copyAbortInternals
  - Walker descends into Request.signal explicitly

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* add v4/v5 docs switcher and pre-release gating

- Mark new abort-controller/cancellation pages with preRelease: true
  (cancellation, how-it-works/cancellation, abort-signal-timeout-in-workflow,
  serializable-abort-controller). preRelease is a new optional frontmatter
  field declared in source.config.ts.
- lib/geistdocs/versions.ts: declarative version list (v4 Latest, v5 Pre-release)
  plus getVersionFromPathname and buildVersionUrl helpers used by the switcher.
- lib/geistdocs/version-source.ts: filter preRelease pages out of the v4
  sidebar tree; rewrite sidebar URLs to /v5/docs/* on v5 so links stay in
  the pre-release view.
- components/geistdocs/version-switcher.tsx: dropdown at the top of the
  sidebar, styled after the ai-sdk.dev pattern (label + subtitle).
- components/geistdocs/pre-release-banner.tsx: banner rendered above the
  docs layout on all /v5/docs/* routes, linking back to /docs/* (Latest).
- app/[lang]/v5/docs: parallel route (layout + page) that reuses the
  existing docs rendering but keeps preRelease pages visible.
- app/[lang]/docs/[[...slug]]: 404 direct access to preRelease pages on v4
  so unreleased content is never reachable without the /v5 prefix.
- next.config.ts: /v5/docs -> /v5/docs/getting-started mirror of the
  existing /docs -> /docs/getting-started redirect.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix version switcher URL when default locale is hidden

buildVersionUrl assumed segment 0 was the locale, but next.js i18n
middleware hides the default locale from the URL so usePathname()
returns '/docs/...' rather than '/en/docs/...'. The old logic treated
'docs' as the locale and produced '/docs/v5/getting-started' (404)
instead of '/v5/docs/getting-started'.

Detect the locale by checking whether segment 0 is a known structural
token ('docs' or 'v5') rather than by position, so the function works
for both '/docs/...' and '/<locale>/docs/...' inputs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* match ai-sdk pre-release banner styling

Filled sparkles glyph, blue tint on the message text, and a plain
underlined "Go to ..." link in the foreground color instead of a
bordered pill. Matches the ai-sdk.dev v7 banner reference.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* match ai-sdk switcher icons and banner link color

- Switcher: colored rounded icon tile next to each version (orange tint
  for pre-release, blue for latest), matching the ai-sdk.dev dropdown.
  Uses a workflow glyph inside a tinted ring.
- Banner link: blue text with a softer underline by default, deeper
  blue on hover. Replaces the foreground-colored link that didn't
  match ai-sdk's styling.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* use exact ai-sdk icons and darker banner link

- Switcher tile: use the T-mark SVG and the bg-orange-100/border-orange-300
  (pre-release) / bg-blue-100/border-blue-300 (latest) palette extracted
  from the ai-sdk.dev live markup, with matching dark-mode variants.
- Pre-release banner sparkle: replaced the placeholder with the exact
  three-path geist sparkle used by ai-sdk.
- Banner "Go to Latest" link: foreground color with a muted underline
  by default (same weight as ai-sdk's near-black link), underline
  intensifies on hover. The previous blue-600 was too light.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(docs): correct dark-mode colors for pre-release banner and version switcher

The geistcn design-system palette inverts brightness semantics in dark
mode (low indices = dim, high indices = bright) and remaps `blue-*` but
not `orange-*`, so the previous token choices rendered as dim gray-blue
text and a mid-bright blue icon inconsistent with the dropdown list.

- Banner: use `dark:text-blue-900` for icon + label and switch the "Go
  to" link from `text-foreground` to the same blue (with a blue
  underline) so it reads as a single colored banner.
- VersionSwitcher: move the text color onto the SVG itself so the
  `DropdownMenuItem` SVG-color override no longer hijacks the T color,
  and invert the dark blue palette (dark bg, light border, bright T) so
  the selected/trigger icon matches the list icon.
- Active-row check icon: use green instead of `fd-primary` (which
  resolves to near-white in dark mode).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix: add signal field to Request serializable type

The merge from main moved the Request type into serialization/types.ts
without carrying over the signal?: AbortSignal field, causing the
abort-related reducers/revivers in serialization.ts to fail typecheck.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* refactor: address review feedback on abort serialization

- Dedupe abort listener attach in serialization reducers via marker symbol
  (prevents N-listener leak when one controller is serialized to N steps,
  which would double-close the backing stream on abort).
- Replace token.replace('abrt_', '') string-surgery in suspension-handler
  by storing streamName directly on HookInvocationQueueItem at the point
  where it's already known (workflow/abort-controller.ts construction).
- Document the deliberate sync-vs-microtask listener divergence in the
  workflow VM (replay determinism > spec parity inside the VM).
- Add changeset noting the AbortError -> FatalError behavior change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* docs: correct cancellation docs against implementation

- Remove the contradictory paragraph claiming signal.aborted is not set
  synchronously when abort() is called in the workflow. The implementation
  sets it sync via _setAborted; replay re-applies via the events consumer.
- Reword the "Stream Succeeds, Hook Fails" recovery — there's no in-process
  retry loop on the step-side resumeHook call; convergence comes from the
  next replay re-reading the stream.
- Tighten Request.signal handling: plain non-aborted native signals are
  intentionally dropped to avoid minting stream infra for auto-generated
  Request signals; only already-aborted or workflow-tagged signals are
  forwarded.
- Replace the wrong "Pending queue items processed on completion" bullet
  with an accurate fire-and-forget note matching the warn-only behavior.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix: DOMException serialization (replace broken isNativeError guard)

DOMException is `instanceof Error` in Node but does NOT pass
`types.isNativeError()` — the existing reducer's first guard was
`isNativeError(value)`, so DOMException never matched. Devalue then
fell through to its arbitrary-POJO failure path.

This surfaced as a real bug for AbortController/AbortSignal: when
abort() is called with no argument, native AbortController synthesizes
a default DOMException as signal.reason. Returning that signal's reason
from a step (e.g. `{aborted, reason: signal.reason}`) crashed step
return-value serialization.

Replace the guard with a constructor-name check (cross-VM safe; same
pattern used elsewhere for matching Error subclasses across realms).

Also fixes 7 pre-existing DOMException tests in serialization.test.ts
that were previously failing on main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix: drain pending queue items on workflow completion

End-of-run now goes through the same suspension handler that processes a
real suspension. Previously, items left in the invocations queue when the
workflow function returned (or threw) were dropped with an "uncommitted
operation" warning — `controller.abort()` called as the last statement of
a workflow never actually propagated.

Concretely fixes:
- Abort hooks now write hook_received + stream packet so in-flight steps
  on other compute instances see signal.aborted=true and bail out.
- Unawaited hooks are created (so external callers can resume them).
- Unawaited steps and sleeps are queued (will execute / fire later).

Strengthens abortTimeoutWorkflow's test to inspect the event log for the
hook_received event — the original assertion only verified the workflow
VM's local signal.aborted, which was set synchronously by the abort()
call regardless of whether propagation actually happened. The strengthened
test fails on main and passes after this commit.

Drops the warnPendingQueueItems warning entirely. Drain failures are
swallowed so the workflow's own outcome (return value or thrown error)
remains the source of truth for the run's terminal state.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: cover the deserialized AbortSignal listener path with an in-flight fetch

The existing abort tests exercised either the polled `signal.aborted` read
path (longStep busy-wait) or the already-aborted-before-fetch path. Nothing
exercised the live listener path: signal starts non-aborted, step kicks off
a fetch against a slow endpoint, abort fires while fetch is awaiting the
response, and fetch's internal `signal.addEventListener('abort', …)` listener
cancels the in-flight HTTP request.

The pre-existing `fetchWithSignal` helper step was orphaned — defined but
not referenced by any workflow. Wires it into a new `abortFetchInFlightWorkflow`
that races a 30s fetch against a 2s sleep, aborts when the sleep wins, and
returns the step's catch-path result. The test asserts both `winner=timeout`
and `fetchResult.aborted=true`, which together prove fetch saw the cancellation
mid-flight (the natural-completion path would set ok=true,aborted=false).

Adds a local /api/delay endpoint to the nextjs-turbopack workbench so the test
doesn't depend on an external service. Honors the request's own AbortSignal
so cancelled connections close immediately.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: extend abortFromStepWorkflow to verify in-flight sibling cancellation

The original test only asserted that the workflow VM's signal saw aborted=true
after a step called controller.abort(). It didn't actually verify that another
in-flight step received the cancellation through the backing stream — those
two paths are different (workflow VM signal updates via the hook event;
sibling-step propagation runs through the live stream packet).

Restructure the workflow to run longStep (a 30s polling loop on signal.aborted)
in parallel with abortFromStep (now sleeps 1s, then aborts). The new assertion
expects longStep.result === 'aborted' — proving it exited via the abort branch
within ~1.5s, NOT ran to its 30s natural completion. Returning 'completed'
would mean realtime cross-step cancellation is broken.

abortFromStep gained an optional delayMs parameter so it can be sequenced
against a sibling without an out-of-band sleep.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix: dehydrate abort stream packets via the same machinery as hook events

The abort stream packet was being encoded with bare `JSON.stringify({reason})`
on the writer and decoded with `JSON.parse(text).reason` on the reader. That
codec drops `undefined` (so a reason-less abort wrote literally `{}` and the
observability UI showed an empty stream), and doesn't handle DOMException or
any other type the rest of the codebase serializes via devalue+reducers.

Switch all three sites — suspension-handler workflow-side write, patched
abort step-side write, and `setupAbortStreamReader` — to use
`dehydrateStepArguments`/`hydrateStepArguments`. Now the `reason` round-trips
with full type fidelity (DOMException, custom errors, encrypted payloads),
matching what the hook event payload already does. The suspension handler
literally reuses the same dehydrated bytes for the event and the stream so
they're guaranteed identical.

Encryption key threading:
- Suspension handler: `encryptionKey` was already in scope.
- Patched abort: read from `contextStorage.getStore()?.encryptionKey` (set
  by the step handler before invoking the deserialize chain).
- Reader (`setupAbortStreamReader`): read from `contextStorage.getStore()?.encryptionKey`
  for the same reason; falls back to `undefined` when called outside step
  context (the hydrate path is key-tolerant).

On-disk verification:
- Before: chunk for `controller.abort()` (no reason) was `00 7b 7d` — 3 bytes,
  the literal JSON `{}`, no reason carried at all.
- After: chunk is `00 64 65 76 6c [{"aborted":1,"reason":2},true,"test"]` —
  43 bytes, devalue-flat-encoded with the reason intact.

Updated the existing stream-reader unit test to encode its mock payload
through the same dehydrate path so the reader can decode it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: cover addEventListener, mid-flight throwIfAborted, and step-initiated determinism

The polled-`signal.aborted` path was the only abort consumption pattern
exercised end-to-end. Three new e2e tests fill the gaps:

- **abortListenerWorkflow** — `signal.addEventListener('abort', cb)` firing
  on the deserialized step-side signal. Distinct from abortFetchInFlightWorkflow
  which only proves it indirectly through fetch's internal listener; this one
  verifies user-attached listeners directly. Step resolves with via:'listener'
  if propagation worked, via:'timeout' on a 30s safety timeout if it didn't.

- **abortThrowIfAbortedMidFlightWorkflow** — throwIfAborted() in a polling
  loop, not just at step entry. The existing abortThrowIfAbortedWorkflow
  only covers the synchronous-throw case on a pre-aborted signal. This one
  starts the signal non-aborted, polls throwIfAborted every 500ms, and aborts
  from a sibling step after 1s. Verifies the DOMException propagates as
  FatalError (no retries) when fired mid-flight.

- **abortDeterministicBranchFromStepWorkflow** — counterpart to
  abortDeterministicBranchWorkflow, but with the abort source being a step
  (via the patched abort() path / hook event) instead of the workflow body.
  Both branch-reads MUST take the same path on every replay. Uncovered a
  real semantic: signal.aborted reflects step-initiated aborts only after
  the next promise-queue checkpoint (sleep, step await, etc.) since
  _setAborted is chained on promiseQueue. The test inserts the required
  sleep('1s') checkpoint and asserts both pre and post values.

Helper steps factored: stepWaitingOnAbortListener and stepPollingThrowIfAborted.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: drop signal.aborted shortcut in stepWaitingOnAbortListener

The shortcut would have masked a regression in the addEventListener-on-an-
already-aborted-signal contract. Per the AbortSignal spec, calling
addEventListener('abort', cb) on an aborted signal fires the callback (on a
microtask), so user code that subscribes via the listener path alone — the
common pattern — depends on it. Test the contract directly: rely solely on
the listener resolving the promise. If addEventListener-on-aborted ever
silently breaks, this test now reports via:'timeout' instead of paving over
it with a fast-path that reads signal.aborted directly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix: add DOMException reviver to observabilityRevivers so the o11y UI hydrates abort reasons

The observability UI (and CLI) hydrates step IO via `observabilityRevivers`,
which had no `DOMException` entry. When a step returned a value containing
a DOMException (typically `{aborted, reason: <DOMException>}` — synthesized
by native AbortController when abort() is called with no reason), devalue's
`parse` would throw on the `["DOMException", ...]` tag, `hydrateStepIO`'s
try/catch would swallow it, and the raw devalue-flat string survived to
the UI. The user-visible result was step Output showing literal text like:

  devl[{"aborted":1,"reason":2},true,["DOMException",3]...]

instead of a JSON viewer with a proper DOMException card.

Add the reviver. Reconstruct as a real DOMException when the global is
available (modern browsers + Node 18+, where the o11y consumers run),
falling back to a name-tagged Error otherwise. Preserves message/name/
stack/cause for display.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: cover the external-signal-aborted-in-flight propagation path

The existing abortExternalSignalWorkflow only validates a static read of
an already-aborted signal — it tells us nothing about whether an abort
that fires AFTER serialization actually propagates from the caller process,
through the listener attached at workflow-start, into the backing stream,
and out into the deserialized signals on the in-flight step compute.

Add abortExternalSignalInFlightWorkflow that takes a non-aborted signal
and runs two parallel consumption patterns against it: longStep (polling
signal.aborted) and stepWaitingOnAbortListener (addEventListener path).

The test creates a fresh AbortController, calls start() with its non-aborted
signal, and aborts the source controller 1.5s later via setTimeout — well
after both steps are mid-flight on their compute instances.

Both consumers must see the cancellation:
- pollResult === 'aborted' (NOT 'completed' — that would mean longStep ran
  the full 30s without ever seeing signal.aborted=true)
- listenerResult.via === 'listener' (NOT 'timeout' — that would mean the
  addEventListener callback never fired)

This exercises the longest end-to-end abort path in the codebase:
  caller-process AbortController → serialization-time listener →
  backing stream → step compute → deserialized signal →
  (poll OR addEventListener)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(test): use httpbin.org/delay for abortFetchInFlightWorkflow

The previous setup added a /api/delay route to workbench/nextjs-turbopack
to give the test a slow endpoint to fetch against. That made the workflow
fail in CI on every other workbench (nextjs-webpack, astro, sveltekit, …)
since the route only existed on one of them — fetch returned 404 and the
test failed within 1s instead of taking the expected ~3s.

Switch to httpbin.org/delay/30, the same external-service pattern used by
other e2e workflows in this file (jsonplaceholder, example.com). Removes
the per-workbench dependency. Drops the now-unused deploymentUrl argument
from the workflow signature and test call site.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* docs: fix serialization page — drop duplicate header, move AbortController section

Two issues on the serialization foundations page:

1. `## Pass-by-Value Semantics` appeared twice. The second occurrence had no
   body, which rendered as an orphaned heading just above the AbortController
   section in the docs preview.

2. `## AbortController & AbortSignal` was at the bottom of the page, after
   `## Custom Class Serialization`. It belongs above the custom-class section
   so the standard serializable types are grouped together before the
   advanced topic.

Removes the empty duplicate; relocates the AbortController section to sit
between Request & Response and Custom Class Serialization. No content
changes inside the section.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* docs: note that run.cancel() is the same as the observability Cancel button

The Run Cancellation section showed the programmatic path but didn't tie
it back to the UI. Add a callout: calling run.cancel() is the same action
as clicking the Cancel button on a run in the observability UI — both
produce identical run_cancelled events.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: cover AbortSignal.any in both workflow VM and step contexts

Two distinct paths: the workflow VM ships its own AbortSignal.any impl in
workflow/abort-controller.ts (composes WorkflowAbortSignals via listeners,
no stream/hook backing on the composite), while steps use the native
Node implementation over deserialized signals. Neither was tested.

abortAnyInWorkflowWorkflow exercises the VM impl directly: creates two
controllers, composes their signals via AbortSignal.any, aborts one, and
asserts the composite reflects the abort synchronously without any stream
round-trip. Also asserts the other source signal is unaffected so a
mass-abort regression would surface here.

abortAnyInStepWorkflow exercises the longest end-to-end path that uses
AbortSignal.any: source controller is aborted by a sibling step, abort
flows through the workflow's VM, then the backing stream, into the step's
deserialized signal, into the AbortSignal.any composite, into the user's
listener. Returning via:'timeout' instead of via:'listener' would mean a
break anywhere on that chain.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Update .changeset/fix-dom-exception-serialization.md

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>

* Update .changeset/serializable-abort-controller.md

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>

* Update .changeset/drain-pending-queue-on-completion.md

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>

* docs(errors): match slug-as-title convention + simplify the timeout example

Two toolbar-comment fixes on the abort-signal-timeout-in-workflow error
page:

1. The page title was Title Case ("AbortSignal.timeout() in Workflow")
   while every other page in docs/content/docs/errors/ uses the kebab-case
   slug as the title (e.g. timeout-in-workflow, fetch-in-workflow,
   workflow-not-registered). Match the convention.

2. The recommended replacement for AbortSignal.timeout() was a
   Promise.race that wrapped the abort + null sentinel + custom Error
   throw. Boil it down to the much simpler:

       const controller = new AbortController();
       void sleep("10s").then(() => controller.abort());
       return await fetchData(controller.signal);

   If fetchData finishes within 10s you get the response; if not, the
   timer fires controller.abort(), fetch rejects with AbortError, and
   the step's failure propagates to the workflow as a FatalError (no
   retries). Same observable behavior, no Promise.race scaffolding.

Adds abortVoidSleepTimeoutWorkflow + matching e2e test that exercises
this exact pattern end-to-end so the doc example is verified runnable
(not just pseudocode). Asserts the fetch is cancelled mid-flight by
the timer, returning aborted=true,ok=false from the step.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Karthik Kalyanaraman <karthik.kalyanaraman@vercel.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Peter Wielander <mittgfu@gmail.com>
2026-05-05 19:42:15 +09:00
Peter Wielander 3535caf449 [core] Skip inline step execution when suspension also has a wait (#1924) 2026-05-05 09:49:35 +09:00
Nathan Rajlich 5f22832675 Serialize run_failed/step_failed errors through serialization pipeline (#1851)
* Serialize run_failed/step_failed errors through serialization pipeline

Switch run_failed, step_failed, and step_retrying events to persist
the full thrown value via the workflow serialization pipeline (as
SerializedData / Uint8Array) instead of a lossy { message, stack, code }
StructuredError shape. Consumers hydrate via hydrateRunError /
hydrateStepError to reconstruct the original thrown value, preserving
Error subclass identity, cause chains, and custom properties.

- WorkflowRun.error and Step.error are now SerializedData
- WorkflowRun gains a top-level errorCode plaintext field
- WorkflowRunFailedError.cause is now the hydrated thrown value
- Adds world-postgres migration 0010_add_error_code.sql
- Legacy pre-pipeline errorJson records surface as undefined on read

* Update Next.js workbenches for new WorkflowRunFailedError.cause type

cause is now `unknown` (the hydrated thrown value) rather than
`Error & { code }`. Defensively extract Error-shaped fields when the
hydrated value is an Error, otherwise round-trip the raw value, and
expose the new `errorCode` classification field.

* Update docs for WorkflowRunFailedError.cause: unknown

The hydrated `cause` is now `unknown` (the original thrown value
through the serialization pipeline) and the error classification has
moved to the top-level `errorCode` property. Update the two affected
docs pages and the `TSDoc` interface to reflect the new shape, and
narrow `cause` with `instanceof Error` before accessing fields.

* Expand test coverage for the run/step error serialization pipeline

Unit tests:
- 19 new dehydrate/hydrate{Step,Run}Error round-trip tests covering
  FatalError, plain Error, built-in Error subclasses, non-Error thrown
  values (string, plain object), cause chains, encryption round-trip,
  the binary format prefix contract, and the unserializable / unknown-
  format error paths.
- 5 new tests for Run.returnValue when the run is failed: hydrated
  FatalError + cause as cause, plain Error preservation, non-Error
  thrown values surfaced verbatim, cross-class cause chains, and the
  hydration-failure fallback that still surfaces errorCode.

E2E tests (new, in 99_e2e.ts + e2e.test.ts):
- Step throw → workflow catch round-trips a FatalError with a TypeError
  cause chain, asserting class identity, fatal marker, and cause name +
  message all survive the step_failed event pipeline.
- Workflow throw → run_failed reaches  status with the new
  top-level errorCode metadata exposed (cause-shape coverage lives at
  the unit level, since the SWC plugin's class registration is not
  invoked in the plain-Node e2e runner).
- Workflow throw of a non-Error value round-trips that value verbatim
  as WorkflowRunFailedError.cause.

Adjustments to existing assertions:
- error.cause is now ; tests narrow with
  and use the new top-level  field instead of .
- step.error / run.error from CLI --withData are now hydrated payloads:
  unregistered class instances surface as Instance refs whose
  carries the original message + stack.

Observability hydration:
- hydrateStepIO / hydrateWorkflowIO in serialization-format.ts now
  hydrate the  field via hydrateData, so the CLI and web UI
  continue to surface readable run/step error messages and stacks.

* Tighten error serialization changeset description

* Trim error serialization changeset to a single sentence

* Resolve FatalError/RetryableError revivers via cross-realm registry

When a workflow runs in a Node `vm` context, its bundled
`@workflow/errors` is a different module instance than the host's
import (separate prototype chains, separate class identity). Calling
`new FatalError(...)` from the host-side reviver produces a
host-realm instance that fails `err instanceof FatalError` checks
in the workflow code — even when the serialized payload was correctly
tagged via the dedicated `FatalError` reducer.

Surfaced by the local-prod e2e "step throw round-trips FatalError"
test on Next.js Turbopack: each route gets its own bundled chunk, so
the flow handler's `@workflow/errors` and the workflow VM bundle's
`@workflow/errors` are two distinct copies of the same module.

Fix:

- Each bundled copy of `@workflow/errors` self-registers its
  `FatalError` and `RetryableError` classes on `globalThis` via
  `Symbol.for("@workflow/errors//FatalError")` /
  `Symbol.for("@workflow/errors//RetryableError")`. First load wins
  per realm; the descriptor is non-writable / non-configurable to make
  accidental clobbering loud.

- The revivers in `@workflow/core`'s common reducers module read the
  consumer's `globalThis` (passed in as `global`) to pick up the
  realm-local class, falling back to the host-imported class when no
  registration is present (e.g. in the CLI / test runner).

* Use `types.isNativeError` to remap workflow stacks across VM realms

The runtime's run-failure path computes a source-map-remapped stack
and then assigns it back onto the thrown value via `if (err
instanceof Error) err.stack = errorStack`. Workflows run inside a
Node `vm` context, so a workflow-thrown error is an instance of the
VM realm's `Error` — `instanceof` against the host realm's
`Error` returns `false`, the assignment is skipped, and the
serialized `run_failed` event carries the un-remapped (bundled-line-
number) stack instead of the source-mapped one.

Switch the gate to `types.isNativeError`, which uses V8's internal
type tag and works across realms — same approach already in place
for the serialization reducers.

Caught by the local-prod e2e "nested function calls preserve message
and stack trace" and "cross-file imports preserve message and stack
trace" tests, which assert that the persisted run-error stack
contains `99_e2e.ts` / `helpers.ts`.

* Sync CLI revivers with core + add toJSON shim for Error subclasses

Two issues with the CLI's hand-rolled reviver list:

1. It hadn't been updated for the new first-class Error subclass
   reducers (`TypeError`, `RangeError`, `FatalError`, `RetryableError`,
   etc.). devalue throws "Unknown type X" when it encounters a
   reduced value with no matching reviver, and `hydrateResourceIO`
   swallows that error and surfaces the raw `Uint8Array` payload —
   so `step.error` / `run.error` showed up as raw byte dumps in
   `workflow inspect` output.

2. Even with all the right revivers, `Error.prototype`'s `message`
   / `stack` / `cause` are non-enumerable, so `JSON.stringify`
   (used by `workflow inspect --json`) drops them — leaving the
   subclass-specific enumerable fields (e.g. `FatalError.fatal`)
   visible but the actual error data missing.

Fix:

- Build the CLI reviver set on top of `getCommonRevivers()` from
  `@workflow/core` so the CLI stays in sync with the runtime's
  reducer set automatically. New core reducers/revivers will Just
  Work without any CLI-side change.

- Wrap each Error reviver from the common set with a thin shim that
  attaches a non-enumerable `toJSON` method to the produced
  `Error` instance. `JSON.stringify` calls `toJSON` and gets a
  full object (`name` + `message` + `stack` + `cause` + any
  enumerable subclass fields like `fatal` / `retryAfter` /
  `errors`); `util.inspect` ignores `toJSON` and renders the
  canonical `Error: msg\\n at ...` format. Best of both worlds for
  CLI output without compromising the runtime hydration path.

Caught by the local-prod e2e "basic step error preserves" and
"cross-file step error preserves" tests, which read
`failedStep.error.message` / `.stack` from the CLI's JSON output.

* Clarify parseErrorJson JSDoc to match its always-null return

The previous JSDoc described preserving legacy values "for best-effort
hydration" which contradicted the implementation, where legacy errors
are intentionally surfaced as absent (the pre-pipeline shapes can't be
hydrated by the new error revivers). Rewrite the comment so the contract
matches behavior. Also rename the now-unused parameter to `_errorJson`
to reflect that the function ignores it.

Caught by a code review on #1851.

* Refine error-handler ergonomics on the step / run hot paths

Three review-driven adjustments that all touch the queue handlers and
their interaction with the error serialization pipeline:

1. Memoize the per-run encryption key fetch. The step handler used to
   eagerly fetch + import the key at the top of every step delivery so
   the value would be in scope for every potential dehydrateStepError
   path. That pessimized step-started early-return cases (the fetch
   happens unconditionally even when the step never reaches user code)
   and required duplicating the same boilerplate at four call sites in
   runtime.ts. Introduce `memoizeEncryptionKey(world, run)` in
   runtime/helpers.ts that returns a lazy, single-fetch accessor;
   step-handler / runtime call sites use `await getEncryptionKey()`
   instead. The first caller pays the fetch cost, subsequent callers
   await the cached promise, and steps that fail before any
   encryption-aware work happens skip the fetch entirely.

2. Preserve the prior attempt's serialized error as the cause on the
   defensive max-retries-exceeded `step_failed` re-invocation guard.
   The existing comment explicitly opted out of cause attachment, but
   the symmetric post-failure path below already does this and the
   reviewer is right that consumers shouldn't have to walk the
   step_retrying event history to recover the underlying error. Best-
   effort: if hydration of the prior `step.error` throws, fall back
   to a FatalError without cause rather than letting the event write
   itself fail.

3. Document the intentional `unflatten` throw in
   `hydrateStepError` / `hydrateRunError` for non-Uint8Array input.
   SDK version is pinned per workflow run via skew protection so the
   non-binary branch is dead in production; if a misshapen value
   reaches it, surfacing the throw via the surrounding o11y try/catch
   is more debuggable than masking it. Add a comment so future
   reviewers don't reach for a defensive fallback.

A standalone `falls back to plaintext` suggestion on the run_failed
key fetch was rejected: when encryption is configured we should fail
loudly rather than silently emit plaintext error data. The queue's
redelivery semantics will retry the key fetch; persistent KMS outages
get logged with the existing "persistent error preventing the run from
being terminated" message rather than a security regression.

* Hydrate `event.eventData.error` in event listings

`hydrateEventData` enumerated the per-event fields that need
hydration (`result`, `input`, `output`, `metadata`, `payload`)
but omitted the new `error` field on `step_failed`,
`step_retrying`, and `run_failed` events. Without this branch,
o11y tools that list events (e.g. `workflow inspect events`) surface
the raw `Uint8Array` payload instead of a hydrated
`{ name, message, stack, … }` object even though the entity-level
`Run.error` / `Step.error` paths already hydrate.

Mirrors the existing per-field branches; the `try/catch` leaves the
field un-hydrated on parse failure rather than failing the whole
event view. Adds a unit test.

* Use `.is()` static checks in `classifyRunError` for cross-realm safety

Workflows execute inside a separate `vm` realm: the
`WorkflowRuntimeError` class bundled into the workflow code and the
host-imported one are distinct constructors, so an
`err instanceof WorkflowRuntimeError` check on a VM-thrown error
returns `false` and we'd misclassify genuine runtime errors (corrupted
event log, missing timestamps, workflow/step not registered) as user
errors.

Switch to each subclass's `.is()` static (a name-based duck check that
works across realms). Since `WorkflowRuntimeError.is` only matches its
own concrete name, enumerate every concrete subclass we want to
recognize (`StepNotRegisteredError`, `WorkflowNotRegisteredError`)
in a `RUNTIME_ERROR_CHECKS` table; keep that table in sync with the
class hierarchy in `@workflow/errors`.

Existing `classify-error.test.ts` already covers `WorkflowRuntimeError`
and `WorkflowNotRegisteredError` cases — both still pass.

* Add e2e coverage for step throws of non-Error values

We had `errorWorkflowThrowNonErrorValue` (workflow body throws a plain
object — round-trips verbatim as `WorkflowRunFailedError.cause`) but
no symmetric coverage for the step-throw side. Step-throw goes through
a different code path: non-Error values aren't recognized as
`FatalError` (no `name === 'FatalError'`) nor `RetryableError`,
so they take the transient retry path. After max retries the runtime
wraps the original thrown value as `cause` on a fresh `FatalError`
which the workflow's catch block then sees.

Add a workflow that throws a recognizable plain object from a step
with `maxRetries = 0` (so we exhaust on first attempt and avoid a
long test wait) and a workflow that asserts the wrapped FatalError
shape: `isFatal`, `instanceof FatalError`, message includes the
original object's serialized form, `cause` is the original non-Error
object verbatim with structure preserved.

Documents the current retry-then-wrap behavior so any future change
to "non-Error throws skip retries" semantics has to update the test.

* Note legacy postgres error-data loss in the run/step error changeset

Pre-upgrade failed runs that wrote into world-postgres's deprecated
`error` text column can't be hydrated through the new pipeline (the
shape is incompatible with the new revivers). The new runtime
intentionally surfaces them as `error: undefined` on read; the
original payload is still readable directly from the `errorJson`
column for manual inspection. Add a one-sentence note to the
changeset's migration text so consumers upgrading don't get blindsided
by suddenly-empty error fields on historical runs.
2026-05-04 15:18:46 -07:00
Peter Wielander 8ea1532e48 [core] Combine flow+step bundle and process steps eagerly (#1338) 2026-05-04 09:53:02 +00:00
Pranay Prakash 1203dae70c Friendlier workflow errors (consolidated) (#1849)
* Introduce structured context-violation errors + Ansi renderer

Phase 1: Add Ansi rendering helpers (frame, hint, note, help, code, inline)
to @workflow/errors, and a chalk mock for readable snapshot tests.

Phase 2: Add four context-violation error classes to @workflow/core
(NotInWorkflowContextError, NotInStepContextError,
NotInWorkflowOrStepContextError, UnavailableInWorkflowContextError)
and apply them to all twelve user-facing throw sites so errors now
include docs links and a structured "what/why/fix" frame.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Address review: tighten changeset, implement ansifyName, harden Ansi

- Tighten phase 1 changeset to a single sentence (per pranaygp review) and switch to double-quoted frontmatter (per Copilot + repo convention).
- Implement `ansifyName` to actually apply dim styling to workflow/ / step/ prefixes; add an `Ansi.dim` helper to `@workflow/errors` so callers don't need to import chalk directly.
- Remove the `void getWorkflowMetadata;` workaround in context-errors.ts by dropping the unused value import (we only needed the type and symbol).
- Render the plain-Error throw in `workflow/get-workflow-metadata.ts` with `Ansi.frame` + docs link so the VM path matches the structured-class styling from the sibling step path (still uses a plain Error to avoid the module-init cycle).
- Guard `buildUnderline` against zero-length markers so a stray empty token can't produce a negative `String.repeat` count.

* Structured runtime logger metadata + fold in replay-timeout logging

Adds a `.child()` and `.forRun(runId, workflowName)` child-logger API to
the structured logger so runtime/step code doesn't have to repeat
`workflowRunId`/`workflowName`/`stepId` on every call. Normalizes error
metadata to structured `errorName` / `errorMessage` / `errorStack` fields
instead of ad-hoc `error: err.message` strings, and adds comments to
silent catches that swallow expected idempotency conflicts.

Also folds in the pending changes from #1812 so that PR can be closed:

- Standardize the console prefix to `[workflow-sdk]`.
- Split the replay-timeout log into a warn-while-retrying vs.
  error-when-giving-up, and surface the underlying error when we can't
  mark a timed-out run as failed.
- Include the error stack in the "Fatal runtime error during workflow
  setup" log and in the top-level user-code workflow error log so the
  stack surfaces in flattened log drains.
- Drop the `[Workflows] "<runId>" - ` prefix from
  `buildWorkflowSuspensionMessage` — the structured logger now attaches
  run context.

Supersedes #1812.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Use double-quoted changeset frontmatter per repo convention

* Add SerializationError + apply to user-facing serialization sites

Phase 4 of friendlier errors: introduce a `SerializationError` class with
an optional `hint` and a docs link (workflow-sdk.dev/err/serialization-failed),
and adopt it at every user-facing serialization boundary in @workflow/core:

- Locked ReadableStream at a workflow boundary
- Unregistered class / missing `classId` / missing `WORKFLOW_DESERIALIZE`
- Attempting to return step functions to clients or call workflow functions
  directly
- Webhook `respondWith()` called outside a step
- `dehydrate*` / `getSerializeStream` failures (workflow args/return, step
  args/return, stream chunks)

Internal invariants (format prefix length checks, unknown format bytes,
missing `STREAM_NAME_SYMBOL`, encryption key/size guards, etc.) now throw
`WorkflowRuntimeError` instead of plain `Error` so the classifier and logger
treat them consistently.

`formatSerializationError` now returns `{ message, hint }` so the hint
fragment can be rendered with the standard SerializationError framing
instead of being baked into the message string.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Use double-quoted changeset frontmatter per repo convention

* Presentation-only user vs SDK error attribution

Add describeError() that derives attribution and class-aware hints from
existing error classes + RUN_ERROR_CODES — no event data changes. Wire into
step failures, max-delivery exhaustion, run failures, and fatal setup errors
so terminal logs include errorAttribution and a hint for known error types.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Address review: describeError accepts precomputed errorCode + instanceof

- `describeError(err, errorCode?)` now accepts an optional precomputed
  `RunErrorCode`. `classifyRunError(err)` only narrows to USER_ERROR /
  RUNTIME_ERROR, so the REPLAY_TIMEOUT and MAX_DELIVERIES_EXCEEDED branches
  were previously unreachable from the step / run failure log sites.
  Callers that know the failure category (runtime.ts for replay timeout and
  max-deliveries exhaustion) now pass the code in.
- Context-violation checks use `instanceof` against the actual classes from
  context-errors.ts instead of a name-string set. Type-safe + survives
  class renames.
- Wire the new hints through to the REPLAY_TIMEOUT and MAX_DELIVERIES_EXCEEDED
  log sites so those branches actually render a hint now.
- 3 new tests cover the reachable code paths + precomputed-code override.
- Changeset frontmatter switched to double quotes per repo convention.

* Cosmetic consistency pass on remaining bare throws

Internal invariants now use WorkflowRuntimeError so describeError attributes
them to the SDK: missing startedAt, VM generateKey, closure-vars outside
step context, ENOTSUP. defineHook().resume() formats schema validation
failures as a readable list instead of a JSON blob.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Use double-quoted changeset frontmatter per repo convention

* Data-driven describeRunError + expose via @workflow/core/describe-error

Observability renderers read persisted run_failed / step_failed event data,
not live Error instances. describeRunError takes { errorCode, errorName }
and returns the same { attribution, hint } shape as describeError, so the
CLI and web UI can derive user-vs-SDK framing from the event log directly.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Friendlier build-time errors: WorkflowBuildError class + applications

Add `WorkflowBuildError` class in `@workflow/errors` with optional `hint`
for an actionable next step, and apply it in `@workflow/builders` at
user-facing sites: failed esbuild phases, unresolved built-in steps, and
empty esbuild output now throw `WorkflowBuildError` with a hint pointing
at the likely fix. Runtime invariants remain plain `Error`.

* Polish friendlier-errors rendering: drop functionName leak, simplify docs link, redirect stack

- Drop the readonly `functionName` param-property on context-error classes so
  util.inspect no longer prints a trailing `{ functionName: 'foo()' }` block.
- Replace the `DocLink` ("label: https://…") shape with a plain `DocsUrl`
  template-literal type. Error output now renders a single clean line:
  `docs: https://…` (new `Ansi.docs` helper) instead of the noisier
  "note: Read more about foo(): https://…".
- Add throw helpers (`throwNotInWorkflowContext`, etc.) that call
  `Error.captureStackTrace(err, stackStartFn)` on V8 engines so the top frame
  of the thrown error points at the user's call site instead of at the gate
  function inside the framework. Callers pass themselves as the boundary.
- Refactor `defineHook()` (both root and `/workflow`) to use named function
  closures rather than `this.create`/`this.resume`, since the stack redirect
  relies on a stable function identity that survives destructuring.
- Update context-errors.test.ts to snapshot the new `docs:` framing and to
  add a regression test asserting the top stack frame is the user call site.

* Consolidate friendlier-errors stack: fix ANSI leak + non-retry semantics

Addresses PR review feedback across the 8-phase friendlier-errors stack and
fixes issues surfaced by manual testing (createHook() inside a step):

- ANSI no longer leaks into .message / .stack. Context-violation errors
  now store plain text on .message and render the colored framed form
  lazily via [util.inspect.custom] / toString(). Structured logs, log
  drains, CBOR-serialized events, and JSON payloads no longer contain
  raw \x1B[...m bytes.

- Context violations are now fatal. ContextViolationError sets
  fatal = true; FatalError.is(err) recognizes any error with a
  fatal: true own property. Calling createHook() from a step no longer
  burns three retry attempts on a guaranteed-to-fail context violation.

- Ansi helpers moved to @workflow/errors/ansi subpath so imports from
  @workflow/errors no longer pull chalk into consumers that only want
  error classes (addresses reviewer VaguelySerious).

- Shared redirectStackToCaller helper in packages/core/src/capture-stack.ts,
  used by both context-errors.ts and workflow/get-workflow-metadata.ts
  (addresses Copilot review on #1849).

- Structured framed content: ContextViolationError now takes a structured
  FramedContent (title segments + detail branches) and renders plain/pretty
  from the same source of truth.

Tightens the eight existing phase changesets to 1-2 sentences each and adds
four new scoped changesets (errors-ansi-subpath, context-errors-plain-message,
context-errors-fatal, capture-stack-shared) for the followup fixes, so the
final changelog history stays readable.

* test: update step-handler mocks for scoped forRun() logger

The runtime logger now uses .forRun(runId, name, {stepId, stepName})
to attach scope context, so 409-handling log calls no longer repeat
{workflowRunId, stepId} in every metadata bag — those live on the
scoped logger instance. Update the mock to return itself from forRun()
and tighten assertions to check both the log args (errorName/errorMessage)
and the forRun() scope.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Mark SerializationError fatal + route dehydration through step-failure path

SerializationError now carries readonly fatal = true. Step-return
dehydration is wrapped inside the user-code try/catch so that the
resulting error flows through userCodeFailed → step_failed →
FatalError.is() short-circuit instead of bubbling up as HTTP 500 and
triggering a queue retry loop. Retrying a step that returned a non-POJO
is guaranteed to fail the same way, so this saves ~20s and 3 near-
identical error blocks per serialization failure.

* Add logging snapshot tests + manual-test artifacts

Snapshot tests lock in the exact shape of:
- describeError() payloads (attribution, errorCode, hint) for every
  classification — plain Error, SerializationError, context-violation,
  WorkflowRuntimeError, REPLAY_TIMEOUT, MAX_DELIVERIES_EXCEEDED.
- The scoped-logger call signature for the two canonical runtime
  failure paths (fatal-bubble and hit-max-retries), so refactors of
  forRun() / child() metadata merging can't silently change what users
  see in their log drains.

SerializationError now also has a direct test for readonly fatal=true
+ FatalError.is() recognition.

pr-artifacts/ contains real log-output snapshots from running the
nextjs-turbopack workbench against five error scenarios. These are
reference material for reviewers and are flagged to be removed before
merge.

* Readable step-fatal logs: inline stack + friendly step/workflow names

The step-level fatal-error log used to embed the full stack trace inside
an `errorStack` string field in the metadata object, so util.inspect
rendered it as a quote-escaped, line-continuation blob when the log
hit the terminal — unreadable in practice. Move framing + stack into
the log *message* (matching the workflow-level log in runtime.ts) and
keep the metadata object compact with only the indexable structured
fields (`errorAttribution`, `errorName`, `errorMessage`, `hint`,
IDs). Log drains still get the same keys; humans now see a readable
stack trace.

Also introduce `formatStepName` / `formatWorkflowName` in
`@workflow/utils` that render machine names
(`step//./workflows/1_simple//add`) as `add (./workflows/1_simple)` in
log framings, using the existing `parseStepName` / `parseWorkflowName`
parsers. Applied to step-fatal, hit-max-retries, exceeded-max-retries,
and workflow-threw log sites.

Artifacts in pr-artifacts/ updated to show the new output shape, and
renamed .log → .md since they're Markdown and IDE previews are nicer
that way.

* Opinionated pretty formatter for runtime structured-log metadata

Replace util.inspect's default object dump (which quote-escapes
multi-line stacks and paragraph hints into a single-line JSON-y blob)
with a workflow-aware formatter that composes the entire log line
into a single string passed to console.error / console.warn.

Highlights of the new output:
- Per-run / per-step IDs render with their parsed friendly names so
  users see `wrun_… · simple (./workflows/1_simple)` instead of just
  the raw `workflowName: 'workflow//./workflows/1_simple//simple'`.
- Color-coded attribution badge (user error red / sdk error magenta)
  paired with the error class in bold.
- Hints render as a paragraph under `hint:` rather than a backslash-
  `\n`-escaped string.
- Drops redundant fields (errorStack always; errorMessage when it's
  already in the parent message) to avoid double-printing.
- Unknown fields fall through as a sorted `key  value` tail so we
  never silently drop log information.

@workflow/errors/ansi gains bold/red/magenta helpers used by the
formatter. The web / web-shared packages don't consume stderr — they
read structured event payloads from the World event log — so this is
presentation-only at the runtime layer.

* ci(benchmarks): disable pnpm cache for getCommunityWorldsMatrix

The job never runs `pnpm install` (it just calls `node` against a
checked-in script), so the pnpm store path never exists. The post-job
`actions/setup-node@v4` cache-save then fails with `Path Validation
Error: Path(s) specified in the action for caching do(es) not exist`
and red-X's the entire job even though the matrix step succeeded.

The setup-workflow-dev composite already has a `cache-pnpm` opt-out
input for this exact case — wire it through here.

* Address PR review comments: inspect dedup, cause leak, retry-loop tests

- ContextViolationError: util.inspect(err) duplicated every framed detail
  line because the stack-tail strip only sliced the first message line.
  V8's Error.stack reads `Name: messageLine1\n  messageLine2\n  at ...`,
  so for our multi-line `title\n╰▶ docs: …` messages every detail line
  was getting prepended twice (once in the pretty form, once via the
  unsliced message tail). Count the actual message lines and slice past
  all of them. Repro test asserts `╰▶ docs:` appears exactly once.

- WorkflowError: stop assigning `cause: undefined` as an enumerable own
  property when no cause is provided. Subclasses (every error in this PR)
  inherit the parent constructor; the unconditional assignment polluted
  `util.inspect(err)` output with `{ cause: undefined, … }` on every
  no-cause instance. The `super(...)` call already conditionally sets
  `.cause` non-enumerably when `options.cause` is provided.

- step-handler.test.ts: add a regression-gate suite that exercises the
  fatal-vs-retryable retry-loop wiring directly. Asserts that an error
  with `fatal: true` produces exactly one `step_failed` event with no
  `step_retrying`, and that a non-fatal `Error` retries via
  `step_retrying` on early attempts and emits `step_failed` once the
  retry budget is exhausted. Catches the silent-regression case where
  `fatal = true` is removed from a context-violation error class but
  the `FatalError.is()` unit tests stay green.

* Consolidate changesets + remove pr-artifacts

Address review feedback to drastically shorten the changesets — fold
the 15 file-by-file entries into a single user-facing changeset for
@workflow/core / errors / builders / utils. Also drop the pr-artifacts/
folder (reviewer-only log captures, no longer needed).

* Polish runtime error logging: layout, stack trim, hint consolidation

Five user-driven fixes from manual smoke-testing of #1849:

1. Logger layout. composeLogLine() now puts the structured-fields block
   (attribution badge, run/step IDs, error code) **between** the framing
   line and the stack body, instead of after it where 30+ lines of stack
   buried the most useful information. The framing stays at the top,
   stack at the bottom, structured info readable at a glance.

2. Stack trim. Drops framework-internal frames (`node_modules/.pnpm/`,
   `node:internal/`, Turbopack-bundled `node_modules__pnpm_*` chunks,
   `_next_dist_*` chunks) and caps the surviving frame count at 6
   so the stack stays compact even on heavy async wrappers. Suppressed
   runs emit one summary line so users know the trim happened.

3. Wrapper-route noise. The nextjs-turbopack workbench's start route
   was catching `WorkflowRunFailedError` rejection on
   `Promise.race([readLoop(), run.returnValue])` and re-logging it via
   `console.error('Error in workflow stream:', error)` plus
   `controller.error(error)` — which then triggered Next.js's
   `⨯ failed to pipe response` overlay. The SDK already logs the
   failure cleanly upstream and the runId is on the response header, so
   the wrapper now closes the SSE stream cleanly on
   WorkflowRunFailedError.

4. Consistent framed `╰▶ hint:` / `╰▶ docs:` layout for all errors
   that carry a hint or docs slug. WorkflowError, SerializationError,
   and WorkflowBuildError now share one `appendFramedDetails` helper
   matching the box-drawing structure that ContextViolationError
   already used. Was: blank-line-separated `Learn more: <url>`. Now:
   one tree, indistinguishable from context-violation rendering.

5. Drop the duplicate logger-side `hint` field. Hints now live on the
   error message only — actionable hints get serialized into the event
   log, rehydrated on the workflow side, and shown in observability
   automatically. The previous logger-only hint duplicated stderr but
   never made it past the step boundary.

   Updated SerializationError hint to point at the foundations doc
   ("Ensure you're returning workflow serializable types. Check the
   serialization docs to see what's serializable:
   https://workflow-sdk.dev/docs/foundations/serialization") instead
   of the hardcoded `(plain objects, arrays, primitives, …)` list,
   which drifted out of sync as the supported types grew. Same hint
   reuses for step args, workflow args/return, stream messages, and
   any other site that goes through `formatSerializationError`.

Also retitled the retry summary `3 retries` → `3 max retries` since
"3 retries" next to "4 attempts" was ambiguous (already-happened vs.
budget).

* Trim error-card title + drop machine step name from persisted error

- ErrorStackBlock (web observability): show just the first non-empty
  trimmed line of the error message in the card title with single-line
  truncation. Multi-line messages (`Failed to serialize step return
  value\n╰▶ hint: …`) were rendering the entire framed body in the
  title, pushing the copy button off-screen and burying the
  scannability of the headline. Full message stays in the body via
  the stack (V8 prepends `Name: message` to `Error.stack`), so no
  information is lost; hover-tooltip exposes the full title text.

- Persisted error message: drop the `Step "step//./.../foo"` machine
  name from `Step failed after N retries: …` and `Step exceeded max
  retries (…)` strings. Observability already attributes the event
  to a specific step via the UI tree, and the CLI logger emits the
  friendly `Step foo (./...) hit max retries` framing on its own
  line. Embedding the raw `step//./...` machine name in the persisted
  message text was duplicate noise.

* Update .changeset/friendlier-errors.md

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>

* Update .changeset/pretty-log-format.md

Co-authored-by: Peter Wielander <mittgfu@gmail.com>
Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>

* Update SerializationError snapshot tests for slug-less message

The class no longer attaches a slug-based `╰▶ docs:` line — the
foundations URL is embedded directly in the hint via the
`formatSerializationError` helper in @workflow/core. Update the test
expectations accordingly:

- bare-title case is now a single line (no docs link)
- hint case renders one `╰▶ hint: …` branch (no second branch)

* Update serialization.test.ts hint assertions for foundations URL

Four `should throw error for an unsupported type` cases were still
asserting on the old hardcoded type list. Update to the new hint
phrasing that points at the foundations doc, matching the change in
`formatSerializationError` (`packages/core/src/serialization/errors.ts`).

---------

Signed-off-by: Pranay Prakash <pranay.gp@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Co-authored-by: Peter Wielander <mittgfu@gmail.com>
2026-05-04 05:04:24 +00:00
Pranay Prakash 072e86bbef Add additional tests for event consumer fixes for hook/sleep/step race conditions (#1528)
Co-authored-by: Peter Wielander <mittgfu@gmail.com>
2026-05-02 07:47:58 +00:00
Nathan Rajlich 74b13cd3ed Add first-class serialization for FatalError and RetryableError (#1513)
* Add WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE to FatalError and RetryableError

Add custom serialization methods to FatalError and RetryableError in
@workflow/errors, enabling the SWC plugin to discover and register them
through the standard class serialization pipeline. This preserves class
identity (instanceof), the fatal flag, and the retryAfter date when
these errors cross serialization boundaries.

- Add @workflow/serde dependency to @workflow/errors
- Add WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE static methods to both classes
- Add unit tests verifying Instance-based round-trip serialization
- Add e2e workflow tests verifying class identity preservation end-to-end

* Address review feedback on FatalError/RetryableError serde

- FatalError: preserve cause property when present (Copilot feedback)
- RetryableError: preserve cause property when present
- RetryableError: serialize retryAfter as numeric timestamp for realm
  safety (the Date reducer uses instanceof global.Date which fails
  across VM realms; timestamps sidestep that issue)
- Replace e2e tests with step return value serialization (step throw
  path always reconstructs errors as FatalError, so those tests don't
  exercise the new serde code path)
- Add unit tests for cause preservation on both classes

* Bump fatal-retryable-error-serialization changeset to minor

Adding WORKFLOW_SERIALIZE / WORKFLOW_DESERIALIZE hooks to FatalError
and RetryableError is a feature, not a bug fix.

* Switch FatalError/RetryableError to first-class serialization

Replace the WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE static methods on
FatalError and RetryableError with dedicated reducers/revivers in the
common serialization module. The Instance/Class pipeline relies on the
SWC plugin discovering classes and registering them by classId, which
means values constructed in environments that don't run the plugin
(vitest e2e runner, ad-hoc Node scripts) can't be deserialized.
Treating FatalError/RetryableError as first-class serialization targets
makes them round-trip from any environment with no setup, matching the
behavior of TypeError, RangeError, etc. added in the previous commit.

- Drop @workflow/serde dependency on @workflow/errors
- Remove WORKFLOW_SERIALIZE/DESERIALIZE statics from FatalError/RetryableError
- Add FatalError/RetryableError reducers to serialization/reducers/common.ts
  with cached base-reducer factories for the subclasses that wrap the
  shared shape (RetryableError, AggregateError)
- Migrate unit tests off registerSerializationClass setup
- Extend the errorSubclassRoundTripWorkflow e2e test to cover FatalError
  and RetryableError, and drop the parallel errorFatalSerdeRoundTrip /
  errorRetryableSerdeRoundTrip tests

* Address review feedback on FatalError/RetryableError serde

- Soundness: split makeErrorSubclassReducer into a shared base helper
  (reduceErrorBase / reduceNamedErrorSubclassBase returning the
  BaseErrorPayload shape) plus a thin wrapper constrained to subclass
  keys whose serialized shape is exactly that base payload. The
  AggregateError and RetryableError reducers — which extend the base
  with extra fields — now consume reduceNamedErrorSubclassBase
  directly instead of calling makeErrorSubclassReducer with an
  unsound type cast. The compiler now rejects accidental misuse
  (SimpleErrorSubclassKey type guard).
- Realm safety: RetryableError reviver constructs retryAfter via
  new global.Date(...) to match the rest of the module and ensure
  the resulting Date passes instanceof global.Date checks in the
  target realm.
- Test strength: assert serialized payloads contain the literal
  devalue marker ["FatalError",N] / ["RetryableError",N] rather
  than the bare class name (which would also match a generic Error
  payload whose name happens to be "FatalError"). Also assert the
  generic ["Error",N] marker is absent.

* Match Error subclass reducers by `value.name`, not constructor name

Bundlers like Turbopack compile `export class FatalError extends Error
{...}` into a registration call like `e.s(["FatalError", 0, class
extends Error {...}])` — passing an anonymous class expression as a
function argument. The resulting constructor function has `name === ''`,
which broke the previous `value.constructor?.name === subclassName`
match: an instance of the bundled FatalError class no longer matched the
dedicated FatalError reducer and instead fell through to the generic
`Error` reducer, losing class identity across the workflow boundary.

This was caught by the local-prod CI matrix, where each Next.js route
gets its own bundled chunk: a real `new FatalError('fatal!')` returned
from a workflow was serialized as a plain Error and revived without
`instanceof FatalError` holding on the consumer side.

Switch the match in `reduceNamedErrorSubclassBase` to `value.name`,
which:
- works for built-in subclasses (TypeError/RangeError/… all set
  `name` automatically and aren't bundled, so behavior is unchanged
  in practice).
- works for FatalError/RetryableError, whose constructors set
  `this.name` explicitly — robust across realms AND bundlers.
- is consistent with how `FatalError.is()` / `RetryableError.is()`
  already identify their values.

Two existing cross-VM Error tests (added in #1164) used `name = 'FatalError'`
on a plain Error to stand in for any cross-realm error — which now hits
the dedicated FatalError reducer (returning a host-realm FatalError)
instead of the generic Error reducer (which constructs a VM-realm Error).
Renamed the stand-in to `'CustomError'` so they continue to exercise the
intended path.
2026-05-01 20:36:08 +00:00
Nathan Rajlich e7ea0684f4 Add first-class serialization for built-in Error subclasses (#1511)
* Add first-class serialization for built-in Error subclasses

Replace the generic Error reducer/reviver with specific handlers for
TypeError, RangeError, SyntaxError, URIError, ReferenceError, EvalError,
and AggregateError. Preserve the cause property on all Error types,
only serializing it when present to maintain absence vs presence
semantics.

* Refactor Error subclass reducers/revivers with helper functions

Extract repetitive reducer/reviver logic into makeErrorSubclassReducer
and makeErrorSubclassReviver helpers. Reduces ~120 lines of duplicated
code to ~50 while preserving identical behavior. AggregateError remains
as a wrapping extension since it needs to preserve the errors array.

* Bump error-subclass-serialization changeset to minor

Adding new serialization support for built-in Error subclasses is a
feature, not a bug fix.
2026-05-01 18:39:01 +00:00
Nathan Rajlich 9f3516ec28 Refactor: Extract serialization into modular architecture and wire into existing pipeline (#1299)
* Add serialization module foundation: types, codec interface, format prefix

Start of the serialization refactor (separate from snapshot-runtime).

New files:
- serialization/types.ts — SerializationFormat enum, SerializableSpecial
  interface, Reducers/Revivers types
- serialization/codec.ts — Codec interface with formatPrefix, serialize,
  deserialize, and optional deserializeLegacy
- serialization/format.ts — Format prefix encode/decode/peek, moved from
  the monolithic serialization.ts

The Codec interface enables future alternative formats (CBOR, JSON) while
keeping the devalue implementation as the current default.

* Add reducers, devalue codec, encryption, and mode-specific modules

Serialization refactor Phase 1: create the new module structure alongside
the existing monolithic serialization.ts (which continues to work).

New files:
- serialization/reducers/common.ts — Date, Error, Map, Set, URL, BigInt,
  typed arrays, Headers, Request, Response, RegExp, URLSearchParams
- serialization/reducers/class.ts — Class/Instance with WORKFLOW_SERIALIZE/
  DESERIALIZE support
- serialization/reducers/step-function.ts — StepFunction with closure vars
- serialization/codec-devalue.ts — devalue Codec implementation
- serialization/encryption.ts — composable encrypt/decrypt layer
- serialization/workflow.ts — synchronous, no encryption, for VM use
- serialization/step.ts — async with encryption, for step handler
- serialization/client.ts — async with encryption, for start() API
- serialization/index.ts — re-exports all public API
- serialization/serialization.test.ts — 25 focused tests

All modes compose their reducer/reviver sets from the shared building blocks.
Cross-mode compatibility verified: data serialized in any mode can be
deserialized in any other mode (for common types).

Existing 108 serialization tests continue to pass unchanged.

* Add sub-path exports for workflow serialization module

- Add ./serialization/workflow export to @workflow/core package.json
- Add ./internal/serialization re-export to workflow meta-package
- The workflow bundle can now import serialize/deserialize via:
  import { serialize, deserialize } from 'workflow/internal/serialization'

Full test suite passes: 493 tests across 22 files (including 25 new
serialization module tests).

* Address code review feedback

1. Fix reducer composition order: Class/Instance reducers now come BEFORE
   common reducers in all three modes (workflow, step, client). This ensures
   custom Error subclasses with WORKFLOW_SERIALIZE are handled by the
   Instance reducer before the generic Error reducer (devalue uses
   first-match-wins semantics).

2. Fix encryption decrypt() to fail fast when encrypted data is encountered
   without a decryption key, instead of silently returning encrypted bytes
   that would fail later with an unhelpful format error.

3. Remove Request/Response from common reducers — they don't have matching
   common revivers, so including them caused asymmetric behavior (serialize
   as Request, deserialize as plain object). Request/Response handling
   belongs in mode-specific modules that can provide proper revivers.

4. Document Node.js dependency in the workflow serialization re-export.
   The current implementation uses node:util and Buffer. For the QuickJS
   VM (snapshot runtime), these will need polyfills — tracked separately.

* Move reducer/reviver composition into the devalue codec

The Codec interface now takes a SerializationMode ('workflow', 'step',
'client') instead of raw reducers/revivers. The reducer/reviver
composition is internal to the devalue codec implementation.

This is the right abstraction because reducers/revivers are devalue-
specific concepts. A future CBOR codec would handle Date, typed arrays,
Map, Set natively via the CBOR type system — it wouldn't use reducers
at all. A JSON codec would only support standard JSON types.

The mode-specific modules (workflow.ts, step.ts, client.ts) are now
simpler — they just pass the mode string to the codec.

* Replace SerializationFormatType enum with open-ended FormatPrefix type

The format prefix is now a branded string type validated by
isFormatPrefix() — any 4-character [a-z0-9] string is valid.
This removes the hard-coded enum of known formats, making the system
truly open for extension:

  type FormatPrefix = string & { __brand: 'FormatPrefix' };
  function isFormatPrefix(value: string): value is FormatPrefix;

The SerializationFormat object still provides well-known constants
('devl', 'encr') but they're now just typed constants, not an
exhaustive enum.

peekFormatPrefix() and decodeFormatPrefix() use isFormatPrefix() for
validation instead of checking against a known list. Unknown but valid
prefixes (e.g. 'cbor', 'json', 'v2b1') are accepted — the caller
decides whether they can handle the format.

6 new isFormatPrefix tests covering: valid strings, too short, too long,
uppercase, special characters. 1 new test for unknown-but-valid prefixes.

* Wire modular serialization modules into serialization.ts, add 138 unit tests

Replace duplicate format prefix, reducer/reviver, and encryption helper
code in the monolithic serialization.ts with imports from the modular
serialization/ directory. This completes the refactoring started in the
earlier additive-only commits.

Key changes:
- serialization.ts now imports types, format prefix, common/class/step-function
  reducers and revivers, and encryption helpers from ./serialization/ modules
- Removed ~450 lines of duplicate code from serialization.ts
- Made encryption error messages consistent between old and new modules
- Added 138 comprehensive unit tests covering types, format prefix,
  encryption, codec, all three reducer modules, all three mode modules,
  cross-mode compatibility, and edge cases
- Updated one existing test assertion for new error message wording

* Address code review feedback

- encryption.ts: throw WorkflowRuntimeError instead of plain Error in
  decrypt() to preserve the error contract from legacy maybeDecrypt()
- format.ts: document that open-ended prefix validation ([a-z0-9]{4})
  is intentional for forward compatibility — callers check support
- errors.ts: extract duplicated formatSerializationError into shared
  utility, remove 4 copies from workflow.ts, step.ts, client.ts
- codec-devalue.ts: document that globalThis default is a known
  limitation; legacy dehydrate/hydrate path still supports custom global

* Fix codec-devalue.ts comment: clarify modular modules are not used in current runtime

The globalThis default is not a limitation for the current runtime —
all serialization goes through dehydrate*/hydrate* in serialization.ts
which passes the correct global. The modular modules are infrastructure
for the future snapshot runtime where serialization runs inside the VM.

* Wire dehydrate/hydrate functions through modular serialize/deserialize

The dehydrate*/hydrate* functions in serialization.ts now delegate to
the modular mode modules (workflowModule, stepModule, clientModule)
instead of directly calling devalue stringify/parse/unflatten.

Key changes:
- Extended Codec interface with CodecOptions (global, extraReducers,
  extraRevivers) so the codec can receive VM globals and mode-specific
  stream/Request/Response handlers
- devalueCodec threads global through to all reducer/reviver factories
  so instanceof checks work across VM boundaries
- Mode modules (workflow.ts, step.ts, client.ts) accept CodecOptions
  and pass them through to the codec
- dehydrate*/hydrate* functions now call module serialize/deserialize
  with stream and Request/Response reducers/revivers passed as extras
- v1Compat path remains inline (pre-codec, uses stringify + revive)
- Error context strings preserved via try/catch re-wrapping

* Bump changeset from patch to minor for serialization refactor

Return types of public get*Reducers/get*Revivers functions narrowed
from Reducers/Revivers to Partial<Reducers>/Partial<Revivers>, which
is a TypeScript-level breaking change. Also adds new sub-path exports
(@workflow/core/serialization/workflow, workflow/internal/serialization)
which is additive. Minor bump is the appropriate semver for both.

* Remove unused workflow/internal/serialization re-export and @workflow/core/serialization/workflow sub-path

Both exports had zero consumers in the repo. The workflow/internal/serialization
export was previously removed on main in #1082 for the same reason. The
modular workflow.serialize/deserialize is still reachable via
@workflow/core/serialization when needed. These exports can be reintroduced
by the snapshot runtime branch if/when it actually needs them.

Also updates the changeset to drop the 'new sub-path exports' bullet.

* Downgrade changeset from minor to patch

After auditing actual consumers of the narrowed return types
(getExternalReducers/getWorkflowReducers/getExternalRevivers/getWorkflowRevivers
now return Partial<Reducers>/Partial<Revivers>), no in-repo or external
consumer indexes specific keys on the returned object in a way that would
break. The only internal caller that did (runtime/run.ts) was updated in
this same PR. The narrowing is type-safer but effectively invisible at
runtime and for idiomatic callers that spread or forward the object.
Since the refactor is internally restructuring only, patch is the
appropriate semver bump.

* Trim serialization-refactor changeset

* Dedup formatSerializationError: import from serialization/errors.ts

The legacy serialization.ts had its own inlined copy of
formatSerializationError. Now that the helper is exported from
serialization/errors.ts (already consumed by workflow.ts/step.ts/client.ts),
import it here too to keep the single source of truth.
2026-05-01 09:54:08 +00:00
Pranay Prakash 7d07fab692 Replace eval with JSON.parse in serialization revive helper (#1848)
* Replace eval with JSON.parse in serialization revive helper

devalue.stringify() always produces valid JSON — special values
(undefined, NaN, Infinity, -0) are encoded as negative integer
sentinels. JSON.parse yields the same flattened array form that
unflatten() expects, without the eval anti-pattern (VULN-918).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Drop redundant workflow package from changeset

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
2026-04-28 22:58:24 +00:00
Pranay Prakash e295bae417 feat: allow start() to be called directly inside workflow functions (#1491)
* feat: allow start() to be called directly inside workflow functions

Add 'use step' to start() so it can be called directly from workflow
code. The SWC compiler strips the function body in workflow mode and
replaces it with a step proxy. When called from a workflow:

1. The workflow function reference is serialized via WorkflowFunction
   reducer (serializes { workflowId })
2. start() executes in the step context with full Node.js access
3. The returned Run is serialized via WORKFLOW_SERIALIZE and deserialized
   back in the workflow VM
4. Run getters (.status, .returnValue, etc.) are 'use step' getters
   that each execute as separate steps

Also re-exports start from @workflow/core/runtime/start in api-workflow.ts
instead of using a throwing stub, adds e2e tests for startFromWorkflow
(with hook communication) and fibonacciWorkflow (recursive composition).

* fix(next): don't copy package step files in deferred builder to avoid duplicate classes

Files belonging to packages (detected by walking up to find a
package.json with a name field) are imported via relative path
instead of being copied to __workflow_step_files__/. Copying creates
a second module instance which breaks JS native private field (#)
brand checks when the runtime creates instances from one copy and
the step handler accesses fields from the other.

* fix(next): only skip copying package files that are serde classes, not all package step files

Regular package step files (like fetch) must still be copied to ensure
the SWC loader registers them. Only serde class files from packages are
excluded from copying since those define classes with JS native private
fields (#) that break when duplicated.

* fix(next): generate thin wrappers for package serde step files instead of full copies

For package files that define serde classes (like Run), generate a thin
wrapper that imports the original class and registers steps/classes from
the manifest. This avoids duplicating the class definition (which breaks
JS native private field brand checks) while still registering all step
functions and the class in the serialization registry.

Regular package step files (like fetch) are still copied as before.

* fix(next): use forceStepModeFiles to transform package serde files in step mode

Instead of copying package serde+step files (which creates duplicate
classes with #private brand check issues) or generating fragile wrappers,
add the original file paths to a shared forceStepModeFiles set. The
loader checks this set and transforms those files in step mode directly,
so the SWC plugin generates proper step registrations on the original
class — no duplication, no reimplemented registration logic.

* fix(next): use step mode for all files with step/serde patterns, not just copies

The loader now selects step mode for any file that has 'use step'
directives or serde patterns, regardless of whether it's a deferred
step copy. Step mode is a superset of client mode — the only addition
is step registry IIFEs, which are harmless for non-step consumers.

This means package serde+step files (like Run) no longer need to be
copied to get step registrations. They're imported directly in the
step route and the loader transforms the original file in step mode.
One class instance, no duplication, no wrapper generation.

---------

Co-authored-by: Nathan Rajlich <n@n8.io>
2026-04-17 07:40:25 -07:00
Nathan Rajlich b7d6595c25 fix false-positive unconsumed event in hook loop replay (#1778) 2026-04-16 15:05:27 -07:00
Nathan Rajlich 173756dc4d [docs] Rename workflowdevkit to workflowsdk and useworkflow.dev to workflow-sdk.dev (#1759)
* [docs] Rename workflowdevkit references to workflowsdk

* [docs] Rename useworkflow.dev to workflow-sdk.dev

* [chore] Add changeset for domain rename

* [docs] Revert sitemap rewrite to useworkflow.dev (crawled-sitemap not yet available for new domain)
2026-04-15 18:01:48 -07:00
Peter Wielander 0810b75872 [core] Re-try runtime replays that exceed deadline up to three times (#1740) 2026-04-15 14:26:27 -07:00
Nathan Rajlich ac09f40771 feat: add clickable Run reference rendering in observability UI (#1681)
* feat: add clickable Run reference rendering in observability UI

When a serialized Run object appears in step input/output data, it is
now rendered as a clickable purple badge showing the runId. Clicking
navigates to the target run's detail page.

Changes:
- serialization-format.ts: Add RunRef type, isRunRef(), serializedRunToRunRef(),
  and 'Run' entry in observabilityRevivers
- data-inspector.tsx: Add RunRefInline component (purple badge), RunClickContext,
  collapseRefs() to make refs non-expandable in ObjectInspector
- attribute-panel.tsx: Thread onRunClick prop, wrap in RunClickContext.Provider
- entity-detail-panel.tsx: Thread onRunClick prop
- run-trace-view.tsx: Thread onRunClick prop
- workflow-trace-view.tsx: Thread onRunClick prop, reset selected span on run change
- trace-span-construction.ts: Show step name for builtin steps instead of empty string
- hydration.ts: Re-export RunRef types
- run-detail-view.tsx: Add handleRunRefClick that navigates to /run/{targetRunId}

* fix: guard collapseRefs against class instances and memoize result

Only recurse into plain objects (prototype is Object.prototype or null)
to avoid stripping class instances like Date, Error, Map, etc. that
have their own rendering in NodeRenderer. Also memoize the collapsed
result to avoid recomputing on every render.

* fix: detect Run instances in Instance reviver instead of fake Run serde key

The Run class goes through the standard Instance serialization pipeline
(WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE), not a dedicated 'Run' key.
Move the RunRef detection into serializedInstanceToRef() which checks
if the className is 'Run' and the data contains a runId string, then
returns a RunRef instead of a generic ClassInstanceRef.

* fix: use serializedInstanceToRef in web and CLI Instance revivers

Both the web and CLI hydration layers override the observabilityRevivers
Instance handler with their own implementation (for react-inspector
named constructors and CLI inspect.custom respectively), bypassing the
RunRef detection in serializedInstanceToRef. Fix by calling
serializedInstanceToRef first and returning a RunRef when detected.
2026-04-14 21:09:49 +00:00
Karthik Kalyan df115fde8c [web][web-shared][core] Make encrypted markers clickable and detect encryption before span selection (#1716)
* Make encrypted markers clickable to trigger decryption and detect encryption at run level before span selection

* Make encrypted markers clickable to trigger decryption and detect encryption at run level before span selection

* Make encrypted markers clickable to trigger decryption and detect encryption at run level before span selection

* Make encrypted markers clickable to trigger decryption and detect encryption at run level before span selection

* Make encrypted markers clickable to trigger decryption and detect encryption at run level before span selection
2026-04-13 17:11:58 -07:00
Nathan Rajlich 9513a8160c feat(core): add serialization support for workflow function references (#1677)
* feat(core): add serialization support for workflow function references

Add a WorkflowFunction reducer/reviver pair so that workflow function
references (functions with a .workflowId property, as produced by the
SWC compiler) can cross the step serialization boundary.

Reducer: detects functions with a .workflowId string property, serializes
as { workflowId }. Only matches functions (not plain objects) to prevent
infinite recursion since the reduced form is a plain object.

Reviver: deserializes as a plain { workflowId } metadata object, which
start() already accepts via its WorkflowFunction | WorkflowMetadata
parameter type.

Also adds an observability reviver that renders as '<workflow:workflowId>'.

* fix: address review feedback - fix error assertion, add o11y reviver test
2026-04-09 23:04:16 -07:00
Nathan Rajlich ea97bd6007 fix(core): remove redundant hc_ prefix from health check correlationId (#1678)
The correlationId was generated as hc_${generateId()}, but
generateHealthCheckRunId() already adds wrun_hc_, producing
wrun_hc_hc_... Similarly, getHealthCheckStreamName() adds
__health_check__, making the hc_ prefix in correlationId redundant.
2026-04-09 23:35:38 +00:00
Nathan Rajlich 71d39d2f8d fix: serialize Run across runtime and workflow VM (#1616)
* feat: serialize Run via custom class serialization with "use step"

Single Run class implementation:
- Add WORKFLOW_SERIALIZE/WORKFLOW_DESERIALIZE to core Run class
- Mark all runtime-dependent methods/getters with "use step" so SWC
  strips their bodies from the workflow bundle
- Remove duplicate Run stub from api-workflow.ts; re-export core Run
- SWC auto-registers the class (no manual registerSerializationClass)
- Add e2e test for Run serialization across workflow/step boundaries
- Add unit tests for serde roundtrip

* chore: bump changeset to minor (new feature)

* fix: include resilientStart in Run serde payload and add readable getter comment

* .

* fix: remove eager getWorld() from constructor, rely on lazy getter
2026-04-09 15:10:45 -07:00
Peter Wielander 873b4e2bb4 [core] Refactor getWorld interface to be asynchronous (#942) 2026-04-09 13:54:32 -07:00
Peter Wielander 66d49c0db6 [world] Restructure stream interface, require run ID for all step and stream operations (#1293) 2026-04-09 13:25:16 -07:00
Nathan Rajlich ec517fa225 Add features.encryption to WorkflowMetadata (#1652)
* Add features.encryption to WorkflowMetadata

Expose a `features` object on `getWorkflowMetadata()` so library
authors can detect at runtime whether encryption is enabled for the
current workflow run, allowing them to conditionally handle sensitive
data serialization.

* Improve docs example: show workflow-level encryption check

Step inputs are serialized before the step body runs, so the encryption
check should happen in the workflow function before passing data to
steps.

* Fix docs example: show encryption check on step return value

Step return values are serialized to the event log after the step body
runs, so this is where the check is actually useful - controlling what
data gets persisted as output.

* Fix docs typecheck: declare external function in code sample

* minor
2026-04-09 00:46:03 +00:00
Nathan Rajlich 0a86de3afd Inline all SWC plugin step registrations, remove workflow/internal/private (#1632)
The SWC compiler plugin no longer generates import statements. All step
function registrations and closure variable access are now self-contained
inline IIFEs with zero module dependencies
2026-04-08 16:58:17 -07:00