Files
vercel__workflow/.changeset/sourcemaps-runtime-graceful.md
Pranay Prakash 37312edd0a Default source maps to dev-on / prod-off (#2529)
* Default source maps to dev-on / prod-off

Inline source maps are embedded in the step bundle and the intermediate
workflow VM bundle, which bloats production function bundles (a problem for
the Vercel 250MB limit) even though maps only help when reading a stack trace.

Make the default environment-aware in @workflow/builders: inline in
development (next dev / nitro dev / Vite-based dev servers, detected via
config.watch or NODE_ENV=development) and off in production. The `sourcemap`
config option and `WORKFLOW_SOURCEMAP` env var still override in either
environment. A production build with no override also drops the
source-map-support shim from the Vercel step function.

Keep runtime stack remapping graceful and fast when maps are absent
(@workflow/core): short-circuit when no frame references the workflow file
and memoize the parsed map (or its absence) per bundle, so production failures
don't rescan the bundle.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* test(e2e): make source-map expectations match dev-on/prod-off default

The e2e error-stack tests gate source-map assertions on hasWorkflowSourceMaps()
and hasStepSourceMaps(). Now that source maps default to off in production
builds, update those helpers:

- hasWorkflowSourceMaps(): false for all production builds (local prod,
  postgres, Vercel — keyed off DEV_TEST_CONFIG), and exclude nest in dev (the
  Nest integration builds with watch:false / no NODE_ENV=development, so its
  bundles have no maps).
- hasStepSourceMaps(): nest now resolves to a production build (maps off) in
  both dev and prod.

Add unit cases for the dev-vs-prod and nest behavior.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-18 16:28:26 -07:00

230 B

@workflow/core
@workflow/core
patch

Speed up workflow stack-trace remapping when source maps are absent (production default): skip bundle scanning when no frame references the workflow file and memoize parsed source maps per bundle.