[karthikscale3]

Cancelled workflow runs now use a distinct neutral state in the trace and show their cancellation reason in the run inspector. Runs without a recorded reason show a clear fallback.

https://workflow-hltlg465o.labs.vercel.dev/run/wrun_41M2V2T5Z00GJD4KXXVDWAQ1S5

Tests: pnpm --filter @workflow/web-shared test, pnpm --filter @workflow/web-shared typecheck

[changeset-bot]

🦋 Changeset detected

Latest commit: 23c054d

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

This PR includes changesets to release 16 packages

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

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

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

[vercel]

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Project	Deployment	Actions	Updated
example-nextjs-workflow-turbopack	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
example-nextjs-workflow-webpack	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
example-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-astro-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-express-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-fastify-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-hono-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-nestjs-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-nitro-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-nuxt-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-python-workflow	Building	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-sveltekit-workflow	Canceled	v0	Sep 20, 2026 5:54am UTC
workbench-tanstack-start-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workbench-vite-workflow	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workflow-swc-playground	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workflow-tarballs	Ready	Preview, v0	Sep 20, 2026 5:54am UTC
workflow-web	Ready	Preview, v0	Sep 20, 2026 5:54am UTC

1 Skipped Deployment

Project	Deployment	Actions	Updated
workflow-docs	Skipped	v0	Sep 20, 2026 5:54am UTC

[github-actions]

Sim World

Simulated world deterministic testing for races. Traces

🟠 world-sim scenario book — 1 fail of 42 total

fence=per-spec

scenario	outcome	events	virt	replay	violations
✅ smoke-no-steps	completed	3	0ms	ok	0
✅ smoke-one-step	completed	6	0ms	ok	0
✅ hook-at-step-started	completed	12	0ms	ok	0
✅ hook-at-step-completed	completed	12	0ms	ok	0
✅ hook-at-hook-created	completed	12	0ms	ok	0
✅ deadline-hook-wins	completed	7	1.0h	ok	0
✅ deadline-expires	completed	7	1.0h	ok	0
✅ step-vs-timer-early-settlement	completed	8	1.0h	ok	0
✅ long-sleep	completed	11	30.0d	ok	0
✅ hook-never-arrives	stalled	3	0ms	skipped	0
✅ step-retries-twice	completed	10	2.0s	ok	0
✅ parallel-steps	completed	9	0ms	ok	0
✅ hook-on-execution-state	completed	12	0ms	ok	0
✅ peek-hook-before-branch	completed	12	0ms	ok	0
✅ peek-hook-after-branch	completed	12	0ms	ok	0
✅ peek-hook-at-registration	completed	12	0ms	ok	0
✅ race-hook-before-probe	completed	12	0ms	ok	0
✅ race-hook-after-probe	completed	12	0ms	ok	0
✅ race-duplicate-delivery	completed	13	0ms	ok	0
✅ attr-hook-before-step	completed	11	0ms	ok	0
✅ attr-hook-after-step	completed	11	0ms	ok	0
✅ attr-from-step-body	completed	13	0ms	ok	0
✅ fork-hook-after-timeout	completed	14	1.0m	ok	0
✅ fork-hook-before-timeout	completed	14	1.0m	ok	0
✅ count-hook-after-timeout	completed	17	1.0m	ok	0
✅ count-hook-before-timeout	completed	20	1.0m	ok	0
✅ stale-read-step-count-fork	completed	20	1.0m	ok	0
✅ stale-read-equal-step-counts	completed	14	1.0m	ok	0
✅ step-vs-step-fork	completed	12	0ms	ok	0
✅ step-vs-step-fork-fenced	completed	12	0ms	ok	0
✅ fence-catches-benign-direction	completed	12	5ms	ok	0
✅ in-flight-before-decision	completed	17	1.0m	ok	0
❌ in-flight-before-decision-counted	completed	17	1.0m	ok	0
✅ in-flight-after-decision	completed	19	2.0m	ok	0
✅ stale-read-step-count-fork-fenced	completed	20	1.0m	ok	0
✅ fork-hook-wins	completed	13	1.0m	ok	0
✅ fork-timeout-wins	completed	13	1.0m	ok	0
✅ unclaimed-payload-under-fork	completed	17	1.0m	ok	0
✅ claimed-payload-under-fork	completed	17	1.0m	ok	0
✅ writers-independent-step-bodies	completed	12	0ms	ok	0
✅ writers-scripted-tempo	completed	12	0ms	ok	0
✅ cancel-mid-step	cancelled	7	0ms	skipped	0

Full trace: world-sim.txt

[github-actions]

No backport to stable for 7840c15 (AI decision).

This is UI feature work: it adds a new cancellation-reason surface to the run inspector (new getCancellationReason/useCancellationReason modules, a tooltip on StatusBadge, a new cancelled trace segment status and isSpanCancelled helper), plus a cosmetic restyle of run/event status colors to match Workflow Observability. None of it fixes a user-visible defect on the maintenance line; the color realignment and the --geist-* CSS fallbacks are presentational polish rather than a stability fix. If the fallback values in styles.css are considered a genuine rendering bug on stable, that one hunk could be split out and forced through via workflow_dispatch.

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

7840c15617c801e0df8f0a85145f43de25f96cc4