fix(web-shared): snapshot generic iterables

[mitul-s]

Why

Live iterators can lose values when React renders or compares them more than once. Generic iteration can also block the inspector because it has no item limit.

Scope

The first commit adds browser-level regressions for repeated renders, replacement iterators, bounded consumption, truncation, and malformed entries() methods. The implementation will follow in a separate commit.

Blast Radius

The tests cover DataInspector in @workflow/web-shared. No runtime code changes in this revision.

Verification

The focused regression run follows this pre-test commit.

PR Checklist - Required to merge

• 📦 pnpm changeset was run to create a changelog for this PR
• 🔒 Commits include DCO sign-off
• 📝 Ping @vercel/workflow in a comment once the PR is ready, and the above checklist is complete

  

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview, v0	Aug 28, 2026 7:47pm
example-nextjs-workflow-webpack	Ready	Preview, v0	Aug 28, 2026 7:47pm
example-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-astro-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-express-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-fastify-workflow	Building	Preview, v0	Aug 28, 2026 7:47pm
workbench-hono-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-nestjs-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-nitro-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-nuxt-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-python-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-sveltekit-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-tanstack-start-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workbench-vite-workflow	Ready	Preview, v0	Aug 28, 2026 7:47pm
workflow-docs	Ready	Preview, v0	Aug 28, 2026 7:47pm
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workflow-tarballs	Ready	Preview, v0	Aug 28, 2026 7:47pm
workflow-web	Ready	Preview, v0	Aug 28, 2026 7:47pm

[changeset-bot]

⚠️ No Changeset found

Latest commit: 05cf507

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

Sim World

Simulated world deterministic testing for races. Traces

🟠 world-sim scenario book — 1 fail of 41 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
✅ 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