fix(ci): make Registry Harness E2E executable

[ytallo]

Summary

• coerce the workflow_dispatch runs input to the numeric type required by the reusable workflow
• load the scenario validator from the workflow revision while testing historical release source
• serialize Registry provisioning to avoid parallel bootstrap overload

Validation

• actionlint v1.7.12
• Registry E2E run 31618785914 compiled the exact Harness release source and materialized the requested scenario matrix
• the run installed the exact harness 1.8.1 Registry stack and then exposed the separate provider registration token mismatch

The E2E product result is intentionally not claimed as green: scored_runs remained 0 because provider registration failed before scenario execution.

Summary by CodeRabbit

• Chores
  • Improved end-to-end workflow validation by using the validator from the workflow revision.
  • Updated registry end-to-end test execution to use JSON-based run configuration.
  • Limited registry end-to-end tests to a single parallel job for more consistent execution.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
workers	Ready	Preview	Aug 12, 2026 4:59pm
workers-tech-spec	Ready	Preview	Aug 12, 2026 4:59pm

[github-actions]

skill-check — worker

0 verified, 57 skipped (no docs/).

Layer	Result
structure	✓
vale	✓
ai	✓
render	✓

Four for four. Nicely done.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 5f2fa06e-2a63-4ddd-b1d9-c28cfd064c95

📥 Commits

Reviewing files that changed from the base of the PR and between a6dfe06 and ad37dd0.

📒 Files selected for processing (2)

• .github/workflows/_harness-e2e.yml
• .github/workflows/harness-e2e-registry.yml

---

📝 Walkthrough

Walkthrough

The E2E build now validates scenarios with the validator from the workflow revision. The registry workflow passes a JSON-derived runs value and limits parallel execution to one job.

Changes

E2E workflow controls

Layer / File(s)	Summary
Workflow-pinned scenario validation .github/workflows/_harness-e2e.yml	The build job sparsely checks out the validator from github.sha and runs it from _workflow/.github/scripts.
Registry execution controls .github/workflows/harness-e2e-registry.yml	The reusable workflow receives runs through JSON conversion and uses max_parallel: 1.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• iii-hq/workers#679: Introduced the related _harness-e2e.yml workflow.
• iii-hq/workers#692: Also changes checkout and validation behavior in _harness-e2e.yml.
• iii-hq/workers#719: Directly modifies validation and execution behavior in _harness-e2e.yml.

Suggested labels: no-ticket

Poem

A rabbit checks the workflow trail,
With validator tucked in a pail.
One registry run hops through,
JSON guides what it must do.
Parallel paws now wait in line.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main CI change: making the Registry Harness E2E workflow executable.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/harness-e2e-runs-input

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