(MOT-4368) feat(e2e): surface semantic validation health

[ytallo]

Summary

• fail fast on invalid Harness E2E manifests, lockfiles, providers, and expected binaries before cache, install, lint, test, or compilation work
• publish schema 3 execution history with semantic statuses, exact run-attempt identity, and the first failed GitHub job or step when reports are unavailable
• move latest operational health above efficiency and trends in the Pages dashboard
• retain schema 2 compatibility while projecting all public detail through an allowlist that excludes prompts, transcripts, model responses, and tool payloads
• paginate workflow-job diagnostics beyond 100 results

Why

Build and setup failures currently consume most of the workflow before exposing a lockfile or manifest problem, while the public dashboard can collapse distinct operational outcomes into a generic failure. Operators need a quick, safe view of what happened without publishing sensitive execution content.

Impact

The daily public lane gains actionable health and compact diagnostics. Quality-only misses remain advisory, hard and technical failures stay blocking, and rerun artifacts cannot be attached to the wrong attempt.

Validation

• real preflight against 13 current source manifests
• 5 manifest-preflight unit tests
• 13 publisher cases and 8 collector semantic cases
• 4 dashboard data/structure tests and 4 local server tests
• Python compilation, workflow YAML parsing, actionlint, and diff checks

Refs MOT-4368

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
workers	Ready	Preview	Aug 6, 2026 3:47pm
workers-tech-spec	Ready	Preview	Aug 6, 2026 3:47pm

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 39f802d6-4710-47df-9100-4113ba7b7fe1

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}