[schema-coverage] feat: add schema coverage demo for runs-on-slim field

[github-actions]

Summary

Adds a schema coverage demo file for the runs-on-slim frontmatter field, contributing to 100% schema feature coverage in the demo suite.

Changes

schema-demos/schema-demo-runs-on-slim.md (added)

• New demo workflow document illustrating usage of the runs-on-slim frontmatter schema field.
• Serves as both documentation and a coverage artifact, ensuring the field is represented in the schema demo suite.

Impact Assessment

Dimension	Assessment
Breaking change	No
Impact	Low — documentation/demo only; no runtime or production code modified
Testing needed	None required — file is a markdown demo artifact

Checklist

• Single-purpose commit (feat: add schema coverage demo for runs-on-slim)
• No breaking changes
• No production code modified
• Advances schema coverage completeness goal

Generated by PR Description Updater for issue #36206 · sonnet46 852.4K · ◷

[github-actions]

🧠 Matt Pocock Skills Reviewer has completed the skills-based review. ✅

[github-actions]

✅ PR Code Quality Reviewer completed the code quality review.

No action needed: PR #36206 is already merged and contains only a single trivial markdown demo file (schema-demos/schema-demo-runs-on-slim.md) that demonstrates the runs-on-slim frontmatter field. No code, logic, or structural changes to review.

[github-actions]

✅ Design Decision Gate 🏗️ completed the design decision gate check.

No ADR enforcement needed for PR #36206: the PR does not carry the 'implementation' label and has 0 new lines of code in business logic directories (well under the 100-line threshold). Neither Condition A (implementation label) nor Condition B (>100 business-logic additions) is met.

[Copilot]

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[github-actions]

🧪 Test Quality Sentinel completed test quality analysis.

No test files were added or modified in this PR. The only changed file is schema-demos/schema-demo-runs-on-slim.md (a markdown schema demo). Test Quality Sentinel skipped.

[github-actions]

Skills-Based Review 🧠

Applied /grill-with-docs — this auto-generated schema coverage demo is clear, minimal, and follows the existing schema-demos/ pattern. No blocking issues.

📋 Key Themes & Highlights

Positive Highlights

• ✅ Follows the established demo file naming convention (schema-demo-*.md)
• ✅ Minimal frontmatter with appropriate permissions (contents: read) and timeout
• ✅ Clear inline explanation of what runs-on-slim does
• ✅ Correctly uses noop safe-output — no unintended side-effects

Minor Observation

The runner value ubuntu-slim may not exist as a real GitHub-hosted runner label. Depending on schema validation, this could cause a compile warning. If the intent is to demonstrate a custom/self-hosted slim runner label, a brief note in the description would help readers understand the value is illustrative.

🧠 Reviewed using Matt Pocock's skills by Matt Pocock Skills Reviewer · sonnet46 1M