Extract Design Decision Gate ADR report templates into an on-demand inline skill

[Copilot]

The Daily Ambient Context Optimizer flagged Design Decision Gate as the largest sampled first request (33,055 chars — nearly double the other sampled workflows), driven by three large <details>-heavy report templates inlined in the prompt body even though at most one is used per run.

Changes

• .github/workflows/design-decision-gate.md
  • Moved the ADR Required (~45 lines), ADR Verified (~11 lines), and Implementation Diverges (~25 lines) templates verbatim into a single ## skill: adr-report-templates block at the end of the file.
  • Step 4a and Step 4b now point at the skill instead of carrying the template text.
• .github/workflows/design-decision-gate.lock.yml — regenerated; single-line gh-aw-metadata body_hash update, no other lock files affected.

Inline skills are extracted at setup time by actions/setup/js/extract_inline_skills.cjs and stripped from the main prompt, so the templates are read on demand rather than shipped on every run. Mirrors the existing ## skill: test-report-templates pattern in test-quality-sentinel.md.

Before:

### Post a Blocking Comment

Post a comment using `add-comment` explaining the requirement:

```markdown
### 🏗️ Design Decision Gate — ADR Required
... ~45 lines of template ...

After:

### Post a Blocking Comment

Read the `adr-report-templates` skill and post a comment using `add-comment` with the **ADR Required** template.

Prompt body drops 14,717 → 11,467 chars (−22%), verified against the repo's own extractor. Template content is unchanged — this is pure relocation.

Scoped out

Recommendations 2–4 from the issue (shared "What to do next" fragment, extracting the generic efficiency-rules preamble, trimming the grumpy-coder / pr-triage agent blocks) are marked needs manual review and span two additional workflows' review semantics. Left for a follow-up so this stays a single verifiable change.

Note for reviewers

The issue's checklist requires "Do not submit as a draft PR," which conflicts with the standing preference to open PRs in draft. I followed the issue here — say the word if the draft convention should take precedence.

• Fixes [ambient-context] Daily Ambient Context Optimizer - 2026-08-07 #51180

[Copilot]

Pull request overview

Extracts ADR report templates into an inline skill to reduce the Design Decision Gate’s initial prompt size.

Changes:

• Moves three ADR comment templates into an on-demand skill.
• Regenerates workflow metadata.
• However, one combined skill still loads all templates per invocation.

Show a summary per file

File	Description
.github/workflows/design-decision-gate.md	Extracts and references ADR templates.
.github/workflows/design-decision-gate.lock.yml	Updates the generated body hash.

Review details

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• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Balanced

[github-actions]

🎉 This pull request is included in a new release.

Release: v0.86.1