feat(#363): add /map-architecture skill for architecture-deepening reports

[azalio]

Summary

• Adds /map-architecture as a new opt-in skill that ranks codebase areas by recent git hotspot frequency and design-friction signals, generates a Markdown+Mermaid candidate report, and waits for the user to pick one candidate before any code changes
• Registers map-architecture in skill-rules.json with 7 keywords and 3 intent patterns
• Updates WORKFLOW_EFFORT_PROFILES in test_skills.py (medium/adaptive)
• Updates skill count guard in test_skills_consistency.py from 19 → 20

What the skill does

Phase 1 — Scope: accepts an optional <module-path-or-pain-point> argument; falls back to git log --since="90 days ago" hotspot analysis, filtering out lock files, migrations, and generated output trees.

Phase 2 — Report: scores each candidate area on 6 design-friction signals (change frequency, shallow interface, low locality, seam leakage, hard-to-test, ADR conflict; 0–2 each). Writes:

• .map/<branch>/architecture-report/report.md — Markdown with Mermaid before/after diagrams per candidate
• .map/<branch>/architecture-report/report.json — machine-readable companion (candidate count, scores, top recommendation) for future evals

Phase 3 — Select: presents candidates, asks user to pick ONE, then recommends /map-plan (score ≥ 6 or multi-file) or /map-fast (score < 6, bounded). Optionally records deferral notes in .map/architecture-notes.md.

Design guardrails baked into the skill

• Explicit "do not implement yet" boundary at every decision point
• No code changes inside this skill — it is purely a decision aid
• No external network required (self-contained report)
• No broad rewrites proposed; candidates must be bounded deepening opportunities
• ADR contradictions surfaced only with concrete file/line evidence

Test plan

• tests/test_skills.py — all 289 skill structural/frontmatter/trigger tests pass (including new map-architecture entry in WORKFLOW_EFFORT_PROFILES)
• tests/test_skills_consistency.py — skill count guard updated 19 → 20; all 43 tests pass
• tests/test_template_render.py — byte-identity golden render tests pass (rendered trees match source)
• make check-render — generated trees match templates_src
• Full suite: 3947 passed, 4 skipped

Closes #363 (slice 1 — skill workflow instructions + registration; Python tooling for report generation is optional future work per issue guardrails)

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 12bc1d21-7f49-4ba5-b51a-bd243ece8ddc

📥 Commits

Reviewing files that changed from the base of the PR and between 268f5a4 and 8cce423.

📒 Files selected for processing (9)

• .claude/skills/map-architecture/SKILL.md
• .claude/skills/skill-rules.json
• docs/ARCHITECTURE.md
• src/mapify_cli/templates/skills/map-architecture/SKILL.md
• src/mapify_cli/templates/skills/skill-rules.json
• src/mapify_cli/templates_src/skills/map-architecture/SKILL.md.jinja
• src/mapify_cli/templates_src/skills/skill-rules.json.jinja
• tests/test_skills.py
• tests/test_skills_consistency.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/compassionate-cerf-eynfn6

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