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architectural-review

How to review PRs for architectural quality — module boundaries, dependency direction, export surface, pattern consistency

.copilot/skills/architectural-review/SKILL.md

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## Context

When reviewing a PR that touches core architecture, the reviewer must verify that structural invariants are preserved. This skill covers **reviewing existing PRs** for architectural quality — not writing proposals (see `architectural-proposals/SKILL.md` for that).

Use this skill when a PR includes any of:
- New modules, packages, or directories
- Dependency changes (`package.json`, `import` additions across package boundaries)
- API surface changes (new or modified exports from `index.ts` barrel files)
- Cross-package imports (anything crossing the SDK/CLI boundary)
- New abstractions (interfaces, base classes, registries, factories)
- Sweeping refactors (file renames, pattern migrations, bulk conversions)

## Patterns