メニュー
Use when existing code is correct but structurally costly to change, and the team needs to improve clarity, coupling, duplication, or seam quality without changing externally observable behavior.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Use when a bug, failing test, regression, or unexpected behavior needs a root-cause-first debugging loop before code changes, especially when brownfield seams, recent releases, or historical defect matches make guesswork unsafe.
Use when E2E tests must go beyond shallow happy-path checks — multi-step user journeys, stateful sessions, cross-boundary state consistency, failure-mode edges — or when the suite passes but production still breaks. Platform- and framework-agnostic (web, mobile, desktop; Playwright, XCUITest, Cypress).
Use when discovery has narrowed an idea enough that the team must make a go/no-go, pivot, or scope-down decision based on technical, economic, operational, or timeline viability before requirements, architecture, or major implementation.
The mandatory gateway for all new engineering work. Triage and route new products, apps, features, migrations, tech-debt, or any 'not sure where to start' request to the correct lifecycle path. Use before starting design or implementation. Do not use for ongoing tasks, specific debugging, or PR reviews.
Use when discovery needs evidence about market demand, competitors, pricing pressure, or underserved segments for a new product or expansion idea before feasibility, user research, or requirements are finalized.
Use when intake has identified the likely lifecycle path but the problem statement, solution direction, or key trade-offs are still too fuzzy for requirements, research, or architecture work to start cleanly
| name | pc-refactoring |
| description | Use when existing code is correct but structurally costly to change, and the team needs to improve clarity, coupling, duplication, or seam quality without changing externally observable behavior. |
| metadata | {"phase":"04-implementation","inputs":["source-code","test-suite","review-report","tech-debt-registry"],"outputs":["source-code"],"prerequisites":["pc-feature-development"],"quality_gate":"Behavior remains stable under tests, structural complexity is reduced, and the refactor stays narrow enough for confident review","roles":["developer","tech-lead"],"methodologies":["all"],"effort":"medium"} |
Improve the design of working code without changing what the system does.
Refactoring keeps implementation quality from decaying between releases.
See context and anti-pattern notes.
I/O contract notes define required inputs and authority.
Pick a focused target such as duplication, oversized functions, unstable seams, hidden dependencies, or naming that obscures intent. Define the invariant that must not change.
Avoid combining unrelated cleanup goals into one refactor.
Before moving code, verify the tests protect the behavior that matters. Add characterization or regression coverage first if the current suite would allow a silent behavior change.
Make the change as a sequence of small transformations:
Run the relevant tests after every step.
Before review, state what got better: smaller surface area, clearer boundaries, lower duplication, simpler control flow, or safer extension points. If you cannot name the gain, the change is probably unnecessary.
Produce only declared outputs at their documented quality boundary.
