45ck class-responsibility-checker
Purpose
Check whether each class has a clear, coherent reason to change and a sensible responsibility boundary.
Trigger this skill when
- A class appears to do too many unrelated jobs.
- A service, entity, or controller has many reasons to change.
- You need to decide whether to split, merge, or redraw boundaries.
Expected inputs
- class/interface definitions
- method list
- field list
- usage context
- domain intent
Deliverables
- responsibility assessment
- boundary problems
- split/merge suggestions
- reason-to-change analysis
- next refactor targets
Operating procedure
- Identify the object-oriented concern this skill is meant to assess.
- Separate facts from inferred design intent.
- Review the current structure against OOP fundamentals: responsibility, invariants, ownership, exposure, abstraction, and lifecycle where relevant.
- Surface concrete risks, tradeoffs, and improvement options.
- Prefer minimal structural change that materially improves clarity or safety.
- Hand off to the next most relevant skill if the issue is broader than this skill alone can resolve.
Quality gates
- Findings are tied to concrete code structure or stated design intent.
- Recommendations explain why, not just what.
- Tradeoffs are stated when multiple designs could work.
- Output avoids style nitpicks unless they affect abstraction or maintainability.
Handoff targets
- encapsulation-reviewer
- method-cohesion-checker
- inheritance-vs-composition-advisor
Output style
- Be explicit about uncertainty.
- Prefer short, evidence-based findings over long vague critique.
- Distinguish design defects from mere preference.
- End with recommended next actions.
Failure modes to avoid
- Do not invent framework constraints without evidence.
- Do not recommend sweeping refactors without naming the benefit.
- Do not confuse naming/style issues with true design problems unless they affect abstraction.
- Do not force inheritance, immutability, or statics as ideology.
Minimum output skeleton
## Summary
## Findings
## Risks
## Recommendations
## Tradeoffs
## Recommended next skill