Evidence-first code review and refactoring skills for Claude Code and Codex. Find root causes, reject unnecessary refactors, and make the smallest safe change.
Skill Claude CodeCodex
Review and improve software architecture using evidence from module boundaries, dependency direction, coupling, cohesion, change paths, and public contracts. Use when auditing system structure, cyclic dependencies, god components, misplaced responsibilities, SOLID concerns, domain/application/infrastructure…
Skill Claude CodeCodex
Coordinate an evidence-based review and safe improvement of an existing codebase across architecture, simplicity, duplication, maintainability, dependencies, testing, and performance. Use only when explicitly invoked for a holistic codebase audit, prioritized refactoring plan, or implementation of selected findings.…
Skill Claude CodeCodex
Audit software dependencies for necessity, health, compatibility, deprecation, duplication, security advisories, lockfile integrity, and migration risk. Use when reviewing package manifests, outdated or abandoned libraries, deprecated APIs, overlapping packages, trivial dependencies, version conflicts, runtime…
Skill Claude CodeCodex
Review repeated code and knowledge without applying DRY mechanically. Use when investigating copy-paste logic, duplicated business rules, validators, transformations, schemas, synchronized changes, drift between implementations, or abstractions created only because code looks similar. Distinguish costly shared…
Skill Claude CodeCodex
Review and improve local code clarity, predictability, and changeability. Use when code has tangled control flow, deep nesting, long or multi-purpose functions, hidden side effects, unclear names, mixed abstraction levels, magic values, excessive mutable state, broad exception handling, or responsibilities that make a…
Skill Claude CodeCodex
Investigate and improve software performance using profiling, benchmarks, traces, production metrics, query plans, bundle analysis, or clearly established complexity issues. Use for latency, throughput, memory, CPU, bundle size, N+1 queries, repeated network calls, blocking I/O, unbounded collections, redundant…
Skill Claude CodeCodex
Find and remove unnecessary software complexity while challenging refactoring proposals for KISS and YAGNI violations. Use when code has excessive layers, speculative abstractions, single-use factories or interfaces, over-generalized types, configuration indirection, pattern-heavy designs, or solutions that are more…
Skill Claude CodeCodex
Review and improve how tests protect critical software behavior. Use when assessing missing unit, integration, contract, or end-to-end coverage; flaky tests; weak assertions; happy-path-only tests; excessive mocking; implementation-coupled tests; low-value snapshots; slow suites; or code that is difficult to test…