Best code quality skills for Claude Code, Codex and other agents.

Scans React code for lint, accessibility, bundle size and architecture issues, reports a health score and checks that changes do not lower it.

makeplane/plane

Reviews WooCommerce code changes against the project's standards, flagging backend PHP architecture, naming, documentation, data integrity and testing violations.

woocommerce/woocommerce

Guides refactoring in phases based on Martin Fowler's method: research, test coverage check, planning and small tested steps, with your approval at each phase.

luongnv89/claude-howto

Installs, updates or migrates the vendored anti-slop Oxlint plugin in a repository, keeping local rule changes and the plugin's license and provenance files.

dmmulroy/anti-slop

Records a project's quality bar in CONSTRAINTS.md and watches diffs for signs an agent quietly weakened it, such as suppressions, skipped tests or lowered thresholds.

addyosmani/agent-skills

Reviews Dolibarr PHP code for compliance with coding standards and security best practices, and fixes identified issues.

Dolibarr/dolibarr

Enforces one repository's React and TypeScript module layout for code under src/: source-root imports, feature barrels, deliberate exports and no deep imports.

siteboon/claudecodeui

Applies opinionated production Python conventions chosen by the project's Python version: modern type syntax, pathlib, explicit checks and interface guidance.

docling-project/docling

Validates arguments of exported R functions with the standalone check_* type checkers from rlang, in tidyverse style with clear error messages.

tidyverse/dplyr

Reviews generated or changed production code against Clean Code, SOLID, DRY, KISS, YAGNI and LLM-specific failure modes before it ships, in any language.

amElnagdy/guard-skills

Keeps an agent focused on the requested work by applying a five-step ladder that checks for direct solutions, real gaps and speculative defenses before adding anything.

lennney/stop-that-shit

Guides systematic, test-backed refactoring in the style of Martin Fowler, moving through research, planning and small incremental changes with your approval at each phase.

luongnv89/claude-howto

A playbook for fixing ESLint and TypeScript errors in the OpenObserve web frontend, with rule-by-rule guidance and typing conventions.

openobserve/openobserve

Review Archify issues, PRs, or code through value, cost, and impact to support evidence-based maintenance decisions. Use for issue triage, change…

tt-a1i/archify

Builds a weekly engineering retrospective from git history: commit counts, per-person contributions, work patterns and code quality numbers over a chosen window.

garrytan/gstack

Provides comprehensive code review guidance for React 19, Vue 3, Angular 17+, Svelte 5, Rust, TypeScript, Java, Java 8, PHP, Ruby, Rails, Python, Django, FastAPI, Go, C/.NET, Kotlin, Swift, Dart…

awesome-skills/code-review-skill

Checklist for wiring a new linter into Opik's Code Quality pipeline: the four files to edit, the silent-failure gotchas and the pass/fail verification loop.

comet-ml/opik

Read-only review of Qt6 C++ code that combines a deterministic lint script with six parallel analysis agents and reports only high-confidence issues.

x-tools-author/x-tools

Scheduled CI skill that scans a repository for small, certain docs, test and code hygiene issues and fixes them on one branch with a commit per finding.

QwenLM/qwen-code

Grades agent skills by scoring agent conversations for efficiency, code quality, procedure compliance, and verbosity, then drafts concrete skill edits and a shareable report.

warpdotdev/common-skills

A code-change gate for the iPolloWork repository: search and reuse first, keep one source of truth, justify every new file or dependency, and audit the change.

Devin-AXIS/iPolloWork

This skill should be used when analyzing technical debt in a codebase, documenting code quality issues, creating technical debt registers, or assessing code maintainability.

ailabs-393/ai-labs-claude-skills

Maintains LobeHub's model-backed alint rule set: writing rules, removing false positives against real code, deciding warn versus error and tracking token cost.

lobehub/lobehub

Applies principles from Robert C. An agent skill from GabrielMartinMoran/mind.

GabrielMartinMoran/mind

Comprehensive code review skill for TypeScript, JavaScript, Python, Swift, Kotlin, Go.

jewbetcha/opentrace

Compares two folders function by function with jscpd --compare, across languages if needed, and explains which functions match and which have no counterpart.

kucherenko/jscpd

Audit, design, and implement AI agent harnesses for any codebase.

OdradekAI/harness-engineering-guide

Plans a refactor from a code dependency graph, previews renames before applying them and checks that the final impact matches the plan.

tirth8205/code-review-graph

Gives an agent a set of working rules for any development task: understand first, surface decisions, verify results, and load deeper reference files per scenario.

shareAI-lab/Kode-CLI

Baseline cross-project coding conventions for naming, readability, immutability, and code-quality review.

KartikLabhshetwar/mind-mentor

Finds every FIXME comment in a codebase, groups related ones across files into one task, implements the work they describe and removes the comments once it is done.

tailcallhq/forgecode

Maintain code health and architecture standards when implementing features or refactoring Doorkeeper.

doorkeeper-gem/doorkeeper

Cross-language architecture and clean-code principles for this project: Clean Code, Object Calisthenics, SOLID, guard clauses, hot-path cost, and the code review checklist.

JanDeDobbeleer/oh-my-posh

Delegates coding tasks to Codex CLI for prototyping, debugging, and code review.

GuDaStudio/collaborating-with-codex

Reviews macOS Swift 6+ code for modern idioms, SOLID principles, SwiftData patterns, and concurrency best practices.

KartikLabhshetwar/better-shot

A skill your agent uses when writing code, implementing features, refactoring, planning architecture, designing systems, reviewing code, or debugging.

ramziddin/solid-skills

Audits a project's agent configuration, instruction drift, hooks, MCP and AI maintainability, then reports prioritized findings with evidence and next actions.

tw93/Waza

Codebase health scanner and technical debt tracker. An agent skill from Git-on-my-level/codex-autorunner.

Git-on-my-level/codex-autorunner

Scans code for complexity, long functions, duplicated blocks, naming problems and code smells with a Node script, then reports and suggests refactors.

fengshao1227/ccg-workflow

Reviews code for security, performance, quality and maintainability, using a checklist, a finding template and two metrics scripts.

luongnv89/claude-howto

Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.

kurealnum/dotfiles

Iterative code refinement through plan → code → evaluate → refine cycles.

EvoScientist/EvoSkills

Code-quality standards for RedisInsight: TypeScript strictness, naming conventions (camelCase, PascalCase, UPPERSNAKECASE), linting rules, no any without reason, no !important in styles, and…

redis/RedisInsight

Core entry-point router, orchestrator, and reference manual for all Atomico.js tasks.

atomicojs/atomico

Sets the sonar-java conventions for adding an analyzer rule: metadata from rule-api, test locations, MethodMatchers and what not to commit or change.

SonarSource/sonar-java

Audible code-quality reactions for code reading, review, refactoring, debugging, and repository exploration.

AndrewVos/endless-toil

Runs an autonomous improvement loop on a repository: agents propose and execute plans, a tournament picks the winner by benchmark, and each round is recorded and plotted.

Yeachan-Heo/oh-my-claudecode

Rules for writing and converting formatted output in ripwire's C++ source with its emit helpers, keeping every printed byte identical to the old printf output.

redhat-et/ripwire