Comprehensive sets of standards and practices designed to elevate the capabilities of AI coding agents.
Skill Claude CodeCodex
Hono lightweight web framework patterns: type-safe route handlers, middleware composition, Zod validation, and RPC clients for Cloudflare Workers, Node, or Bun. Use when building Hono APIs. Pair with typescript-idioms.
Skill Claude CodeCodex
Structured incident workflow: severity classification, triage, diagnosis, mitigation, postmortem, and prevention. Template-driven with blameless review.
Skill Claude CodeCodex
Modern Java (17/21+ LTS) idioms: records, sealed classes, pattern matching switch, Optional hygiene, streams, and JUnit 5 testing. Use when writing, refactoring, or reviewing Java core logic, domain models, or libraries. Pair with spring-boot-idioms for Spring services.
Skill Claude CodeCodex
Modern JavaScript (ES2024+) idioms: ESM, CJS interoperability, async/await, and runtime safety in projects without TypeScript. Use only when working in pure JavaScript environments; for TypeScript load typescript-idioms.
Skill Claude CodeCodex
Kotlin coding idioms: compile-time null safety, data classes, sealed hierarchies, coroutines and Flow concurrency, and Kotest/MockK testing. Use when developing, refactoring, or reviewing Kotlin backend, Android, or multiplatform code.
Skill Claude CodeCodex
Laravel framework patterns: Eloquent ORM relationships, N+1 query prevention, Form Request validation, Service layer architecture, and Pest/PHPUnit testing. Use when building or reviewing Laravel web apps and APIs. Pair with php-idioms.
Skill Claude CodeCodex
Structured logging implementation patterns: log levels, mandatory context fields (correlationId, userId, duration), security (PII scrubbing), and per-language library choices (Go slog, TypeScript pino, Python structlog). Load when implementing logging in any operation entry point. Prerequisite…
Skill Claude CodeCodex
ML pipeline design, feature engineering, model training/serving, experiment tracking, model validation, and MLOps principles.
Skill Claude CodeCodex
Generates distinctive, production-grade mobile interfaces for Flutter and React Native. Prioritizes platform-native patterns, adaptive layouts, and fluid motion. Use when building mobile apps, screens, widgets, or when the user requests to style or create visually striking mobile UI.
Skill Claude CodeCodex
Mobile E2E testing patterns — Flutter integrationtest, Patrol, Maestro, golden testing, device matrix, and test data management. Use when writing E2E tests for mobile applications.
Skill Claude CodeCodex
Next.js App Router architecture: React Server Components (RSC), Server Actions, nested layouts, route handlers, and streaming. Use when building or refactoring Next.js web applications. Pair with react-idioms and typescript-idioms.
Skill Claude CodeCodex
MECE task decomposition, file ownership enforcement, DAG-based execution, and safe merge protocol for intra-domain parallel dispatch. The safety invariants that prevent merge chaos when multiple agents write in parallel. Applies recursively at every nesting depth.
Skill Claude CodeCodex
PCI DSS compliance, payment gateway integration, tokenization, webhook reliability, idempotency, fraud prevention, and subscription billing.
Skill Claude CodeCodex
Profile-driven performance optimization protocol. Use when profiling data (CPU, heap, trace) is available or when the user requests performance analysis. Covers methodology (Profile → Analyze → Opportunity Scan → Prioritize → Optimize → Benchmark), optimization pattern catalog, safety invariants, and when-to-stop…
Skill Claude CodeCodex
Modern PHP 8.x idioms: strict types, typed properties, enums, readonly classes, match expressions, and PSR standards. Use when writing, refactoring, or reviewing pure PHP code, domain services, or libraries. Pair with laravel-idioms for Laravel applications.
Skill Claude CodeCodex
PostgreSQL best practices — schema design, query performance, indexing, connection management, RLS, concurrency, monitoring, and migrations. Load when writing SQL, designing schemas, or optimizing PostgreSQL queries.
Skill Claude CodeCodex
Modern Python (3.11+) idioms: type annotations, typing Protocols, Pydantic models, asyncio, pytest fixtures, and Ruff/Mypy strict compliance. Use when writing, refactoring, or reviewing Python applications, APIs, or scripts.
Skill Claude CodeCodex
Ruby on Rails framework patterns: ActiveRecord scopes, N+1 query prevention, model validations, RESTful routing, and RSpec/Minitest testing. Use when building, maintaining, or auditing Rails web applications and APIs. Pair with ruby-idioms.
Skill Claude CodeCodex
React 19+ patterns: custom hooks, Suspense boundaries, state management, component composition, and web performance. Use when developing or refactoring React components and client applications. Pair with typescript-idioms.
Skill Claude CodeCodex
Safe refactoring pattern catalog: code smell taxonomy, transformation techniques, behavior preservation strategies, and metrics tracking.
Skill Claude CodeCodex
Structured research protocol: investigate technologies, patterns, APIs before implementation. Multi-tool search, research logs, training data fallback honesty.
Skill Claude CodeCodex
Modern Ruby (3.x) idioms: pattern matching, keyword arguments, immutable data structures, error hierarchies, and RSpec testing. Use when writing, modifying, or reviewing Ruby scripts, gems, or business logic. Pair with rails-idioms for Rails applications.
Skill Claude CodeCodex
Rust idioms: ownership and borrow checker patterns, error handling with thiserror/anyhow, Tokio async concurrency, lifetime management, and Clippy pedantic compliance. Use when writing, optimizing, or reviewing Rust crates.
Skill Claude Code
Runs a security-focused audit and multi-dimensional vulnerability assessment with parallel subagents. User-invoked entry point via /security-audit; not for autonomous or subagent use.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: