Installable, permission-bounded, multi-platform agent skills & subagents for Claude Code, Codex, Copilot & Gemini/Antigravity — 125 skills + 73 subagents across 18 departments, with a validation harness, native plugin marketplace, and full upstream attribution. by FluxonLab.
This repository also configures its own agents. See what Skillry tells them →
Skill Claude CodeCodex
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
Skill Claude CodeCodex
Writes and reviews API automation tests with Playwright. Use when creating backend API tests, contract checks, data-driven assertions, or API+UI hybrid workflows in Playwright Test. Focus on robust, maintainable test design with clear setup/teardown, single responsibility per test, and best practices for assertions…
Skill Claude Code
Designs risk-based functional test plans, manual test cases, regression slices, and automation handoff packs from requirements, URLs, or exploratory notes. Use when preparing manual QA coverage before automation, turning feature descriptions into scenario catalogs, or converting exploratory findings into structured…
Skill Claude Code
Designs realistic, boundary-heavy, and role-aware test data packs for manual and automated testing. Use when a feature needs deliberate inputs and fixtures before execution, when edge-case values keep being improvised, or when automation needs stable example data with setup notes.
Skill Claude CodeCodex
Map requirements (PRD/user stories/AC) to comprehensive test coverage using a traceability matrix (RTM). Outputs coverage gaps, risks, test levels, prioritization, automation candidates, and change-impact notes. Designed for QA/Test Architect workflows.
Skill Claude CodeCodex
Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.
Skill Claude CodeCodex
Master Python asyncio, concurrent programming, and async/await patterns for high-performance applications. Use when building async APIs, concurrent systems, or I/O-bound applications requiring non-blocking operations.
Skill Claude CodeCodex
Master Bash Automated Testing System (Bats) for comprehensive shell script testing. Use when writing tests for shell scripts, CI/CD pipelines, or requiring test-driven development of shell utilities.
Skill Claude CodeCodex
Optimize Bazel builds for large-scale monorepos. Use when configuring Bazel, implementing remote execution, or optimizing build performance for enterprise codebases.
Skill Claude CodeCodex
Execute database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures. Use when migrating databases, changing schemas, performing data transformations, or implementing zero-downtime deployment strategies.
Skill Claude CodeCodex
Master systematic debugging techniques, profiling tools, and root cause analysis to efficiently track down bugs across any codebase or technology stack. Use when investigating bugs, performance issues, or unexpected behavior.
Skill Claude CodeCodex
Master end-to-end testing with Playwright and Cypress to build reliable test suites that catch bugs, improve confidence, and enable fast deployment. Use when implementing E2E tests, debugging flaky tests, or establishing testing standards.
Skill Claude CodeCodex
Select and optimize embedding models for semantic search and RAG applications. Use when choosing embedding models, implementing chunking strategies, or optimizing embedding quality for specific domains.
Skill Claude CodeCodex
Master error handling patterns across languages including exceptions, Result types, error propagation, and graceful degradation to build resilient applications. Use when implementing error handling, designing APIs, or improving application reliability.
Skill Claude CodeCodex
Create production-ready FastAPI projects with async patterns, dependency injection, and comprehensive error handling. Use when building new FastAPI applications or setting up backend API projects.
Skill Claude CodeCodex
Advanced Git: rebase, cherry-pick, bisect, worktrees, reflog recovery.
Skill Claude CodeCodex
Combine vector and keyword search for improved retrieval. Use when implementing RAG systems, building search engines, or when neither approach alone provides sufficient recall.
Skill Claude CodeCodex
Implement comprehensive testing strategies using Jest, Vitest, and Testing Library for unit tests, integration tests, and end-to-end testing with mocking, fixtures, and test-driven development. Use when writing JavaScript/TypeScript tests, setting up test infrastructure, or implementing TDD/BDD workflows.
Skill Claude CodeCodex
Design LLM applications using LangChain 1.x and LangGraph for agents, memory, and tool integration. Use when building LangChain applications, implementing AI agents, or creating complex LLM workflows.
Skill Claude CodeCodex
Implement comprehensive evaluation strategies for LLM applications using automated metrics, human feedback, and benchmarking. Use when testing LLM performance, measuring AI application quality, or establishing evaluation frameworks.
Skill Claude CodeCodex
Master ES6+ features including async/await, destructuring, spread operators, arrow functions, promises, modules, iterators, generators, and functional programming patterns for writing clean, efficient JavaScript code. Use when refactoring legacy code, implementing modern patterns, or optimizing JavaScript applications.
Skill Claude CodeCodex
Master monorepo management with Turborepo, Nx, and pnpm workspaces to build efficient, scalable multi-package repositories with optimized builds and dependency management. Use when setting up monorepos, optimizing builds, or managing shared dependencies.
Skill Claude CodeCodex
Master Next.js 14+ App Router with Server Components, streaming, parallel routes, and advanced data fetching. Use when building Next.js applications, implementing SSR/SSG, or optimizing React Server Components.
Skill Claude CodeCodex
Configure and optimize Nx monorepo workspaces. Use when setting up Nx, configuring project boundaries, optimizing build caching, or implementing affected commands.
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: