One search for your own team's files and the public ecosystem. See how real projects write their agent instructions, and bring the good ideas home.
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Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
royaluniondesign-sysCLAUDE.mdroyaluniondesign-sys/claude-os/CLAUDE.md
This repository IS Claude OS. When working inside this repo, you are maintaining the system itself. Always credit the original source when adapting existing work. See ATTRIBUTION.md for full credits.
royaluniondesign-sysAGENTS.mdroyaluniondesign-sys/claude-os/.claude/rules/common/agents.md
Located in ~/.claude/agents/: No user prompt needed: 1. Complex feature requests - Use planner agent 2. Code just written/modified - Use code-reviewer agent 3. Bug fix or new feature - Use tdd-guide agent 4. Architectural decision - Use architect agent ALWAYS use parallel Task execution for independent operations: For complex problems, use split role sub-agents: - Factual reviewer - Senior engineer - Security expert - Consistency reviewer - Redundancy checker
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/api-design/SKILL.md
REST API design patterns including resource naming, status codes, pagination, filtering, error responses, versioning, and rate limiting for production APIs.
Often used witheverything-claude-codeeverything-claude-code-conventionsnextjs-turbopack
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/article-writing/SKILL.md
Write articles, guides, blog posts, tutorials, newsletter issues, and other long-form content in a distinctive voice derived from supplied examples or brand guidance. Use when the user wants polished written content longer than a paragraph, especially when voice consistency, structure, and credibility matter.
Steady32 mentions in 2 weeks
52 projects use a version of this
Often used withbun-runtimeeverything-claude-code-conventionsagent-sort
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/coding-standards/SKILL.md
Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.
Often used witheverything-claude-codeeverything-claude-code-conventionsagent-sort
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/content-engine/SKILL.md
Create platform-native content systems for X, LinkedIn, TikTok, YouTube, newsletters, and repurposed multi-platform campaigns. Use when the user wants social posts, threads, scripts, content calendars, or one source asset adapted cleanly across platforms.
Steady32 mentions in 2 weeks
53 projects use a version of this
Often used withbrand-discoveryagent-sortralphinho-rfc-pipeline
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/content-hash-cache-pattern/SKILL.md
Cache expensive file processing results using SHA-256 content hashes — path-independent, auto-invalidating, with service layer separation.
Often used withralphinho-rfc-pipelinenuxt4-patternsagent-payment-x402
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/continuous-learning/SKILL.md
Automatically extract reusable patterns from Claude Code sessions and save them as learned skills for future use.
Often used withproject-guidelines-examplecontinuous-learning-v2iterative-retrieval
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/continuous-learning-v2/SKILL.md
Instinct-based learning system that observes sessions via hooks, creates atomic instincts with confidence scoring, and evolves them into skills/commands/agents.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/cost-aware-llm-pipeline/SKILL.md
Cost optimization patterns for LLM API usage — model routing by task complexity, budget tracking, retry logic, and prompt caching.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/cpp-coding-standards/SKILL.md
C++ coding standards based on the C++ Core Guidelines (isocpp.github.io). Use when writing, reviewing, or refactoring C++ code to enforce modern, safe, and idiomatic practices.
Often used withagent-payment-x402nuxt4-patternsralphinho-rfc-pipeline
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/cpp-testing/SKILL.md
Use only when writing/updating/fixing C++ tests, configuring GoogleTest/CTest, diagnosing failing or flaky tests, or adding coverage/sanitizers.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/database-migrations/SKILL.md
Database migration best practices for schema changes, data migrations, rollbacks, and zero-downtime deployments across PostgreSQL, MySQL, and common ORMs (Prisma, Drizzle, Django, TypeORM, golang-migrate).
Often used withpostgres-patternsbackend-patternse2e-testing
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/django-tdd/SKILL.md
Django testing strategies with pytest-django, TDD methodology, factory_boy, mocking, coverage, and testing Django REST Framework APIs.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/eval-harness/SKILL.md
Formal evaluation framework for Claude Code sessions implementing eval-driven development (EDD) principles
Often used withbrand-discoveryagent-sortralphinho-rfc-pipeline
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/foundation-models-on-device/SKILL.md
Apple FoundationModels framework for on-device LLM — text generation, guided generation with @Generable, tool calling, and snapshot streaming in iOS 26+.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/frontend-patterns/SKILL.md
Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.
Often used withbrand-discoveryagent-sortnuxt4-patterns
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/frontend-slides/SKILL.md
Create stunning, animation-rich HTML presentations from scratch or by converting PowerPoint files. Use when the user wants to build a presentation, convert a PPT/PPTX to web, or create slides for a talk/pitch. Helps non-designers discover their aesthetic through visual exploration rather than abstract choices.
Steady32 mentions in 2 weeks
90 projects use a version of this
Often used witheverything-claude-codeeverything-claude-code-conventionsnextjs-turbopack
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/golang-patterns/SKILL.md
Idiomatic Go patterns, best practices, and conventions for building robust, efficient, and maintainable Go applications.
Often used withnuxt4-patternsdart-flutter-patternsralphinho-rfc-pipeline
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/golang-testing/SKILL.md
Go testing patterns including table-driven tests, subtests, benchmarks, fuzzing, and test coverage. Follows TDD methodology with idiomatic Go practices.
Often used withgolang-samber-logolang-error-handlinggolang-swagger
Plain text files in a repository that tell a coding agent how the project works: commands to run, conventions to follow and things to avoid. CLAUDE.md, AGENTS.md, cursor rules and skills are the common kinds.
CLAUDE.md is read by Claude Code. AGENTS.md is an open format that Codex, Cursor and other agents read. Many projects keep one and point the other at it.
A folder with a SKILL.md that describes one capability, such as filling PDFs or reviewing code. The agent loads it only when the task calls for it.
Your agents already can, over MCP, limited to the files you're allowed to read. Searching them from this page is coming.
