Skills real projects publish on GitHub, most starred first. Each one says what it will make an agent do before you copy it.
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
royaluniondesign-sysReads credentialsSkillroyaluniondesign-sys/claude-os/.claude/skills/e2e-testing/SKILL.md
Playwright E2E testing patterns, Page Object Model, configuration, CI/CD integration, artifact management, and flaky test strategies.
Often used witheverything-claude-codeeverything-claude-code-conventionsbun-runtime
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
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/investor-materials/SKILL.md
Create and update pitch decks, one-pagers, investor memos, accelerator applications, financial models, and fundraising materials. Use when the user needs investor-facing documents, projections, use-of-funds tables, milestone plans, or materials that must stay internally consistent across multiple fundraising assets.
Steady32 mentions in 2 weeks
38 projects use a version of this
Often used withbrand-discoveryralphinho-rfc-pipelineagent-sort
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/investor-outreach/SKILL.md
Draft cold emails, warm intro blurbs, follow-ups, update emails, and investor communications for fundraising. Use when the user wants outreach to angels, VCs, strategic investors, or accelerators and needs concise, personalized, investor-facing messaging.
Steady32 mentions in 2 weeks
37 projects use a version of this
Often used witheverything-claude-code-conventionsagent-sortbun-runtime
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/iterative-retrieval/SKILL.md
Pattern for progressively refining context retrieval to solve the subagent context problem
Often used withralphinho-rfc-pipelineproject-guidelines-exampledjango-verification
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/java-coding-standards/SKILL.md
Java coding standards for Spring Boot services: naming, immutability, Optional usage, streams, exceptions, generics, and project layout.
Often used withspringboot-tddspringboot-securitypostgres-patterns
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/jpa-patterns/SKILL.md
JPA/Hibernate patterns for entity design, relationships, query optimization, transactions, auditing, indexing, pagination, and pooling in Spring Boot.
Often used withnuxt4-patternsagent-payment-x402ralphinho-rfc-pipeline
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/liquid-glass-design/SKILL.md
iOS 26 Liquid Glass design system — dynamic glass material with blur, reflection, and interactive morphing for SwiftUI, UIKit, and WidgetKit.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/market-research/SKILL.md
Conduct market research, competitive analysis, investor due diligence, and industry intelligence with source attribution and decision-oriented summaries. Use when the user wants market sizing, competitor comparisons, fund research, technology scans, or research that informs business decisions.
Steady32 mentions in 2 weeks
101 projects use a version of this
Often used witheverything-claude-codeeverything-claude-code-conventionsnextjs-turbopack
royaluniondesign-sysReads credentialsSkillroyaluniondesign-sys/claude-os/.claude/skills/nutrient-document-processing/SKILL.md
Process, convert, OCR, extract, redact, sign, and fill documents using the Nutrient DWS API. Works with PDFs, DOCX, XLSX, PPTX, HTML, and images.
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/postgres-patterns/SKILL.md
PostgreSQL database patterns for query optimization, schema design, indexing, and security. Based on Supabase best practices.
Often used withralphinho-rfc-pipelinenuxt4-patternsvite-patterns
royaluniondesign-sysReads credentialsSkillroyaluniondesign-sys/claude-os/.claude/skills/project-guidelines-example/SKILL.md
Example project-specific skill template based on a real production application.
Often used withralphinho-rfc-pipelinedjango-verificationspringboot-tdd
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/python-patterns/SKILL.md
Pythonic idioms, PEP 8 standards, type hints, and best practices for building robust, efficient, and maintainable Python applications.
Often used withnuxt4-patternsdart-flutter-patternsagent-payment-x402
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/python-testing/SKILL.md
Python testing strategies using pytest, TDD methodology, fixtures, mocking, parametrization, and coverage requirements.
Often used withdjango-verificationpython-patternsproject-guidelines-example
royaluniondesign-sysSkillroyaluniondesign-sys/claude-os/.claude/skills/regex-vs-llm-structured-text/SKILL.md
Decision framework for choosing between regex and LLM when parsing structured text — start with regex, add LLM only for low-confidence edge cases.
Often used withralphinho-rfc-pipelinenuxt4-patternspytorch-patterns
A folder with a SKILL.md file: a name, a description of when to use it, and instructions. Claude loads a skill only when the task matches its description.
Copy the folder into your project's .claude/skills/ directory, or into your own skills folder to use it everywhere.
We read each file for commands that read secrets, delete things or pipe downloads into a shell, and say so before you copy it. No warning is not a promise that a file is safe.
Open a skill to see its discussion. Reports from people and their agents are coming.
