claude-skills

Create production-ready GitHub Actions workflows for automated testing, building, and deploying applications. Use when setting up CI/CD with GitHub Actions, automating development workflows, or creating reusable workflow templates.

Implement comprehensive evaluation strategies for LLM applications using automated metrics, LLM-as-judge, human feedback, and benchmarking. Use when testing LLM performance, measuring AI application quality, comparing prompts/models, or establishing evaluation frameworks. Covers RAGAS for RAG pipelines, evals-as-code CI/CD integration, and modern 2025/2026 practices including structured output evaluation and agentic task success measurement.

Create or expand an Idea.md / IDEA.md file from a rough description, existing repo, conversation history, notes, or other early-stage product inputs. Use when the user asks to "write an Idea.md", "turn this into an idea file", "capture this product idea", "expand this concept", or wants a repo-grounded concept brief before validation, PRD, or implementation work.

Run a rigorous autonomous experiment loop for any optimization target using explicit hypotheses, repeated trials, structured experiment logs, and local HTML reports. Use when asked to "run autoresearch", "optimize X in a loop", "start experiments", or "improve this with benchmark-driven iteration".

Capture reusable knowledge and create new skills automatically during coding sessions, problem solving, and retrospectives. Use when finishing a complex task, running a retrospective, discovering a reusable pattern, or when user says "save this as a skill", "capture this solution", "run a retrospective", or "what did we learn from this".

Build professional native macOS apps in Swift with SwiftUI and AppKit. Full lifecycle - build, debug, test, optimize, ship. CLI-only, no Xcode. Use when asked to: create macOS apps, build Swift apps, develop SwiftUI interfaces, fix macOS app issues, add macOS app features, or when user says 'build a Mac app', 'create a Swift project', 'develop for macOS'.

Use when the user asks to generate or edit images via the OpenAI Image API (for example: generate image, edit/inpaint/mask, background removal or replacement, transparent background, product shots, concept art, covers, or batch variants); run the bundled CLI (`scripts/image_gen.py`) and require `OPENAI_API_KEY` for live calls.

Perform language and framework specific security best-practice reviews and suggest improvements. Trigger when the user requests: security review, security report, threat assessment, vulnerability scan, security audit, secure-by-default coding, hardening guidance, or security best practices guidance. Supported languages: Python, JavaScript/TypeScript, Go. Covers OWASP Top 10, supply chain security, secrets management, dependency auditing, and modern cloud deployment hardening.

Repository-grounded threat modeling that enumerates trust boundaries, assets, attacker capabilities, abuse paths, and mitigations, then writes a concise actionable Markdown threat model. Trigger only when the user explicitly asks to threat model a codebase or path, enumerate threats/abuse paths, or perform AppSec threat modeling. Covers STRIDE, PASTA, and attacker-goal-based methodologies, with modern considerations for AI/ML systems, cloud-native deployments, and supply chain threats.

Generate animated ASCII art from images with subject detection, blurred pixelated backgrounds, and dynamic visual effects. Use when asked to create ASCII art, convert an image to ASCII, generate pixel art, add animated text art effects, or make retro-style visual art from photos.

Wrap the howdymary/autopredict Polymarket trading-agent repo. Use when you need to scan live Polymarket markets, inspect structural event mispricing, evaluate a market with your own fair probability, run reproducible backtests against a JSON dataset, tune strategy parameters safely, or review the repo's paper/live trading scaffolds and failure modes.

Comprehensive Cloudflare account management for deploying Workers, KV Storage, R2, Pages, DNS, and Routes. Use when deploying cloudflare services, managing worker containers, configuring KV/R2 storage, or setting up DNS/routing. Requires CLOUDFLARE_API_KEY in .env and Bun runtime with dependencies installed.

Research content trends and generate data-driven article outlines by analyzing Google Trends, Reddit, LinkedIn, X, Substack, Medium, YouTube, and more. Use when asked to research content ideas, find trending topics, generate article outlines, analyze audience intent, or when user says "what should I write about", "find trending topics in X", or "research content ideas".

Execute a written implementation plan with review checkpoints and structured progress tracking. Use when you have a spec or plan ready to implement, when user says "execute this plan", "implement this spec", "carry out these steps", or "start working on the plan".

Run a self-referential self-improving agent loop where a meta-agent iteratively modifies a task-agent's code to optimize for any measurable target. Based on Facebook Research's Hyperagents paper (arXiv:2603.19461). Use when asked to "run hyperagent", "self-improve this", "optimize with self-modification", or "evolve this agent/script".

Fetch and extract web content as clean Markdown when provided with URLs. Use this skill whenever a user provides a URL (http/https link) that needs to be read, analyzed, summarized, or extracted. Converts web pages to Markdown with 80% fewer tokens than raw HTML. Handles all content types including JS-heavy sites, documentation, articles, and blog posts. Supports three conversion methods (auto, AI, browser rendering). Always use this instead of web_fetch when working with URLs - it's more efficient and provides cleaner output.

Generate world-class, production-ready prompts in one shot through intelligent 5-7 question flow and 69 presets across 15 professional domains. Supports XML/Claude/ChatGPT/Gemini formats with quality validation. Returns a single mega-prompt ready to use—skill does NOT implement the work described in the prompt. Optimized for modern LLMs including Claude 3.5+, GPT-4.1, and Gemini 2.5.

Analyze and optimize websites for search engine visibility. Use when asked to run an SEO audit, improve page rankings, fix meta tags, add schema markup, generate a sitemap, optimize for Core Web Vitals, or when user says "improve my SEO", "audit this site's SEO", or "help me rank higher on Google".

Write, debug, and optimize Shadertoy shaders and GLSL fragment shaders for procedural graphics. Use when creating visual effects, generative art, or WebGL shaders; when writing .glsl files; or when user says "write a shader", "make a Shadertoy effect", "help with GLSL", or "create a procedural animation".

Get real-time NYC transit information — subway, bus, ferry, and commuter rail — via the subway-info CLI or REST API at subwayinfo.nyc. Use when asked about NYC subway status, train times, bus routes, ferry schedules, transit delays, MTA service alerts, or "what's the next train to X".

Systematic step-by-step debugging process for bugs, test failures, and unexpected behavior. Use when a test fails, something isn't working as expected, user says "this is broken", "why isn't X working", "help me debug", or when you encounter any error before proposing a fix.

Write structured implementation plans from specs or requirements before touching code. Use when given a spec, requirements doc, or feature description, when user says "plan this out", "write a plan for", "how should we implement", or before starting any multi-step coding task.

Post tweets, read threads, search X/Twitter from the terminal using the bird CLI. Use when automating Twitter/X, posting from scripts, analyzing tweet threads, monitoring mentions, or working with the Twitter API without OAuth setup.

Playdate game development in Lua with the Playdate SDK. Covers game loop, sprites, graphics, input (crank, buttons, accelerometer), audio, UI, performance, metadata (pdxinfo), and simulator/device workflow. Use when asked to make a Playdate game, implement Playdate-specific mechanics, or apply Playdate design and accessibility guidelines.

Generate images using Google's Gemini API. Use when creating images from text prompts, editing existing images, or combining reference images for AI-generated visual content.

Visual and front-end development assistant powered by Google Gemini's multimodal models. Use for UI analysis, design comparison, accessibility audits, color palette extraction, screenshot-to-code conversion, generating UI assets, and text-based design assistance from briefs.

Generate and edit high-quality AI images using Google's Gemini image models (Nano Banana series) via MCP. Use when user wants to create images, edit photos, generate graphics, or needs visual content with text rendering. Supports gemini-3.1-flash-image-preview (Nano Banana 2) and gemini-2.5-flash-image-preview (Nano Banana).

Security audit smart contracts for exploitable vulnerabilities from an unprivileged context. Use when analyzing Solidity contracts, reviewing bytecode, testing exploits on forks, or searching for ways to extract funds without owner access. Covers verified and unverified contracts, bytecode disassembly, vulnerability ranking, proof-of-concept exploit generation, DeFi protocol attacks, and cross-chain bridge security.

Consult other LLMs (GPT-4.1, o4-mini, Gemini 2.5 Pro, Claude Opus) for second opinions on complex bugs, hard problems, planning, and architecture decisions. Use proactively when stuck for 15+ minutes or facing complex debugging. Use when user says 'ask Gemini/GPT/Claude about X' or 'get a second opinion'.

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP/MCP SDK) or Node/TypeScript (MCP SDK). Covers tool design, output schemas, Streamable HTTP transport, authentication patterns, evaluation creation, and common debugging.

Test and evaluate MCP server tools in the current Claude Code session. Use when auditing MCP configurations, validating tool quality, testing MCP servers end-to-end, generating test cases, checking tool descriptions and schemas, analyzing tool efficiency and redundancy, or debugging MCP integration issues. Covers tool discovery, quality analysis, test generation with AAA pattern, execution, rating, and cross-tool redundancy analysis.

Evaluate research rigor and scientific claims. Assess methodology, experimental design, statistical validity, biases, confounding, and evidence quality using GRADE, Cochrane ROB, and preregistration standards. Use for critical analysis of research papers, evaluating AI/ML study claims, reviewing preprints, or fact-checking scientific assertions in any domain.

Explore user intent, requirements and design before implementation through structured dialogue and design proposals. Use when asked to: create features, build components, add functionality, modify behavior, plan projects, or when user says 'help me design X', 'what should we build', 'let's brainstorm', or starts describing a new feature without a design.

Interact with the Paperclip control plane API to manage tasks, coordinate agents, track goals, and run your AI-powered company. Use when working with Paperclip issues, agents, projects, or goals.

Battle-tested engineering principles for AI coding agents. Covers plan-first workflow, subagent delegation, self-improvement loops, verification gates, elegant solutions, autonomous bug fixing, and structured task management. Use when configuring agent behavior, writing AGENTS.md files, or improving agent reliability and code quality.

Write marketing copy and App Store / Google Play listings (ASO keywords, titles, subtitles, short+long descriptions, feature bullets, release notes), plus screenshot caption sets and text-to-image prompt templates for generating store screenshot backgrounds/promo visuals. Use when asked to: write/refresh app marketing copy, craft app store metadata, brainstorm taglines/value props, produce ad/landing/email copy, or generate prompts for screenshot/creative generation.

Review documents, proposals, and plans through the lens of a CEO. Simulates feedback from a founder-CEO who is technical, data-driven, and focused on long-term vision while navigating market volatility. Use when you want high-level strategic review: does this idea make sense as a company bet? Is the team right-sized? Will this survive a downturn? Is it community-first?

Review documents, proposals, and plans through the lens of a senior principal engineer. Simulates feedback from a technically deep IC who values clarity, pragmatism, and shipping velocity. Use when you want direct, blunt technical feedback on a proposal, architecture doc, design doc, or spec — especially around structure, tradeoffs, and scope.

Review documents, proposals, and plans through the lens of a CTO. Simulates feedback from a technical leader who has built and scaled multiple companies and values platform thinking, mobile-first craft, and iterative execution. Use when you need engineering leadership review: platform strategy, architecture decisions, team structure proposals, or anything that needs a 'will this scale and can we ship fast?' lens.

Expert direct mail marketing strategist for writing compelling copy, designing high-converting mail pieces, and developing measurement strategies. Use when planning direct mail campaigns, writing mailer copy, designing postcards/letters, or measuring campaign effectiveness with incremental lift analysis.