The directory for
Claude Code skills
Stop hunting across scattered repos. Search by task and install the best prompts and orchestrators in one command.
Find the right skill for the task
Community-built prompts and orchestrators, organised around the work you need Claude Code to do.
Algorithmic Art
Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems.
To Spec
Turn the current conversation into a spec and publish it to the project issue tracker — no interview, just synthesis of what you've already discussed.
Obsidian Bases
Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries. Use when working with .base files, creating database-like views of notes, or when the user mentions Bases, table views, card views, filters, or formulas in Obsidian.
Triage
Move issues and external PRs through a state machine of triage roles — categorise, verify, grill if needed, and write agent-ready briefs.
Nyc Acris
Look up ACRIS property transaction records for any NYC property — deeds, mortgages, satisfactions, liens, and ownership history. Use when the user asks who owns a building, when it last sold or for how much, or whether there are mortgages or liens against it.
Setup Matt Pocock Skills
Configure this repo for the engineering skills — set up its issue tracker, triage label vocabulary, and domain doc layout. Run once before first use of the other engineering skills.
Prototype
Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model or logic feels right, or explore what a UI should look like.
Spec Writer
CSI outline specification writer — takes a materials or products list and generates structured specs with MasterFormat divisions, performance criteria, and acceptable manufacturers.
Slide Deck Generator
Generate a polished HTML slide deck from a topic, outline, or data. Outputs a self-contained .html file with keyboard/touch navigation, responsive typography, and the ALPA (Alpaca Labs) design system — Helvetica, editorial layout, clean white backgrounds.
Receiving Code Review
Use when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not performative agreement or blind implementation
Product Data Cleanup
Clean up an FF&E schedule — normalize casing, dimensions, units, language, materials, and formatting for consistency.
Nyc Hpd
Look up HPD violations, complaints, and building registration for residential buildings.
MCP Server Patterns
Build MCP servers with Node/TypeScript SDK — tools, resources, prompts, Zod validation, stdio vs Streamable HTTP. Use Context7 or official MCP docs for latest API.
Domain Modeling
Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, record an architectural decision, or when another skill needs to maintain the domain model.
Resolving Merge Conflicts
Use when you need to resolve an in-progress git merge/rebase conflict.
Claude API
Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration.
Bun Runtime
Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.
Mle Workflow
Production machine-learning engineering workflow for data contracts, reproducible training, model evaluation, deployment, monitoring, and rollback. Use when building, reviewing, or hardening ML systems beyond one-off notebooks.
Intent Layer
Set up hierarchical Intent Layer (AGENTS.md files) for codebases. Use when initializing a project, adding context infrastructure, setting up AGENTS.md, or scaffolding AI-friendly project documentation.
History
Neighborhood context and history — adjacent uses, architectural character, landmarks, commercial activity, and planned development from an address.
Xlsx
Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data)…
Migrate To Shoehorn
Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.
Product Match
Find visually or functionally similar products from an image, name, or description.
Product Image Processor
Download, resize, and remove backgrounds from product images at scale
Twitter Algorithm Optimizer
Analyze and optimize tweets for maximum reach using Twitter's open-source algorithm insights. Rewrite and edit user tweets to improve engagement and visibility based on how the recommendation system ranks content.
Academic Paper Reviewer
Multi-perspective academic paper review with dynamic reviewer personas. Simulates 5 independent reviewers (EIC + 3 peer reviewers + Devil's Advocate) with field-specific expertise. Supports full review, re-review (verification), quick assessment, methodology focus, Socratic…
Karpathy Guidelines
Behavioral guidelines to reduce common LLM coding mistakes. Use when writing, reviewing, or refactoring code to avoid overcomplication, make surgical changes, surface assumptions, and define verifiable success criteria.
Decision
Capture a project decision as an ADR-style record in decisions/NNNN-slug.md — context, options considered, the call, consequences, status.
Teach
Teach the user a new skill or concept, within this workspace.
Product Enrich
Auto-tag FF&E products with categories, colors, materials, and style tags using AI.
Handoff
Compact the current conversation into a handoff document for another agent to pick up. Captures decisions, constraints, and file references without lossy summarisation.
Ask Matt
Ask which skill or flow fits your situation. A router over the skills in this repo.
Grilling
Grill the user relentlessly about a plan or design. Use when the user wants to stress-test a plan before building, or uses any 'grill' trigger phrases.
Code Review
Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes — Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match what the originating issue/PRD asked for?). Runs both reviews in parallel…
Pptx
Use this skill any time a .pptx file is involved in any way — as input, output, or both. This includes: creating slide decks, pitch decks, or presentations; reading, parsing, or extracting text from any .pptx file (even if the extracted content will be used elsewhere, like in…
Resize Images
Batch-resize images for web (WebP at 1920/1200/400px), social (center-cropped WebP at Instagram square/portrait, Twitter/X, LinkedIn), slides (center-cropped JPEG at 1024×768 and 1920×1080), and print (300 DPI JPEG at ARCH A 9×12, ARCH B 12×18, ARCH C 18×24).
Nyc Dob Violations
Look up open and resolved DOB and ECB violations for any NYC building, with class, status, and penalty detail. Use when the user asks whether a building has violations, stop-work orders, or outstanding ECB penalties. NYC only; for housing-code violations use /nyc-hpd.
Competitive Report Structure
Use after benchmark-methodology has produced scored competitor profile cards. Assembles findings into a decision-grade report: landscape map, competitor profiles, benchmarking matrix, white-space analysis, strategic recommendations, and team alignment trigger questions.
Tdd
Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.
Grill Me
A relentless interview to sharpen a plan or design.
Web Artifacts Builder
Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui).
Nyc Bsa
Look up Board of Standards and Appeals (BSA) variances and special permits for any NYC property. Use when checking whether a lot carries zoning relief — variances, special permits, appeals — that modifies its as-of-right envelope.
Workplace Programmer
AI workplace strategy consultant that builds office space programs through conversation — area splits, room schedules, seat counts, and reports.
Product Spec Bulk Fetch
Fetch structured FF&E product specs from a list of URLs. Extracts name, brand, dimensions, materials, price, and images into a standardized schedule.
Doc Coauthoring
Guide users through a structured workflow for co-authoring documentation. Use when user wants to write documentation, proposals, technical specs, decision docs, or similar structured content.
Color Palette Generator
Color palette generator — creates harmonious color palettes from descriptions, moods, or images. Outputs a self-contained HTML file with swatches, hex/RGB/HSL codes, contrast ratios, and example pairings.
Dispatching Parallel Agents
Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
Implement
Implement a piece of work based on a spec or set of tickets.
One path from task to working skill
Spellbook replaces repo hunting with a repeatable flow: search in the language of the job, inspect the skill, then install it.
npx skills add spellbook/<skill>Describe the task, not the package name.
Review the prompt, author, and intended trigger.
Bring the skill into your workflow in one command.