ddd-da-massa
Practical DDD patterns for Jakarta EE web applications with cognitive load distribution. Use when designing controllers, entities, services, or evaluating cohesion and load balance.
gof-design-patterns
Detects opportunities to apply GoF Design Patterns in Jakarta EE/MicroProfile. Use when reviewing code for structural improvements or implementing creational, structural, or behavioral patterns.
lombok-patterns
Lombok annotations and best practices for Java 21+ projects. Use when reducing boilerplate, configuring builders, or choosing between Lombok and Records.
mapstruct-patterns
Constructor-based MapStruct mapping for compile-time safety in Jakarta EE. Use when implementing DTO mapping or using @Default annotations.
quarkus-panache-smells
Detects and refactors ORM code smells in Quarkus Panache applications using the Repository pattern. Use when reviewing PanacheRepository code, diagnosing N+1 queries, data overfetching, or pagination issues.
refactoring-catalog
Identifies code smells and applies refactoring techniques from Martin Fowler's catalog. Use when improving code structure, reducing complexity, or eliminating smells without changing behavior.
rest-api-design
REST API design patterns and MicroProfile OpenAPI documentation. Use when designing endpoints, choosing HTTP methods, status codes, or documenting APIs with OpenAPI annotations.
testing-patterns
REST integration testing patterns with JUnit 5, Mockito, RestAssured. Use when writing integration tests that mock external dependencies, use Testcontainers/H2 for databases, and test endpoints with raw JSON bodies.
arxiv-search
Search arXiv for preprints and scholarly articles across physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering, systems science, and economics. Supports field-specific queries (title, author, abstract, category), boolean logic, date filtering, and bulk retrieval with pagination.
cbdb-api
Query the China Biographical Database (CBDB) API to retrieve comprehensive biographical data about historical Chinese figures. Use this skill when searching for information about Chinese historical figures, scholars, officials, or literary figures from the 7th century BCE through the 19th century CE. Applicable for queries about biographical details, social relationships, official positions, or when users mention specific Chinese names or CBDB person IDs.
cbdb-local
Query the China Biographical Database (CBDB) locally via SQLite for biographical data on 656K+ historical Chinese figures from the 7th century BCE through the 19th century CE. Use when searching for Chinese historical figures, scholars, officials, or literary figures — their biographical details, family/kinship networks, official postings, social associations, examination records, or addresses. Runs entirely locally after initial database download (~556 MB). Faster and more flexible than the API version.
chgis-tgaz
Query the China Historical GIS (CHGIS) Temporal Gazetteer (TGAZ) API to search for historical Chinese placenames from 222 BCE to 1911 CE. Use this skill when searching for information about historical Chinese places, administrative units, or geographic locations during the dynastic period. Applicable for queries about historical place names, administrative hierarchies, or when users mention specific Chinese locations with historical context.
cjk-calendar
Convert between Chinese, Japanese, Korean, and Vietnamese lunisolar calendar dates and Gregorian/Julian dates. Use when the user needs to look up historical East Asian dates, convert era names (年號) like 康熙, 天保, 崇禎 to Western dates, compute sexagenary cycle (干支) day/month/year, or work with Julian Day Numbers. Supports ~220 BCE to 1945 CE with 1,637 eras and 131,808 lunar month records. Runs entirely locally with a SQLite database.
columbia-clio
Search Columbia University Libraries' CLIO catalog for books, journals, manuscripts, and other holdings via its Blacklight JSON API. Use this skill whenever the user wants to look up items in Columbia's library, check availability of books at Columbia, search by title/author/subject with faceted filtering by format/language/location, or retrieve detailed catalog records including call numbers and holdings data. Triggers when referencing Columbia University collections or Ivy League library holdings.
europeana-collections
Search Europeana's 50M+ cultural heritage items from 4,000+ European museums, galleries, libraries, and archives. Use this skill whenever the user wants to find European art, manuscripts, photographs, maps, 3D objects, audio, or video from institutions like the Rijksmuseum, British Library, Louvre, or Gallica. Also triggers when searching for open-access European cultural heritage, IIIF resources, or cross-referencing European collections with other library catalogs.
harvard-library-catalog
Search Harvard Library's 13M+ bibliographic records via LibraryCloud and retrieve MARC/MODS data via PRESTO. Use this skill whenever the user wants to look up books, manuscripts, finding aids, or other items in Harvard's library catalog, verify bibliographic information (title, author, ISBN, publication date), find digital collections, or retrieve detailed catalog records. Also triggers when a user extracts a book title from a document and wants to find its full bibliographic metadata.
hathitrust-catalog
Look up bibliographic records and digitized volumes in HathiTrust's 17M+ volume collection by ISBN, OCLC, LCCN, ISSN, or HathiTrust ID. Use this skill whenever the user wants to check if a book has been digitized, find which libraries hold a copy, get MARC metadata for a known identifier, or link a bibliographic reference to its HathiTrust digital version. Also triggers when cross-referencing identifiers from other library catalogs (Harvard, Library of Congress) against HathiTrust holdings.
historical-map
Generate interactive historical maps as standalone HTML files using Leaflet.js. Supports markers with popups, GeoJSON boundary overlays, historical tile layers (Academia Sinica, MapWarper), image overlays, WMS layers, and layer controls. Use when the user asks to create, build, or visualize a map of historical places, routes, boundaries, or events.
historical-timeline
Generate interactive historical timelines as standalone HTML files using TimelineJS3. Supports BCE/CE dates, eras, media, groups, and rich text. Use when the user asks to create, build, or visualize a timeline of historical events, periods, dynasties, or biographical milestones.
jbdb-api
Query the Japan Biographical Database (JBDB) API to retrieve biographical data about historical Japanese figures. Use this skill when searching for information about Japanese historical figures, samurai, monks, artists, poets, or other individuals. Applicable for queries about biographical details, kinship relations, non-kinship associations, events, personal history, occupations, or when users mention specific Japanese names or JBDB person IDs.
loc-catalog
Search the Library of Congress digital collections via the loc.gov JSON API. Use this skill whenever the user wants to search LOC's digitized books, photos, maps, manuscripts, newspapers, audio, or film/video, look up items by LCCN, browse LOC collections, find primary sources with date range filters, or retrieve citations and download links for LOC materials. Also triggers when cross-referencing items found in other library catalogs against LOC holdings.
nlb-singapore
Search the National Library Board (NLB) Singapore catalog for books, audiovisual materials, and digital resources via the official Catalogue API. Use this skill whenever the user wants to search Singapore's national library holdings, check book availability across NLB branches, look up titles by ISBN/BRN, find new arrivals, browse checkout trends, or retrieve detailed bibliographic records from NLB. Triggers when referencing Singapore library collections, Southeast Asian library holdings, or NLB resources.
tgaz-query
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wikidata-search
Search for items and properties on Wikidata and retrieve entity details, claims, and external identifiers. Supports both keyword search (Wikidata Action API) and semantic/hybrid search (Wikidata Vector Database), plus direct entity retrieval (Special:EntityData) and structured querying (WDQS SPARQL).
zotero-local
Interact with a local Zotero 8 desktop application through its HTTP API at localhost:23119. Use this skill whenever the user wants to search, fetch, add, edit, or organize bibliographic items in their Zotero library, import citations (BibTeX, RIS, etc.), attach files, manage collections and tags, or retrieve full-text content from Zotero. Triggers on mentions of Zotero, citation management, reference libraries, bibliographic databases, or local library management. Also use when chaining with other catalog skills (Harvard, LOC, HathiTrust, etc.) to save found records into the user's Zotero library.
mindwork-analyze
Analyze therapy session transcripts or journal entries. Identifies cognitive patterns, emotional themes, and tracks progress over time. Automatically references recent analyses for context. Use for session analysis, journal reflection analysis, or pattern identification.
mindwork-insights
Build and maintain a personal profile from therapy sessions and journal entries. Creates a living document that accumulates self-knowledge about patterns, strengths, coping strategies, and growth over time. Unlike other skills, insights updates an existing profile rather than creating new files.
mindwork-progress
Track progress over time across therapy sessions and journal entries. Supports trend analysis, session comparisons, period summaries, and goal tracking. Reads from analysis files and generates comprehensive progress reports.
mindwork-summary
Generate summaries of therapy sessions and journal entries at various lengths and for different audiences. Supports action item extraction, highlights reels, and session prep. Use for quick recaps, sharing with others, or preparing for your next session.
mindwork-transcribe
Transcribe therapy session recordings to formatted text. Converts audio to clean, speaker-labeled transcripts (Me/Therapist format) with grammar correction and English translation. Use when processing therapy recordings, session audio, or any two-person conversation recording.
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. This workflow helps users efficiently transfer context, refine content through iteration, and verify the doc works for readers. Trigger when user mentions writing docs, creating proposals, drafting specs, or similar documentation tasks.
docx
Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks
internal-comms
A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill whenever asked to write some sort of internal communications (status reports, leadership updates, 3P updates, company newsletters, FAQs, incident reports, project updates, etc.).
Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.
pptx
Presentation creation, editing, and analysis. When Claude needs to work with presentations (.pptx files) for: (1) Creating new presentations, (2) Modifying or editing content, (3) Working with layouts, (4) Adding comments or speaker notes, or any other presentation tasks
xlsx
Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas
django-vue-flutter
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better-auth
Guide for implementing Better Auth - a framework-agnostic authentication and authorization framework for TypeScript. Use when adding authentication features like email/password, OAuth, 2FA, passkeys, or advanced auth functionality to applications.
chrome-debug
How to use Chrome DevTools MCP for browser debugging. Use when you need to inspect pages, take screenshots, debug UI issues, or verify visual changes.
cloudflare-browser-rendering
Guide for implementing Cloudflare Browser Rendering - a headless browser automation API for screenshots, PDFs, web scraping, and testing. Use when automating browsers, taking screenshots, generating PDFs, scraping dynamic content, extracting structured data, or testing web applications. Supports REST API, Workers Bindings (Puppeteer/Playwright), MCP servers, and AI-powered automation. (project)
cloudflare-r2
Guide for implementing Cloudflare R2 - S3-compatible object storage with zero egress fees. Use when implementing file storage, uploads/downloads, data migration to/from R2, configuring buckets, integrating with Workers, or working with R2 APIs and SDKs.
cloudflare-workers
Comprehensive guide for building serverless applications with Cloudflare Workers. Use when developing Workers, configuring bindings, implementing runtime APIs, testing Workers, using Wrangler CLI, deploying to production, or building edge functions with JavaScript/TypeScript/Python/Rust.
cloudflare
Guide for building applications on Cloudflare's edge platform. Use when implementing serverless functions (Workers), edge databases (D1), storage (R2, KV), real-time apps (Durable Objects), AI features (Workers AI, AI Gateway), static sites (Pages), or any edge computing solutions.
Defense-in-Depth Validation
Validate at every layer data passes through to make bugs impossible
Root Cause Tracing
Systematically trace bugs backward through call stack to find original trigger
Systematic Debugging
Four-phase debugging framework that ensures root cause investigation before attempting fixes. Never jump to solutions.
Verification Before Completion
Run verification commands and confirm output before claiming success
docker
Guide for using Docker - a containerization platform for building, running, and deploying applications in isolated containers. Use when containerizing applications, creating Dockerfiles, working with Docker Compose, managing images/containers, configuring networking and storage, optimizing builds, deploying to production, or implementing CI/CD pipelines with Docker.
mcp-builder
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) or Node/TypeScript (MCP SDK).
mongodb
Guide for implementing MongoDB - a document database platform with CRUD operations, aggregation pipelines, indexing, replication, sharding, search capabilities, and comprehensive security. Use when working with MongoDB databases, designing schemas, writing queries, optimizing performance, configuring deployments (Atlas/self-managed/Kubernetes), implementing security, or integrating with applications through 15+ official drivers. (project)
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