CI/CD

Industrial-strength NLP with spaCy 3.x for text processing and custom classifier training. Use when: installing spaCy, selecting models (en_core_web_sm/md/lg/trf), tokenization, POS tagging, named entity recognition, dependency parsing, training TextCategorizer models, troubleshooting errors (E050/E941 model errors, E927 version mismatch, memory issues), batch processing with nlp.pipe, or deploying models to production. Includes data preparation scripts, config templates, and FastAPI serving examples.

Sets up a new Rust/Python hybrid library project using maturin and uv. Creates project structure with PyO3 bindings, installs dev dependencies, and optionally configures git remote. Use when the user wants to initialise a Python library with Rust extensions.

Generate CircleCI configuration files with workflows, orbs, and deployment. Triggers on "create circleci config", "generate circleci configuration", "circleci pipeline", "circle ci setup".

Use when creating or editing skills, before deployment, to verify they work under pressure and resist rationalization - applies RED-GREEN-REFACTOR cycle to process documentation by running baseline without skill, writing to address failures, iterating to close loopholes

Analyzes and optimizes database queries for performance and efficiency

Construct temporary, session-specific memory palaces for complex projects and conversations.

Guide for creating and working in Git worktrees with a consistent workflow. Use when a user wants to run a task in a separate worktree, create or clean up worktrees, migrate a repo into a main/worktrees layout, or implement work based on an issue ID using GitHub/GitLab tooling.

Better Auth authentication library for TypeScript. Covers session management, passkeys, social auth, and organization features. Triggers on better-auth, auth, session, passkey.

Create GitHub issues from TASK-???.md files. Use when you need to bulk-create GitHub issues from task markdown files with frontmatter containing title, label, parent, and project attributes. Automatically extracts frontmatter, creates issues via gh CLI, links parent issues, and adds to specified projects.

Reviews finished and in-progress digital products to assess adherence to design specifications and discover potential issues with those specifications. Validates implementation against design intent, identifies visual and interaction discrepancies, and provides actionable feedback for design and engineering teams.

Real-time rope/cable physics using Position-Based Dynamics (PBD), Verlet integration, and constraint solvers. Expert in quaternion math, Gauss-Seidel/Jacobi solvers, and tangling detection. Activate on 'rope simulation', 'PBD', 'Position-Based Dynamics', 'Verlet', 'constraint solver', 'quaternion', 'cable dynamics', 'cloth simulation', 'leash physics'. NOT for fluid dynamics (SPH/MPM), fracture simulation (FEM), offline cinematic physics, molecular dynamics, or general game physics engines (use Unity/Unreal built-ins).

Adds reactive and declarative behavior to HTML with minimal JavaScript using Alpine.js directives. Use when adding lightweight interactivity to server-rendered pages, building interactive components without a build step, or when user mentions Alpine.js, x-data, or Tailwind-style reactivity.

Format concise, actionable test plans for Jira tickets using existing fptest tools and minimal MongoDB operations

TLA+ formal verification for modeling and verifying concurrent algorithms and distributed systems.Use when asked about: TLA+, formal verification, model checking, verify algorithm, verify spec,check invariants, race condition analysis, concurrency model, TLC, Apalache, formal spec,temporal logic, prove correctness, state machine verification, model concurrent, TOCTOU,double-check locking, create TLA spec, run TLC, explain counterexample, verify safety,liveness property, deadlock detection, formal methods.Capabilities: Create specs from templates, run TLC/Apalache, generate CI pipelines,check code-spec drift, explain counterexamples, generate tests from invariants.

Generate compelling cover images and in-article illustrations for technical articles using the imagen CLI tool. Use when asked to "generate images", "create cover image", "make article illustrations", "create visual assets", or "add images to article". Handles both high-impact conceptual cover images and technical diagrams/illustrations for specific concepts. Includes prompt engineering best practices and SEO-friendly image integration.

Master RESTful API design principles, HTTP methods, status codes, request/response patterns, versioning, and API best practices for production applications.

開発における基本原則（曖昧さ禁止、矛盾検出、推察禁止）を定義する。要件定義時、仕様確認時、設計レビュー時、またはユーザーが曖昧な要件、仕様の矛盾、不明点の確認、推測回避に言及した際に使用する。

Download videos, audio, playlists, and channels from YouTube and 1000+ websites using yt-dlp. Supports quality selection, format conversion, subtitle download, playlist filtering, metadata extraction, thumbnail download, and batch operations. Use when downloading YouTube videos in any quality (4K, 8K, HDR), extracting audio as MP3/M4A/FLAC, downloading entire playlists/channels, getting subtitles in multiple languages, converting to specific formats, downloading live streams, archiving content, or batch processing multiple URLs. Optimized for reliability with automatic retries, rate limiting, and error handling.

Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.

Use when performing mathematical physics computations - Lie algebras, quantum chemistry, neural operators, theorem proving, or scientific validation. Provides guidance on Theory2 CLI usage, computational workflows, and verification methodology.