agent-skills

Build WCAG 2.2 AA compliant interfaces with semantic HTML, ARIA, keyboard navigation, focus management, color contrast, and screen reader support. Covers forms, dialogs, tabs, live regions, skip links, alt text, and data tables. Use when implementing accessible UIs, auditing WCAG compliance, fixing screen reader issues, keyboard navigation, focus traps, or troubleshooting "focus outline missing", "aria-label required", "insufficient contrast", "missing alt text", "heading hierarchy".

Multi-agent design patterns for Claude Code and AI development systems. Covers custom subagents, built-in subagents (Explore/Plan/General-purpose), fungible vs specialized agents, delegation, orchestration, batch workflows, context hygiene, and failure recovery. Use when: designing multi-agent systems, creating custom subagents, delegating bulk operations, orchestrating parallel work, choosing between fungible and specialized agents, configuring agent frontmatter, or debugging agent coordination issues.

Coding Agent Session Search - unified CLI/TUI to index and search local coding agent history from Claude Code, Codex, Gemini, Cursor, Aider, ChatGPT, Cline, OpenCode, Amp, Pi-Agent, Factory, and more. Use when searching past agent conversations, indexing coding session history, finding previous solutions across agents, or querying session logs with CASS CLI robot mode.

Defines behavioral and cognitive standards for senior AI engineering agents. Use when configuring agent reasoning protocols, memory management, or context engineering strategies. Use for autonomous reasoning, tiered memory systems, verifiable goal execution, multi-agent orchestration, and token optimization.

Core AWS services for application developers. Covers S3 (storage, presigned URLs, lifecycle), Lambda (functions, layers, cold starts), IAM (roles, policies, least privilege), DynamoDB (single-table design, GSI/LSI, streams), SQS/SNS (queues, topics, fan-out), CloudFront (CDN, caching), RDS/Aurora (Postgres/MySQL, connection pooling), ECR/ECS/Fargate (containers), Route 53 (DNS), Secrets Manager, and CDK v2 (TypeScript IaC, constructs, stacks, testing). Use when building AWS infrastructure, writing CDK stacks, configuring IAM policies, designing DynamoDB tables, setting up Lambda functions, creating S3 presigned URLs, deploying containers on ECS/Fargate, or configuring CloudFront distributions.

API testing patterns with supertest, MSW, and Vitest. Covers integration testing for REST APIs, HTTP request mocking with Mock Service Worker v2, response assertions, schema validation, test organization, and framework-specific patterns for Express, Fastify, and Hono. Use when writing integration tests for REST APIs, mocking HTTP requests, or testing API endpoints. Use for api-test, supertest, msw, mock-service-worker, integration-test, http-mock, endpoint-test, request-test.

Application security covering threat modeling (STRIDE), OWASP Top 10 (2025), OWASP API Security Top 10 (2023), secure coding review, authentication/authorization patterns, input validation, encryption, security headers, supply chain security, compliance (GDPR/HIPAA/SOC2/PCI-DSS), and security monitoring. Use when reviewing code for vulnerabilities, implementing auth patterns, securing APIs, configuring security headers, hardening supply chain, preventing injection attacks, or preparing for compliance audits.

ArkType runtime validation with TypeScript-native syntax. Type-safe schemas using string expressions, morphs, scopes, and generics. Includes ArkEnv for typesafe environment variable validation with auto-coercion and Vite plugin. Use when defining schemas, validating data, transforming input, building type-safe APIs with ArkType, or validating environment variables with ArkEnv.

Organize design assets, optimize images and fonts, maintain brand asset libraries, implement version control for assets, and enforce naming conventions. Use when optimizing images for web, converting fonts to WOFF2, organizing asset directories, setting up responsive image pipelines, or managing logo variants.

Astro web framework patterns for content-driven sites. Covers content collections with Zod schemas and loaders, island architecture with selective hydration directives, view transitions with ClientRouter, server-side and hybrid rendering modes, server islands, Astro DB with astro:db, middleware with onRequest, and framework integrations (React, Svelte, Vue). Use when building content-driven websites, configuring island hydration strategies, setting up view transitions, choosing between static and server rendering, integrating UI framework components, defining content collection schemas, or adding middleware.

Use when working in a repository that uses bd or Beads for durable project task tracking, issue dependencies, blocker management, multi-session handoff, or shared work memory. Trigger when the user asks to find ready work, claim or close tasks, create follow-up work, inspect blockers, recover project context, or choose between local planning and persistent project tracking.

Beads Viewer - Graph-aware triage engine for Beads projects. Computes PageRank, betweenness, critical path, and cycles. Use when triaging beads tasks, analyzing dependency graphs, finding bottlenecks, detecting circular dependencies, planning parallel execution tracks, or generating sprint burndown data.

Converts markdown plans into beads (tasks with dependencies) and polishes them until implementation-ready. The bridge between planning and agent swarm execution. Use when converting a plan to beads, polishing bead descriptions, adding test coverage beads, reviewing bead dependencies, or preparing tasks for agent swarm execution.

Self-hosted TypeScript auth framework with social auth, 2FA, passkeys, organizations, RBAC, and 15+ plugins. Supports Drizzle/Prisma/Kysely adapters. Self-hosted alternative to Clerk/Auth.js. Use when: configuring auth, adding plugins, social OAuth, multi-tenant SaaS, organizations with teams and RBAC, two-factor authentication (TOTP/OTP/backup codes), email verification, password reset flows, session management, rate limiting, CSRF and cookie security, Expo/mobile, D1 adapter errors, TanStack Start integration, additionalFields bugs, admin plugin, migrating from NextAuth, migrating from Clerk, migrating from Supabase Auth, or troubleshooting auth issues.

Creates cohesive brand identities including logos, color palettes, typography systems, and brand guidelines documents. Generates SVG logo components with variants, configures Tailwind color tokens, builds type scales, and produces social media and business card templates. Use when designing a logo, building a color palette, setting up typography systems, creating brand guidelines, generating social media templates, or organizing brand asset files. Use for branding, visual identity, logo design, brand guidelines, color systems.

Bun JavaScript runtime, bundler, and package manager. Covers Bun.serve() HTTP server, Bun.file() I/O, SQLite, password hashing, Bun.build() bundler, bun:test runner, and package management. Use when building with Bun APIs, running scripts with Bun, bundling code, managing packages with bun install/add, or writing tests with bun:test.

Changesets for versioning and changelog management in monorepos. Use when managing package versions, generating changelogs, or publishing packages. Use for changesets, versioning, changelog, semver, monorepo-versioning, release, publish, bump.

Browser automation via Chrome extension and DevTools MCP. Use when controlling a logged-in Chrome browser, automating workflows, filling forms, extracting data, debugging web apps, reading console logs, or running scheduled browser tasks. Use for browser testing, form automation, data extraction, web scraping, authenticated browsing.

CI/CD pipelines, deployment strategy, and infrastructure. Use when setting up GitHub Actions workflows, choosing deployment platforms, configuring production environments, securing pipelines with OIDC, optimizing build performance, building container images, measuring DORA metrics, or setting up Docker multi-stage builds.

Performs advanced CLI operations, structured data transformation, and Unix forensics with modern Rust-powered tools. Use when searching codebases with ripgrep, transforming JSON or YAML with jq, refactoring across files with sed and fd, debugging APIs with httpie, or navigating directories with zoxide.

Cloudflare Workers, KV, D1, R2, Pages, and Wrangler CLI. Use when deploying to the edge, configuring Workers, managing storage bindings, or setting up Cloudflare Pages.

Performs semantic code intelligence and token optimization through context engineering and automated context packing. Use when reducing token overhead for large codebases, creating repository digests with Gitingest, packaging code context with Repomix, or tracing cross-file dependencies with llm-tldr.

Makes AI-generated prose sound natural and human-written. Covers tone analysis, sentence variation, voice consistency, readability improvement, and AI-typical pattern removal including hedging, filler words, and over-qualification. Use when improving blog posts, marketing copy, or narrative documentation. Use for tone consistency, readability, sentence rhythm, and removing AI-typical writing patterns.

Coolify self-hosted PaaS for deploying applications, databases, and services via REST API and Git integration. Covers API authentication, deployment triggers, build packs (Nixpacks, Dockerfile, Compose), CI/CD with GitHub Actions webhooks, environment management, and Traefik proxy configuration. Use when deploying apps to Coolify, triggering deployments via API, configuring build packs, setting up GitHub Actions CI/CD pipelines, managing environment variables, or troubleshooting deployment failures.

CSS animations, transitions, keyframes, and modern motion APIs. Use when adding animations, transitions, scroll-driven effects, or view transitions. Use for css-animation, transition, keyframes, view-transitions, scroll-animation, transform, motion-preference, animation-timeline.

Charts, dashboards, and data visualizations using Recharts, Chart.js, and D3.js. Use when building charts, dashboards, or interactive data displays. Use for chart type selection, data storytelling, annotation patterns, responsive design, accessibility, and performance optimization.

Database security auditor specialized in Row Level Security (RLS) enforcement, Zero-Trust database architecture, and forensic audit trails. Covers Supabase RLS policies, Postgres security, Convex auth guards, PGAudit configuration, JIT access controls, and database-specific compliance validation. Use when auditing database access policies, implementing RLS in Supabase or Postgres, configuring Convex auth guards, setting up audit logging, reviewing database security, or validating database-level compliance requirements.

Enforces database integrity for PostgreSQL and Prisma systems. Use when designing schemas, writing migrations, or configuring Row-Level Security. Use for type-safe SQL, naming alignment, constraint validation, zero-trust RLS policies, UUIDv7 primary keys, and zero-downtime deployments.

Removes AI writing artifacts from documentation and code. Use when editing LLM-generated prose, reviewing READMEs, polishing docs before publishing, or cleaning up AI-generated code. Use for emdash cleanup, formulaic phrase removal, tone calibration, over-commented code, verbose naming, and AI code smell detection.

Deployment strategy patterns for zero-downtime releases. Covers blue-green, canary, rolling, and recreate strategies with rollback procedures, health checks, feature flags, progressive delivery, and environment promotion workflows. Use when choosing a deployment strategy, implementing rollback procedures, configuring health checks, setting up environment promotion pipelines, planning progressive delivery with feature flags, or reducing blast radius during releases.

Builds scalable design systems with tokens, theming, and component architecture. Use when creating design token hierarchies, theming systems, component variant patterns, or accessibility foundations. Use for design tokens, CVA variants, dark mode, multi-brand theming, Radix headless UI, Storybook documentation, and governance.

Blocks dangerous commands before execution via a Rust-based Claude Code hook. Use when configuring agent safety guards, setting up destructive command blocking, or auditing CLI protection rules. Use for git reset protection, rm -rf interception, force-push blocking, pack-based command filtering, and PreToolUse hook safety.

Docker containerization for development and production. Covers Dockerfiles, multi-stage builds, layer caching, Compose services, networking, volumes, health checks, security hardening, and production deployment patterns. Use when writing Dockerfiles, optimizing image size, configuring Compose services, debugging container networking, setting up health checks, hardening containers for production, or troubleshooting build cache issues.

Drizzle ORM for type-safe SQL with PostgreSQL, MySQL, and SQLite. Use when defining schemas, writing queries, managing relations, running migrations, or using drizzle-kit. Use for drizzle, orm, schema, query, migration, pgTable, relations, drizzle-kit, drizzle-zod.

E2E test architecture and patterns with Playwright. Use when designing test suites, structuring Page Object Models, planning CI sharding strategies, setting up authentication flows, or organizing tests with tags and annotations. Use for test architecture, accessibility auditing with axe-core, network mocking strategies, visual regression workflows, HAR replay, and storageState authentication patterns. For Playwright API details, browser automation, or web scraping, use the playwright skill instead.

ElectricSQL real-time Postgres sync engine using Shapes for partial replication. Covers ShapeStream API, React hooks, where clause filtering, column selection, auth proxy patterns, and progressive write strategies from online-only to through-the-database. Use when setting up ElectricSQL, configuring Postgres sync, implementing shape-based data loading, building auth proxies for shapes, or choosing write patterns for local-first apps with Electric.

System prompt design and instruction crafting for AI agents. Covers persona definition, constraint specification, output formatting, tool use instructions, multi-turn behavior, and guardrail design. Use when writing system prompts for AI products, designing agent personas, specifying behavioral constraints, crafting tool-use instructions, or building multi-step agent workflows.

Extracts design data from Figma via the REST API and converts designs to React code. Use when syncing Figma tokens to CSS variables, exporting icons as SVG components, generating code from Figma designs, or automating design-to-code workflows. Use for design token extraction, icon export, component generation, and CI-based Figma sync.

Discovers and installs agent skills from the open ecosystem. Enriches search results with descriptions fetched from skills.sh. Use when a user asks "how do I do X", "find a skill for X", "is there a skill that can...", or wants to extend agent capabilities. Use for skill discovery, skill search, skill install, finding tools.

Builds modern React and Next.js frontends. Use when creating web applications, choosing frontend stack, structuring components, implementing UI/UX designs, or setting up project architecture. Use for React, Next.js, Tailwind CSS, shadcn/ui, server components, and component patterns.

Controls the Ghostty terminal emulator via CLI actions and configuration. Use when managing Ghostty windows, fonts, themes, keybinds, config validation, or debugging terminal configuration. Use for ghostty CLI, terminal config, theme selection, font management.

Designs git workflows covering branching strategies, trunk-based development, stacked changes, conventional commits, CI/CD pipelines, and repository hygiene. Use when setting up branching models, writing commit messages, configuring GitHub Actions, managing stacked PRs, cleaning stale branches, creating issue templates, or recovering lost commits.

GitHub Actions workflow authoring for CI/CD pipelines. Covers workflow syntax, triggers, jobs, steps, matrix strategies, caching, artifacts, reusable workflows, composite actions, secrets management, OIDC authentication, and permissions hardening. Use when creating workflows, configuring jobs, setting up caching, or automating releases. Use for github-actions, workflow, ci, cd, actions, jobs, steps, matrix, cache, artifact, secrets, reusable-workflow.

GitHub CLI workflows for repositories, issues, pull requests, actions, releases, projects, and API calls. Use when creating PRs, reviewing code, triaging issues, triggering workflows, publishing releases, managing projects, verifying attestations, or querying the GitHub API. Use for gh cli, github automation, code review, release management.

Hono ultrafast web framework for edge and server runtimes. Use when building APIs, middleware chains, or edge functions on Cloudflare Workers, Bun, Node.js, or Deno. Use for hono, api, routing, middleware, cloudflare-workers, edge, rpc, validator, context.

Ensures zero-mismatch integrity between server-rendered HTML and client-side React trees. Use when debugging hydration errors, fixing text content mismatches, handling browser extension DOM pollution, implementing selective hydration with Suspense, using the React 19 use() hook for deterministic server-to-client data bridges, or applying Next.js use cache for data drift prevention. Use for hydration mismatch, SSR, hydrateRoot, suppressHydrationWarning, onRecoverableError, two-pass rendering.

Select semantically appropriate icons for websites using Lucide, Heroicons, or Phosphor. Covers concept-to-icon mapping, React/HTML templates, and tree-shaking patterns. Use when: building feature sections, service grids, contact info, navigation, or any UI needing icons. Prevents emoji usage, ensures consistency.

Knowledge base architecture selection, curation, and governance. Use when choosing between document-based (RAG), entity-based (graph), or hybrid KB architectures, establishing content curation workflows, implementing versioning and governance, or evaluating quality metrics. For building retrieval pipelines, use the rag-implementer skill. For building knowledge graphs, use the knowledge-graph-builder skill.

Implements knowledge graphs for AI-enhanced relational knowledge. Covers ontology design, graph database selection (Neo4j, Neptune, ArangoDB, TigerGraph), entity extraction, hybrid graph-vector architecture, query patterns, and AI integration. Use when implementing knowledge graphs, designing ontologies, extracting entities and relationships, selecting a graph database, or building hybrid graph-vector search. Use for knowledge graph, ontology design, entity resolution, graph RAG, hallucination detection. For architecture selection and governance, use the knowledge-base-manager skill. For document retrieval pipelines, use the rag-implementer skill.

Local-first architecture decision framework for web applications. Covers when to go local-first vs server-based vs hybrid, sync engine selection (ElectricSQL, Zero, PowerSync, Replicache, LiveStore, Triplit), client-side storage options (IndexedDB, OPFS, SQLite WASM, PGlite), and conflict resolution strategies (LWW, CRDTs, server-wins, field-level merge). Use when deciding whether to adopt local-first architecture, choosing a sync engine, selecting client storage, or designing conflict resolution strategies.

Framework-agnostic internationalization (i18n) and localization (l10n) patterns for multilingual applications. Covers ICU message format, pluralization rules (CLDR), RTL layout with CSS logical properties, locale negotiation and detection strategies, SEO hreflang tags, cookie/header-based locale resolution, and translation workflow management. Use when adding multi-language support, choosing an i18n library, implementing pluralization or gender-aware messages, formatting dates/numbers/currencies by locale, handling RTL layouts, setting up locale detection, configuring hreflang SEO tags, or managing translation workflows.

Architects and orchestrates Model Context Protocol (MCP) ecosystems including server development, tool design, and transport configuration. Use when building MCP servers, designing agentic tool interfaces, configuring MCP transports, implementing OAuth security, or troubleshooting MCP connectivity. Use for outcome-oriented tools, Zod validation, progressive disclosure resources, elicitation, and async tasks.

Mermaid diagram syntax for flowcharts, sequence diagrams, ERDs, class diagrams, and more. Use when creating diagrams in markdown, generating architecture visuals, or documenting system flows. Use for mermaid, diagram, flowchart, sequence, ERD, class-diagram, gantt, pie-chart, mindmap.

Creates custom subagents for Claude Code with YAML frontmatter configuration in Markdown files. Covers agent scoping (project, user, CLI, plugin), tool access control, model selection, permission modes, skill preloading, and lifecycle hooks. Use when building specialized subagents, configuring tool access, selecting models, setting permission modes, or designing delegation patterns. Use for agent creation, subagent configuration, custom agent setup.

Create custom slash commands for Claude Code with markdown and YAML frontmatter. Use when building workflow automations, creating reusable prompts, or defining custom /commands. Use for slash commands, argument handling, file references, bash execution.

Create event hooks for Claude Code that trigger on tool calls, prompts, and lifecycle events. Use when automating workflows, blocking dangerous commands, protecting files, or adding notifications. Use for hooks, PreToolUse, PostToolUse, event handling, automation.

Create plugins for Claude Code that bundle skills, agents, commands, hooks, and MCP servers. Use when packaging reusable tooling, distributing agent capabilities, or building plugin manifests. Use for plugin creation, manifest configuration, component bundling.

Create agent skills following the Agent Skills open standard. Use when building new skills for Claude Code, Cursor, Gemini CLI, or other agents. Use for skill structure, SKILL.md authoring, frontmatter configuration, progressive disclosure, reference files, validation, and distribution.

Mise (formerly rtx) polyglot tool version manager, environment variable manager, and task runner. Covers tool version management (install, use, pin across Node/Python/Rust/Go/Java and more), mise.toml task definitions (scripts, dependencies, watch mode, incremental builds), environment variable management (.env integration, per-directory env, redaction), project-level tool pinning, backend system (asdf, npm, pipx, cargo, GitHub releases), and comparison with alternatives (asdf, nvm, pyenv, Makefiles). Use when configuring development tool versions, defining project tasks in mise.toml, managing per-project environment variables, setting up polyglot dev environments, migrating from asdf or nvm, or automating build/test/lint/deploy workflows with mise run.

Web animations with Motion (formerly Framer Motion) for React -- gestures, scroll effects, spring physics, layout animations, SVG, micro-interactions, loading states. Use when: drag-and-drop, scroll animations, modals, carousels, parallax, page transitions, hover effects, staggered lists, loading spinners, number counters. Troubleshoot: AnimatePresence exit, list performance, Tailwind conflicts, Next.js "use client", layout in scaled containers.

OpenAPI 3.1 specification, schema design, and code generation. Use when designing REST APIs, generating TypeScript clients, or creating API documentation. Use for openapi, swagger, api-spec, schema, code-generation, api-docs, openapi-typescript, zod-openapi.

Infrastructure as code with OpenTofu (open-source Terraform fork) and Pulumi. Covers OpenTofu HCL syntax, providers, resources, data sources, modules, state management with remote backends, workspaces, importing existing infrastructure, plan/apply workflow, variable management, output values, provisioners, and state encryption (OpenTofu-exclusive). Includes Pulumi TypeScript/Python SDKs, stack management, component resources, config/secrets, state backends, policy as code, and automation API. Common patterns for multi-environment setups, module composition, CI/CD integration, drift detection, and secret management. Use when writing or reviewing HCL configurations, managing cloud infrastructure state, migrating from Terraform to OpenTofu, building Pulumi programs in TypeScript or Python, setting up multi-environment IaC pipelines, or implementing state encryption.

Coordinates skills, frameworks, and workflows throughout the project lifecycle using pattern-based sequencing, goal decomposition, phase-gate validation, and multi-agent orchestration. Use when starting multi-phase projects, sequencing frameworks, decomposing goals into capability plans, validating phase-gate readiness, coordinating subagents, or designing MCP-based tool orchestration.

npm package publishing patterns for modern TypeScript libraries. Use when configuring package.json exports, setting up dual ESM/CJS builds, or publishing to npm. Use for npm-publish, package-json, exports, main, module, types, dual-package, provenance, prepublishOnly.

PDF engineering for extraction, generation, modification, and form filling. Use when extracting text or tables from PDFs, generating PDFs with Puppeteer, modifying PDFs with pdf-lib, filling PDF forms, or implementing PDF security. Use for AI-assisted OCR, HTML-to-PDF conversion, and document processing pipelines.

Optimize application performance and scalability. Use when investigating slow applications, scaling bottlenecks, or improving response times. Use for profiling, caching, database optimization, frontend performance, and backend tuning.

PGlite embeds PostgreSQL 17.4 in the browser and Node.js via WASM, under 3MB gzipped. Covers storage backends, queries, transactions, extensions (pgvector, pg_trgm, full-text search), live queries, React integration, multi-tab worker architecture, and Electric sync. Use when setting up PGlite, choosing storage backends, writing queries or transactions, configuring extensions, implementing live queries, integrating with React, managing multi-tab workers, or syncing with Electric.

Pino high-performance JSON logger for Node.js with worker thread transports, child loggers, redaction, and framework integrations. Use when setting up structured logging, configuring log transports, adding request correlation IDs, redacting sensitive data, or integrating with Fastify, Hono, or Express. Use for pino, logging, structured-logs, request-id, correlation, redaction, transports, pino-http, pino-pretty.

Planning methodology and session management for software projects. Covers markdown plan creation, iterative refinement, multi-model blending, phase-based implementation docs, and cross-session progress tracking. Use when starting new projects, adding major features, breaking large work into phases, resuming after context clears, or managing multi-phase implementations.

Playwright browser automation API, web scraping, and tooling. Covers locator strategies, assertions, API testing, stealth mode, anti-bot bypass, authenticated sessions, screenshots/PDFs, Docker deployment, configuration, debugging, and MCP integration with AI agents. Prevents documented errors including CI timeout hangs, extension testing failures, and navigation issues. Use when automating browsers, scraping protected sites, bypassing bot detection, generating screenshots/PDFs, configuring Playwright Test, troubleshooting Playwright errors, or learning Playwright API patterns. For E2E test architecture, Page Object Models, CI sharding strategies, or test organization patterns, use the e2e-testing skill instead.

pnpm workspace monorepo management with filtering, catalogs, and shared configs. Use when setting up monorepos, managing workspace dependencies, filtering package commands, or sharing configuration across packages.

PostgreSQL 17/18+ performance tuning and optimization. Covers async I/O configuration, query plan forensics, index strategies, autovacuum tuning, vector search optimization, connection pooling, declarative partitioning, and practical query patterns. Use when diagnosing slow queries, configuring async I/O, tuning autovacuum, optimizing vector indexes, analyzing execution plans with EXPLAIN BUFFERS, configuring PgBouncer or connection pooling, setting up table partitioning, implementing cursor pagination, or optimizing queue processing.

Prompt engineering and agentic orchestration patterns. Use when crafting prompts for reasoning models, implementing chain-of-thought or Tree-of-Thoughts, designing ReAct loops, building few-shot examples, optimizing prompt performance, structuring system prompts, using extended thinking, or designing tool use workflows. Use for prompt templates, multi-step agent workflows, structured thinking protocols, and multimodal prompting.

Modern Python development with uv, the fast Python package and project manager. Covers project management (uv init, uv add, uv sync, uv lock), virtual environments, Python version management (uv python install/pin), script runners (uv run), tool management (uvx), workspace support for monorepos, and publishing to PyPI. Includes Python patterns for FastAPI, Pydantic, async/await, type checking, pytest, structlog, and CLI tools. Use when initializing Python projects, managing dependencies with uv, configuring pyproject.toml, setting up virtual environments, running scripts, managing Python versions, building monorepos with workspaces, containerizing Python apps, or writing modern Python with type hints.

Code quality gatekeeper and auditor. Enforces strict quality gates, resolves the AI verification gap, and evaluates codebases across 12 critical dimensions with evidence-based scoring. Use when auditing code quality, reviewing AI-generated code, scoring codebases against industry standards, or enforcing pre-commit quality gates. Use for quality audit, code review, codebase evaluation, security assessment, technical debt analysis.

Implements retrieval-augmented generation pipelines. Use when building document retrieval systems, choosing chunking strategies, selecting embedding models, configuring vector stores, implementing hybrid search, or evaluating RAG quality. Use for embedding strategy, vector stores, retrieval pipelines, chunking, hybrid search, re-ranking, multi-query retrieval, parent document retrieval, contextual compression, MMR diversity selection, reciprocal rank fusion, and evaluation. For KB architecture selection and governance, use the knowledge-base-manager skill. For knowledge graphs, use the knowledge-graph-builder skill.

Build responsive HTML emails with React Email components. Covers email structure (Html, Head, Body, Container), content components (Text, Heading, Button, Link, Img), layout (Section, Row, Column), styling with inline CSS and Tailwind, custom fonts, preview text, and rendering to HTML. Use when creating transactional emails, marketing templates, or email design systems. Use for email rendering, preview, Tailwind email styling, and provider integration with Resend, Nodemailer, or SendGrid.

React error boundaries and fallback UIs for catching rendering errors. Use when handling component crashes, displaying error states, implementing error recovery, or preventing full-page crashes. Use for ErrorBoundary, componentDidCatch, getDerivedStateFromError, error fallback, error recovery, crash handling, react-error-boundary library.

React Native with Expo framework for building native mobile apps on Android, iOS, and web from a single TypeScript codebase. Covers Expo Router file-based navigation (stack, tabs, drawer), EAS Build/Submit/Update for CI/CD and OTA updates, expo-dev-client for custom development builds, Expo Modules API for native Swift/Kotlin modules, core RN patterns (StyleSheet, FlatList, Platform-specific code), native device APIs (camera, notifications, haptics), and NativeWind for Tailwind CSS styling. Use when building React Native apps with Expo, configuring Expo Router navigation, setting up EAS Build pipelines, implementing OTA updates, creating native modules, or integrating device APIs like camera and push notifications.

React 19+ patterns, performance optimization, and component architecture. Covers hooks, state management decision trees, data fetching with use() API, Server Components, React Compiler, bundle optimization, and re-render elimination. Use when building components, optimizing re-renders, fetching data, managing state, handling forms, structuring frontends, or reviewing React code.

React performance optimization patterns including memoization, code splitting, bundle size reduction, re-render elimination, and profiling. Covers React Compiler automatic optimization, manual memo/useMemo/useCallback targeting, React.lazy with Suspense, barrel file avoidance, content-visibility for large lists, startTransition for non-urgent updates, and React DevTools profiling. Use when optimizing React app performance, reducing bundle size, eliminating unnecessary re-renders, debugging slow components, code splitting, or profiling rendering bottlenecks. Use for performance audit, bundle analysis, re-render diagnosis, lazy loading, virtualization.

Low-latency synchronization with WebTransport, pub/sub messaging, CRDTs, and AI stream orchestration. Covers bidirectional streaming, transactional outbox patterns, sequence tracking, and collaborative editing. Use when building real-time collaborative UIs, implementing pub/sub messaging, handling WebTransport or WebSocket connections, orchestrating live AI token streams, or resolving conflicts with CRDTs.

Best practices for Remotion - Video creation in React. Use when creating programmatic videos with Remotion, adding animations or transitions, working with audio/captions, rendering compositions, embedding 3D content, building charts, or using Mapbox maps in video.

Repo Updater - Multi-repo synchronization with AI-assisted review orchestration. Parallel sync, agent-sweep for dirty repos, ntm integration, git plumbing. 17K LOC Bash CLI. Use when syncing multiple GitHub repositories, running agent-sweep on uncommitted changes, or orchestrating AI-assisted code review across repos.

Resend email API for sending transactional and marketing emails. Use when integrating email delivery, managing domains, handling webhooks, building email workflows with React Email, managing contacts, or sending broadcasts. Use for resend, email, transactional, broadcast, contacts, segments, webhooks, domain.

Implement performant responsive images with srcset, sizes, lazy loading, and modern formats (WebP, AVIF). Covers aspect-ratio for CLS prevention, picture element for art direction, and fetchpriority for LCP optimization. Use when adding images to pages, optimizing Core Web Vitals, preventing layout shift, implementing art direction, or converting to modern formats.

Rust language patterns and ecosystem covering ownership, borrowing, lifetimes, error handling (Result/Option, thiserror, anyhow), async with Tokio, traits, generics, serde serialization, Cargo workspaces, and testing. Includes axum web framework, ratatui terminal UI, clap CLI parsing, criterion benchmarking, cargo-deny supply chain security, cargo-dist binary distribution, and release-plz changelog automation. Use when writing Rust code, designing ownership models, building async services with Tokio/axum, creating terminal UIs with ratatui, setting up CLI applications with clap, configuring CI/CD pipelines for Rust, benchmarking with criterion, auditing dependencies with cargo-deny, or distributing binaries with cargo-dist.

Orchestrates AI-enhanced Scrum ceremonies and sprint coordination. Use when running sprint ceremonies, generating automated daily standups, engineering structured tickets, forecasting sprint capacity, or grooming backlogs. Use for fact-based standups, machine-readable tickets, predictive velocity, and backlog deduplication across GitHub Issues, Jira, and Linear.

Secures AI integrations against prompt injection, privilege escalation, and data leakage. Use when implementing defense-in-depth for LLM pipelines, applying zero-trust controls to autonomous agents, hardening server actions that interact with AI services, validating model outputs, securing MCP tool integrations, or auditing AI system access patterns and identity management. Use for OWASP LLM Top 10, prompt injection defense, agentic security, AI supply chain.

SEO architecture and content strategy for search visibility. Covers entity-first optimization, structured data, E-E-A-T signals, AI Overviews optimization, and content auditing. Use when optimizing search rankings, implementing JSON-LD schema, improving E-E-A-T signals, auditing site performance, planning topical authority, or structuring content for AI Overviews and featured snippets.

Service worker lifecycle, caching strategies, background sync, push notifications, and static routing for progressive web apps. Covers Workbox v7.4 strategies (CacheFirst, NetworkFirst, StaleWhileRevalidate), workbox-precaching for app shells, Background Sync API with cross-browser fallbacks, Push API with VAPID keys, and the Service Worker Static Routing API (Chrome 123+). Use when registering service workers, implementing offline caching, configuring background sync, adding push notifications, optimizing fetch handling with static routes, or integrating service workers with local-first sync engines.

Builds accessible, customizable component libraries using shadcn/ui with Radix UI or Base UI, Tailwind CSS 4, and React 19. Covers component ownership, oklch CSS theming, type-safe forms with Field and Zod, CLI workflows, and registry patterns. Use when adding shadcn/ui components, configuring themes, building forms with Zod, creating custom registries, or composing accessible component variants. Use for shadcn CLI, dark mode, component variants, form validation.

Shell scripting and terminal integration patterns for building tools that integrate with Zsh, Bash, and Fish. Covers completion systems (compdef/compadd, complete/compgen, fish complete), ZLE widgets, hooks (precmd/preexec/chpwd, PROMPT_COMMAND), readline, bindkey, parameter expansion, ZDOTDIR loading order, event systems, abbreviations, POSIX shell scripting, terminal control codes (ANSI/CSI escape sequences), tput, stty, signal handling, process management (job control, traps), and shell plugin distribution patterns. Use when building shell plugins, writing completion scripts, implementing terminal UI with escape sequences, managing dotfiles, creating installation scripts, handling signals and process management, or integrating native binaries with shell wrappers.

Creates, audits, and validates agent skills following the Agent Skills open standard. Covers YAML frontmatter, description writing, progressive disclosure, directory structure, 9-phase audits, severity classification, and manifest-implementation drift detection. Use when creating new skills, writing skill descriptions, auditing existing skills, detecting version drift, validating implementations match manifests, or debugging skill discovery issues.

SSH remote access patterns and secure shell utilities. Covers connections, config management, key generation (Ed25519, FIDO2), tunneling, port forwarding, file transfers, and multiplexing. Use when connecting to servers, managing SSH keys, setting up tunnels, transferring files over SSH, configuring jump hosts, or hardening SSH access.

Writes and maintains Storybook stories and interaction tests using CSF3 format. Covers component stories, play functions, visual regression testing with Chromatic, and accessibility testing. Use when creating component documentation, writing interaction tests, debugging test failures, configuring visual snapshots, or updating story structure. Use for CSF3, play functions, userEvent, Testing Library queries, Chromatic configuration, autodocs, MDX.

Stripe payment integration with Node.js SDK. Covers Checkout Sessions, Payment Intents, Subscriptions, Customer Portal, webhooks, and Stripe Elements. Use when implementing checkout flows, payment processing, subscription billing, webhook handlers, or payment forms with Stripe Elements. Use for stripe, payments, checkout, subscriptions, billing, webhooks, payment intents, stripe elements.

Svelte 5 and SvelteKit framework patterns. Covers runes ($state, $derived, $effect, $props, $bindable, $inspect), snippets, fine-grained reactivity, component composition, and event handling. SvelteKit coverage includes file-based routing, server and universal load functions, form actions, hooks, adapters, and error handling. Includes Svelte 4 to 5 migration guidance (stores to runes, on:event to onevent, slots to snippets). Use when building Svelte 5 components, configuring SvelteKit routing, implementing form actions, migrating from Svelte 4, or debugging reactivity issues.

Tailwind CSS v4 patterns and design systems. Use when configuring Tailwind themes, building components, implementing dark mode, using container queries, migrating from v3, integrating shadcn/ui, or fixing build errors. Use for tailwind, css, styling, theme, design-tokens.

TanStack Config for shared build tooling, Vite plugins, and package configuration across TanStack projects. Use when configuring TanStack library builds or contributing to TanStack packages. Use for tanstack-config, tanstack-cli, vite-plugin, package-config, library-build.

TanStack DB reactive client-side database with live queries and optimistic mutations. Use when building reactive UIs with local-first data, sync engines, or optimistic updates. Use for tanstack-db, live queries, optimistic mutations, sync engine, reactive database, local-first.

TanStack DevTools for debugging Query, Router, and Form state in React apps. Use when setting up devtools, debugging cache state, or inspecting route trees. Use for devtools, react-query-devtools, router-devtools, form-devtools, debug, inspect, cache-viewer.

TanStack Form v1 headless form state management for React. Covers field validation (sync/async, debouncing), form submission, array fields, linked fields, form composition patterns, and Standard Schema integration (Zod, Valibot, ArkType, Yup). Use when building forms with complex validation, implementing reusable form components, handling dynamic field lists, managing form state, or integrating validation libraries.

TanStack Hotkeys for type-safe keyboard shortcuts with React hooks. Use when adding keyboard shortcuts, hotkey sequences, shortcut recording, key hold detection, or platform-aware shortcut display. Use for hotkeys, keyboard-shortcuts, shortcuts, key-binding, Mod key, hotkey-recorder, key-sequences.

TanStack Pacer for rate limiting, throttling, debouncing, and async queuing. Use when controlling execution frequency, managing API rate limits, debouncing user input, or queuing async tasks. Use for pacer, throttle, debounce, rate-limit, queue, async-throttle, rate-limiting.

TanStack Query v5 server state management for React. Covers query/mutation patterns, v4-to-v5 migration (object syntax, gcTime, isPending, keepPreviousData), optimistic updates via useMutationState, SSR/hydration with HydrationBoundary, infinite queries, offline/PWA support, error boundaries with throwOnError, and React 19 Suspense integration. Use when building data fetching, fixing migration errors, debugging hydration mismatches, implementing caching strategies, or configuring mutations.

Type-safe, file-based React routing with route loaders, search params validation, code splitting, preloading, navigation, route context, and TanStack Query integration. Use when setting up file-based routing, adding search params validation, implementing route loaders, code splitting routes, configuring virtual file routes, protecting routes with auth guards, or fixing type registration errors. Use for router setup, navigation patterns, URL state management, data loading.

Full-stack React framework built on TanStack Router. Type-safe routing, server functions, SSR/streaming, middleware, and multi-platform deployment. Use when building full-stack React apps with SSR, server functions, middleware, or authentication. Use for createServerFn, createMiddleware, beforeLoad, API routes, Cloudflare Workers, Vercel, Netlify deployment.

TanStack Store for framework-agnostic reactive state management with derived state and batching. Use when managing shared state, creating derived computations, or building framework-agnostic state logic. Use for tanstack-store, store, state, derived, batch, subscribe, reactive-state.

TanStack Table v8 headless data tables for React. Covers column definitions, sorting, filtering (fuzzy/faceted), server-side pagination with TanStack Query, infinite scroll, virtualization (TanStack Virtual), column/row pinning, row expanding/grouping, column resizing, and reusable Shadcn-styled components. Prevents 15 documented errors including infinite re-renders, React Compiler incompatibility, and server-side state mismatches. Use when building data tables, fixing table performance, implementing server-side pagination, adding filtering/sorting, or debugging table state issues.

TanStack Virtual for virtualizing large lists, grids, and tables. Use when rendering thousands of rows, implementing infinite scroll, or optimizing large data displays. Use for virtual, virtualize, virtual-list, virtual-scroll, useVirtualizer, infinite-scroll, windowing.

Tauri v2 framework for building desktop and mobile applications with web frontends and Rust backends. Covers project setup, IPC commands and events, window management, system tray, file system access, plugin system (clipboard, dialog, notification, updater, deep-link), multi-window apps, sidecar binaries, custom protocols, app signing, distribution, auto-updates, and the capability-based security model. Use when scaffolding a Tauri project, defining Rust commands, invoking backend logic from the frontend, configuring permissions and capabilities, setting up plugins, managing application state, building system tray menus, creating multi-window layouts, bundling sidecar binaries, implementing auto-updates, or signing apps for distribution.

Technical documentation writing and diagram generation. Use when creating docs, syncing documentation with code changes, building Mermaid diagrams, running doc coverage audits, or establishing writing style guides. Use for doc-as-code workflows, ERD generation, sequence diagrams, documentation gap analysis, and AI-assisted drafting.

Red-green-refactor discipline for writing code driven by tests. Covers the TDD cycle, test quality, mocking boundaries, and design for testability. Use when: implementing features, fixing bugs, refactoring existing code, designing module interfaces, or working within vertical slices from a tracer-bullets workflow.

Builds 3D web experiences with Three.js, WebGPU rendering, TSL shaders, and React Three Fiber. Covers scene setup, asset optimization, performance tuning, and React 19 integration. Use when creating 3D scenes, setting up WebGPU rendering, writing TSL shaders, optimizing draw calls, or integrating Three.js with React and Next.js.

Builds rich text editors with Tiptap, a headless ProseMirror-based editor framework for React with Tailwind v4 support. Covers SSR-safe setup, image uploads, prose styling, collaborative editing, and markdown support. Use when adding a rich text editor, configuring Tiptap extensions, handling image uploads in editors, or setting up collaborative editing with Y.js. Use for tiptap, rich text, editor, prosemirror, react, tailwind.

Concise summarization and information distillation. Covers executive summaries, code change summaries, PR descriptions, meeting notes, technical briefs, and progressive disclosure patterns. Use when writing PR descriptions, summarizing code changes, creating executive briefs, distilling long discussions, or generating release notes.

Builds multi-layer features as vertical end-to-end slices instead of horizontal layers. Each slice is verified before the next begins. Use when: starting any task that spans 2+ layers (DB, API, UI, tests), building CRUD features, implementing multi-step flows, decomposing features into subtasks, or planning implementation order.

Trekker CLI task tracking for AI coding agents. Covers epics, tasks, subtasks, dependencies, comments, full-text search, history audit log, and kanban-style workflow with local SQLite storage. Use when creating task trackers, managing agent work sessions, tracking epics and dependencies, or implementing local-first issue tracking with Trekker CLI.

tRPC v11 end-to-end type-safe APIs for TypeScript. Covers router and procedure definitions, input validation with Zod, middleware and context, subscriptions, error handling with TRPCError, React client hooks via @trpc/react-query, server-side callers with createCallerFactory, adapter setup (standalone, Express, Fastify, Hono), and testing patterns. Use when building tRPC routers, defining procedures, setting up middleware, configuring adapters, integrating tRPC with React, handling errors, implementing subscriptions, or testing tRPC procedures.

tsdown TypeScript bundler built on Rolldown for libraries and packages. Use when bundling TypeScript libraries, generating declaration files, or publishing npm packages. Use for tsdown, bundler, rolldown, dts, declaration, library-build, esm, cjs, treeshake.

Turborepo monorepo build system and orchestration. Covers task pipelines, dependsOn syntax, caching configuration, remote cache, filtering, CI optimization, environment variables, workspace management, watch mode, package boundaries, and code generation. Use when configuring tasks, creating packages, setting up monorepo, sharing code between apps, running changed packages, debugging cache, optimizing CI, resolving workspace dependencies, enforcing package boundaries, or generating code.

Turso edge-hosted SQLite platform built on libSQL (open-source SQLite fork). Covers @libsql/client SDK, embedded replicas with local sync, multi-database per-tenant architecture, platform API for database provisioning, schema migrations, vector search with F32_BLOB, batch operations, interactive transactions, and encryption at rest. Use when connecting to Turso databases, configuring embedded replicas, provisioning databases via the platform API, implementing per-tenant database isolation, performing vector similarity search, or integrating libSQL with Drizzle ORM.

Advanced TypeScript patterns for strict mode development. Covers type utilities (Pick, Omit, Partial, Record, Awaited), generics with constraints and inference, type guards and narrowing, discriminated unions, conditional and mapped types, template literal types, const assertions, satisfies operator, module patterns, and modern JavaScript idioms (eslint-plugin-unicorn). Use when building type-safe APIs, preventing runtime errors through types, working with strict TypeScript configuration, debugging complex type errors, or enforcing modern JS idioms. Use for generics, type guards, utility types, strict mode, type inference, narrowing, type safety, const assertions, satisfies, module augmentation, unicorn, for-of, modern-js.

Iterative UI/UX polishing workflow for web applications. Use when improving visual polish, refining desktop and mobile UX separately, running iterative enhancement cycles, applying design patterns like glassmorphism or bento grids, or auditing accessibility and WCAG compliance. Use for Stripe-level visual quality, responsive optimization, and design system alignment.

Conduct usability tests and identify UX issues through systematic observation. Use when testing user flows, validating designs, identifying friction points, running heuristic evaluations, or ensuring users can complete core tasks. Use for test planning, think-aloud protocol, task scenarios, severity rating, accessibility evaluation.

Designs user experiences and interfaces grounded in research. Use when creating user journeys, wireframes, prototypes, or improving usability. Use for information architecture, interaction design, accessibility audits, design system creation, and developer handoff.

Valkey (Redis-compatible) in-memory data store for caching, session storage, pub/sub, queues, and distributed locks. Use when configuring Valkey or Redis-compatible caching, choosing eviction policies, implementing rate limiting, setting up pub/sub or streams, writing Docker Compose services, migrating from Redis, or tuning performance. Use for valkey, redis, cache, session, pub/sub, streams, distributed-lock, rate-limit, sorted-set.

Vercel deployment configuration, preview environments, and edge functions. Covers vercel.json and vercel.ts configuration, rewrites, redirects, headers, environment variables across production/preview/development, custom domains, DNS setup, edge and serverless functions, Vercel CLI, GitHub Actions CI/CD, and monorepo deployments. Use when deploying to Vercel, configuring builds, setting up preview branches, managing environment variables, configuring custom domains, or using edge/serverless functions. Use for vercel, deploy, preview, edge-function, serverless, vercel-json, environment-variables, domains, monorepo.

Vite build tool configuration and ecosystem. Covers vite.config.ts setup, plugin authoring and popular plugins, dev server configuration (proxy, HMR, HTTPS), build optimization (chunking, tree-shaking, manual chunks, rollupOptions), library mode for publishing packages, SSR configuration, environment variables (.env handling), multi-page apps, CSS handling (PostCSS, CSS modules, preprocessors), and asset handling. Use when configuring Vite projects, authoring Vite plugins, optimizing builds, setting up dev server proxies, configuring SSR, handling environment variables, or troubleshooting Vite issues.

Vitest testing framework for unit, component, and integration tests. Covers test structure (describe/it/test.each), assertions with expect, lifecycle hooks, mocking (vi.fn/vi.mock/vi.spyOn), React Testing Library patterns, hook testing with renderHook, user-event interactions, async utilities, configuration, workspace setup, coverage, and advanced patterns like in-source testing and concurrent execution. Also covers CLI commands, test filtering, tags, sharding, fixtures with test.extend, and fixture scoping. Use when writing unit tests, component tests, integration tests, or testing React hooks. Use for test configuration, mocking modules, testing async behavior, snapshot testing, or setting up test coverage.

Zod v4 schema validation for TypeScript. Covers primitives, string formats, objects, arrays, unions, coercion, transforms, refinements, parsing, type inference, error customization, JSON Schema, file validation, and metadata. Use when writing schemas, validating input, parsing data, inferring types, or converting schemas with Zod.

Zustand v5 state management for React. Covers TypeScript stores with double-parentheses syntax, persist middleware with hydration handling, devtools, subscribeWithSelector, slices pattern for large apps, SSR/Next.js provider pattern, immer middleware, auto-generating selectors, testing, and vanilla stores. Use when setting up global state, configuring persist middleware, implementing slices pattern, migrating from Redux or Context, testing stores, or troubleshooting hydration and TypeScript issues.