Skills
99,448 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
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.
Pre-consultation diagnostic questionnaire for clients building websites with AI tools (Claude, Codex, Cursor, Bolt, v0, etc.) who have concerns about quality, design, or maintainability. Collects structured answers about their project, tools, pain points, and goals, then generates a consultation brief. Use when preparing for a website review consultation, when a client asks for a site audit, or when someone says their AI-built site has problems. Supports Russian and English — asks the client to choose language first.
Extracts exact, behaviour-first specifications from an existing codebase. Defines domain concepts, use cases, and business rules with precision — zero implementation details. Use when reverse-engineering a legacy project into precise specs or preparing an AI-friendly spec set for a rewrite.
Draw how any system moves between states, such as a product flow, a protocol, or a service, as a Mermaid statechart from a TLA+ model. Each bug is a numbered path with blue borders to a state that breaks a rule. Use for /statechart, to show a bug as a path through states, or to turn an agreed chart into a TLA+ skeleton.
Make a repository Superset-ready — author .superset/config.json with setup/teardown/run scripts so every new workspace boots configured, then verify with a real workspace. Use when the user wants to set up a project or repo for Superset, configure workspace setup scripts, or fix a failing workspace setup.
Project onboarding and session entry point for swain. On first run, performs full onboarding: migrates CLAUDE.md to AGENTS.md, verifies vendored tk, configures pre-commit security hooks, and offers swain governance rules — then writes a .swain/init.json marker. On subsequent runs, detects the marker and runs the per-session fast path (greeting, focus lane, session state). Use as a single entry point — it routes automatically. Triggers also on: 'session', 'session info', 'focus on', 'tab name'.
Use this skill when reviewing Swift code for runtime-level performance costs, including heap allocation, ARC traffic, stack vs heap storage, closure capture contexts, method dispatch, protocol witness dispatch, existentials vs generics, opaque types, copy-on-write, SIL optimizer output, unsafe memory boundaries, or module-boundary optimizer visibility. Do not use it for Swift Concurrency scheduling, SwiftUI rendering, app launch, or profiling workflows unless the question is specifically about Swift runtime costs.
Use this skill when a user asks how to generate, integrate, or implement a Word‑like document editor in Angular using Syncfusion. Trigger it for requests involving the Syncfusion Angular Document Editor, Angular‑based editor integration, document editing and formatting, comments and track changes, working with tables and images, managing headers and footers, applying document protection, and building end‑to‑end document workflows in Angular applications.
**CONFIGURATION GUIDE** — Assist with Syncfusion ASP.NET Core EJ2 components setup, localization, and version compatibility. Use when: installing Syncfusion packages, configuring globalization/localization, selecting compatible versions.
**LICENSE REGISTRATION GUIDE** — Assist with Syncfusion ASP.NET Core EJ2 license key generation, registration, troubleshooting, and error resolution. Use when: registering license keys, handling licensing errors, upgrading from trial to paid, generating version-specific keys, or handling platform-specific licensing.
Create, edit, and convert Word documents (.docx) using Syncfusion DocIO. Supports to generate java code for the user's project. Use when the user mentions docx, Word processing, document generation, Syncfusion DocIO, or syncfusion java word.
Tailwind CSS v4 usage guide and v3-to-v4 differences. This skill should be used when writing, reviewing, or refactoring any Tailwind CSS code in this repo. Triggers on tasks involving Tailwind classes, @theme blocks, CSS-first configuration, or cleanup of v3-era syntax.
Universal React UI framework for web and native (v1.144.0+). Use when building cross-platform apps with React Native + Web, creating styled components with `styled()`, configuring design tokens/themes, using Tamagui UI components (Button, Dialog, Sheet, Input, Select, Tabs, etc.), working with animations, or needing Bento/Takeout premium components. Triggers: "tamagui", "universal UI", "react native web", "styled()", "design tokens", "$token", "XStack/YStack/ZStack", "useTheme", "useMedia", "@tamagui/*" imports, "bento", "takeout", "one.js router", "createStyledContext", "withStaticProperties", "@tanstack/react-table", "zero sync", "better auth".
Implement a production GTAO path in Three.js. Use for half-resolution horizon sampling, reversed-depth reconstruction, bent-normal encoding, full-resolution bilateral reconstruction, environment-light application, contact grounding, and halo diagnosis.
A comprehensive skill for the uni-app plugin market and automatic plugin installation. Use this skill to browse plugins, auto-install plugins, configure plugin settings, and integrate third-party plugins based on the official plugin market docs.
Use when building with the yahoo-finance2 TypeScript/Deno/npm library, using its Yahoo Finance data modules, CLI, or MCP server, or contributing to the yahoo-finance2 repository including modules, validation schemas, cached fixtures, and npm/JSR build output.
A deep dive into how yak scripts interact with the Yakit UI. Explains how yakit.* library functions drive interface rendering through the gRPC ExecResult stream: yakit.Info/Warn/Error/Success log output, yakit.SetProgress progress bars, yakit.NewTable/EnableTable/TableData tables (static vs dynamic), yakit.NewLineGraph/NewBarGraph/NewPieGraph/NewWordCloud charts, yakit.StatusCard status cards, yakit.EnableWebsiteTrees website trees, yakit.EnableText/TextTabData text tabs, the unified yakit.Output channel, and the full path from the frontend consuming ExecResult via useHoldGRPCStream to rendering the UI. Use when the user asks "how do I make Yakit show a table/chart/progress bar/card from a script" or "where does yakit.Info output go".
Build AI agents and automate Claude Code programmatically via the Claude Agent SDK and headless CLI mode. Covers Python SDK, claude -p, SDK MCP servers, hooks, sessions. Triggers on: "build an agent", "agent SDK", "headless mode", "automate Claude", "programmatic agent".
Expert in building comprehensive AI systems, integrating LLMs, RAG architectures, and autonomous agents into production applications. Use when building AI-powered features, implementing LLM integrations, designing RAG pipelines, or deploying AI systems.
Use when authoring a data model document — the persistence/domain model of stored data: typed entities, relationships + cardinality, keys/constraints, indexes, normalization, the storage choice, and lifecycle. Guides the producer through the METHOD, not the outline: deriving entities from the feature-spec's nouns + access patterns, detecting the paradigm and modeling in it (relational, document/NoSQL access-pattern-first, graph, wide-column, key-value), making integrity rules explicit (keys, constraints, cardinality + referential rule), justifying each index by an access pattern, and amending an approved model as a versioned, migration-planned delta — so an engineer can build + query the schema. Composes with a data-model template tool + a deep-research capability. Assumes the upstream feature-spec (+ architecture-doc) — never a blank page. Not the API wire contract (the api-spec references these entities downstream, one-directional), not the implementation/DDL, and not reviewing a finished data model.
Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes. Use when the user is writing, reviewing, or refactoring server-side code: API endpoints/routes, controllers, services, middleware, database access, or backend architecture. Server-side scope only — for React/Next client-side components use react-best-practices; for cross-cutting TS/JS standards use coding-standards.
Generate, modify, and explain Cerbos authorization policies — resource and role policies, derived roles, exported variables, CEL conditions, and `*_test.yaml` suites. Use when writing access control rules from requirements or a spec document (including PDFs), changing what an existing policy allows, when a Cerbos policy fails to compile or a policy test fails, or when policies need to reach a PDP through a Cerbos Hub policy store. Not for standing Hub up itself (`cerbos-hub-setup`), nor for extracting rules out of an existing system (`cerbos-authz-migration`).
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.
Detects code smells and anti-patterns — long methods, large classes, feature envy, data clumps, primitive obsession, dead code, magic numbers, deep nesting, and more. Uses configurable thresholds from .codeprobe-config.json when available. Trigger phrases: "code smells", "smell check", "anti-patterns", "clean code review".
Core engineering discipline for code work — keeps changes simple, scoped, maintainable, well-structured, and verified. Use before any task to write, implement, add, build, create, change, fix, debug, refactor, optimize, review, test, or organize code, scripts, configs, APIs, modules, boundaries, or file layout in any language. Load this skill first, then do the task. Skip only for trivial formatting, pure prose edits, or explicitly throwaway prototypes.
Format commit messages, branch names, PR titles, and issue titles to the Conventional Commits 1.0.0 spec. Use BEFORE running `git commit`, `git checkout -b`/`git branch`, `gh pr create`, or `gh issue create`; before writing any commit message, branch name, PR title, or issue title; and whenever staging changes to commit or asked to \"commit\", \"make a PR\", \"open an issue\", or \"create a branch\" — or when another skill needs a spec-compliant commit message.
Given a freshly-cloned external repo/tool, run clone→explore→verify→write to produce a bundle of RUNNABLE workflow skills under .overstack/doyourmagic/<repo>/skills/ — one hub skill /dym-<repo> (1 dòng context, chỉ nạp workflow con khi được gọi) + N sub-skills dạng SKILL.md promote thẳng lên repo chính (npx skills add) — plus workflows.md (index + bảng kiểm chứng) and flow.html (docs-site-macos, sơ đồ luồng skill→sản phẩm→skill kế). Trigger on 'kéo repo mới về', 'clone tool này làm workflow', 'doyourmagic', 'onboard external tool/repo', 'generate workflow docs/skills for this repo', or /doyourmagic. Options: --name <prefix> · --humanize.
Provides comprehensive guidance for Element Plus Vue 3 component library including installation, components, themes, internationalization, and API reference. Use when the user asks about Element Plus for Vue 3, needs to build Vue 3 applications with Element Plus, or customize component styles.
Event modeling facilitation for discovering and designing event-sourced systems using a structured 9-step workflow. Use when modeling domain workflows, designing event-sourced systems, writing Given/When/Then scenarios for commands or views, validating event models, or discussing event sourcing and domain-driven design. Triggers on: "model this workflow", "event model", "event sourcing", "what events do we need", "write GWT scenarios", "Given/When/Then", "validate the event model", "decompose into slices", "map this domain", "brainstorm events". Also activates for discovering domain actors, identifying automations, mapping integrations, or decomposing workflows into vertical slices. NOT for: implementing event store infrastructure, choosing databases, or writing application code.
Build a private reserve auction dApp on Midnight Network — hidden reserve price, public bids, private bidder identities. Covers private-reserve-auction.compact (no witnesses, persistentCommit, Map, Counter, disclose, receiveUnshielded/sendUnshielded), Next.js frontend, 1AM wallet integration, low-level deploy/call, indexer polling. Use for teaching privacy boundaries, commitment-based auctions, seller access control, or unshielded settlement. Triggers: private auction, reserve auction, silent auction, privacy boundary, persistentCommit, getDappPublicKey, unshielded claim, hidden price, bid commitment, seller reveal. Also use when extending locker-dapp or payment-dapp wallet/provider patterns to privacy-preserving auction flows.
Design how one feature or screen in an iOS app behaves while it works: loading, showing saved data while refreshing, success, empty, error and retry, with the motion, haptics and words for each state, backed by real shipped apps. Use when asked to add or improve loading states, success or error feedback, empty states, retry flows, or "what should happen while this loads". SwiftUI and UIKit, iOS only.
Complete knowledge domain for Firecrawl v2 API - web scraping and crawling that converts websites into LLM-ready markdown or structured data. Use when: scraping websites, crawling entire sites, extracting web content, converting HTML to markdown, building web scrapers, handling dynamic JavaScript content, bypassing anti-bot protection, extracting structured data from web pages, or when encountering "content not loading", "JavaScript rendering issues", or "blocked by bot detection". Keywords: firecrawl, firecrawl api, web scraping, web crawler, scrape website, crawl website, extract content, html to markdown, site crawler, content extraction, web automation, firecrawl-py, firecrawl-js, llm ready data, structured data extraction, bot bypass, javascript rendering, scraping api, crawling api, map urls, batch scraping
Provides domain knowledge and guidance for the Flare Data Connector (FDC)—attestation types, request flow, Merkle proofs, verifier/DA Layer, and smart contract integration. Use when working with FDC, cross-chain attestations, EVMTransaction, Web2Json, Payment, AddressValidity, XRPPayment, XRPPaymentNonexistence, proof-of-reserves, weather insurance, or Flare Developer Hub FDC guides and starter repos.
Build or audit Flutter accessibility for semantics, screen readers, focus, keyboard access, text scaling, contrast, target size, and motion preferences. Pair with flutter-responsive-layout when large text causes reflow, clipping, or overflow across constraints.
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.