Use when a builder needs to build or extend a React or TypeScript frontend for a standard Gear/Vara Sails app, using Sails-JS, generated clients, React hooks, and low-level Gear-JS only where it adds value. Do not use for Rust-only contract work, raw gstd service design, or non-Vara frontends.

View and manage Feature-flow settings — YOLO stops, notifications, branches, design preferences, standards, and more. Use when the user asks to "configure", "change settings", "update config", or "/settings".

Provides complete shadcn/ui component library patterns including installation, configuration, and implementation of accessible React components. Use when setting up shadcn/ui, installing components, building forms with React Hook Form and Zod, customizing themes with Tailwind CSS, or implementing UI patterns like buttons, dialogs, dropdowns, tables, and complex form layouts.

Guide for creating effective skills that extend Claude's capabilities. Use when users want to create a new skill, update an existing skill, or need guidance on skill structure and best practices. Triggers: 'create skill', 'new skill', 'skill template', 'build skill', 'skill structure', 'skill design'.

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, update or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or iterate on skill quality. Triggers: "create a skill", "make a new skill", "build a skill for", "write a skill that", "skill for doing X", "I want a skill to", "new skill", "design a skill", "scaffold a skill", "improve this skill", "optimize this skill", "this skill isn't working well", "evaluate this skill", "score this skill", "how good is this skill", "run evals on", "benchmark this skill", "test this skill's quality", "skill quality", "skill performance". Also triggers when a user describes a repeatable workflow they want to automate, says "I keep doing X manually", "can you remember how to do X", or "turn this into a skill".

Proactively apply when generating Slack API payloads with blocks, chat.postMessage calls with structured content, streaming AI responses, or views.open/views.publish calls. Triggers on Block Kit, Slack blocks, section block, actions block, header block, divider block, context block, alert block, card block, carousel block, table block, markdown block, rich text block, image block, input block, video block, context_actions block, plan block, task_card block, chat.startStream, chat.appendStream, chat.stopStream, Slack modal, Slack App Home, Slack surfaces, Slack interactive elements, Slack button, Slack select menu, Slack overflow, Slack datepicker, Slack checkboxes, Slack radio buttons, Work Objects, Slack link unfurl, chat.postMessage blocks, views.open, views.update, views.push, views.publish, Slack composition objects. Use when building Block Kit payloads, constructing blocks arrays, creating modals or App Home views, adding interactive elements, implementing link unfurling with Work Objects, streaming agent output, or designing rich message layouts. Slack Block Kit UI framework for building rich message layouts, modals, App Home views, and AI agent responses.

Conducts a focused review from ONE specific specialist's perspective (e.g., Security Specialist, Performance Expert). Use when the user requests "Ask [specialist role] to review [target]", "Get [specialist]'s opinion on [topic]", "Have [role] review [code/component]", or when they want deep expertise in ONE specific domain. Do NOT use for comprehensive multi-perspective reviews (use architecture-review instead) or for listing available specialists (use list-members instead).

Spring Boot 4 data layer implementation for Domain-Driven Design. Use when implementing JPA or JDBC aggregates, Spring Data repositories, transactional services, projections, or entity auditing. Covers aggregate roots with AbstractAggregateRoot, value object mapping, EntityGraph for N+1 prevention, and Spring Boot 4 specifics (JSpecify null-safety, AOT repositories). For DDD concepts and design decisions, see the domain-driven-design skill.

Spring Modulith 2.0 implementation for bounded contexts in Spring Boot 4. Use when structuring application modules, implementing @ApplicationModuleListener for event-driven communication, testing with Scenario API, enforcing module boundaries, externalizing events to Kafka/AMQP, building a modular monolith, defining module dependencies, managing inter-module events, or organizing DDD modules as packages. Covers package-based module boundaries, named interfaces, event publication, and Scenario API testing. For architecture decisions, see domain-driven-design skill.

Optimizes SQL queries, designs database schemas, and troubleshoots performance issues. Use when a user asks why their query is slow, needs help writing complex joins or aggregations, mentions database performance issues, or wants to design or migrate a schema. Invoke for complex queries, window functions, CTEs, indexing strategies, query plan analysis, covering index creation, recursive queries, EXPLAIN/ANALYZE interpretation, before/after query benchmarking, or migrating queries between database dialects (PostgreSQL, MySQL, SQL Server, Oracle).

SwiftUI implementation patterns for building polished iOS/macOS apps. Use when building views, managing state, creating layouts, implementing animations, or structuring app architecture in SwiftUI.

Implement Syncfusion Angular Bullet Chart component for performance comparison visualizations. Use this when displaying actual vs target values, defining quality ranges, customizing axes and labels, or creating accessible performance indicators. Covers getting started, data binding, axes configuration, visual elements, and customization.

Implement Syncfusion Angular Circular Gauge component for radial data visualization. Use this when building circular gauges for dashboards, monitoring displays, performance metrics, speedometers, or KPI indicators. Covers installation, axes configuration, pointer types (needle, range bar, marker), ranges, styling, animations, and user interactions.

Build flexible card layouts for displaying content in React. The Card component is a lightweight container that supports headers, images, action buttons, horizontal layouts, and integration with other Syncfusion components. Use this skill whenever the user needs to create cards, build card-based UIs, display content cards, add action buttons to cards, customize card layouts, or embed components within cards.

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.

Guideline for designing, implementing, and verifying secure TypeScript and JavaScript applications following OWASP Top 10 best practices. Use when the user wants to: (1) review TypeScript or JavaScript code for security vulnerabilities, (2) design a secure Node.js, Deno, or browser application architecture, (3) implement security features (authentication, authorization, cryptography, input validation), (4) audit npm/yarn/pnpm dependencies for known vulnerabilities, (5) create security checklists or verification plans, (6) fix security bugs or harden existing TypeScript or JavaScript code, (7) set up security testing and static analysis (ESLint security plugins, Semgrep, Snyk), or (8) handle any TypeScript/JavaScript security concern including injection prevention, prototype pollution, XSS protection, SSRF prevention, secrets management, and secure deployment.

Upgrades an existing assistant-ui project to current releases and executes the resulting migrations. Use when the user wants to update, upgrade, bump, or migrate @assistant-ui/react, @assistant-ui/react-ai-sdk, ai, or @ai-sdk/react, hits peer-dependency conflicts or post-upgrade type errors, or must apply renamed APIs after a version jump. Detects installed versus latest versions via npm ls / npm view, then routes through breaking-change references for each jump (AI SDK v4/v5 to v6; assistant-ui 0.8.x to 0.14.x): useAssistantApi to useAui, runtime.threadList to runtime.threads, ThreadPrimitive.ViewportSlack removal, the primitives components prop to children render functions, toDataStreamResponse to toUIMessageStreamResponse, maxSteps to stopWhen: stepCountIs(n). Runs npx assistant-ui@latest upgrade, pnpm/npm add @latest, and npx tsc --noEmit to verify. For a first-time install or fresh scaffold (not an upgrade) use setup instead.

Usability testing methodology, Nielsen's heuristics, and usability metrics. Use when planning usability tests, evaluating UI against heuristics, writing test scripts, or measuring task success rates. Trigger on: 'run a usability test', 'heuristic evaluation', 'usability test script', 'task success rate', 'think-aloud protocol'.

Guide for implementing smooth, native-feeling animations using React's View Transition API (`<ViewTransition>` component, `addTransitionType`, and CSS view transition pseudo-elements). Use this skill whenever the user wants to add page transitions, animate route changes, create shared element animations, animate enter/exit of components, animate list reorder, implement directional (forward/back) navigation animations, or integrate view transitions in Next.js. Also use when the user mentions view transitions, `startViewTransition`, `ViewTransition`, transition types, or asks about animating between UI states in React without third-party animation libraries.

Vue Router 4 patterns, navigation guards, route params, and route-component lifecycle interactions.

Vue Router 4 patterns, navigation guards, route params, and route-component lifecycle interactions.

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Headless browser automation via agent-browser — Rust CLI daemon with persistent auth profiles for fast, scriptable, parallel browser work. Supports batch commands, network interception, device emulation, per-site profile auth (one-time headed login, headless forever after), and parallel isolated sessions via --session. Workflows: ReviewStories (fan out YAML user stories to parallel UIReviewers), Automate (load/run parameterized recipe templates), Update. Delegates to general-purpose agents with agent-browser instructions for background parallel scraping. Falls back to Interceptor if site has bot detection. USE WHEN headless browser, batch scrape, fast screenshot, dev server test, parallel browser, background automation, extract data, review stories, automate recipe, batch screenshots, scrape multiple pages in parallel. NOT FOR deploy verification or UI confirmation with real Chrome (use Interceptor). NOT FOR simple single-URL fetching (use WebFetch). NOT FOR CAPTCHA or bot-detection bypass (use BrightData or Interceptor).

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.

Master backend development with Node.js, Python, Java, Go, Rust, API design, databases, and microservices. Use when building APIs, designing systems, or learning backend frameworks.

Google quantum computing framework. Use when targeting Google Quantum AI hardware, designing noise-aware circuits, or running quantum characterization experiments. Best for Google hardware, noise modeling, and low-level circuit design. For IBM hardware use qiskit; for quantum ML with autodiff use pennylane; for physics simulations use qutip.

Use when improving CLI ergonomics for agents: flags, help, JSON output, exit codes, and robot surfaces. Triggers:

Create a new ASP.NET Core web application or web site using Blazor. USE FOR: creating a new Blazor web app, scaffolding a new web project, starting a new web site, choosing render modes (Static SSR, Interactive Server, Interactive WebAssembly, Auto), running dotnet new blazor with the right options, setting up initial project structure. DO NOT USE FOR: adding features to existing projects, changing how an existing app renders, or component authoring (use author-component).

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.

Phase 5: Verify contrast >= 4.5:1 text / 3:1 UI in both light+dark, check no Inter/Roboto/Arial/Open Sans, confirm all colors are OKLCH from design-system.md, validate hover/focus/disabled/loading states, run anti-AI-slop checklist.

Psychological profiling through natural conversation using narrative identity research (McAdams), self-defining memory elicitation (Singer), and Motivational Interviewing (OARS framework). Use when you need to: (1) understand someone's core values and motivations, (2) discover formative memories and life-defining experiences, (3) detect emotional schemas and belief patterns, (4) build psychological profiles through gradual disclosure, (5) conduct user interviews that reveal deep insights, (6) design conversational flows for personal discovery, (7) identify identity themes like redemption and contamination narratives, (8) elicit authentic self-disclosure without interrogation.

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.

Master Flutter app architecture patterns including MVVM, Clean Architecture, dependency injection, and design patterns for building scalable and maintainable applications. Use when designing app structure, implementing architecture patterns, or organizing code for large-scale projects.

This skill should be used when generating React forms with React Hook Form, Zod validation, and shadcn/ui components. Applies when creating entity forms, character editors, location forms, data entry forms, or any form requiring client and server validation. Trigger terms include create form, generate form, build form, React Hook Form, RHF, Zod validation, form component, entity form, character form, data entry, form schema.

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.

Expert frontend development guidance covering React, Vue, Angular, TypeScript, state management, component architecture, performance optimization, accessibility, testing, and modern web APIs. Produces production-ready, maintainable, and performant frontend code with best practices. Use when building web applications, implementing UI components, managing application state, optimizing performance, or when users mention React, Vue, Angular, TypeScript, hooks, state management, components, or frontend development.

Comprehensive GitHub issue lifecycle management from creation through resolution. Use when creating/viewing/editing/managing GitHub issues, writing issue descriptions, creating sub-issues, linking parent/child issues, dumping issue trees to markdown, or pushing issues from files. Covers the full issue lifecycle - creating issues with conventional commit titles, managing sub-issues and cross-repo references, editing issue content, viewing and listing issues, dumping issue trees with YAML frontmatter, round-trip workflows (dump→edit→push), linking issues, commenting, labeling, and closing. Supports meta-tickets, component issues, and cross-repo sub-issue tracking.

Expert blueprint for inventory systems (Diablo, Resident Evil, Minecraft) covering slot-based containers, stacking logic, weight limits, equipment systems, and drag-drop UI. Use when building RPG inventories, survival item management, or loot systems. Keywords inventory, slot, stack, equipment, crafting, item, Resource, drag-drop.

Expert blueprint for mobile platforms (Android/iOS) covering touch controls, virtual joysticks, responsive UI, safe areas (notches), battery optimization, and app store guidelines. Use when targeting mobile releases or implementing touch input. Keywords mobile, Android, iOS, touch, InputEventScreenTouch, virtual joystick, safe area, battery, app store, orientation.

Comprehensive Google Tag Manager guide covering container setup, tags, triggers, variables, data layer, debugging, custom templates, and API automation. Use when working with GTM implementation, configuration, dataLayer push design, custom tag/template building, server-side container setup, GTM API automation, optimisation, or troubleshooting. Do NOT use for direct gtag.js/GA4 setup that bypasses GTM (use the google-analytics skill), Adobe Launch, Tealium, or other non-GTM tag management systems.

Configure Tailwind CSS v4 for Hebrew RTL applications with dir variants, Hebrew font stacks, and logical property utilities. Use when user asks about Tailwind RTL setup, Hebrew Tailwind config, "Tailwind ivrit" (Hebrew Tailwind), RTL utility classes, logical properties in Tailwind, ms-/me- utilities, or Tailwind Hebrew font configuration. Covers Tailwind v4 dir variants, Hebrew font stack presets, logical property utilities (ms-/me-/ps-/pe- instead of ml-/mr-/pl-/pr-), RTL-first component patterns, and Hebrew typography tokens. Do NOT use for general CSS RTL patterns (use hebrew-rtl-best-practices) or full design systems (use israeli-ui-design-system instead).

Master iOS testing - XCTest, UI testing, mocking, debugging, performance

Provides idiomatic Kotlin implementation patterns including coroutine concurrency, Flow stream handling, multiplatform architecture, Compose UI construction, Ktor server setup, and type-safe DSL design. Use when building Kotlin applications requiring coroutines, multiplatform development, or Android with Compose. Invoke for Flow API, KMP projects, Ktor servers, DSL design, sealed classes, suspend function, Android Kotlin, Kotlin Multiplatform.

Apply DESIGN, canon, and modules to every page in the inventory, producing a deployable static HTML site. Three render branches (approved page, template-applied sibling, unique render). Per-page, incremental, idempotent, content-preserving by default.

Search Mouser Electronics for electronic components — secondary source for prototype orders. Find parts, check pricing/stock, download datasheets, analyze specifications. Use with KiCad for BOM creation and part selection. Also supports batch MPN-list seeding (`--mpn-list`) for bulk datasheet workflows without a KiCad project. Use this skill when the user specifically mentions Mouser, when DigiKey is out of stock or has worse pricing, when comparing prices across distributors, or when searching for parts that DigiKey doesn't carry. For package cross-reference tables and BOM workflow, see the `bom` skill.

Ingests unstructured and semi-structured documents into Neo4j as a knowledge graph. Use when chunking PDFs, HTML, plain text, or Markdown; extracting entities and relationships from text with an LLM (SimpleKGPipeline, neo4j-graphrag); loading JSON via apoc.load.json; building Document→Chunk→Entity graph structures; or connecting LangChain/LlamaIndex document loaders to Neo4j. Covers neo4j-graphrag SimpleKGPipeline, LLM Graph Builder web UI, entity resolution, chunking strategies, and graph schema design for RAG pipelines. Does NOT handle structured CSV/relational import — use neo4j-import-skill. Does NOT handle GraphRAG retrieval after ingestion — use neo4j-graphrag-skill. Does NOT handle vector index creation — use neo4j-vector-search-skill.

Design and implement Internal Developer Platforms (IDPs) with self-service capabilities, golden paths, and developer experience optimization. Covers platform strategy, IDP architecture (Backstage, Port), infrastructure orchestration (Crossplane), GitOps (Argo CD), and adoption patterns. Use when building developer platforms, improving DevEx, or establishing platform teams.

Automates design review, token extraction, component mapping, and implementation planning. Reduces design handoff from 6-10 hours to 5 minutes via direct Figma MCP integration. Auto-invoke when user mentions design review, Figma mockup, or design handoff.

Advanced React patterns and conventions for data fetching, tables, forms, state machines, client state management, schema validation, and testing. Use when tackling complex React problems — not simple component questions, but multi-concern tasks like server-driven tables with filtering, multi-step wizards, eliminating useEffect, Suspense architecture, choosing between state management approaches, or designing data flow across server/client/URL/form state. Do not use for web-specific routing/SSR or React Native-specific navigation/performance.

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture. Includes React 19 API changes. Do NOT use for React/Next.js performance optimization (use react-best-practices instead).

Use when building HTML email templates with React components, adding a visual email editor to an application using the React Email visual editor, rendering emails to HTML, or sending emails with Resend. Covers welcome emails, password resets, notifications, order confirmations, newsletters, transactional emails, and the embeddable email editor component.

React Native and Expo best practices for performance, UI patterns, and native integrations.

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 Testing Library: user-centric component testing with queries, user-event simulation, async utilities, and accessibility-first API. Use when writing React component tests, selecting elements by role/label/text, simulating user events, or testing async UI behavior. Keywords: React Testing Library, @testing-library/react, user-event, queries, render.

Evaluate scientific claims and evidence quality. Use for assessing experimental design validity, identifying biases and confounders, applying evidence grading frameworks (GRADE, Cochrane Risk of Bias), or teaching critical analysis. Best for understanding evidence quality, identifying flaws. For formal peer review writing use peer-review.

Generates Spring Boot 3.x configurations, creates REST controllers, implements Spring Security 6 authentication flows, sets up Spring Data JPA repositories, and configures reactive WebFlux endpoints. Use when building Spring Boot 3.x applications, microservices, or reactive Java applications; invoke for Spring Data JPA, Spring Security 6, WebFlux, Spring Cloud integration, Java REST API design, or Microservices Java architecture.

Streaming backends and wire protocols for assistant-ui via the assistant-stream package. Use when building a custom (non-AI-SDK) streaming endpoint with createAssistantStreamResponse or createAssistantStreamController, emitting parts through appendText/appendReasoning/appendSource/appendFile/addToolCallPart and setResponse; choosing between the AI SDK Data Stream format (toUIMessageStreamResponse) and the native Assistant Transport format; encoding or decoding streams with DataStreamEncoder/DataStreamDecoder, AssistantTransportEncoder/AssistantTransportDecoder, PlainTextEncoder, or UIMessageStreamDecoder; or wiring streamed chunks into useLocalRuntime or useChatRuntime. Use specifically for debugging stream wire issues: text-delta, part-start, result events, text/event-stream content-type, SSE format, tool calls not rendering, or partial text not showing. For general non-stream debugging route to the relevant focused skill, not the parent overview.

Implement Syncfusion Angular ContextMenu component for right-click and touch-hold menus. Use this skill when user needs to create context menus, add/remove/enable menu items, handle menu clicks, customize animations, apply templates, handle data binding, trigger dialogs from menu items, show/hide items dynamically, add icons, create scrollable menus, or customize menu appearance.

Implement navigation menus using Syncfusion Blazor Menu Bar component. Use this skill to create horizontal or vertical menus with submenus, icons, events, animations, and data binding. Essential for building professional menu bars in Blazor applications.

Implement Syncfusion Blazor Toolbar (SfToolbar) component for creating interactive command bars and toolbars. Use this when working with toolbars, command bars, or action bars with buttons and icons. This skill covers responsive toolbars with overflow handling, item configuration and alignment, keyboard navigation, accessibility features, and dynamic item management.

Create responsive navigation headers with AppBar component. Build top, bottom, or sticky app bars with buttons, menus, icons, and sidebars. Use when building navigation elements, toolbars, action bars, or responsive headers with dynamic content layout. Includes color modes (Light, Dark, Primary, Inherit), size modes (Regular, Prominent, Dense), spacing, separators, and full accessibility support.

Generate, customize, and export barcodes in React using Syncfusion BarcodeGenerator. Trigger for requests involving Code39 or Code128 barcodes, QR codes, Data Matrix generation, barcode styling (size, color, text, margins), React component setup, props or events, SVG or canvas rendering, and exporting or printing barcode images.

Implement and configure Syncfusion React Breadcrumb component for navigation paths, routing, and site hierarchy. Use this skill whenever users need breadcrumb navigation, want to create hierarchical navigation paths, display location breadcrumbs, handle navigation between pages, customize overflow behaviors, or integrate breadcrumbs with routing libraries.

System design, software architecture, API design, cybersecurity, and threat modeling. Build secure, scalable systems.

Tailwind CSS v4 utility-first discipline: CSS-first configuration, design tokens via @theme, and principled class composition. Invoke whenever task involves any interaction with Tailwind CSS — writing, reviewing, refactoring, debugging, or understanding utility classes, theme configuration, custom utilities, dark mode, or Tailwind integration with frameworks.

Creates, reviews, and debugs UI motion and animation implementations. Covers springs, gestures, drag interactions, clip-path reveals, easing, timing, CSS transition recipes, and animation review. Use when designing, implementing, or reviewing motion, CSS transitions, keyframes, framer-motion, spring animations, asking "add animations to", "make this feel smooth", "review my animations", "should this animate", "add a swipe gesture", or "add a transition"

Provides practical UI design patterns for hierarchy, spacing, typography, color, depth, imagery, UI copy, forms, navigation, tables, empty states, loading states, accessibility, and responsive behavior. Use when designing, reviewing, polishing, or refactoring web interfaces, layouts, components, dashboards, forms, or visual systems.

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture. Includes React 19 API changes.

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture. Includes React 19 API changes.

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture. Includes React 19 API changes.

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture. Includes React 19 API changes.

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behaviour, capturing browser screenshots, and viewing browser logs. Use when user asks to test a web app, verify UI, capture screenshots, check browser logs, or debug frontend issues. Do NOT use for Chrome DevTools MCP setup or live-browser console/network triage - use the devtools skill instead. Do NOT use for unit-level component testing (Vitest/Jest cover that).

Build complete UI screens by composing multiple uxscii components. Use when working with .uxm files, when user wants to create, scaffold, or build .uxm screens like login, dashboard, profile, settings, or checkout pages.

This skill should be used when the user asks to "write Rust code", "create a Rust module", "implement a struct", "define a trait", "add error handling", "fix this Rust code", "refactor this Rust", "model this type in Rust", "use async/await", "write an async function", "handle lifetimes", "organize Rust modules", "set up a Rust project", "set up a Cargo workspace", "use serde", "configure tokio", "write Rust tests", or any task involving writing, reviewing, or improving Rust code. Provides best practices for the 2024 edition including type design, error handling, async patterns, trait design, lifetimes, module organization, and testing.

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Use when designing new REST APIs, reviewing API designs, establishing API standards, designing request/response formats, pagination, versioning, authentication flows, or creating OpenAPI specifications.

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing API design standards.

Use when controlling ChatGPT Atlas through Codex Computer Use, especially browser tasks where context efficiency matters: fewer screenshots, fewer UI snapshots, fewer clicks, and cleaner browser state.

Conducts comprehensive backend code reviews including API design (REST/GraphQL/gRPC), database patterns, authentication/authorization, caching strategies, message queues, microservices architecture, security vulnerabilities, and performance optimization for Node.js, Python, Java, Go, and C#. Produces detailed review reports with specific issues, severity ratings, and actionable recommendations. Use when reviewing server-side code, analyzing API implementations, checking database queries, validating authentication flows, assessing microservices architecture, or when users mention "review backend code", "check API design", "analyze server code", "validate database patterns", "security audit", "performance review", or "backend code quality".

Conducts comprehensive backend design reviews covering API design quality, database architecture validation, microservices patterns assessment, integration strategies evaluation, security design review, and scalability analysis. Evaluates API specifications (REST, GraphQL, gRPC), database schemas, service boundaries, authentication/authorization flows, caching strategies, message queues, and deployment architectures. Identifies design flaws, security vulnerabilities, performance bottlenecks, and scalability issues. Produces detailed design review reports with severity-rated findings, architecture diagrams, and implementation recommendations. Use when reviewing backend system designs, validating API specifications, assessing database schemas, evaluating microservices architectures, reviewing integration patterns, or when users mention backend design review, API design validation, database design review, microservices assessment, or backend architecture evaluation.

Build terminal user interfaces with Go and Bubbletea framework. Use when creating TUI apps with the Elm architecture, dual-pane layouts, accordion modes, mouse/keyboard handling, Lipgloss styling, and reusable components. Includes production-ready templates, effects library, and battle-tested layout patterns from real projects. Don't use for plain-text CLI scripts without an interactive UI, web/desktop GUIs, or non-Go terminal frameworks (Ink, Textual, Ratatui).

Context-isolated feature development pipeline. Takes a detailed design/plan as argument and executes the full feature-dev lifecycle (explore, question, architect, implement, review, ship) inside subagents so the primary conversation stays compact. Use when you have a well-defined plan and want autonomous execution with minimal context window consumption.

Use when building CLI tools, implementing argument parsing, or adding interactive prompts. Invoke for CLI design, argument parsing, interactive prompts, progress indicators, shell completions.

Guides systematic code refactoring to improve code quality, maintainability, and design. Identifies code smells, applies refactoring patterns, ensures test coverage, and follows safe refactoring practices. Produces cleaner, more maintainable code while preserving functionality. Use when improving code quality, eliminating technical debt, preparing for feature additions, addressing code smells, or when users mention refactoring, code cleanup, improving design, reducing complexity, or modernizing legacy code.

Author, consume, and enforce a DESIGN.md design system spec (Google Labs open format, package @google/design.md). This skill should be used when the project has a DESIGN.md at the root or under docs/, when the user mentions "design tokens", "design system spec", "DESIGN.md", "tokens.json", needs to translate a design system into Tailwind theme config, export tokens to DTCG, lint token consistency, diff design system revisions, or check WCAG contrast on component color pairs. Acts as the upstream source of truth for impeccable-colorize, impeccable-typeset, impeccable-audit, impeccable-critique, web-design-guidelines, and shadcn.

Rigor Improve implementation leaf skill for auditable candidate implementation in deep learning research repositories. Use when the researcher explicitly authorizes exploratory work on an isolated branch or worktree to transplant modules, adapt a backbone, add LoRA or adapter layers, replace a head, or stitch together meaningful low-risk migration ideas with rollback-aware records in `explore_outputs/`. Do not use for end-to-end exploration orchestration on top of `current_research`, trusted baseline reproduction, conservative debugging, environment setup, verified contribution claims, or default repository analysis.

Build complete React features with proper layered architecture including UI components, business logic, API integration, and state management. Use this skill when users request implementing features like "user authentication", "shopping cart", "product listing", "file upload", or any complete functionality that requires UI + business logic + data fetching. Generates all layers - presentation (components), business logic (hooks/stores/validation), and data access (API calls/React Query). Integrates with react-component-generator for UI and provides production-ready, maintainable code following best practices.

Schema-first validation with Zod, timing patterns (reward early, punish late), async validation, and error message design. Use when implementing form validation for any framework. The foundation skill that all framework-specific skills depend on.

Create React/Vue component with TypeScript, tests, and styles. Auto-invoke when user says "create component", "add component", "new component", or "build component".

GCSE Art and Design (Fine Art) tutor and revision assistant for 15–16 year old students preparing for 2026 exams across AQA, Edexcel, OCR, and Eduqas/WJEC boards. Use when a student asks for help with their art GCSE, sketchbook, portfolio, artist research, annotations, ESA preparation, understanding assessment objectives, or the 10-hour exam. Also triggers on "GCSE Art", "art sketchbook", "ESA themes", "portfolio help", "art annotations", or "Fine Art GCSE".

Expert architectural standards for building scalable Godot GAMES (RPGs, Platformers, Shooters) using the Composition pattern (Entity-Component). Use when designing player controllers, NPCs, enemies, weapons, or complex gameplay systems. Enforces "Has-A" relationships for game entities. Trigger keywords: Entity-Component, ECS, Gameplay, Actors, NPCs, Enemies, Weapons, Hitboxes, Game Loop, Level Design.

Expert blueprint for digital card games (CCG/Deckbuilders) including card data structures (Resource-based), deck management (draw/discard/reshuffle), turn logic, hand layout (arcing), drag-and-drop UI, effect resolution (Command pattern), and visual polish (godot-tweening, shaders). Use for CCG, deckbuilders, or tactical card games. Trigger keywords: card_game, deck_manager, card_data, hand_layout, drag_drop_cards, effect_resolution, command_pattern, draw_pile, discard_pile.

Expert blueprint for programmatic animation using Tween for smooth property transitions, UI effects, camera movements, and juice. Covers easing functions, parallel tweens, chaining, and lifecycle management. Use when implementing UI animations OR procedural movement. Keywords Tween, easing, interpolation, EASE_IN_OUT, TRANS_CUBIC, tween_property, tween_callback.