Web & Frontend

datit309 Skill

Create a Software Design Document (SDD) defining component architecture, data contracts, API schemas, and platform compatibility before planning. Use in Tier 3 (Full Pipeline) or when modifying interfaces, hooks, databases, or multi-platform contracts.

datit309 Skill

Proactive architecture review — explore codebase structure, generate a self-contained HTML report with Mermaid diagrams and candidate improvements, then grill the findings. Use when planning a large refactor, onboarding to an unfamiliar codebase, or before a major architectural change.

datit309 Bundle

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.

datit309 Skill

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI). Generates creative, polished code and UI design that avoids generic AI aesthetics.

datit309 Bundle

Library-agnostic Flutter/Dart code review checklist covering widget best practices, state management patterns (BLoC, Riverpod, Provider, GetX, MobX, Signals), Dart idioms, performance, accessibility, security, and clean architecture.

nicholashidalgo Skill

Technical execution standard for all coding, data engineering, SQL, Python, and implementation work with Nicholas Hidalgo. Governs code generation, documentation rules, stack preferences, testing, and analytics engineering guidance. Layers on top of claude-operator-standard (which must be active) and does not repeat communication, troubleshooting, output format, or session behavior rules. Trigger this skill for any coding task, SQL query, Python script, dbt model, React component, data pipeline, BI logic, or technical implementation request.

joshukraine Bundle

Generate a hands-on QA testing guide as a self-contained HTML page — for Rails apps or static (Hugo) sites. --publish uploads the HTML to the project's configured QA host.

kukucaicndy Bundle

Component placement techniques for EasyEDA Pro schematics. Invoke when placing components, assigning designators, rotating/mirroring parts, or adjusting layout spacing.

markuplint Skill

Reference knowledge for Markuplint HTML linter. Covers violation interpretation, CLI usage, config patterns, and documentation URLs. Auto-loaded when working with HTML linting.

markuplint Skill

Verify documentation claims (README, JSDoc) in spec-heavy packages — @markuplint/types (attribute value types; WHATWG/W3C/RFC/CSS/SVG grammars) and @markuplint/ml-spec (HTML/WAI-ARIA algorithms, spec resolution) — against the live web standards and the actual implementation. Use when auditing or updating README/JSDoc in these packages, or when a doc claim (spec URL, ABNF, numeric count, algorithm description) is suspected stale. Trigger keywords: verify docs, doc audit, spec citation check, ABNF check, README accuracy, JSDoc accuracy.

markuplint Skill

Create and maintain framework parser and spec packages for markuplint — package types, naming, and the architectural constraints that break the build or runtime contracts when violated. Use when adding or modifying any @markuplint/*-parser or @markuplint/*-spec package. Trigger keywords: new parser, template engine parser, framework parser, spec package, ExtendedSpec, ignoreTags, component-scanner.

markuplint Skill

Mirror a preset virtual rule (selectors under `nodeRules` in preset.html-standard.jsonc and similar) into bench/config.ts so the benchmark exercises it. Use when a new disallowed-element / similar selector lands in a preset and the matching nu fixtures remain stuck at nu-only despite the new rule existing in markuplint. Trigger keywords: virtual rule, nodeRules, disallowed-element, preset html-standard, bench config mirror, rule does not fire on bench, preset rule not exercised.

somnio-software Bundle

Execute a comprehensive React Project Health Audit. Analyzes tech stack, architecture, state management, testing, code quality, performance, CI/CD, and documentation. Produces a Google Docs-ready report with section scores and weighted overall score. Use when the user asks to audit a React project, run a health check, evaluate frontend quality, or assess technical debt. Triggers on: 'react audit', 'health audit', 'react health', 'frontend audit', 'next.js audit', 'vite audit', 'project quality check'.

somnio-software Bundle

Execute a comprehensive modern Angular (2+/Angular CLI, TypeScript) frontend Project Health Audit. Analyzes tech stack & runtime, module/component architecture, state & data flow (services/RxJS/signals), templating & change detection, build & bundle pipeline (Angular CLI), testing (Karma/Jasmine or Jest), code quality & tooling (TS strictness, Angular ESLint), dependency hygiene, and documentation. NOT for AngularJS 1.x (use angularjs-health-audit for that). Produces a Markdown report with per-section scores and a weighted overall score. Use when the user asks to audit an Angular project, run a health check, evaluate frontend quality, or assess technical debt. Triggers on: 'angular audit', 'angular health', 'angular cli audit', 'typescript frontend audit', 'ngx audit', 'project quality check'.

somnio-software Bundle

Execute a micro-level React code quality audit. Validates code against live GitHub standards for testing, component architecture, hooks patterns, state management, performance, and TypeScript. Produces a detailed violations report with prioritized action plan. Use when the user asks to check React code quality, validate best practices, or review frontend code standards. Triggers on: 'react best practices', 'react code quality', 'component review', 'hooks review', 'react standards', 'frontend code quality'.

somnio-software Bundle

Execute a micro-level modern Angular (2+/Angular CLI, TypeScript) code quality audit. Validates code against live GitHub standards for testing, component & module architecture, lifecycle & dependency-injection patterns, services & RxJS/signals state, change detection & performance, and TypeScript strictness. Produces a detailed violations report with prioritized action plan. This is modern Angular 2+ (components, NgModules/standalone, DI, RxJS, Angular CLI) — NOT AngularJS 1.x. Use when the user asks to check Angular code quality, validate best practices, or review frontend code standards. Triggers on: 'angular best practices', 'angular code quality', 'angular standards', 'rxjs review', 'ngx best practices'.

somnio-software Bundle

Execute a comprehensive AngularJS (Angular 1.x) Project Health Audit. Analyzes tech stack, module/component architecture, services & data flow, templating & digest hygiene, testing, code quality, build & asset pipeline, and documentation. Produces a Google Docs-ready report with section scores and weighted overall score. Use when the user asks to audit an AngularJS / Angular 1 project, run a legacy frontend health check, evaluate a Bower/Grunt codebase, or assess technical debt. Triggers on: 'angularjs audit', 'angular 1 audit', 'angularjs health', 'legacy frontend audit', 'bower audit', 'project quality check'.

somnio-software Bundle

Execute a micro-level AngularJS (Angular 1.x) code quality audit. Validates code against live GitHub standards for testing, module/component architecture, scope & binding patterns, services & data flow, digest performance, and minification-safe JavaScript standards. Produces a detailed violations report with prioritized action plan. Use when the user asks to check AngularJS 1.x code quality, validate best practices, or review legacy frontend code standards. Triggers on: 'angularjs best practices', 'angular 1 code quality', 'angularjs standards', 'minification-safe DI review'.

spillwavesolutions Skill

Capture Mermaid or PlantUML diagrams (architecture, component, activity, state, class, ERD, sequence) and PlantUML wireframes for reports/dashboards into the DEKC second brain.

tumf Bundle

アプリ組み込み AI チャットフロントエンドの設計・実装ガイド。 前半は言語非依存の抽象設計パターン（ストリーミングファースト、チャット状態マシン、 メッセージモデル、楽観的UI、エラーリカバリ、UX原則、マルチセッション、サーバー設計原則）、 後半は Vercel AI SDK (useChat) による TypeScript 具体実装。 フレームワーク非依存（Next.js, React SPA, Vue, Svelte, SvelteKit, Nuxt 対応）。 Use when チャット機能を追加したい、AIチャットUIを作りたい、useChat を使いたい、 ストリーミングチャットを実装したい、チャットボットUIを組み込みたい、 AI SDK でチャットを作る、またはチャットUIの設計パターンを整理・レビューしたい時。 Python/Go/Rust 等の非 TypeScript 環境でも設計パターン部分は適用可能。 既存のチャットUIのレビュー・改善にも使える。 対象外: チャット以外の AI SDK 用途（テキスト生成のみ、画像生成、エンベディング等）。

tumf Bundle

デジタル庁のダッシュボードデザイン実践ガイドブックに基づく、見やすいダッシュボード設計・作成のガイド。グラフ選び、レイアウト、カラーパレット、アクセシビリティ、チェックリストを網羅。Use when ダッシュボードを新規作成したい、既存ダッシュボードを改善したい、可視化設計をレビューしたい、または軽量HTML・Grafana・SQLiteベースのダッシュボード設計方針を決めたい時。

turntuptechnologies-ai Skill

React のフロントエンド/SPA Web アプリを新規に作るとき。「React アプリを作る」「Vite でフロントを立ち上げ」等で使う。Vite + React + TypeScript + Tailwind v4 + Vitest の構成で雛形を用意する（API 連携なら TanStack Query）。土台は new-project-init を先に使う。

turntuptechnologies-ai Skill

ブラウザ拡張機能を新規に作るとき。「拡張機能を作る」「WXT で拡張を立ち上げ」等で使う。WXT + React + TypeScript + Tailwind CSS v4 + Vitest の構成で雛形を用意する。土台（CLAUDE.md・git）は new-project-init を先に使う。

velt-js Bundle

Velt collaboration SDK setup guide for React, Next.js, Angular, Vue, and HTML applications. Use this skill when setting up Velt for the first time, configuring VeltProvider, implementing user authentication with authProvider and JWT tokens, initializing document collaboration with setDocuments, adding VeltUserInviteTool for share & invite flows, or debugging Velt setup issues. Triggers on any task involving Velt installation, VeltProvider configuration, auth token generation, document identity setup, share/invite components, or project structure for Velt integration — even if the user doesn't explicitly mention "setup".

velt-js Bundle

Best practices for Velt Arrows — the directional arrow annotation feature that lets users draw arrows pinned to DOM elements for visual feedback, design review, or collaborative pointing. Use whenever the user is adding Velt Arrows to their app, placing the VeltArrows or VeltArrowTool components, restricting arrows to specific DOM regions via allowedElementIds, enabling dark mode, customizing the arrow tool button (CSS ::part hooks or full custom-button slot replacement), reading the ArrowAnnotation data model (annotationId, from, targetElement, position, props.arrowLength / props.arrowAngle), or working with the ArrowElement API (client.getArrowElement). Triggers on any task involving Velt Arrows, drawn arrow pins, arrow annotations, directional pointing UI, design-review arrows, the VeltArrows / VeltArrowTool / velt-arrows / velt-arrow-tool web components, or ArrowAnnotation — even when the user does not explicitly say 'Velt' or 'arrows'.

velt-js Bundle

Velt Huddle implementation patterns and best practices for React, Next.js, and web applications. Use when adding audio/video/screen sharing huddles, in-app voice or video calls, ephemeral chat within huddles, flock mode (follow me), cursor-mode huddle bubbles, or huddle webhook integration. Triggers on any task involving huddles, video calls, audio calls, screen sharing sessions, VeltHuddle, VeltHuddleTool, or collaborative real-time communication features — even if the user doesn't explicitly say 'huddle'.

velt-js Bundle

Velt Cursors implementation patterns and best practices for React, Next.js, and web applications. Use when adding real-time cursor tracking, collaborative cursor sharing, avatar-mode cursors, cursor element whitelisting, cursor inactivity timeouts, cursor position subscriptions, customizing the cursor pointer wireframe and its flat-config componentConfig template variables (cursorUser, showAvatar / showAudio / showVideo, huddle-on-cursor flags, helper functions), or customizing the Live Selection remote-user indicator wireframe (VeltSelectionElementPortalWireframe / velt-selection-element-portal, live-selection, selection-element-portal, userIndicatorPosition / userIndicatorType, selections). Triggers on any task involving live cursors, collaborative cursor display, live selection indicators, VeltCursor, VeltCursorPointerWireframe, VeltSelection*, cursor tracking on canvas or whiteboard, or showing where other users are pointing or selecting — even if the user doesn't explicitly say 'cursors' or 'live-selecti

velt-js Bundle

Velt Activity Logs implementation patterns and best practices for React, Next.js, and web applications. Use when adding real-time activity feeds, custom activity logging, audit trails, CRDT debounce configuration, server-side activity management via REST API, customizing the Activity Log wireframe with template variables (velt-data, velt-if, velt-class), or composing the VeltActivityLogWireframe sub-component tree (Header, Filter, List, DateGroup, Item, ShowMore, Empty, Loading).

velt-js Bundle

Velt Comments implementation patterns and best practices for React, Next.js, and web applications. Use when adding collaborative commenting features, comment modes (Freestyle, Popover, Stream, Text, Page), rich text editor comments (TipTap, SlateJS, Lexical), Apryse WebViewer (PDF/docx) comments, media player comments, chart comments, comments sidebar setup and customization (embed mode, floating mode, focused thread, V2 sidebar), sidebar filtering with accessModes for privacy, isAnnotationPrivate() visibility routing, CommentDialogActionService.isSubmitInFlight() for duplicate-submit guards, VeltCommentDialogAgentSuggestion primitives for AI suggestion accept/reject UIs, agent comment annotations via REST API (agent block with agentSource/agentId/executionId, agent-specific GET filters, suggestionAccepted/suggestionRejected client events, sourceType "agent" UI rendering), or binding Comment Bubble / Comment Dialog / Comment Tool wireframe slots via template variables (velt-data, velt-if, velt-class).

velt-js Bundle

Velt Node SDK (`@veltdev/node`) implementation patterns for Node.js / TypeScript backends. Use whenever the user is writing server-side code that integrates with Velt — initializing `VeltSDK`, calling `sdk.api.*` (REST API services like Organizations, Documents, Comment Annotations, etc.) or `sdk.selfHosting.*` (MongoDB+S3 self-hosted services like Comments, Reactions, Attachments), generating JWT auth tokens for the frontend SDK from Node, configuring MongoDB or AWS S3 for self-hosting, handling the SDK's typed error classes (`VeltSDKError`, `VeltDatabaseError`, `VeltValidationError`, `VeltTokenError`, `VeltApiError`), debugging response-envelope mismatches between the two backends, or shipping Node code that talks to Velt in any way. Triggers on any mention of `@veltdev/node`, `VeltSDK`, `sdk.api`, `sdk.selfHosting`, Velt server-side Node.js, MongoDB-backed Velt storage, or env-var auth (`VELT_API_KEY` / `VELT_AUTH_TOKEN`) — even if the user doesn't say "Node SDK" explicitly.

velt-js Bundle

Velt Presence implementation patterns and best practices for React, Next.js, and web applications. Use when adding user presence avatars, online/away/offline status indicators, real-time cursor tracking, inactivity timeout configuration, location-based presence filtering, presence data subscriptions, or flock mode (follow me) shared navigation sessions with enableFlockMode, startFollowingUser, stopFollowingUser, onNavigate callback, and defaultFlockNavigation. Triggers on any task involving user presence, active user avatars, who's online indicators, cursor sharing, VeltPresence, VeltCursor, follow-along features, or collaborative awareness features — even if the user doesn't explicitly say 'presence'.

velt-js Bundle

Velt Recorder implementation patterns and best practices for React, Next.js, and web applications. Use when adding audio, video, or screen recording features, recording playback, video editing, recording transcription, managing recording lifecycle events, or binding Recorder wireframe slots with template variables (velt-data / velt-if / velt-class).

velt-js Bundle

Best practices for Velt Inline Reactions — the emoji-reaction feature for adding contextual emoji feedback to elements of your app (articles, posts, images, charts, custom UI). Use whenever the user is adding the VeltInlineReactionsSection component, binding it to a target element via targetReactionElementId, configuring custom reaction emojis (image URLs, iconUrl, or unicode emoji) via setCustomReactions, calling client.getReactionElement(), customizing the wireframe primitives (velt-reaction-tool-wireframe, velt-reaction-pin-wireframe, velt-inline-reactions-section-wireframe, and their nested reactions-panel / tooltip children), binding componentConfig.* template variables (annotation, isReactionSelectedByCurrentUser, tooltipVisible, annotations, targetReactionElementId), or reading the ReactionAnnotation data model. Trigger on any task involving Velt reactions, emoji reactions on content, inline-reactions UI, contextual emoji feedback, or VeltInlineReactionsSection — even if the user does not explicitly sa

velt-js Bundle

Velt REST API v2 and webhook best practices for server-side integration. Use when calling Velt REST API v2 endpoints, generating JWT tokens for frontend authentication, handling Velt webhooks (comment events, huddle events, CRDT updates), managing users/documents/organizations via REST, or implementing server-side Velt operations. Triggers on any task involving Velt REST API, JWT token generation for Velt, Velt webhooks, x-velt-api-key headers, or server-side comment/notification/activity management — even if the user doesn't explicitly say 'REST API'. For the Python SDK (velt-py) for self-hosting, see velt-self-hosting-data-best-practices instead.

velt-js Bundle

Velt Suggestions implementation patterns and best practices for React, Next.js, and web applications. Use when adding suggestion mode (propose-then-review workflow), AI agent suggestion comments, accept/reject flows, suggestion targets on form inputs or custom components, suggestion status lifecycle (pending/accepted/rejected/stale), drift detection, or querying suggestions programmatically. Triggers on any task involving Velt suggestions, suggestion mode, data-velt-suggestion-target, SuggestionElement, useSuggestionUtils, enableSuggestionMode, commitSuggestion, suggestionAccepted, suggestionRejected, or building a propose-and-review editing workflow — even if the user doesn't explicitly say 'suggestions'.

velt-js Bundle

Velt Notifications implementation patterns and best practices for React, Next.js, and web applications. Use when adding in-app notifications, notification panels, email notifications via SendGrid, webhook integrations, user notification preference management, cross-organization notification feeds with enableCrossOrganization/disableCrossOrganization, or binding Notifications Panel / Notifications Tool wireframe slots with template variables (velt-data, velt-if, velt-class).