Development Claude Skills
8 676 development skills from 759 authors. They write and change code. Half of them fit into 1 830 tokens or less — that is what one costs your context window when the agent loads it. 1 213 ship runnable scripts rather than instructions alone. 42 of them cannot work without an MCP server, most often rube. We also found 1 172 copies of these same skills sitting in other people's repositories — counted once here, not 1 172 times.
8 676 unique 759 authors 5 250 updated this month 1 369 from vendors
Production-readiness for React Native — server-minted auth tokens, user management CRUD, external-backend recipes (Express / Hono / Firebase Functions / Vercel Serverless). RN has no API routes, so the backend is always external.
Push notifications for React Native CometChat — APNs + FCM setup, dashboard provider configuration, client registration, token lifecycle, foreground display, background wake, tap-to-deep-link, and the Expo Go / APNs-environment traps that silently break production.
Diagnose CometChat React Native UI Kit integration failures — init/login, gesture handler, pod install, iOS privacy manifest, Android Maven, Metro cache, permissions, calls, extensions, v4-to-v5 upgrade. For push-specific symptoms see cometchat-native-push § 12.
Foundational rules for CometChat Android UI Kit v5. Initialization, login, UIKitSettings builder, dependency setup, and anti-patterns. Read this first.
CometChat Calls v6 integration for native Android (V6 stable, GA 2026-05-25 — Compose + Kotlin Views). Works end-to-end on chatuikit-compose-android:6.0.0 (validated 2026-05-12 against web peer) — but only with FIVE non-obvious workarounds the kit itself doesn't ship — (1) explicit calls-sdk-android:5.0.+ peer dep, (2) annotations-java5 exclude, (3) stub classes for legacy com.cometchat.calls.{CometChatRTCView, model.RTCUser, model.RTCReceiver, model.RTCCallback} to satisfy chat-sdk's CallManager bytecode, (4) AVOID CometChatCallButtons (broken — captures first-rendered user globally; ignores per-row prop) — instead wire your own button to CometChat.initiateCall then CometChatCallActivity.Companion.launchOutgoingCallScreen(context, call, null), (5) Call constructor arg order CHANGED in chat-sdk 5.x — (receiverUid, receiverType, type) not (receiverUid, type, receiverType). Covers UIKitSettings calling configuration, surface-aware Compose+Views routing, foreground service correctness on Android 14+, ConnectionService + FCM VoIP push.
CometChat Android UIKit v6 UIKitSettings configuration — all builder options for SDK init, presence, calling, and host overrides
CometChat Android UIKit v6 core setup — Gradle dependencies, SDK initialization, login/logout, and message sending
V5→V6 migration recipes for native Android. CometChat ships V5 (chat-uikit-android:5.x — Java + Kotlin Views) and V6 (chatuikit-{compose,kotlin}-android:6.x — GA 2026-05-25 — Compose surface OR Kotlin Views, calls bundled) side-by-side. Covers when to migrate vs stay, the cohort-selection decision (Compose vs Kotlin Views on V6), gradle dependency rewrites, builder API changes (UIKitSettings replaces UIKitSettingsBuilder), theme system rewrite (CometChatTheme.DayNight), calls integration delta (calling UI bundled, but calls-sdk-android:5.0.+ is still a required peer dep), Activity theme rules, side-by-side cohort selection during migration, and a verification checklist.
CometChat Calls integration for Angular UI Kit v5 (@cometchat/chat-uikit-angular@5). Covers enabling calling via UIKitSettingsBuilder().setCallingEnabled(true), the kit's standalone call components (<cometchat-call-buttons>, <cometchat-incoming-call>, <cometchat-outgoing-call>, <cometchat-ongoing-call>, <cometchat-call-logs>), the @Input-callback-vs-@Output binding split, app-wide incoming-call mounting, the @cometchat/calls-sdk-javascript@^5 peer dep, NgZone correctness, getUserMedia handling, and additive-vs-standalone modes.
Angular-specific integration patterns for CometChat UI Kit v5 (@cometchat/chat-uikit-angular@5) — standalone bootstrap with main.ts init-before-bootstrap, functional route guards (CanActivateFn), lazy standalone routes (loadComponent), NgZone correctness for SDK callbacks, OnPush change detection, and SSR/Angular-Universal considerations.
Production-readiness for CometChat Angular UI Kit v5 (@cometchat/chat-uikit-angular@5) — server-minted auth tokens via CometChatUIKit.loginWithAuthToken(authToken), user management CRUD, environment.prod.ts hardening (no authKey, no REST API Key), external-backend recipes (Express / Hono / Firebase Functions / Vercel), and the security checklist. Angular ships src/ to the client, so the REST API Key is always server-only.
Framework-specific patterns for integrating CometChat React UI Kit v6 into Astro projects using React islands. Covers client:only rendering, island communication, CSS handling, and common pitfalls.
Complete catalog of CometChat React UI Kit v6 components. Reference before writing integration code -- never invent component names.
Customize a CometChat React UI Kit integration beyond what `cometchat init` and `cometchat apply-feature` produce — custom message bubbles, custom header views, custom subtitle views, custom empty/loading states, custom action menus, request builder filters, event listeners, and component composition. Picks up where the framework skills end (after Phase A init succeeds).
Shared rules for CometChat React UI Kit v6. Always loaded alongside framework + placement skills. Read this first.
CometChat Calls integration for Flutter UIKit v5 (GetX-based chat kit) on the v5 Calls SDK (cometchat_calls_sdk ^5.0.2, added as a DIRECT dependency — raw SDK + custom call surface). Covers the 5.x lifecycle (CometChatCalls.init/login/loginWithAuthToken/generateToken/joinSession/getLoggedInUser), the CallSession.getInstance() in-call controls (mute/pauseVideo/switchCamera/raiseHand/setLayout/setAudioModeType/recording/leaveSession), SessionSettingsBuilder, the 5 split listeners (SessionStatus/ParticipantEvent/MediaEvent/ButtonClick/Layout), Android FCM + ConnectionService for VoIP push, iOS CallKit + PushKit, foreground service correctness on Android 14+, hangup cleanup, and additive-vs-standalone modes. The 4.x-bound cometchat_calls_uikit prebuilt call widgets are documented only as a legacy alternative incompatible with the 5.x calls SDK.
> Use when writing any code that uses cometchat_chat_uikit. Contains hard rules that prevent silent failures, crashes, and subtle bugs. Covers CometChatUIKit.init, login, logout, UIKitSettings, UIKitSettingsBuilder, listener lifecycle, theme caching, Scaffold resizeToAvoidBottomInset, subscriptionType, region, muid preservation, and the Clean Architecture + BLoC component pattern. Also use when seeing errors like "Authentication null", "APP ID null", ERR_ALREADY_LOGGED_IN, or StateError from uninitialized ServiceLocator. Make sure to use this skill for any CometChat Flutter UIKit code, even simple widget usage.
> Use when working with real-time events, SDK listeners, or UI event streams in CometChat Flutter UIKit v6. Triggers on mentions of CometChatMessageEvents, CometChatUserEvents, CometChatGroupEvents, CometChatCallEvents, CometChatConversationEvents, MessageListener, UserListener, GroupListener, CallListener, ConnectionListener, ccMessageSent, ccMessageEdited, ccMessageDeleted, ccUserBlocked, ccUserUnblocked, ccGroupMemberKicked, ccGroupMemberBanned, onMessageReceived, onTypingStarted, onTypingEnded, onUserOnline, onUserOffline, onMessageDelivered, onMessageRead, addMessageListener, removeMessageListener, ChatSDKEventInitializer, or any real-time update handling in CometChat.
> tab-based home (IndexedStack), Navigator.push messages screen, modal/bottom sheet chat, thread overlay, embedded panel, and floating widget. Includes Scaffold configuration, resizeToAvoidBottomInset, SafeArea, and keyboard-aware spacing patterns. Triggers on "add chat to my app", "where to put chat", "messages screen layout", "tab bar with chat", "chat in modal", "chat in drawer", "embedded chat", "Scaffold layout", or "keyboard handling".
> Use when migrating a CometChat Flutter app from UIKit v5 (cometchat_calls_uikit + GetX) to UIKit v6 (cometchat_chat_uikit unified package, no GetX). Covers import changes, dependency cleanup, GetX removal, init/login pattern changes, navigation rewrites, screen structure flattening, notification service updates, and BuilderSettings removal. Also use when seeing imports from cometchat_calls_uikit, get/get.dart, or v5-era patterns like GetBuilder, Get.put, Get.find, PageManager, BuilderSettings, or CometChatCallingExtension.
Localization (i18n) across all CometChat UI Kit families — React, React Native, Angular, Android (V5/V6), iOS, Flutter (V5/V6). Covers CometChatLocalize.init signature differences (positional vs object), bundled languages, custom-language registration, RTL support, fallback to English, and cross-family drift risks. Cross-family — applies wherever the agent is configuring CometChat localization.
CometChat Calls SDK v5 integration for native iOS (Swift; SwiftUI + UIKit hosting). Covers SDK install (SPM + CocoaPods), CometChatCalls init, dual-SDK ringing (Chat SDK initiateCall + Calls SDK generateToken/startSession), CallKit + PushKit VoIP push, AVAudioSession routing, mixed-stack hosting (UIViewControllerRepresentable for SwiftUI), Info.plist permissions + Background Modes, and additive-vs-standalone modes.
Integration patterns for bare React Native CLI projects — pod install, Info.plist + AndroidManifest permissions, Apple privacy manifest, native module linking, Metro config.
CometChat Calls SDK integration for React Native (Expo managed + bare CLI). Covers @cometchat/calls-sdk-react-native install, dual-SDK init, native module linking (iOS pods, Android Gradle), VoIP push via react-native-callkeep + react-native-voip-push-notification + @react-native-firebase/messaging, CallKit on iOS / ConnectionService on Android, foreground service correctness on Android 14+, gesture handler + reanimated peer deps, Expo-specific config plugins, and additive-vs-standalone modes.
Shared rules for CometChat React Native UI Kit v5. Always loaded alongside framework (expo/bare) and placement skills. Read this first.
Customize the CometChat React Native UI Kit without forking — four-tier model: props → request builders → text formatters + message templates → DataSource decorators + event bus.
Where to put chat in a React Native app — Stack screen, BottomTab, Modal, BottomSheet, Embedded. Maps each to CometChat component composition with ASCII layout references.
Production-readiness for React Native — server-minted auth tokens, user management CRUD, external-backend recipes (Express / Hono / Firebase Functions / Vercel Serverless). RN has no API routes, so the backend is always external.
Feature catalog for React Native — calls (separate SDK + WebRTC), extensions (polls / stickers / translation / link preview / collaborative doc / whiteboard / smart replies), AI agent, in-call chat. When to toggle, install, or swap.
Push notifications for React Native CometChat — APNs + FCM setup, dashboard provider configuration, client registration, token lifecycle, foreground display, background wake, tap-to-deep-link, and the Expo Go / APNs-environment traps that silently break production.
Diagnose CometChat React Native UI Kit integration failures — init/login, gesture handler, pod install, iOS privacy manifest, Android Maven, Metro cache, permissions, calls, extensions, v4-to-v5 upgrade. For push-specific symptoms see cometchat-native-push § 12.
Framework-specific patterns for integrating CometChat React UI Kit v6 into Next.js projects (App Router and Pages Router). Covers SSR prevention, provider setup, route placement, API routes, and common pitfalls.
CometChat Calls SDK integration for web React apps (Vite, CRA, Next.js, React Router, Astro). Covers @cometchat/calls-sdk-javascript install, dual-SDK init (Chat SDK + Calls SDK), generateToken (v4's getRTCToken was removed in v5), the kit's CometChatIncomingCall / CometChatOutgoingCall / CometChatOngoingCall components, CallButtons composition, getUserMedia permissions, browser TURN/STUN handling, and additive-vs-standalone modes.
Framework-specific patterns for integrating CometChat React UI Kit v6 into React projects (Vite or CRA). Covers provider setup, routing, layout integration, env vars, and common pitfalls.
Push notifications for CometChat React UI Kit v6 in Vite / Next.js / React Router / Astro projects. Recommended path is CometChat-native web push via Firebase Cloud Messaging for Web — `CometChatNotifications.registerPushToken(token, PushPlatforms.FCM_WEB)` + a dashboard FCM provider, so CometChat's own backend delivers new-message pushes with NO self-hosted push server. Also documents an optional advanced self-hosted Web Push fallback (Service Worker + Push API + VAPID + message-sent webhook) for projects that can't use Firebase. Covers click-through to chat, foreground vs background handling, iOS Safari 16.4+ PWA-only quirks, and HTTPS requirements.
Framework-specific patterns for integrating CometChat React UI Kit v6 into React Router projects (v6 library mode and v7 framework mode). Covers SSR prevention, routing patterns, outlet nesting, and common pitfalls.
Testing patterns for CometChat React UI Kit v6 in Vite / Next.js / React Router / Astro projects. Covers Vitest + React Testing Library setup, mocking @cometchat/chat-sdk-javascript and @cometchat/chat-uikit-react, Playwright e2e for full chat flows, the chat-specific assertions (init resolves before render, error UI visible, no Auth Key in test files, css-variables.css imported once), and CI configuration. Sister skill of cometchat-react-calls/references/testing-calls-on-web.md.
Entry-point for CometChat integration in any React, React Native, Angular, Android, Flutter, or iOS project — web (React/Next.js/React Router/Astro), React Native (Expo/bare), Angular (12-15), native Android (V6 stable, V5 legacy), Flutter (V6 stable, V5 legacy), and native iOS (V5 stable). Detects the framework, gathers requirements through an interactive conversation, and writes production-quality integration code.
Converts a PRD markdown file into GitHub Issues (parent + sub-issues) for ralph-github-start-loop to execute. Use when user wants to push PRD stories to GitHub Issues.
Runs autonomous loop fetching stories from GitHub Issues. Implements and closes issues as done. Triggers on "loop through my PRDs", "work on my issues", "start the autonomous loop", "implement my PRDs", or requests to work through GitHub issues autonomously.
Runs the Ralph autonomous loop. Executes stories from prds/*.json using git worktrees.
Reviews PR comments from GitHub (Copilot, reviewers), evaluates against actual code, replies with reasoning, and resolves threads. Triggers on "review pr comments", "address pr feedback", "fix pr comments", or "review copilot suggestions".
Convert a codebase into a self-contained HTML portal app for ingestion into AI application systems. Produces a single deployable HTML file with embedded CSS, JS, and data.
Git best practices for version control and collaboration
Design RESTful APIs with best practices for consistency and usability
Use whenever the user wants to find, shortlist, vet, or enrich US management consultancies — strategy, operations, executive coaching, leadership development, org-development/change management, PMO/program management, sales/revenue operations consulting. Triggers on "find me three top strategy consultancies in California", "shortlist boutique ops-consulting firms with healthcare experience", "we need an executive coach for our new CEO", or "pull contact info for these 10 consulting firm domains", even when described indirectly (post-merger integration help, change-management partner, fractional COO). Drives the ServiceGraph API (api.servicegraph.co) — a 100k+ US firm catalog filterable by industry, services, location, size, ratings. Skip in-house strategy hires, "help me build a strategy" do-the-work asks, framework comparisons (Lean vs Agile, BCG matrix, etc.), academic/MBA-program questions, life/career coaching for individuals, non-US firms, individual freelancers.
Audit JavaScript, TypeScript, and Go comments for verified stale, orphaned, misleading, or redundant claims.
Use for dependency updates: bump npm/pnpm/yarn/bun packages, check outdated, or run taze.