LlamaIndex.TS data framework for RAG, indexing, retrieval, query engines, chat engines, and agentic workflows in TypeScript — from agents-inc/skills
Upstash serverless Redis -- REST-based client, auto-serialization, pipelines, rate limiting, QStash, edge compatibility, global replication
Reactive programming with RxJS - Observables, operators, Subjects, error handling, and memory leak prevention
React Native Skia GPU-accelerated 2D graphics - Canvas, declarative drawing, shaders, image filters, Paragraph text, Atlas batch rendering, Reanimated animations
TypeScript strict mode configs, TS 5.x+ options (verbatimModuleSyntax, module preserve, moduleDetection force, configDir), path alias sync, specialized configs
Weaviate vector database patterns with weaviate-client v3 -- collection management, vectorizer modules, hybrid search, filtering, generative search (RAG), multi-tenancy, batch…
CLI code review patterns. Use when reviewing CLI applications built with Commander.js, @clack/prompts, picocolors.
TypeScript Result/Either types for type-safe error handling, railway-oriented programming patterns, error as values
Type-safe client-side routing for React with file-based routes, search params validation, loaders, and code splitting
date-fns patterns for TypeScript - formatting, parsing, manipulation, comparison, timezone handling, and internationalization
Secrets management, XSS prevention, CSRF protection, dependency scanning, DOMPurify sanitization, CSP headers, CODEOWNERS, HttpOnly cookies
React Hook Form patterns - useForm, Controller, useFieldArray, validation resolver, performance optimization
Husky v9 setup, lint-staged v16 patterns, commitlint with conventional commits, CI/production handling, monorepo setup, migration from v8
WatermelonDB reactive local database for React Native - schema, models, decorators, reactive queries, relations, writers/readers, batch operations, migrations, sync
Official OpenAI SDK patterns for TypeScript/Node.js — client setup, Chat Completions, Responses API, streaming, structured outputs, function calling, embeddings, vision — from…
Playwright E2E testing patterns - test structure, Page Object Model, locator strategies, assertions, network mocking, visual regression, parallel execution, fixtures, and…
Pinecone serverless vector database -- index management, vector operations, metadata filtering, namespaces, hybrid search, inference API
AI specification planning frameworks. Use when a spec touches model calls, prompts, retrieval, tool calling, agentic loops, or evals.
Secure storage, certificate pinning, biometric auth, jailbreak detection, code obfuscation, network security, screenshot prevention for React Native
Apollo Client GraphQL patterns - useQuery, useMutation, cache management, optimistic updates, subscriptions
React Native Gesture Handler - gesture types, GestureDetector, gesture composition, state machine, platform-specific gestures, swipeable rows, hover gestures
Detox E2E gray-box testing for React Native - matchers, actions, expectations, waitFor, device API, synchronization, mocking, artifacts, CI integration
TanStack Form patterns - useForm, form.Field, validators, arrays, linked fields, createFormHook, type safety
SQL query builder for PostgreSQL, MySQL, SQLite, and MSSQL -- fluent queries, schema builder, migrations, seeds, transactions, raw queries
Speech-to-text transcription and translation via OpenAI Audio API -- models, response formats, timestamps, prompting, streaming, chunking, and diarization — from agents-inc/skills
Tauri 2.x Rust command patterns, state management, error handling, events, channels, testing
File-based routing, loaders, actions, defer streaming, useFetcher, error boundaries, progressive enhancement
ElevenLabs voice AI SDK patterns for TypeScript/Node.js -- text-to-speech, streaming, voice cloning, speech-to-speech, pronunciation control, and conversational AI — from…
Error boundary patterns, fallback UI, reset/retry, react-error-boundary library, React 19 createRoot error hooks
Elasticsearch patterns -- client setup, index management, search DSL, aggregations, vector search, bulk operations, deep pagination
Electron process architecture, IPC patterns, preload security, native APIs, packaging and distribution
Code review patterns, feedback principles. Use when reviewing PRs, implementations, or making approval/rejection decisions.
Firebase backend-as-a-service — Firestore, Authentication, Cloud Functions v2, Storage, Hosting, Admin SDK, security rules, emulator suite
Docusaurus 3.x documentation framework — site configuration, docs/blog plugins, sidebars, versioning, MDX, swizzling, and deployment
ESLint 9/10 flat config with defineConfig(), Prettier v3.0+ shared config, eslint-config-prettier integration, typescript-eslint v8+ projectService
Design token architecture - primitive/semantic/component tiers, naming grammar, CSS custom property delivery, and DTCG build pipelines
Tauri 2.x official plugin ecosystem, plugin APIs, permissions, and custom plugin development
Direct PostgreSQL access with node-postgres (pg) -- connection pools, parameterized queries, transactions, streaming, LISTEN/NOTIFY, error handling
Graph-relational database with EdgeQL query language, code-first schema, link-based relations, computed properties, and fully typed TypeScript query builder
View Transitions API patterns - same-document transitions, cross-document MPA transitions, shared element animations, pseudo-element styling, accessibility
Vercel deployment platform — project configuration, serverless/edge functions, Routing Middleware, cron jobs, environment variables, monorepo setup
Modern CLI development combining oclif's command framework with Ink's React-based terminal rendering
pnpm workspace protocol, filtering, catalogs, shared dependencies, publishing, and CI/CD for monorepo management
Auth.js (NextAuth v5) authentication patterns - configuration, providers, session strategies, middleware, database adapters, role-based access, Edge compatibility
Leaflet interactive maps - map setup, tile layers, markers, popups, GeoJSON, custom controls, plugins, clustering, events
Server-Sent Events for unidirectional server-to-client streaming, EventSource API, fetch streaming, reconnection patterns, message parsing
Cross-platform auto-update patterns with electron-updater (electron-builder ecosystem)
VisionCamera v4+ - photo/video capture, QR/barcode scanning, real-time frame processors, zoom/focus/exposure, HDR, location metadata, format selection
Client-side routing with data APIs — loaders, actions, error boundaries, search params, nested layouts, and code splitting
CSS Animation patterns - transitions, keyframes, scroll-driven animations, @property, GPU-accelerated properties, accessibility with prefers-reduced-motion
Official Mistral AI TypeScript SDK patterns — client setup, chat completions, streaming, function calling, structured outputs, embeddings, vision, Codestral FIM, and prod — from…
Nuxt patterns - file-based routing, data fetching (useFetch/useAsyncData), useState, server routes, middleware, auto-imports, layouts, SEO