Development skills

Elasticsearch patterns -- client setup, index management, search DSL, aggregations, vector search, bulk operations, deep pagination

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Query optimization, caching, indexing, connection pooling, async patterns

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Bun-native HTTP framework — routing, TypeBox validation, Eden Treaty, plugins, lifecycle hooks

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Webhook patterns — receiving, sending, signature verification, and retry logic

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GraphQL server for Fastify with Mercurius — loaders, subscriptions, federation, JIT compilation

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PostHog feature flags, rollouts, A/B testing. Use when implementing gradual rollouts, A/B tests, kill switches, remote configuration, beta features, or user targeting with PostHog.

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Hono routes, OpenAPI, Zod validation

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Weaviate vector database patterns with weaviate-client v3 -- collection management, vectorizer modules, hybrid search, filtering, generative search (RAG), multi-tenancy, batch imports

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Express.js routes, middleware, error handling, request/response patterns

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Serverless PostgreSQL on Vercel with edge-compatible SDK

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Chroma vector database -- collection management, automatic embedding, metadata filtering, document storage, query patterns

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Modern CLI development combining oclif's command framework with Ink's React-based terminal rendering

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Tauri 2.x Rust command patterns, state management, error handling, events, channels, testing

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Qdrant vector database -- collection management, point operations, payload filtering, named vectors, quantization, recommendations, snapshots

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Tauri 2.x mobile development - iOS via WKWebView, Android via Android WebView, mobile plugins, Swift/Kotlin native code, permissions, debugging

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Redis in-memory data store patterns with ioredis and node-redis -- caching, sessions, rate limiting, pub/sub, streams, queues, transactions, cluster

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ElevenLabs voice AI SDK patterns for TypeScript/Node.js -- text-to-speech, streaming, voice cloning, speech-to-speech, pronunciation control, and conversational AI

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Upstash serverless Redis -- REST-based client, auto-serialization, pipelines, rate limiting, QStash, edge compatibility, global replication

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MongoDB ODM with schemas, validation, middleware, and TypeScript support

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Serverless PostgreSQL with branching, autoscaling, and edge-compatible driver

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SurrealDB multi-model database - SurrealQL queries, record links, graph relations, live queries, schema definitions, authentication, TypeScript SDK

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Vercel AI SDK patterns - providers, text generation, streaming, structured output, tool calling, chat UI hooks, embeddings, and RAG

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CockroachDB distributed SQL -- transaction retries, multi-region, online schema changes, follower reads, PostgreSQL compatibility gaps

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Appwrite backend-as-a-service — Auth, TablesDB, Storage, Functions, Realtime, permissions model, typed client

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