> browse/registry

> schema-versioning

Set up and manage database schema versioning with migration files, automated rollback capabilities, and CI/CD integration. Use when you need to version database changes, generate migration files from schema diffs, safely roll back failed deployments, or audit schema history. Trigger words: migration, schema change, rollback, database versioning, ALTER TABLE, Prisma migrate, Knex migrations, Flyway, Liquibase.

> rate-limiter

Designs and implements API rate limiting middleware and abuse protection. Use when you need to add request throttling, per-user quotas, IP-based blocking, sliding window or token bucket algorithms, Redis-backed distributed counters, or 429 response handling. Trigger words: rate limit, throttle, API abuse, too many requests, request quota, DDoS protection, brute force prevention, credential stuffing defense.

> neon-branching

You are an expert in Neon's database branching, the feature that creates instant copy-on-write branches of your Postgres database. You help developers set up preview environments with real data, run CI tests against production schemas, test migrations safely, and implement database-per-PR workflows — creating database branches as fast as git branches with zero data copying using Neon's copy-on-write storage.

> nocodb

Build database applications with NocoDB, the open-source Airtable alternative. Use when a user asks to create spreadsheet views of databases, build forms, configure automations, use the NocoDB API, or self-host NocoDB.

> otel-js

Instrument Node.js apps with OpenTelemetry. Use when a user asks to add distributed tracing, collect metrics, instrument HTTP requests, trace database queries, or set up observability for microservices.

> planetscale

Expert guidance for PlanetScale, the serverless MySQL platform built on Vitess (the database clustering system powering YouTube). Helps developers set up databases with Git-like branching for schema changes, non-blocking schema migrations, and connection pooling for serverless environments.

> nhost

Expert guidance for Nhost, the open-source backend platform built on PostgreSQL, Hasura GraphQL, and serverless functions. Helps developers set up authentication, database, file storage, and real-time subscriptions with auto-generated GraphQL APIs and a developer-friendly SDK.

> zeabur

Expert guidance for Zeabur, the cloud deployment platform that auto-detects frameworks, builds and deploys applications with zero configuration, and provides managed services like databases and message queues. Helps developers deploy full-stack applications with automatic scaling and one-click marketplace services.

> ms-access

Build and manage Microsoft Access databases, queries, forms, reports, and VBA automation. Use when someone asks to "create Access database", "write Access queries", "build Access forms", "Access VBA macro", "migrate from Access", "Access report", "link Access to SQL Server", or "convert Access to web app". Covers table design, relationships, SQL queries, forms, reports, VBA automation, and migration strategies to modern platforms.

> victoriametrics

Deploy and configure VictoriaMetrics as a high-performance time-series database for metrics storage and querying. Use when a user needs a Prometheus-compatible long-term storage backend, wants to write MetricsQL queries, configure vmagent for metrics scraping, or set up VictoriaMetrics cluster mode for horizontal scaling.

> mysql

MySQL is the world's most popular open-source relational database management system. Learn installation, SQL queries, indexing strategies, replication setup, and client integration with Node.js (mysql2) and Python (mysql-connector).

> atuin

You are an expert in Atuin, the Rust-based shell history tool that replaces your shell's built-in history with a searchable, syncable, context-aware database. You help developers set up fuzzy search across shell history, sync history across machines, filter by directory/host/session, and analyze command usage — turning shell history from a flat text file into a powerful productivity tool.

> weaviate

Weaviate is an open-source vector database with built-in vectorization modules. Learn schema definition, GraphQL and REST APIs, hybrid search combining BM25 and vectors, and self-hosted deployment with Docker.

> appwrite

Build backends with Appwrite — open-source Backend-as-a-Service. Use when a user asks to set up user authentication, manage a database without writing backend code, handle file storage and uploads, add realtime subscriptions, set up cloud functions, build a mobile or web app backend, replace Firebase with an open-source alternative, or self-host a BaaS platform. Covers auth, databases, storage, functions, realtime, and SDK integration for web, mobile, and server-side.

> tinybird

Build real-time analytics APIs with Tinybird — ingest millions of events and query with SQL over HTTP. Use when someone asks to "build analytics API", "Tinybird", "real-time analytics", "event analytics", "ClickHouse as a service", "usage metering", or "product analytics backend". Covers data ingestion, SQL pipes, API endpoints, and real-time dashboards.

> metabase

Metabase is an open-source business intelligence tool for creating dashboards and visualizations. Learn Docker deployment, database connections, creating questions and dashboards, embedding analytics, and API usage.

> haystack

You are an expert in Haystack, the open-source framework by deepset for building production RAG pipelines and LLM applications. You help developers create composable pipelines with document stores, retrievers, readers, generators, and custom components — connecting to 20+ LLM providers and vector databases with a pipeline-as-code approach.

> websocket-builder

When the user wants to build real-time features using WebSockets. Use when the user mentions "WebSocket," "real-time," "live updates," "socket," "ws," "push notifications," "live chat," "streaming data," or "bidirectional communication." Covers server setup, room management, authentication, reconnection handling, and scaling with Redis pub/sub. For data persistence, see realtime-database.

> turso

You are an expert in Turso, the SQLite-based database platform for production workloads. You help developers use libSQL (Turso's SQLite fork) as a primary database with features like embedded replicas (SQLite file synced from cloud), multi-region replication, vector search, branching, and edge deployment — providing sub-millisecond reads with the simplicity of SQLite and the durability of a cloud database.

> hasura

Expert guidance for Hasura, the GraphQL engine that gives the agent instant, real-time GraphQL APIs over PostgreSQL (and other databases). Helps developers set up Hasura, configure permissions, write custom business logic with Actions and Event Triggers, and optimize GraphQL queries for production.