> browse/registry

> 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).

> n8n-self-host

Self-host, configure, scale, and manage n8n instances. Use when a user asks to install n8n with Docker, set up n8n in production, configure n8n environment variables, scale n8n with workers, back up n8n workflows, restore n8n data, manage n8n via CLI or REST API, monitor n8n, troubleshoot n8n issues, set up n8n with PostgreSQL, or deploy n8n with a reverse proxy. For designing n8n workflows and nodes, see n8n-workflow.

> rsync

Sync files and directories with rsync. Use when a user asks to copy files between servers, sync directories, create incremental backups, deploy files to a remote server, or mirror directories efficiently.

> lucia-auth

You are an expert in Lucia, the lightweight authentication library for TypeScript. You help developers implement session-based authentication with email/password, OAuth (Google, GitHub, Discord), magic links, and two-factor authentication — providing a simple, database-agnostic auth layer that you understand and control, without the complexity of full auth platforms.

> lottie

Play After Effects animations on web and mobile with Lottie — load JSON animation files, control playback, listen to events, and integrate animations into React, Vue, or vanilla JS apps. Use when tasks involve adding motion graphics, animated icons, loading indicators, or micro-interactions exported from After Effects or other animation tools.

> maestro

When the user wants to write mobile UI tests using Maestro's simple YAML-based flow definitions. Also use when the user mentions "maestro," "mobile UI testing," "YAML mobile tests," "maestro flows," or "maestro studio." For React Native-specific gray-box testing, see detox. For cross-platform mobile automation, see appium.

> sharepoint

Build integrations with SharePoint Online for document management, site automation, and intranet development. Use when someone asks to "integrate with SharePoint", "upload files to SharePoint", "manage SharePoint lists", "create SharePoint site", "automate SharePoint", "search SharePoint documents", "SharePoint API", or "SharePoint permissions". Covers Graph API for sites, lists, document libraries, file operations, search, permissions, and SharePoint Framework (SPFx) development.

> make-com

You are an expert in Make.com (formerly Integromat), the visual automation platform for connecting apps and building workflows without code. You help teams build scenarios using drag-and-drop modules, routers for conditional logic, iterators for array processing, and aggregators for data collection — enabling non-technical users to automate business processes across 1,500+ apps.

> devcontainers

Define reproducible development environments with Dev Containers. Use when a user asks to standardize dev environments, set up VS Code remote containers, create reproducible dev setups, or onboard developers faster.

> subfinder

Discover subdomains of a target domain using passive and active enumeration techniques. Use when tasks involve subdomain enumeration, attack surface mapping, DNS reconnaissance, finding hidden services, identifying forgotten subdomains, or expanding the scope of a security assessment. Subfinder uses passive sources (certificate transparency logs, DNS datasets, search engines) to find subdomains without touching the target directly.

> systemd

Manage Linux services with systemd. Use when a user asks to create a system service, run an app on boot, manage background processes, set up timers (cron replacement), or configure service dependencies and auto-restart.

> facebook-marketing

Create, optimize, and automate Facebook content for Pages, Groups, and Ads. Use when someone asks to "grow Facebook page", "create Facebook ads", "manage Facebook group", "Facebook API integration", "automate Facebook posting", "Facebook analytics", or "Facebook marketing strategy". Covers Pages, Groups, Graph API publishing, Ads Manager API, Messenger bots, and growth strategies.

> just

Run project commands with just (a modern make alternative). Use when a user asks to define project commands, replace Makefile, create a command runner, or standardize dev scripts.

> litellm

Call 100+ LLM APIs with one interface using LiteLLM — unified API proxy for OpenAI, Anthropic, Google, Mistral, Cohere, and self-hosted models. Use when someone asks to "switch between LLM providers", "LiteLLM", "unified LLM API", "LLM proxy", "call Claude and GPT with the same code", "LLM load balancing", or "multi-model AI gateway". Covers provider routing, fallbacks, rate limiting, spend tracking, and self-hosted proxy.

> jwt-handler

When the user needs to generate, validate, refresh, or debug JSON Web Tokens. Use when the user mentions "JWT," "access token," "refresh token," "token rotation," "token expiration," "token validation," "bearer token," or "decode JWT." Handles secure token lifecycle including signing, verification, refresh rotation, and revocation. For full auth system design, see auth-system-setup.

> k6

When the user wants to perform load testing, stress testing, or performance testing of APIs and websites using k6. Also use when the user mentions "k6," "load test," "performance test," "stress test," "spike test," "soak test," "thresholds," "virtual users," or "VUs." For browser-based testing, see selenium.

> k8s-cost-optimizer

Analyzes Kubernetes cluster resource allocation versus actual usage to find waste and generate right-sizing recommendations. Use when someone asks about Kubernetes costs, overprovisioned pods, resource requests/limits tuning, cluster efficiency, or cloud bill reduction for K8s workloads. Trigger words: k8s costs, pod resources, right-size, overprovisioned, resource waste, cluster optimization, CPU/memory requests.

> kaboom

You are an expert in Kaboom.js (now maintained as Kaplay), the beginner-friendly game library for making browser games quickly. You help developers build games using Kaboom's component-based entity system, built-in physics, sprite loading, scene management, and event system — where games can be built in under 100 lines of code while still supporting complex gameplay through composable components.

> kafka

Build event-driven systems with Apache Kafka. Use when a user asks to set up message streaming, implement event sourcing, build pub/sub systems, process real-time data streams, or connect microservices with async messaging.

> kafka-js

You are an expert in KafkaJS, the pure JavaScript Apache Kafka client for Node.js. You help developers build event-driven architectures with producers, consumers, consumer groups, exactly-once semantics, SASL authentication, and admin operations — processing millions of events per second for real-time analytics, event sourcing, log aggregation, and microservices communication.