Browse skills

Design and implement caching layers for APIs and web applications using Redis or Memcached. Use when you need to reduce database load, improve response times, or handle traffic spikes. Covers cache-aside, write-through, and write-behind patterns, TTL strategies, cache invalidation, and stampede prevention. Trigger words: cache, Redis, Memcached, TTL, cache invalidation, response time, throughput, rate limiting.

Expert guidance for Cal.com, the open-source scheduling platform for building booking and appointment systems. Helps developers integrate Cal.com's embed widgets, REST API, and webhooks to add scheduling capabilities to their applications.

Collect and manage product feedback with Canny. Use when a user asks to set up a feature request board, prioritize product feedback, build a public roadmap, or let users vote on features.

Turn web apps into native mobile apps with Capacitor — access native device APIs from JavaScript. Use when someone asks to "convert my website to a mobile app", "Capacitor", "web to native app", "access camera from JavaScript", "deploy web app to App Store", "hybrid mobile app", or "Ionic Capacitor". Covers native API access, plugin system, web-to-native bridge, and app store deployment.

Expert guidance for CapRover, the open-source PaaS that turns any Linux server into a Heroku-like platform with automatic HTTPS, one-click app deployment, and Docker-based containerization. Helps developers deploy applications, configure custom domains, and manage the CapRover cluster.

Bridge local AI coding agents (Claude Code, Cursor, Gemini CLI, Codex) to messaging platforms (Slack, Telegram, Discord). Use when: controlling AI agents from team chat, sending coding tasks via Slack/Telegram, building team-accessible AI workflows.

Run background tasks in Python with Celery. Use when a user asks to process tasks asynchronously, schedule periodic jobs, run background workers, build task queues in Python, or offload heavy processing from web requests.

You are an expert in Centrifugo, the scalable real-time messaging server. You help developers add WebSocket-based real-time features (chat, notifications, live updates, presence) to any application with a language-agnostic server that handles millions of concurrent connections — publishing from your backend via HTTP/gRPC API while clients subscribe via WebSocket, SSE, or HTTP streaming.

cert-manager for automatic TLS certificate management in Kubernetes. Use when the user needs to issue, renew, and manage TLS certificates from Let's Encrypt or other CAs, configure ClusterIssuers, and secure Ingress resources.

Extract text from complex documents using Chandra OCR — handles tables, forms, handwriting, and full page layouts with high accuracy. Use when: extracting data from scanned documents, reading complex tables from PDFs/images, processing handwritten forms.

Self-host customer support with Chatwoot. Use when a user asks to set up open-source customer support, add live chat without SaaS costs, build a multi-channel inbox, or deploy a free Intercom alternative.

Use when analyzing code quality

You are an expert in BullMQ, the high-performance job queue for Node.js built on Redis. You help developers build reliable background processing systems with delayed jobs, rate limiting, prioritization, repeatable cron jobs, job dependencies, concurrency control, and dead-letter handling — powering email sending, image processing, webhook delivery, report generation, and any async workload.

Assists with using Bun as an all-in-one JavaScript/TypeScript runtime, package manager, bundler, and test runner. Use when building HTTP servers, managing packages, running tests, or migrating from Node.js. Trigger words: bun, bun serve, bun install, bun test, bun build, javascript runtime, bun runtime.

Understand essential business finance — profit margins, unit economics, cash flow, LTV/CAC, and the 4 methods to increase revenue. Use when: analyzing business profitability, making pricing decisions, evaluating SaaS unit economics, financial planning.

Configure Caddy as a web server and reverse proxy — automatic HTTPS, reverse proxy, load balancing, file server, redirects, headers, rate limiting, and API configuration. Use when tasks involve serving websites, proxying to backend services, automatic TLS certificate management, or replacing Nginx with a simpler configuration.

Integrate with Google Calendar and Microsoft Outlook Calendar for scheduling, event management, and availability tracking. Use when someone asks to "create calendar events", "check availability", "schedule meetings", "sync calendars", "Google Calendar API", "Outlook Calendar API", "booking system", "find free slots", or "manage recurring events". Covers Google Calendar API v3, Microsoft Graph Calendar API, event CRUD, availability/free-busy queries, recurring events, and building scheduling features.

Draw 2D graphics with the HTML5 Canvas API — shapes, text, images, gradients, transformations, pixel manipulation, and offscreen rendering. Use when tasks involve generating images server-side (with node-canvas), creating charts, image compositing, watermarking, or browser-based drawing applications.

Translates performance test results into infrastructure scaling recommendations with cost estimates. Use when someone has load test data and needs to know what infrastructure changes are required to handle target traffic. Trigger words: capacity planning, scaling plan, infrastructure sizing, how many pods, RDS sizing, handle more traffic, scale for launch.

Apache Cassandra is a distributed NoSQL database designed for high availability and linear scalability. Learn CQL (Cassandra Query Language), data modeling with partition keys, replication strategies, and integration with Node.js using the DataStax driver.