Cheatsheets

Major Browsers, Engines, Privacy & Security

Quick reference to the 2026 web browser landscape - market share, engines (Blink, WebKit, Gecko), performance, privacy, extension risks, and a decision table for picking the right browser.

Real-Time Voice & Multimodal AI

Complete quick reference for LiveKit Agents - architecture, chained vs realtime pipelines, STT/LLM/TTS integrations, tools, workflows, turn detection, and deployment.

Models, Voices, API & Agents

Current quick reference for ElevenLabs models, voice cloning, streaming, API usage, and platform updates.

W3C Browser AI Tool API Reference

Complete quick reference for the W3C WebMCP browser API - register JavaScript functions as AI-callable tools with full IDL, code examples, and security guidance.

Headless Chrome & Firefox Automation

Complete quick reference for Puppeteer v24 - Browser/Context/Page hierarchy, modern Locator API with pseudo-selectors, request interception, BiDi, and Docker production patterns.

End-to-End Testing & Browser Automation

Complete quick reference for Playwright - Browser/Context/Page/Locator primitives, locator strategies, web-first assertions, Codegen, Trace Viewer, language bindings, and best practices.

LLM Agents, Tools, RAG & Models

Complete quick reference for LangChain - init_chat_model universal interface, @tool decorator, create_agent with memory and structured output, and full RAG pipeline.

Model Context Protocol Reference

Complete quick reference for the Model Context Protocol - architecture, primitives (Tools, Resources, Prompts), JSON-RPC transport, security best practices, and ecosystem overview.

SKILL.md Spec & Authoring Reference

Complete quick reference for Agent Skills - SKILL.md spec, progressive disclosure, directory conventions, authoring patterns, scripts, description optimization, output-quality evals, and client integration.