Open-source framework for building AI agents on WhatsApp. Define your agent in YAML — personality, tools, routing — and run with one command. Supports multiple LLMs (Anthropic, OpenAI, Ollama), persistent memory with summarization, user profiles, multi-agent routing on a single number, built-in tools (web search, scheduling, human handoff), and cron triggers. No more glue code — just npx wa-agent init my-bot and you're live.