CowAgent is a production-grade multi-agent AI assistant platform that routes messages from 12+ IM channels (WeChat, Feishu, Telegram, DingTalk, Slack, Discord, QQ, WeCom, web console, desktop Electron app) through a modular agent core. The core implements planning, tool use (bash, file editing, browser, web search, MCP, sub-agent delegation, scheduler, memory, vision), three-tier memory with vector embeddings and markdown-aware chunking, knowledge base management, skill system with SKILL.md manifests and a skill hub, self-evolution (idle-conversation review loop), and multi-agent team orchestration with peer transport. The architecture is a modular monolith: channel adapters normalize messages into a unified ChatMessage, the Bridge dispatches to per-agent/session model resolution, the Agent protocol (Task/AgentResult/AgentAction) drives the execution loop with streaming, cancellation, and steering, and all state persists to SQLite with incremental migration. Key entry points are app.py (startup orchestration), cli/cli.py (daemon lifecycle), channel/web/web_channel.py (HTTP API and SSE streaming), and the desktop Electron client (React/TypeScript with Zustand stores). External dependencies include LLM APIs (OpenAI, Claude, Gemini, DeepSeek, etc.), IM platform webhooks/SDKs, optional voice TTS/ASR providers, and MCP servers. The codebase demonstrates strong engineering practices with extensive regression tests (200+ test files), atomic file writes, thread-safe context propagation via ContextVar, and security guards for credential paths and SSRF.