An open-source coding agent reference implementation from Vercel Labs. A three-layer architecture separates the web UI, agent workflow, and sandbox VM — designed as a starting point for teams that want to self-host their own Claude Code or Cursor Background Agent.
Claw Code is a from-scratch Rust rewrite of the Claude Code CLI, featuring 48K lines of code, 40 tools, and MIT licensing. Most remarkably, the entire project was built by multiple AI agents collaborating over just 5 days, surpassing 170K GitHub stars within a week of launch.
An open-source Agent Harness framework from HKUDS (HKU Data Science Lab) that implements tool calling, skill loading, memory, permissions, and multi-agent collaboration as complete infrastructure, supporting Anthropic / OpenAI / GitHub Copilot API formats.
OpenCode is a free, open-source TypeScript CLI agent (MIT, ~198K GitHub stars). It supports 75+ model providers including local Ollama, allows authentication via Copilot/ChatGPT accounts, and lets you switch models mid-session without losing context. There is also a desktop app and an official Zen gateway.
2026 Q1 saw a full-blown open-source model explosion: on the LLM front, GLM-5, Kimi K2.5, and Qwen3.5 caught up with closed-source models; Embedding and Reranker are dominated by Qwen3 and BGE; speech has Voxtral TTS and Whisper V3; image has FLUX.2; and video has Wan 2.2 rivaling Sora. This is the complete navigation map.