Home / Agent Harness / OpenCode Agent Harness OpenCode — Open-source terminal coding agent The most-starred open coding agent of 2025 — LLM-agnostic, MCP-native, built for terminal lovers. Official links opencode.ai sst/opencode OpenCode features A AI Trait Artificial Intelligence OpenCode is written in TypeScript Language JavaScript With Syntax For Types OpenCode works with OpenRouter AI as a Service One API for 400+ LLMs