Part 14 — Surfaces beyond the terminal
The same harness runs behind each surface — models feel consistent because the tool layer is shared (Codex parallel: one harness, many clients).
Part 15 — SDK, Server, and Plugins
For builders extending OpenCode:
-
SDK — programmatic access to the agent harness
-
Server — run OpenCode as a service that other clients attach to
-
Plugins — extend behavior without forking core
-
Ecosystem — community projects (docs)
If you ship a derivative project, OpenCode asks you to clarify in README that it is not official — see upstream CONTRIBUTING.
Part 16 — OpenCode in the agent landscape
vs Claude Code: Both are coding harnesses. Claude Code is Anthropic-native with deep IDE integration; OpenCode is provider-neutral and terminal-first with open source transparency.
vs OpenClaw: OpenClaw is a personal assistant gateway (Telegram, WhatsApp, cron). OpenCode is a repo coding agent. Many teams use both — OpenClaw for life ops, OpenCode for shipping code. See OpenClaw masterclass
vs ZeroClaw: ZeroClaw is a Rust multi-channel runtime with security policy and hardware hooks. OpenCode optimizes for developer UX in git repos. See ZeroClaw masterclass.
Harness link: OpenCode embodies Harness Engineering — AGENTS.md, permissions, verification via LSP/tests, and scoped Plan mode.
Part 17 — Troubleshooting
Part 18 — Hands-on checklist
curl -fsSL https://opencode.ai/install | bash
cd your-repo && opencode
/connect
/init && git add AGENTS.md && git commit -m "Add OpenCode AGENTS.md"
# Tab → Plan → describe feature → Tab → Build → implement
/share # optional — link for teammate
Summary
OpenCode is a production-grade coding agent harness : provider-flexible, LSP-aware, MCP-ready, with Plan/Build agent modes and first-class AGENTS.md initialization. Install once, /connect, /init, and treat the TUI as mission control for your repo — not a chat sidebar.
The model writes the code. The harness decides what it’s allowed to touch, what it sees, and when "done" means done.
Thank you so much for reading
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