@otto-assistant/opencode-cursor-oauth

High-quality OpenCode provider plugin that brings Cursor models into OpenCode through OAuth, model discovery, and a local OpenAI-compatible proxy.

Designed for real-world agent usage: streaming, tool calls, long conversations, and robust continuation behavior.

Highlights

• OAuth login with automatic token refresh
• Cursor model discovery directly from API
• OpenAI-compatible /v1/chat/completions proxy for OpenCode runtime compatibility
• Stable streaming with tool-calling continuation
• MCP-first tool execution flow for practical agent environments
• Conversation-state handling built for long and tool-heavy sessions
• Production-ready smoke test coverage

Why teams use it

• Native feel in OpenCode: Cursor models are exposed as a regular provider flow in OpenCode.
• Reliable tool loops: Tool call handoff and continuation are engineered for iterative agent workflows.
• Operationally practical: Focused on reducing common runtime failure modes around streaming, tool calls, and conversation state.
• Simple integration surface: Works with standard OpenCode plugin configuration and auth flow.

Installation

Option A: Install from npm (recommended)

npm install -g @otto-assistant/opencode-cursor-oauth

Then add this to ~/.config/opencode/opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    "@otto-assistant/opencode-cursor-oauth"
  ],
  "provider": {
    "cursor": {
      "name": "Cursor"
    }
  }
}

Option B: Install from repository source

git clone https://github.com/otto-assistant/opencode-cursor.git
cd opencode-cursor
bun install
bun run build
npm install -g .

Use the same OpenCode config shown above.

Authentication

opencode auth login --provider cursor

This opens Cursor OAuth in your browser. Tokens are stored in ~/.local/share/opencode/auth.json and refreshed automatically.

Quick usage

1. Start OpenCode.
2. Select provider cursor.
3. Choose a Cursor model.
4. Send prompts as usual; the plugin starts the local proxy on demand.

Architecture

OpenCode
  -> /v1/chat/completions
  -> Bun.serve proxy
  -> Node HTTP/2 bridge (h2-bridge.mjs)
  -> Cursor gRPC API (api2.cursor.sh)

Tool-call lifecycle

1) Model receives tool definitions via request context
2) Model emits tool call
3) Proxy maps tool call into OpenCode-compatible stream events
4) OpenCode executes tool
5) Tool result is sent back
6) Proxy resumes Cursor stream continuation

Development

bun install
bun run build
bun run test

Compatibility

• OpenCode plugin runtime
• Bun runtime
• Node.js >= 18 (HTTP/2 bridge process)
• Active Cursor subscription

Performance and reliability notes

• Conversation state is managed to support continuation across multi-turn tool usage.
• Streaming and bridge lifecycle handling are designed to minimize stuck sessions.
• Tool execution path is optimized for MCP-based environments.

FAQ

Do I need to clone the repository to use this plugin?

Usually no. OpenCode can install npm plugins automatically when configured.

Is this package published on npm?

This repository publishes under @otto-assistant/opencode-cursor-oauth. If npm install fails, verify that the latest GitHub release workflow completed successfully.

Where is the license?

This project is released under the MIT license (declared in package metadata).

License

MIT