No prompt limits. No broken streams. Full thinking + tool support in OpenCode. Your Cursor subscription, properly integrated.

Installation

Option A — One-line installer

curl -fsSL https://raw.githubusercontent.com/Nomadcxx/opencode-cursor/main/install.sh | bash

Option B — Add to opencode.json

Add to ~/.config/opencode/opencode.json:

{
  "plugin": ["@rama_nigg/open-cursor@latest"],
  "provider": {
    "cursor-acp": {
      "name": "Cursor ACP",
      "npm": "@ai-sdk/openai-compatible",
      "models": {
        "cursor-acp/auto": { "name": "Auto" },
        "cursor-acp/composer-1.5": { "name": "Composer 1.5" },
        "cursor-acp/composer-1": { "name": "Composer 1" },
        "cursor-acp/gpt-5.3-codex": { "name": "GPT-5.3 Codex" },
        "cursor-acp/gpt-5.3-codex-low": { "name": "GPT-5.3 Codex Low" },
        "cursor-acp/gpt-5.3-codex-high": { "name": "GPT-5.3 Codex High" },
        "cursor-acp/gpt-5.3-codex-xhigh": { "name": "GPT-5.3 Codex Extra High" },
        "cursor-acp/gpt-5.3-codex-fast": { "name": "GPT-5.3 Codex Fast" },
        "cursor-acp/gpt-5.3-codex-low-fast": { "name": "GPT-5.3 Codex Low Fast" },
        "cursor-acp/gpt-5.3-codex-high-fast": { "name": "GPT-5.3 Codex High Fast" },
        "cursor-acp/gpt-5.3-codex-xhigh-fast": { "name": "GPT-5.3 Codex Extra High Fast" },
        "cursor-acp/gpt-5.2": { "name": "GPT-5.2" },
        "cursor-acp/gpt-5.2-codex": { "name": "GPT-5.2 Codex" },
        "cursor-acp/gpt-5.2-codex-high": { "name": "GPT-5.2 Codex High" },
        "cursor-acp/gpt-5.2-codex-low": { "name": "GPT-5.2 Codex Low" },
        "cursor-acp/gpt-5.2-codex-xhigh": { "name": "GPT-5.2 Codex Extra High" },
        "cursor-acp/gpt-5.2-codex-fast": { "name": "GPT-5.2 Codex Fast" },
        "cursor-acp/gpt-5.2-codex-high-fast": { "name": "GPT-5.2 Codex High Fast" },
        "cursor-acp/gpt-5.2-codex-low-fast": { "name": "GPT-5.2 Codex Low Fast" },
        "cursor-acp/gpt-5.2-codex-xhigh-fast": { "name": "GPT-5.2 Codex Extra High Fast" },
        "cursor-acp/gpt-5.1-codex-max": { "name": "GPT-5.1 Codex Max" },
        "cursor-acp/gpt-5.1-codex-max-high": { "name": "GPT-5.1 Codex Max High" },
        "cursor-acp/opus-4.6-thinking": { "name": "Claude 4.6 Opus (Thinking)" },
        "cursor-acp/sonnet-4.5-thinking": { "name": "Claude 4.5 Sonnet (Thinking)" },
        "cursor-acp/gpt-5.2-high": { "name": "GPT-5.2 High" },
        "cursor-acp/opus-4.6": { "name": "Claude 4.6 Opus" },
        "cursor-acp/opus-4.5": { "name": "Claude 4.5 Opus" },
        "cursor-acp/opus-4.5-thinking": { "name": "Claude 4.5 Opus (Thinking)" },
        "cursor-acp/sonnet-4.5": { "name": "Claude 4.5 Sonnet" },
        "cursor-acp/gpt-5.1-high": { "name": "GPT-5.1 High" },
        "cursor-acp/gemini-3-pro": { "name": "Gemini 3 Pro" },
        "cursor-acp/gemini-3-flash": { "name": "Gemini 3 Flash" },
        "cursor-acp/grok": { "name": "Grok" }
      }
    }
  }
}

Update models anytime: cursor-agent models

Option C — npm global + CLI

npm install -g @rama_nigg/open-cursor
open-cursor install

Upgrade: npm update -g @rama_nigg/open-cursor

Option D — Go TUI installer

git clone https://github.com/Nomadcxx/opencode-cursor.git
cd opencode-cursor
go build -o ./installer ./cmd/installer && ./installer

Option E — LLM paste

Install open-cursor for OpenCode: edit ~/.config/opencode/opencode.json, add "@rama_nigg/open-cursor@latest" to "plugin", add a "cursor-acp" provider with npm "@ai-sdk/openai-compatible" and models from `cursor-agent models` prefixed with "cursor-acp/". Auth: `cursor-agent login`. Verify: `opencode models | grep cursor-acp`.

Option F — Manual (from source)

git clone https://github.com/Nomadcxx/opencode-cursor.git && cd opencode-cursor
bun install && bun run build
ln -sf $(pwd)/dist/plugin-entry.js ~/.config/opencode/plugin/cursor-acp.js
./scripts/sync-models.sh

Add "cursor-acp" to the plugin array and reuse the provider block from Option B.

Authentication

opencode auth login   # provider id: cursor-acp
cursor-agent login    # direct

Usage

opencode run "your prompt" --model cursor-acp/auto
opencode run "your prompt" --model cursor-acp/sonnet-4.5

Architecture

flowchart TB
    OC["OpenCode"] --> SDK["@ai-sdk/openai-compatible"]
    SDK -->|"POST /v1/chat/completions"| PROXY["open-cursor proxy :32124"]
    PROXY -->|"spawn per request"| AGENT["cursor-agent --output-format stream-json"]
    AGENT -->|"HTTPS"| CURSOR["Cursor API"]
    CURSOR --> AGENT

    AGENT -->|"assistant / thinking events"| SSE["SSE content chunks"]
    AGENT -->|"tool_call event"| BOUNDARY["Provider boundary (v1 default)"]
    BOUNDARY --> COMPAT["Schema compat + alias normalization"]
    COMPAT --> GUARD["Tool-loop guard"]
    GUARD -->|"emit tool_calls + finish_reason=tool_calls"| SDK
    SDK --> OC

    OC -->|"execute tool locally"| TOOLRUN["OpenCode tool runtime"]
    TOOLRUN -->|"next request includes role:tool result"| SDK
    SDK -->|"TOOL_RESULT prompt block"| AGENT

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Default mode: CURSOR_ACP_TOOL_LOOP_MODE=opencode. Legacy proxy-exec still available. Details: docs/architecture/runtime-tool-loop.md.

Alternatives

	open-cursor	yet-another-opencode-cursor-auth	opencode-cursor-auth	cursor-opencode-auth
Architecture	HTTP proxy via cursor-agent	Direct Connect-RPC	HTTP proxy via cursor-agent	Direct Connect-RPC/protobuf
Platform	Linux, macOS	Linux, macOS	Linux, macOS	macOS only (Keychain)
Max Prompt	Unlimited (HTTP body)	Unknown	~128KB (ARG_MAX)	Unknown
Streaming	✓ SSE	✓ SSE	Undocumented	✓
Error Parsing	✓ (quota/auth/model)	✗	✗	Debug logging
Installer	✓ TUI + one-liner	✗	✗	✗
OAuth Flow	✓ OpenCode integration	✓ Native	Browser login	Keychain
Tool Calling	✓ OpenCode-owned loop + proxy-exec	✓ Native	✓ Experimental	✗
Stability	Stable (uses official CLI)	Experimental	Stable	Experimental
Dependencies	bun, cursor-agent	npm	bun, cursor-agent	Node.js 18+
Port	32124	18741	32123	4141

Troubleshooting

• fetch() URL is invalid → opencode auth login
• Model not responding → cursor-agent login
• Quota exceeded → cursor.com/settings
• Auth failed → CURSOR_ACP_LOG_LEVEL=debug opencode auth login cursor-acp

Debug logging: CURSOR_ACP_LOG_LEVEL=debug opencode run "your prompt" --model cursor-acp/auto

Roadmap

flowchart LR
    P1[/Stabilise/] --> P2[/MCP Server/] --> P3[/Simplify/] --> P4[/ACP + MCP/]
    
    style P1 fill:#264653,stroke:#1d3557,color:#fff
    style P2 fill:#264653,stroke:#1d3557,color:#fff
    style P3 fill:#495057,stroke:#343a40,color:#adb5bd
    style P4 fill:#495057,stroke:#343a40,color:#adb5bd

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[X] Stabilise — Clean up dead code, fix test isolation
[ ] MCP Server — Expose OpenCode tools via stdio transport
[ ] Simplify — Rip out serialisation layers
[ ] ACP + MCP — Structured protocols end-to-end

License

BSD-3-Clause