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mcp/harbor
Zed

Letterbox for Zed

io.github.dovahkiin-v/letterbox

File-based comms protocol for AI-to-AI dialogue between terminal agents.

client:Zed transport:stdio runtime:pypi

Install Letterbox in Zed

~/.config/zed/settings.json · windows: %APPDATA%\Zed\settings.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "context_servers": {
    "letterbox": {
      "command": "uvx",
      "args": [
        "letterbox"
      ],
      "env": {
        "LETTERBOX_CHANNEL": "<LETTERBOX_CHANNEL>",
        "LETTERBOX_SENDER": "<LETTERBOX_SENDER>",
        "LETTERBOX_INSTANCE_ID": "<LETTERBOX_INSTANCE_ID>"
      }
    }
  }
}

Merge this into your existing settings object — do not replace the file. Zed docs

Letterbox in other clients

Letterbox MCP server