Letterbox for Windsurf
io.github.dovahkiin-v/letterbox
File-based comms protocol for AI-to-AI dialogue between terminal agents.
client:Windsurf
transport:stdio
runtime:pypi
Install Letterbox in Windsurf
~/.codeium/windsurf/mcp_config.json · windows: %USERPROFILE%\.codeium\windsurf\mcp_config.json
{
"mcpServers": {
"letterbox": {
"command": "uvx",
"args": [
"letterbox"
],
"env": {
"LETTERBOX_CHANNEL": "<LETTERBOX_CHANNEL>",
"LETTERBOX_SENDER": "<LETTERBOX_SENDER>",
"LETTERBOX_INSTANCE_ID": "<LETTERBOX_INSTANCE_ID>"
}
}
}
}Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs