robrain

robrain is a local MCP server: Self-hosted decision memory for AI coding agents; warns before re-proposing a rejected approach. Install it from npm as robrain.

Claude CodeCodexAntigravity

commandprompt

Terminal

claude mcp add robrain -e PERCEPTION_API_URL=... -e PERCEPTION_API_KEY=... -- npx -y robrain

Run in your project folder. Add --scope user to use it everywhere.

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "robrain": {
      "command": "npx",
      "args": [
        "-y",
        "robrain"
      ],
      "env": {
        "PERCEPTION_API_URL": "...",
        "PERCEPTION_API_KEY": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

• Runtime: Node.js 18+ (runs with npx).
• MCP client: Claude Code, Codex, Antigravity, Claude Desktop, Cursor or any other client that speaks MCP over stdio.
• Environment variables: PERCEPTION_API_URL, PERCEPTION_API_KEY