Line Harness Oss MCP Server

How to install Line Harness Oss

Built from the start command in the project's README: npx --yes create-line-harness@latest. Check the README for required keys or settings.

claude mcp add line-harness-oss -- npx --yes create-line-harness@latest

{
  "mcpServers": {
    "line-harness-oss": {
      "command": "npx",
      "args": [
        "--yes",
        "create-line-harness@latest"
      ]
    }
  }
}

{
  "mcpServers": {
    "line-harness-oss": {
      "command": "npx",
      "args": [
        "--yes",
        "create-line-harness@latest"
      ]
    }
  }
}

code --add-mcp '{"name":"line-harness-oss","command":"npx","args":["--yes","create-line-harness@latest"]}'

What Line Harness Oss can touch

• Seen in this scan, either in the code or while it ran.Run shell commandsFound in the code by our scan
• Seen in this scan, either in the code or while it ran.Run dynamic codeFound in the code by our scan
• Our checks did not find this. The tool may still do it.Read or write filesNot seen in this scan
• Seen in this scan, either in the code or while it ran.Read environment and secretsFound in the code by our scan
• Our checks did not find this. The tool may still do it.Control a web browserNot seen in this scan
• Our checks did not find this. The tool may still do it.Connect to databasesNot seen in this scan
• Our checks did not find this. The tool may still do it.Read or send messagesNot seen in this scan
• Our checks did not find this. The tool may still do it.Touch money or tradingNot seen in this scan
• Seen in this scan, either in the code or while it ran.Connect to the internetFound in the code by our scan

"Not seen" means our checks did not find it, and the tool may still do it. Covers commit 1c9319a, Nov 5, 2026. See the scan policy.