fix: missing extension directory prefix in 'mcp_config' of python

[ljunb]

It seems that the extension directory prefix is missing in the mcp_config field for the python type.

I ran dxt init to generate a manifest.json, and then opened it in Claude Desktop after running dxt pack. Unfortunately, I encountered the following error:

ModuleNotFoundError: No module named 'fastmcp'

The generated mcp_config was:

"mcp_config": {
  "command": "python",
  "args": [
    "${__dirname}/time_server.py"
  ],
  "env": {
    "PYTHONPATH": "server/lib"
  }
}

After some testing and cross-checking with python example, I found that the correct configuration should be:

"mcp_config": {
  "command": "python",
  "args": [
    "${__dirname}/time_server.py"
  ],
  "env": {
    "PYTHONPATH": "${__dirname}/server/lib" // modify here
  }
}

Let me know if this is something you'd like to address—I’d be happy to help improve it.

[felixrieseberg]

Wonderful, thank you!