🔴 Bug: MCP read_repomix_output always take the entire xml file

[Nxtivision]

Description

Hello !

I'm using the MCP server inside Cursor AI to pack and read my repo, in order to create at the end a complete solution for other developers to have access instantly to key information of our Design System.

⚠️ It's a blocking issue since we can't use properly the MCP server with Repomix ⚠️

The packing and the search work fine, however, when it comes to use the read_repomix_output, it breaks my context used.

After some deep dive, here are my observations:

Parameters used by Cursor

{
  "outputId": "fbb7981a4debbdb5",
  "start_line": "943",
  "end_line": "1003"
}

As we can see, start and end are in string

Result

{
  "content": "...",
  "totalLines":23709,
  "linesRead":23709,
  "startLine":1,
  "endLine":23709
}

Using MCP Inspector

I did the same work on the MCP Inspector, and the result are different:

parameters sent

{
  "params": {
    "name": "read_repomix_output"
    "arguments": {
      "outputId": "82de6aeec5e23dc6"
      "startLine": 943
      "endLine": 1003
  }
}

result

{
  "content": "...",
  "totalLines": 23709,
  "linesRead": 61,
  "startLine": 943,
  "endLine": 1003
}

Conclusion

It seems the fact that Cursor is sending the parameters in String are breaking the code. Zod seems to be the best option, maybe we need to use coerce to be sure the result is passed in correctly?

Usage Context

Repomix CLI

Repomix Version

1.5.0

Node.js Version

24.3.0

[yamadashy]

Hi, @Nxtivision !
Thank you for the detailed report and investigation!

In my environment, passing strings causes an error, but there might be some edge cases where it slips through. Since we're already using Zod for validation, I'll update it to coerce strings to integers when they're provided.

I'll implement the fix using z.coerce.number() as you suggested.

[Nxtivision]

Great! Waiting for the next release to try it 😄

[yamadashy]

@Nxtivision
Sorry for the late response! I've released the fix in version 1.6.0, so please give it a try when you have time!
https://github.com/yamadashy/repomix/releases/tag/v1.6.0