What happened?

Description
I am using the gemini-cli with 4diac files. The file extension .adp refers to "Adapter Type" definitions, which are plain XML text files. https://github.com/eclipse-4diac/4diac-ide/blob/release/data/typelibrary/events-3.0.0/typelib/ATimeOut.adp
However, the CLI seems to automatically detect .adp as an audio format (likely Active Streaming Format) and attempts to treat it as binary.

Steps to Reproduce

1. Have a text-based file named test.adp in the directory (valid XML content).
2. Run gemini and ask a question about this file.
3. The process fails with an API error.

Observed Output
The API returns a 400 INVALID_ARGUMENT error.
Debug logs show the request fails because the CLI is likely streaming binary data (or declaring an audio mime-type) to an endpoint expecting text.

Workaround
Renaming the file from .adp to .xml fixes the issue immediately, and Gemini can read the file correctly.

Suggested Fix
Please update the mime-type detection to treat .adp as text/xml or allow a mechanism to override mime-type detection for specific extensions.

What did you expect to happen?

I expected the CLI to recognize the .adp file as text/XML (since it contains plain XML content) and process it normally, instead of treating it as binary audio and failing with an error.

Client information

> /about
# paste output here
│ About Gemini CLI                                                                                                     │
│                                                                                                                      │
│ CLI Version                              0.24.0                                                                      │
│ Git Commit                               48ee9bb30                                                                   │
│ Model                                    auto-gemini-3                                                               │
│ Sandbox                                  no sandbox                                                                  │
│ OS                                       win32                                                                       │
│ Auth Method                              OAuth                                                                       │
│ User Email                               <mine>   

Login information

Google Account

Anything else we need to know?

Context:
The .adp files are standard XML files used in Eclipse 4diac (Industrial Automation) to define "Adapter Types". They are not audio files.

Debug Info:
The API consistently returns a 400 INVALID_ARGUMENT error, indicating a mismatch between the sent content type (likely binary/audio) and the actual content needed by the model.

Error Snippet:

{
  "error": {
    "code": 400,
    "message": "Request contains an invalid argument.",
    "status": "INVALID_ARGUMENT"
  }
}