[Bug]: Compile error when Physics module is disabled (regression in 9.7.1)

[Ommand]

What happened?

After upgrading from 9.6.8 to 9.7.1, the project fails to compile with:

Library/PackageCache/com.coplaydev.unity-mcp@78ee541841/Runtime/Helpers/UnityPhysicsCompat.cs(101,47):
error CS1069: The type name 'Physics' could not be found in the namespace 'UnityEngine'.
This type has been forwarded to assembly 'UnityEngine.PhysicsModule'.
Enable the built in package 'Physics' in the Package Manager window to fix this error.

This error also appears on lines 157 and 172 of the same file.

Reproduction steps

The problem appears right after the package import

Unity version

2022.3.62f2

MCP for Unity package version

9.7.1

Python server version

No response

MCP client

Claude Desktop

Transport

HTTP (default)

OS

macOS

Relevant logs / console output

Checks

• I searched existing issues and did not find a duplicate
• I included logs / steps to reproduce

[Scriptwonder]

Is this from the latest build? We try to optimize the process by enabling some packages from the start today, this might cause an issue from earlier builds, but should be fine from the latest build. Also are you intentionally want to disable the physics? Enabling it should resolve this error.

[Ommand]

How do I check the build number? I've updated the package to 9.7.1 via Package Manager.

And yes, my project intentionally does not have the physics package installed.

[Scriptwonder]

How do I check the build number? I've updated the package to 9.7.1 via Package Manager.

And yes, my project intentionally does not have the physics package installed.

I think if you update it from UPM in the beta branch it should be the latest.
Reason behind intentionally not install it? My intention is with the current package.json it will auto-install packages for users, so we can get rid of some reflection-based codes that impose some complexities.

[Ommand]

I have no issues on 9.7.2-beta8, thanks a lot. The reason is that I build for mobile platforms, and the physics package adds a few megabytes to the build, which I’d prefer not to include.

[Ommand]

It seems that I have no issues because the physics package is now included as a dependence. That's not exactly what I intended to achieve though.

[Scriptwonder]

Any way you could build and ship it without the package (since it only results in compilation errors during editor mode, and I assume you are not shipping Unity-MCP with your game)?

[Ommand]

That is correct, but wouldn't I have to keep the package in unstaged changes forever this way? Or to remove it before the build procedure.