Github-hosted agents struggle due to missing LFS

[basilevs]

AI agents are confused by LFS test links and have to investigate them in every session:

Ah, the .so files are ASCII text, not binary ELF files! They're likely Git LFS pointers or some kind of placeholder. That's why they fail with "invalid ELF header".I need to build the native libraries from source. Let me try the native build:

Would it be better to enable LFS support, if the repository is using LFS?

https://github.com/eclipse-platform/eclipse.platform.swt/blame/cf3719499a6732cfcb91587bc0aefc04b5a85e35/.github/workflows/copilot-setup-steps.yml#L18-L21

      - name: Checkout code
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          lfs: false # why?

[HannesWell]

Would it be better to enable LFS support, if the repository is using LFS?

Unfortunately the git-lfs fetch bandwidth is limited:
https://docs.github.com/en/billing/concepts/product-billing/git-lfs

Therefore fetching should be avoided if not really necessary. And in github workflows or agents, the natives can can be build from scratch (for free and little overhead) easier than on developer machines. Developers should be be favored when it comes to the usage of the lfs bandwidth.

AI agents are confused by LFS test links and have to investigate them in every session:

Ah, the .so files are ASCII text, not binary ELF files! They're likely Git LFS pointers or some kind of placeholder. That's why they fail with "invalid ELF header".I need to build the native libraries from source. Let me try the native build:

Instead of just fetching lfs objects, I suggest to explain the situation in the AGENTS.md file better and guide AIs what to do.
In general you have to pay great attention what AI suggests you, especially with the setup of SWT as it seems to get confused easily about many aspects (and can give you false suggestions):

• Fix copilot agents setup #3198

[HannesWell]

@basilevs I considered this for the general documentation of the LFS usage in

• Document Git Large File Storage usage in SWT #3272

Please have a look.