Vouch request: p5

[p5]

What do you want to work on?

I would like to add a GCP metadata server emulator for GCP SDK credential discovery in sandboxes.

Why this change?

Anybody who is currently attempting to call non-inference GCP APIs (such as Drive, Maps, Search etc) are unable to without passing in credentials to the sandbox. A recent PR added support for refreshing google service account credentials (#1349) and my change will be wiring it up such that the SDK can create d credentials from our mock metadata service, which are swapped out for real credentials in the proxy as usual.

I have an early implementation in an existing branch available here but am continuing to iterate.

This could also be used as an alternate method for invoking inference APIs if the user wishes, though will remain undocumented as to avoid confusion with the existing inference.local approach.

Checklist

• I wrote this request myself (not AI-generated)
• I have read CONTRIBUTING.md

[johntmyers]

/vouch

[github-actions[bot]]

@p5 has been vouched by @johntmyers.

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