[BUG] Vertex AI: missing eu/us multi-region endpoints in region dropdown

[mwielgosz-esky]

Problem (one or two sentences)

The Vertex AI provider region dropdown does not include eu and us multi-region endpoints for Anthropic Claude models. These are valid GCP locations documented at https://cloud.google.com/vertex-ai/generative-ai/docs/partner-models/use-claude#regions.

Context (who is affected and when)

Users who need multi-region Vertex AI endpoints (eu/us) for data residency or geographic routing cannot select them in the Zoo Code UI. I am currently using Zoo Code and the problem still occurs there.

Reproduction steps

1. Open Zoo Code settings
2. Select "Google Vertex AI" as API provider
3. Choose model claude-opus-4-7
4. Open the "Google Cloud Region" dropdown
5. Search for eu or us multi-region options — they are not present

Expected result

eu and us multi-region endpoints should be available in the dropdown alongside global and specific regions (e.g. us-east5).

Actual result

Only global and specific regional endpoints are listed; eu and us multi-region are missing.

Variations tried (optional)

Verified locally on Zoo Code v3.54.1 by inspecting the bundled webview assets: global, us-east5, and europe-west1 are present in the region dropdown, but standalone eu and us entries are absent.

Verified in the current GitHub source as well: packages/types/src/providers/vertex.ts contains claude-opus-4-7 in Vertex model definitions and VERTEX_REGIONS includes global plus many single regions, but does not include eu or us multi-region entries.

Verified via curl that aiplatform.googleapis.com/v1/projects/.../locations/eu/... and .../locations/us/... resolve correctly (HTTP 200).

This issue was previously filed in the archived Roo Code repo as RooCodeInc/Roo-Code#12320 and is being migrated because Zoo Code is the active continuation referenced by the archived project README.

App Version

v3.54.1

API Provider

Google Vertex AI

Model Used

claude-opus-4-7

[roomote]

A fix is up in draft PR #170 and adds the missing us and eu multi-region Vertex AI endpoints to the settings dropdown.

If you're able to test it, please confirm whether that change resolves the issue for your Vertex AI setup.

[roomote]

Closing this because the missing / Vertex AI multi-region endpoints were fixed in PR #170, which has already merged into . Please reopen if you still see the region dropdown missing those entries on a current build.