From 1e8df88fc7a8a47c84c79fa4bfe891a1044162d5 Mon Sep 17 00:00:00 2001
From: Kit Langton <kit.langton@gmail.com>
Date: Fri, 5 Jun 2026 14:40:07 -0400
Subject: [PATCH] fix(core): scope Vertex provider transforms

---
 .../core/src/plugin/provider/google-vertex.ts |  5 ++++-
 .../plugin/provider-google-vertex.test.ts     | 21 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/plugin/provider/google-vertex.ts b/packages/core/src/plugin/provider/google-vertex.ts
index d996a1f24e0e..a7168d59add7 100644
--- a/packages/core/src/plugin/provider/google-vertex.ts
+++ b/packages/core/src/plugin/provider/google-vertex.ts
@@ -63,7 +63,10 @@ export const GoogleVertexPlugin = PluginV2.define({
           if (item.provider.api.type !== "aisdk") continue
           if (
             item.provider.api.package !== "@ai-sdk/google-vertex" &&
-            !item.provider.api.package.includes("@ai-sdk/openai-compatible")
+            !(
+              item.provider.id === ProviderV2.ID.googleVertex &&
+              item.provider.api.package.includes("@ai-sdk/openai-compatible")
+            )
           )
             continue
           const project = resolveProject(item.provider.request.body)
diff --git a/packages/core/test/plugin/provider-google-vertex.test.ts b/packages/core/test/plugin/provider-google-vertex.test.ts
index f0e8cd74200a..cb23cc452cd5 100644
--- a/packages/core/test/plugin/provider-google-vertex.test.ts
+++ b/packages/core/test/plugin/provider-google-vertex.test.ts
@@ -35,6 +35,27 @@ void mock.module("google-auth-library", () => ({
 }))
 
 describe("GoogleVertexPlugin", () => {
+  it.effect("ignores OpenAI-compatible providers that are not Google Vertex", () =>
+    Effect.gen(function* () {
+      const plugin = yield* PluginV2.Service
+      const catalog = yield* Catalog.Service
+      yield* plugin.add(GoogleVertexPlugin)
+      const transform = yield* catalog.transform()
+      yield* transform((catalog) =>
+        catalog.provider.update(ProviderV2.ID.opencode, (provider) => {
+          provider.api = {
+            type: "aisdk",
+            package: "@ai-sdk/openai-compatible",
+            url: "https://opencode.ai/zen/v1",
+          }
+        }),
+      )
+
+      const provider = yield* catalog.provider.get(ProviderV2.ID.opencode)
+      expect(provider.request.body).toEqual({})
+    }),
+  )
+
   it.effect("resolves project and location from env using legacy precedence", () =>
     withEnv(
       {