fix(agents): detect Venice provider proxying xAI/Grok models for schema cleaning (#35355)

Merged via squash.

Prepared head SHA: 8bfdec257b
Co-authored-by: Sid-Qin <201593046+Sid-Qin@users.noreply.github.com>
Co-authored-by: shakkernerd <165377636+shakkernerd@users.noreply.github.com>
Reviewed-by: @shakkernerd

src/agents/schema/clean-for-xai.test.ts

@@ -29,6 +29,18 @@ describe("isXaiProvider", () => {
   it("handles undefined provider", () => {
     expect(isXaiProvider(undefined)).toBe(false);
   });
+
+  it("matches venice provider with grok model id", () => {
+    expect(isXaiProvider("venice", "grok-4.1-fast")).toBe(true);
+  });
+
+  it("matches venice provider with venice/ prefixed grok model id", () => {
+    expect(isXaiProvider("venice", "venice/grok-4.1-fast")).toBe(true);
+  });
+
+  it("does not match venice provider with non-grok model id", () => {
+    expect(isXaiProvider("venice", "llama-3.3-70b")).toBe(false);
+  });
 });
 
 describe("stripXaiUnsupportedKeywords", () => {

src/agents/schema/clean-for-xai.ts

@@ -48,8 +48,13 @@ export function isXaiProvider(modelProvider?: string, modelId?: string): boolean
   if (provider.includes("xai") || provider.includes("x-ai")) {
     return true;
   }
+  const lowerModelId = modelId?.toLowerCase() ?? "";
   // OpenRouter proxies to xAI when the model id starts with "x-ai/"
-  if (provider === "openrouter" && modelId?.toLowerCase().startsWith("x-ai/")) {
+  if (provider === "openrouter" && lowerModelId.startsWith("x-ai/")) {
+    return true;
+  }
+  // Venice proxies to xAI/Grok models
+  if (provider === "venice" && lowerModelId.includes("grok")) {
     return true;
   }
   return false;