fix(google): omit unsupported numberOfVideos in Veo requests (openclaw#64723)

Merged via squash.

Prepared head SHA: dadfd33
Co-authored-by: velvet-shark <126378+velvet-shark@users.noreply.github.com>
Co-authored-by: velvet-shark <126378+velvet-shark@users.noreply.github.com>
Reviewed-by: @velvet-shark

Author: velvet-shark

CHANGELOG.md

@@ -13,6 +13,7 @@ Docs: https://docs.openclaw.ai
 - Control UI/webchat: persist agent-run TTS audio replies into webchat history before finalization so tool-generated audio reaches webchat clients again. (#63514) thanks @bittoby
 - macOS/Talk Mode: after granting microphone permission on first enable, continue starting Talk Mode instead of requiring a second toggle. (#62459) Thanks @ggarber.
 - OpenAI/Codex OAuth: stop rewriting the upstream authorize URL scopes so new Codex sign-ins do not fail with `invalid_scope` before returning an authorization code. (#64713) Thanks @fuller-stack-dev.
+- Google/Veo: stop sending the unsupported `numberOfVideos` request field so Gemini Developer API Veo runs do not fail before OpenClaw can complete the intended Google video generation path. (#64723) thanks @velvet-shark
 
 ## 2026.4.10
 

extensions/google/video-generation-provider.test.ts

@@ -67,19 +67,21 @@ describe("google video generation provider", () => {
       audio: true,
     });
 
-    expect(generateVideosMock).toHaveBeenCalledWith(
+    expect(generateVideosMock).toHaveBeenCalledTimes(1);
+    const [request] = generateVideosMock.mock.calls[0] ?? [];
+    expect(request).toEqual(
       expect.objectContaining({
         model: "veo-3.1-fast-generate-preview",
         prompt: "A tiny robot watering a windowsill garden",
         config: expect.objectContaining({
-          numberOfVideos: 1,
           durationSeconds: 4,
           aspectRatio: "16:9",
           resolution: "720p",
           generateAudio: true,
         }),
       }),
     );
+    expect(request?.config).not.toHaveProperty("numberOfVideos");
     expect(result.videos).toHaveLength(1);
     expect(result.videos[0]?.mimeType).toBe("video/mp4");
     expect(GoogleGenAIMock).toHaveBeenCalledWith(

extensions/google/video-generation-provider.ts

@@ -238,7 +238,6 @@ export function buildGoogleVideoGenerationProvider(): VideoGenerationProvider {
         image: resolveInputImage(req),
         video: resolveInputVideo(req),
         config: {
-          numberOfVideos: 1,
           ...(typeof durationSeconds === "number" ? { durationSeconds } : {}),
           ...(resolveAspectRatio({ aspectRatio: req.aspectRatio, size: req.size })
             ? { aspectRatio: resolveAspectRatio({ aspectRatio: req.aspectRatio, size: req.size }) }