fix(hub): default to OpenRouter Sonnet model

hub/test/unit/default-models.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from "vitest";
+import { createDefaultModelRegistry } from "../../src/agent/defaultModels.js";
+
+describe("default model registry", () => {
+  it("uses OpenRouter model slugs for Sonnet defaults", () => {
+    const models = createDefaultModelRegistry({});
+
+    expect(models.listModels()[0]).toMatchObject({
+      id: "anthropic/claude-sonnet-5",
+      label: "Claude Sonnet 5",
+      toolCapable: true,
+    });
+    expect(models.resolve(undefined, "draft")).toBe("anthropic/claude-sonnet-5");
+    expect(models.resolve(undefined, "review")).toBe("anthropic/claude-sonnet-5");
+  });
+
+  it("honors ANTHROPIC_DEFAULT_SONNET_MODEL when configured", () => {
+    const models = createDefaultModelRegistry({
+      ANTHROPIC_DEFAULT_SONNET_MODEL: "z-ai/glm-4.7",
+    });
+
+    expect(models.listModels()[0]?.id).toBe("z-ai/glm-4.7");
+    expect(models.resolve(undefined, "draft")).toBe("z-ai/glm-4.7");
+  });
+});