fix: polish opencode-zen onboarding (#623) (thanks @magimetal)

src/commands/auth-choice.test.ts

@@ -97,4 +97,57 @@ describe("applyAuthChoice", () => {
     };
     expect(parsed.profiles?.["minimax:default"]?.key).toBe("sk-minimax-test");
   });
+
+  it("does not override the default model when selecting opencode-zen without setDefaultModel", async () => {
+    tempStateDir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-auth-"));
+    process.env.CLAWDBOT_STATE_DIR = tempStateDir;
+    process.env.CLAWDBOT_AGENT_DIR = path.join(tempStateDir, "agent");
+    process.env.PI_CODING_AGENT_DIR = process.env.CLAWDBOT_AGENT_DIR;
+
+    const text = vi.fn().mockResolvedValue("sk-opencode-zen-test");
+    const select: WizardPrompter["select"] = vi.fn(
+      async (params) => params.options[0]?.value as never,
+    );
+    const multiselect: WizardPrompter["multiselect"] = vi.fn(async () => []);
+    const prompter: WizardPrompter = {
+      intro: vi.fn(noopAsync),
+      outro: vi.fn(noopAsync),
+      note: vi.fn(noopAsync),
+      select,
+      multiselect,
+      text,
+      confirm: vi.fn(async () => false),
+      progress: vi.fn(() => ({ update: noop, stop: noop })),
+    };
+    const runtime: RuntimeEnv = {
+      log: vi.fn(),
+      error: vi.fn(),
+      exit: vi.fn((code: number) => {
+        throw new Error(`exit:${code}`);
+      }),
+    };
+
+    const result = await applyAuthChoice({
+      authChoice: "opencode-zen",
+      config: {
+        agents: {
+          defaults: {
+            model: { primary: "anthropic/claude-opus-4-5" },
+          },
+        },
+      },
+      prompter,
+      runtime,
+      setDefaultModel: false,
+    });
+
+    expect(text).toHaveBeenCalledWith(
+      expect.objectContaining({ message: "Enter OpenCode Zen API key" }),
+    );
+    expect(result.config.agents?.defaults?.model?.primary).toBe(
+      "anthropic/claude-opus-4-5",
+    );
+    expect(result.config.models?.providers?.["opencode-zen"]).toBeDefined();
+    expect(result.agentModelOverride).toBe("opencode-zen/claude-opus-4-5");
+  });
 });