Add Synthetic provider support

src/commands/auth-choice.test.ts

@@ -102,6 +102,67 @@ describe("applyAuthChoice", () => {
     expect(parsed.profiles?.["minimax:default"]?.key).toBe("sk-minimax-test");
   });
 
+  it("prompts and writes Synthetic API key when selecting synthetic-api-key", 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-synthetic-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: "synthetic-api-key",
+      config: {},
+      prompter,
+      runtime,
+      setDefaultModel: true,
+    });
+
+    expect(text).toHaveBeenCalledWith(
+      expect.objectContaining({ message: "Enter Synthetic API key" }),
+    );
+    expect(result.config.auth?.profiles?.["synthetic:default"]).toMatchObject({
+      provider: "synthetic",
+      mode: "api_key",
+    });
+
+    const authProfilePath = path.join(
+      tempStateDir,
+      "agents",
+      "main",
+      "agent",
+      "auth-profiles.json",
+    );
+    const raw = await fs.readFile(authProfilePath, "utf8");
+    const parsed = JSON.parse(raw) as {
+      profiles?: Record<string, { key?: string }>;
+    };
+    expect(parsed.profiles?.["synthetic:default"]?.key).toBe(
+      "sk-synthetic-test",
+    );
+  });
+
   it("sets default model when selecting github-copilot", async () => {
     tempStateDir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-auth-"));
     process.env.CLAWDBOT_STATE_DIR = tempStateDir;