fix(onboard): reject noninteractive TUI mode (#115573)

src/commands/onboard.test.ts

@@ -885,4 +885,18 @@ describe("setupWizardCommand", () => {
     expect(mocks.runInteractiveSetup).not.toHaveBeenCalled();
     expect(mocks.runGuidedOnboarding).not.toHaveBeenCalled();
   });
+
+  it("rejects conflicting TUI and non-interactive modes", async () => {
+    const runtime = makeRuntime();
+
+    await setupWizardCommand({ tui: true, nonInteractive: true, acceptRisk: true }, runtime);
+
+    expect(runtime.error).toHaveBeenCalledWith(
+      "--tui cannot be combined with --non-interactive. Remove --tui for automation, or remove --non-interactive to open the terminal hatch.",
+    );
+    expect(runtime.exit).toHaveBeenCalledWith(1);
+    expect(mocks.runNonInteractiveSetup).not.toHaveBeenCalled();
+    expect(mocks.runInteractiveSetup).not.toHaveBeenCalled();
+    expect(mocks.runGuidedOnboarding).not.toHaveBeenCalled();
+  });
 });

src/commands/onboard.ts

@@ -473,6 +473,13 @@ export async function setupWizardCommand(
     runtime.exit(1);
     return;
   }
+  if (normalizedOpts.tui && normalizedOpts.nonInteractive) {
+    runtime.error(
+      "--tui cannot be combined with --non-interactive. Remove --tui for automation, or remove --non-interactive to open the terminal hatch.",
+    );
+    runtime.exit(1);
+    return;
+  }
   if (
     normalizedOpts.secretInputMode &&
     normalizedOpts.secretInputMode !== "plaintext" && // pragma: allowlist secret