feat: add shell completion installation prompt to CLI update command

src/cli/update-cli.ts

@@ -51,6 +51,7 @@ import { renderTable } from "../terminal/table.js";
 import { theme } from "../terminal/theme.js";
 import { replaceCliName, resolveCliName } from "./cli-name.js";
 import { formatCliCommand } from "./command-format.js";
+import { installCompletion, isCompletionInstalled, resolveShellFromEnv } from "./completion-cli.js";
 import { formatHelpExamples } from "./help-format.js";
 
 export type UpdateCommandOptions = {
@@ -224,6 +225,43 @@ async function tryWriteCompletionCache(root: string, jsonMode: boolean): Promise
   }
 }
 
+/** Check if shell completion is installed and prompt user to install if not. */
+async function tryInstallShellCompletion(opts: {
+  jsonMode: boolean;
+  skipPrompt: boolean;
+}): Promise<void> {
+  if (opts.jsonMode || !process.stdin.isTTY) {
+    return;
+  }
+
+  const shell = resolveShellFromEnv();
+  const installed = await isCompletionInstalled(shell, CLI_NAME);
+  if (installed) {
+    return;
+  }
+
+  defaultRuntime.log("");
+  defaultRuntime.log(theme.heading("Shell completion"));
+
+  const shouldInstall = await confirm({
+    message: stylePromptMessage(`Enable ${shell} shell completion for ${CLI_NAME}?`),
+    initialValue: true,
+  });
+
+  if (isCancel(shouldInstall) || !shouldInstall) {
+    if (!opts.skipPrompt) {
+      defaultRuntime.log(
+        theme.muted(
+          `Skipped. Run \`${replaceCliName(formatCliCommand("openclaw completion --install"), CLI_NAME)}\` later to enable.`,
+        ),
+      );
+    }
+    return;
+  }
+
+  await installCompletion(shell, opts.skipPrompt, CLI_NAME);
+}
+
 async function isEmptyDir(targetPath: string): Promise<boolean> {
   try {
     const entries = await fs.readdir(targetPath);
@@ -985,6 +1023,12 @@ export async function updateCommand(opts: UpdateCommandOptions): Promise<void> {
 
   await tryWriteCompletionCache(root, Boolean(opts.json));
 
+  // Offer to install shell completion if not already installed
+  await tryInstallShellCompletion({
+    jsonMode: Boolean(opts.json),
+    skipPrompt: Boolean(opts.yes),
+  });
+
   // Restart service if requested
   if (shouldRestart) {
     if (!opts.json) {