fix: quiet update banner and skip duplicate plugin CLI

src/plugins/cli.ts

@@ -24,7 +24,20 @@ export function registerPluginCliCommands(program: Command, cfg?: ClawdbotConfig
     logger,
   });
 
+  const existingCommands = new Set(program.commands.map((cmd) => cmd.name()));
+
   for (const entry of registry.cliRegistrars) {
+    if (entry.commands.length > 0) {
+      const overlaps = entry.commands.filter((command) => existingCommands.has(command));
+      if (overlaps.length > 0) {
+        log.debug(
+          `plugin CLI register skipped (${entry.pluginId}): command already registered (${overlaps.join(
+            ", ",
+          )})`,
+        );
+        continue;
+      }
+    }
     try {
       const result = entry.register({
         program,
@@ -37,6 +50,9 @@ export function registerPluginCliCommands(program: Command, cfg?: ClawdbotConfig
           log.warn(`plugin CLI register failed (${entry.pluginId}): ${String(err)}`);
         });
       }
+      for (const command of entry.commands) {
+        existingCommands.add(command);
+      }
     } catch (err) {
       log.warn(`plugin CLI register failed (${entry.pluginId}): ${String(err)}`);
     }