diff --git a/src/cli/program/preaction.ts b/src/cli/program/preaction.ts
index 021e9ea72..1607e0634 100644
--- a/src/cli/program/preaction.ts
+++ b/src/cli/program/preaction.ts
@@ -4,6 +4,7 @@ import { emitCliBanner } from "../banner.js";
 import { getCommandPath, getVerboseFlag, hasHelpOrVersion } from "../argv.js";
 import { ensureConfigReady } from "./config-guard.js";
 import { ensurePluginRegistryLoaded } from "../plugin-registry.js";
+import { isTruthyEnvValue } from "../../infra/env.js";
 import { setVerbose } from "../../globals.js";
 
 function setProcessTitleForCommand(actionCommand: Command) {
@@ -22,15 +23,21 @@ const PLUGIN_REQUIRED_COMMANDS = new Set(["message", "channels", "directory"]);
 export function registerPreActionHooks(program: Command, programVersion: string) {
   program.hook("preAction", async (_thisCommand, actionCommand) => {
     setProcessTitleForCommand(actionCommand);
-    emitCliBanner(programVersion);
     const argv = process.argv;
     if (hasHelpOrVersion(argv)) return;
+    const commandPath = getCommandPath(argv, 2);
+    const hideBanner =
+      isTruthyEnvValue(process.env.CLAWDBOT_HIDE_BANNER) ||
+      commandPath[0] === "update" ||
+      (commandPath[0] === "plugins" && commandPath[1] === "update");
+    if (!hideBanner) {
+      emitCliBanner(programVersion);
+    }
     const verbose = getVerboseFlag(argv, { includeDebug: true });
     setVerbose(verbose);
     if (!verbose) {
       process.env.NODE_NO_WARNINGS ??= "1";
     }
-    const commandPath = getCommandPath(argv, 2);
     if (commandPath[0] === "doctor") return;
     await ensureConfigReady({ runtime: defaultRuntime, commandPath });
     // Load plugins for commands that need channel access
diff --git a/src/cli/update-cli.ts b/src/cli/update-cli.ts
index 99da9ac0d..02f92d01e 100644
--- a/src/cli/update-cli.ts
+++ b/src/cli/update-cli.ts
@@ -19,7 +19,6 @@ import {
   type UpdateStepInfo,
   type UpdateStepResult,
   type UpdateStepProgress,
-  type UpdateStepResult,
 } from "../infra/update-runner.js";
 import {
   detectGlobalInstallManagerByPresence,
diff --git a/src/plugins/cli.test.ts b/src/plugins/cli.test.ts
new file mode 100644
index 000000000..59c9c469c
--- /dev/null
+++ b/src/plugins/cli.test.ts
@@ -0,0 +1,45 @@
+import { Command } from "commander";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({
+  memoryRegister: vi.fn(),
+  otherRegister: vi.fn(),
+}));
+
+vi.mock("./loader.js", () => ({
+  loadClawdbotPlugins: () => ({
+    cliRegistrars: [
+      {
+        pluginId: "memory-core",
+        register: mocks.memoryRegister,
+        commands: ["memory"],
+        source: "bundled",
+      },
+      {
+        pluginId: "other",
+        register: mocks.otherRegister,
+        commands: ["other"],
+        source: "bundled",
+      },
+    ],
+  }),
+}));
+
+import { registerPluginCliCommands } from "./cli.js";
+
+describe("registerPluginCliCommands", () => {
+  beforeEach(() => {
+    mocks.memoryRegister.mockClear();
+    mocks.otherRegister.mockClear();
+  });
+
+  it("skips plugin CLI registrars when commands already exist", () => {
+    const program = new Command();
+    program.command("memory");
+
+    registerPluginCliCommands(program, {} as any);
+
+    expect(mocks.memoryRegister).not.toHaveBeenCalled();
+    expect(mocks.otherRegister).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/src/plugins/cli.ts b/src/plugins/cli.ts
index 6a3571b2d..a8c92fd56 100644
--- a/src/plugins/cli.ts
+++ b/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)}`);
     }