diff --git a/CHANGELOG.md b/CHANGELOG.md
index 006d191f2..31f1dee0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ Extension bumped to 1.0.9 (Accessibility.enable allowlist + downloads permission
 ### Features
 
 * **help / browser** — `opencli browser --help -f yaml|json` now emits a structured, agent-ready index of all browser leaf commands (including nested `tab`, `get`, and `dialog` commands), their positionals, command options, namespace options, and root global options. Individual browser commands also support structured help, backed by a shared Commander option/argument spec extractor.
+* **help / built-in namespaces** — `opencli daemon|plugin|adapter|profile --help -f yaml|json` now emit the same structured payload as `browser`. One agent call returns every leaf's positionals, options, descriptions, and global options — no per-leaf `--help` follow-ups needed. Original namespace descriptions are preserved through `applyRootSubcommandSummaries()` via a snapshot at namespace declaration time.
 * **browser state** — add opt-in AX snapshot refs via `browser state --source ax`, including backend-node click resolution and role/name stale-ref recovery for the Phase 0 browser-agent runtime prototype.
 * **browser state** — AX snapshots now include same-origin iframe refs, and `browser state --compare-sources` prints DOM-vs-AX observation metrics for the Phase 1 default-source decision without dumping page contents.
 * **browser locators** — `browser find`, `browser click`, and `browser get text|value|attributes` now accept semantic locator flags (`--role`, `--name`, `--label`, `--text`, `--testid`) so agents can act on common controls without a separate state-ref lookup.
diff --git a/src/cli.test.ts b/src/cli.test.ts
index 18eeda650..e7a68b1f6 100644
--- a/src/cli.test.ts
+++ b/src/cli.test.ts
@@ -502,6 +502,114 @@ describe('createProgram root help descriptions', () => {
       process.argv = argv;
     }
   });
+
+  it('renders daemon namespace structured help with leaves and global options', () => {
+    const argv = process.argv;
+    try {
+      const program = createProgram('', '');
+      const daemon = program.commands.find(cmd => cmd.name() === 'daemon')!;
+      expect(daemon).toBeTruthy();
+
+      process.argv = ['node', 'opencli', 'daemon', '--help', '-f', 'yaml'];
+      const data = yaml.load(daemon.helpInformation()) as any;
+
+      expect(data).toMatchObject({
+        namespace: 'daemon',
+        command: 'opencli daemon',
+        usage: 'opencli daemon <command> [args] [options]',
+        description: 'Manage the opencli daemon',
+        command_count: 3,
+        namespace_options: [],
+        structured_help: { usage: 'opencli daemon --help -f yaml' },
+      });
+      expect(data.commands.map((cmd: any) => cmd.name)).toEqual(['restart', 'status', 'stop']);
+      expect(data.global_options.map((option: any) => option.name)).toEqual(expect.arrayContaining(['version', 'profile']));
+    } finally {
+      process.argv = argv;
+    }
+  });
+
+  it('renders plugin namespace structured help with positional + option leaves', () => {
+    const argv = process.argv;
+    try {
+      const program = createProgram('', '');
+      const plugin = program.commands.find(cmd => cmd.name() === 'plugin')!;
+      expect(plugin).toBeTruthy();
+
+      process.argv = ['node', 'opencli', 'plugin', '--help', '-f', 'yaml'];
+      const data = yaml.load(plugin.helpInformation()) as any;
+
+      expect(data).toMatchObject({
+        namespace: 'plugin',
+        command: 'opencli plugin',
+        description: 'Manage opencli plugins',
+        namespace_options: [],
+      });
+      expect(data.commands.map((cmd: any) => cmd.name)).toEqual(['create', 'install', 'list', 'uninstall', 'update']);
+      const update = data.commands.find((cmd: any) => cmd.name === 'update');
+      expect(update).toMatchObject({
+        usage: 'opencli plugin update [name] [options]',
+        positionals: [{ name: 'name' }],
+      });
+      expect(update.command_options.map((option: any) => option.name)).toEqual(['all']);
+    } finally {
+      process.argv = argv;
+    }
+  });
+
+  it('renders adapter namespace structured help preserving original description after applyRootSubcommandSummaries', () => {
+    const argv = process.argv;
+    try {
+      const program = createProgram('', '');
+      const adapter = program.commands.find(cmd => cmd.name() === 'adapter')!;
+      expect(adapter).toBeTruthy();
+
+      process.argv = ['node', 'opencli', 'adapter', '--help', '-f', 'yaml'];
+      const data = yaml.load(adapter.helpInformation()) as any;
+
+      // applyRootSubcommandSummaries() rewrites .description() to a child-name listing;
+      // structured help must surface the original product description via the snapshot.
+      expect(data.description).toBe('Manage CLI adapters');
+      expect(data.commands.map((cmd: any) => cmd.name)).toEqual(['eject', 'reset', 'status']);
+      const reset = data.commands.find((cmd: any) => cmd.name === 'reset');
+      expect(reset).toMatchObject({
+        usage: 'opencli adapter reset [site] [options]',
+        positionals: [{ name: 'site' }],
+      });
+      expect(reset.command_options.map((option: any) => option.name)).toEqual(['all']);
+    } finally {
+      process.argv = argv;
+    }
+  });
+
+  it('renders profile namespace structured help including required positionals', () => {
+    const argv = process.argv;
+    try {
+      const program = createProgram('', '');
+      const profile = program.commands.find(cmd => cmd.name() === 'profile')!;
+      expect(profile).toBeTruthy();
+
+      process.argv = ['node', 'opencli', 'profile', '--help', '-f', 'yaml'];
+      const data = yaml.load(profile.helpInformation()) as any;
+
+      expect(data).toMatchObject({
+        namespace: 'profile',
+        description: 'Manage Browser Bridge Chrome profiles',
+        command_count: 3,
+      });
+      expect(data.commands.map((cmd: any) => cmd.name)).toEqual(['list', 'rename', 'use']);
+      const rename = data.commands.find((cmd: any) => cmd.name === 'rename');
+      expect(rename).toMatchObject({
+        usage: 'opencli profile rename <contextId> <alias> [options]',
+        positionals: [
+          { name: 'contextId', required: true },
+          { name: 'alias', required: true },
+        ],
+      });
+    } finally {
+      process.argv = argv;
+    }
+  });
 });
 
 describe('resolveBrowserVerifyInvocation', () => {
diff --git a/src/cli.ts b/src/cli.ts
index ef74647be..16726edc5 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -2870,6 +2870,8 @@ cli({
   // ── Plugin management ──────────────────────────────────────────────────────
 
   const pluginCmd = program.command('plugin').description('Manage opencli plugins');
+  // Snapshot before applyRootSubcommandSummaries() rewrites .description() to a child-name listing.
+  const originalPluginDescription = pluginCmd.description();
 
   pluginCmd
     .command('install')
@@ -3064,6 +3066,8 @@ cli({
 
   // ── Built-in: adapter management ─────────────────────────────────────────
   const adapterCmd = program.command('adapter').description('Manage CLI adapters');
+  // Snapshot before applyRootSubcommandSummaries() rewrites .description() to a child-name listing.
+  const originalAdapterDescription = adapterCmd.description();
 
   adapterCmd
     .command('status')
@@ -3179,6 +3183,8 @@ cli({
 
   // ── Built-in: browser profile selection ──────────────────────────────────
   const profileCmd = program.command('profile').description('Manage Browser Bridge Chrome profiles');
+  // Snapshot before applyRootSubcommandSummaries() rewrites .description() to a child-name listing.
+  const originalProfileDescription = profileCmd.description();
 
   profileCmd
     .command('list')
@@ -3260,6 +3266,8 @@ cli({
 
   // ── Built-in: daemon ──────────────────────────────────────────────────────
   const daemonCmd = program.command('daemon').description('Manage the opencli daemon');
+  // Snapshot before applyRootSubcommandSummaries() rewrites .description() to a child-name listing.
+  const originalDaemonDescription = daemonCmd.description();
   daemonCmd
     .command('status')
     .description('Show daemon status')
@@ -3393,6 +3401,10 @@ cli({
   const adapterGroups: RootAdapterGroups = { external: externalNames, apps, sites };
   const adapterNameSet = new Set<string>([...externalNames, ...siteNames]);
   installCommanderNamespaceStructuredHelp(browser, { globalCommand: program, description: originalBrowserDescription });
+  installCommanderNamespaceStructuredHelp(daemonCmd, { globalCommand: program, description: originalDaemonDescription });
+  installCommanderNamespaceStructuredHelp(pluginCmd, { globalCommand: program, description: originalPluginDescription });
+  installCommanderNamespaceStructuredHelp(adapterCmd, { globalCommand: program, description: originalAdapterDescription });
+  installCommanderNamespaceStructuredHelp(profileCmd, { globalCommand: program, description: originalProfileDescription });
   program.configureHelp({
     visibleCommands: (command) => command.commands.filter(child => command !== program || !adapterNameSet.has(child.name())),
   });