feat: rename 'extension' command to 'extensions' and update auto-complete

- Rename 'extension' command to 'extensions' in CLI app
- Skip upgrade menu for extension commands to avoid prompts
- Update shell completion scripts for both bash and zsh
- Add comprehensive tests for extensions command
- Fix test fixture issues in integration tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: James Zhu

code_assistant_manager/cli/app.py

@@ -38,6 +38,10 @@ def _lazy_import_mcp_app():
     from code_assistant_manager.mcp.cli import app as mcp_app
     return mcp_app
 
+def _lazy_import_extension_app():
+    from code_assistant_manager.cli.extension_commands import extension_app
+    return extension_app
+
 # Module-level typer.Option constants to fix B008 linting errors
 from .options import (
     CONFIG_FILE_OPTION,
@@ -254,6 +258,10 @@ def _get_agent_app_impl():
     """Wrapper that defers agent app import."""
     return _get_lazy_app(_lazy_import_agent_app, "agent")
 
+def _get_extension_app_impl():
+    """Wrapper that defers extension app import."""
+    return _get_lazy_app(_lazy_import_extension_app, "extension")
+
 # Note: Due to how Typer works, the apps are still evaluated at import time.
 # The actual performance benefit comes from:
 # 1. The tools modules no longer being imported upfront (done in tools/__init__.py)
@@ -282,6 +290,9 @@ def _get_agent_app_impl():
 # Add the agent app as a subcommand to the main app (Claude Code agents)
 app.add_typer(_get_agent_app_impl(), name="agent")
 app.add_typer(_get_agent_app_impl(), name="ag", hidden=True)
+# Add the extension app as a subcommand to the main app (Gemini extensions)
+app.add_typer(_get_extension_app_impl(), name="extensions")
+app.add_typer(_get_extension_app_impl(), name="ext", hidden=True)
 
 
 @config_app.command("validate")

code_assistant_manager/cli/completion_commands.py

@@ -82,7 +82,7 @@ def _generate_bash_completion() -> str:
     cword=$COMP_CWORD
 
     # Main commands (visible and hidden aliases)
-    commands="launch l config cf mcp m prompt p skill s plugin pl agent ag upgrade u install i uninstall un doctor d version v completion comp c --help --version --config --endpoints --debug -d"
+    commands="launch l config cf mcp m prompt p skill s plugin pl agent ag extensions ext upgrade u install i uninstall un doctor d version v completion comp c --help --version --config --endpoints --debug -d"
 
     # Tool names for launch command
     tools="claude codex copilot gemini droid qwen codebuddy iflow qodercli zed neovate crush cursor-agent"
@@ -102,6 +102,9 @@ def _generate_bash_completion() -> str:
     # Agent subcommands
     agent_commands="list fetch view install uninstall repos add-repo remove-repo installed uninstall-all"
 
+    # Extensions subcommands
+    extensions_commands="browse install uninstall list update disable enable link new validate settings"
+
     # Global flags
     global_flags="--help --version --config --endpoints --debug -d"
 
@@ -155,6 +158,10 @@ def _generate_bash_completion() -> str:
             COMPREPLY=( $(compgen -W "${agent_commands}" -- ${cur}) )
             return 0
             ;;
+        extensions|ext)
+            COMPREPLY=( $(compgen -W "${extensions_commands}" -- ${cur}) )
+            return 0
+            ;;
         upgrade|u)
             COMPREPLY=( $(compgen -W "all ${tools} mcp --verbose -v" -- ${cur}) )
             return 0
@@ -393,6 +400,22 @@ def _generate_bash_completion() -> str:
                         ;;
                 esac
                 ;;
+            extensions|ext)
+                case "${COMP_WORDS[2]}" in
+                    browse|list|new|settings)
+                        COMPREPLY=( $(compgen -W "--help" -- ${cur}) )
+                        return 0
+                        ;;
+                    install|uninstall|update|disable|enable|validate)
+                        COMPREPLY=( $(compgen -W "--help" -- ${cur}) )
+                        return 0
+                        ;;
+                    link)
+                        COMPREPLY=( $(compgen -W "--help" -- ${cur}) )
+                        return 0
+                        ;;
+                esac
+                ;;
             upgrade|u|install|i)
                 case "${COMP_WORDS[2]}" in
                     all|claude|codex|copilot|gemini|droid|qwen|codebuddy|iflow|qodercli|zed|neovate|crush|cursor-agent|mcp)
@@ -440,7 +463,7 @@ def _generate_zsh_completion() -> str:
 #compdef code-assistant-manager cam
 
 _code_assistant_manager() {
-    local -a commands tools mcp_server_commands config_commands prompt_commands skill_commands plugin_commands agent_commands global_flags
+    local -a commands tools mcp_server_commands config_commands prompt_commands skill_commands plugin_commands agent_commands extensions_commands global_flags
     local context state line
 
     commands=(
@@ -458,6 +481,8 @@ def _generate_zsh_completion() -> str:
         'pl:Alias for plugin'
         'agent:Agent management commands'
         'ag:Alias for agent'
+        'extensions:Manage extensions for AI assistants'
+        'ext:Alias for extensions'
         'upgrade:Upgrade CLI tools'
         'u:Alias for upgrade'
         'install:Install CLI tools'
@@ -564,6 +589,20 @@ def _generate_zsh_completion() -> str:
         'uninstall-all:Uninstall all agents'
     )
 
+    extensions_commands=(
+        'browse:Browse available Gemini extensions'
+        'install:Install a Gemini extension'
+        'uninstall:Uninstall a Gemini extension'
+        'list:List installed Gemini extensions'
+        'update:Update Gemini extensions'
+        'disable:Disable a Gemini extension'
+        'enable:Enable a Gemini extension'
+        'link:Link a local Gemini extension'
+        'new:Create a new Gemini extension'
+        'validate:Validate a Gemini extension'
+        'settings:Manage Gemini extension settings'
+    )
+
     global_flags=(
         '--help[Show help]'
         '--version[Show version]'
@@ -748,6 +787,23 @@ def _generate_zsh_completion() -> str:
                         esac
                     fi
                     ;;
+                extensions|ext)
+                    if (( CURRENT == 2 )); then
+                        _describe -t extensions_commands 'extensions command' extensions_commands
+                    else
+                        case $words[2] in
+                            browse|list|new|settings)
+                                _values 'option' '--help[Show help]'
+                                ;;
+                            install|uninstall|update|disable|enable|validate|link)
+                                _values 'option' '--help[Show help]'
+                                ;;
+                            *)
+                                _values 'option' '--help[Show help]'
+                                ;;
+                        esac
+                    fi
+                    ;;
                 upgrade|u|install|i)
                     if (( CURRENT == 2 )); then
                         local -a upgrade_targets