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* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {
listExtensions,
type Config,
getErrorMessage,
} from '@google/gemini-cli-core';
import { SettingScope } from '../../config/settings.js';
import {
ExtensionManager,
inferInstallMetadata,
} from '../../config/extension-manager.js';
import { McpServerEnablementManager } from '../../config/mcp/mcpServerEnablement.js';
import { stat } from 'node:fs/promises';
import type {
Command,
CommandContext,
CommandExecutionResponse,
} from './types.js';
export class ExtensionsCommand implements Command {
readonly name = 'extensions';
readonly description = 'Manage extensions.';
readonly subCommands = [
new ListExtensionsCommand(),
new ExploreExtensionsCommand(),
new EnableExtensionCommand(),
new DisableExtensionCommand(),
new InstallExtensionCommand(),
new LinkExtensionCommand(),
new UninstallExtensionCommand(),
new RestartExtensionCommand(),
new UpdateExtensionCommand(),
];
async execute(
context: CommandContext,
_: string[],
): Promise<CommandExecutionResponse> {
return new ListExtensionsCommand().execute(context, _);
}
}
export class ListExtensionsCommand implements Command {
readonly name = 'extensions list';
readonly description = 'Lists all installed extensions.';
async execute(
context: CommandContext,
_: string[],
): Promise<CommandExecutionResponse> {
const extensions = listExtensions(context.agentContext.config);
const data = extensions.length ? extensions : 'No extensions installed.';
return { name: this.name, data };
}
}
export class ExploreExtensionsCommand implements Command {
readonly name = 'extensions explore';
readonly description = 'Explore available extensions.';
async execute(
_context: CommandContext,
_: string[],
): Promise<CommandExecutionResponse> {
const extensionsUrl = 'https://geminicli.com/extensions/';
return {
name: this.name,
data: `View or install available extensions at ${extensionsUrl}`,
};
}
}
function getEnableDisableContext(
config: Config,
args: string[],
invocationName: string,
) {
const extensionManager = config.getExtensionLoader();
if (!(extensionManager instanceof ExtensionManager)) {
return {
error: `Cannot ${invocationName} extensions in this environment.`,
};
}
if (args.length === 0) {
return {
error: `Usage: /extensions ${invocationName} <extension> [--scope=<user|workspace|session>]`,
};
}
let scope = SettingScope.User;
if (args.includes('--scope=workspace') || args.includes('workspace')) {
scope = SettingScope.Workspace;
} else if (args.includes('--scope=session') || args.includes('session')) {
scope = SettingScope.Session;
}
const name = args.filter(
(a) =>
!a.startsWith('--scope') && !['user', 'workspace', 'session'].includes(a),
)[0];
let names: string[] = [];
if (name === '--all') {
let extensions = extensionManager.getExtensions();
if (invocationName === 'enable') {
extensions = extensions.filter((ext) => !ext.isActive);
}
if (invocationName === 'disable') {
extensions = extensions.filter((ext) => ext.isActive);
}
names = extensions.map((ext) => ext.name);
} else if (name) {
names = [name];
} else {
return { error: 'No extension name provided.' };
}
return { extensionManager, names, scope };
}
export class EnableExtensionCommand implements Command {
readonly name = 'extensions enable';
readonly description = 'Enable an extension.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const enableContext = getEnableDisableContext(
context.agentContext.config,
args,
'enable',
);
if ('error' in enableContext) {
return { name: this.name, data: enableContext.error };
}
const { names, scope, extensionManager } = enableContext;
const output: string[] = [];
for (const name of names) {
try {
await extensionManager.enableExtension(name, scope);
output.push(`Extension "${name}" enabled for scope "${scope}".`);
const extension = extensionManager
.getExtensions()
.find((e) => e.name === name);
if (extension?.mcpServers) {
const mcpEnablementManager = McpServerEnablementManager.getInstance();
const mcpClientManager =
context.agentContext.config.getMcpClientManager();
const enabledServers = await mcpEnablementManager.autoEnableServers(
Object.keys(extension.mcpServers),
);
if (mcpClientManager && enabledServers.length > 0) {
const restartPromises = enabledServers.map((serverName) =>
mcpClientManager.restartServer(serverName).catch((error) => {
output.push(
`Failed to restart MCP server '${serverName}': ${getErrorMessage(error)}`,
);
}),
);
await Promise.all(restartPromises);
output.push(`Re-enabled MCP servers: ${enabledServers.join(', ')}`);
}
}
} catch (e) {
output.push(`Failed to enable "${name}": ${getErrorMessage(e)}`);
}
}
return { name: this.name, data: output.join('\n') || 'No action taken.' };
}
}
export class DisableExtensionCommand implements Command {
readonly name = 'extensions disable';
readonly description = 'Disable an extension.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const enableContext = getEnableDisableContext(
context.agentContext.config,
args,
'disable',
);
if ('error' in enableContext) {
return { name: this.name, data: enableContext.error };
}
const { names, scope, extensionManager } = enableContext;
const output: string[] = [];
for (const name of names) {
try {
await extensionManager.disableExtension(name, scope);
output.push(`Extension "${name}" disabled for scope "${scope}".`);
} catch (e) {
output.push(`Failed to disable "${name}": ${getErrorMessage(e)}`);
}
}
return { name: this.name, data: output.join('\n') || 'No action taken.' };
}
}
export class InstallExtensionCommand implements Command {
readonly name = 'extensions install';
readonly description = 'Install an extension from a git repo or local path.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const extensionLoader = context.agentContext.config.getExtensionLoader();
if (!(extensionLoader instanceof ExtensionManager)) {
return {
name: this.name,
data: 'Cannot install extensions in this environment.',
};
}
const source = args.join(' ').trim();
if (!source) {
return { name: this.name, data: `Usage: /extensions install <source>` };
}
if (/[;&|`'"]/.test(source)) {
return {
name: this.name,
data: `Invalid source: contains disallowed characters.`,
};
}
try {
const installMetadata = await inferInstallMetadata(source);
const extension =
await extensionLoader.installOrUpdateExtension(installMetadata);
return {
name: this.name,
data: `Extension "${extension.name}" installed successfully.`,
};
} catch (error) {
return {
name: this.name,
data: `Failed to install extension from "${source}": ${getErrorMessage(error)}`,
};
}
}
}
export class LinkExtensionCommand implements Command {
readonly name = 'extensions link';
readonly description = 'Link an extension from a local path.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const extensionLoader = context.agentContext.config.getExtensionLoader();
if (!(extensionLoader instanceof ExtensionManager)) {
return {
name: this.name,
data: 'Cannot link extensions in this environment.',
};
}
const sourceFilepath = args.join(' ').trim();
if (!sourceFilepath) {
return { name: this.name, data: `Usage: /extensions link <source>` };
}
try {
await stat(sourceFilepath);
} catch {
return { name: this.name, data: `Invalid source: ${sourceFilepath}` };
}
try {
const extension = await extensionLoader.installOrUpdateExtension({
source: sourceFilepath,
type: 'link',
});
return {
name: this.name,
data: `Extension "${extension.name}" linked successfully.`,
};
} catch (error) {
return {
name: this.name,
data: `Failed to link extension: ${getErrorMessage(error)}`,
};
}
}
}
export class UninstallExtensionCommand implements Command {
readonly name = 'extensions uninstall';
readonly description = 'Uninstall an extension.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const extensionLoader = context.agentContext.config.getExtensionLoader();
if (!(extensionLoader instanceof ExtensionManager)) {
return {
name: this.name,
data: 'Cannot uninstall extensions in this environment.',
};
}
const all = args.includes('--all');
const names = args.filter((a) => !a.startsWith('--')).map((a) => a.trim());
if (!all && names.length === 0) {
return {
name: this.name,
data: `Usage: /extensions uninstall <extension-names...>|--all`,
};
}
let namesToUninstall: string[] = [];
if (all) {
namesToUninstall = extensionLoader.getExtensions().map((ext) => ext.name);
} else {
namesToUninstall = names;
}
if (namesToUninstall.length === 0) {
return {
name: this.name,
data: all ? 'No extensions installed.' : 'No extension name provided.',
};
}
const output: string[] = [];
for (const extensionName of namesToUninstall) {
try {
await extensionLoader.uninstallExtension(extensionName, false);
output.push(`Extension "${extensionName}" uninstalled successfully.`);
} catch (error) {
output.push(
`Failed to uninstall extension "${extensionName}": ${getErrorMessage(error)}`,
);
}
}
return { name: this.name, data: output.join('\n') };
}
}
export class RestartExtensionCommand implements Command {
readonly name = 'extensions restart';
readonly description = 'Restart an extension.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const extensionLoader = context.agentContext.config.getExtensionLoader();
if (!(extensionLoader instanceof ExtensionManager)) {
return { name: this.name, data: 'Cannot restart extensions.' };
}
const all = args.includes('--all');
const names = all ? null : args.filter((a) => !!a);
if (!all && names?.length === 0) {
return {
name: this.name,
data: 'Usage: /extensions restart <extension-names>|--all',
};
}
let extensionsToRestart = extensionLoader
.getExtensions()
.filter((e) => e.isActive);
if (names) {
extensionsToRestart = extensionsToRestart.filter((e) =>
names.includes(e.name),
);
}
if (extensionsToRestart.length === 0) {
return {
name: this.name,
data: 'No active extensions matched the request.',
};
}
const output: string[] = [];
for (const extension of extensionsToRestart) {
try {
await extensionLoader.restartExtension(extension);
output.push(`Restarted "${extension.name}".`);
} catch (e) {
output.push(
`Failed to restart "${extension.name}": ${getErrorMessage(e)}`,
);
}
}
return { name: this.name, data: output.join('\n') };
}
}
export class UpdateExtensionCommand implements Command {
readonly name = 'extensions update';
readonly description = 'Update an extension.';
async execute(
context: CommandContext,
args: string[],
): Promise<CommandExecutionResponse> {
const extensionLoader = context.agentContext.config.getExtensionLoader();
if (!(extensionLoader instanceof ExtensionManager)) {
return { name: this.name, data: 'Cannot update extensions.' };
}
const all = args.includes('--all');
const names = all ? null : args.filter((a) => !!a);
if (!all && names?.length === 0) {
return {
name: this.name,
data: 'Usage: /extensions update <extension-names>|--all',
};
}
return {
name: this.name,
data: 'Headless extension updating requires internal UI dispatches. Please use `gemini extensions update` directly in the terminal.',
};
}
}
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