diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4e1307a..d2ea2cf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,7 @@ concurrency:
 env:
   # Min and max limits of jupyterlite-core versions that this should work on.
   # Changes here should be synchronised with pyproject.toml dependencies section.
-  MIN_LITE_VERSION: jupyterlite-core==0.6.0
+  MIN_LITE_VERSION: jupyterlite-core==0.7.0a7
   MAX_LITE_VERSION: --pre jupyterlite-core<0.8.0
 
   LAB_VERSION: jupyterlab>=4.0.0,<5
diff --git a/package.json b/package.json
index e537fb9..5bee593 100644
--- a/package.json
+++ b/package.json
@@ -64,8 +64,8 @@
         "@jupyterlab/services": "^7.4.3",
         "@jupyterlab/settingregistry": "^4.4.3",
         "@jupyterlite/cockle": "^1.2.0",
-        "@jupyterlite/contents": "^0.6.0",
-        "@jupyterlite/server": "^0.6.0",
+        "@jupyterlite/contents": "^0.7.0-a7",
+        "@jupyterlite/server": "^0.7.0-a7",
         "@lumino/coreutils": "^2.2.1",
         "@lumino/signaling": "^2.1.4",
         "mock-socket": "^9.3.1"
diff --git a/pyproject.toml b/pyproject.toml
index 85489bd..90bf58d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 ]
 dependencies = [
     # Changes here should be synchronised with .github/workflows/build.yml
-    "jupyterlite-core>=0.6,<0.8.0"
+    "jupyterlite-core>=0.7.0a7,<0.8.0"
 ]
 dynamic = ["version", "description", "authors", "urls", "keywords"]
 
diff --git a/src/index.ts b/src/index.ts
index aa13b0a..1ebaee4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -20,6 +20,7 @@ import { ISettingRegistry } from '@jupyterlab/settingregistry';
 import { WebSocket } from 'mock-socket';
 
 import { LiteTerminalAPIClient } from './client';
+import { LiteCommand } from './lite_command';
 import { ILiteTerminalAPIClient } from './tokens';
 
 /**
@@ -137,11 +138,32 @@ const terminalThemeChangePlugin: JupyterFrontEndPlugin<void> = {
   }
 };
 
+const liteCommandPlugin: JupyterFrontEndPlugin<void> = {
+  id: '@jupyterlite/terminal:lite-command',
+  autoStart: true,
+  requires: [ILiteTerminalAPIClient],
+  activate: (
+    app: JupyterFrontEnd,
+    liteTerminalAPIClient: ILiteTerminalAPIClient
+  ): void => {
+    const liteCommand = new LiteCommand(app.commands);
+    const command = liteCommand.run.bind(liteCommand);
+    const tabComplete = liteCommand.tabComplete.bind(liteCommand);
+
+    liteTerminalAPIClient.registerExternalCommand({
+      name: 'lite-command',
+      command,
+      tabComplete
+    });
+  }
+};
+
 export default [
   terminalClientPlugin,
   terminalManagerPlugin,
   terminalServiceWorkerPlugin,
-  terminalThemeChangePlugin
+  terminalThemeChangePlugin,
+  liteCommandPlugin
 ];
 
 // Export ILiteTerminalAPIClient so that other extensions can register external commands.
diff --git a/src/lite_command.ts b/src/lite_command.ts
new file mode 100644
index 0000000..64983d4
--- /dev/null
+++ b/src/lite_command.ts
@@ -0,0 +1,320 @@
+import {
+  ansi,
+  BooleanArgument,
+  CommandArguments,
+  ExitCode,
+  IExternalRunContext,
+  IExternalTabCompleteContext,
+  IExternalTabCompleteResult,
+  PathType,
+  PositionalArguments,
+  SubcommandArguments
+} from '@jupyterlite/cockle';
+import { CommandRegistry } from '@lumino/commands';
+import { PartialJSONObject } from '@lumino/coreutils';
+
+class DescribeSubcommand extends SubcommandArguments {
+  positional = new PositionalArguments({
+    min: 1,
+    tabComplete: async (context: IExternalTabCompleteContext) => {
+      const liteCommand: LiteCommand | undefined = (context as any).liteCommand;
+      return { possibles: liteCommand?.commandNames() ?? [] };
+    }
+  });
+}
+
+class ListSubcommand extends SubcommandArguments {}
+
+class RunSubcommand extends SubcommandArguments {
+  positional = new PositionalArguments({
+    min: 1,
+    tabComplete: async (context: IExternalTabCompleteContext) => {
+      const liteCommand: LiteCommand | undefined = (context as any).liteCommand;
+      let possibles: string[] | undefined = undefined;
+      if (liteCommand !== undefined) {
+        const { args } = context;
+        if (args.length === 1) {
+          // Command name.
+          possibles = liteCommand.commandNames();
+        } else if (args.length % 2 === 0) {
+          // Argument name.
+          const commandName = args[0];
+          possibles = await liteCommand.argumentNames(commandName);
+        } else {
+          // Argument value corresponding to the previous argument name.
+          const commandName = args[0];
+          const argumentName = args[args.length - 2];
+          const typeAndValues = await liteCommand.argumentTypeAndValues(
+            commandName,
+            argumentName
+          );
+          possibles = typeAndValues?.values;
+          if (
+            (possibles === undefined || possibles.length === 0) &&
+            typeAndValues?.type === 'string'
+          ) {
+            // Match on path
+            return { pathType: PathType.Any };
+          }
+        }
+      }
+      return { possibles };
+    }
+  });
+}
+
+class LiteCommandArguments extends CommandArguments {
+  help = new BooleanArgument('h', 'help', 'display this help and exit');
+  subcommands = {
+    list: new ListSubcommand('list', 'list available JupyterLite commands.'),
+    describe: new DescribeSubcommand(
+      'describe',
+      'describe one or more JupyterLite commands.'
+    ),
+    run: new RunSubcommand('run', 'Run a JupyterLite command')
+  };
+}
+
+export class LiteCommand {
+  constructor(readonly commandRegistry: CommandRegistry) {}
+
+  async run(context: IExternalRunContext): Promise<number> {
+    const { stdout } = context;
+    const args = new LiteCommandArguments().parse(context.args);
+    const { subcommands } = args;
+
+    if (args.help.isSet) {
+      args.writeHelp(stdout);
+      return ExitCode.SUCCESS;
+    }
+
+    if (subcommands.list.isSet) {
+      this.commandNames().forEach(name => stdout.write(name + '\n'));
+    } else if (subcommands.describe.isSet) {
+      let started = false;
+      for (const name of subcommands.describe.positional.strings) {
+        if (started) {
+          stdout.write('\n');
+        } else {
+          started = true;
+        }
+        await this._describeCommand(context, name);
+      }
+    } else if (subcommands.run.isSet) {
+      const argumentsAndValues = subcommands.run.positional.strings;
+      const name = argumentsAndValues.shift()!;
+      await this._runCommand(name, argumentsAndValues);
+    } else {
+      return ExitCode.GENERAL_ERROR;
+    }
+
+    return ExitCode.SUCCESS;
+  }
+
+  async tabComplete(
+    context: IExternalTabCompleteContext
+  ): Promise<IExternalTabCompleteResult> {
+    const extendedContext = { ...context, liteCommand: this };
+    return await new LiteCommandArguments().tabComplete(extendedContext);
+  }
+
+  /**
+   * Return the argument names of a JupyterLite command.
+   */
+  async argumentNames(commandName: string): Promise<string[]> {
+    const description = await this.commandRegistry.describedBy(commandName);
+    const properties = description.args?.properties as any;
+    if (properties) {
+      return Object.keys(properties);
+    }
+    return [];
+  }
+
+  /**
+   * Return the type and possible values of a JupyterLite command.
+   */
+  async argumentTypeAndValues(
+    commandName: string,
+    argumentName: string
+  ): Promise<{ type: string; values: string[] | undefined } | undefined> {
+    const description = await this.commandRegistry.describedBy(commandName);
+    const properties = description.args?.properties as any;
+    if (properties) {
+      const property = properties[argumentName];
+      if (property) {
+        const type = property['type'] ?? '';
+        let values: string[] | undefined = undefined;
+        if (type === 'string') {
+          const enum_ = property['enum'];
+          if (enum_ && Array.isArray(enum_)) {
+            values = enum_.map(item => String(item));
+          }
+        }
+
+        // boolean possibles ????
+
+        return { type, values };
+      }
+    }
+    return undefined;
+  }
+
+  /**
+   * Return sorted list of JupyterLite command names.
+   */
+  commandNames(): string[] {
+    return this.commandRegistry
+      .listCommands()
+      .filter(n => !n.startsWith('_'))
+      .sort();
+  }
+
+  /**
+   * Describe named command.
+   * @param name Name of command to describe.
+   */
+  private async _describeCommand(
+    context: IExternalRunContext,
+    name: string
+  ): Promise<void> {
+    if (!this._hasCommand(name)) {
+      throw new Error(`No such JupyterLite command: ${name}`);
+    }
+
+    const { environment, stdout } = context;
+    let colorize = (text: string): string => text;
+    if (stdout.supportsAnsiEscapes()) {
+      const isDarkMode = environment.get('COCKLE_DARK_MODE') === '1';
+      const color = isDarkMode ? ansi.styleBrightBlue : ansi.styleBlue;
+      colorize = (text: string): string => color + text + ansi.styleReset;
+    }
+
+    const caption = this.commandRegistry.caption(name);
+    const label = this.commandRegistry.label(name);
+    const usage = this.commandRegistry.usage(name);
+
+    stdout.write(`${colorize('name:')} ${name}\n`);
+    if (caption && caption.length > 0) {
+      stdout.write(`${colorize('caption:')} ${caption}\n`);
+    }
+    if (label && label.length > 0) {
+      stdout.write(`${colorize('label:')} ${label}\n`);
+    }
+    if (usage && usage.length > 0) {
+      stdout.write(`${colorize('usage:')} ${usage}\n`);
+    }
+
+    const description = await this.commandRegistry.describedBy(name);
+    const properties = description.args?.properties as any;
+    if (properties) {
+      const argNames = Object.keys(properties);
+      if (argNames.length > 0) {
+        stdout.write(`${colorize('arguments:')}\n`);
+      }
+
+      for (const argName of argNames) {
+        const arg = properties[argName];
+        stdout.write(`  ${argName}\n`);
+        stdout.write(`    ${colorize('description:')} ${arg.description}\n`);
+
+        const typeAndValues = await this.argumentTypeAndValues(name, argName);
+        if (typeAndValues !== undefined) {
+          const { type, values } = typeAndValues;
+          stdout.write(`    ${colorize('type:')} ${type}\n`);
+          if (values !== undefined) {
+            stdout.write(
+              `    ${colorize('possible values:')} ${values.join(' ')}\n`
+            );
+          }
+        }
+      }
+    }
+
+    const required = description.args?.required;
+    if (required !== undefined && Array.isArray(required)) {
+      stdout.write(
+        `${colorize('required arguments:')} ${required.join(' ')}\n`
+      );
+    }
+
+    stdout.write(
+      `${colorize('isEnabled:')} ${this.commandRegistry.isEnabled(name)}\n`
+    );
+    stdout.write(
+      `${colorize('isToggleable:')} ${this.commandRegistry.isToggleable(name)}\n`
+    );
+    stdout.write(
+      `${colorize('isVisible:')} ${this.commandRegistry.isVisible(name)}\n`
+    );
+  }
+
+  private _hasCommand(commandName: string): boolean {
+    // This is more permissive than this.commandNames() which has some commands filtered out
+    // so that they will not appear when using tab completion.
+    return this.commandRegistry.hasCommand(commandName);
+  }
+
+  /**
+   * Run JupyterLite command, throws an exception if fails.
+   * @param name
+   * @param argumentsAndValues
+   */
+  private async _runCommand(
+    name: string,
+    argumentsAndValues: string[]
+  ): Promise<void> {
+    if (!this._hasCommand(name)) {
+      throw new Error(`No such JupyterLite command: ${name}`);
+    }
+
+    // Validate argument types and values.
+    const commandArgs: PartialJSONObject = {};
+    const validArgNames = await this.argumentNames(name);
+
+    while (argumentsAndValues.length > 0) {
+      const argName = argumentsAndValues.shift()!;
+      const argValue = argumentsAndValues.shift();
+      if (!validArgNames.includes(argName)) {
+        throw new Error(
+          `JupyterLite command ${name} does not accept ${argName} argument`
+        );
+      }
+      if (argValue === undefined) {
+        throw new Error(
+          `No value given for ${argName} argument to JupyterLite command ${name}`
+        );
+      }
+      const validArgValues = await this.argumentTypeAndValues(name, argName);
+      // If nothing known about argument then cannot validate it.
+      if (validArgValues !== undefined) {
+        // validate type...
+        // may need to convert type or is string always acceptable????
+
+        if (
+          validArgValues.values !== undefined &&
+          !validArgValues.values.includes(argValue)
+        ) {
+          throw new Error(
+            `${argValue} is not valid for argument ${argName}. Acceptable values are: ${validArgValues.values.join(' ')}`
+          );
+        }
+      }
+      commandArgs[argName] = argValue;
+    }
+
+    // Validate required arguments.
+    const description = await this.commandRegistry.describedBy(name);
+    const required = description.args?.required;
+    if (required !== undefined && Array.isArray(required)) {
+      const missing = required.filter(x => !(x in commandArgs));
+      if (missing.length > 0) {
+        throw new Error(
+          `JupyterLite command ${name} is missing required argument(s): ${missing.join(' ')}`
+        );
+      }
+    }
+
+    // Run command.
+    await this.commandRegistry.execute(name, commandArgs);
+  }
+}
diff --git a/yarn.lock b/yarn.lock
index b74eae7..d815010 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2251,7 +2251,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/coreutils@npm:^6.4.3, @jupyterlab/coreutils@npm:^6.4.9, @jupyterlab/coreutils@npm:~6.4.5":
+"@jupyterlab/coreutils@npm:^6.4.3, @jupyterlab/coreutils@npm:^6.4.9":
   version: 6.4.9
   resolution: "@jupyterlab/coreutils@npm:6.4.9"
   dependencies:
@@ -2265,6 +2265,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jupyterlab/coreutils@npm:^6.5.0-beta.0, @jupyterlab/coreutils@npm:~6.5.0-beta.0":
+  version: 6.5.0-beta.0
+  resolution: "@jupyterlab/coreutils@npm:6.5.0-beta.0"
+  dependencies:
+    "@lumino/coreutils": ^2.2.1
+    "@lumino/disposable": ^2.1.4
+    "@lumino/signaling": ^2.1.4
+    minimist: ~1.2.0
+    path-browserify: ^1.0.0
+    url-parse: ~1.5.4
+  checksum: 96189ec5824a2cbd9ba70324866ae3fb3f54d432593b21404b686fb3130108b3aa30609f1ce3dbec46344547a5f3efdd6713235ed5bc044891c7c4038c527443
+  languageName: node
+  linkType: hard
+
 "@jupyterlab/docmanager@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/docmanager@npm:4.4.9"
@@ -2387,7 +2401,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/nbformat@npm:^3.0.0 || ^4.0.0-alpha.21 || ^4.0.0, @jupyterlab/nbformat@npm:^4.4.9, @jupyterlab/nbformat@npm:~4.4.5":
+"@jupyterlab/nbformat@npm:^3.0.0 || ^4.0.0-alpha.21 || ^4.0.0, @jupyterlab/nbformat@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/nbformat@npm:4.4.9"
   dependencies:
@@ -2396,6 +2410,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jupyterlab/nbformat@npm:^4.5.0-beta.0, @jupyterlab/nbformat@npm:~4.5.0-beta.0":
+  version: 4.5.0-beta.0
+  resolution: "@jupyterlab/nbformat@npm:4.5.0-beta.0"
+  dependencies:
+    "@lumino/coreutils": ^2.2.1
+  checksum: 812fb2e784be028f6f8bd6913d73877faa71e95fd1ec8a37b182238a34a0044de7d4699beb79df0e13a7bda9b443af2bf8917b89bbf523a1f3b418eef07d8c87
+  languageName: node
+  linkType: hard
+
 "@jupyterlab/notebook@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/notebook@npm:4.4.9"
@@ -2434,7 +2457,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/observables@npm:^5.4.9, @jupyterlab/observables@npm:~5.4.5":
+"@jupyterlab/observables@npm:^5.4.9":
   version: 5.4.9
   resolution: "@jupyterlab/observables@npm:5.4.9"
   dependencies:
@@ -2447,6 +2470,19 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jupyterlab/observables@npm:~5.5.0-beta.0":
+  version: 5.5.0-beta.0
+  resolution: "@jupyterlab/observables@npm:5.5.0-beta.0"
+  dependencies:
+    "@lumino/algorithm": ^2.0.3
+    "@lumino/coreutils": ^2.2.1
+    "@lumino/disposable": ^2.1.4
+    "@lumino/messaging": ^2.0.3
+    "@lumino/signaling": ^2.1.4
+  checksum: 81a93251940b8e8babea2461e68005d6faef399140758e6fb0a8a6b9fb58a08392fc7e9ab960e815669f88c19badd72a045f0f02f912b699b0f95081dd53ff1a
+  languageName: node
+  linkType: hard
+
 "@jupyterlab/outputarea@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/outputarea@npm:4.4.9"
@@ -2499,7 +2535,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/services@npm:^7.4.3, @jupyterlab/services@npm:^7.4.9, @jupyterlab/services@npm:~7.4.5":
+"@jupyterlab/services@npm:^7.4.3, @jupyterlab/services@npm:^7.4.9":
   version: 7.4.9
   resolution: "@jupyterlab/services@npm:7.4.9"
   dependencies:
@@ -2518,7 +2554,26 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/settingregistry@npm:^4.4.3, @jupyterlab/settingregistry@npm:^4.4.9, @jupyterlab/settingregistry@npm:~4.4.5":
+"@jupyterlab/services@npm:~7.5.0-beta.0":
+  version: 7.5.0-beta.0
+  resolution: "@jupyterlab/services@npm:7.5.0-beta.0"
+  dependencies:
+    "@jupyter/ydoc": ^3.1.0
+    "@jupyterlab/coreutils": ^6.5.0-beta.0
+    "@jupyterlab/nbformat": ^4.5.0-beta.0
+    "@jupyterlab/settingregistry": ^4.5.0-beta.0
+    "@jupyterlab/statedb": ^4.5.0-beta.0
+    "@lumino/coreutils": ^2.2.1
+    "@lumino/disposable": ^2.1.4
+    "@lumino/polling": ^2.1.4
+    "@lumino/properties": ^2.0.3
+    "@lumino/signaling": ^2.1.4
+    ws: ^8.11.0
+  checksum: b70f19cc4728fcbdefa5d0055ebc29b8e9fac13140bbe1491b7c14d9dddac22b4c81b4434a16cff2021f4e7d076cf35ef319912f102785311151ae2dfd033400
+  languageName: node
+  linkType: hard
+
+"@jupyterlab/settingregistry@npm:^4.4.3, @jupyterlab/settingregistry@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/settingregistry@npm:4.4.9"
   dependencies:
@@ -2537,7 +2592,26 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/statedb@npm:^4.4.9, @jupyterlab/statedb@npm:~4.4.5":
+"@jupyterlab/settingregistry@npm:^4.5.0-beta.0, @jupyterlab/settingregistry@npm:~4.5.0-beta.0":
+  version: 4.5.0-beta.0
+  resolution: "@jupyterlab/settingregistry@npm:4.5.0-beta.0"
+  dependencies:
+    "@jupyterlab/nbformat": ^4.5.0-beta.0
+    "@jupyterlab/statedb": ^4.5.0-beta.0
+    "@lumino/commands": ^2.3.2
+    "@lumino/coreutils": ^2.2.1
+    "@lumino/disposable": ^2.1.4
+    "@lumino/signaling": ^2.1.4
+    "@rjsf/utils": ^5.13.4
+    ajv: ^8.12.0
+    json5: ^2.2.3
+  peerDependencies:
+    react: ">=16"
+  checksum: 36d5a13cef8b10836654778d09b4722d11e1c9a5f1a622559284b9258942f3e0a1fbf65e85d88d2bbdc0322984fe968ec790d2e15b1a1369a23aa91229bd99b6
+  languageName: node
+  linkType: hard
+
+"@jupyterlab/statedb@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/statedb@npm:4.4.9"
   dependencies:
@@ -2550,6 +2624,19 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jupyterlab/statedb@npm:^4.5.0-beta.0, @jupyterlab/statedb@npm:~4.5.0-beta.0":
+  version: 4.5.0-beta.0
+  resolution: "@jupyterlab/statedb@npm:4.5.0-beta.0"
+  dependencies:
+    "@lumino/commands": ^2.3.2
+    "@lumino/coreutils": ^2.2.1
+    "@lumino/disposable": ^2.1.4
+    "@lumino/properties": ^2.0.3
+    "@lumino/signaling": ^2.1.4
+  checksum: 391227e8eb004395443e50c6fa64daabf6de5251071ec78cba102e0e0254a63b7167e93266c6f7fe9c8e63c3c1683eec2a5fe311dd10dc4d4276bda66296cac8
+  languageName: node
+  linkType: hard
+
 "@jupyterlab/statusbar@npm:^4.4.9":
   version: 4.4.9
   resolution: "@jupyterlab/statusbar@npm:4.4.9"
@@ -2684,97 +2771,97 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlite/contents@npm:^0.6.0, @jupyterlite/contents@npm:^0.6.4":
-  version: 0.6.4
-  resolution: "@jupyterlite/contents@npm:0.6.4"
+"@jupyterlite/contents@npm:^0.7.0-a7, @jupyterlite/contents@npm:^0.7.0-alpha.7":
+  version: 0.7.0-alpha.7
+  resolution: "@jupyterlite/contents@npm:0.7.0-alpha.7"
   dependencies:
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