diff --git a/.src/index.ts b/.src/index.ts
new file mode 100644
index 0000000..d165145
--- /dev/null
+++ b/.src/index.ts
@@ -0,0 +1,40 @@
+#!/usr/bin/env node
+
+import { Command } from 'commander';
+import chalk from 'chalk';
+import {
+  createCreateCommand,
+  createListCommand,
+  createStatusCommand,
+  createMergeCommand,
+  createDestroyCommand,
+  createDiffCommand
+} from './commands';
+import { loadGlobalConfig } from './utils/file-utils';
+
+const program = new Command();
+
+program
+  .name('git-agent-sync')
+  .alias('gas')
+  .description('Manage isolated git worktrees for AI coding agents')
+  .version('1.0.0')
+  .addCommand(createCreateCommand())
+  .addCommand(createListCommand())
+  .addCommand(createStatusCommand())
+  .addCommand(createMergeCommand())
+  .addCommand(createDestroyCommand())
+  .addCommand(createDiffCommand())
+  .configureHelp({
+    subcommandTerm: (cmd) => cmd.name(),
+    argumentTerm: (arg) => `<${arg}>`,
+    optionTerm: (opt) => opt.short ? `-${opt.short}, --${opt.long}` : `--${opt.long}`
+  })
+  .addHelpCommand('help', 'Show help for a command');
+
+program.parse();
+
+process.on('unhandledRejection', (reason: any) => {
+  console.error(chalk.red('\n❌ Unhandled error:'), reason?.message || reason);
+  process.exit(1);
+});