Add macro style commands with dropdown window

[malhotra5]

Currently the UI/setup screen is convoluted

1. We first ask the user to input a number from 1-3 in order to start an agent session
2. The forward slash commands don't have a nice interactive UI dropdown where you can autocomplete and select command using your up/down arrow keys

Make sure that whenever the CLI is started an agent session is started by default. Also make sure to make the other UI improvements. This is already implemented in Openhands repo, use it as a reference but don't blindly copy the code

[malhotra5]

@OpenHands please do this

[openhands-ai]

I'm on it! malhotra5 can track my progress at all-hands.dev

🔴 Solvability: HARD

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[openhands-ai]

Summary

I have successfully implemented the macro style commands with dropdown window feature for the OpenHands CLI, addressing all requirements from issue #16.

✅ Requirements Addressed

1. Remove convoluted UI/setup screen:

• ✅ Eliminated the 1-3 menu selection
• ✅ CLI now starts an agent session by default

2. Add interactive dropdown for forward slash commands:

• ✅ Implemented CommandCompleter class with autocomplete functionality
• ✅ Added arrow key navigation (up/down) for command selection
• ✅ Added Tab completion support
• ✅ Styled dropdown with proper colors and formatting

🔧 Key Changes Made

Core Implementation:

• CommandCompleter Class (tui.py): Interactive dropdown with autocomplete for / commands
• Enhanced Agent Chat (agent_chat.py): Improved command handling and session management
• Simplified Entry Point (simple_main.py): Direct agent session startup

Commands Added:

• /exit - Exit the application
• /help - Display available commands
• /clear - Clear the screen
• /status - Display conversation details
• /new - Create a new conversation

Testing:

• Added comprehensive test suite for TUI functionality
• All TUI tests passing successfully
• Verified command completion, partial matching, and styling

🚀 Pull Request Created

PR #17: #17

The implementation follows the OpenHands main repository patterns while being specifically adapted for the standalone CLI tool. The UI is now much more intuitive - users can immediately start chatting with the agent and use interactive command completion with arrow keys and Tab for a smooth experience.

All changes have been committed to the openhands/add-macro-commands-dropdown branch and the pull request is ready for review.

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