I just added a TUI built on Charm for my custom agent. I primarily use it for two things.

1. Navigating all my chat sessions and doing admin work. It's super fast to push a single key to go in and see what it was about before deleting it.

2. Testing out features and code changes without the web UI / vs code extension complexity.

3. Places where I cannot connect VS Code. I still want to chat and see diffs, a TUI is much easier than a CLI for this.

It also has a CLI, basically three interfaces (CLI, TUI, GUI (vscode/webapp)) to the core features of my personal swiss army knife (https://github.com/hofstadter-io/hof)