Comment by pama
My main take is exactly the opposite. Why not build everything with a simple text interface (shell command) so the models learn to use these tools natively in pretraining. Even TUI like codex-cli or claude code are needless abstractions for such use cases and make full automation hard. You could add as many observability or input layers for humans as you want but the core should be simple calls that are saved in historical and documentation logs. [the headless/noninteractive modes come close, as do the session logs]
TUI is easy to train on, but hard to use for users. Part of the reason it’s easier to have LLMs use a bunch of Unix tools for us is that their text interface is tedious and hard to remember. If you’re a top 5% expert in those tools it doesn’t matter as much I guess but most people aren’t.
Even a full-featured TUI like Claude Code is highly limited compared to a visual UI. Conversation branching, selectively applying edits, flipping between files, all are things visual UI does fine that are extremely tedious in TUI.
Overall it comes down to the fact that people have to use TUI and that’s more important than it being easy to train, and there’s a reason we use websites and not terminals for rich applications these days.