Terminal missing multiple line support when using AI cli

[javaspeak]

Describe the bug

When I go to STS (eclipse) terminal and type "codex" in it - I am given the codex prompt. However I cannot write multiple line instructions to codex. I have tried pressing "cmd + return", "option + return" but none of them allow me to write a multiple line instruction to codex. This is very frustrating.

Note codex is the cli for chat gpt 5

In something like VS Code's terminal I can add a multiple line instruction by pressing the "option" key and return - I am on a mac.

The STS eclpse terminal itself is also sluggish - i.e. often I write faster than the characters are rendered which is annoying.

My work around has been to not use STS (eclipse) terminal until this problem is fixed.

To Reproduce

Type "codex" at the terminal and try to add a multiple line instruction.

Sample

There is no need for sample code.

[laeubi]

Note codex is the cli for chat gpt 5

Then I somehow fear you need to report this to codex.

There is a similar issue for the copilot-cli:

• Add Ctrl+J for new line github/copilot-cli#660
• CLI should support multi-line mode in input box github/copilot-cli#14
• /terminal-setup inside Dev Container and Codespaces writes keybindings to wrong file github/copilot-cli#657

so it all seem to depend on the terminal type (what is usually /bin/sh in linux/mac and cmd.exe in windows).

Also note that STS (= Spring Tools ??) seem to be an own Eclipse Product so they might have configured it differently or using things differently.

So in general this statement ...

There is no need for sample code.

... is wrong. One would need to reproduce the behavior (faster typing, missing command codes, ...) with a plain terminal without spring or codex.

[javaspeak]

@laeubi - claude and codex (chapt gpt 5) work in VS Code but do not work in eclipse or STS in the terminal.

Seeing as the terminal of STS is very sluggish I would argue that the terminal has a big issue anyway. When updated it could change to support claude and codex in the same way other IDE's do?

Why not just change the eclipse terminal so that it supports claude and codex like 99% of all IDE's?

AI is becoming so important that one cannot even get a coding job without good AI skills - therefore I would have thought this issue pretty important?

I think that going back to claude or codex is the right thing to do. If the eclipse terminal was super hot and well featured I could consider that, but currently it is not - it has big issues with responsiveness.

Thank you for your time.

[iloveeclipse]

@javaspeak : if you don't want to provide reproducer, please consider to close this ticket.

[laeubi]

Why not just change the eclipse terminal so that it supports claude and codex like 99% of all IDE's?

Contributions are always welcome ;-)

Apart from that for me (on Linux) the Terminal works quite well ... and I have no mac at hand to test anything on mac specifically.