lms chat - Add shortcuts

[rugvedS07]

Overview

This PR implements the following shortcuts in input in lms chat:

All Platforms (Common)

• Ctrl+D - Exit (if input empty)

Deletion:

• Delete - Delete after cursor
• Ctrl+W - Delete word backward (also works as Ctrl+Backspace)
• Alt+Backspace - Delete word backward
• Alt+Arrow / Option+Arrow - Move cursor word direction

macOS/Linux Only

Navigation:

• Ctrl+A - Move cursor to line start (also works as Cmd+LeftArrow)
• Ctrl+E - Move cursor to line end (also works as Cmd+RightArrow)
• Ctrl+B - Move cursor left by character
• Ctrl+F - Move cursor right by character
• Alt+B / Cmd+B - Move cursor word left
• Alt+F / Cmd+F - Move cursor word right

Deletion:

• Ctrl+D - Delete after cursor
• Ctrl+U - Delete to line start (Cmd+Backspace in Mac)
• Ctrl+K - Delete to line end (Cmd+Delete in Mac)

Windows/Linux Only

Navigation:

• Ctrl+Left - Move cursor word left
• Ctrl+Right - Move cursor word right

Windows Only

• Alt+Delete - Delete word forward

Linux Only

• Alt+D - Delete word forward

Video with debug log statements to demonstrate

Screen.Recording.2025-12-23.at.3.38.32.PM.mov

Needs lmstudio-ai/lmstudio-js#502

[will-lms]

Is the cursor supposed to have a "T" in it?

[will-lms]

I typed /load to try to load a model. It seems we don't support that. I keep pressing backspace to delete, and get stuck being unable to delete past /lo.

Now I cannot delete anything with backspace. I can go to beginning of line with shortcuts, and Ctrl+K to kill line (works), then I can't delete anything when I start typing again

[will-lms]

Even fresh with a new command prompt (after quiting and re-starting lms) I cannot delete anything.

[rugvedS07]

Is the cursor supposed to have a "T" in it?

Interesting how in my VSCode I see it in solarized dark

[will-lms]

Not blocking, but we should support Ctrl + Z for suspending the lms chat process.

[will-lms]

When I Meta + f over a pasted block, the cursor jumps to the end of the word following the block. I would have expected it to jump just over the paste block and be at the start of the word following (i.e. start of My in this video).

Screen.Recording.2026-01-12.at.12.03.26.PM.mov

[rugvedS07]

Tweaked!

Screen.Recording.2026-01-12.at.12.18.56.PM.mov