Japanese input UX improvements

[nkmr-jp]

Hello! When I enter Japanese characters in the prompt input form of the claude command's interactive session, the text appears in a different location from the input form. Pressing Enter enters the text correctly, so there is no problem with usage, but the UX is not good, so I would like this to be improved.

Like this

https://github.com/user-attachments/assets/ee7e3d1b-7357-413a-9426-f4d174a49420

When entering directly from the console, Japanese text is entered at the cursor position. This is the expected behavior.

https://github.com/user-attachments/assets/54475603-3287-4519-8a5b-fe45fe026043

Environment:

Claude Code Version: 1.0.3

OS: macOS Sequoia Version 15.3.2

Shell: zsh

Editor : GoLand 2025.1 (Build #GO-251.23774.430, built on April 14, 2025) (The same behavior occurs in the default Mac terminal.)

IME: MacOS default IME (The same behavior occurs in the popular Japanese input method editor “Google Japanese Input” in Japan.)

[Eiji-Kudo]

I need this 👍

[nkmr-jp]

I've created an app that makes Japanese input easier, so I'd like to share it.

It's an input-only app that can be used quickly and easily, like a launcher app. https://github.com/nkmr-jp/prompt-line

For me personally, this has completely eliminated the stress of Japanese input.

While this does not solve the issues with Claude Code itself, I think it is one of the effective approaches to various issues related to Japanese input UX at this point. ( #1547 #1697 #2054 #2335 #2339 #2478 #2566, etc.)

[github-actions[bot]]

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