claude-code - 💡(How to fix) Fix [Feature Request] Add theme/background color customization per terminal instance [1 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/prmichaelsen/.local/share/claude/versions/2.1.117 (expected in multi-process scenarios)\n at Dn$ (/$bunfs/root/src/entrypoints/cli.js:2756:2177)\n at tq6 (/$bunfs/root/src/entrypoints/cli.js:2756:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T22:45:28.222Z"}]

TL;DR

To visually distinguish between different claude panes in a multi-instance session, consider configuring a unique background color or theme for each instance through claude's settings or environment variables.

Guidance

• Investigate claude's documentation for theme customization options, such as command-line flags or configuration files, to set a unique background color for each instance.
• Check if vscode provides any features for customizing the terminal appearance based on the process or command being run, which could be leveraged to differentiate claude instances.
• Review the error message for any clues on how to properly handle multi-process scenarios, as the error suggests a potential issue with lock acquisition that might be related to the desired functionality.

Notes

The provided error message seems unrelated to the desired functionality of changing the background color but indicates a potential issue with running multiple instances of claude. The solution might involve a combination of claude's configuration options and vscode's terminal customization features.

Recommendation

Apply workaround: Since there's no clear indication that an upgrade would directly address the theme customization request, and given the potential for customizing the appearance through existing settings or environment variables, applying a workaround by configuring unique themes for each instance seems like the most straightforward approach.