This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Hendrik Mans
hmans.dev
did:plc:r5vna26rxavzyk5iuyqumdrg
It is definitely the tabs. Claude has commented a couple of times that the tabs are rendered as spaces by the Read tool. Best hope is that this is a new and temporary bug?
Random find, closed as duplicate, but all linked issues closed as wontfix:
https://github.com/anthropics/claude-code/issues/9163
2026-02-21T16:00:24.157Z