- Fixed source validation, CSS parse error reporting, Ruby comment handling, and CLI stability (duplicate args, /dev/stdout hangs, source maps during watch).
- Added environment API support in @tailwindcss/vite and improved config handling (preserve theme key case, special defaults, future/experimental keys, content theme key compatibility).
- Enhanced utility canonicalization and class handling (skip utilities with top-level !, combine text/leading classes, canonicalize arbitrary utilities, validate candidates like Oxide).