I've heard about this new typesetting engine from my friends and I'm immediately attracted to the intuitiveness and elegance of the typst's language - this is exactly the typesetting I need. However, after trying to typeset a lab report of mine using typst, I found its CJK typesetting somehow lacking. To be more detailed:

• The CJK line-break rule (禁则处理/禁則処理) is basically honored, but all punctuations seem to be treated as using the same size as the normal CJK characters, instead of being squashed first when applying justification.
• There's no way to specify fonts for CJK and non-CJK (e.g. Latin) characters separately.
• The first-line indent of CJK paragraphs is always 2-character, and the first line in a page will also be indented, but currently, typst doesn't indent the first line of the first paragraph.
• There's no way to switch between the basic "styles" of CJK fonts (Songti=Mincho, Heiti=Gothic, Kaiti, Fangsong, etc.) - solvable via custom functions.
• The spacing between CJK and non-CJK characters should be adjusted.
• No support for vertical typesetting.
• No support for pronunciation labeling (ruby).

Since I'm not a typesetting expert, the list can be way longer than above. Supporting proper Chinese, Japanese, and Korean typesetting is a huge project involving numerous aspects, but is definitely invaluable. Please consider taking it into consideration.

Here's some related information:

• JLREQ, CLREQ, and KLREQ : Requirements for Chinese/Japanese/Korean Text Layout;
• The documentation of the xeCJK package: the most widely used Chinese LaTeX package;
• The page of the upLaTeX engine: the most widely used Japanese LaTeX engine;
• JIS X 4051 (日本語文書の組版方法, Formatting rules for Japanese documents)
• Unicode Line Breaking Algorithm: http://unicode.org/reports/tr14/