> high-accuracy syntax highlighter (called Tree-sitter)

Just wanted to note that tree-sitter is lower-level and more general: it's an incremental parser that is specialised for gracefully and efficiently parsing partially-correct code snippets or code being edited live.

It's an important building block of the highlighter, but it needs more on top to complete the package. It can be used for anything that requires awareness of code structure in an editor.