@graeme-lockley sorry for the slow response. I don't think the use of deno is itself enough justification for adding the implementation to the main tree. However, if you can make an argument that your implementation is different in some interesting way then I would definitely consider merging it into the tree. Examples: more idiomatic, different but well accepted style of TypeScript code, better performance in some aspect, more portable, etc. Basically, the purpose of having implementations in the main repo is pedagogical; for reference and comparison (both between languages and between implementations in the same language).

Alternately, I am always happy to mention your implementation in the README even if I don't end up merging it.

Also, some implementations have multiple modes (the*_MODE variables). If you want to extend the current typescript implementation to be modal and have a "deno" mode I would be happy to consider merging that too.