I've seen that deno does not anymore require package.json (supported by npm/yarn) to describe its dependencies.
But for build/run scripts, is package.json the proposed descriptor or is there any other build tool/descriptor format that better suits?
Deno doesn't support package.json.
Currently, there's no built-in nor recommended build tool, but you can use any build tool of your preference: Make, npm scripts, etc.
There are some packages that aim to be a alternative to npm scripts for Deno, such as
Take a look at Drake (https://deno.land/x/drake), a Make-like task runner I wrote for Deno, inspired by Make, Rake and Jake.
