[no_wizard]

The article isn’t a very technical one. I’d wager when they say tooling they mean any in house program they use as a tool, as opposed to what we as programmers would think of, like compilers, dev tools etc.

Ocaml has a pretty robust ecosystem of good dev tools and build tools.

[Rendello]

If you're talking about me (GP), I meant that Jane Street has built an entire ecosystem around OCaml, from their customer-facing and backend software to traditional OCaml tooling (like build systems). That being said, all I know is from the podcast I linked. I haven't touched OCaml (yet?) myself.