Debugging

OCaml comes with a built-in debugger for the bytecode compiler. You invoke it with the ocamldebug command. See the manual for more details.
The easiest way to debug OCaml code, other than inserting print statements, is choosing bytecode as your compilation target, and using the OCaml debugger.
Additionally, one can use gdb to debug native code.
ocamlearlybird: Debug Adapter Protocol implementation for OCaml. Allows integrating the OCaml debugger with an IDE.
ocaml-dap: Generic Debug Adapter Protocol implementation in OCaml.

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