This progress report describes the design of the first implementation of project-wide occurrences for OCaml, a feature of editor tooling that allows users to query all the occurrences of a selected value (or type or module), anywhere in the project. This is a big step from the previous occurrences feature that only returned results in the current buffer. This work involved non-trivial patches to the compiler, dune, merlin and ocaml-lsp-server. This report describes the high-level architecture of the feature and focuses on some of the involved challenges.