Merlin is an editor-independent tool to ease the developement of programs in OCaml. It aims at providing features available in modern IDEs such as: "as you type" error reporting, auto completion, source browsing ("jump to definition"), extraction of type, ... Merlin is available on opam and can be installed with `opam install merlin`. It can also be built from sources, which are available at https://github.com/the-lambda-church/merlin . As always you can find a full changelog at https://github.com/the-lambda-church/merlin/blob/master/CHANGELOG , but the highlights are : - Improvement in the handling of PPX syntax extensions. - The Jump command contributed by Tomasz KoƂodziejski for syntax-aware navigation: https://github.com/the-lambda-church/merlin/wiki/Jump-command - Support for MetaOCaml via the "meta" extension. - Cleanup and refactoring of the Emacs mode to fix long standing issues with concurrency. And more generally a lot of bugfixes and improvement to the existing features. We want to thank Rudi Grinberg, @Fourchaux, Christopher Reichert, David Allsopp, Nick Borden, Mario Rodas, @Twinside, Pierre Chambart, Philipp Haselwarter, Tomasz KoƂodziejski and Syohei Yoshida who all contributed to this release. We also thank JaneStreet for their continued support. The Merlin team