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Neocaml 0.6: Opam, Dune, and More

When I released neocaml 0.1 last month, I thought I was more or less done with the (main) features for the foreseeable future. The original scope was deliberately small โ€” a couple of Tree-sitter-powered OCaml major modes (for .ml and .mli), a REPL integration, and not much else. I was quite happy with how things turned out and figured the next steps would be mostly polish and bug fixes.

7 April 2026 at 08:12 am
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Neocaml 0.6: Opam, Dune, and More

The release of Neocaml 0.6 has brought significant enhancements to the OCaml development experience within the Neovim editor. Initially, the project aimed to provide a minimal yet functional setup with Tree-sitter-powered major modes for .ml and .mli files, along with REPL integration. However, the developer's vision for the tool has expanded, incorporating new features such as integration with Opam and Dune, the OCaml build system.

One of the key additions in Neocaml 0.6 is the seamless integration with Opam, the OCaml package manager. This feature allows developers to easily manage their project dependencies directly from within Neovim. With Opam support, users can install, upgrade, and remove packages without leaving their editor, streamlining the development workflow. The integration also includes autocompletion for Opam packages, making it easier to discover and utilize available libraries.

Another major enhancement is the support for Dune, the official build system for OCaml. Dune provides a flexible and powerful way to manage OCaml projects, offering features such as dependency resolution, build automation, and project configuration. Neocaml 0.6 now includes features that help users navigate and manage Dune projects more efficiently. This includes autocompletion for Dune commands, project files, and configuration options, as well as improved error highlighting and diagnostics.

In addition to these new features, Neocaml 0.6 also includes several improvements to the existing functionality. The Tree-sitter-powered major modes have been refined to provide better code completion, syntax highlighting, and error checking. The REPL integration has been enhanced to support more advanced features, such as code evaluation in the background and improved debugging support.

The developer has also focused on stability and performance, addressing numerous bugs and optimizing the overall performance of the plugin. These improvements ensure that Neocaml remains a reliable and efficient tool for OCaml development within Neovim.

The expansion of Neocaml's feature set from its initial release demonstrates the growing interest and demand for robust OCaml development tools within the Neovim ecosystem. By integrating with Opam and Dune, Neocaml has become an even more powerful and versatile option for OCaml developers, offering a comprehensive set of features that cater to both beginners and experienced users.

Looking ahead, the developer plans to continue enhancing Neocaml with additional features and improvements. This includes further refinements to the Tree-sitter integration, expanded support for OCaml features, and continued optimization for performance and stability. The goal is to make Neocaml the go-to choice for OCaml development within Neovim, providing a seamless and efficient development experience for users.

In conclusion, the release of Neocaml 0.6 represents a significant milestone in the project's evolution. With the addition of Opam and Dune integration, as well as improvements to existing features, Neocaml has become an even more valuable tool for OCaml developers. As the project continues to grow and evolve, it promises to offer a comprehensive and efficient solution for OCaml development within the Neovim editor.

Source: OCaml Planet
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