Blog

The OCaml Planet RSS

Articles and videos contributed by both experts, companies and passionate developers from the OCaml community. From in-depth technical articles, project highlights, community news, or insights into Open Source projects, the OCaml Planet RSS feed aggregator has something for everyone.

Want your Blog Posts or Videos to Show Here?

To contribute a blog post, or add your RSS feed, check out the Contributing Guide on GitHub.

One year at Ahrefs

I started working at Ahrefs one year ago. When I applied I had heard of them from OCaml’s discuss amongst other OCaml community spaces and…

06 Oct 2025

Ahrefs

Read Article
Attempting overlayfs with macFuse

It would be great if overlayFS or unionFS worked on macOS! Initially, I attempted to use DYLD_INTERPOSE, but I wasn’t able to intercept enough system calls to get it to work. However, macFuse provides a way to implement our own userspace file systems. Patrick previously wrote obuilder-fs, which implemented a per-user filesystem redirection. It would be interesting to extend this concept to provide an overlayfs-style implementation.

06 Oct 2025

Marc Elvers

Read Article
Mental Check: Reflecting on the OCaml Journey So Far

A reflection on my OCaml web development journey so far.

05 Oct 2025

Chukwuma Akunyili

Read Article
Ocsigen: A Full OCaml Framework for Websites and Apps

Discover the OCaml web development framework Ocsigen, from its origins to its many helpful features!

02 Oct 2025

Tarides

Read Article
File descriptors as integers considered harmful

Continuing the previous foray into file descriptors, and trying to remove Obj.magic both from ocaml-uring’s code itself, and from the recommended way for using it.

01 Oct 2025

David Allsopp's Blog

Read Article
Hacking OCaml

This talk breaks down a CTF puzzle Corwin de Zahr designed a few years back that involves finding problems and vulnerabilities within the OCaml runtime. Read the full transcript here: https://www.janestreet.com/tech-talks/hacking-ocaml/

30 Sep 2025

Jane Street - Tech Talks

View Video
File descriptors are not integers

There was a flurry of activity on ocaml-multicore/ocaml-uring this month leading to a release (ocaml/opam-repository#28604). ocaml-uring provides bindings to the Linux’s io_uring, which allows batching various syscalls to the kernel for it to execute out-of-order, and in parallel. Its principal use at the moment is for the high-performance Linux backend of Eio.

30 Sep 2025

David Allsopp's Blog

Read Article
Model Validation & Time Utilities Sprint: From Basic Models to Proper Validation Layer

A weekend sprint documenting the evolution from basic OCaml models to comprehensive validation infrastructure with field enhancements, time utilities, and cryptographic security improvements for the Chaufr MVP

28 Sep 2025

Chukwuma Akunyili

Read Article
A second foray into agentic coding

Continuing the previous theme of dabbling with matters agentic. Previously, I’d quite assiduously kept my fingers away from files. This time, I wanted to try something exploratory, switching to the agent for things I was actively stuck on.

28 Sep 2025

David Allsopp's Blog

Read Article