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As we settle into 2026, I have been doing a little early spring-cleaning. A few years ago, we had a slightly chaotic time in opam-repository over what should have been a migration from gforge.inria.fr to a new GitLab instance. Unfortunately, some release archives effectively disappeared from official locations, and although the content was available elsewhere, the precise archives weren’t generally available, which is a problem for the checksums in opam files. We’ve had similar problems with GitHub in the past. As a ‘temporary solution’, @avsm created ocaml/opam-source-archives to house copies of these archives (I think it’s a somewhat prescient sha for that first commit!). As is so often the case with temporary solutions, it’s grown somewhat. Rather against my personal better judgement, the repo got used to house files which used to be shipped as part of ocaml/opam-repository. Removing the files from the repository was a good change, because they were always being shipped as part of opam update, but unfortunately moving them to an “archive” repository has made it rather too tempting to add new files, making an archive repository a primary source.
Extending the Pico 2 implementation to add effects-based WiFi networking and improve the build system.
Curious about the origins of opam? Check out this short history on its evolution as the de facto package manager and environment manager for OCaml. Welcome back to the opam deep-dives series! In this article, we cover two essential topics for any OCaml developer: Setting up a development environment...
What role does programming language choice make when targeting serverless environments, and how does OCaml stack up against popular serverless development languages? What would it take to make OCaml your primary development language for serverless?
A prebuilt Docker devcontainer for sandboxed OCaml and OxCaml development with Claude Code, including multiarch builds and network isolation.
I recently ported the Hardcaml_step_testbenchlibrary, one of the libraries thatwe use at Jane Street for Hardcaml simulations, from using monads to using alg...
To kick off 2026, I had clear objectives in mind: decommissioning my trusty VPS and setting up its successor. Embracing a complete paradigm shift, I built myself a container-centric, declarative, and low-maintenance setup for the years to come.
Running OCaml 5 with multicore support on bare-metal Raspberry Pi Pico 2 W (RP2350, ARM Cortex-M33).