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Moving to opam 2.5

opam 2.5.0 was released on 27th November, and this update needs to be propagated through the CI infrastructure. This post mirrors the steps taken for the release of opam 2.4.1.

12 Jan 2026

Marc Elvers

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Base Fibonacci

In Numberphile’s latest video, Tony Padilla does a ‘magic trick’ with Fibonacci numbers and talks about Zeckendorf decompositions, and I had my laptop out even before the video ended.

11 Jan 2026

Marc Elvers

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OCaml Roundup: December 2025

11 Jan 2026

Patrick Ferris' OCaml Blog

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More OCaml on Pi Pico 2 W

Extending the Pico 2 implementation to add effects-based WiFi networking and improve the build system.

10 Jan 2026

Marc Elvers

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Opam 104: Sharing Your Code

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...

08 Jan 2026

OCamlPro

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Devcontainer for using O(x)Caml and Claude in your projects

A prebuilt Docker devcontainer for sandboxed OCaml and OxCaml development with Claude Code, including multiarch builds and network isolation.

08 Jan 2026

Anil Madhavapeddy's Blog

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What would make OCaml serverless ready?

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?

08 Jan 2026

Chris Armstrong

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Fun with Algebraic Effects - from Toy Examples to Hardcaml Simulations

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...

06 Jan 2026

Jane Street Tech Blog

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