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The OCaml Planet

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Apache Parquet Files

If you haven’t discovered the Apache Parquet file format, allow me to introduce it along with ClickHouse.

17 Sep 2025

Marc Elvers

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FreeBSD unionfs deadlock

FreeBSD Jails provide isolated system containers that are perfect for CI testing. Miod ported OBuilder to FreeBSD back in 2023. I have been looking at some different approaches using unionfs.

17 Sep 2025

Marc Elvers

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A first foray into agentic coding

I’ve been largely steering clear of the AI bandwagon up to now, mainly because the last thing I needed while working on Relocatable OCaml was to be trying to learn a new tool at the same time as finishing something which felt desperately late and which, at times, I myself didn’t fully understand! However, as the buzz of the announcement dies down, I had a first go at pointing Claude Code to the OCaml compiler codebase, and thought I’d add to the general noise of AI memoirs…

17 Sep 2025

David Allsopp's Blog

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Relocatable OCaml - from concept to demo to PRs

If you give vapourware long enough, it condenses into an actual ware! An idea hatched between rehearsing Handel arias in the outskirts of Munich just over six years ago to make running OCaml’s programs a little less surprising is now 132 commits of reality.

15 Sep 2025

David Allsopp's Blog

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Shipping a robust DB migration runner for Chaufr (OCaml + Caqti + Lwt)

Implemented a production-minded database migration system for Chaufr: CLI, tracking, checksum validation, rollback, and safe SQL execution.

14 Sep 2025

Chukwuma Akunyili

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FUN OCaml 2025 - Join us in Warsaw, Poland on September 15 for a day full of presentations!

Fun OCaml 2025 is a 2 days open source hacking event dedicated to OCaml enthusiasts and professionals around the globe! This is day 1 and we're live-streaming all the presentations! For the schedule, see https://fun-ocaml.com#schedule.

12 Sep 2025

FUN OCaml

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Dynamic Formal Verification in OCaml: An Ortac/QCheck-STM Tutorial

We introduce the Ortac/QCheck-STM, a tool to automatically generate QCheck-STM tests based on Gospel specification, in a tutorial-like manner.

10 Sep 2025

Tarides

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Caching opam solutions

09 Sep 2025

Jon Ludlam's Blog at recoil.org

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