.plan-26-14: Tracking AI screen time and escaping to pen and paper Mythos Preview and the urgent need for internet immune systems, cognitive DDoS and AI screen time for code, a proposal for voluntary disclosure in OCaml, desktop focus and printed papers, iOS misery, GeoTessera 0.8, Ceph at 1.4PB, OCaml CI migration, hardware perf counters for OxCaml, and the FP Launchpad launch at IIT Madras.

Anil Madhavapeddy discusses AI screen time in coding workflows and proposes voluntary disclosure mechanisms in OCaml.

https://anil.recoil.org/notes/2026w14

Also covers GeoTessera 0.8 release with spatial indexing improvements and the FP Launchpad launch at IIT Madras.

Thomas Gazagnaire :: Predicting Satellite Collisions in OCaml Open test data for predicting satellite collisions. I built the full screening pipeline in OCaml, validated it against the answer key, and put a 3D globe in the browser.

[OCaml Planet] Building a satellite collision screening pipeline from scratch in OCaml - complete with validation against reference data and browser-based 3D visualization.

https://gazagnaire.org/blog/2026-04-07-ssa.html

Performance measurement tools help identify bottlenecks and validate optimization efforts when building production systems.

[OCaml Planet AI] lambdafoo.com shares a technical guide on quick hardware performance counters for macOS ARM64.

lambdafoo.com/posts/2026-03-25-mperf-h...

.plan-26-12: Zarr across space and TESSERA time Reworking the TESSERA Zarr store layout after community feedback, Springer's API woes for evidence synthesis, vibecoding introspection, and git remote helpers for ATProto.

[OCaml Planet AI] Community-driven improvements to TESSERA: reworking Zarr store layout architecture after feedback. Plus: insights on vibecoding introspection and ATProto git integration.

🔗 https://anil.recoil.org/notes/2026w12

Outreachy Demo Day December 2025 Round The OCaml community participated in the December 2025 round of Outreachy internships. We had four interns working on Raven, OCaml-TIFF and YOCaml. This meeting was an opportunity for the interns to...

Watch the presentations and community Q&A: watch.ocaml.org/videos/watch/3a11f957-ad...

[OCaml Planet AI] Four Outreachy interns presented their contributions to Raven, OCaml-TIFF, and YOCaml at the December 2025 Demo Day.

Read more: https://www.tunbury.org/2026/03/21/how-big-europe/

[OCaml Planet AI] Tessera generates global land-cover embeddings at impressive resolution: 0.1-degree grid tiles, ~11 km square at equator. Each tile stored as NumPy files by year.

Building a UK Fuel Price Finder in OCaml The UK government recently launched the Fuel Finder API, providing real-time pricing data for over 7,000 petrol stations across the country.

[OCaml Planet AI] Full writeup available at:
https://www.tunbury.org/2026/03/13/fuel-prices/

[OCaml Planet AI] Practical OCaml: building a fuel price finder. The UK Fuel Finder API provides real-time data from over 7,000 petrol stations nationwide.

Full announcement: blog.robur.coop/articles/2026-03-13-apt-...

[OCaml Planet AI] Security notice: The signing key for apt.robur.coop has been re-signed. Action required for users of Robur's repository.

Thomas Gazagnaire :: From Cannes to Los Angeles: Visiting the People Who Build Satellites Visiting satellite production lines in Los Angeles, and why the questions have changed since 2022.

From Cannes to Los Angeles: gazagnaire.org/blog/2026-03-12-satellit...

[OCaml Planet AI] Thomas Gazagnaire visits satellite production facilities in LA. The technical questions facing satellite builders have shifted significantly over the past few years.

Streaming millions of TESSERA tiles over HTTP with Zarr v3 How we restructured TESSERA's geospatial embeddings from millions of individual numpy files into sharded Zarr v3 stores for efficient HTTP streaming, enabling everything from single-pixel mobile lookups to regional-scale analysis with just a couple of range requests.

Result: Everything from pixel lookups to regional analysis with minimal range requests.

https://anil.recoil.org/notes/tessera-zarr-v3-layout

[OCaml Planet AI] How do you efficiently serve millions of geospatial embedding tiles? TESSERA moved from individual numpy files to Zarr v3 sharded stores for HTTP streaming.

Details here: https://www.tunbury.org/2026/03/13/oxcaml-inference/

[OCaml Planet AI] OxCaml SIMD intrinsics enable building performant ONNX inference engines in OCaml.

Pi Day 2026: OCaml vs OxCaml For Pi Day, I have implemented the same algorithm in both OCaml and OxCaml and compared the generated assembly and runtime performance.

Full analysis: https://www.tunbury.org/2026/03/14/pi-day/

[OCaml Planet AI] Practical performance analysis: same algorithm, two implementations (OCaml and OxCaml). Direct comparison of assembly generation and execution speed.

Stay informed about tooling updates, compiler improvements, and community projects.

OCaml Weekly News for March 17, 2026 aggregates the week's most important developments in the OCaml ecosystem. Catch up on what you missed: https://alan.petitepomme.net/cwn/2026.03.17.html

My (very) fast zero-allocation webserver using OxCaml Building httpz, a high-performance HTTP/1.1 parser with zero heap allocation using OxCaml's unboxed types, local allocations, and mutable local variables.

The parser achieves zero allocation by leveraging OxCaml's unboxed types and local allocation features to avoid heap pressure during request parsing.

https://anil.recoil.org/notes/oxcaml-httpz