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John Coene

@john-coene.com

780 followers 120 following 77 posts

Go, Javascript, Vapour, R, working on opifex.org

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John Coene @john-coene.com · May 29

New site who dis?

opifex.org

Opifex - R, Go & AI Software Development

Swiss-based software development agency specializing in R, Go, JavaScript and AI technologies. Building bespoke solutions and contributing to open-source.

opifex.org

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Reposted by John Coene

Davis Vaughan @davisvaughan.bsky.social · 6d

It is not internal! It is something I've been iterating on to help with performance based PRs in vctrs and elsewhere. I have gotten enough questions about it that I should probably release it for real at some point, but feel free to use it github.com/DavisVaughan...

GitHub - DavisVaughan/cross: Run Functions Across Package Versions

Run Functions Across Package Versions. Contribute to DavisVaughan/cross development by creating an account on GitHub.

github.com

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John Coene @john-coene.com · 6d

Ooooooooh thanks for the SHtuff @posit.co, I love it!

John Coene @john-coene.com · 13d

False dichotomy, it's great fun and works well: we've built real stuff with it.
mwavu.com
rrr.is

John Coene @john-coene.com · 13d

Nice work, and thanks for sharing it! Do not hesitate to reach out to us if you have questions.

John Coene @john-coene.com · 13d

Did you know that the A in FAANG stands for Ambiorix?

(and the R is for #rstats)

github.com/ambiorix-web...

GitHub - ambiorix-web/ambiorix: 🖥️ Web framework for R

🖥️ Web framework for R. Contribute to ambiorix-web/ambiorix development by creating an account on GitHub.

github.com

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John Coene @john-coene.com · 16d

Built a rate limiter for Ambiorix with the help of Claude.

Still bullish on Ambiorix, it's genuinely pleasant to work with.

github.com/ambiorix-web...

GitHub - ambiorix-web/limiter: Rate limiter

Rate limiter. Contribute to ambiorix-web/limiter development by creating an account on GitHub.

github.com

John Coene @john-coene.com · 22d

I MAED A TYPO IN THIS DOMAIN NAME I BOUGHT !! !

I knew THERE WAS NO WAY it was still available.

I went to bed thinking I was going to be a millionaire.

ffs

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John Coene @john-coene.com · 24d

The latest version of Styler now supports defining custom shorthands, e.g.: m-t-1 for margin-top-1

It's a really simple tool but I find it thoroughly enjoyable to build and use.

github.com/devOpifex/st...

GitHub - devOpifex/styler: Lightweight CSS Utility

Lightweight CSS Utility. Contribute to devOpifex/styler development by creating an account on GitHub.

github.com

John Coene @john-coene.com · Aug 21

Microsoft marketing again: Copilot is a spastic.

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John Coene @john-coene.com · Aug 7

8 years ago I created "marat," a Jekyll theme to "revive the values of the enlightenment." 🤷‍♂️

I haven't pushed a single commit since and yet it's still being used by others and the demo is still up...

marat.john-coene.com

Reposted by John Coene

mdsumner @mdsumner.bsky.social · Aug 1

here it is

researchspace.auckland.ac.nz/items/9dd448...

researchspace.auckland.ac.nz

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Reposted by John Coene

Тsфdiиg @tsoding.bsky.social · Jul 26

The long term value of Recreational Programming (apart from enabling you to enjoy what you are doing again) comes from allowing you to explore unusual things outside of the local optimum that the market pressure forces you into.

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John Coene @john-coene.com · Jul 24

Had not seen, was expecting a "nix fixes this," have we found the one thing it doesn't fix?

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John Coene @john-coene.com · Jul 24

Rstudio package manager bundles binaries for Linux too

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John Coene @john-coene.com · Jul 24

Tell him @brodriguesco.bsky.social

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John Coene @john-coene.com · Jul 15

Nice work!

Reposted by John Coene

Tomasz Kalinowski @t-kalinowski.bsky.social · Jul 15

#ragnar 0.2.0 is on CRAN #rstats!

It has a MUCH improved chunker; markdown_chunk() picks better boundaries, builds context, segments by headings, and handles overlapping chunks. Oh, and ragnar_retrieve() can deoverlap retrieved chunks now.

Website got a big update too: ragnar.tidyverse.org

Retrieval-Augmented Generation (RAG) Workflows

Provides tools for implementing Retrieval-Augmented Generation (RAG) workflows with Large Language Models (LLM). Includes functions for document processing, text chunking, embedding generation, storag...

ragnar.tidyverse.org

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Reposted by John Coene

Kyle Walker @kylewalker.bsky.social · Jul 11

Despite claims that "R is dead" on social media, 2025 has been an incredible year for #rstats:

💻 {ellmer} wrapping LLM APIs;
💻 {mcptools} & {mcpr} implementing MCP connections for R;
💻 Native parallel processing in {purrr} via {mirai}

What else are you excited about?

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John Coene @john-coene.com · Jul 12

For compatibility with S

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Reposted by John Coene

coolbutuseless @coolbutuseless.fosstodon.org.ap.brid.gy · Jul 2

Introducing {zap} - a new serialization framework for #rstats

* uses type-specfic transformations + #zstd
* for 'diamonds' dataset, it is more compressed than 'saveRDS(xz)' and faster than 'saveRDS(compress=FALSE)

https://github.com/coolbutuseless/zap
https://coolbutuseless.r-universe.dev/zap

A graph comparing various compression options for the 'diamonds' dataset in R. 'zap' shows high compression at fast speeds.

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John Coene @john-coene.com · Jun 27

Again, pretty cool!

Simon P. Couch @simonpcouch.com · Jun 27

vitals, an R package for LLM evaluation, is now on #rstats CRAN!🧸 Specifically aimed at folks building with ellmer, the package will help you engineer prompts, choose models, and measure cost/latency/performance rigorously.

www.tidyverse.org/blog/2025/06...

Introducing vitals, a toolkit for evaluating LLM products in R

The first release of vitals, a package for large language model evaluation in R, just made it to CRAN.

www.tidyverse.org

John Coene @john-coene.com · Jun 27

The five of us at the workshop would have loved it!

John Coene @john-coene.com · Jun 20

You can now use @type and @mcp in your #rstats package documentation to generate an MCP from your functions on devtools::document().

github.com/devOpifex/mcpr

GitHub - devOpifex/mcpr: Model Context Protocol server and client for R

Model Context Protocol server and client for R. Contribute to devOpifex/mcpr development by creating an account on GitHub.

github.com

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Reposted by John Coene

Posit @posit.co · Jun 18

Data science junkies, get ready! 🚀 "The Test Set" #podcast trailer is here for your viewing pleasure.

Tune in July 1st and every Tuesday after for new episodes with hosts @mchow.com, @hadley.nz, and @wesmckinney.com as they welcome thought leaders in #DataScience.

Subscribe now: pos.it/thetestset

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John Coene @john-coene.com · Jun 18

That one is not subsettable either :(

Hadley Wickham @hadley.nz · Jun 18

New to me is the term "premature closure", where you too quickly latch on to the first solution you see. Always a danger in coding, but particularly so today when LLMs can give you a plausible fix so so quickly.

www.shayon.dev/post/2025/16...

Pitfalls of premature closure with LLM assisted coding

When LLM models generates clean, professional-looking code, it's tempting to stop exploring alternatives. But therein lies the risks that comes with premature closure. So what is premature closure?

www.shayon.dev

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