I'm happy to share `ir`, a new command-line tool for running portable R scripts and Quarto documents. It's inspired by my two favorite parts of `uv`: self-describing scripts and tools you can run without installing first. opensource.posit.co/blog/2026-07...

ir 0.1.0: self-describing R scripts and Quarto documents

`ir` is a new command-line tool for running portable R scripts and rendering Quarto documents whose package requirements, and optional R selection, live inside the file itself.

opensource.posit.co

I’m at useR! in Warsaw this week and talking about mcp-repl, an MCP server that gives agents sandboxed Python and R sessions: github.com/posit-dev/mc... Come say hi if you want to chat about AI tooling, deep learning in R — keras3, torch, jax, r-xla — or, of course, S7!

@t-kalinowski.bsky.social saved me all the headaches mentioning py_require a few weeks ago. It saves so much time & works great 💯

Ambassador Frank Hull@frankiethull.bsky.social · 2mo ago

reticulate::py_require is all you need

YAML deserves a defense! opensource.posit.co/blog/2026-05... The complaints are real but historical as they describe YAML 1.1, not the 1.2 spec that fixed them in 2009. The post traces the full history and introduces py-yaml12, a fast Rust-backed Python library for the modern spec. Hope you enjoy!

In Defense of YAML

A common refrain among developers: YAML is bad and TOML is good. This post argues otherwise, tracing the history of configuration formats, examining what YAML 1.2 actually fixed, and introducing py-ya...

opensource.posit.co

Just published a new blogpost on torch for #rstats updates: opensource.posit.co/blog/2026-04...

I am excited beyond description to lift the veil on what we have been working on in 2026: Please meet ggsql! A new extension of the SQL language for creating visualisations using the grammar of graphics. Read all about it in the blog post or visit the website at ggsql.org

ggsql: A grammar of graphics for SQL

Introducing ggsql, a grammar of graphics for SQL that lets you describe visualizations directly inside SQL queries.

opensource.posit.co

We just released raghilda to PyPi. Raghilda is a framework for building RAG systems in #python. See the release blogpost: opensource.posit.co/blog/2026-04...

RAG with raghilda

An introduction to building retrieval-augmented generation systems with raghilda.

opensource.posit.co

We just released a blog post about something I'm very excited about: Great Docs. Post is in the *new* Posit Open Source site: opensource.posit.co/blog/2026-04... Great Docs is a #python pkg for creating beautiful Python package websites. We make it easy to use but also give you lots of options.

Introducing Great Docs: Beautiful Documentation for Python Packages

Great Docs is a new documentation site generator for Python packages. It auto-discovers your API, builds a modern site with Quarto, and ships with LLM-friendly features and one-command deployment.

opensource.posit.co

Using {reticulate} and referencing R objects in Python with r.* and Python objects in R with py$* feels like God mode. #Rstats #Python

Our list of 2026 #rstats and #python summer internships has been posted. We can't wait to work with you and make great things! tidyverse.org/blog/2026/03...

2026 Posit Internships

Posit is sponsoring four summer internship positions in 2026.

tidyverse.org

Anyone else spoiled by R's pkgdown and find python's mkdocs or sphinx a bit tedious and config-heavy. Check out @richmeister.bsky.social 's awesome new {great-docs} as a batteries-included alternative to spin up an effective docs site in <15 min! 1/n 🧵 github.com/posit-dev/gr...

GitHub - posit-dev/great-docs: Great Docs lets you easily build a Python package docs site

Great Docs lets you easily build a Python package docs site - posit-dev/great-docs

github.com

Meet Posit AI. Built for data scientists who want AI inside their RStudio workflow. Instead of black-box suggestions, Posit AI helps generate code you can inspect, understand, and rerun. Learn more: posit.co/products/ai?...

New: mirai skill for AI coding agents 🤖 Use with Claude Code/Codex/Cursor for writing async/parallel R code. Covers explicit dependency passing, daemon setup, mirai_map, Shiny integration ++ Install: npx skills add posit-dev/skills --skill mirai github.com/shikokuchuo/mirai/tree/main/dev/skills

mirai/dev/skills at main · r-lib/mirai

Minimalist Async Evaluation Framework for R. Contribute to r-lib/mirai development by creating an account on GitHub.

github.com

I’m happy to announce Rapp v0.3.0 — a package that makes it easy to build and share polished CLI applications written in R. Read more: www.tidyverse.org/blog/2026/02...

Rapp 0.3.0

Rapp is an R front-end (like Rscript) that turns simple scripts into polished CLIs, with automatic argument parsing, generated help, and support for commands and installable launchers.

tidyverse.org

Announcing yaml12: High-speed YAML 1.2 for #RStats & #Python 🐫 Built entirely in Rust, get up to 2x faster in R and 50x faster in Python vs. defaults, tag evaluation (like code execution) is opt-in, and strict YAML 1.2 compliance for consistent data. Learn more: tidyverse.org/blog/2026/01...

ragnar 0.3.0 is now on CRAN! 🚀 An R toolkit for RAG from your docs: faster ingestion, better retrieval, Azure OpenAI + Snowflake embeddings, and MCP serving. tidyverse.org/blog/2026/01... #rstats #rag #ai

ragnar 0.3.0

The new release of ragnar adds faster ingestion, new embedding providers, improved retrieval, and new integrations for using ragnar stores from tools.

tidyverse.org

Hallucinations are a key challenge when using large language models in production. Our latest blog post shows how Retrieval-Augmented Generation (RAG) helps, with a practical R example using open-source tools. Read more on the Jumping Rivers blog: www.jumpingrivers.com/blog/retriev...

Retrieval-Augmented Generation: Setting up a Knowledge Store in R

Learn about retrieval-augmented generation (RAG) workflows for large language models. This blog provides a hands-on introduction, including example code for creating a working knowledge store using op...

jumpingrivers.com

Announcing two new packages: `yaml12` for R and `py-yaml12` for Python. Fast, correct, and safe YAML 1.2 parsing and emitting, built in Rust. R: posit-dev.github.io/r-yaml12/ Python: posit-dev.github.io/py-yaml12/ #yaml #rstats #python

Fast YAML 1.2 Parser and Formatter

A fast, correct, safe, and ergonomic YAML 1.2 parser and generator written in Rust. Convert between YAML and simple R objects with full support for multi-document streams, tags, anchors, and aliases. ...

posit-dev.github.io

Turn YAML into R and R into YAML with the new {yaml12} #RStats 📦 posit-dev.github.io/r-yaml12/ind... By @t-kalinowski.bsky.social On the 📦 website: "YAML in 2 Minutes: A Gentle Introduction for R Users" posit-dev.github.io/r-yaml12/art...

Shiny for R v1.12 is here with built-in OpenTelemetry support! 🎉 Trace sessions and reactive calculations in production with zero code changes. Just install {otel}/{otelsdk} and set your env vars. Learn more: shiny.posit.co/blog/posts/s... #RStats #RShiny #OpenTelemetry

We're hiring an open-source #python developer focused on modeling APIs! tidyverse.org/blog/2025/11... #numpy #scipy #scikitlearn

Python Open-Source Developer

Posit is hiring a Python open-source developer to create more data analysis tools.

tidyverse.org

reticulate v1.44 is on CRAN! Positron integration is now enabled by default. Enjoy R and Python REPL consoles powered by concurrent threads in the same process, zero‑copy R↔Python data transfer, and full Variables Pane support. Full changelog: github.com/rstudio/reti... #rstats #python #pydata

Work-in-progress #RStats package {brandthis} that enables you to efficiently create themes and color scales from personal/company branding. Uses {ragnar}, {ellmer}, {ggsci} and other R packages.

For anyone who wants to try Codex Cloud for R package development, here is a setup script you can use: gist.github.com/t-kalinowski...

Setup codex-universal (Codex Cloud) for R package development

Setup codex-universal (Codex Cloud) for R package development - setup-codex-universal.sh

gist.github.com

The {ragnar} #RStats 📦 has a new function to inspect a data store: ragnar_store_atlas() , which visualizes the store, @t-kalinowski.bsky.social tells #Positconf2025

My Workshop for Ukraine is THIS THURSDAY, 11 Sept! Donate to help medics save lives in Ukraine *and* learn how to query text data with R and the {ragnar} #RStats 📦 Can't make it from noon to 2 ET? Register and you'll get access to recording and materials. Thank you! ❤️ www.machlis.com/workshop/

I'd love feedback on this #marginaleffects WIP. In GLMs with many parameters, the marginaleffects 📦 can get a 5–20x speedup (and better SEs) by calling JAX for automatic differentiation. Try the instructions at this link and let me know if you run into trouble. Thanks! github.com/vincentarelb...

`autodiff()` by vincentarelbundock · Pull Request #1580 · vincentarelbundock/marginaleffects

@arcruz0 I’ve been thinking about autodiff a lot recently and have become convinced that a tight integration with marginaleffects is highly desirable. The gains are substantial and the implementati...

github.com

Robert (Bob) Kubinec@rmkubinec.bsky.social · 11mo ago

So apparently the Canadian mastermind of model prediction is marrying his R package to a state of the art differentation engine, JAX.😎 Ie super fast marginal effect calculation from #rstats models Give it a look ⬇️

❗️Our next workshop will be on September 11th, 6 pm CEST, on RAG in R with ragnar by @smachlis.bsky.social Register or sponsor a student by donating to support Ukraine! Details: bit.ly/3wBeY4S Please share! #AcademicSky #EconSky #RStats

Finally got Glimpse out focused on what the Posit open source team has been up to. Turns out its quite a bit! posit.co/blog/posit-g... I continue to be happy with the approach we (Posit) are taking with LLMs and AI. Too impactful to ignore but focus on useful and safe as much as possible.

Posit

Posit's latest glimpse newsletter highlights new product releases, including the Positron IDE and several new LLM-powered tools.

posit.co

New release of quickr v0.2.0 on CRAN #rstats! New: runif(), more control flow, more ops, many many bug fixes. Also, I've been experimenting with chatgpts codex (cloud) in quickr. It's pretty useful! I added some setup scripts to make it easier to get started. changelog: github.com/t-kalinowski...