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rich-iannone merged 2 commits into from
May 22, 2026
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Mention r-yaml12 R package in post 'In Defense of YAML' #276

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Mention r-yaml12 R package
rich-iannone May 21, 2026
6209469
Reflow the r-yaml12 mention; add to .qmd version
rich-iannone May 21, 2026
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6 changes: 6 additions & 0 deletions content/blog/in-defense-of-yaml/index.md
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Expand Up @@ -513,6 +513,12 @@ formats improve.
In the meantime, you can `pip install py-yaml12` and see what a modern,
spec-compliant YAML experience looks like in Python.

And if you work in R, the [`r-yaml12`](https://github.com/posit-dev/r-yaml12)
package brings the same benefits: full YAML 1.2 compliance, Rust-backed
performance, and safe defaults. Everything good about the Python package
is in the R version as well.


[^1]: Wikipedia, "[INI file](https://en.wikipedia.org/wiki/INI_file)".

[^2]: Douglas Crockford, "[The JSON
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4 changes: 2 additions & 2 deletions content/blog/in-defense-of-yaml/index.qmd
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Expand Up @@ -166,8 +166,6 @@ What has been missing from this landscape is a library that is fast, fully 1.2-c

The [`py-yaml12`](https://github.com/posit-dev/py-yaml12) library is a YAML 1.2 parser and formatter for Python, implemented in Rust for speed and correctness. It is built on the `saphyr` crate[^14] (a Rust YAML library) and exposes a minimal, focused API: `parse_yaml()` and `read_yaml()` for loading, `format_yaml()` and `write_yaml()` for serialization.

<!-- There is also a sibling [`yaml12`](https://github.com/posit-dev/r-yaml12) package for R, built on the same Rust core. -->

### Simple

The design philosophy is straightforward. For the vast majority of use cases, you work with plain Python builtins end to end: `dict`, `list`, `int`, `float`, `str`, and `None`. There is no special document class, no custom node types in the common path. Because YAML 1.2 is a superset of JSON, all valid JSON parses identically. The library achieves 100% compliance with the yaml-test-suite,[^15] the community-maintained corpus of edge cases and conformance tests.
Expand Down Expand Up @@ -282,6 +280,8 @@ This is, in the end, a familiar pattern in computing. Every generation of config

In the meantime, you can `pip install py-yaml12` and see what a modern, spec-compliant YAML experience looks like in Python.

And if you work in R, the [`r-yaml12`](https://github.com/posit-dev/r-yaml12) package brings the same benefits: full YAML 1.2 compliance, Rust-backed performance, and safe defaults. Everything good about the Python package is in the R version as well.

[^1]: Wikipedia, "[INI file](https://en.wikipedia.org/wiki/INI_file)".

[^2]: Douglas Crockford, "[The JSON Saga](https://www.youtube.com/watch?v=-C-JoyNuQJs)", presentation at Yahoo, 2011.
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