KDL is a small, pleasant document language with XML-like node semantics that looks like you're invoking a bunch of CLI commands! It's meant to be used both as a serialization format and a configuration language, much like JSON, YAML, or XML.

Previous discussions:

April 2024 (2 comments, 10 points): https://news.ycombinator.com/item?id=39958836

August 2023 (6 comments, 20 points): https://news.ycombinator.com/item?id=37249430

September 2021 (62 comments, 162 points): https://news.ycombinator.com/item?id=28510031