> For the complete documentation index, see [llms.txt](https://intro.arkreen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://intro.arkreen.com/progression.md).

# Progression

- [What changed over time](https://intro.arkreen.com/progression/what-changed-over-time.md)
- [Full Detail Documents](https://intro.arkreen.com/progression/full-detail-documents.md)