Open source yaml projects
Every project in the registry tagged yaml, ranked by real GitHub adoption.
The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.
First class CMS experience, TypeScript API, Markdown & YAML/JSON based, no DB
AI-native software testing platform — one YAML test language covering API, Web, mobile, messaging, data, and LLM scenarios. Self-hostable.
Frequently asked questions
How many open source yaml projects are there?
This registry tracks 3 projects tagged yaml, with 27,736 GitHub stars between them. The most-adopted is Archon at 23,496 stars.
Are these yaml projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which yaml project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these yaml projects still maintained?
3 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.