Epic put the UE6 source public on GitHub last month at State of Unreal, about a year and a half before Early Access at the end of 2027. That’s a lot of progress sitting in public commit history that’s easy to miss if you’re not reading diffs every day.
I started pulling the weekly commit activity by engine module the week it went public, and it turned into a small tool: mainradar
It scans Epic’s public commit activity every Monday and provides three views:
- Discover (all ~1,047 active modules ranked by recent churn)
- Delta (how far each branch has moved)
- Spotlight (the 8 biggest movers of the week with a plain-language note on what changed).
Current state as of the latest scan: Scene Graph, the Verse-based one, is churning hardest, close to 1,000 files changed. EditorInteractiveToolsFramework is being decoupled from UnrealEd, a real architectural shift. PCG, Sequencer and Niagara are also seeing steady movement.
The original post I made about UE6 going public got a retweet from Tim Sweeney, which is a big part of why I kept building this out.
It’s free, no account needed: https://mainradar.munduscreatus.be
Would genuinely like feedback, especially on what other views or module groupings would be useful.
