[stickupkid]

Correct, see the github mirror[1]. I don't know how well supported that feature is compared to main branch. If it was completely stable, then it would have already landed in the main stable branch. Clarity about the roadmap of that branch would be nice.

Edit: maybe it's still being actively developed?

1. https://github.com/sqlite/sqlite/tree/begin-concurrent

[scottlamb]

It may not be just about stability (in the sense of being free of defects) but also about whether they've decided to commit to maintaining it forever and supporting it in combination with whatever other features they intend to add to the main branch.

[detourdog]

Is is the same cast of characters with a secondary branch?

[anacrolix]

uhh, yes, fwiw.