5 Aug 2026
Arbr is now Prumo — and the first post is late
This page promised its first entry the week of 20 July. That didn't happen, and the honest reason is the work you're reading now: we renamed the product. Arbr — a name that read as "arbor" and collided with half a namespace — is now Prumo, Portuguese for the plumb-line, the builder's tool for standing true. Same product, same covenant, same code; a name we can actually own.
What shipped with the rename: the app's identity moved (new bundle, new calendar name, the in-app disclosure re-worded to match), this site moved to prumo.life, and every promise on it was re-read against the code before it was re-published. The old arbr.is pages stay up until they're formally retired.
The trade-off we're owning: the rename cost the stream its first two weeks. We'd rather start late under the right name than on time under the wrong one. The weekly cadence starts here.