Iris PR #19's tip is 2807a92. LAYOUT.md's settled-design section named the retired `PlaceDescAxis::within`/`shifted`/`sized` constructors and the `axis`/`axis_mut` accessors; it now says the `_desc` chaining rule, the `axis` lift, and that every pair is a struct of two per-axis values read with `[axis]`. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>