Iris, 2026-09-08: 'any major additions or design things should be added there, not just public API stuff. You may as well remove the public API bit at this point.' Widened the header, pointed AGENTS.md at the new scope, and added the design point behind the scroll bug -- a cached measurement needs its own value for 'not measured yet'. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>