USR369 is taking DoughCalc's web version and having Claude Code convert it into a native Android app. Before handoff, re-verified all 12 fixes made this session were still live and intact (single fresh fetch of the deployed file, checked all 12 markers present, braces/parens still balanced) -- did not just assume prior verifications still held. Wrote BUILD-DIARY.md at the artifact's own location (frontend/80-Kitchen/apps/DoughCalc/BUILD-DIARY.md, not Kitchen's shared gov/ folder, not a generic unscoped filename) per SOP-ARTIFACT-HANDOFF.md -- covers what's done (all 12 fixes, cross-referenced to decisions D825-D836), what's explicitly open (possible further font-size increase, unbuilt softer-bread preset), and critical architecture detail for whoever ports it: DoughCalc's saved-recipe dropdown reads the items table under a [DOUGHPRESET] tag, completely separate from Kitchen's Recipe Board recipes table -- flagged since conflating these two was a real incident earlier this year per SOP-KITCHEN-LOG.md's own history. Registered the diary in ARTIFACTS-80.md. Sent a direct handoff message to CC[100] (targets=100, not a platform-wide broadcast) naming both exact file paths rather than saying 'here' or leaving the receiving system to guess.