Dev-A shared item_build foundation + personal --*-stdin; Dev-B org Card/Key/Totp; Dev-C org Document + attachment storage; Dev-D server hook grant-scoping. TDD tasks with full code; A gates B/C, D independent. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01L5JvzEse4xUxLZKhofyeCD