Header, global constraints, file structure, the interface block every task builds against, the group/ownership table, the SECTION 25 banner protocol and the merge notes. Task sections are drafted next. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd