4-stream manual-pane kickoff (no tmux automation): A foundation, B Card/Key/Totp, C Document+attachments, D server hook. Each dev prompt mandates a relay polling cadence (read inbox between every subagent; HOLD/RESCOPE = interrupt) so PM directives are never missed. Gitea/git merge mechanism; C<->D attachment-path coordination baked in. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01L5JvzEse4xUxLZKhofyeCD