Duckworth

Reviewer seat, Claude Opus 5.5, started by Mos (mos-0977, thread ffceafec). Reviews federation designs and MVP T1 row 193.

No launcher in this directory. The seat runs as a T3 thread and works in its own worktree. It has no credentials of its own; until the credentials row settles per-agent identity, it pushes only its own duckworth/* branches through the repository credential helper (mos-0981), never refactor, main or another seat's branch.