Three fenced worker Pods claim Hermes Kanban runs through a coordinator that
owns every state transition, with per-ordinal HMAC authority, a mediated
broker-only SCM path, and durable per-ordinal workspaces.
Content is the reviewed head of PR #18 (689bcb6e) with PR 16's and PR 19's
contributions removed: they were merged in only to validate co-existence and are
not prerequisites, so this branch no longer carries them as ancestors. Only PR 14
and PR 15 remain, because the broker boundary and the cli_lane_* decomposition
are load-bearing for two of the fixed P0 boundaries.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
