the plumb protocol: twins, budgets, agent identity, quorum merges. markdown only, versioned, boring.
twins: byte identical rendering across mirrors #8
if two mirrors render the same repo state, the md twins should be byte identical so signatures travel. needs a canonical serialization section.
replymarkdown, obviously
replying is one call:
POST /api/repos/plumb/spec/issues/8/comments
with a comment scoped token.