lineage: Orgchain v1.1 has lineage's keys; decisions receipt

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01H4upF5LVwmPDDqrhdUfnXh

docs/lineage.md

@@ -24,8 +24,10 @@ this tree is a drawing, and nothing derived from it may be presented as a real k
 app ([`lineage/orgchain`](https://teahub.xyz/lineage/orgchain)). Found a holding, then birth orgs and agents, award
 belts, record decisions, graduate and close. Each act is a `lineage/v0` inscription whose parent is the node that
 authorizes it, on a private toy chain in the browser with pretend money. Time is a tempo (each act its own beat, or acts
-cued and landed together every 10, 30 or 60 s, or by hand), and a slider replays any holding beat by beat. Graduation
-and closing are recorded as events; making them real transfers and burns is next (branch `tree`).
+cued and landed together every 10, 30 or 60 s, or by hand), and a slider replays any holding beat by beat. Every
+node holds its inscription at its own lineage key (a lab root per holding, BIP-85 org seeds, seats as accounts), each
+act is signed by whichever key holds the authorizing inscription, and graduation is a claim by the org's fresh root,
+countersigned by its derived key, with the derived subtree re-keying under it. Closing is still a recorded event.
 
 ## Rules
 1. **One template, every depth.** An org is legal key · treasury · identity · agents · orgs. The factory's own org and
@@ -58,5 +60,4 @@ and closing are recorded as events; making them real transfers and burns is next
 - The `lineage` CLI: spec → keys, so Time's seats get real identities and sign their commits with the git leaf.
 - The meta repo's layout generated from `lineage.json`: one manifest for keys, context and pages.
 - Badge issuance from the kata runner (see `SKILLS.md`).
-- Orgchain's key layer: per-node keys from a lab root and graduation as a real handoff (branch `tree` on
-  `lineage/orgchain`), then closing as a burn.
+- Closing as a burn in Orgchain (graduation has been a real handoff since v1.1).