Changes to “The spine chain”
#75 (zoobc.how, 2026-10-26 20:39 UTC) → #112 (zoobc.how, 2026-10-26 20:44 UTC): Seed article updated
…
- **Finality.** No node reorganises the main chain below the last stored spine checkpoint (see [[finality-and-rollback]]).
- **Fast sync.** A new node syncs the spine first: its manifests say which snapshot to fetch, and its key changes say which node keys to trust (see [[snapshots-and-fast-sync]]).
− - **The archive.** Walking the spine leads to every past snapshot (see [[the-archive]]).
The spine is kept by every node, not by the Foundation, and nothing is traded on it.
> **Planned design.** When more than half the seats are gone for good, a release may carry a spine restart record (the last good spine block and a signer list). It is accepted only after the spine has been stuck for a week and the release has passed the registry's veto window.
+
+ > **Planned design.** The archive will let anyone walk the spine back to any past snapshot and rebuild the state of that time (see [[the-archive]]).
> **Planned design.** If several chains come to share one spine, a chain's checkpoint and snapshots will enter a shared spine block only with the signatures of two thirds of that chain's own nodes.
…