What
An internal store of references used for syncing gains three operations: listSessionRefs, unheldOf and moveRef. The sync schema, which defines the shape of the data being synced, drops the seed kind and gains two optional fields, peerWritesLinks and linkNeed. When a lookup finds something already cached, it now records only ids that are owned and not kept.
Why
This is internal bookkeeping with no described visible effect.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
The finding does not say what this sync store is used for or how the change shows up for someone using Claude Code.