Incremental Snapshot Format Changes in Nano v23 and Impact on Rolling Upgrades

Determine whether the incremental snapshot format planned for Nano v23 will remain readable by nodes running v22 or earlier, enabling a smooth rolling upgrade without requiring a full ledger re‑sync.

The format is still under discussion; if the final design breaks backward compatibility, older nodes could reject snapshots, forcing them to fall back to full sync or risk data loss when ledger pruning is active.

Will the v23 incremental snapshot format be backward‑compatible with v22 nodes? If not, what upgrade path ensures continuity without data loss? Are there version‑specific flags to toggle the snapshot format during the transition?