Status: Reserved companion document.
This companion document is reserved for conceptual rusty-kaspa implementation notes around KIP-21, including incremental state maintenance, witness-oriented data retention, pruning/reorg handling, and sync import/export choices. It does not change the consensus rules in KIP-21.
Reserved scope:
- incremental SMT state maintenance
- data retained for witness construction
- pruning and reorg maintenance
- pruning-point SMT import/export
- IBD wire shape and validation flow