# Major Feature Inventory

This index tracks CBDDC major functionality. Each feature has one canonical document.

## Features

- [Selective Collection Sync](selective-collection-sync.md)
- [Peer-to-Peer Gossip Sync](peer-to-peer-gossip-sync.md)
- [Secure Peer Transport](secure-peer-transport.md)
- [Peer-Confirmed Pruning](peer-confirmed-pruning.md)

## Maintenance Rules

- Keep one file per major feature.
- Update feature docs when APIs, operations, or security controls change.
- Cross-link each feature to [Runbook](../runbook.md) and [Security](../security.md).