Three documents showed the remote layout with a plaintext snapshot ID as the metadata directory name, and docs/REPOSTRUCTURE.md blamed those IDs for the observable backup time. The store actually names each metadata directory with a one-way hash of the ID, so hostname and snapshot name are not visible; the backup time is, through the plaintext timestamp in the manifest, which is accepted behaviour.
README, ARCHITECTURE.md, docs/DATAMODEL.md and docs/REPOSTRUCTURE.md now show the hashed layout, the derivation is documented once, and the privacy section lists what the unencrypted manifest exposes. Two code comments that claimed the timestamp was hidden are corrected. No behaviour change.
Judgement call: docs/DATAMODEL.md was not named in the issue but had the same error.
model: claude-opus-4-8 (implementation, review); claude-fable-5-1 (merge)
- Manifests are now only compressed (not encrypted) so pruning operations can work without private keys
- Updated generateBlobManifest to use zstd compression directly
- Updated prune command to handle unencrypted manifests
- Updated snapshot list command to handle new manifest format
- Updated documentation to reflect manifest.json.zst (not .age)
- Removed unnecessary VAULTIK_PRIVATE_KEY check from prune command