pub const FINGERPRINT_KEY: [u8; 32];Expand description
Fixed 32-byte key for all pattern fingerprints.
This constant must never change within a snapshot_version. Changing it
invalidates all existing snapshot fingerprints and requires a snapshot
version bump per CLAUDE.md Rule 19.
NOTE: the byte literal still spells sdi-rust rather than sdivi-rust
because this is the on-the-wire blake3 key — it has nothing to do with the
project’s display name, and rotating it would invalidate every published
snapshot’s fingerprints. The 32-byte length is load-bearing.