kbfold v0.2.0

License and crate

• Code under MIT OR Apache-2.0, paper under CC BY 4.0 (license files added).
• The Rust library is published on crates.io as kbfold: package metadata, license files in the crate, crate documentation with a tested example, cargo doc without warnings; CI builds the documentation, runs cargo publish --dry-run and builds with the minimum supported Rust version (1.85).

Rust

• rust/src/merkle.rs: leaves and internal nodes are hashed with BLAKE3 in keyed mode under two fixed keys (domain separation) instead of one-byte prefixes, so that an internal node is 64 bytes, one compression. Same change as in the Kronecker-FRI implementation, which keeps the comparison of the Kronecker-FRI paper at identical engineering. The data in rust/results/ were recorded with the earlier format.

Paper

• §7: the Merkle hashing format; the measurements of §8 predate it.