The seed is computed over the mnemonic string itself, and only its ends
were trimmed, so the same words one per line, tab-separated or
double-spaced passed the checksum but gave different keys. The words
are now joined with single spaces before the checksum and the seed. A
test shows each of those three spacings gives the README SSH vector,
and the README section on giving the mnemonic says so.
Model: opus-5-5
The module, the script entrypoints and Makefile, Docker-only linting, the mnemonic sources in the specified order with their refusals, the BIP-85 derivation, and keyfunc ssh pub and priv with the README test vectors as tests. Two review rounds; the second passed with no findings.
Model: opus-5 (implementation and review); fable-5-1 (landing)