keyfunc age derives an age identity at the generic path the way secret's agehd does, prints the recipient or the identity, and encrypts to or decrypts with it, the derived recipient always among encrypt's recipients. Two review rounds; the second passed with no findings, the clamping step now pinned by a fixed identity test.
Model: opus-5 (implementation and review); fable-5-1 (landing)
keyfunc mnemonic derives a 12, 18 or 24 word child mnemonic through BIP-85's own mnemonic application, with the specification's test vectors as tests. One review round, passed with no findings; the reviewer reproduced the vectors from an implementation written from the specification alone.
Model: opus-5 (implementation and review); fable-5-1 (landing)
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)
The README is the specification sneak approved on 2026-09-07, moved
here from the hacks repository: deterministic SSH keys, age identities
with encrypt and decrypt, and child mnemonics, all derived from one
BIP-39 mnemonic and stored nowhere.
Model: fable-5-1
