Adapt Princess_Pi's Encrypt-Share-Attribution scheme so shared files are
anonymous but provably attributable.
A. In-session: a persistent Ed25519 persona key (~/.config/hack-house/
persona_ed25519) signs every /send and /sendroom offer over the content
hash; receivers verify it and see the persona fingerprint. Optional
--attest <passphrase> attaches a revealable SHA-512(pass||sha256)
commitment. Additive JSON — wire-compatible with the Python client.
B. Portable: /export-signed <dir> packages a directory into Princess_Pi's
exact ESA 7z (fresh per-round Ed25519 sig over an inner 7z, SHA-512
checksums, bundled verify scripts). Builder embedded from
hh/tools/esa/esa_build.sh; verifiable with just bash+7z+ssh-keygen.
Tests: 45 pass (3 new persona). ESA archive build + verify-everything.sh +
passphrase reveal verified end-to-end.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude (hack-house)