Decrypted SYS4AB: 0x2c header (S4AB magic + 0x10E000 size + 8-byte key) then
XOR-0xFF payload == AGE.EXE byte-for-byte. Not a patched/unpacked VM. Real
handler code exists only unpacked in the runtime heap (0x62411000). Corrects the
'likely the patched VM' assumption.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reverse-engineering + open reimplementation workspace for Eushully's AGE/SYS4
engine (first target: Himegari). The repo root is age-reimpl/; the original game
install and the extracted ALF data are siblings outside the repo and are never
tracked. build/ (derived corpora) is gitignored and regenerated by the tools.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
