Fork of Gezine's MIT-licensed BD-JB5 (BD-J sandbox escape) extended into a
full userland -> kernel -> root -> homebrew chain with automation tooling:
ps5chain.py (full-chain orchestrator), ps5find.py (LAN discovery),
probe payload, and local test harness.
All original copyright headers and licenses preserved. Credits: Gezine,
TheFlow, ufm42, john-tornblom, hammer-83, kuba-.