PHLEGM v4 Release - 2026-0926-1740-5324
Compiled-CFG Runtime + Clean v4 Documentation Boundary

1. PHLEGM v4 is a clean break from v3. The master version is v4.
2. v3 state/session formats are unsupported; current magic values are PHLEGM-STATE-V4 and PHLEGM-SESSION-V4 with format 4.
3. cfg/chipset is the only CPU-definition root. cfg/cpu compatibility resolution is removed and remote cfg/cpu payloads are rejected.
4. .phlegm CPU microcode, memory-map scripts, and support-device scripts compile at definition load into numeric runtime programs.
5. Opcode addressing+semantic programs are optimized/fused; common generic sequences may become superinstructions.
6. One-byte opcode sets use direct decode tables; prefixed/wildcard sets use compiled tries.
7. Normal builds use a quick runtime smoke test. -FullSelfTest requests the exhaustive executable CFG matrix.
8. NES NROM cartridge insertion persists through POWER OFF/ON/RESET and v4 state/session save/restore. EJECT is the explicit removal operation.
9. NES audio is one mono machine output while individual APU channel state remains modeled separately.
10. Active documentation was rewritten for v4; legacy v1/v2/v3 documentation/history is not carried in the v4 source payload.
