Hierarchy, topic folders, heat
recent turns → topic folders → persona
FIFO moves a page down
match score picks its folder
heat promotes hot folders, evicts cold ones
four modules in one per-turn loop
Where the gains come from
LoCoMo avg F1 +49.11% over baselines
temporal, the hardest type: +118.8% F1
ablation: MTM > LPM > chain
the win is organization, not a bigger prompt
Cost and limits
4.9 LLM calls · 3.9K tokens per reply
A-Mem* 13 calls · MemGPT 17K tokens
hand-set sizes: STM 7 · 2000 folders · τ = 5
overlapping folders never merged
GVD is LLM-judged · A-Mem re-run lower