Agents slow down as memory notes pile up, unlike humans who speed up with practice

sujingshen · x · 2026-09-16

Citing Manling Li's framing of continual learning as "an apprentice developing expertise on the job," the author spotlights a striking finding: human testers got faster with practice, while agents generally slowed down as their memory notes grew. Merely accumulating notes can burden agents with their own memory; multi-scale abstraction—compressing experience into reusable knowledge at the right level—is what matters.

The author proposes four tests for any Personal AI claim:

Takeaway: accumulation is not continual learning—a memory that slows you down isn't expertise yet.

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