TEPA Paper: Append-Only Memory is Wrong for AI Agents That Change Their Mind
ZestycloseTie1793 · reddit · 2026-08-10
The new preprint TEPA argues that append-only or last-write-wins memory mechanisms are flawed when new evidence conflicts with an AI agent's old memory. TEPA treats memory validity as a first-class state: old records are revoked from active use but kept for audit.
In the authors' complete-reversal experiment, TEPA scored 0.950, compared to just 0.210 for append-only and last-write-wins. For production translation, every durable memory gets status, validfrom, supersededby, and evidenceid. A conflict creates a revocation and a replacement with a reason, ensuring that “last write” does not automatically mean “current truth.”
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