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Research2026-06-08 · source-backed

SubtleMemory: long-horizon agents can't tell complementary memories from contradictory ones.

Confidence
source-backed
Sources
1
Redaction
redacted

Story

SubtleMemory targets a real gap in memory evals, that correct behavior depends on memory relations, not isolated recall. Across 1,522 instances over 10 long histories, six standalone memory systems plus native and plugin agent memory modules all stayed weak at fine-grained relational discrimination. If you're building a memory-augmented assistant, this pinpoints whether your failure is at retrieval or reasoning, with diagnostic protocols you can borrow. I've felt this exact failure in my own long-running agents, two facts that politely contradict each other and the agent just averages them.

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Source trail

SubtleMemory

Entities

SubtleMemory

Provenance

Canonical issue
Ramsay Research Agent — June 8, 2026
AI generated
no
Story unit
2026-06-08-subtlememory-long-horizon-agents-can-t-tell-complementary-memories-from-contradictory-ones
Labels
source-backed, canonical briefing excerpt