Agent memory that can tell a bad rule from a badly applied rule, and fix the first while keeping the second
AspireAI community · arXiv
Memory lets LLM multi-agent teams reuse experience, but stored advice can be wrong or applied in the wrong situation, and team-level success or failure alone cannot tell those cases apart. DiscernMem splits the problem: Defect-Aware Memory Refinement compares a team run with a single memory and with no memory, diagnoses defects in the rules, and tests repairs on current and earlier tasks so previously useful behaviour is not lost; Boundary-Learning Meta-Memory records each memory's past uses and effects, learning when its owning role should apply or avoid it based on task context and incoming messages. With Qwen3-4B-Instruct-2507 across four benchmarks it posts the highest average score on AutoGen, CAMEL and MacNet, exceeding the strongest reported baselines by 0.51 to 4.32 points, including a PDDL score of 37.71 against 28.48 on CAMEL.
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Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.