ResearchResearch paperReasoning & Planning · Agents & Tool Use · Large Language Models1 source · Oct 20, 2026

MemDev-Bench: Does Memory Help Code Agents?Benchmarking Memory Systems over Real Repository Histories

In this paper, we present MemDev-Bench to evaluate how memory systems affect code agents over diverse repository histories.

Key points

  • Code agents increasingly work on evolving real repositories, and memory systems aim to help them reuse earlier experience.
  • However, such experience is diverse and evolving, so it remains unclear how memory systems organize it and thereby affect code agents.
  • Based on MemDev-Bench, our systematic evaluation of memory systems across diverse development scenarios yields three main findings.
  • These results suggest that future memory systems should preserve process information and reassess memory applicability against current task context.

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