Just-in-Time Memory: agents keep raw trajectories and curate memory at read time, when the new task is known

arXiv / HuggingFace Daily Papers·low signalXBlueskyLinkedInCopy link

arXiv 2609.27334 (submitted 2026-09-23) argues that write-time memory curation, meaning reflections, skills or workflows distilled right after a task, throws information away before anyone knows which future query will need it. Instead it stores raw traces and trains a curator that builds a compact, task-specific payload from retrieved traces once the new task arrives. That turns a long-horizon credit-assignment problem into one trainable from immediate feedback. Anyone building agent memory can reuse the design choice: store trajectories, summarize on demand.