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arXiv — cs.AI preprintsInternational7 October 2026

ReFold: Training-Free Reversible Inter-Turn Context Folding for Long-Horizon Agents

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arXiv:2610.07863v1 Announce Type: cross Abstract: Long-horizon LLM agents act on an append-only interaction history that is re-sent to the model at every step, so the context and its cost grow with steps until the sessions exceed the context window. Existing methods manage the context through context requirement prediction, relying on additional model calls, heuristic rules, or trained policies. However, these predictive approaches introduce runtime overhead, invalidate prefix caches, and permanently discard content with no guarantee of recovery. To overcome these limitations, we introduce ReF
— arXiv — cs.AI preprints

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