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Keep Long Agent Sessions Working: Context Compaction and Summaries

AI & Agents advanced 8 min read $0.01 Updated 2026-10-19

Practical context management for long-running agents: what to keep verbatim, structured rolling summaries, offloading tool outputs to files, trimming by relevance, checkpoints, when to compact, and tests to confirm facts survive compaction.

Agents that run for hours fill the context window and start forgetting or repeating work. Compact history with structured summaries, keep pinned facts, offload large outputs and verify nothing critical was lost.

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