If you keep safety rules or coding standards in an AGENTS.md or a CLAUDE.md, this one is worth your time.

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Researchers measured what context compaction actually destroys across 20 production agent configurations.

A safety rule and an episodic log compete for the same tokens, and when the budget overflows both get summarized at the same rate. Only the rule needs exact wording to stay enforceable.

Claude Code compact on Sonnet 4.6 preserves 53% of safety rules after one round. After five rounds, it goes to 10%.

Their fix is Knowledge Triage, which classifies each line of the knowledge base by type and routes each type through its own retention policy. Three deterministic operators handle compaction, partitioning, and retrieval, preserving 2 to 4x more safety rules at every ratio with 96% recall over five rounds.

Paper: https://t.co/iVYbNrTRJX

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