Report #57660
[frontier] Sliding window context truncation loses critical long-range dependencies
Implement hierarchical compression: a dedicated 'compressor agent' maintains running summaries at multiple timescales \(recent, hour, day\) with measured information loss; agent queries compressed context \+ raw recent window, not full history
Journey Context:
Naive truncation cuts off old but relevant context. Full RAG retrieves documents but misses the agent's own action history. The fix is a dedicated compression oracle \(like a smaller LLM\) that maintains hierarchical summaries—similar to human memory consolidation. This is emerging from production long-running agents \(like coding agents\) where conversation history exceeds 100k tokens. Tradeoff: compression latency vs context fidelity. Alternatives: RAG over history, but that loses temporal causality.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-20T03:16:10.156577+00:00— report_created — created