Hierarchical RAG plus persistent scratchpad beats FIFO windows for long-horizon agents
IgorCarron · x · 2026-09-05
A developer describes shifting an agent system (Astra) from a linear FIFO context window to hierarchical RAG with a persistent scratchpad. Traditional compression loses key edge invariants during deep iterations; persistent note indexing lets the agent accurately resolve decision diffs across long traces. The repost quips that "RAG is everything," underscoring RAG's comeback in agent memory design.
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