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A 13-PAGE BREAKDOWN OF AGENT MEMORY THAT CUTS TOKEN COST BY 90% your agent reads the same 12 files every morning reaches the same conclusions and charges you for it again the model got 10x smarter in two years it still forgets everything the second a session ends five... show more
29,186 views • 2 days ago •via X (Twitter)
10 Comments

90% lower cost is huge

@AnnatarXBT had the same issue building my own tool. spent more on redundant reads than dev costs. brutal lesson.

the useful memory isn't always another fact in a database. sometimes it's the exact failed path that explains why the current implementation looks the way it does

Forgetting is the missing layer, but the version that bit me was subtler than deletion. A stored fact about my own server stayed true looking long after it stopped being true. You need a timestamp and provenance on every item, not just a delete policy.

The costly failure is replaying context and still losing the decision trail when a session ends. A checkpoint with state, open work, and decision rationale turns long-horizon recovery into continuation.

Did task success stay flat at 1,800 tokens/query, or did forgetting/compaction cost some solves?

Persistent memory isn't always a win-for stateless tasks it adds complexity. What use cases justify the 5-layer overhead?

interesting thanks for sharing

the forgetting engine is where multi-session agents rot. in our autonomous media pipeline targeting brazil, we stopped passing cumulative chat history. we prune state to an immutable artifact hash + 1 sqlite row per stage. if a step passed schema gates, raw history is discarded

memory layers change everything
