Most AI agents lack memory—what's missing is a write path, not a bigger context window

minchoi · x · 2026-09-10

The author argues most AI agents just do "retrieval + prompt inflation" rather than real memory. RAG only looks up information; a memory system decides what's worth keeping (policies, preferences, facts, episodes, traces) and rebuilds the prompt from it each turn instead of stuffing more in. The missing piece isn't a bigger context window but a write path. A free course on building one is linked in the comments.

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