every agent memory library uses the same words: episodic, semantic, sometimes procedural. they’re cognitive science’s vocabulary, lifted into the API. the engineering often isn’t lifted with them. a library can have a procedural field that uses the same storage and retrieval as semantic — a label, not a separate system. the deeper slip is the word memory itself: most of what these libraries build is narrower than that, and the narrower term sharpens the problem.

the terminology comes from a 1972 chapter by Endel Tulving.¹ he argued that what people had been treating as one thing — memory — was at least two: memory for events (what happened, where, when), and memory for facts (the capital of France, water’s boiling point). he called them episodic and semantic. — Read More