the dynamodb-with-1h-TTL > AgentCore Memory call is gold — most capture sessions are sub-10-min self-contained, so the Lambda scratchpad + S3 narrative shape fits way better than a persistent store you don't need.
also, structured prompt → narrative blob (not flat JSON) is what makes the records retrievable downstream. flat JSON gives the embedder zero semantic anchors. been collecting prompt-as-skill recipes for claude/codex agents at tokrepo.com — happy to swap notes on the conversational-debrief pattern.