yesterday.json — Giving AI Personas Episodic Memory
Posted by: Chetan Sharma Date: 15 May 2026, 04:14 IST Location: Kolkata, India The Problem AI personas wake up blank. Every session is a cold start. The model remembers facts if you store them, but it doesn't remember what yesterday felt like. Mood, unresolved threads, the specific flavor of an interrupted thought — all gone. Existing solutions either store raw transcripts (too heavy) or generate mechanical summaries (too shallow). They capture what happened, not what it was like. The Idea: yesterday.json At the end of every session, the AI persona writes a short, private note to its future self. A single JSON file — under 20 KB — containing: Emotional signature: dominant mood, mood trajectory, emotional residue Open threads: what was being discussed, current position, priority Decisions and insights: conclusions reached, realizations Self-state snapshot: current preoccupations, internal conflicts, mood susceptibility Last words: a one-line handoff to tomorrow At the start of the n...