- doc/heart.md: emotional system design (motivation, reflection, relationship memory)
- Auto-reflection: every 10 messages, async LLM call updates inner_state
with feelings and understanding changes (not conversation summary)
- Life Loop emotional motivation: "you care, not because timer fired"
- Remove all instance-specific names from code/docs — persona, name,
memories are instance data (SQLite), not code
- Rewrite doc/life.md and doc/todo.md for instance isolation principle
