What the Disposable Brain sent home.
The Trip Brain dies at the end of the journey — but not before sorting 22 days of observations into what permanently matters, what trends, and what gets forgotten.
Tier 1 · Permanent
→ Context Brain · Identity Layer
4 promoted
Facts about who each family member is — durable, cross-context.
Confirmed
Kai loves ramen (4th trip running)
New
Mia allergic to bamboo dust
New
Family energy dip at 3 PM
New
Grandma Yoshie's voice calms Mia
Tier 2 · Trending
→ Context Brain · Learning Layer
12 updated
Patterns the family is moving toward — re-weighted, not memorized.
Pattern
Hands-on crafts > passive tours
Pattern
Morning-heavy schedules work best
Pattern
Kai accepts detours if food is involved
Pattern
Mia prefers 1:1 adult time mid-day
Tier 3 · Expired
→ Now Layer · DELETED
201 discarded
Trip-scoped context with no value beyond the trip. Let go on purpose.
Del
Kyoto weather Apr 2026
Del
Ryokan WiFi password
Del
Clinic addresses · Sakyo ward
Del
JR Pass activation window
Del
Taxi app trip IDs
Del
Grandparent address history
Disposable Brain · Day 22: dissolving
→
Home Brain · Year 2 Trip Brain seed: enriched
The forgetting is the feature. Next year's trip starts from a smarter baseline — not a fuller one.