Slice: eager memory admission on UI save with join-only wake #353

Parent

#350

What to build

As a Human saving Memory through the UI, I want the change recorded durably at save time and carried by the next turn without an extra waiting turn, so that a crash loses nothing. As a Human saving ten times in a row, I want one coalesced notice, not ten rows. As a Human whose bot is idle, I want saves to never wake the bot alone.

Acceptance criteria

• A UI save admits a memory-change notice immediately (durable across Host restart).
• The notice rides the next turn of any trigger with no extra waiting turn.
• No save ever wakes an idle bot by itself.
• Rapid saves coalesce into one bounded notice.
• Live verification on an isolated Host with a real model.

Blocked by

• Slice: deliver external Memory changes through Inbox #352 (needs its Memory section render and admission reason).