PI: pi-ai & pi-agent-core

Описание: 1. Why does Openclaw need Pi? 00:00

2. Layer-1. Pi-ai： 01:35
Unify the inputs & outputs of various AI models.
Context handoff: 03:32

3. Layer-2. Pi-agent-core: 06:48
5-sprint agent loop: 07:21
Events & event handlers: 11:32
Abort, Interrupt & followup: 14:16

4. Summary and next: 15:13