Module session 

AppServerSession actor — bridges SQ→Agent→EQ (ADR-005 L2 seam).

The session actor owns an Agent and runs a message loop:

• Receives SessionOp on the bounded SQ (cap=512)
• Drives agent turns via Agent::run_streaming
• Emits SessionEvent on the unbounded EQ

Structs

AppServerSession

Session actor that owns an Agent and processes commands from the SQ.