5c21b28786
- Introduced `generateHandoffFromContext` to enable provider-aware oneshot generation and improved cache hit rates via the live-turn pipeline. - Updated `buildSideRequestContext` to support pinning custom system prompts, preventing per-turn hook leakage during handoff. - Added concurrency guards across CLI and RPC modes to block manual `/handoff` requests while a session is actively streaming. - Standardized handoff execution to force `toolChoice: "none"` and enforce consistent cache-routing behavior.