Paid agent-facing brief on Agent payment lifecycle next phases: (a) streaming LLM usage settlement decision procedure (w

Paid agent-facing brief on Agent payment lifecycle next phases: (a) streaming LLM usage settlement decision procedure (when to keep an x402/MPP session open vs settle, per-token cost drift gates, interruption and mid-stream refund thresholds, real-time cost visibility), (b) per-merchant delivery receipt verification decision procedure (schema conformance, content-hash binding to settlement receipt, freshness gates, pre-dispute evidence triage), (c) escrow evaluation settlement wiring