graph TD A[Start FrameGrabberAgent] --> B[Receive MP4 URL] A --> C[Receive Six-Step List] B & C --> D[Initialize Counter i = 1] D --> E{Is i <= 6?} E -->|Yes| F[Get Timestamp i from Step List] F --> G[Call Skill #202: Extract Frame] G --> H[Select Best Image from Results] H --> I[Store Image URL i] I --> J[Increment i] J --> E E -->|No| K[Call Skill #223: LLM Response] K --> L[Format URLs into Structure] L --> M[Output six-image-urls] M --> N[End FrameGrabberAgent]