Design LangGraph UGC Workflow with Moderation

Design a LangGraph-based workflow for generating and moderating short-form multimodal UGC. Define the key nodes (e.g., 'IdeationAgent', 'MultimodalGenerator', 'ModerationAgent', 'HumanReview'), their states, and the transitions between them. Emphasize how feedback loops from moderation will guide iterative generation. Outline how Claude Opus 4.1 will be used for creative tasks and how Guidance will be integrated into the 'ModerationAgent' for policy enforcement. Provide a detailed graph diagram and textual explanation.