graph TD A[Niche/Topic Input] --> B{Niche Research Agent} B --> C[Niche Research Dataset] C --> D{Slogan Generation Agent} D --> E[Funny Slogan List] C --> F{Image Generation Agent} F --> G[AI-generated Card Images] E --> H{Composition Agent} G --> H H --> I[Final Birthday Card Designs] I --> J[Output: High-resolution JPEG images]