Initial commit

skills/image-gen/scripts/generate.py

@@ -0,0 +1,135 @@
+#!/usr/bin/env python3
+# /// script
+# dependencies = ["google-genai", "pillow", "python-dotenv"]
+# ///
+"""
+Generate images using Google's Nano Banana Pro (Gemini 3 Pro Image).
+
+Usage:
+    uv run generate.py "prompt" output.png [aspect_ratio] [size]
+
+Arguments:
+    prompt       - Text description of the image to generate
+    output       - Output file path (PNG)
+    aspect_ratio - Optional: 1:1, 2:3, 3:2, 4:3, 16:9, 21:9 (default: 1:1)
+    size         - Optional: 1K, 2K, 4K (default: 2K)
+
+Examples:
+    uv run generate.py "A cozy coffee shop" coffee.png
+    uv run generate.py "Infographic about AI" ai.png 16:9 2K
+"""
+
+import sys
+import os
+import json
+from pathlib import Path
+
+from dotenv import load_dotenv
+from google import genai
+from google.genai.types import GenerateContentConfig
+
+# Load API key from Geoffrey secrets
+SECRETS_PATH = Path.home() / "Library/Mobile Documents/com~apple~CloudDocs/Geoffrey/secrets/.env"
+if SECRETS_PATH.exists():
+    load_dotenv(SECRETS_PATH)
+
+
+def main():
+    if len(sys.argv) < 3:
+        print("Usage: uv run generate.py \"prompt\" output.png [aspect_ratio] [size]")
+        print("\nAspect ratios: 1:1, 2:3, 3:2, 4:3, 16:9, 21:9")
+        print("Sizes: 1K, 2K, 4K")
+        sys.exit(1)
+
+    prompt = sys.argv[1]
+    output_path = sys.argv[2]
+    aspect_ratio = sys.argv[3] if len(sys.argv) > 3 else "1:1"
+    image_size = sys.argv[4] if len(sys.argv) > 4 else "2K"
+
+    # Validate aspect ratio
+    valid_ratios = ["1:1", "2:3", "3:2", "4:3", "16:9", "21:9"]
+    if aspect_ratio not in valid_ratios:
+        print(f"Invalid aspect ratio: {aspect_ratio}")
+        print(f"Valid options: {', '.join(valid_ratios)}")
+        sys.exit(1)
+
+    # Validate size
+    valid_sizes = ["1K", "2K", "4K"]
+    if image_size not in valid_sizes:
+        print(f"Invalid size: {image_size}")
+        print(f"Valid options: {', '.join(valid_sizes)}")
+        sys.exit(1)
+
+    # Initialize client (uses GEMINI_API_KEY env var)
+    api_key = os.environ.get("GEMINI_API_KEY")
+    if not api_key:
+        print("Error: GEMINI_API_KEY environment variable not set")
+        sys.exit(1)
+
+    client = genai.Client(api_key=api_key)
+
+    # Configure generation
+    config = GenerateContentConfig(
+        response_modalities=["TEXT", "IMAGE"],
+        image_config={
+            "aspect_ratio": aspect_ratio,
+            "image_size": image_size
+        }
+    )
+
+    print(f"Generating image...")
+    print(f"  Prompt: {prompt[:100]}{'...' if len(prompt) > 100 else ''}")
+    print(f"  Aspect ratio: {aspect_ratio}")
+    print(f"  Size: {image_size}")
+
+    try:
+        response = client.models.generate_content(
+            model="gemini-3-pro-image-preview",
+            contents=[prompt],
+            config=config
+        )
+
+        # Extract and save image
+        saved = False
+        text_response = ""
+
+        for part in response.candidates[0].content.parts:
+            if hasattr(part, 'inline_data') and part.inline_data:
+                # Save image
+                image = part.as_image()
+
+                # Ensure output directory exists
+                output_file = Path(output_path)
+                output_file.parent.mkdir(parents=True, exist_ok=True)
+
+                image.save(output_path)
+                saved = True
+                print(f"\nImage saved: {output_path}")
+            elif hasattr(part, 'text') and part.text:
+                text_response = part.text
+
+        if text_response:
+            print(f"\nModel response: {text_response}")
+
+        if not saved:
+            print("\nError: No image was generated")
+            print("The model may have declined due to content policy.")
+            sys.exit(1)
+
+        # Output JSON for programmatic use
+        result = {
+            "success": True,
+            "output": output_path,
+            "aspect_ratio": aspect_ratio,
+            "size": image_size,
+            "text_response": text_response
+        }
+        print(f"\n{json.dumps(result)}")
+
+    except Exception as e:
+        print(f"\nError generating image: {e}")
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()