Nanobanana: Nano Banana Image Generation

Generate and edit images using Google's Nano Banana (Gemini image generation API). This skill handles direct image generation, iterative editing, and expert guidance for integrating the API into codebases.

Core differentiator: A prompt enhancement system that analyzes user intent and project context to craft optimized prompts before calling the API.

This is the explicit Gemini/Nano Banana path (named directly by the user): for a generic "generate an image" request with no engine named, codex-imagegen is the default generator instead.

Phase 0: Environment Check

Before anything else, verify the environment is ready.

1. Check API key:

echo "${GEMINI_API_KEY:0:10}..."  # Show first 10 chars only (security)