Do this first

Use a Node.js wrapper (@google/genai) as the primary flow (multi-turn edits, grounding, advanced generationConfig).
Use scripts\nanobanana-cli.js for quick single-turn generation/editing runs.
Do not teach raw curl; keep guidance in JS CLI/wrapper form.

Enforce these defaults

API key source: NANOBANANA_GEMINI_API_KEY with fallback GEMINI_API_KEY.
Default model: gemini-3.1-flash-image-preview (allow env override via NANOBANANA_MODEL).
Reference images: support up to 14 total.
Thinking strength: configurable (minimal|low|medium|high), default High.
Aspect ratio: default Auto.
Resolution: default 1K.
Output mode: default Images only.
Google Search grounding tool: default Disabled; enable with --google-search when needed.
Output directory: default nanobanana-output/, unless the prompt explicitly asks for another location.
512px rule: send imageConfig.imageSize as string "512" in API calls (never numeric 512).