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gemini-nanobanana

Use this skill when users ask to generate, edit, or compose images with Nano Banana (Gemini image models), including text-to-image, image editing, multi-image composition, grounding, and output sizing/saving controls.

templates/copilot-gemini-api/.agents/skills/gemini-nanobanana/SKILL.md

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Nov 5, 2026

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254
Repository last updated
Sep 4, 2026
License
MIT

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## Do this first
- Use a Node.js wrapper (`@google/genai`) as the primary flow (multi-turn edits, grounding, advanced `generationConfig`).
- Use `scripts/gemini-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.