Agent skill

Nano Banana Build

Generate and edit high-quality images using Gemini 2.5 Flash Image and Gemini 3 Pro Image (Nano Banana).

Install Nano Banana Build

skills CLI

$ npx skills add cnemri/google-genai-skills --skill nano-banana-build -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install cnemri/google-genai-skills nano-banana-build --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/cnemri/google-genai-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/nano-banana-build .claude/skills/nano-banana-build && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "nano-banana-build" agent skill from https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build into .claude/skills/nano-banana-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana-build", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add cnemri/google-genai-skills --skill nano-banana-build -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install cnemri/google-genai-skills nano-banana-build --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cnemri/google-genai-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/nano-banana-build .agents/skills/nano-banana-build && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "nano-banana-build" agent skill from https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build into .agents/skills/nano-banana-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana-build", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add cnemri/google-genai-skills --skill nano-banana-build -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install cnemri/google-genai-skills nano-banana-build --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cnemri/google-genai-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/nano-banana-build .cursor/skills/nano-banana-build && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "nano-banana-build" agent skill from https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build into .cursor/skills/nano-banana-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana-build", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/cnemri/google-genai-skills.git --path skills/nano-banana-build

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add cnemri/google-genai-skills --skill nano-banana-build -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install cnemri/google-genai-skills nano-banana-build --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cnemri/google-genai-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/nano-banana-build .gemini/skills/nano-banana-build && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "nano-banana-build" agent skill from https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build into .gemini/skills/nano-banana-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana-build", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install cnemri/google-genai-skills nano-banana-build

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add cnemri/google-genai-skills --skill nano-banana-build -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/cnemri/google-genai-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/nano-banana-build .github/skills/nano-banana-build && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "nano-banana-build" agent skill from https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build into .github/skills/nano-banana-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana-build", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add cnemri/google-genai-skills --skill nano-banana-build -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install cnemri/google-genai-skills nano-banana-build --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cnemri/google-genai-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/nano-banana-build .opencode/skills/nano-banana-build && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "nano-banana-build" agent skill from https://github.com/cnemri/google-genai-skills/tree/main/skills/nano-banana-build into .opencode/skills/nano-banana-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana-build", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: nano-banana-build
GitHub stars: 127
Token cost: ~534 tokens
SKILL.md length: 121 words
Files: 7 (incl. references)
Skills in repo: 10
Repo updated: Feb 6, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Generate and edit high-quality images using Gemini 2.5 Flash Image and Gemini 3 Pro Image (Nano Banana).

Works in 2 steps: Fast Generation → High-Quality Editing
Tasks that involve Image generation
SKILL.md covers Quick Start Setup, Reference Materials, Available Models and Common Workflows
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Nano Banana Build is an agent skill from cnemri/google-genai-skills. Generate and edit high-quality images using Gemini 2.5 Flash Image and Gemini 3 Pro Image (Nano Banana). Supports Text-to-Image, Style Transfer, Virtual Try-On, and Character Consistency.

Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files (for example `references/image_editing.md`, `references/image_generation.md` and `references/model_capabilities.md`).

It sits in Media & Creative, covering Image generation. It works with Google Gemini. The licence is MIT.

When your agent uses it

Tasks that involve Image generation

Example prompts

“/nano-banana-build”

Requirements

Python 3

Workflow steps

2 steps, taken from the step headings in SKILL.md.

Fast Generation
High-Quality Editing

What it can do on your machine

Read from SKILL.md and the folder at commit 7277476. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are python).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Nano Banana Build loads about 534 tokens when it runs, and up to ~3.8k if it reads all its reference files. Until then it costs about 51 tokens; SKILL.md has 121 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~51
When it runs · the whole SKILL.md, loaded when a task matches: ~534
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~3.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cnemri/google-genai-skills at commit 7277476, republished under its MIT licence (© cnemri). 121 words, ~534 tokens.

Download SKILL.mdSave it as .claude/skills/nano-banana-build/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.

name: nano-banana-build
description: Generate and edit high-quality images using Gemini 2.5 Flash Image and Gemini 3 Pro Image (Nano Banana). Supports Text-to-Image, Style Transfer, Virtual Try-On, and Character Consistency.

Nano Banana Image Generation Skill

Use this skill to generate and edit images using the google-genai Python SDK with Gemini's specialized image models (Nano Banana).

Quick Start Setup

python

from google import genai
from google.genai import types
from PIL import Image
import io

client = genai.Client()

Reference Materials

Model Capabilities: Comparison of Gemini 2.5 vs 3 Pro, resolutions, and token costs.
Image Generation: Text-to-Image, Interleaved Text/Image.
Image Editing: Subject Customization, Style Transfer, Multi-turn Editing.
Thinking Process: Understanding thoughts and signatures (Gemini 3 Pro).
Recipes: Extensive collection of examples (Logos, Stickers, Mockups, Comics, etc.).
Source Code: Deep inspection of SDK internals.

Available Models

gemini-2.5-flash-image (Nano Banana): Fast, high-quality generation and editing. Best for most use cases.
gemini-3-pro-image-preview (Nano Banana Pro): Highest fidelity, supports 2K and 4K resolution, complex prompt adherence, and grounding.

Common Workflows

1. Fast Generation

python

response = client.models.generate_content(
    model='gemini-2.5-flash-image',
    contents='A cute robot eating a banana',
    config=types.GenerateContentConfig(
        response_modalities=['IMAGE']
    )
)

2. High-Quality Editing

python

response = client.models.generate_content(
    model='gemini-3-pro-image-preview',
    contents=[
        types.Part.from_uri(file_uri='gs://.../shoe.jpg', mime_type='image/jpeg'),
        "Change the color of the shoe to neon green."
    ],
    config=types.GenerateContentConfig(response_modalities=['IMAGE'])
)

Files

SKILL.md and 6 other files (references) in skills/nano-banana-build of cnemri/google-genai-skills.

SKILL.md
references/image_editing.md
references/image_generation.md
references/model_capabilities.md
references/recipes.md
references/source_code.md
references/thinking_process.md

Open the folder on GitHubat commit 7277476

Compare with similar skills

Nano Banana Build next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Nano Banana Build compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Nano Banana Build this skillcnemri/google-genai-skills	127	—	~534	Automated safety check: Pass	MIT	8 mo ago
AI Image Generation and Editingzhayujie/CowAgent	47k	—	~1.3k	Automated safety check: Pass	MIT	yesterday
Logo Generatorop7418/logo-generator-skill	2.2k	—	~1.8k	Automated safety check: Notes	None	5 mo ago
Gemini Web Reverse-Engineered ClientJimLiu/baoyu-skills	27k	5 repos	~1.6k	Automated safety check: Pass	MIT	1 mo ago
SEO Image GeneratorAgriciDaniel/claude-seo	19k	2 repos	~2.1k	Automated safety check: Pass	MIT	6 days ago
BlockRun Image GenerationBlockRunAI/ClawRouter	6.6k	—	~2.1k	Automated safety check: Pass	MIT	6 days ago

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Questions about Nano Banana Build

What does Nano Banana Build do?

Generate and edit high-quality images using Gemini 2.5 Flash Image and Gemini 3 Pro Image (Nano Banana). Nano Banana Build is an agent skill from cnemri/google-genai-skills.5 Flash Image and Gemini 3 Pro Image (Nano Banana).

When should I use Nano Banana Build?

Nano Banana Build fits situations like: tasks that involve Image generation.

How do I install Nano Banana Build in Claude Code?

Run `npx skills add cnemri/google-genai-skills --skill nano-banana-build -a claude-code`. Or copy the skill folder (skills/nano-banana-build in cnemri/google-genai-skills) into .claude/skills/nano-banana-build in your project. Claude Code loads it when a task matches its description.

How do I install Nano Banana Build in Codex?

Run `npx skills add cnemri/google-genai-skills --skill nano-banana-build -a codex`. Or copy the skill folder (skills/nano-banana-build in cnemri/google-genai-skills) into .agents/skills/nano-banana-build in your project. Codex loads it when a task matches its description.

Can I use Nano Banana Build in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cnemri/google-genai-skills --skill nano-banana-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/nano-banana-build, .gemini/skills/nano-banana-build, .github/skills/nano-banana-build and .opencode/skills/nano-banana-build in your project.

What does Nano Banana Build need to run?

SKILL.md names no scripts, command-line tools or credentials: Nano Banana Build is instructions for the agent only. Our summary lists: Python 3.

Does Nano Banana Build access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Nano Banana Build safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Nano Banana Build use?

Nano Banana Build is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Nano Banana Build use?

About 534 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 3.3k tokens, read only when the agent opens those files.

What are the alternatives to Nano Banana Build?

Skills that share tags, products or a category with Nano Banana Build: AI Image Generation and Editing (zhayujie/CowAgent, 47k stars), Logo Generator (op7418/logo-generator-skill, 2.2k stars), Gemini Web Reverse-Engineered Client (JimLiu/baoyu-skills, 27k stars) and SEO Image Generator (AgriciDaniel/claude-seo, 19k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Nano Banana Build?

cnemri (a GitHub user) maintains it in cnemri/google-genai-skills, which has 127 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on February 6, 2026.

Source: cnemri/google-genai-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Nano Banana Build

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Nano Banana Image Generation Skill

Quick Start Setup

Reference Materials

Available Models

Common Workflows

1. Fast Generation

2. High-Quality Editing

Files

Compare with similar skills

Similar skills

More from cnemri/google-genai-skills

Related

Questions about Nano Banana Build