Agent skill

Nano Banana

Generate or edit images via Nano Banana image models. An agent skill from nexu-io/nexu.

Install Nano Banana

skills CLI

$ npx skills add nexu-io/nexu --skill nano-banana -a claude-code

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

GitHub CLI

$ gh skill install nexu-io/nexu nano-banana --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/nexu-io/nexu.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/nexubot/nano-banana .claude/skills/nano-banana && 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" agent skill from https://github.com/nexu-io/nexu/tree/main/skills/nexubot/nano-banana into .claude/skills/nano-banana/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana", 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/nexu-io/nexu/tree/main/skills/nexubot/nano-banana

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 nexu-io/nexu --skill nano-banana -a codex

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

GitHub CLI

$ gh skill install nexu-io/nexu nano-banana --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/nexu.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/nexubot/nano-banana .agents/skills/nano-banana && 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" agent skill from https://github.com/nexu-io/nexu/tree/main/skills/nexubot/nano-banana into .agents/skills/nano-banana/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana", 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 nexu-io/nexu --skill nano-banana -a cursor

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

GitHub CLI

$ gh skill install nexu-io/nexu nano-banana --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/nexu.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/nexubot/nano-banana .cursor/skills/nano-banana && 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" agent skill from https://github.com/nexu-io/nexu/tree/main/skills/nexubot/nano-banana into .cursor/skills/nano-banana/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana", 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/nexu-io/nexu.git --path skills/nexubot/nano-banana

--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 nexu-io/nexu --skill nano-banana -a gemini-cli

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

GitHub CLI

$ gh skill install nexu-io/nexu nano-banana --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/nexu-io/nexu.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/nexubot/nano-banana .gemini/skills/nano-banana && 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" agent skill from https://github.com/nexu-io/nexu/tree/main/skills/nexubot/nano-banana into .gemini/skills/nano-banana/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana", 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 nexu-io/nexu nano-banana

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 nexu-io/nexu --skill nano-banana -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/nexu.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/nexubot/nano-banana .github/skills/nano-banana && 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" agent skill from https://github.com/nexu-io/nexu/tree/main/skills/nexubot/nano-banana into .github/skills/nano-banana/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana", 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 nexu-io/nexu --skill nano-banana -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 nexu-io/nexu nano-banana --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/nexu.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/nexubot/nano-banana .opencode/skills/nano-banana && 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" agent skill from https://github.com/nexu-io/nexu/tree/main/skills/nexubot/nano-banana into .opencode/skills/nano-banana/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nano-banana", 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
GitHub stars: 3.3k
Token cost: ~757 tokens
SKILL.md length: 268 words
Files: 3 (incl. scripts)
Skills in repo: 10
Repo updated: Apr 26, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Generate or edit images via Nano Banana image models. An agent skill from nexu-io/nexu.

Image generation
SKILL.md covers Models, Generate an image, Edit a single image and Multi-image composition (up to…, plus 5 more sections
Runs JavaScript scripts from its folder; calls node
Nano banana pro

What it does

Nano Banana is an agent skill from nexu-io/nexu. Generate or edit images via Nano Banana image models. Triggers on "generate image", "image generation", "nano banana", "edit image", "nano banana pro", "nano banana 2"

Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including scripts (for example `scripts/generate-image.js` and `scripts/package.json`).

It sits in Media & Creative, covering Image generation and Image editing. It works with Google Gemini, WeChat, Slack and Discord. The repository describes itself as: The simplest desktop client for OpenClaw 🦞 — bridge your Agent to WeChat, Feishu, Slack & Discord in one click. Works with Claude Code, Codex & any LLM. BYOK, Oauth… The licence is MIT.

When your agent uses it

Image generation
Nano banana pro

Example prompts

“generate image”
“image generation”
“nano banana”
“/nano-banana”

Requirements

Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit dadfb1c. 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
Ships 2 files in scripts/ (JavaScript), which the agent can run.
Shell commands in SKILL.md call:
- node
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 loads about 757 tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 268 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~45
When it runs · the whole SKILL.md, loaded when a task matches: ~757

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); the scripts in this folder are not scanned.

SKILL.md

The full file from nexu-io/nexu at commit dadfb1c, republished under its MIT licence (© nexu-io). 268 words, ~757 tokens.

Download SKILL.mdSave it as .claude/skills/nano-banana/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.

name: nano-banana
description: Generate or edit images via Nano Banana image models. Triggers on "generate image", "image generation", "nano banana", "edit image", "nano banana pro", "nano banana 2"
homepage: https://ai.google.dev/

Nano Banana — Image Generation

Image generation script supporting three models. Requires sharp for input image compression (auto-installed on first run).

Models

Flag	Notes
`--model nano-banana`	Default. Fast, good quality.
`--model nano-banana-pro`	Highest quality, slower.
`--model nano-banana-2`	Legacy model.

Generate an image

bash

node {baseDir}/scripts/generate-image.js --prompt "a cat sitting on mars" --filename "cat-on-mars.png"

Edit a single image

bash

node {baseDir}/scripts/generate-image.js \
  --prompt "make the sky purple" \
  --filename "edited.png" \
  -i "/path/to/input.png" \
  --model nano-banana-pro

Multi-image composition (up to 14 images)

bash

node {baseDir}/scripts/generate-image.js \
  --prompt "combine these into a collage" \
  --filename "collage.png" \
  -i img1.png -i img2.png -i img3.png

Options

Flag	Short	Default	Description
`--prompt`	`-p`	required	Image description or editing instruction
`--filename`	`-f`	required	Output filename
`--input-image`	`-i`	—	Input image(s), repeatable, max 14
`--model`	—	`nano-banana`	`nano-banana`, `nano-banana-pro`, or `nano-banana-2`
`--resolution`	`-r`	`1K`	`1K`, `2K`, or `4K`
`--aspect-ratio`	—	—	e.g. `1:1`, `16:9`, `4:3`, `3:4`, `9:16`

API key

The API key is pre-configured on this machine. No flags or environment variables needed.

Input image handling

All input images are sent as inline base64. Images over 500 KB are automatically compressed to JPEG and resized to fit under the limit. This keeps requests fast and avoids File API auth issues with the enterprise endpoint.

Output

Relative filenames are saved to $OPENCLAW_STATE_DIR/media/outbound/{slugid}/nano-banana/{filename}. Absolute paths are used as-is. Absolute paths are used as-is. Use timestamps in filenames to avoid overwrites: cat-on-mars-20260304-165000.png.

Sending images to the user

The script prints a MEDIA: <absolute-path> line on stdout. You MUST include this exact MEDIA: line in your reply text so the image is delivered as an attachment in Discord/Slack/chat.

Example reply:

Here's your image!
MEDIA: /Users/alche/.openclaw/media/outbound/my-bot/nano-banana/cat-on-mars.png

Rules:

Copy the MEDIA: line from the script output into your reply verbatim — this is how images get sent
Do NOT read the generated image back with the read tool
Do NOT try to base64 encode or manually attach the image
The MEDIA: line must be on its own line in your response

Files

SKILL.md and 2 other files (scripts) in skills/nexubot/nano-banana of nexu-io/nexu.

SKILL.md
scripts/generate-image.js
scripts/package.json

Open the folder on GitHubat commit dadfb1c

Compare with similar skills

Nano Banana 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 compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Nano Banana this skillnexu-io/nexu	3.3k	—	~757	Automated safety check: Pass	MIT	5 mo ago
Use Avibeavibe-bot/avibe	624	—	~2.5k	Automated safety check: Pass	MIT	today
Chatgpt Image Adkrusemediallc/arcads-claude-code	1.6k	—	~2.7k	Automated safety check: Notes	MIT	18 days ago
Nano Banana Proswarmclawai/swarmclaw	689	—	~481	Automated safety check: Pass	MIT	3 mo ago
Atlas Cloudcalesthio/OpenMontage	66k	—	~1.2k	Automated safety check: Pass	AGPL-3.0	7 days ago
AI Image Creatorevolution-foundation/evo-nexus	545	—	~5.1k	Automated safety check: Notes	Custom licence	5 mo ago

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Works with

Questions about Nano Banana

What does Nano Banana do?

Generate or edit images via Nano Banana image models. An agent skill from nexu-io/nexu. Nano Banana is an agent skill from nexu-io/nexu. Generate or edit images via Nano Banana image models.

When should I use Nano Banana?

Nano Banana fits situations like: image generation; nano banana pro.

How do I install Nano Banana in Claude Code?

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

How do I install Nano Banana in Codex?

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

Can I use Nano Banana 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 nexu-io/nexu --skill nano-banana -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, .gemini/skills/nano-banana, .github/skills/nano-banana and .opencode/skills/nano-banana in your project.

What does Nano Banana need to run?

Going by SKILL.md and its folder, Nano Banana needs JavaScript for the scripts in its folder and the command-line tools its instructions call (node). Our summary lists: Node.js.

Does Nano Banana 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 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Nano Banana use?

Nano Banana 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 use?

About 757 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Nano Banana?

Skills that share tags, products or a category with Nano Banana: Use Avibe (avibe-bot/avibe, 624 stars), Chatgpt Image Ad (krusemediallc/arcads-claude-code, 1.6k stars), Nano Banana Pro (swarmclawai/swarmclaw, 689 stars) and Atlas Cloud (calesthio/OpenMontage, 66k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Nano Banana?

nexu-io (a GitHub organization) maintains it in nexu-io/nexu, which has 3,284 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on April 26, 2026.

Source: nexu-io/nexu 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

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Nano Banana — Image Generation

Models

Generate an image

Edit a single image

Multi-image composition (up to 14 images)

Options

API key

Input image handling

Output

Sending images to the user

Files

Compare with similar skills

Similar skills

More from nexu-io/nexu

Related

Questions about Nano Banana