Agent skill

Nano Banana

REQUIRED for all image generation requests. An agent skill from jh941213/my-cc-harness.

No licenceAuto-check: notesMedia & Creative

Install Nano Banana

skills CLI

$ npx skills add jh941213/my-cc-harness --skill nano-banana -a claude-code

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

GitHub CLI

$ gh skill install jh941213/my-cc-harness 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/jh941213/my-cc-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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 jh941213/my-cc-harness --skill nano-banana -a codex

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

GitHub CLI

$ gh skill install jh941213/my-cc-harness 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/jh941213/my-cc-harness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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 jh941213/my-cc-harness --skill nano-banana -a cursor

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

GitHub CLI

$ gh skill install jh941213/my-cc-harness 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/jh941213/my-cc-harness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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/jh941213/my-cc-harness.git --path skills_en/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 jh941213/my-cc-harness --skill nano-banana -a gemini-cli

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

GitHub CLI

$ gh skill install jh941213/my-cc-harness 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/jh941213/my-cc-harness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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 jh941213/my-cc-harness 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 jh941213/my-cc-harness --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/jh941213/my-cc-harness.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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 jh941213/my-cc-harness --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 jh941213/my-cc-harness 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/jh941213/my-cc-harness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills_en/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/jh941213/my-cc-harness/tree/main/skills_en/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: 125
Token cost: ~1.6k tokens
SKILL.md length: 448 words
Files: 1
Skills in repo: 62
Repo updated: Aug 3, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

REQUIRED for all image generation requests. An agent skill from jh941213/my-cc-harness.

Works in 6 steps: Install Python SDK → Set API Key (paid required -- free keys… → Determine Output Path → …
The user asks to create
SKILL.md covers When to Use This Skill, Prerequisites, Image Generation (Python SDK… and Execution Pattern, plus 6 more sections
Calls pip and gemini; needs GEMINI_API_KEY

What it does

Nano Banana is an agent skill from jh941213/my-cc-harness. REQUIRED for all image generation requests. Generate and edit images using Nano Banana 2 (Gemini 3.1 Flash Image). Handles blog featured images, YouTube thumbnails, icons, diagrams, patterns, illustrations, photos, visual assets, graphics, artwork, pictures. Use this skill whenever the user asks to create, generate, make, draw, design, or edit any image or visual content.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Image generation. It works with Google Gemini and YouTube.

When your agent uses it

The user asks to create
Tasks that involve Image generation

Example prompts

“/nano-banana”

Requirements

Python 3
A credential in GEMINI_API_KEY
Pre-approved tools (allowed-tools): Bash(gemini:*), Bash(python3:*), Read

Workflow steps

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

Install Python SDK
Set API Key (paid required -- free keys cannot generate images)
Determine Output Path
Load API Key
Optimize Prompt
Execute Generation + Verify Result

What it can do on your machine

Read from SKILL.md and the folder at commit e9210e2. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- Bash(gemini:*)
- Bash(python3:*)
- Read
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- pip
- gemini
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- GEMINI_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Nano Banana loads about 1.6k tokens when it runs. Until then it costs about 97 tokens; SKILL.md has 448 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~97
When it runs · the whole SKILL.md, loaded when a task matches: ~1.6k

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteMentions a .env fileSKILL.md:36
```
Or auto-load from project `.env` file.
```

NoteMentions a .env fileSKILL.md:100

# Try environment variable -> .env file in order

NoteMentions a .env fileSKILL.md:104
```
# Attempt to load from .env file
```

NoteMentions a .env fileSKILL.md:105

for env_path in [".env", "../.env", os.path.expanduser("~/.env")]:

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 448 words (~1,596 tokens).

“Generates professional images with Nano Banana 2 (gemini-3.1-flash-image-preview). Pro-level quality at Flash speed -- 512px to 4K, various aspect ratios, multilingual text rendering support.”

— opening of SKILL.md by jh941213

name: nano-banana
allowed-tools: Bash(gemini:*), Bash(python3:*), Read
user-invocable: true

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills_en/nano-banana of jh941213/my-cc-harness.

Open the folder on GitHubat commit e9210e2

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 skilljh941213/my-cc-harness	125	—	~1.6k	Automated safety check: Notes	None	2 mo ago
Nano Bananakkoppenhaver/cc-nano-banana	378	1 repos	~1.4k	Automated safety check: Pass	MIT	4 mo ago
Generate Youtube Thumbnailkrusemediallc/arcads-claude-code	1.6k	—	~2.4k	Automated safety check: Notes	MIT	18 days ago
Youtube Thumbnailhassancs91/claude-youtube-editor	328	—	~2.1k	Automated safety check: Notes	MIT	1 mo ago
Youtube Thumbnailsswyxio/skills	176	—	~1.6k	Automated safety check: Pass	MIT	6 days ago
Nano Bananaglebis/claude-skills	391	—	~2.1k	Automated safety check: Pass	MIT	3 days ago

Similar skills

Nano Banana
kkoppenhaver/cc-nano-banana
REQUIRED for all image generation requests. An agent skill from kkoppenhaver/cc-nano-banana.
378 GitHub starsUsed in 1 repo~1.4k tokens
Media & CreativeAuto-check passed
Generate Youtube Thumbnail
krusemediallc/arcads-claude-code
Generate high-CTR YouTube thumbnails using Nano Banana 2 via the Arcads external API.
1.6k GitHub stars~2.4k tokensUpdated 18 days ago
Media & CreativeAuto-check: notes
Youtube Thumbnail
hassancs91/claude-youtube-editor
Dedicated YouTube thumbnail generator — interviews you for exactly the style elements you want (environment, text budget, extras, accent color), then renders high-contrast, vibrant, face-consistent…
328 GitHub stars~2.1k tokensUpdated 1 mo ago
Media & CreativeAuto-check: notes
Youtube Thumbnails
swyxio/skills
This skill should be used when the user asks to "create YouTube thumbnails", "generate thumbnails", "make video thumbnails", or needs AI-generated thumbnail images via Google Gemini for YouTube…
176 GitHub stars~1.6k tokensUpdated 6 days ago
Media & CreativeAuto-check passed
Nano Banana
glebis/claude-skills
Generate and edit images using Google's Gemini image generation models (Nano Banana family).
391 GitHub stars~2.1k tokensUpdated 3 days ago
Media & CreativeAuto-check passed
Thumbnail Design
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Design YouTube video thumbnails that earn the click — mobile-legible, one focal point, honest.
134 GitHub stars~1.7k tokensUpdated 9 days ago
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Questions about Nano Banana

What does Nano Banana do?

REQUIRED for all image generation requests. An agent skill from jh941213/my-cc-harness. Nano Banana is an agent skill from jh941213/my-cc-harness. REQUIRED for all image generation requests.

When should I use Nano Banana?

Nano Banana fits situations like: the user asks to create; tasks that involve Image generation.

How do I install Nano Banana in Claude Code?

Run `npx skills add jh941213/my-cc-harness --skill nano-banana -a claude-code`. Or copy the skill folder (skills_en/nano-banana in jh941213/my-cc-harness) 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 jh941213/my-cc-harness --skill nano-banana -a codex`. Or copy the skill folder (skills_en/nano-banana in jh941213/my-cc-harness) 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 jh941213/my-cc-harness --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 the command-line tools its instructions call (pip and gemini) and credentials named GEMINI_API_KEY. Our summary lists: Python 3; A credential in GEMINI_API_KEY. Its frontmatter pre-approves these tools: Bash(gemini:*), Bash(python3:*), Read.

Does Nano Banana access the network?

SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Nano Banana safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Nano Banana use?

No licence was found for Nano Banana or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Nano Banana use?

About 1.6k tokens (SKILL.md is roughly 6.4k 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: Nano Banana (kkoppenhaver/cc-nano-banana, 378 stars), Generate Youtube Thumbnail (krusemediallc/arcads-claude-code, 1.6k stars), Youtube Thumbnail (hassancs91/claude-youtube-editor, 328 stars) and Youtube Thumbnails (swyxio/skills, 176 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Nano Banana?

jh941213 (a GitHub user) maintains it in jh941213/my-cc-harness, which has 125 GitHub stars. The repository holds 62 skills in this directory. The repository was last updated on August 3, 2026.

Source: jh941213/my-cc-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Nano Banana

Install Nano Banana

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

Files

Compare with similar skills

Similar skills

Nano Banana

Generate Youtube Thumbnail

Youtube Thumbnail

Youtube Thumbnails

Nano Banana

Thumbnail Design

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Questions about Nano Banana

Install Nano Banana

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

Files

Compare with similar skills

Similar skills

More from jh941213/my-cc-harness

Related

Questions about Nano Banana