Agent skill

Imagegen

Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references.

Apache-2.0Auto-check passedMedia & Creative

Install Imagegen

skills CLI

$ npx skills add nexu-io/open-design --skill imagegen -a claude-code

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

GitHub CLI

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

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/open-design --skill imagegen -a codex

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

GitHub CLI

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

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

GitHub CLI

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

--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/open-design --skill imagegen -a gemini-cli

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

GitHub CLI

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

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/open-design --skill imagegen -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/open-design.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/imagegen .github/skills/imagegen && 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 "imagegen" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/imagegen into .github/skills/imagegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "imagegen", 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/open-design --skill imagegen -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/open-design imagegen --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/open-design.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/imagegen .opencode/skills/imagegen && 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 "imagegen" agent skill from https://github.com/nexu-io/open-design/tree/main/skills/imagegen into .opencode/skills/imagegen/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "imagegen", 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: imagegen
GitHub stars: 100k
Token cost: ~300 tokens
SKILL.md length: 98 words
Files: 1
Skills in repo: 245
Repo updated: Oct 9, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references.

Tasks that involve Image generation
SKILL.md covers What it does, Source and How to use
Reaches github.com
Tasks that involve UI design

What it does

Imagegen is an agent skill from nexu-io/open-design. Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references.

Its SKILL.md is about 300 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, UI design and Icons and illustration. It works with OpenAI. The repository describes itself as: 🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes… The licence is Apache-2.0.

When your agent uses it

Tasks that involve Image generation
Tasks that involve UI design
Tasks that involve Icons and illustration

Example prompts

“/imagegen”

What it can do on your machine

Read from SKILL.md and the folder at commit d9dd6fe. 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 bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- github.com
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

Imagegen loads about 300 tokens when it runs. Until then it costs about 38 tokens; SKILL.md has 98 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~38
When it runs · the whole SKILL.md, loaded when a task matches: ~300

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 nexu-io/open-design at commit d9dd6fe, republished under its Apache-2.0 licence (© nexu-io). 98 words, ~300 tokens.

Download SKILL.mdSave it as .claude/skills/imagegen/SKILL.md (or your agent's skills folder).

name: imagegen
description: Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references.
triggers: generate image, create image, image gen, openai image, icon design, mockup
od.mode: image
od.category: image-generation
od.upstream: https://github.com/openai/skills

imagegen

Curated from OpenAI's skills repository.

What it does

Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references.

Source

Upstream: https://github.com/openai/skills
Category: image-generation

How to use

This catalogue entry advertises the skill in OpenDesign so the agent discovers it during planning. To run the full upstream workflow with its original assets, scripts, and references, install the upstream bundle into your active agent's skills directory:

bash

# Inspect the upstream README for exact paths
open https://github.com/openai/skills

Then ask the agent to invoke this skill by name (imagegen) or with one of the trigger phrases listed in this skill's frontmatter.

Files

Just SKILL.md in skills/imagegen of nexu-io/open-design.

Open the folder on GitHubat commit d9dd6fe

Compare with similar skills

Imagegen 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.

Imagegen compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Imagegen this skillnexu-io/open-design	100k	—	~300	Automated safety check: Pass	Apache-2.0	today
Generating Imagesspencerpauly/awesome-cursor-skills	843	—	~3.7k	Automated safety check: Notes	CC0-1.0	2 mo ago
Omd Mediakwakseongjae/oh-my-design	531	—	~1.1k	Automated safety check: Pass	MIT	8 days ago
Flux2 Klein PromptingAnastasiyaW/codex-claude-code-config	154	—	~2.8k	Automated safety check: Pass	MIT	today
Imagensanjay3290/ai-skills	431	6 repos	~657	Automated safety check: Pass	Apache-2.0	28 days ago
Web Visualsglifxyz/glif-mcp-server	212	—	~1.5k	Automated safety check: Pass	MIT	today

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Works with

OpenAI

Questions about Imagegen

What does Imagegen do?

Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references. Imagegen is an agent skill from nexu-io/open-design. Generate and edit images using OpenAI's Image API for project assets — UI mockups, icons, illustrations, social cards, and visual references.

When should I use Imagegen?

Imagegen fits situations like: tasks that involve Image generation; tasks that involve UI design; tasks that involve Icons and illustration.

How do I install Imagegen in Claude Code?

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

How do I install Imagegen in Codex?

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

Can I use Imagegen 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/open-design --skill imagegen -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/imagegen, .gemini/skills/imagegen, .github/skills/imagegen and .opencode/skills/imagegen in your project.

What does Imagegen need to run?

SKILL.md names no scripts, command-line tools or credentials: Imagegen is instructions for the agent only.

Does Imagegen access the network?

SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Imagegen 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 Imagegen use?

Imagegen is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Imagegen use?

About 300 tokens (SKILL.md is roughly 1.2k 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 Imagegen?

Skills that share tags, products or a category with Imagegen: Generating Images (spencerpauly/awesome-cursor-skills, 843 stars), Omd Media (kwakseongjae/oh-my-design, 531 stars), Flux2 Klein Prompting (AnastasiyaW/codex-claude-code-config, 154 stars) and Imagen (sanjay3290/ai-skills, 431 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Imagegen?

nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 100,100 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 9, 2026.

Source: nexu-io/open-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Imagegen

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

imagegen

What it does

Source

How to use

Files

Compare with similar skills

Similar skills

More from nexu-io/open-design

Related

Questions about Imagegen