OpenClaw-Image-Generator

A Claude Code skill for generating images via the Evolink Z-Image-Turbo API. Cross-platform, zero dependencies — works natively on Windows, macOS, and Linux.

Features

• Cross-platform: uses curl (natively available on all modern OS)
• No shell escaping issues: user prompts are passed via bash heredoc, no temp files needed
• Auto-download: images saved locally as evolink-{timestamp}.webp
• Configurable size, seed, and polling parameters
• Standard Skill structure with progressive disclosure

Skill Structure

generate-z-image/
├── SKILL.md                 # Main skill file (YAML frontmatter + instructions)
├── scripts/
│   └── generate.sh          # Bash script template
└── references/
    └── api-reference.md     # API documentation

Installation

Copy the generate-z-image/ folder to your project's Claude Code commands directory:

# In your project root
mkdir -p .claude/commands
cp -r generate-z-image .claude/commands/

Prerequisites

You need an Evolink API Key. If you don't have one:

1. Register at https://evolink.ai/signup
2. Go to https://evolink.ai/dashboard/keys to create a key

Set it as a system environment variable so the skill can auto-detect it:

# Windows (PowerShell, requires restart terminal)
[System.Environment]::SetEnvironmentVariable('EVOLINK_API_KEY', 'your-key-here', 'User')

# macOS / Linux
echo 'export EVOLINK_API_KEY="your-key-here"' >> ~/.bashrc && source ~/.bashrc

If not set, Claude will prompt you for the key on first use.

Usage

In Claude Code, type:

/generate-z-image a cat sitting on the moon

Or simply /generate-z-image and Claude will ask for your prompt.

Examples

# Basic usage — just describe what you want
/generate-z-image a cyberpunk city at night with neon lights

# Specify aspect ratio in your prompt
/generate-z-image a portrait photo of a woman, size 9:16

# Request a specific seed for reproducibility
/generate-z-image a watercolor landscape, seed 42

How It Works

1. Claude checks for your EVOLINK_API_KEY environment variable (prompts you if not set)
2. Submits your prompt to the Evolink Z-Image-Turbo API
3. Polls the task status every 10 seconds (up to 200 retries)
4. Downloads the generated image as evolink-{timestamp}.webp to your working directory

Parameters

Parameter	Required	Default	Description
prompt	Yes	—	Image description
size	No	1:1	Aspect ratio: 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9, 1:2, 2:1, or custom WxH (376-1536px)
seed	No	random	Random seed for reproducibility
nsfw_check	No	false	Enable stricter NSFW content filtering

Notes

• Image URLs expire in 72 hours — images are auto-downloaded locally as evolink-{timestamp}.webp
• First-time use will prompt for your API key; set EVOLINK_API_KEY as a system environment variable to skip this step