Generate images from text, edit an existing picture, or combine up to three source images using Gemini 3 Pro Image through OpenRouter. Choose 1K, 2K, or 4K output and save the results as image files.
Generate or edit images via OpenRouter with the Gemini 3 Pro Image model. Use for prompt-only image generation, image edits, and multi-image compositing; supports 1K/2K/4K output.
Review the instructions the agent will receive before you install.
Generate or edit images with OpenRouter using the google/gemini-3-pro-image-preview model. Support prompt-only generation, single-image edits, and multi-image composition.
uv run {baseDir}/scripts/generate_image.py \
--prompt "A cinematic sunset over snow-capped mountains" \
--filename sunset.png
uv run {baseDir}/scripts/generate_image.py \
--prompt "Replace the sky with a dramatic aurora" \
--input-image input.jpg \
--filename aurora.png
uv run {baseDir}/scripts/generate_image.py \
--prompt "Combine the subjects into a single studio portrait" \
--input-image face1.jpg \
--input-image face2.jpg \
--filename composite.png
--resolution with 1K, 2K, or 4K.1K if not specified.The skill reads an optional system prompt from assets/SYSTEM_TEMPLATE. This allows you to customize the image generation behavior without modifying code.
--input-image.--filename accepts relative paths (saves to current directory) or absolute paths.-1, -2, etc. to the filename.MEDIA: <path> for each saved image. Do not read images back into the response.If the script exits non-zero, check stderr against these common blockers:
| Symptom | Resolution |
|---|---|
OPENROUTER_API_KEY is not set | Ask the user to set it. PowerShell: $env:OPENROUTER_API_KEY = "sk-or-..." / bash: export OPENROUTER_API_KEY="sk-or-..." |
uv: command not found or not recognized | macOS/Linux: <code>curl -LsSf https://astral.sh/uv/install.sh | sh</code>. Windows: <code>powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"</code>. Then restart the terminal. |
AuthenticationError / HTTP 401 | Key is invalid or has no credits. Verify at https://openrouter.ai/settings/keys. |
For transient errors (HTTP 429, network timeouts), retry once after 30 seconds. Do not retry the same error more than twice — surface the issue to the user instead.
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