Initial: pi-skill — 68 skills, 43 extensions, 11 themes for Pi

skills/nano-banana/SKILL.md

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+---
+name: nano-banana
+description: Generate or edit images with OpenRouter using the google/gemini-3.1-flash-image-preview model. Use when the user asks for image generation, wants a new visual from a text prompt, or wants modifications to an existing screenshot or image and expects an image file back.
+allowed-tools: Bash(node agent/skills/nano-banana/generate-image.js:*)
+---
+
+# Nano Banana Image Generation
+
+Use this skill when the user wants an image back, either from a fresh prompt or from editing an existing image.
+
+## Model
+
+- Provider: OpenRouter
+- Model: `google/gemini-3.1-flash-image-preview`
+- Friendly name: Nano Banana
+
+## Supported workflows
+
+1. **Text-to-image**: user provides a prompt, you generate an image.
+2. **Image edit**: user provides an image or screenshot plus instructions, you generate a modified image.
+
+## Before you run
+
+- Make sure the prompt is explicit enough to produce the desired image.
+- If editing an image, first save or locate the input image path in the workspace.
+- The script writes generated files to `.context/generated-images/` by default.
+
+## Usage
+
+### Generate a new image
+
+```bash
+node agent/skills/nano-banana/generate-image.js \
+  --prompt "A clean product hero shot of a matte black coffee grinder on a soft beige background, studio lighting" \
+  --output .context/generated-images/coffee-grinder.png
+```
+
+### Edit an existing image
+
+```bash
+node agent/skills/nano-banana/generate-image.js \
+  --prompt "Keep the layout the same, but change the CTA button to green, replace the headline with 'Ship faster', and make the page look more premium" \
+  --input-image path/to/screenshot.png \
+  --output .context/generated-images/edited-screenshot.png
+```
+
+## Response handling
+
+- The script prints JSON with an `output` field containing the saved image path.
+- After running it, tell the user the output file path.
+- If the model returns no image, inspect the JSON warning and summarize the failure clearly.
+
+## Notes
+
+- Prefer PNG outputs unless the user asks for another format.
+- Preserve existing composition when the user asks for modifications to a screenshot.
+- If the user’s request is ambiguous, clarify what should change and what must remain untouched.