ReddRadar
Agent skill
screenshot-annotator
Add manual-style annotations (red boxes, arrows, callouts, highlights) to screenshots for technical documentation. Use when creating user manuals, tutorials, or guides that need visual indicators pointing to UI elements.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/screenshot-annotator
SKILL.md
Screenshot Annotator
Add annotations to screenshots without modifying the original image. Annotations are overlaid on top.
Workflow
- Analyze the screenshot to identify the target element
- Generate annotation overlay using Gemini Vision API
- Output annotated image as a separate file
Usage
python scripts/annotate.py "{image_path}" "{instruction}" --style "{style}" --text "{label}" --output "{output_path}"
Parameters
| Parameter | Required | Default | Description |
|---|---|---|---|
| image_path | Yes | - | Path to screenshot |
| instruction | Yes | - | What to annotate (e.g., "the Login button") |
| --style | No | red_box | Annotation style |
| --text | No | - | Text label to add |
| --output | No | auto | Output path |
Styles
| Style | Description |
|---|---|
| red_box | Red rectangle + arrow (default) |
| arrow | Red arrow pointing to element |
| callout | Speech bubble with text |
| highlight | Semi-transparent yellow overlay |
| circle | Red circle around element |
| number | Numbered marker for steps |
Examples
# Basic annotation
python scripts/annotate.py "login.png" "the Login button"
# With text label
python scripts/annotate.py "settings.png" "the gear icon" --text "Click here"
# Callout style
python scripts/annotate.py "form.png" "email field" --style callout --text "Enter your email"
Requirements
- GEMINI_API_KEY or GOOGLE_API_KEY in environment
- Python packages: google-genai, Pillow, python-dotenv
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