screenshot-annotator

Documents

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.

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/screenshot-annotator/SKILL.md

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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