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Gemini Web Client

baoyu-gemini-web

Image generation skill using Gemini Web. Generates images from text prompts via Google Gemini. Also supports text generation. Use as the image generation backend for other skills like cover-image, xhs-images, article-illustrator.

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SKILL.md

Full skill instructions

Gemini Web Client

Quick start

npx -y bun scripts/​main.ts "Hello, Gemini"
npx -y bun scripts/​main.ts --prompt "Explain quantum computing"
npx -y bun scripts/​main.ts --prompt "A cute cat" --image cat.png
npx -y bun scripts/​main.ts --promptfiles system.md content.md --image out.png

Commands

Text generation

# Simple prompt (positional)
npx -y bun scripts/​main.ts "Your prompt here"

# Explicit prompt flag
npx -y bun scripts/​main.ts --prompt "Your prompt here"
npx -y bun scripts/​main.ts -p "Your prompt here"

# With model selection
npx -y bun scripts/​main.ts -p "Hello" -m gemini-2.5-pro

# Pipe from stdin
echo "Summarize this" | npx -y bun scripts/​main.ts

Image generation

# Generate image with default path (./​generated.png)
npx -y bun scripts/​main.ts --prompt "A sunset over mountains" --image

# Generate image with custom path
npx -y bun scripts/​main.ts --prompt "A cute robot" --image robot.png

# Shorthand
npx -y bun scripts/​main.ts "A dragon" --image=dragon.png

Output formats

# Plain text (default)
npx -y bun scripts/​main.ts "Hello"

# JSON output
npx -y bun scripts/​main.ts "Hello" --json

Options

OptionShortDescription
--prompt <text>-pPrompt text
--promptfiles <files...>Read prompt from files (concatenated in order)
--model <id>-mModel: gemini-3-pro (default), gemini-2.5-pro, gemini-2.5-flash
--image [path]Generate image, save to path (default: generated.png)
--jsonOutput as JSON
--loginRefresh cookies only, then exit
--cookie-path <path>Custom cookie file path
--profile-dir <path>Chrome profile directory
--help-hShow help

Models

  • gemini-3-pro - Default, latest model
  • gemini-2.5-pro - Previous generation pro
  • gemini-2.5-flash - Fast, lightweight

Authentication

First run opens Chrome to authenticate with Google. Cookies are cached for subsequent runs.

# Force cookie refresh
npx -y bun scripts/​main.ts --login

Environment variables

VariableDescription
GEMINI_WEB_DATA_DIRData directory
GEMINI_WEB_COOKIE_PATHCookie file path
GEMINI_WEB_CHROME_PROFILE_DIRChrome profile directory
GEMINI_WEB_CHROME_PATHChrome executable path

Examples

Generate text response

npx -y bun scripts/​main.ts "What is the capital of France?"

Generate image

npx -y bun scripts/​main.ts "A photorealistic image of a golden retriever puppy" --image puppy.png

Get JSON output for parsing

npx -y bun scripts/​main.ts "Hello" --json | jq '.text'

Generate image from prompt files

# Concatenate system.md + content.md as prompt
npx -y bun scripts/​main.ts --promptfiles system.md content.md --image output.png

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