Create Image

create-image

Generate images using FREE AI image generation backends.

Features

• Ollama (local) - Z-Image Turbo or FLUX2-Klein via Ollama (FREE, no internet)
• Gemini 2.5 Flash Image - AI-generated images via Google gemini-2.5-flash-image (FREE with API key)
• FLUX.1-schnell - AI-generated images via HuggingFace (FREE remote)
• Mermaid diagrams - Flowcharts and architecture diagrams (FREE)
• Placeholder images - Random grayscale from picsum.photos (FREE)
• Solid color - Gray box with text label (always works)
• Size control - Specify dimensions for PDF embedding (auto-resized)

Quick Start

cd .pi/skills/create-image

# Generate an AI image (uses Gemini or FLUX)
uv run --script generate.py "hardware verification flowchart for microprocessor" \
  --output test_figure.png \
  --size 400x600

# Generate with specific backend
uv run --script generate.py "network security architecture" \
  --output security_arch.png \
  --size 800x600 \
  --backend flux

# Use placeholder fallback
uv run --script generate.py "placeholder" \
  --output placeholder.png \
  --size 400x300 \
  --backend placeholder

Commands

generate - Create an image

uv run --script generate.py "<prompt>" [options]

Arguments:

Options:

Backends

Setup

Option 1: Ollama (macOS only - MLX framework)

Note: Ollama image generation currently only works on macOS (Apple Silicon). Linux/NVIDIA support is "coming soon" per Ollama docs.

# macOS only
ollama pull x/z-image-turbo
# or
ollama pull x/flux2-klein

Option 2: Google Gemini 2.5 Flash Image (Nano Banana) (FREE API)

Get a FREE API key from aistudio.google.com:

export GEMINI_API_KEY="your_api_key_here"
# or
export GOOGLE_API_KEY="your_api_key_here"

Note: This uses the gemini-2.5-flash-image model (aka "nano-banana") via the REST API. No special SDK installation required (uses requests). Image generation counts against your daily Pro quota (~1000 images/day). Either GEMINI_API_KEY or GOOGLE_API_KEY will work.

Option 3: HuggingFace Token (FREE Remote)

Get a FREE HuggingFace token from huggingface.co/settings/tokens:

export HF_TOKEN="hf_your_token_here"

Option 4: Mermaid (for Diagrams)

npm install -g @mermaid-js/mermaid-cli

Example Prompts

Security Documents

"APT attack kill chain diagram with reconnaissance, weaponization, delivery, exploitation phases"
"network intrusion detection system architecture"
"malware analysis workflow flowchart"

Engineering Documents

"hardware verification flow for microprocessor with RTL, synthesis, and timing analysis"
"FPGA design pipeline from HDL to bitstream"
"embedded systems boot sequence diagram"

Scientific Documents

"machine learning pipeline with data preprocessing, training, and inference stages"
"experimental methodology flowchart"
"system architecture diagram with numbered components"

Cached Images (Reuse Before Generating)

Pre-generated images are available in cached_images/ - use these first to avoid unnecessary API calls:

# Copy cached image instead of generating
cp cached_images/flowchart.png /path/to/output.png

Integration with PDF Generation

After generating images, embed them in PDFs:

import fitz  # PyMuPDF

doc = fitz.open()
page = doc.new_page()

# Insert generated image
img_rect = fitz.Rect(50, 200, 450, 500)  # x0, y0, x1, y1
page.insert_image(img_rect, filename="test_figure.png")

doc.save("fixture_with_figure.pdf")

Dependencies

dependencies = [
    "huggingface_hub>=0.26.0",
    "httpx",
    "typer",
    "pillow",
]