How I Built a Prompt Generator to Create 10K+ AI Image Prompts for My ML Dataset

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How I Built a Prompt Generator to Create 10K+ AI Image Prompts for My ML Dataset

The Problem

I was training a custom ML model and needed a large, diverse image dataset. My options:

Scrape the internet - Copyright issues, inconsistent quality, messy metadata
Use GPT - Repetitive outputs, no structure, expensive at scale
Generate my own images - But I needed thousands of unique, categorized prompts

Manually writing prompts? Not an option.

The Solution: PromptAnvil

I built PromptAnvil - a prompt configuration tool that generates hundreds of unique, structured prompts in seconds.

Core Concept

Instead of writing prompts one by one, you define:

Categories (subject, style, lighting, mood, etc.)
Entries with optional weights
Templates using {tokens}
Logic rules for context control

Then hit generate → get unique combinations.

Quick Example

Categories:
- subject: cat, dog, owl
- style: watercolor, oil painting, pixel art
- mood: peaceful, dramatic

Template: "{subject} in {style} style, {mood} atmosphere"

Output:
→ "cat in watercolor style, peaceful atmosphere"
→ "owl in pixel art style, dramatic atmosphere"
→ ... 18 unique combinations

Scale up to thousands by adding more entries.

Key Features

1. Weighted Randomization

subject:
  - warrior (weight: 3)
  - mage (weight: 1)
  - archer (weight: 1)

Warrior appears 60% of the time.

2. Conditional Logic

IF subject = "archer" THEN setting = "forest"
IF setting = "ruins" THEN EXCLUDE mood = "peaceful"

No more archers in castles or peaceful ruins.

3. Tag Linking

Group related entries across categories:

Tag "cyber":
- setting: neon-lit megacity
- clothing: tech jacket
- lighting: pink neon glow

When one is selected, others follow. Context stays coherent.

4. Export Options

JSON - For programmatic pipelines
TXT - One prompt per line
CSV - With category metadata

Perfect for batch processing with ComfyUI, Automatic1111, or custom scripts.

5. AI-Powered Helpers

Config Generator - Describe what you want, AI builds the entire configuration
Entry Generator - AI suggests entries for your categories
Logic Rule Generator - AI creates smart conditional rules
Prompt Refiner - 3-agent pipeline (Critic → Refiner → Evaluator) improves your prompts

Still in active development, but already saves time of manual setup.