A modern ComfyUI custom node package that provides essential UI controls for image generation workflows. These nodes allow you to centralize commonly shared parameters (scheduler, sampler, dimensions, seeds) and link them to multiple nodes in your workflow, eliminating redundancy while maintaining JSON metadata compatibility.

Features

Sampler Selector: Choose from all current ComfyUI-supported sampling methods
Scheduler Selector: Select from all current ComfyUI-supported schedulers
Seed Generator: Generate, increment, or randomize seeds with advanced controls
Width & Height Nodes: Individual dimension controls with preset support
Combined Width/Height Node: Dual dimension control with swap functionality and presets
Modern ComfyUI Standards: Follows 2024 ComfyUI development best practices
JSON Compatible: Maintains workflow JSON compatibility for sharing and version control

Installation

Navigate to your ComfyUI custom_nodes directory

Clone this repository:

git clone https://github.com/your-username/ComfyUI_Selectors.git

Restart ComfyUI
The nodes will appear in the Selectors/ category

Available Nodes

Sampling Nodes (`Selectors/Sampling`)

Sampler Selector

Function: Centralized sampler selection
Output: Sampler name for use in KSampler nodes
Supported Samplers: All current ComfyUI samplers including euler, dpmpp_2m, ddim, etc.

Scheduler Selector

Function: Centralized scheduler selection
Output: Scheduler name for use in KSampler nodes
Supported Schedulers: normal, karras, exponential, sgm_uniform, simple, ddim_uniform, beta

Generation Nodes (`Selectors/Generation`)

Seed Generator

Function: Advanced seed generation with multiple control modes
Controls:
- seed: Base seed value (0-18446744073709551615)
- control_after_generate: How to handle seed after generation
  - fixed: Keep seed unchanged
  - increment: Increase seed by 1
  - decrement: Decrease seed by 1
  - randomize: Generate random seed
Output: Seed value for use in KSampler nodes

Dimension Nodes (`Selectors/Dimensions`)

Width Node

Function: Image width selection with presets
Controls:
- width: Custom width value (64-8192, step 8)
- preset: Quick selection (custom, 512, 768, 1024, 1152, 1216, 1344, 1408, 1472, 1536)
Output: Width value for use in latent image nodes

Height Node

Function: Image height selection with presets
Controls:
- height: Custom height value (64-8192, step 8)
- preset: Quick selection (custom, 512, 768, 1024, 1152, 1216, 1344, 1408, 1472, 1536)
Output: Height value for use in latent image nodes

Width & Height Node

Function: Combined dimension control with advanced features
Controls:
- width: Custom width value (64-8192, step 8)
- height: Custom height value (64-8192, step 8)
- preset: Common dimension presets (512x512, 768x512, 1024x768, etc.)
- swap_dimensions: Toggle to swap width and height values
Outputs: Both width and height values
Presets Include: Square formats, landscape, portrait, and popular ratios

Usage Examples

Basic Workflow Setup

Add a Sampler Selector node and choose your preferred sampler
Add a Scheduler Selector node and choose your scheduler
Add a Seed Generator node and set control mode
Add a Width & Height Node and choose dimensions
Connect outputs to your KSampler and latent image nodes

Centralized Parameter Management

Use selector nodes to set parameters once
Connect outputs to multiple destination nodes
Change settings in one place to affect entire workflow
Maintain clean, organized node graphs

Preset Workflows

Use dimension presets for quick setup of common aspect ratios
Use seed randomize mode for variation generation
Combine nodes for complex parameter linking scenarios

Technical Details

ComfyUI Compatibility

Built for ComfyUI 2024+ standards
Compatible with all current sampler and scheduler types
Maintains JSON workflow compatibility
Supports widget conversion and parameter linking

Node Categories

Selectors/Sampling: Sampler and scheduler selection
Selectors/Generation: Seed and generation control
Selectors/Dimensions: Width, height, and dimension control

Output Types

Sampler/Scheduler: ComfyUI COMBO types with current options
Dimensions/Seeds: Standard INT types with proper validation
JSON Metadata: Maintains workflow sharing compatibility

Development

Setup

Create virtual environment:

python -m venv venv
source venv/bin/activate  # Linux/Mac
# or
venv\Scripts\activate     # Windows

Install development dependencies:
```
pip install -r requirements-dev.txt
```

Testing

The project includes comprehensive testing with mock ComfyUI environment:

# Run all tests (recommended)
python run_tests.py

# Run individual pytest tests
pytest tests/unit/           # Unit tests
pytest tests/integration/    # Integration tests

# Check code formatting
black --check .
isort --check-only .
flake8 .

Project Structure

nodes/                   # ComfyUI node implementations
tests/                   # Test suites with mock ComfyUI
├── mocks/              # Mock ComfyUI modules
├── unit/               # Unit tests
└── integration/        # Integration tests
run_tests.py            # Standalone test runner
requirements-dev.txt    # Development dependencies

Contributing

Follow ComfyUI development standards
Use the provided test framework with mock ComfyUI environment
Maintain backward compatibility
Add tests for new functionality
Update documentation
Ensure all tests pass before submitting PRs

Code Quality

Formatting: Black (88 character line limit)
Import sorting: isort
Linting: flake8
Testing: Custom test runner with comprehensive mock setup

Version History

Version 1.0 (Initial Release)

✅ Sampler Selector with all current ComfyUI samplers
✅ Scheduler Selector with all current ComfyUI schedulers
✅ Seed Generator with advanced control modes (fixed/increment/decrement/randomize)
✅ Width Node with preset support
✅ Height Node with preset support
✅ Combined Width & Height Node with swap functionality and dimension presets
✅ Modern ComfyUI 2024 standards compliance
✅ Full JSON workflow compatibility
✅ Comprehensive documentation and testing

License

[Add your license here]

Support

[Add support information here]

README.md

ComfyUI Selectors