A collection of custom nodes for ComfyUI designed to enhance and streamline your prompt engineering workflow.
These nodes provide tools for generating, combining, enhancing, and selecting prompts dynamically.

• 📦 Installation
• 📖 Nodes Overview
  • 📃 Brekel Prompt Enhancer (LLM)
  • 📃 Brekel Auto Prompt Generator
  • 📃 Brekel Prompt Chooser
• 📝 Author

1. Open the ComfyUI Manager.
2. Click on Install Custom Nodes.
3. Search for Brekel or the name of one of the nodes.
4. Click Install on the desired node pack.
5. Restart ComfyUI.

The manager will automatically handle the installation and download any required dependencies for the Prompt Enhancer (LLM) node.

1. Navigate to your ComfyUI custom nodes directory:

   cd ComfyUI/custom_nodes/

2. Clone this repository:

   git clone https://github.com/brekel/ComfyUI-Brekel.git

3. Install the required Python packages for the Prompt Enhancer (LLM) node:

   cd ComfyUI-Brekel
   pip install -r requirements.txt

4. Restart ComfyUI.

This node uses a local Large Language Model (LLM) to creatively rewrite and enhance a simple input prompt into a more detailed and descriptive one.
No need for 3rd party apps or cloud API calls, all from within ComfyUI

LLM Models: This node uses LLM models from the ComfyUI/models/LLM/ directory.
The node expects models in the standard Hugging Face format (i.e., the folder should contain config.json, model.safetensors, etc.).

Some LLM model suggestions:

To install a model:

• Open a command prompt in the ComfyUI/models/LLM/ directory.
• On the HuggingFace page click the three dots icon (just left to the Train button) and select Clone Repository.
• Copy the command that starts with: git clone https://.......
• Paste and execute this command in your command prompt.
• You may need to run the git lfs install first to install Large File Support.
• Some models (like Llama) may need you to request access first from the Model card page, approval make take while

System Prompts: The node reads "system prompts" (instructions for the LLM) from .txt files located in ComfyUI/custom_nodes/ComfyUI-Brekel/prompt_enhancer/.
This folder is included with the installation and contains default system prompts for text-to-image and text-to-video. You can edit these or add your own .txt files to create custom LLM behaviors. (the node will automatically add a line to the prompt to ask the LLM to respect the max_length)

This node constructs a complete prompt by combining up to four randomly selected lines from different text files with a optional prefix/postfix. It's a powerful tool for creating complex, semi-randomized prompts while still allowing full control by customizing the text file contents.

1. This node reads from .txt files located in the ComfyUI/custom_nodes/ComfyUI-Brekel/auto_prompt_generator/ folder, which is included with the installation.
2. Populate this folder with your own .txt files or edit the existing examples. Each file should contain a list of items, one per line (e.g., a file for styles, another for artists, another for lighting types). You can of course add additional text files. (Refresn Node Definitions to update the node with new text file entries)
3. In ComfyUI, use the random_line_file dropdowns to select the files you want to draw from. Selecting "None" will skip that slot.
4. The node will pick one random line from each selected file and combine them with your prefix and postfix using the specified delimiter.
5. Alternatively, set use_static_prompt to "true" to bypass the random generation and use the text from the static_prompt input instead.

This node allows you to select a text prompt from a folder of .txt files, either randomly or by a specific index.
It's perfect for workflows where you want to iterate through a predefined list prompts.

1. This node uses the ComfyUI/custom_nodes/ComfyUI-Brekel/prompt_chooser/ folder, which is included with the installation.
2. Place your .txt files inside this folder. Each file should contain a single prompt.
   • Example: cat.txt could contain "A cat wearing a wizard hat".
   • Example: dog.txt could contain "A dog riding a skateboard".
   • Add as many of your own files and/or delete the example files as needed.
3. In ComfyUI, set the folder_path to this directory (it should be the default).
4. Choose your selection_mode:
   • Random: Uses the seed to pick a random file. A seed of 0 will be different each time.
   • Index: Picks a file based on its alphabetical order in the folder. The index will wrap around if it's larger than the number of files.

These nodes were created by Brekel.

• Website: https://brekel.com