ComfyUI-MacroNodes

Macro Nodes

Quality-of-life nodes for ComfyUI. Small, dependency-free, and each one solves a thing that was annoying enough to fix properly.

Registry: macronodes · Publisher: the-macroman · MIT

Install

ComfyUI Manager - search for Macro Nodes.

CLI

comfy node install macronodes

Manually

cd ComfyUI/custom_nodes
git clone https://github.com/the-Macro-Man/ComfyUI-MacroNodes

Restart ComfyUI. There is nothing to pip install - the pack uses only the Python standard library.

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Nodes

Model Name Extractor

Names your saved files after the model that made them. Switch checkpoints and the filename follows, with nothing to retype.

Load Checkpoint ──MODEL──> Model Name Extractor ──STRING──> SaveImage.filename_prefix

filename_prefix is a widget by default. Right-click the SaveImage node and choose Convert widget to input before you can connect to it. This is the one step everybody gets stuck on.

Found under MacroNodes/utils.

Inputs

| Input | Default | What it does | |---|---|---| | model | - | Connect any MODEL output | | prefix | "" | Text put in front of the name, e.g. Draft_ | | create_folder | off | On: saves into a subfolder named after the model | | model_name | "" | Type a name here to override auto-detection |

Results

With sd_xl_base_1.0.safetensors loaded:

| Settings | Output file | |---|---| | defaults | sd_xl_base_1.0_00001.png | | prefix = Draft_ | Draft_sd_xl_base_1.0_00001.png | | create_folder = on | sd_xl_base_1.0/sd_xl_base_1.0_00001.png | | both | sd_xl_base_1.0/Draft_sd_xl_base_1.0_00001.png |

Folders are created if absent and reused if present.

How it finds the name

It walks the workflow graph backwards from its own MODEL input until it hits a node carrying a filename widget - ckpt_name, unet_name, model_name, model_path, gguf_name or name. That covers Load Checkpoint, Load Diffusion Model, UNETLoader, the GGUF loaders and most custom loaders, without needing to know about any of them individually.

If the walk finds nothing it inspects the model object itself, and failing that returns unknown_model rather than raising.

Names are sanitised for both Windows and Linux: < > : " / \ | ? * and control characters become underscores, trailing dots and spaces are stripped, and Windows reserved device names (CON, PRN, COM1…) get an underscore prefix. The Windows rules are applied on every platform so filenames stay portable.

IS_CHANGED returns NaN, so the node re-evaluates every run and a checkpoint swap shows up immediately.

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Adding to this pack

Nodes live one per module in nodes/. To add one:

1. Create nodes/your_node.py defining NODE_CLASS_MAPPINGS and NODE_DISPLAY_NAME_MAPPINGS.
2. Import it in nodes/__init__.py and append it to MODULES.

The root __init__.py merges everything and warns on duplicate node ids rather than letting one quietly overwrite another. Imports are explicit rather than discovered at runtime, so the full node list is readable from one file.

What this package does not do

No network calls. No eval, exec, subprocess, os.system, pickle or __import__. No dependencies beyond the standard library. The only import in the whole package is os.

Licence

MIT - see LICENSE.