ComfyUI - RE-CustomUtils

A collection of custom nodes for ComfyUI.

Note

This project was inspired by the cookiecutter template, though the full architecture is a bit different.

Quickstart

1. Install ComfyUI.
2. Install ComfyUI-Manager
3. Look up this extension in ComfyUI-Manager. If you are installing manually, clone this repository under ComfyUI/custom_nodes.
4. Restart ComfyUI.

---

Nodes

PromptPresetSelector

Inputs

• syntax (str), default to {% | %} — defines the opening tag, separator, and closing tag as a single field, space-separated
• preset_index (int), 0-based, default to 0 — loops both ways within range
• preset_name (combo) — dynamic dropdown, active when preset_names is filled
• preset_names (str), optional — comma-separated list of preset names. Ex: neutral, happy, sad. If fewer names than presets, remaining are auto-named (preset_2, preset_3...). If more, extra names are ignored.
• text (str), multiline textarea supporting preset blocks
• cleanup (bool), default to True

Outputs

• text (str) — the formatted text, with preset blocks resolved
• preset_index (int) — the selected index
• preset_count (int) — the number of presets found across blocks

Usage

Include preset blocks in your text using the syntax defined in the syntax field. Each block holds options separated by the separator. Depending on preset_index, the matching option is injected and the block markers are removed.

This is {% an example | a text | another text %} for {% the PromptPresetSelector | the README | %}

• preset_index = 0 → This is an example for the PromptPresetSelector
• preset_index = 1 → This is a text for the README
• preset_index = 2 → This is another text for

Empty presets are allowed — the block is simply replaced by an empty string.

Custom syntax

The syntax field allows changing the opening tag, separator and closing tag. Format is always open_tag separator close_tag, space-separated.

<< / >>

Would match blocks like << option_a / option_b >>.

Preset names

When preset_names is filled, preset_index is replaced by a dynamic dropdown (preset_name) built from the comma-separated names. The dropdown resets to the first preset when activated.

If fewer names than presets are defined, remaining entries are auto-named (preset_2, preset_3...). If more names than presets, extra names are ignored.

Preset references

Inside a preset, you can reference a previously declared preset using $N (0-based index).

{% base style | $0, hat | $1, jewelry %}

• preset_index = 0 → base style
• preset_index = 1 → base style, hat
• preset_index = 2 → base style, hat, jewelry

References are resolved recursively — $1 in preset 2 resolves preset 1, which may itself reference preset 0.

Rules:

• $N can only reference a preset with a lower index (forward references are not allowed)
• $N must be within range
• Circular references raise an error

Cleanup

When cleanup is enabled, the following are removed from the output:

• Spaces before commas
• Multiple consecutive spaces
• Empty or comma-only parentheses and brackets
• Residual commas after opening or before closing parentheses
• Double or empty commas
• Leading commas
• Empty lines

Validation

The node runs the following checks and stops the workflow on error:

• syntax must contain exactly 3 space-separated parts
• open_tag and close_tag must be different
• All preset blocks in text must have the same number of options
• preset_index must be within range

---

PromptOptionPicker

Inputs

• options (str) — one option per line. Empty lines are allowed and displayed as -- in the dropdown, with an empty string as value.
• selected (combo) — dynamic dropdown built from the options field.

Outputs

• value (str) — the selected option, or "" if -- is selected.

Usage

Fill the options field with one option per line. The dropdown updates automatically as you type.

sitting down
standing up
lying down

kneeling

The empty line above produces a -- entry in the dropdown, which outputs an empty string. If the field is empty, the dropdown resets to --.

Labels

Options can be labeled using the label $: value syntax. The label is shown in the dropdown, but the real value is transmitted on output:

neutral $: character, simple background
happy $: character, smile, laughing
sad $: character, crying

For unlabeled options, use $: value — the option is auto-named option_N:

$: character, simple background
$: character, smile

Cartesian product blocks

Use @combine / --- / @end blocks to generate all combinations of multiple lists:

@combine
from front
straight-on
from side
---
from above
from below
---
close-up
full body
@end

Each --- separates a new list. The block expands into all combinations joined by , :

from front, from above, close-up
from front, from above, full body
from front, from below, close-up
...

Multiple @combine blocks are allowed and processed independently. A --- outside a block is treated as a literal option.

Validation

The node stops the workflow on error if:

• A @combine block is opened inside another
• A @end is found without a matching @combine
• A @combine block is never closed

---

PromptLayoutFiller

Inputs

• template (str) — multiline text with placeholders. Supports {N} or {N:label} syntax where N is the slot index (0-based) and label is a purely visual annotation.
• cleanup (bool), default True
• slot_0 to slot_9 (str, connectable) — values injected into the corresponding placeholders. Slots are revealed one by one as the previous one is connected. Up to 10 slots supported.

Outputs

• text (str) — the template with all placeholders resolved.

Usage

Write a template in the text field using placeholders:

character, {0:position}, {1:background}, {2:lighting}

Connect a node (e.g. a PromptOptionPicker) to each slot. The placeholder is replaced by the connected value at execution.

Cleanup

Same rules as PromptPresetSelector. Useful when a connected slot outputs an empty string, leaving residual commas or parentheses.

Validation

The node stops the workflow on error if:

• The template is empty
• A placeholder index exceeds the maximum slot index (9)
• A placeholder is used but the corresponding slot is not connected

Typical workflow

[PromptOptionPicker] → slot_0 ┐
[PromptOptionPicker] → slot_1 ├→ [PromptLayoutFiller] → text
[PromptOptionPicker] → slot_2 ┘

Each PromptOptionPicker manages its own list of options independently. Slot lengths do not need to match.

---

PromptSwitch

Inputs

• on_true (str) — value returned when condition is True. Accepts direct input or connected node.
• on_false (str) — value returned when condition is False. Accepts direct input or connected node.
• condition (bool), default True — controls which input is routed to the output.

Outputs

• text (str) — the selected value based on condition.

Usage

Connect or type a value in on_true and on_false. Toggle condition to switch between them.

If the node is bypassed, an empty string is returned.

Editor

Input ports and widget borders are colored based on the active condition:

• Orange: active input when condition is True
• Blue: active input when condition is False
• Gray: inactive input Colors are only shown when an input is connected or has a value.

---

PromptRouter

Inputs

• selected (str, internal) — stores the active selection for workflow persistence.
• _sub_selected (str, internal) — stores the active sub-router selection.
• input_0 to input_9 (str, connectable) — values to route. Slots are revealed one by one as the previous one is connected. Up to 10 slots supported.

Outputs

• text (str) — value of the selected input.
• index (int) — index of the selected input.

Usage

Connect nodes to the input slots. The dropdown automatically populates with the title of each connected source node, prefixed by its index:

0: position
1: background
2: lighting

Select the active input from the dropdown. The node outputs the value of the selected input.

If a connected node is bypassed, the output is an empty string.

Sub-router

If a connected source node is itself a PromptRouter, it is marked with a ▶ indicator in the dropdown:

0: position
1: Router B ▶
2: background

Selecting it reveals a second dropdown populated with the options of the child router. The parent outputs the value selected in the child dropdown.

Changing the selection in either the parent sub-dropdown or the child router updates both in sync. Multiple parents connected to the same child router all stay synchronized.

Sub-routing is limited to one level deep.

Editor

• The dropdown updates automatically when source nodes are connected, disconnected, or renamed.
• The active selection is preserved across workflow saves, reloads, and undo/redo.

Known limitations

• If a child router's connections change while it is selected in the parent, the parent dropdown may not update immediately. Reconnecting or modifying the parent will trigger a refresh.
• If a getter node is connected to the router, the getter's name will be in the router's dropdown but, the getter being "invisible" (directly getting the setter's value), the value would be provided by the node before the setter. Thus, the router would receive an empty string, because of not getting the right node. Linking the getter with a string node before connecting to the router solves the issue.

---

QuickCombo

Inputs

• options (str) — comma-separated list of options typed inline. Ex: neutral, happy, sad
• selected (combo) — dynamic dropdown built from the options field
• one_based (bool), default False — if True, the index output starts at 1 instead of 0

Outputs

• value (str) — selected option
• index (int) — index of the selected option (0-based by default)

Usage

Type a comma-separated list in the options field. The dropdown updates automatically as you type.

neutral, happy, sad, angry

Toggle one_based to match the indexing convention of other nodes in your workflow.

Differences from PromptOptionPicker

	QuickCombo	PromptOptionPicker
Input format	Inline comma-separated	Multiline, one per line
@combine blocks	No	Yes
Labels ($:)	No	Yes
Empty options	No	Yes (--)
Use case	Quick setup	Advanced lists

---

StyleLoader

Inputs

• style_file (combo) — dropdown listing all .json files found recursively under the styles/ folder. Supports subfolders (e.g. anime/illustrious.json).
• checkpoint (combo) — model checkpoint to load.
• vae (combo) — VAE override. Select none to use the checkpoint's built-in VAE.
• clip_skip (int), default -2 — number of CLIP layers to skip. Set to -1 to disable.
• quality_tags (str) — positive quality prompt, passed through as a string output.
• negative_tags (str) — negative quality prompt, passed through as a string output.
• steps (int), default 15 — number of sampling steps.
• refiner_step (int), default 24 — step at which a refiner pass begins, if used.
• cfg (float), default 4.0 — classifier-free guidance scale.
• sampler (combo) — sampler name, sourced from ComfyUI's own sampler list.
• scheduler (combo) — scheduler name, sourced from ComfyUI's own scheduler list.
• loras_data (str, internal) — serialized LoRA list for workflow persistence.

Outputs

• model — loaded model with LoRAs applied.
• clip — CLIP encoder with clip skip and LoRAs applied.
• vae — VAE (overridden or from checkpoint).
• quality_tags (str) — positive prompt passthrough.
• negative_tags (str) — negative prompt passthrough.
• steps (int)
• refiner_step (int)
• cfg (float)
• sampler (str)
• scheduler (str)

Usage

Style files are .json files stored under the styles/ folder at the root of the extension. Subfolders are supported and reflected in the dropdown after a page refresh.

A style file contains all parameters for a generation setup:

{
  "checkpoint": "model.safetensors",
  "vae": "none",
  "clip_skip": -2,
  "loras": [
    { "name": "lora.safetensors", "weight": 0.8 }
  ],
  "quality_tags": "masterpiece, best quality",
  "negative_tags": "worst quality, low quality",
  "steps": 15,
  "refiner_step": 24,
  "cfg": 4.0,
  "sampler": "euler_ancestral",
  "scheduler": "karras"
}

LoRAs support a single weight (applied to both model and clip), or separate model_weight and clip_weight.

Editor

The node includes a built-in styled editor:

• All fields are native ComfyUI widgets — checkpoints, VAE and samplers have built-in search and autocomplete.
• LoRA rows are displayed as canvas widgets, one per line, with a name picker, weight control, and remove button.
• The weight can be adjusted by dragging horizontally, clicking the ◀ / ▶ arrows, or clicking the value to type it directly.
• Clicking the LoRA name opens a searchable dropdown.

Actions

Button	Action
➕ New	Creates a new style file from a blank template
💾 Save	Saves current widget values to the selected style file
📋 Clone	Saves current values to a new file
🗑️ Delete	Deletes the selected style file (requires confirmation)

Adding a new style file or refreshing an existing one takes effect immediately without restarting ComfyUI. Adding new files to the styles/ folder externally requires a page refresh (F5) to appear in the dropdown.

---

Web

contentEditable editor

Some text widgets are replaced by a contentEditable div that provides syntax highlighting. Supported widgets and nodes:

• text widget in PromptPresetSelector
• options widget in PromptOptionPicker
• template widget in PromptLayoutFiller

Colors update in real time while editing or changing other widget's values and pasting always inserts plain text, stripping any HTML formatting.

PromptPresetSelector:

• Orange: tags and separators
• Gray: inactive presets
• Blue: $N references on the active preset

PromptOptionPicker:

• Orange: @combine / --- / @end tags
• Cyan: labels
• Gray: $: separators

PromptLayoutFiller:

Placeholders are highlighted in the editor:

• Green: slot is connected
• Red: slot is referenced but not connected

Keyboard shortcuts

Shortcut	Action
Ctrl+Up	Increase weight of selected text or word under caret by 0.1. Ex: tag → (tag:1.1)
Ctrl+Down	Decrease weight of selected text or word under caret by 0.1. Ex: (tag:1.1) → tag when reaching 1.0

The selection is preserved after each keypress, consistent with ComfyUI native behavior.

---

Tests

This project uses pytestand pytest-aiohtttp for its tests, and uv for the versioning. After downloading uv, just run:

uv sync --dev
.venv\Scripts\activate.bat    # Windows
source .venv/bin/activate     # Linux/MacOS

and you should have the dependencies ready.

Then, to run the tests:

uv run pytest

---

TODO

PromptPresetSelector

• Add a field to easily concatenate text at the end of the output
• Wildcard mode for presets (randomly selected, index to -1 or -2?)

PromptRouter

• Add support for more sub-routing levels?

StyleLoader

• LoRA toggle on/off per row
• Separate model/clip weight per LoRA on UI
• Better LoRA row style