Universal Input Hub by Steve Lasmin

An all-in-one ComfyUI workflow node that replaces multiple standard nodes with a single powerful hub. Calculates image dimensions, generates noise, computes sigmas (standard and Flux-optimized), encodes conditioning, and provides sampler objects — all in one place.

Author: Steve Lasmin
Support: https://boosty.to/stevelasmin

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What It Does

Instead of wiring together Empty Latent Image, CLIP Text Encode, KSampler selector, noise generator, and sigma scheduler nodes, this single node handles everything.

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Inputs (15)

Resolution & Aspect

Input	Type	Default	Range	Description
max_size	INT	1024	32–4096 (step 32)	Longest side of the output image in pixels
aspect_ratio	preset	custom	11 presets + custom	Choose 1:1, 3:2, 4:3, 16:9, 16:10, 21:9, 2:3, 3:4, 9:16, 9:21, or custom
width_ratio	INT	2	1–999999	Custom width component (only when aspect_ratio = custom)
height_ratio	INT	3	1–999999	Custom height component (only when aspect_ratio = custom)
multiplier	dropdown	32	16 / 32 / 64	Ensures output dimensions are divisible by this value

Generation Parameters

Input	Type	Default	Range	Description
seed	INT	777	0–max uint64	Random seed for noise generation
steps	INT	20	1–10000	Number of sampling steps
cfg	FLOAT	4.0	0.0–100.0 (step 0.1)	Classifier-Free Guidance scale
sampler	dropdown	euler	All ComfyUI samplers	Sampling algorithm (euler, dpmpp_2m, etc.)
scheduler	dropdown	normal	All ComfyUI schedulers	Noise schedule (normal, simple, karras, etc.)

Model & Prompts

Input	Type	Description
model	MODEL	Diffusion model input
clip	CLIP	CLIP text encoder input
prompt	STRING (multiline)	Main positive text prompt
trigger_words	STRING	Words auto-prepended to prompt with ". " separator
negative_prompt	STRING (multiline)	Text to exclude from generation

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Outputs (20)

Output	Type	Description
width	INT	Calculated image width in pixels
height	INT	Calculated image height in pixels
preview	STRING	Human-readable summary of all settings
seed	INT	Seed value passthrough
noise	NOISE	Noise object for SamplerCustomAdvanced
steps	INT	Steps passthrough
cfg	FLOAT	CFG passthrough
sampler_name	STRING	Sampler name as string
sampler	SAMPLER	Sampler object for advanced samplers
scheduler_name	STRING	Scheduler name as string
sigmas	SIGMAS	Standard sigmas from model + scheduler + steps
flux_sigmas	SIGMAS	Flux-2 optimized sigmas (dimension-aware, no model needed)
model	MODEL	Model passthrough
prompt	STRING	Original prompt text
prompt_with_triggers	STRING	Prompt with trigger words prepended
negative_prompt	STRING	Negative prompt text
trigger_words	STRING	Cleaned trigger words (as entered, stripped)
positive	CONDITIONING	Positive conditioning tensor
negative	CONDITIONING	Negative conditioning tensor
help	STRING	Full in-node documentation

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Key Features

• 19 outputs — everything a sampler needs in one node
• Flux-2 sigma schedule — computed from actual output dimensions using time-SNR shift
• Trigger words — automatically prepended with proper ". " separator
• Tooltips on every input — hover for guidance
• Clean docstring — no garbled mixed text
• Consistent rounding — width/height calculated once and reused throughout

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Installation

1. Navigate to your ComfyUI/custom_nodes/ directory
2. Clone this repository:

   git clone https://github.com/Eklipsis/universal_input_hub_by_steve_lasmin.git
   

3. Restart ComfyUI

The node appears under utils → Universal Input Hub by Steve Lasmin.

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Example Workflow

1. Load Checkpoint → connect MODEL and CLIP to this node
2. Set max_size to 1024, aspect_ratio to 16:9, multiplier to 32
3. Type your prompt and optional trigger_words
4. Connect outputs to SamplerCustomAdvanced or standard KSampler

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File Structure

universal_input_hub_by_steve_lasmin/
├── __init__.py
├── nodes.py
├── README.md
├── LICENSE
├── .gitignore
└── pyproject.toml

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License

This project is licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License.

• ✅ Free to use (personal and commercial)
• ✅ Free to share
• ❌ Modifications and derivative works are not allowed without permission

See LICENSE for full terms.

To request permission for modifications, contact: real.eclipse@gmail.com

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Support

If you find this node useful, consider supporting the author:
https://boosty.to/stevelasmin