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: [email protected]

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Support

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