ComfyUI-DynamicPromptComposer

A ComfyUI custom node for building varied prompts across batch image or video generations. Split your prompt into independent sections, fill each with multiple options, and let each section pick one per run — via random, seeded-random, increment, or fixed mode. All chosen pieces are joined into a clean single-line output string ready to wire into any text encoder.

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Installation

Manual

cd ComfyUI/custom_nodes
git clone https://github.com/Alatza/ComfyUI-DynamicPromptComposer

Restart ComfyUI. The node will appear under the prompt category.

ComfyUI Manager

Search for Dynamic Prompt Composer in the Manager and install from there.

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Usage

Add the Dynamic Prompt Composer node to your workflow and connect its prompt output to a text encoder or any STRING input.

Sections

Each section represents one independent part of your prompt (subject, style, lighting, mood, etc.). Use the Add Section / Remove Section buttons to manage sections — up to 10 can be active at once.

Within a section, list your options separated by newlines or pipes (|):

a sunny day
a rainy night | a foggy morning

Modes

Each section has its own mode:

| Mode | Behavior | |------|----------| | random | Picks one element at true random. Non-reproducible every run — the seed input is ignored. | | random (seed) | Picks one element at random using seed as the RNG seed. Same seed always produces the same pick. | | increment | Cycles through elements in order across runs. Resets at the start of each new batch. | | fixed | Always picks the element at the start index. |

random vs random (seed) — Use random when you want a different result every single run with no way to reproduce it. Use random (seed) when you want to explore combinations by changing the seed, but need to be able to go back to a specific result — same seed always yields the same prompt.

Seed

Used by random mode to seed the RNG. Changing the seed changes which elements are picked. Has no effect on increment or fixed sections.

Start Index

Shared by fixed mode (which element to pin) and increment mode (which element to begin from at the start of each batch). Defaults to 0.

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Compatibility

• ComfyUI (latest)
• Python 3.10+

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License

MIT