ComfyUI Simple Prompt

A focused ComfyUI custom node for writing positive and negative prompts as strings and keeping a permanent, searchable prompt library.

Simple Prompt was originally extracted from the Simple Prompt work in PG-Nodes. It has since become an independent project with its own storage, cross-tab synchronization, history interface, search behavior, and variation grouping. This package intentionally contains only this prompt node, not the other PG-Nodes nodes.

Node

Simple Prompt (Standalone)

Inputs:

• Positive prompt
• Negative prompt

Outputs:

• Positive prompt as a STRING
• Negative prompt as a STRING

Prompts are saved only after the node runs as part of a workflow. Merely typing or editing text does not create history entries.

Prompt Library

• Keeps every executed prompt without a configured history limit.
• Shares one package-local history database across nodes and browser tabs.
• Refreshes open History panels when the database changes.
• Searches positive prompts, negative prompts, and custom entry names.
• Supports quoted phrases and -excluded search terms.
• Tracks exact reuse counts and last-used times.
• Stores each exact prompt variation separately.
• Groups consecutive prompt experiments into expandable variation groups.
• Starts a new variation lineage after New Prompt or a substantial prompt replacement.
• Allows a grouped variation to be removed from its group without deleting it.

Storage

History is stored at:

ComfyUI-Simple-Prompt/data/prompt_history.json

Writes are atomic and maintain a recovery copy at:

ComfyUI-Simple-Prompt/data/prompt_history.json.bak

The database belongs to this standalone package. It does not continuously import from PG-Nodes or expose a configurable history path, avoiding split databases and stale path settings.

Installation

Place this repository in ComfyUI's custom_nodes directory:

ComfyUI/custom_nodes/ComfyUI-Simple-Prompt

Restart ComfyUI, then add Simple Prompt (Standalone) from the Simple Prompt category.

Origin

The original node and History interface were derived from PG-Nodes. The standalone project exists because the prompt-only workflow evolved into a distinct single-node tool focused on reliable prompt history and reuse.

License

MIT