Selector de Prompts

You know the workflow: you have three or four prompt variants - a positive, a backup, a style variation - and you keep swapping which one is wired in. This node is the clean way to manage that. Twelve multiline prompt slots, each with its own on/off switch, and one text output that either passes a single prompt through or joins several together. Same idea as the pack's image selector, but for strings, and it costs nothing - no API, no keys, pure text handling.

The typical use: keep all your prompt experiments in the graph, toggle exactly one on, and never rewire a wire again. Flip from "portrait of a knight" to "portrait of a knight, golden hour" by clicking a switch instead of editing and risking a typo.

The modes and joins

• auto - one active prompt passes through; multiple active prompts get joined.
• single_only - errors if more than one slot is on, so you can't accidentally batch.
• join_only - well, joining is the point of multi; it forces the join path.

When multiple prompts are active, join_with controls the glue: \n\n (default), \n, |, or , . This matters more than it looks - joining with commas makes a single run-on prompt; joining with a blank line keeps them as separate prompt paragraphs, which behaves differently in the text encoder. For SDXL/Flux-style prompt blocks, \n\n is usually the right call.

fallback decides what happens if every slot is off or empty: raise, or fall back to slot 1.

The inputs that matter

• on1 … on12 - the toggles.
• p1 … p12 - the prompts themselves, all multiline. Empty slots are skipped automatically.
• join_with / mode / fallback - the behavior knobs above.

Output: a single text STRING, ready for a CLIP text encoder or whatever consumes prompts.

Installing it

ComfyUI Manager → search "COMFYUI_PROMPTMODELS" → install → restart, or:

cd ComfyUI/custom_nodes
git clone https://github.com/cdanielp/COMFYUI_PROMPTMODELS

No API key. ComfyUI >= 0.26.0.

The honest take

It's a simple node with two gotchas. First, empty slots are silently skipped - if you meant to include an empty prompt as a "blank" test, it just won't appear, and the join happens without it. Second, the \n\n default means the output literally contains blank lines; if you pipe it into a node that trims whitespace aggressively, your structure can collapse. And the usual workflow-state warning applies: switches are saved with the workflow, so an old toggle you forgot about determines what runs. One tip: name your slots with the switches and you get a mini prompt library that's self-documenting in the graph.