String Appender (Suffix)

Sometimes you don't want to hand-edit a prompt - you want to append to one coming from somewhere else. String Appender (Suffix) is the node for that: it takes an input string, a separator, and a fixed suffix, and returns the joined result. That's it, and that's exactly what you need when the same trailing tags should land on every prompt in a batch.

Inputs

• input_text - a string input from another node (it's marked forceInput, so you can't accidentally convert it into a widget - it wants a wire).
• separator - what goes between the two parts. Default is a single space. If you type \n as the literal two characters, it becomes a real newline.
• text_to_append - the suffix.

Output: a single STRING.

Where it fits

• Batch prompting: run your base prompts through String Splitter, append a shared quality suffix to each, and re-feed. Since the appender is a single-string node, ComfyUI iterates it over the list for you.
• LoRA trigger phrases that live at the end of a prompt (some trigger words are written to be trailing).
• Adding camera or lighting tags to a prompt that arrives from another node or a file.

Gotchas

Note the default separator difference between the two siblings in this pack: the Appender defaults to a space ( ), while the Prepender defaults to , . If you're building symmetric workflows, set them deliberately or you'll get "dogphotorealistic" instead of "dog photorealistic".

Also worth remembering: it's one input string in, one string out. If you're appending the same suffix to many prompts, either put the splitter upstream (ComfyUI handles the fan-out) or reach for the splitter-based pattern.

Installing this node

One of the 16 nodes in the lzits Nodes pack (Lior Zitser, MIT). Install via ComfyUI Manager (search "lzits Nodes") or:

cd ComfyUI/custom_nodes
git clone https://github.com/lzitser23/lzits-nodes.git

Restart ComfyUI. No dependencies.