Multiline Concatenate (Soze)

The plain job here: take up to ten separate blocks of text and glue them into one string, with whatever separator you choose sitting between them. The obvious reason to want this - building a prompt out of pieces that live in different parts of your graph. A fixed quality boilerplate block, a subject line coming out of a Load Random Line From Text File, a style tag from a dropdown elsewhere - instead of hand-wiring string concatenation logic, you drop them all into one node.

How it works

string1 is required; string2 through string10 are optional slots you fill as needed - leave the rest blank. separator sits between each filled block; it defaults to an empty string, so with nothing set you get a straight concatenation with no spacing added. Since each multiline block can already carry its own trailing newline or spacing, that often reads fine as-is - but if you want clean joins, set separator to something like ", " or a newline.

The inputs and output that matter

• string1 (required) through string10 (optional), all multiline - your text blocks.
• separator - inserted between each block you've filled in.

Output is STRING - the joined text, ready for a CLIPTextEncode or further processing.

A typical layout: string1 is a fixed "quality" boilerplate block you never touch, string2 is the actual subject text coming from wherever you're driving prompts (a Load Random Line From Text File, a folder loader, a manual widget), string3 is a negative-space style tag, and separator set to ", " keeps them reading as one comma-separated prompt instead of a run-on block of text. The value over typing it all into one text box by hand is that each piece can now be swapped independently by whatever's upstream of it - change the subject source without touching your quality boilerplate.

Installing it

ComfyUI Manager: search ComfyUI_Soze. Manual: cd ComfyUI/custom_nodes && git clone https://github.com/SozeInc/ComfyUI_Soze.git, pip install -r ComfyUI_Soze/requirements.txt, restart. No models, no dependencies beyond the pack - it's string handling.

Common issues

Ten slots is generous, but if you genuinely need more, chain two of these together: wire the STRING output of one into string1 of a second. That's a clean pattern here since blank optional slots are simply skipped rather than inserting stray separators for empty entries.

This pairs naturally with the rest of the pack's string tools - clean the joined result with Special Character Replacer before it becomes a filename, or run it through Multi Find And Replace first to swap out placeholder tokens in any of the individual blocks before they're glued together.