EmAySee Save Text to File

ComfyUI will happily generate a thousand captions or prompts, but nothing core will write them to disk as plain text. This node fixes that: take any STRING, give it a filename, and it writes a .txt file - either into ComfyUI's output folder (with subfolder support) or to an absolute path if you hand it one. It's the companion every LLM/captioning workflow ends up needing.

How it works

Three inputs, all required:

text_to_save (multiline) - the string that becomes the file's contents.
filename (default output_text) - the base name. Don't worry about the extension; .txt is added for you, and if you type notes.txt it strips the .txt and re-adds it.
subfolder (default empty) - a subfolder under ComfyUI's output directory.

The path logic is the useful part: if filename is an absolute path it writes there directly; if subfolder starts with / or looks like a drive path (the C: check), it treats that as the directory; otherwise it joins output_dir + subfolder + filename. It creates directories as needed and sanitizes the filename (drops characters that aren't alphanumeric, space, dot, underscore, or dash), so a filename with slashes or weird symbols won't crash it - it just gets scrubbed.

No outputs; it's an output node.

Gotchas

It overwrites. Same filename + same folder = previous file replaced. No counter. If you're logging per-run data, wire a timestamp or a seed into the filename or you'll only ever keep the last run.
Sanitization is silent. A filename you think is fine can come out scrubbed (e.g., emoji or : in the name get stripped). If you find files with slightly different names than you typed, that's why.
The output_text default is a trap in a long batch - fifty runs all write to output_text.txt and only the last survives. Rename per run.

Where it fits

Saving LLM-generated prompts and captions for later reuse, dumping prompt-batch logs for comparison, or feeding a caption file into a training pipeline. It's the string counterpart to the pack's save-image nodes, and it's the sort of "why is this not built in" utility that keeps getting rebuilt - this one comes free with the pack.

Installing it

Part of ComfyUI_EmAySee_CustomNodes. ComfyUI Manager → search the pack title → Install, or:

cd ComfyUI/custom_nodes
git clone https://github.com/EmAySee/ComfyUI_EmAySee_CustomNodes
# restart ComfyUI

Under EmAySee/Utils, no dependencies.

Bottom line

Text in, .txt out, with subfolders and absolute paths handled. Give it unique filenames and it'll never fight you - forget to, and it'll overwrite you into confusion.