Save Text File (TJ)

Sometimes you don't want a prompt in the workflow - you want it on disk, right now, next to the images it generated. Save Text File (TJ) writes a string to a file and passes the same string straight through its output, so you can drop it in the middle of a chain as a logger without breaking the flow. It's the node for "save the prompt that made this" without fighting ComfyUI's metadata embedding or manually copy-pasting.

How it works

Give it text, it writes it. The inputs control exactly where and how:

• text - the string to save (prompt, seed list, whatever). It can also be fed wirelessly via get_name.
• path - destination, default image/%date (a date-named folder under output). %date expands to today.
• filename_prefix - the base name (default image).
• filename_delimiter - separates prefix, number, and suffix (default _).
• filename_number_padding - digit padding on the auto-increment (default 4, so image_0001.txt).
• filename_suffix - an optional extra suffix.
• file_extension - default .txt; change to .json, .md, whatever.
• encoding - the one that betrays the author's Korean roots: utf-8, utf-8-sig, cp949, euc-kr, ascii. On Windows, cp949/euc-kr matter for Korean filenames/content; everyone else mostly wants utf-8.

Output: text - the exact string you put in, passed through unchanged. So you can log a prompt to file and keep feeding it downstream in the same wire.

There's also setnode_name for publishing the text to the TJ wireless registry, making it usable as a wireless sender as well as a file writer.

Installing it

Standard pack install:

cd ComfyUI/custom_nodes
git clone https://github.com/designloves2/ComfyUI-TJ_NODE

or ComfyUI Manager → ComfyUI-TJ_NODE → restart. No dependencies beyond the pack.

The honest take

It's a utility node and it knows it. The pass-through output is the design detail worth noticing - most "save text" nodes dead-end the flow, but this one lets you log and continue in the same breath. The best pattern is pairing it with the save pipeline: run a Save Image (Primary-TJ) for the picture and a Save Text File with the same prefix for the prompt, and you get main.png + main.txt side by side, everything reproducible without digging into metadata. One practical note: the filename fields are separate widgets, so if you want main_prompt.txt matching a main_0001.png, mirror the prefix and let the padding do the rest. Encoding only becomes your problem if you're writing non-ASCII text on Windows - then utf-8-sig is the safer default than plain utf-8.