Merge Strings v2

Merge Strings v2 is the stricter sibling of the pack's plain Merge Strings. Same idea - join text inputs into one string with a delimiter - but where the original accepts five anything inputs and silently skips whatever isn't a string, this one declares its five inputs as STRING type and marks them forceInput, which means every slot expects a text wire, explicitly.

So the real difference between the two versions is a philosophy difference, and it's worth picking a side. The original is forgiving: plug in a mix of stuff, get text out, non-strings quietly ignored. The v2 is honest: if a slot is meant to be a string, you connect a string, and the type system enforces it for you. If you're building a workflow you'll share, the typed version catches mistakes at wiring time instead of letting a wrong connection produce a subtly wrong prompt at the other end. If you're slapping a quick assembly together, the original's tolerance is nicer.

Either way, the joining logic is identical and it's the good kind: only non-empty strings are joined, empty slots don't leave stray delimiters, and the delimiter defaults to ", " for prompt-style assembly. Set it to "\n" and the node treats it as a literal newline, which turns it into a mini multi-line caption builder.

Inputs and outputs

• string_1 through string_5 (STRING, optional, forceInput) - five text inputs that must be wired, not typed.
• Delimiter (STRING, default ", ") - the joiner between parts.
• Output string (STRING) - the merged result, ready for a CLIP Text Encode or a text display node.

Joining happens in slot order (string_1 through string_5), which on this 5-slot version is exactly what you'd expect.

Installing it

Ships in ComfyUI-RvTools_v2:

cd ComfyUI/custom_nodes
git clone https://github.com/r-vage/ComfyUI-RvTools_v2

Restart ComfyUI or install via ComfyUI Manager (search "RvTools"). No model downloads; dependencies are the standard torch/numpy/Pillow plus opencv-python, pilgram, pynvml, piexif.

Gotchas

The pack's README says it's no longer maintained, superseded by ComfyUI_Eclipse (same author). Still works.

The trap is the forceInput design: you can't double-click and type into these slots - every one of them expects a connected wire, including an empty-string source if you want to intentionally skip a slot. That's the price of the type-safety, and for most people it's worth it. And if you need more than five inputs, the v2 "Large" version has ten - just be aware that one sorts its slots lexicographically, so string_10 gets joined before string_2.