Petty Paint Ensure Directory

Every ComfyUI regular has hit it: the workflow ran fine yesterday, today the save node fails because some folder got cleaned up or never existed. PettyPaintEnsureDirectory is the guard for that. Give it a path and it creates the directory if it's missing - os.makedirs(path, exist_ok=True) - then hands the same path back, untouched. Nothing else happens. It's the filesystem equivalent of a seatbelt: you notice it exactly when it does its job and you'd have crashed without it.

It's a genuinely community-requested thing, too. In a r/comfyui thread titled "Is there a node to ensure a given directory exists?", the asker's save-text node kept failing when they forgot to pre-create the output folder - and their resolution was literally this node: "I found one. It is called 'Petty Paint Ensure Directory' and works fine." That's the real-world niche: a one-line utility that saves you from folder-missing failures in batch and pipeline work.

How it works

Feed it any path string; it creates the directory (and any missing parents, thanks to makedirs with exist_ok=True), so C:/runs/out/subfolder gets the whole chain created in one shot. If the folder already exists it's a no-op. The pass-through behavior is the key design choice: because it returns value unchanged, you can wire it inline in a chain - path node → EnsureDirectory → whatever consumes the path - and it costs you nothing on the happy path.

The inputs and outputs

• value - any type (*), practically a directory path string.
• Output: data (*) - the same value, unchanged.

Installing it

It's in the petty-paint pack:

cd ComfyUI/custom_nodes
git clone https://github.com/mephisto83/petty-paint-comfyui-node

Restart ComfyUI, or install via ComfyUI Manager searching "petty-paint-comfyui-node". Declared dependency: Flask==2.1.2, unused here.

Common issues

The one thing to remember: it creates directories on your filesystem, not inside ComfyUI's sandboxed output convention. If you hand it a path outside what you expected, it will create that too - permissions permitting - and silently. That's powerful and a little dangerous; keep paths explicit and predictable. The node also swallows errors: if creation fails (bad permission, illegal path), it prints to the console and returns the value anyway, so a failure doesn't break the graph - which means a save node downstream can still fail afterward. Check the console if things are weird. But for the "I keep forgetting the folder" problem, it's exactly right.