all

The all node answers one question: is every element in this LIST truthy? Feed it a list, get back a single True or False. It's the "AND over a whole list" operation - the batch version of chaining a dozen boolean and nodes together, minus the spaghetti.

How it works

Under the hood it's literally Python's built-in all():

return (all(list),)

An element counts as "true" if it's truthy in the Python sense - non-zero numbers, non-empty strings, actual True values. Anything that's 0, "", None, False, or an empty collection is falsy and makes the whole result False.

The one behavior that trips people up: an empty list returns True. That's the standard Python semantics - "all zero of these things are true" is vacuously true - and it's exactly what the node's own description warns about. If you feed in an empty list expecting False, you'll get True and your conditional routing will silently flip. The sibling any node has the opposite behavior, so it's easy to reach for the wrong one.

Where you'd use it

• Validation gates. Check that every item in a batch passed some test, then only proceed if all returns True.
• Batch conditionals. Build a LIST of booleans (say with create LIST from BOOLEANs) where each boolean is "this frame passed the NSFW filter," then all gives you "the whole batch is clean."
• Early-abort logic. Combined with the pack's if/else or disable flow nodes, all is the clean way to say "if everything is ready, run; otherwise stop."

Installing

Part of the "Basic data handling" pack by StableLlama. ComfyUI Manager: search "Basic data handling", install, restart. Or:

cd ComfyUI/custom_nodes
git clone https://github.com/StableLlama/ComfyUI-basic_data_handling

Restart and you're done. No extra dependencies, no model files - the pack is pure Python wrappers around built-ins, so this install is about as safe as custom-node installs get.

Gotchas worth knowing

• Empty list → True. If that surprises you, guard it with a ListLength check first.
• This works on a LIST (the pack's single Python-list variable), not a native ComfyUI data list. If you're holding a native data list, convert it to a LIST first before wiring it in.
• Truthiness can bite: the string "0" is truthy even though the number 0 isn't. If you're testing values that could be either, be deliberate about what you put in the list.