Channel selector for 128 channels

This is the biggest, most absurd-looking node in the pack: one hundred and twenty-eight boolean toggles, channel_0 through channel_127, all on by default, collapsing into a single CHANS output. Channel selector for 128 channels exists for models whose noise predictions are 128 latent channels wide - a genuine case for some of the wider latent formats, even if it makes for a comical wall of checkboxes on your canvas.

Mechanically it's identical to every other selector in this pack. It does no math and no model patching; it emits a boolean list describing which channels are "active," and the only consumer that matters is the channels_selection optional input on Pre CFG automatic scale. Wire the CHANS output in there and the auto-scale node measures and normalizes only the channels you've left on - which lets you exclude a specific channel from the automatic CFG logic when you've pinned it as the source of a color cast or artifact.

Here's the honest advice: you almost never want to flip through 128 toggles. If you're on SDXL or SD 1.5 - four latent channels - this node is overkill and your selector is the 4-channel version. And even on a genuinely wide-latent model, the pack gives you a far better tool for the common case: Individual channel selector, which targets a single channel with three numeric inputs (selected_channel, total_channels, exclude) instead of a wall of switches. The 128-toggle node's real niche is when you want to explicitly allow almost everything and exclude a handful - and at that point you're still scrolling a long way.

All the selectors share a base class, so the output type is the same everywhere and the behavior doesn't change with size. The one rule stays: match the selector's channel count to your model's actual latent width. The CHANS list won't validate itself against the consumer, so a mismatch just means the list doesn't line up with the prediction channels.

Installation is the pack standard, nothing special here:

cd ComfyUI/custom_nodes
git clone https://github.com/Extraltodeus/pre_cfg_comfy_nodes_for_ComfyUI

or grab pre_cfg_comfy_nodes_for_ComfyUI from ComfyUI Manager and restart. No models, no extra dependencies.

A node for a specific niche, best used when you genuinely have a 128-channel latent and you want the whole grid. For everyone else, keep it in the back pocket and reach for the individual selector instead - same power, a tenth of the clicking.