BD For Each Run

The classic ComfyUI problem this solves: you have five images that each need the same downstream treatment - upscale, save, whatever - and you don't want to wire five parallel chains. BD_ForEachRun gives you up to 16 typed input slots (input_1 through input_16), and each time you queue a Run, it emits the next wired input plus its label. One chain downstream, run N times.

It's the "iterate over data" sibling to the pack's BD Bulk Save (which saves N files in one Run) - the README's rule of thumb is clean: Bulk Save when the downstream is just saving; ForEachRun when the downstream is more complex, like a per-iteration upscale before save, or a Qwen edit that needs to actually re-execute per item. Empty input slots are skipped, and the labels list aligns with the wired (non-empty) inputs.

How it works

State lives per workflow_id inside the node. In sequential mode (default), each queued Run advances to the next wired input, wrapping around with an iteration counter. manual mode picks a specific slot by manual_index. single always emits input_1. The reset toggle is edge-triggered: when it flips from false to true, the next Run starts back at the first wired input.

The node doesn't hold a batch or loop internally - it's stateful across Runs, which is why it suits "queue the workflow N times" workflows.

What comes out

• data - the current input (any type: IMAGE, MASK, STRING, whatever you wired).
• label - the label for this item, with label_prefix prepended. Default prefix is _, so label albedo comes out as _albedo - designed to drop straight into a save node's suffix.
• current_index / total_count / is_last - bookkeeping outputs for downstream logic (e.g. "skip this on the last item").
• status - a text line reporting which slot fired and the current iteration.

The typical setup

BD_DerivePBR maps (albedo, normal, roughness, metallic, ao)
  → input_1..input_5 of BD_ForEachRun
labels: "albedo\nnormal\nroughness\nmetallic\nao"
  → queue 5 runs → each emits one map + its label
  → downstream BD SaveFile uses label as the suffix

Queue five times and you've saved all five maps through a single save chain. That's the whole point: the per-item labels mean your save filenames stay correct without you hand-naming anything.

Install

Part of the BrainDead pack:

cd ComfyUI/custom_nodes
git clone https://github.com/BizaNator/ComfyUI-BrainDead
cd ComfyUI-BrainDead
pip install -r requirements.txt

Or search "BrainDead" in ComfyUI Manager and restart. Pure orchestration logic - no extra dependencies, just a current ComfyUI (the pack uses the V3 extension API).

Troubleshooting

• It errors "no inputs wired" - every slot is empty; the node needs at least one. Remember, empty slots are skipped, so a partially wired list just works with fewer items.
• Labels don't line up - labels align with wired inputs after skipping empties, not with slot numbers. If you left a hole in the middle, the label you thought was for input_3 now matches input_4.
• Two ForEach nodes fight each other - give each a distinct workflow_id.
• It never restarts from the top - that's sequential mode by design; flip reset or use manual_index.