SP_SDLoader

Here's the thing that makes SP_SDLoader the odd one out in this pack: every other loader in SP-Nodes drags along dependencies - ComfyUI-GGUF here, a bitsandbytes pack there. This one uses only stock ComfyUI nodes. It loads an SD 1.5/SDXL checkpoint, optional LoRA, encodes your prompt, and hands you a ready-to-sample pipe, and it does it with nothing but what ships in ComfyUI itself. If you're on a plain SD checkpoint and you want the pack's "one node instead of six" convenience without installing anything else, this is the one.

It's a group node like its siblings - at execution time ComfyUI's GraphBuilder expands it into CheckpointLoaderSimple, an optional VAELoader and LoraLoader, a CLIPSetLastLayer, two CLIPTextEncode, and an EmptyLatentImage - so the single widget panel is really a stock SD rig with a bow on it. Outputs are sp_pipe, model, clip, vae, positive, negative, latent, feeding the pack's SP_KSampler through the SP_PIPE type or any ordinary sampler.

Inputs you'll actually set:

• ckpt_name - from models/checkpoints, so SD 1.5 and SDXL merge files both work. This is the one input that's a checkpoint, not a separate unet.
• vae_name - Baked or an external VAE from models/vae. Baked is the pragmatic default: it uses whatever VAE is fused into the checkpoint, which is fine for the vast majority of SD 1.5/SDXL merges.
• lora_name + lora_strength - optional, applied at strength to both model and clip.
• stop_at_clip_layer - the old clip-skip dial, default -1 (no skip). Some SD 1.5 checkpoints were trained expecting -2; SDXL should stay at -1 because clip skip does nothing for it. If you don't know why you're changing it, leave it.
• positive / negative, plus the resolution presets (31 of them; width x height (custom) falls through to empty_latent_width/height).

A note for people coming from the newer models: this node is for the old family, where negative prompts and CFG 4–7 genuinely do what you expect - the guidance-distillation rules that make CFG 1 and no-negative the modern default don't apply here. That's exactly why this loader still makes sense: SD 1.5 and SDXL fine-tunes (Illustrious, NoobAI, Pony, WAI) are a huge chunk of what people actually run, and they behave like the docs tell you.

Install is the pack-wide recipe:

cd ComfyUI/custom_nodes
git clone https://github.com/bananasss00/ComfyUI-SP-Nodes

or ComfyUI Manager → SP-Nodes, then restart. On first launch the pack auto-installs nltk and pyyaml and downloads the punkt tokenizer - harmless background noise. Because SP_SDLoader stays on CheckpointLoaderSimple, it's also the most forgiving SP loader to start with if you're just trying the pack's group-node workflow: install the pack, drop in SP_SDLoader + SP_KSampler, and you've got a working SD rig with no missing-node surprises.