ComfyUI
ComfyUI is a app in the osFoundry community catalog. Node-based image generation studio. Build Stable Diffusion / SDXL / Flux workflows by wiring nodes on an infinite canvas — checkpoint loader → sampler → VAE → output, with full control over every step. Ships in CPU-only mode (generation is slow but works without GPU); drop in your own model checkpoints under /data/models/checkpoints to use the workflows you find on the ComfyUI community gallery. The most powerful open image-gen UI for prompt + workflow experimentation.
Details
- Workspace: osfoundry
- Category: CREATIVE
- Pricing: Free
- Access: Community
Features
- Node-based canvas — wire checkpoint, sampler, VAE, ControlNet, LoRA, upscaler into custom workflows
- Works with Stable Diffusion 1.5, SDXL, Stable Cascade, Flux, and most SD-compatible checkpoints
- Embedded workflows in output PNGs — drag any ComfyUI image back into the canvas to load its exact graph
- Community workflow gallery — import .json or .png from civitai / openart / comfyworkflows.com
- CPU-only mode bundled — works without a GPU (slower; ~minutes per step) for prompt and workflow iteration
- 50 GB persistent volume for checkpoints, LoRAs, VAEs, ControlNets, and generated outputs
Documentation
# ComfyUI
## Setup
ComfyUI ships in **CPU-only** mode — image generation works but is much slower than on a GPU (a 512×512 SD1.5 image takes 1-3 minutes per step). Use it for prompt iteration + workflow design; for production-speed rendering, run a GPU-equipped local instance.
## Drop in models
No models ship pre-installed (model files are 2-10 GB each). Mount your checkpoints into the data volume:
- Checkpoints → `/data/models/checkpoints/<name>.safetensors`
- LoRAs → `/data/models/loras/`
- VAEs → `/data/models/vae/`
- ControlNets → `/data/models/controlnet/`
Use the in-app **Manager** (or upload via the Files tab) to add models, or `curl` direct from HuggingFace into the mounted path.
## First workflow
1. Drop a checkpoint into `/data/models/checkpoints/`.
2. Refresh the browser tab. The default workflow loads (checkpoint → CLIP → KSampler → VAE → save).
3. Hit **Queue Prompt**. CPU generation takes several minutes — watch the progress bar in the bottom strip.
4. Output goes to `/data/output/`.
## Workflows
Drag any `.json` workflow file into the canvas — the community shares workflows on civitai, openart, comfyworkflows.com. ComfyUI also reads workflow JSON embedded in `.png` files generated by ComfyUI itself: drag the image back onto the canvas to reload the exact graph used.
How to use ComfyUI in osFoundry
Install ComfyUI into your workspace in one click, then fork it in osStudio to customise the prompts, tools, or configuration for your stack. Anyone in your workspace can pick up where you left off.
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