MCPInstall

comfyui-inventory

by mckruzBackend & APIs

Discover and cache all installed ComfyUI models, custom nodes, and system capabilities. Works online (API queries) and offline (directory scanning). Use before generating workflows to verify available resources.

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564
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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/mckruz/comfyui-expert --skill comfyui-inventory
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads comfyui-inventory automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

ComfyUI Inventory Skill

Discovers what's installed in the user's ComfyUI instance and caches results for workflow validation.

Purpose

Every workflow generation MUST be preceded by an inventory check. This prevents:

  • Referencing models that aren't downloaded
  • Using nodes that aren't installed
  • Exceeding VRAM limits

Two Discovery Modes

Online Mode (ComfyUI API Running)

Query the live server for authoritative information.

1. System info:

curl http://127.0.0.1:8188/system_stats

Extracts: GPU name, total VRAM, free VRAM, ComfyUI version.

2. Installed nodes:

curl http://127.0.0.1:8188/object_info

Returns all registered node classes with their input/output specifications.

3. Installed models (per type):

curl http://127.0.0.1:8188/models/checkpoints
curl http://127.0.0.1:8188/models/loras
curl http://127.0.0.1:8188/models/vae
curl http://127.0.0.1:8188/models/controlnet
curl http://127.0.0.1:8188/models/clip
curl http://127.0.0.1:8188/models/clip_vision
curl http://127.0.0.1:8188/models/upscale_models
curl http://127.0.0.1:8188/models/diffusion_models

Offline Mode (Directory Scan)

When ComfyUI isn't running, scan the filesystem directly.

Requires: ComfyUI installation path (e.g., C:\ComfyUI)

Scan directories:

{ComfyUI}/models/checkpoints/    → .safetensors, .ckpt
{ComfyUI}/models/loras/          → .safetensors
{ComfyUI}/models/vae/            → .safetensors, .pt
{ComfyUI}/models/controlnet/     → .safetensors, .pth
{ComfyUI}/models/clip/           → .safetensors
{ComfyUI}/models/clip_vision/    → .safetensors
{ComfyUI}/models/upscale_models/ → .pth, .safetensors
{ComfyUI}/models/diffusion_models/ → .safetensors
{ComfyUI}/models/ipadapter/      → .safetensors, .bin
{ComfyUI}/models/instantid/      → .bin
{ComfyUI}/models/insightface/    → .onnx + folders
{ComfyUI}/models/facerestore_models/ → .pth
{ComfyUI}/models/ultralytics/bbox/ → .pt
{ComfyUI}/custom_nodes/          → folder names = node packages

Custom node detection: List directories under custom_nodes/. Each directory name corresponds to a node package (e.g., ComfyUI_IPAdapter_plus, ComfyUI-Impact-Pack).

Cache Format

Save results to state/inventory.json:

{
  "last_updated": "2026-02-06T12:00:00Z",
  "mode": "online",
  "comfyui_version": "0.3.10",
  "system": {
    "gpu": "NVIDIA RTX 5090",
    "vram_total_gb": 32,
    "vram_free_gb": 28
  },
  "models": {
    "checkpoints": ["flux1-dev.safetensors", "RealVisXL_V5.0.safetensors"],
    "loras": ["sage_character.safetensors"],
    "vae": ["ae.safetensors", "wan_2.1_vae.safetensors"],
    "controlnet": ["instantid_controlnet.safetensors"],
    "clip": ["t5xxl_fp16.safetensors", "clip_l.safetensors"],
    "clip_vision": ["CLIP-ViT-H-14-laion2B-s32B-b79K.safetensors"],
    "upscale_models": ["4x-UltraSharp.pth"],
    "diffusion_models": ["wan2.1_i2v_720p_14b_bf16.safetensors"],
    "ipadapter": ["ip-adapter-faceid-plusv2_sd15.bin"],
    "instantid": ["ip-adapter.bin"],
    "insightface": ["inswapper_128.onnx"],
    "facerestore": ["codeformer.pth"],
    "detection": ["face_yolov8m.pt"]
  },
  "custom_nodes": [
    "ComfyUI-Manager",
    "ComfyUI_IPAdapter_plus",
    "ComfyUI_InstantID",
    "ComfyUI-Impact-Pack",
    "ComfyUI-AnimateDiff-Evolved",
    "ComfyUI-VideoHelperSuite"
  ]
}

Workflow Validation

Given a workflow JSON, validate against inventory:

For each node:
  1. Check class_type against known node classes
  2. If missing: identify which custom_node package provides it
  3. Suggest install: "Install via ComfyUI-Manager: {package_name}"

For each model reference:
  1. Check filename against inventory models of that type
  2. If missing: look up in references/models.md for download link
  3. Report: "Missing: {filename} - Download from {url} -> {path}"

Common Node-to-Package Mapping

Node ClassPackage
ApplyInstantIDComfyUI_InstantID
IPAdapterUnifiedLoaderComfyUI_IPAdapter_plus
FaceDetailerComfyUI-Impact-Pack
ReactorFaceSwapComfyUI-ReActor
AnimateDiffLoaderWithContextComfyUI-AnimateDiff-Evolved
VideoHelper*ComfyUI-VideoHelperSuite
ControlNetApply*comfyui_controlnet_aux
UltimateSDUpscaleComfyUI_UltimateSDUpscale
VHS_*ComfyUI-VideoHelperSuite
RIFE*ComfyUI-Frame-Interpolation

Cache Freshness

  • Cache is valid for 1 hour during active sessions
  • Invalidate cache when user installs new models/nodes
  • Force refresh: scan-inventory.ps1 or API re-query

Integration

  • Called by comfyui-workflow-builder before generating workflows
  • Called by comfyui-character-gen (via agent wrapper) for model selection
  • Called by comfyui-troubleshooter when diagnosing missing model errors
  • Results stored in state/inventory.json for all skills to reference

FAQ

What does the comfyui-inventory skill do?

Discover and cache all installed ComfyUI models, custom nodes, and system capabilities. Works online (API queries) and offline (directory scanning). Use before generating workflows to verify available resources.

How do I install comfyui-inventory?

Run npx skills add https://github.com/mckruz/comfyui-expert --skill comfyui-inventory in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/comfyui-inventory/ (personal) or .claude/skills/comfyui-inventory/ (project).

Which AI agents can use comfyui-inventory?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is comfyui-inventory safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains comfyui-inventory?

It is published by mckruz in mckruz/comfyui-expert. It has 564 recorded installs.

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