viz

A command that turns a ComfyUI workflow into a Mermaid flowchart. ComfyUI is a tool for building image-generation workflows from connected processing steps, and Mermaid is a text format for diagrams.

In plain words
What is it for?
Use it with a ComfyUI workflow in API format, either from a file or pasted JSON, to produce a left-to-right diagram.
Why use it?
It makes a workflow's steps, settings, and connections easier to inspect than raw JSON.

Command

Part of the comfy plugin — 32 skills, 11 commands, 4 agents, 2 hooks shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/sandyup/comfyui-mcp/viz
Clone the repo
git clone --depth 1 https://github.com/sandyup/comfyui-mcp

Or install comfy, the plugin that ships this one along with the rest of its 32 skills, 11 commands, 4 agents, 2 hooks.

Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 445 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 91% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00012 $0.00445
Opus 5 $0.00006 $0.00222
Sonnet 5 $0.00002 $0.00089
Haiku 4.5 $0.00001 $0.00044

Measured 2d ago against content hash c88dfc4917c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

viz scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

91% identical to viz — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugin/commands/viz.md · 40 lines

What it actually says

/comfy-viz — Visualize a Workflow

The user wants to visualize a ComfyUI workflow as a mermaid flowchart diagram.

Instructions

  1. Get the workflow JSON. The argument may be: $ARGUMENTS

    • A file path to a workflow JSON file — read it with the Read tool
    • Inline JSON pasted directly as the argument
    • Nothing — ask the user to provide a workflow file path or paste the JSON
  2. Validate the input. The workflow must be in ComfyUI's API format: an object where keys are node IDs and values have class_type and inputs. If it looks like the web UI format (has nodes and links arrays), tell the user it needs to be in API format and suggest they export it via "Save (API Format)" in ComfyUI.

  3. Visualize. Use the visualize_workflow tool with:

    • workflow: the parsed workflow JSON
    • show_values: true (to include parameter values in node labels)
    • direction: "LR" (left-to-right, easiest to read)
  4. Present the diagram. Show the mermaid output to the user. The mermaid code block will render as a flowchart showing nodes grouped by category with labeled connections.

Example

User: /comfy-viz ~/workflows/my-workflow.json

Steps:

  • Read the file at ~/workflows/my-workflow.json
  • Pass contents to visualize_workflow
  • Display the mermaid diagram

Notes

  • If the workflow is very large (50+ nodes), suggest using direction: "TB" (top-to-bottom) for better readability
  • The diagram groups nodes into subgraphs by category: loading, conditioning, sampling, image, output
  • Connection edges are labeled with data types (MODEL, CLIP, CONDITIONING, LATENT, IMAGE, VAE, etc.)
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 40 lines · 12 tokens per session scan A c88dfc4917c0

Subscribe to this mod's changes

viz is a command published in the GitHub repository sandyup/comfyui-mcp (1 stars, last pushed 1mo ago), licensed MIT. It adds 12 tokens to every session and 445 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to viz, differing in 6 lines, and is treated as a copy.