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Christian Byrne 0762985ca7 cleanup: remove the legacy mask editor and all related code (#7370) 
## Summary

Removes the legacy mask editor. May also want to remove the "Beta" tags
on all the current mask editor components/mentions in the app now as
well.

## Context

Telemetry data shows zero users using the legacy mask editor. It has
been considerable time since we switched to the new one, and there
really is no reason to use the legacy version given how lacking it is.

In https://github.com/Comfy-Org/ComfyUI_frontend/pull/7332 (v1.35.2 -
Dec 11, 2025), we added a final warning that the legacy mask editor is
being removed.

On 1.36, this PR can be merged, as more than enough warning will have
been given.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7370-cleanup-remove-the-legacy-mask-editor-and-all-related-code-2c66d73d365081d58fbed0f3c84bcb0d)
by [Unito](https://www.unito.io)
2025-12-22 07:17:31 -07:00
..
core.md
cleanup: remove the legacy mask editor and all related code (#7370)
2025-12-22 07:17:31 -07:00
development.md
[chore] Replace npx with pnpx across the codebase (#5329)
2025-09-26 10:06:41 -07:00
README.md
docs: Clarify extension terminology and dev server limitations (#5042)
2025-08-18 13:43:51 -07:00

README.md

ComfyUI Extensions Documentation

Overview

Extensions are the primary way to add functionality to ComfyUI. They can be custom nodes, custom nodes that render widgets (UIs made with javascript), ComfyUI shell UI enhancements, and more. This documentation covers everything you need to know about understanding, using, and developing extensions.

Documentation Structure

  • Development Guide - How to develop extensions, including:

    • Extension architecture and terminology
    • How extensions load (backend vs frontend)
    • Why extensions don't work in dev server
    • Development workarounds and best practices

  • Core Extensions Reference - Detailed reference for core extensions:

    • Complete list of all core extensions
    • Extension architecture principles
    • Hook execution sequence
    • Best practices for extension development

Quick Links

Key Concepts

  • Extension: Umbrella term for any code that extends ComfyUI
  • Custom Nodes: Python backend nodes (a type of extension)
  • JavaScript Extensions: Frontend UI enhancements
  • Core Extensions: Built-in extensions bundled with ComfyUI

Common Tasks

External Resources

Need Help?