# Hugging Face — Introducing Modular Diffusers - Composable Building Blocks for Diffusion Pipelines

- Company: Hugging Face (huggingface.co)
- Announced: 2026-03-05T00:00:00+00:00
- Category: developer-tool-release
- Subject: Platform
- Models affected: FLUX.2 Klein 4B, Depth Anything V2, Qwen-Image
- Source: https://huggingface.co/blog/modular-diffusers
- Record: https://forck.live/items/1540-introducing-modular-diffusers-composable-building-blocks-for-diffusion-pipelines

Hugging Face introduces Modular Diffusers, a new composable block-based system for building diffusion pipelines, allowing users to mix and match reusable blocks instead of writing entire pipelines from scratch. The post includes a quickstart example using FLUX.2 Klein 4B, instructions for creating custom blocks (e.g., a DepthProcessorBlock using Depth Anything V2), and integration with a node-based visual interface called Mellon.

## Evidence

Verbatim from https://huggingface.co/blog/modular-diffusers:

> Modular Diffusers introduces a new way to build diffusion pipelines by composing reusable blocks. Instead of writing entire pipelines from scratch, you can mix and match blocks to create workflows tailored to your needs!

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Record: https://forck.live/items/1540-introducing-modular-diffusers-composable-building-blocks-for-diffusion-pipelines
Catalogue: https://forck.live/llms.txt
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