custom-blocks SKILL.md skillA
custom-blocks from modem-dev/ossrules is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add modem-dev/ossrules/custom-blocks@git:20260917.a2709ecPins git:20260917.a2709ec in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- modem-dev/ossrules
- Path
public/files/diffusers/.ai/skills/custom-blocks/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260917.a2709ec, committed Sep 17, 2026
- Size
- 6,945 bytes
- Repository stars
- 65
- License
- MIT
Use when the user has written (or wants to write) a `ModularPipelineBlocks` subclass in a local Python file and needs to package it into a Hub-uploadable directory. Covers the workflow from a single `block.py` file to a published custom-block repo that consumers can load via `ModularPipeline.from_pretrained(<repo>, trust_remote_code=True)`.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## What this skill is for A `ModularPipelineBlocks` subclass is a unit of pipeline logic — input/output spec plus a `__call__` — that slots into diffusers' modular pipeline composition. Once you have one defined locally, you almost always want to publish it as a small Hub repo so others can `from_pretrained` it. `diffusers-cli custom_blocks` automates the packaging step: it parses your Python file, instantiates the chosen block class, and writes a `save_pretrained`-style directory in your cwd that's ready to push to the Hub. Use this skill when: - The user is writing a custom modular block and asks "how do I publish this?" or "package this for the Hub". - The user has a `block.py` (or similar) file with one or more `ModularPipelineBlocks` subclasses. - You're scaffolding a new modular pipeline repo and need the on-disk layout that `ModularPipelineBlocks.from_pretrained` expects. Don't use this skill for: running an existing modular pipeline (`diffusers-cli run`), introspecting one (`diffusers-cli schema`), or writing the block class itself — this skill packages an *already-written* block. ## The end-to-end workflow ``` …
Read the whole file at its exact version.
How to install
mdr add modem-dev/ossrules/custom-blocks@sha256:becb119c4b273cdeThe line at the top of this page pins the label git:20260917.a2709ec, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_rjqs3sbarqc2xkd5)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 17, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6945 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
modem-dev/ossrules · 65 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rjqs3sbarqc2xkd5 GET https://markdownregistry.com/api/v1/resolve?ref=modem-dev/ossrules/custom-blocks GET https://markdownregistry.com/api/v1/blob/becb119c4b273cded5886ba0c9a4191338ceb9daeaa2cc8c37d7affd945b0042
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.