Report · marked 10 Oct 2026

huggingface/diffusers

Solid foundations, held back in a few specific places.

Python · 34,701 stars · 2,895 files · branch main

73 /100 B+

Instructions 15/27Whether the repo tells an agent how to behave before it starts guessing. Losing marks on instruction quality.Setup 6/14Whether an agent can install the project and get it running without a human. Losing marks on deterministic install and pinned runtime version.Verification loop 24/25Whether an agent can check its own work. This is the category that most decides whether agent output is trustworthy. Losing marks on static type checking.Context economy 15/20Whether the repo fits in a context window, or fights it. Losing marks on file sizes fit in context and repository weight.Navigability 10/10How quickly anything new can orient itself. Full marks.

Higher is better. Accent marks what is costing you most.

Fix these first

Instruction quality

Worth fixing: it's under 200 characters, which is closer to a placeholder than instructions; it never states a build, test, or run command; has no headings to structure it; has no code blocks.

Deterministic install

Commit the lockfile your package manager generates. Without it, an agent's install and your install are different builds, and 'works on my machine' becomes unfalsifiable.

File sizes fit in context

A single file that fills the context window forces an agent to work from fragments, and it will confidently edit code it never saw. Splitting the worst offenders pays for itself immediately.

The full marking

Every deduction below names the file or setting it came from.

Instructions 15/27 B-

Whether the repo tells an agent how to behave before it starts guessing.

✓Agent instruction file 12/12

AGENTS.md is present, which is the format the most tools read.

Also found: CLAUDE.md

✗Instruction quality 0/12

Present but too thin to change an agent's behavior.

Worth fixing: it's under 200 characters, which is closer to a placeholder than instructions; it never states a build, test, or run command; has no headings to structure it; has no code blocks.

✓README as an entry point 3/3

README has a clear getting-started section.

Setup 6/14 C

Whether an agent can install the project and get it running without a human.

✗Deterministic install 0/6

No lockfile. An agent installing dependencies may not get what CI got.

Commit the lockfile your package manager generates. Without it, an agent's install and your install are different builds, and 'works on my machine' becomes unfalsifiable.

✓Discoverable commands 6/6

Commands are declared where an agent will look for them.

Makefile

scripts/ directory

–Environment config n/a

Not applicable — this reads as a library, with no environment to configure.

✗Pinned runtime version 0/2

No pinned runtime version.

Add a .nvmrc, .python-version, or equivalent so the agent's toolchain matches yours.

–Reproducible environment n/a

Not applicable — a library doesn't need a container to be worked on.

Verification loop 24/25 A+

Whether an agent can check its own work. This is the category that most decides whether agent output is trustworthy.

✓Tests exist 8/8

659 test files against 2131 source files.

e.g. .github/workflows/pr_dependency_test.yml, .github/workflows/pr_torch_dependency_test.yml, examples/advanced_diffusion_training/test_dreambooth_lora_flux_advanced.py

✓Test command is discoverable 7/7

An agent can find and run `make test`.

✓Continuous integration 4/4

35 GitHub Actions workflows define what "passing" means.

✓Lint and format rules 3/3

pyproject.toml encodes the house style.

✗Static type checking 2/3

Type checking is configured, but not in strict mode.

A type checker gives an agent an error message instead of a runtime surprise. It's the second-fastest feedback loop after the compiler.

Context economy 15/20 B+

Whether the repo fits in a context window, or fights it.

✓No committed build output 6/6

No generated directories committed.

✓.gitignore hygiene 3/3

.gitignore covers 101 patterns.

✗File sizes fit in context 2/6

23 source files are over 100KB.

A single file that fills the context window forces an agent to work from fragments, and it will confidently edit code it never saw. Splitting the worst offenders pays for itself immediately.

src/diffusers/loaders/lora_pipeline.py — 298KB

src/diffusers/models/attention_processor.py — 234KB

examples/community/matryoshka.py — 214KB

✗Repository weight 4/5

About 112.7MB checked out, which is comfortable.

Here is your AGENTS.md

Drafted from what is actually in this repository: the install command from your lockfile, the commands you already declare, your real directory layout. Anything marked TODO needs a person. Save it at the root as AGENTS.md.

AGENTS.md — drafted for huggingface/diffusers

# AGENTS.md

🤗 Diffusers: State-of-the-art diffusion models for image, video, and audio generation in PyTorch.

## Setup

```
# TODO: the install command. No lockfile was found, so this could not be inferred.
```

## Commands

```
make check_dirs
make modified_only_fixup
make deps_table_update
make autogenerate_code
make repo-consistency
make quality
```

## Layout

- `src/`        1059 source files
- `tests/`      627 source files
- `examples/`   308 source files
- `scripts/`    96 source files
- `utils/`      31 source files
- `benchmarks/` 8 source files

## Conventions

- Tests live alongside the code they cover, following `.github/workflows/pr_dependency_test.yml`.
- CI defines what passing means. See `.github/workflows/benchmark.yml`, and keep it green.
- TODO: add the two or three conventions a newcomer always gets wrong here.

## Gotchas

- `src/diffusers/loaders/lora_pipeline.py` is 298KB. It will not fit comfortably in context, so read it in parts.
- No lockfile is committed, so an install here may not match what CI produced.

---

Drafted by agentreadme.com from what is in this repository. Everything marked TODO
needs a human. Check it in as AGENTS.md at the root.

Open the raw markdown or curl -o AGENTS.md agentreadme.com/draft/huggingface/diffusers.md

A draft gets the commands right and stops at the things only a maintainer knows. What a good Python AGENTS.md looks like covers what to add by hand, and what AGENTS.md is explains the format itself.

Show the mark

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[![agent ready](https://agentreadme.com/badge/huggingface/diffusers.svg)](https://agentreadme.com/huggingface/diffusers)

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Think this mark is wrong?

Every deduction above names the file it came from, so this can be settled by looking. If a check missed something, that is a rule worth fixing.

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