Report · marked 25 Aug 2026
mui/material-ui
Solid foundations, held back in a few specific places.
JavaScript · 98,924 stars · 41,106 files · branch master
78
/100
A-
Instructions
26/27Whether the repo tells an agent how to behave before it starts guessing. Losing marks on readme as an entry point.Setup
14/20Whether an agent can install the project and get it running without a human. Losing marks on environment config and reproducible environment.Verification loop
21/25Whether an agent can check its own work. This is the category that most decides whether agent output is trustworthy. Losing marks on tests exist.Context economy
9/20Whether 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
01
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.
02
Environment config
Add a .env.example listing every variable with a safe placeholder value. It's the cheapest possible fix and it unblocks the whole first run.
03
Repository weight
Large binaries and vendored trees slow every operation an agent performs. Git LFS or a separate assets repo keeps the working tree navigable.
The full marking
Every deduction below names the file or setting it came from.
Instructions 26/27 A+
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
12/12
Specific enough that an agent can act on it.
8,940 characters, a workable length
names the actual commands to run
uses headings, so an agent can skim it
includes copyable code blocks
✗README as an entry point
2/3
README exists but never explains how to get the thing running.
Give the README an Install and a Usage heading with real commands under each. Agents pattern-match on those headings.
Setup 14/20 B+
Whether an agent can install the project and get it running without a human.
✓Deterministic install
6/6
pnpm-lock.yaml pins the dependency tree.
Found pnpm-lock.yaml
✓Discoverable commands
6/6
Commands are declared where an agent will look for them.
package.json scripts (preinstall, proptypes, deduplicate, build, build:ci, build:public…)
scripts/ directory
✗Environment config
0/4
Nothing documents the environment this needs. An agent will get a runtime error it can't diagnose.
Add a .env.example listing every variable with a safe placeholder value. It's the cheapest possible fix and it unblocks the whole first run.
✓Pinned runtime version
2/2
The language runtime version is pinned.
package.json engines.node >=22.23.2
✗Reproducible environment
0/2
No container or devcontainer definition.
A Dockerfile or devcontainer removes an entire class of 'it won't install' failures.
Verification loop 21/25 A-
Whether an agent can check its own work. This is the category that most decides whether agent output is trustworthy.
✗Tests exist
4/8
914 test files against 27675 source files.
Coverage is thin enough that an agent can break real behavior and still see green.
e.g. docs/pages/experiments/website/branding-theme-test.tsx, docs/src/modules/utils/extractTemplates.test.js, docs/src/modules/utils/replaceMarkdownLinks.test.js
✓Test command is discoverable
7/7
An agent can find and run `npm run test`.
✓Continuous integration
4/4
17 GitHub Actions workflows define what "passing" means.
✓Lint and format rules
3/3
eslint.config.mjs encodes the house style.
✓Static type checking
3/3
Strict type checking is on, which catches a whole class of agent mistakes before they run.
Context economy 9/20 C
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 46 patterns.
✗File sizes fit in context
0/6
6 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.
packages/mui-icons-material/lib/index.js — 2309KB
packages/mui-icons-material/lib/index.mjs — 740KB
docs/data/material/components/autocomplete/movies.ts — 260KB
✗Repository weight
0/5
About 744MB checked out. Large enough that cloning and searching are both slow.
Large binaries and vendored trees slow every operation an agent performs. Git LFS or a separate assets repo keeps the working tree navigable.
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 Material UI: Comprehensive React component library that implements Google's Material Design. Free forever. ## Setup ``` pnpm install ``` ## Commands ``` pnpm start # run the app pnpm build # produce a build pnpm test # run the test suite, must pass before any commit pnpm preinstall pnpm proptypes pnpm deduplicate pnpm build:ci pnpm build:public ``` ## Layout - `packages/` 24618 source files - `docs/` 2396 source files - `packages-internal/` 375 source files - `test/` 149 source files - `examples/` 120 source files - `scripts/` 10 source files ## Conventions - Tests live alongside the code they cover, following `docs/pages/experiments/website/branding-theme-test.tsx`. - TypeScript runs in strict mode. Type errors are the fastest feedback available, so do not weaken it. - CI defines what passing means. See `.github/workflows/check-if-pr-has-label.yml`, and keep it green. - TODO: add the two or three conventions a newcomer always gets wrong here. ## Gotchas - `packages/mui-icons-material/lib/index.js` is 2309KB. It will not fit comfortably in context, so read it in parts. --- 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/mui/material-ui.md
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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.