Report · marked 25 Aug 2026

chartjs/Chart.js

An agent can work here, but it will waste turns finding its footing.

JavaScript · 67,662 stars · 1,758 files · branch master

69 /100 B

Instructions 2/27Whether the repo tells an agent how to behave before it starts guessing. Losing marks on agent instruction file and instruction quality.Setup 12/14Whether an agent can install the project and get it running without a human. Losing marks on 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 18/20Whether the repo fits in a context window, or fights it. Losing marks on file sizes fit in context.Navigability 10/10How quickly anything new can orient itself. Full marks.

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

Fix these first

Agent instruction file

Add an AGENTS.md at the root: what the project is, how to install, how to run, how to test, and the two or three conventions a newcomer always gets wrong.

Instruction quality

Instructions earn their keep by naming exact commands. 'Run the tests with `pnpm test`' beats three paragraphs of philosophy.

Pinned runtime version

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

The full marking

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

Instructions 2/27 F

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

✗Agent instruction file 0/12

None found. Every agent that opens this repo starts from zero.

Add an AGENTS.md at the root: what the project is, how to install, how to run, how to test, and the two or three conventions a newcomer always gets wrong.

Looked for AGENTS.md, CLAUDE.md, .github/copilot-instructions.md, .cursorrules

✗Instruction quality 0/12

Nothing to judge, since there are no instructions.

Instructions earn their keep by naming exact commands. 'Run the tests with `pnpm test`' beats three paragraphs of philosophy.

✗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 12/14 A

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 (autobuild, copyDeclarations, emitDeclarations, build, dev, dev:ff…)

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

1455 test files against 747 source files.

e.g. test/.eslintrc.yml, test/BasicChartWebWorker.js, test/fixtures/controller.bar/aligned-pixels.js

✓Test command is discoverable 7/7

An agent can find and run `npm run test`.

✓Continuous integration 4/4

5 GitHub Actions workflows define what "passing" means.

✓Lint and format rules 3/3

.eslintrc.yml encodes the house style.

✗Static type checking 2/3

Type checking is configured, but not in strict mode.

Turn on `"strict": true`. Type errors are the fastest feedback an agent gets, and non-strict mode silently discards most of them.

Context economy 18/20 A

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 25 patterns.

✗File sizes fit in context 4/6

1 source file is 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/types/index.d.ts — 118KB

✓Repository weight 5/5

About 43.6MB 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 chartjs/Chart.js

# AGENTS.md

Simple HTML5 Charts using the <canvas> tag

## Setup

```
pnpm install
```

## Commands

```
pnpm dev                # run locally
pnpm build              # produce a build
pnpm test               # run the test suite, must pass before any commit
pnpm lint               # lint
pnpm autobuild
pnpm copyDeclarations
pnpm emitDeclarations
pnpm dev:ff
```

## Layout

- `test/`    637 source files
- `src/`     90 source files
- `docs/`    8 source files
- `scripts/` 4 source files
- `auto/`    3 source files
- `helpers/` 3 source files

## Conventions

- Tests live alongside the code they cover, following `test/.eslintrc.yml`.
- TypeScript is not in strict mode. Turning it on catches a whole class of mistakes before they run.
- CI defines what passing means. See `.github/workflows/ci.yml`, and keep it green.
- TODO: add the two or three conventions a newcomer always gets wrong here.

## Gotchas

- `src/types/index.d.ts` is 118KB. 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/chartjs/Chart.js.md

Show the mark

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[![agent ready](https://agentreadme.com/badge/chartjs/Chart.js.svg)](https://agentreadme.com/chartjs/Chart.js)

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All JavaScript repositories

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