Report · marked 9 Oct 2026

remix-run/remix

Solid foundations, held back in a few specific places.

TypeScript · 33,401 stars · 2,576 files · branch main

77 /100 B+

Instructions 25/27Whether the repo tells an agent how to behave before it starts guessing. Losing marks on instruction quality.Setup 18/20Whether an agent can install the project and get it running without a human. Losing marks on reproducible environment.Verification loop 19/25Whether an agent can check its own work. This is the category that most decides whether agent output is trustworthy. Losing marks on lint and format rules and static type checking.Context economy 7/20Whether the repo fits in a context window, or fights it. Losing marks on no committed build output and 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

No committed build output

Add these to .gitignore and `git rm -r --cached` them. Generated files pollute search results, so an agent grepping for a function finds the compiled copy and edits the wrong file.

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.

Lint and format rules

A formatter config is the cheapest way to stop reviewing whitespace in agent diffs. It moves style from opinion to a command.

The full marking

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

Instructions 25/27 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 10/12

Specific enough that an agent can act on it.

Worth fixing: has no code blocks.

7,809 characters, a workable length

names the actual commands to run

uses headings, so an agent can skim it

✓README as an entry point 3/3

README has a clear getting-started section.

Setup 18/20 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 (postinstall, build, changes:preview, changes:validate, changes:version, clean…)

scripts/ directory

✓Environment config 4/4

.env.example documents what the app needs to run.

✓Pinned runtime version 2/2

The language runtime version is pinned.

Found .nvmrc

✗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 19/25 B+

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

✓Tests exist 8/8

591 test files against 1799 source files.

e.g. demos/bookstore/app/actions/account/controller.test.ts, demos/bookstore/app/actions/admin/books/controller.test.ts, demos/bookstore/app/actions/admin/controller.test.ts

✓Test command is discoverable 7/7

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

✓Continuous integration 4/4

13 GitHub Actions workflows define what "passing" means.

✗Lint and format rules 0/3

No linter or formatter config. Style is tribal knowledge, so agent output will drift from yours.

A formatter config is the cheapest way to stop reviewing whitespace in agent diffs. It moves style from opinion to a command.

✗Static type checking 0/3

No static type checking.

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 7/20 D

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

✗No committed build output 0/6

Generated output is committed: node_modules/, coverage/.

Add these to .gitignore and `git rm -r --cached` them. Generated files pollute search results, so an agent grepping for a function finds the compiled copy and edits the wrong file.

✓.gitignore hygiene 3/3

.gitignore covers 22 patterns.

✗File sizes fit in context 0/6

5 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/assets/src/lib/asset-server.test.ts — 391KB

packages/fetch-router/demos/cf-workers/worker-configuration.d.ts — 347KB

packages/component/src/test/frame.test.tsx — 268KB

✗Repository weight 4/5

About 133.6MB 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 remix-run/remix

# AGENTS.md

The fully-stacked web framework

## Setup

```
pnpm install
```

## Commands

```
pnpm build              # produce a build
pnpm test               # run the test suite, must pass before any commit
pnpm typecheck          # type check without emitting
pnpm lint               # lint
pnpm format             # format
pnpm postinstall
pnpm changes:preview
pnpm changes:validate
```

## Layout

- `packages/` 1199 source files
- `demos/`    346 source files
- `docs/`     193 source files
- `scripts/`  48 source files
- `template/` 11 source files

## Conventions

- Tests live alongside the code they cover, following `demos/bookstore/app/actions/account/controller.test.ts`.
- CI defines what passing means. See `.github/workflows/aw-command-implement.lock.yml`, and keep it green.
- TODO: add the two or three conventions a newcomer always gets wrong here.

## Gotchas

- `packages/assets/src/lib/asset-server.test.ts` is 391KB. It will not fit comfortably in context, so read it in parts.
- Copy `.env.example` before running anything that needs configuration.

---

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/remix-run/remix.md

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

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Think this mark is wrong?

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