Report · marked 26 Aug 2026
withastro/astro
Solid foundations, held back in a few specific places.
TypeScript · 62,045 stars · 6,699 files · branch main
82
/100
A-
Instructions
27/27Whether the repo tells an agent how to behave before it starts guessing. Full marks.Setup
16/20Whether an agent can install the project and get it running without a human. Losing marks on environment config.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
12/20Whether the repo fits in a context window, or fights it. Losing marks on no committed build output and file sizes fit in context.Navigability
5/10How quickly anything new can orient itself. Losing marks on written documentation and license.
Higher is better. Accent marks what is costing you most.
Fix these first
01
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.
02
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.
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 27/27 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.
✓Instruction quality
12/12
Specific enough that an agent can act on it.
8,882 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
3/3
README has a clear getting-started section.
Setup 16/20 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 (release, build, build:ci, build:ci:no-cache, build:examples, dev…)
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.
Found .nvmrc
✓Reproducible environment
2/2
.devcontainer/devcontainer.json gives a known-good environment.
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
4218 test files against 4582 source files.
e.g. configs/tsconfig.test.json, examples/container-with-vitest/test/Card.test.ts, examples/container-with-vitest/test/ReactWrapper.test.ts
✓Test command is discoverable
7/7
An agent can find and run `npm run test`.
✓Continuous integration
4/4
21 GitHub Actions workflows define what "passing" means.
✓Lint and format rules
3/3
eslint.config.js 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 12/20 B-
Whether the repo fits in a context window, or fights it.
✗No committed build output
3/6
Generated output is committed: node_modules/.
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 38 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.
packages/astro/src/types/public/config.ts — 125KB
✗Repository weight
2/5
About 233MB 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 The web framework for content-driven websites. ⭐️ Star to support our work! ## 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 typecheck # type check without emitting pnpm lint # lint pnpm format # format pnpm release pnpm build:ci ``` ## Layout - `packages/` 4337 source files - `examples/` 165 source files - `benchmark/` 60 source files - `scripts/` 9 source files ## Conventions - Tests live alongside the code they cover, following `configs/tsconfig.test.json`. - 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/check-merge.yml`, and keep it green. - TODO: add the two or three conventions a newcomer always gets wrong here. ## Gotchas - `packages/astro/src/types/public/config.ts` is 125KB. 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/withastro/astro.md
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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.