Report · marked 4 Oct 2026

Hmbown/Codewhale

Ready for an agent to work in without hand-holding.

Rust · 41,039 stars · 2,992 files · branch main

88 /100 A

Instructions 27/27Whether the repo tells an agent how to behave before it starts guessing. Full marks.Setup 20/20Whether an agent can install the project and get it running without a human. Full marks.Verification loop 19/22Whether 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.Context economy 11/20Whether 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

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.

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.

Also found: CLAUDE.md

✓Instruction quality 12/12

Specific enough that an agent can act on it.

13,601 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 20/20 A+

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

✓Deterministic install 6/6

package-lock.json pins the dependency tree.

Found package-lock.json

✓Discoverable commands 6/6

Commands are declared where an agent will look for them.

package.json scripts (test, check:web)

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 rust-toolchain.toml

✓Reproducible environment 2/2

.devcontainer/devcontainer.json gives a known-good environment.

Verification loop 19/22 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

506 test files against 2017 source files.

e.g. .github/scripts/agent-task-metadata.test.sh, .github/scripts/release-workflows.test.js, .github/scripts/update-homebrew-tap.test.sh

✓Test command is discoverable 7/7

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

✓Continuous integration 4/4

31 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 n/a

Not applicable — the Rust compiler type checks every build.

Context economy 11/20 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 112 patterns.

✗File sizes fit in context 0/6

106 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.

patches/unicode-width-0.2.2/src/tables.rs — 1527KB

crates/tui/src/tui/ui/tests.rs — 1169KB

crates/tui/src/core/engine/tests.rs — 1116KB

✗Repository weight 2/5

About 274MB 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 — drafted for Hmbown/Codewhale

# AGENTS.md

Open-source coding agent for your terminal, built in Rust and on a journey of continuous community improvement. Issues and PRs welcome.

## Setup

```
npm ci
```

## Commands

```
npm run test        # run the test suite, must pass before any commit
npm run check:web
```

## Layout

- `crates/`       1331 source files
- `web/`          381 source files
- `scripts/`      126 source files
- `pet/`          73 source files
- `integrations/` 27 source files
- `npm/`          19 source files

## Conventions

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

## Gotchas

- `patches/unicode-width-0.2.2/src/tables.rs` is 1527KB. 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/Hmbown/Codewhale.md

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

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All Rust repositories

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.

Open an issue, already filled in