Report · marked 26 Aug 2026

FuelLabs/fuel-core

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

Rust · 56,888 stars · 1,010 files · branch master

86 /100 A

Instructions 27/27Whether the repo tells an agent how to behave before it starts guessing. Full marks.Setup 18/20Whether an agent can install the project and get it running without a human. Losing marks on environment config.Verification loop 20/22Whether 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 13/20Whether the repo fits in a context window, or fights it. Losing marks on file sizes fit in context and repository weight.Navigability 7/10How quickly anything new can orient itself. Losing marks on license.

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

Fix these first

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.

License

Without a license nobody can safely reuse this, and some tools will refuse to work with it at all.

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.

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.

1,842 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 18/20 A

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

✓Deterministic install 6/6

cargo.lock pins the dependency tree.

Found cargo.lock

✓Discoverable commands 6/6

Commands are declared where an agent will look for them.

Makefile

scripts/ directory

✗Environment config 2/4

Env vars are mentioned in the README but there's no example file to copy.

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 rust-toolchain.toml

✓Reproducible environment 2/2

docker-compose.yml gives a known-good environment.

Verification loop 20/22 A

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

✗Tests exist 6/8

113 test files against 784 source files.

e.g. .github/workflows/chaos-test.yml, bin/e2e-test-client/src/tests/collect_fee.rs, bin/e2e-test-client/src/tests/contracts.rs

✓Test command is discoverable 7/7

An agent can find and run `make test`.

✓Continuous integration 4/4

14 GitHub Actions workflows define what "passing" means.

✓Lint and format rules 3/3

clippy.toml encodes the house style.

–Static type checking n/a

Not applicable — the Rust compiler type checks every build.

Context economy 13/20 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 22 patterns.

✗File sizes fit in context 4/6

2 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.

crates/fuel-core/src/service/adapters/consensus_module/poa.rs — 187KB

crates/fuel-core/src/executor.rs — 177KB

✗Repository weight 0/5

About 911MB 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 FuelLabs/fuel-core

# AGENTS.md

Rust full node implementation of the Fuel v2 protocol.

## Setup

```
cargo build
```

## Commands

```
make help
make build       # produce a build
make debug
make fmt
make test        # run the test suite, must pass before any commit
make ci-checks
```

## Layout

- `crates/`                629 source files
- `tests/`                 65 source files
- `bin/`                   39 source files
- `benches/`               34 source files
- `version-compatibility/` 6 source files
- `xtask/`                 4 source files

## Conventions

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

## Gotchas

- `crates/fuel-core/src/service/adapters/consensus_module/poa.rs` is 187KB. 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/FuelLabs/fuel-core.md

Show the mark

The badge re-checks daily, so it keeps up as the repository changes. Use mark again to force it now.

[![agent ready](https://agentreadme.com/badge/FuelLabs/fuel-core.svg)](https://agentreadme.com/FuelLabs/fuel-core)

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All Rust repositories

Think this mark is wrong?

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