apache/arrow

At a glance

Rank

#348 of 401

#17 of 21 C++ repos

Checks passed

6 of 17

Full list below

Best set up for

Claude Code

Score 57.0

Needs most work for

Cursor

Biggest fix: Cursor rules (.cursor/rules) (+11.5 pts)

What to fix first

Showing fixes for Claude Code

1. 1
   AGENTS.md / CLAUDE.md

   Add an AGENTS.md covering project goals, layout, setup commands, and conventions. Aim for 800+ chars of real guidance (not boilerplate).
   +13.2 pts
2. 2
   Dependency manifest

   Commit a proper manifest (package.json, pyproject.toml, Cargo.toml, go.mod, etc.) plus a lockfile.
   +9.2 pts
3. 3
   Type configuration

   Add a type config (tsconfig.json for JS/TS, mypy.ini or pyrightconfig.json for Python). Rust/Go/JVM/Scala/Swift/C#/OCaml/Haskell/Zig are typed by default.
   +7.9 pts

Score for each AI agent

Each agent weighs the checks by its own docs. Under each score are its top three. How each agent is scored →

Does apache/arrow have agent instructions?

An AGENTS.md (or CLAUDE.md) at the root tells AI coding agents how to build, test and work in the repo. A few agents also read a file of their own.

AGENTS.md / CLAUDE.md

✗None at the root (no AGENTS.md, CLAUDE.md, AGENT.md, .claude/CLAUDE.md or .claude/AGENTS.md)

Agent-specific files

None: no GEMINI.md, .cursor/rules, .openhands/setup.sh, .aider.conf.yml or .agents/skills

Repos that have one

10 of 21 C++ repos · 221 of 401 repos on the leaderboard · See examples →

# AGENTS.md

Guidance for AI coding agents working in apache/arrow. Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics. Written mainly in C++.

## Where things are

- Test files are spread through the tree, e.g. `dev/test_merge_arrow_pr.py`.
- Lint and format rules are configured in `.rubocop.yml`.
- CI is defined in `.github/workflows`; read it for the exact install, lint and test steps.
- Commit hooks are set up in `.pre-commit-config.yaml`; don't skip them.
- A reproducible environment is defined in `compose.yaml`.
- Follow the conventions in `CONTRIBUTING.md`.

## Commands

<!-- Fill in the exact commands CI runs. -->
- Install: TODO
- Test: TODO
- Lint: TODO

How apache/arrow compares

vs leaderboard average

13.8 pts below

Average 66.8

vs C++ average

6.3 pts below

Average 59.3

Stars among C++ repos

#14 of 21

One fix for the most agents: AGENTS.md / CLAUDE.md would raise the score for all 9 agents, by up to 13.3 points.

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