Agent Friendly Code

vitest-dev/vitest

GitHub
https://github.com/vitest-dev/vitest

Next generation testing framework powered by Vite.

  • test
  • testing-tools
  • vite
Stars:
17.3k
Language:
TypeScript
Default branch:
main
Last scored:
Overall

At a glance

Rank
#262 of 401
#69 of 82 TypeScript repos
Checks passed
7 of 17
Full list below
Best set up for
Claude Code
Score 70.9
Needs most work for
Aider
Biggest fix: .aider.conf.yml (+14.1 pts)

What it has

What it's missing

What to fix first

Pick an AI agent

Showing fixes for Claude Code

  1. 1
    Linter / formatter config
    Configure a linter/formatter (ESLint+Prettier, Biome, Ruff, rustfmt+clippy, golangci-lint) and commit the config.
    +7.9 pts
  2. 2
    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
  3. 3
    Pre-commit / git hooks
    Set up pre-commit (.pre-commit-config.yaml), husky, or lefthook to run format+lint on every commit.
    +5.3 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 →

Claude Code
#217 of 401
70.9
  • ✓AGENTS.md / CLAUDE.md
  • ✓Test suite
  • ~Reproducible dev env
Kimi Code CLI
#230 of 401
66.9
  • ✓AGENTS.md / CLAUDE.md
  • ✓Test suite
  • ✓Dependency manifest
Codex
#253 of 401
66.7
  • ✓AGENTS.md / CLAUDE.md
  • ✓README
  • ✓Test suite
Devin
#247 of 401
65.5
  • ~Reproducible dev env
  • ✓Dependency manifest
  • ✓Test suite
Pi
#257 of 401
64.1
  • ✓AGENTS.md / CLAUDE.md
  • ✓Test suite
  • ✗Linter / formatter config
OpenHands
#253 of 401
61.5
  • ✓CI configuration
  • ✓Dependency manifest
  • ~Reproducible dev env
Gemini CLI
#293 of 401
57.3
  • ✗GEMINI.md
  • ✓README
  • ✓Test suite
Cursor
#304 of 401
55.2
  • ✗Cursor rules (.cursor/rules)
  • ✓README
  • ✗Type configuration
Aider
#310 of 401
54.9
  • ✗.aider.conf.yml
  • ✗Linter / formatter config
  • ✓Test suite

Does vitest-dev/vitest 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
AGENTS.md (new tab) · 18,761 characters
Agent-specific files
None: no GEMINI.md, .cursor/rules, .openhands/setup.sh, .aider.conf.yml or .agents/skills
Repos that have one
62 of 82 TypeScript repos · 221 of 401 repos on the leaderboard · See examples →

All 17 checks · 7 passed

Skills (.agents/skills)· 0% pass
No .agents/skills/<name>/SKILL.md
AGENTS.md / CLAUDE.md· 100% pass
Substantive (18,761 characters)
AGENTS.md
.aider.conf.yml· 0% pass
No .aider.conf.yml at repo root
CI configuration· 100% pass
15 GitHub Actions workflows
.github/workflows
CONTRIBUTING guide· 100% pass
Guide present
CONTRIBUTING.md
Cursor rules (.cursor/rules)· 0% pass
No .cursor/rules/*.mdc or .cursorrules
Dependency manifest· 100% pass
Manifest present
package.json
Reproducible dev env· 60% pass
package.json has 32 scripts
package.json
GEMINI.md· 0% pass
No GEMINI.md at repo root
License file· 100% pass
License present
LICENSE
Linter / formatter config· 0% pass
No linter/formatter config found
.openhands/setup.sh· 0% pass
No .openhands/setup.sh
Pre-commit / git hooks· 0% pass
No pre-commit / husky / lefthook found
README· 100% pass
README detailed (4,169 characters)
README.md
Manageable size· 50% pass
3188 files — large
Test suite· 100% pass
Found /test
test
Type configuration· 0% pass
No type config found

How vitest-dev/vitest compares

vs leaderboard average
4.2 pts below
Average 66.8
vs TypeScript average
8.6 pts below
Average 71.2
Stars among TypeScript repos
#64 of 82

Missing here, and how many repos have it

  • Type configuration · passed by 68% of leaderboard repos, 68% of TypeScript repos
  • Linter / formatter config · passed by 65% of leaderboard repos, 57% of TypeScript repos
  • Pre-commit / git hooks · passed by 29% of leaderboard repos, 48% of TypeScript repos

One fix for the most agents: Linter / formatter config would raise the score for all 9 agents, by up to 14.1 points.

Similar repos

Same language and host as this repo, closest in overall score.

All TypeScript repos →

Same topics, any language

Repos tagged with the same GitHub topics, most shared first.

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Agent friendly score for github/vitest-dev/vitest
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Check the score on every pull request

A GitHub Action posts one comment per pull request with how the score changed and why.