preactjs/preactNew scan
95/ 100 · A

A top-tier open source project. Docs, tests, and CI are all in excellent shape.

⚛️ Fast 3kB React alternative with the same modern API. Components & Virtual DOM.

JavaScript38,697 starsMITupdated 2d ago

Outstanding work. A score of 95/100 puts this repo in a very small tier of truly well-engineered open source projects.

DocumentationREADME, setup, examples, license
96
EngineeringTests, CI, linting, lockfiles
93
Project healthDescription, activity, stars, deps
100

What to fix first

The highest-impact improvements for this repo.

  1. 1
    CI/CD
    EngineeringInfo

    Add `tsc --noEmit`, `mypy`, or `cargo check` to catch type errors before they merge.

  2. 2
    Install and run instructions
    DocumentationInfo

    Add a .env.example listing all required environment variables so contributors know what to set up.

  3. 3
    Reproducibility
    EngineeringInfo

    Add a Dockerfile, .nvmrc, or .python-version to pin the runtime version and make the environment reproducible.

Detailed breakdown

Documentation

96
  • README100
    • README is present.
    • README is well structured with multiple sections.
    • README includes screenshots or visuals. Great for first impressions.
    • README has code examples.
    • README links to a live demo or deployed app.
    • README includes status badges.
  • Install and run instructions90
    • README documents how to install the project.
    • README documents how to run the project.
    • If your project uses environment variables, add a .env.example listing them (+10 pts).Add a .env.example listing all required environment variables so contributors know what to set up.
  • License100
    • Licensed under MIT.
  • Contributing guide95
    • Contributing guide is detailed and thorough.
    • Contributing guide includes setup/install instructions.
    • Contributing guide lacks a code style section (−8 pts).Describe your linting/formatting rules and how to run them (e.g. npm run lint, ruff check .).
    • Contributing guide explains how to run tests.
    • Contributing guide describes the PR/review workflow.
    • Contributing guide includes code examples.
    • Code of conduct present.

Engineering

93
  • Tests100
    • Test files detected (compat/test).
  • CI/CD100

    Not applicable?

    • CI is configured (.github/workflows/build-test.yml).
    • CI workflow runs tests.
    • CI runs on pull requests, not just on pushes to main.
    • CI workflow runs a lint or format check.
    • Optional: add type checking to CI.Add `tsc --noEmit`, `mypy`, or `cargo check` to catch type errors before they merge.
    • CI reports or uploads test coverage.
    • CI caches dependencies for faster runs.
    • CI includes a build step.
  • Linting and formatting75
    • Linter or formatter configured (.editorconfig).
    • Lint script wired into package.json.
  • Reproducibility70
    • Lockfile present (package-lock.json). Installs are reproducible.
    • No Dockerfile or runtime version pin found. Adding one earns +10 pts.Add a Dockerfile, .nvmrc, or .python-version to pin the runtime version and make the environment reproducible.
    • No Dependabot config (adding it earns up to +20 pts).Add .github/dependabot.yml with at least one package-ecosystem entry so dependencies are updated automatically.
  • Issue and PR templates90
    • Issue or PR templates present.
    • Optional: add a SECURITY.md.A SECURITY.md explains how to responsibly disclose vulnerabilities. Worth adding once the project has real users.

Project health

100
  • Dependency manifest100
    • Dependency manifest found (package.json).
    • package.json has a description field.
    • package.json links back to the repository.
  • Repository metadata100
    • Repository has a description.
    • Primary language detected: JavaScript.
    • package.json metadata is complete (description, keywords, repository).
  • Activity100
    • Actively maintained (pushed within the last month).
    • 38,697 stars.
  • Housekeeping100
    • .gitignore present.
Repository files32 root entries
  • .github
    Good: Code of conduct present.
    Good: CI is configured (.github/workflows/build-test.yml).
    Good: Issue or PR templates present.
  • .husky
  • compat
    Good: Test files detected (compat/test).
  • config
  • debug
  • demo
  • devtools
  • hooks
  • jsx-runtime
  • scripts
  • src
  • test
  • test-utils
  • types
  • .editorconfig
    Good: Linter or formatter configured (.editorconfig).
  • .gitignore
    Good: .gitignore present.
  • .gitmodules
  • .oxlintrc.json
  • .prettierignore
  • babel.config.js
  • benchmarks
  • biome.json
  • CONTRIBUTING.md
    Good: Contributing guide is detailed and thorough.
    Good: Contributing guide includes setup/install instructions.
    Info: Contributing guide lacks a code style section (−8 pts).Fix: Describe your linting/formatting rules and how to run them (e.g. npm run lint, ruff check .).
    Good: Contributing guide explains how to run tests.
    Good: Contributing guide describes the PR/review workflow.
    Good: Contributing guide includes code examples.
  • jsconfig-lint.json
  • jsconfig.json
  • LICENSE
    Good: Licensed under MIT.
  • mangle.json
  • package-lock.json
    Good: Lockfile present (package-lock.json). Installs are reproducible.
  • package.json
    Good: Dependency manifest found (package.json).
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Good: README includes screenshots or visuals. Great for first impressions.
    Good: README has code examples.
    Good: README links to a live demo or deployed app.
    Good: README includes status badges.
    Good: README documents how to install the project.
    Good: README documents how to run the project.
  • vitest.config.mjs
  • vitest.setup.js