tokio-rs/mio
Grade a repo

80

/ 100

GradeB

Well engineered. The main gaps are issue and PR templates and a reproducible setup.

Top 32% of 5,156 graded repos

Metal I/O library for Rust.

Documentation74
Engineering76
Health98
Rust7,069MIT5d ago

Top fixes

Highest-impact changes first, ranked by point weight

11 to address
  1. 1
    README12pt

    Add a GIF, screenshot, or logo image. It is the fastest way to show what your project does.

  2. 2
    README12pt

    Add CI/build status badges from shields.io or your CI provider to signal project health.

  3. 3
    Install and run instructions9pt

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

  4. 4
    Reproducibility6pt

    Run `cargo build` and commit the resulting Cargo.lock file.

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Scorecard

Every check, grouped by category and sorted worst-first

Documentation

74

Contributing guide5pt25

Contributing guidance is in the README, not a dedicated CONTRIBUTING.md (−20 pts).

→ Moving it to a CONTRIBUTING.md makes it easier to find and keeps the README focused. A dedicated file earns +47 pts base.

README12pt70

README is present.

Install and run instructions9pt90

README documents how to install the project.

License6pt100

Licensed under MIT.

Engineering

76

Issue and PR templates6pt0

No issue or PR templates found (−100 pts).

→ Add .github/ISSUE_TEMPLATE/ with bug_report.md and feature_request.md to guide contributors. It dramatically improves issue quality.

Reproducibility6pt5

No Cargo.lock found (−70 pts). Rust binary/application crates should commit Cargo.lock.

→ Run `cargo build` and commit the resulting Cargo.lock file.

Tests18pt100

Test files detected (tests).

CI/CD14pt100

CI is configured (.github/workflows/ci.yml).

Linting and formatting5pt100

Rust linting configured (cargo clippy in CI, cargo fmt in CI).

Project health

98

Dependency manifest6pt95

Dependency manifest found (Cargo.toml).

Repository metadata5pt100

Repository has a description.

Activity5pt100

Actively maintained (pushed within the last month).

Housekeeping3pt100

.gitignore present.

Repository health signals

Activity, community, and responsiveness at scan time

Activity

  • 15 / 22
    Commits (30d / 90d)
  • 856
    Forks
  • 3
    Releaseslatest 4y ago

Community

  • 37% - Weak
    Community health
  • 2 bus factor
    authors own >50% of commits
  • 7,069
    Watchers

Responsiveness

  • 11h
    Median issue response
  • 15h
    Median PR merge time
  • 21
    Open issues
Repository files10 root entries
  • .github
    Good: CI is configured (.github/workflows/ci.yml).
  • examples
  • src
  • tests
    Good: Test files detected (tests).
  • .gitignore
    Good: .gitignore present.
  • Cargo.toml
    Good: Dependency manifest found (Cargo.toml).
  • CHANGELOG.md
  • LICENSE
    Good: Licensed under MIT.
  • Makefile
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Issue: No screenshots or images in the README (−20 pts).Fix: Add a GIF, screenshot, or logo image. It is the fastest way to show what your project does.
    Good: README has code examples.
    Good: README links to a live demo or deployed app.
    Issue: No status badges in the README (−10 pts).Fix: Add CI/build status badges from shields.io or your CI provider to signal project health.
    Good: README documents how to install the project.
    Good: README documents how to run the project.
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