Mutation testing for Scala
C-Rank Grade: A (Welcoming) - 66/100
External PR Merge Rate: 94%
Response Time: 11d
First Timer Success: 100%
stryker-mutator/stryker4s has a recorded first-timer success rate of 100.0%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in stryker-mutator/stryker4s respond to incoming external pull requests in approximately 261.7 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 65.9 places stryker-mutator/stryker4s in the A tier.
The external contributor pull request merge rate for stryker-mutator/stryker4s is 94.4%, based on public PR activity from non-core contributors.
stryker-mutator/stryker4s does not currently have active "good first issue" tags indexed, but accepts external contributions through standard GitHub issue tracking.
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/stryker-mutator/stryker4s?utm_source=github&utm_medium=badge)
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
Calculating local time...
Calculating local time...
Detected: UTC
Maintainers are most responsive around 13:00 UTC (13:00 UTC in your timezone). Recommended submission window is Monday - Thursday from 11:00 to 15:00 UTC (11:00 - 15:00 UTC local).
Limited recent maintainer review activity recorded for this repository. Prediction based on heuristic baseline.
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No cached good first issues currently tracked for stryker-mutator/stryker4s.
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When evaluating whether to contribute to stryker-mutator/stryker4s, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of stryker-mutator/stryker4s acknowledge new external contributions in approximately 10 days+. Out of all submitted pull requests from non-core authors in the last 180-day window, 94.4% were successfully merged into the primary branch.
stryker-mutator/stryker4s has a recorded first-timer success rate of 100.0%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~10 days+. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 65.9 places stryker-mutator/stryker4s in the Welcoming tier.
The external pull request merge rate is 94.4%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
stryker-mutator/stryker4s does not have open beginner labels indexed currently, but external PRs for bugs and documentation improvements are evaluated via normal issue triage.
All metrics displayed for stryker-mutator/stryker4s are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.