Reference implementation of the Jupyter Notebook format
C-Rank Grade: A (Welcoming) - 56/100
External PR Merge Rate: 58%
Response Time: 6h
First Timer Success: 100%
jupyter/nbformat 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 jupyter/nbformat respond to incoming external pull requests in approximately 6.3 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 55.9 places jupyter/nbformat in the A tier.
The external contributor pull request merge rate for jupyter/nbformat is 57.9%, based on public PR activity from non-core contributors.
jupyter/nbformat 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/jupyter/nbformat?utm_source=github&utm_medium=badge)
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When evaluating whether to contribute to jupyter/nbformat, 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 jupyter/nbformat acknowledge new external contributions in approximately 6 hours. Out of all submitted pull requests from non-core authors in the last 180-day window, 57.9% were successfully merged into the primary branch.
jupyter/nbformat 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 ~6 hours. 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 55.9 places jupyter/nbformat in the Welcoming tier.
The external pull request merge rate is 57.9%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
jupyter/nbformat 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 jupyter/nbformat 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.