A standard API for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)
C-Rank Grade: A (Welcoming) - 63/100
External PR Merge Rate: 67%
Response Time: -
First Timer Success: 80%
Farama-Foundation/Gymnasium has a recorded first-timer success rate of 80.0%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in Farama-Foundation/Gymnasium respond to incoming external pull requests in approximately 0.0 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 63.0 places Farama-Foundation/Gymnasium in the A tier.
The external contributor pull request merge rate for Farama-Foundation/Gymnasium is 66.7%, based on public PR activity from non-core contributors.
Farama-Foundation/Gymnasium currently has 2 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Highly welcoming maintainers in Farama-Foundation/Gymnasium. Prompt code reviews with positive guidance for new contributors.
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/Farama-Foundation/Gymnasium?utm_source=github&utm_medium=badge)
Historical health & responsiveness evolution
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
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Detected: UTC
Maintainers are most responsive around 08:00 UTC (08:00 UTC in your timezone). Recommended submission window is Monday - Wednesday from 08:00 to 12:00 UTC (08:00 - 12:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~7 hours (84% approval). Large PRs (>500 lines) take ~54 hours (30% approval). Keep your diff compact for rapid review.
Given the recently merged new rendering of each environment, could someone please create a PR that updates the gif to show an intelligently learned policy for it?
We're in the process of reskinning all of Farama's pixel art environments across projects to a single professional format given the amount they're used in schools. If someone could throw up a PR using this set for toy text Taxi I'd be highly grateful taxi.zip
We're in the process of reskinning all of Farama's pixel art environments across projects to a single professional format given the amount they're used in schools. If someone could throw up a PR using this set for toy text black I'd be highly grateful blackjack.zip
Given the recently merged new rendering of cliff walking, could someone please create a PR that updates the gif to show an intelligently learned policy for it?
We're in the process of reskinning all of Farama's pixel art environments across projects to a single professional format given the amount they're used in schools. If someone could throw up a PR using this initial set for toy text frozen like I've be highly grateful frozen_lake.zip
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When evaluating whether to contribute to Farama-Foundation/Gymnasium, 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 Farama-Foundation/Gymnasium acknowledge new external contributions in approximately -. Out of all submitted pull requests from non-core authors in the last 180-day window, 66.7% were successfully merged into the primary branch.
Farama-Foundation/Gymnasium has a recorded first-timer success rate of 80.0%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~-. 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 63.0 places Farama-Foundation/Gymnasium in the Welcoming tier.
The external pull request merge rate is 66.7%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, Farama-Foundation/Gymnasium currently has 2 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for Farama-Foundation/Gymnasium 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.