NeMo Guardrails is an open-source toolkit for easily adding programmable guardrails to LLM-based conversational systems.
C-Rank Grade: A (Welcoming) - 56/100
External PR Merge Rate: 62%
Response Time: 2d
First Timer Success: 31%
NVIDIA-NeMo/Guardrails has a recorded first-timer success rate of 30.8%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in NVIDIA-NeMo/Guardrails respond to incoming external pull requests in approximately 37.4 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 56.0 places NVIDIA-NeMo/Guardrails in the A tier.
The external contributor pull request merge rate for NVIDIA-NeMo/Guardrails is 62.0%, based on public PR activity from non-core contributors.
NVIDIA-NeMo/Guardrails currently has 1 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Rigorous architecture standards (71% critical review signals). Ensure PRs strictly follow guidelines before requesting review in NVIDIA-NeMo/Guardrails.
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/NVIDIA-NeMo/Guardrails?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 02:00 UTC (02:00 UTC in your timezone). Recommended submission window is Tuesday - Thursday from 08:00 to 12:00 UTC (08:00 - 12:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~24 hours (77% approval). Large PRs (>500 lines) take ~180 hours (28% approval). Keep your diff compact for rapid review.
Did you check docs and existing issues? I have read all the NeMo-Guardrails docs (not verified; this is a code-review follow-up) I have updated the package to the latest version before submitting this issue (not applicable; identified on an unmerged pull request) I have used the develop branch (the affected change targets develop) I have searched the existing issues of NeMo-Guardrails (not verified by this report) Python version (python --version) Not applicable — this is a static configuration-validation issue identified during review. Operating system/version Not applicable — the issue is independent of the operating system. NeMo-Guardrails version (if you must use a specific version and not the latest) Unreleased change in PR #2185. Describe the bug JailbreakDetectionConfig allows a remote nim_base_url using http://, and migrate_deprecated_fields() constructs an http:// URL from deprecated nim_url/nim_port inputs. The jailbreak detection action can use get_api_key() for re
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When evaluating whether to contribute to NVIDIA-NeMo/Guardrails, 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 NVIDIA-NeMo/Guardrails acknowledge new external contributions in approximately 1 days+. Out of all submitted pull requests from non-core authors in the last 180-day window, 62.0% were successfully merged into the primary branch.
NVIDIA-NeMo/Guardrails has a recorded first-timer success rate of 30.8%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~1 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 56.0 places NVIDIA-NeMo/Guardrails in the Welcoming tier.
The external pull request merge rate is 62.0%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, NVIDIA-NeMo/Guardrails currently has 1 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for NVIDIA-NeMo/Guardrails 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.