C++ and Python support for the CUDA Quantum programming model for heterogeneous quantum-classical workflows
C-Rank Grade: A (Welcoming) - 66/100
External PR Merge Rate: 71%
Response Time: 1d
First Timer Success: 59%
NVIDIA/cuda-quantum has a recorded first-timer success rate of 59.5%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in NVIDIA/cuda-quantum respond to incoming external pull requests in approximately 27.1 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 65.5 places NVIDIA/cuda-quantum in the A tier.
The external contributor pull request merge rate for NVIDIA/cuda-quantum is 70.6%, based on public PR activity from non-core contributors.
NVIDIA/cuda-quantum does not currently have active "good first issue" tags indexed, but accepts external contributions through standard GitHub issue tracking.
Highly welcoming maintainers in NVIDIA/cuda-quantum. 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/NVIDIA/cuda-quantum?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 17:00 UTC (17:00 UTC in your timezone). Recommended submission window is Wednesday - Friday from 22:00 to 02:00 UTC (22:00 - 02:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~18 hours (88% approval). Large PRs (>500 lines) take ~130 hours (32% approval). Keep your diff compact for rapid review.
Currently, we support a variety of math functions in C++ qpu kernels, e.g., std::sqrt, std::abs, etc. However, std::fmod is not supported.
Required prerequisites Consult the security policy. If reporting a security vulnerability, do not report the bug using this form. Use the process described in the policy to report the issue. Make sure you've read the documentation. Your issue may be addressed there. Search the issue tracker to verify that this hasn't already been reported. +1 or comment there if it has. If possible, make a PR with a failing test to give us a starting point to work on! Describe the bug Decomposition on Quake with multi-qubit exp_pauli with no basis hangs instead of failing/backing out. Looks like there's no check for this case which should cause the pass to fail immediately. The below report is from Claude: The culprit is in Decomposition.cpp lines 52–55. When basis is empty and enabledPatterns is also empty, it loads all decomposition patterns with populateWithAllDecompositionPatterns and then runs applyPatternsGreedily. With no basis: There's no conversion target telling the rewriter which op
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When evaluating whether to contribute to NVIDIA/cuda-quantum, 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/cuda-quantum acknowledge new external contributions in approximately 1 days+. Out of all submitted pull requests from non-core authors in the last 180-day window, 70.6% were successfully merged into the primary branch.
NVIDIA/cuda-quantum has a recorded first-timer success rate of 59.5%. 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 65.5 places NVIDIA/cuda-quantum in the Welcoming tier.
The external pull request merge rate is 70.6%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
NVIDIA/cuda-quantum 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 NVIDIA/cuda-quantum 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.