Welcoming Repositories Index Starlark Ecosystem
Top Welcoming Open-Source Starlark Repositories
Top welcoming Starlark repositories. Scored by real 90-day external PR merge rates, maintainer review turnaround speed, and first-time contributor success.
Updated daily • Sun, 30 Aug 2026 UTC
Tracked Repos
33
>100 stars verified
Avg Merge Rate
29%
90-day external PRs
Open GFIs
7
Beginner friendly issues
Welcoming Tier
7
S & A Tier maintainers
Ranked Starlark Repositories
Showing top 33 of 33 ranked repositories
| Rank | Repository | Tier | Score | Merge Rate | Good First Issues |
|---|---|---|---|---|---|
| #1 | Scala rules for Bazel | A•Welcoming | 67.0 | 76.5% | - |
| #2 | LLVM toolchain for bazel | A•Welcoming | 66.1 | 85.7% | - |
| #3 | Homomorphic Encryption demos | B•Solid | 66.0 | 86.7% | - |
| #4 | Bazel rules for Kotlin | A•Welcoming | 64.6 | 80.6% | - |
| #5 | 🥑 Language focused docker images, minus the operating system. | A•Welcoming | 61.9 | 66.7% | - |
| #6 | High-performance Bazel rules for running Node.js tools and building JavaScript projects | A•Welcoming | 61.9 | 71.0% | - |
| #7 | Score project main repository | A•Welcoming | 59.0 | 64.0% | - |
| #8 | Starlark implementation of bazel rules for CUDA. | A•Welcoming | 58.2 | 54.5% | - |
| #9 | Run static analysis tools with Bazel | B•Solid | 54.7 | 52.6% | - |
| #10 | A zero sysroot, fully hermetic C/C++ cross compilation toolchain for Bazel based on LLVM. | B•Solid | 53.9 | 52.2% | - |
| #11 | Collection of utilities and Bazel rules to aid in the development and maintenance of Swift repositories using Bazel. | B•Solid | 51.9 | 50.0% | - |
| #12 | { Correct, Fast, Usable } -- Choose three | B•Solid | 51.9 | 100.0% | - |
| #13 | Bazel Python Rules | B•Solid | 51.6 | 11.1% | 7 |
| #14 | More compatible Bazel rules for running Python tools and building Python projects | B•Solid | 51.1 | 25.0% | - |
| #15 | Rules for importing Nixpkgs packages into Bazel. | B•Solid | 50.6 | 57.1% | - |
| #16 | The central registry of Bazel modules for the Bzlmod external dependency system. | B•Solid | 48.4 | 23.8% | - |
| #17 | Bazel rules for the `tsc` compiler from http://typescriptlang.org | C•Moderate | 37.6 | 0.0% | - |
| #18 | Java rules for Bazel | D•Risky | 29.9 | 0.0% | - |
| #19 | C++ Rules for Bazel | D•Risky | 25.7 | 0.0% | - |
| #20 | Public interface definitions of Google APIs. | D•Risky | 8.0 | 0.0% | - |
| #21 | Bazel rules to build Swift on Apple and Linux platforms | D•Risky | 8.0 | 0.0% | - |
| #22 | Rust rules for Bazel | D•Risky | 0.0 | 0.0% | - |
| #23 | Bazel rules to build apps for Apple platforms. | D•Risky | 0.0 | 0.0% | - |
| #24 | Executable GenAI prompt templates | D•Risky | 0.0 | 0.0% | - |
| #25 | A Kurtosis package that deploys a private, portable, and modular Ethereum devnet | D•Risky | 0.0 | 0.0% | - |
| #26 | Docker image for ownCloud community edition | D•Risky | 0.0 | 0.0% | - |
| #27 | Haskell rules for Bazel. | D•Risky | 0.0 | 0.0% | - |
| #28 | Bazel rules for creating packages of many types (zip, tar, deb, rpm, ...) | D•Risky | 0.0 | 0.0% | - |
| #29 | gRPC Network Operations Interface (gNOI) defines a set of gRPC-based microservices for executing operational commands on network devices. | D•Risky | 0.0 | 0.0% | - |
| #30 | Constraint values for specifying platforms and toolchains | D•Risky | 0.0 | 0.0% | - |
| #31 | Bazel rules for running multiple commands in parallel in a single bazel invocation | D•Risky | 0.0 | 0.0% | - |
| #32 | Apple support for Bazel rules | D•Risky | 0.0 | 0.0% | - |
| #33 | Bazel rules to construct images using https://github.com/GoogleContainerTools/distroless | D•Risky | 0.0 | 0.0% | - |
How to Get Your Starlark PR Merged
1
Check C-Rankâ„¢ First: Pick projects with S or A tiers to avoid maintainer ghosts and slow review cycles.
2
Run Local Verification: Ensure test suites and formatting linters pass before opening a pull request.
3
Submit in Maintainer Windows: Check the repository report card to submit when maintainers are most active.
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Frequently Asked Questions: Starlark Open Source
What is the most welcoming Starlark open-source repository?
The highest-ranked Starlark repository on GetMerged is currently bazel-contrib/rules_scala, with a C-Rank score of 67.0/100 and a 76.5% PR merge rate.
How can I find good first issues in Starlark?
You can browse verified beginner-friendly issues in Starlark by visiting our curated Good First Issues directory at getmerged.abhishekco.de/good-first-issue/starlark.
What makes a Starlark repository ‘Super Welcoming’ on GetMerged?
A ‘Super Welcoming’ (S-Tier) Starlark repository demonstrates an external PR merge rate above 80%, a median first response time within 24 to 48 hours, active review feedback, and clear onboarding documentation.