What does the 47.6 C-Rank™ score (B Tier) represent?

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 47.6 places MattiasBuelens/web-streams-polyfill in the B tier.

Are there Good First Issues available in MattiasBuelens/web-streams-polyfill?

MattiasBuelens/web-streams-polyfill does not currently have active "good first issue" tags indexed, but accepts external contributions through standard GitHub issue tracking.

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MattiasBuelens/web-streams-polyfill

Q: How fast can I expect code review feedback on my pull request?

Maintainers in MattiasBuelens/web-streams-polyfill 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.

Q: What is the external contributor pull request merge rate for MattiasBuelens/web-streams-polyfill?

The external contributor pull request merge rate for MattiasBuelens/web-streams-polyfill is 100.0%, based on public PR activity from non-core contributors.

336

Active (30d)B•Solid(48/100)Low Sample (<20 PRs)TypeScript

Web Streams, based on the WHATWG spec reference implementation

GitHub

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AI Maintainer Review Guidelines

Review Persona

Empathetic Technical Mentor

Warmth Score

7.5/10

Patience Score

8.2/10

Nitpick Rate

20%

Collaborative maintainer environment in MattiasBuelens/web-streams-polyfill. Reviews community pull requests with focus on project quality.

What Contributors Actually Say

Discussions in MattiasBuelens/web-streams-polyfill focus heavily on practical implementation feedback, code formatting standards, and issue reproduction details.

Hidden Friction Signals

Unlinked PRs without issue context and changes that fail automated test suites face the highest review friction.

Unwritten Rules

•1) Keep PR scope strictly aligned with the linked issue.
•2) Ensure local linters pass before opening a review.
•3) Maintain full test coverage for modified logic.

Top PR Submission Do's

•Ensure code complies with the project coding style
•Keep PRs scoped to a single concern
•Include context and link to the related issue

Top PR Friction Pitfalls (Don'ts)

•Do not submit PRs without linking an issue
•Do not break existing tests without fixing them
•Do not mix unrelated refactors in a single PR

Response Velocity

No reviewer activity recorded

Average Response Latency

Tracks hours until a maintainer leaves a review, comment, or PR response.

Merge Efficiency

100.0%

High acceptance rate for external PRs

External Acceptance Rate

Percentage of community pull requests successfully merged into main.

First-Timer Success

0.0%

No first-timer merges recorded in window

First PR Conversion

Rate at which developers submitting their first repository PR succeed.

Active Maintainers

CRITICAL BUS FACTOR

Single maintainer

No active GitHub maintainers found (may review internally on Gerrit or internal tools)

Diagnostic Health HUD

100.0%

Merge Gauge

0.0%

1st-Timer

Community Vibe40/100

Embed C-Rank Badge

Show contributors that your repository actively reviews and merges external pull requests.

[![GetMerged C-Rank](https://getmerged.abhishekco.de/api/badge/MattiasBuelens/web-streams-polyfill)](https://getmerged.abhishekco.de/MattiasBuelens/web-streams-polyfill?utm_source=github&utm_medium=badge)

90-Day C-Rank Trajectory

3 snapshots

Historical health & responsiveness evolution

45.0/100B

Sep 12

-11.5

Sep 1Range: 45.0 – 56.4 ptsSep 12

PR Acceptance & Review Speed Forecast

Precomputed via Live PR Events

Overall Merge Odds

100.0%

External PR acceptance

First-Timer Rate

N/A

First PR success rate

Median Response (p50)

N/A

50% receive response in

Tail Latency (p90)

N/A

90% receive response in

Active Maintainers: 0

Optimal PR Submission Window

Maintainer review activity heatmap & prime window prediction

Tuesday - ThursdayLimited Sample Size

Peak Review Hour

10:00 UTC

Calculating local time...

Primary Window

07:00 - 11:00 UTC

Calculating local time...

Active Maintainers

3 Tracked

Detected: UTC

24-Hour Maintainer Activity Heatmap (UTC)

LowPeak

00:0006:0012:0018:0023:00

Maintainers are most responsive around 10:00 UTC (10:00 UTC in your timezone). Recommended submission window is Tuesday - Thursday from 07:00 to 11:00 UTC (07:00 - 11:00 UTC local).

PR Size vs Review Speed

Best Pull Request Size for MattiasBuelens/web-streams-polyfill

Sweet Spot: < 150 lines

Small (<150 LOC)Recommended

16havg review

96% Merge Approval

Medium (150–500 LOC)Normal

1.5davg review

95% Merge Approval

Large (>500 LOC)Slow

4.8davg review

45% Merge Approval

Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~16 hours (96% approval). Large PRs (>500 lines) take ~115 hours (45% approval). Keep your diff compact for rapid review.

Active Good First Issues (0)

View on GitHub

No cached good first issues currently tracked for MattiasBuelens/web-streams-polyfill.

View all good first issues directly on GitHub

Looking for more TypeScript beginner tasks?Explore TypeScript GFI

Contributor Community Vibe Feedback

Rate what actually matters after opening a pull request here.

Have you contributed to this repo?

Rate your first-hand PR experience (review speed, maintainer responsiveness, and onboarding ease) to help other contributors.

3 ratings required

Maintainer helpfulness

Review speed

Beginner friendliness

Contributor Compatibility & Review Speed Analysis for MattiasBuelens/web-streams-polyfill

When evaluating whether to contribute to MattiasBuelens/web-streams-polyfill, 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 MattiasBuelens/web-streams-polyfill acknowledge new external contributions in approximately -. Out of all submitted pull requests from non-core authors in the last 180-day window, 100.0% were successfully merged into the primary branch.

Frequently Asked Questions - Contributing to MattiasBuelens/web-streams-polyfill

Is MattiasBuelens/web-streams-polyfill welcoming to first-time open-source contributors?

MattiasBuelens/web-streams-polyfill has a recorded first-timer success rate of 0.0%. Repositories ranked Solid typically provide actionable feedback during code reviews and actively nurture new community contributors.

How fast can I expect code review feedback on my pull request?

The initial maintainer response time averages ~-. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.

What does the 47.6 C-Rank™ score represent?

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 47.6 places MattiasBuelens/web-streams-polyfill in the Solid tier.

What is the external contributor pull request merge rate for MattiasBuelens/web-streams-polyfill?

The external pull request merge rate is 100.0%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.

Are there beginner Good First Issues open in MattiasBuelens/web-streams-polyfill?

MattiasBuelens/web-streams-polyfill does not have open beginner labels indexed currently, but external PRs for bugs and documentation improvements are evaluated via normal issue triage.

GetMerged C-Rank™ Indexing Standard

All metrics displayed for MattiasBuelens/web-streams-polyfill 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.