[FEAT] Add GitHub pull request review metrics — reviews given vs received

[Priyanshu-byte-coder]

Summary

PRMetrics focuses on PRs authored by the user. But code review is equally important — how many PRs has the user reviewed? How many reviews have they given? This shows a fuller picture of contribution.

Expected Behaviour

New 'Reviews Given' section in PRMetrics:

• Total reviews given (this period)
• Approval rate (approvals / total reviews)
• Average time to first review comment
• Most reviewed repos

Implementation Notes

• GitHub GraphQL: viewer.contributionsCollection.pullRequestReviewContributions
• Add to existing /api/metrics/prs route or create /api/metrics/reviews
• Display alongside existing PR stats (same card, tabbed or expanded section)

GSSoC Info

• Difficulty: Intermediate — 35 pts
• Area: Feature / Metrics

[srinidhi-2006-bit]

Hi @Priyanshu-byte-coder

I’m contributing under GSSoC’26 and I would like to work on this issue.

I understand that the feature involves extending PRMetrics to include pull request review analytics such as total reviews given, approval rate, review timing metrics, and repository-level review insights using GitHub GraphQL contribution data. I’ll ensure the implementation integrates smoothly with the existing metrics architecture while maintaining clean data handling and efficient API usage.

I’ll also carefully structure the UI additions so the new review metrics remain clear, organized, and consistent with the current dashboard experience.

Looking forward to contributing to DevTrack.

[PalakSingh-hash]

Hi @Priyanshu-byte-coder,
I’d like to work on this issue under GSSoC. I can implement the new “Reviews Given” metrics section using GitHub GraphQL, including review counts, approval rate, average review time, and top repos.

Please assign this issue to me under GSSoC'26. I’ll follow the existing structure and ensure clean integration with the current PRMetrics dashboard.

[Visaka123]

Hi @Priyanshu-byte-coder, I’d love to work on this GSSoC'26 intermediate issue (35 pts).

As an Amazon SDE Intern, I will fetch pullRequestReviewContributions via GitHub GraphQL to build the new "Reviews Given" section.

Could you please assign this to me for a clean integration into the /api/metrics/ route and dashboard?

[Nikkiraj4]

Hi @Priyanshu-byte-coder!

I'd love to work on this issue as part of GSSoC'26!

My Approach:

API Layer

• Use GitHub GraphQL viewer.contributionsCollection.pullRequestReviewContributions to fetch review data
• Add a new /api/metrics/reviews route (or extend existing /api/metrics/prs)
• Calculate: total reviews, approval rate, avg time to first review

Frontend

• Add a 'Reviews Given' section inside the existing PRMetrics card
• Use a tabbed layout (PRs Authored | Reviews Given) to keep UI clean
• Display: total reviews, approval %, most reviewed repos

Data Points to Track

• totalCount of review contributions
• Filter by APPROVED, CHANGES_REQUESTED, COMMENTED states
• Group by repository for 'Most Reviewed Repos'

I have already looked at the existing codebase structure and the current PRMetrics implementation. I'm confident I can deliver a clean, well-tested solution.

Could you please assign this issue to me? I'll open a draft PR soon after assignment.

/assign gssoc26

[mallya-m]

Hi @Priyanshu-byte-coder!
I've been contributing actively to this repo
(#303 merged, #305/#306/#411 in review) and I'd love to work on this.

My approach:

• Use GitHub GraphQL viewer.contributionsCollection
  .pullRequestReviewContributions to fetch review data
• Extend existing /api/metrics/prs route to include review stats
  (avoids a separate API call on the frontend)
• Add a tabbed layout inside the existing PRMetrics card:
  "PRs Authored" | "Reviews Given" — keeps the UI clean without
  adding a new widget
• Track: total reviews, approval rate (APPROVED / total),
  avg time to first review comment, top reviewed repos

Could you also assign this to me?
GitHub: github.com/mallya-m