feat(Infra) if a file was moved, ensure there is a redirect

[sergical]

DESCRIBE YOUR PR

Problem

When MDX files are renamed or moved, contributors sometimes forget to add corresponding redirects to redirects.js, causing broken links for old URLs.

Solution

Added a GitHub Action workflow that automatically detects MDX file renames in PRs and checks if the necessary redirects exist in redirects.js. If redirects are missing, it posts a warning comment on the PR with code snippets showing exactly what redirects to add.

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SLA

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• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it. Thanks in advance for your help!

PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• [ ] Checked Vercel preview for correctness, including links
• [ ] PR was reviewed and approved by any necessary SMEs (subject matter experts)
• [ ] PR was reviewed and approved by a member of the Sentry docs team

LEGAL BOILERPLATE

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EXTRA RESOURCES

• Sentry Docs contributor guide

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ready	Preview	Comment	Nov 4, 2025 9:01pm
sentry-docs	Ready	Preview	Comment	Nov 4, 2025 9:01pm

[codecov[bot]]

Bundle Report

Changes will increase total bundle size by 6.78kB (0.03%) :arrow_up:. This is within the configured threshold :white_check_mark:

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	10.16MB	-6 bytes (-0.0%) :arrow_down:
sentry-docs-server-cjs	12.85MB	6.78kB (0.05%) :arrow_up:

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
static/0n7dY6mdA38xM1nZ3pRY_/_buildManifest.js (New)	684 bytes	684 bytes	100.0% :rocket:
static/0n7dY6mdA38xM1nZ3pRY_/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% :rocket:
~~static/UsUQQxHGmYSA7AWawkYFs/_buildManifest.js~~ (Deleted)	-684 bytes	0 bytes	-100.0% :wastebasket:
~~static/UsUQQxHGmYSA7AWawkYFs/_ssgManifest.js~~ (Deleted)	-77 bytes	0 bytes	-100.0% :wastebasket:

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.74MB	-0.0%
../instrumentation.js	-3 bytes	1.07MB	-0.0%
9523.js	-3 bytes	1.04MB	-0.0%
../app/[[...path]]/page.js.nft.json	2.26kB	849.9kB	0.27%
../app/platform-redirect/page.js.nft.json	2.26kB	849.82kB	0.27%
../app/sitemap.xml/route.js.nft.json	2.26kB	847.05kB	0.27%

[github-actions[bot]]

⚠️ Missing Redirects Detected

This PR renames or moves MDX files, but some redirects may be missing from redirects.js.

Please add the following redirects to ensure old URLs continue to work:

Developer Docs Redirects (developerDocsRedirects array)

  {
    source: '/development-infrastructure/testing/',
    destination: '/development-infrastructure/testing-new/',
  },

---

Note: This check will fail until redirects are added. Adding redirects ensures old links continue to work.

[coolguyzone]

What's the best way to verify that this works? Is it worth including some tests?

[sergical]

@coolguyzone

yeah there is a scripts/check-redirects-on-rename.spec.ts and i tested manually by changing renaming a file and it triggered a comment, not sure how else to test, open to suggestions!