diff --git a/.github/workflows/validate-github-github-docs-urls.yml b/.github/workflows/validate-github-github-docs-urls.yml
index cbf03d3a1a..7092d8565c 100644
--- a/.github/workflows/validate-github-github-docs-urls.yml
+++ b/.github/workflows/validate-github-github-docs-urls.yml
@@ -8,7 +8,15 @@ on:
   workflow_dispatch:
   schedule:
     - cron: '20 16 * * *' # Run every day at 16:20 UTC / 8:20 PST
-  # pull_request: # Temporarily commented out. See internal issue 4152
+  pull_request:
+    paths:
+      - 'content/**'
+      # In case a relevant dependency changes
+      - 'package*.json'
+      # The scripts
+      - 'src/links/scripts/validate-github-github-docs-urls/**'
+      # The workflow
+      - .github/workflows/validate-github-github-docs-urls.yml
 
 permissions:
   contents: read
@@ -90,13 +98,28 @@ jobs:
       # In the latter case, you might want to update the URL in docs-urls.json
       # after this PR has landed, or consider using `<a name="..."></a>` as a
       # workaround for the time being.
+      # First, gather the URLs that were relevant
+      - name: Get changed content/data files
+        id: changed-files
+        uses: tj-actions/changed-files@77af4bed286740ef1a6387dc4e4e4dec39f96054 # v43.0.0
+        with:
+          # No need to escape the file names because we make the output of
+          # tj-actions/changed-files be set as an environment variable. Not
+          # as a direct input to the line of bash that uses it.
+          safe_output: false
+          files: |
+            content/**
       - name: Generate PR comment
-        if: ${{ github.event_name == 'pull_request' }}
+        if: ${{ github.event_name == 'pull_request' && steps.changed-files.outputs.any_changed == 'true' }}
         env:
+          # Make it an environment variable so that its value doesn't need to be escaped.
+          # See https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
+          CHANGED_FILES: |-
+            ${{ steps.changed-files.outputs.all_changed_files }}
           GITHUB_TOKEN: ${{ secrets.DOCS_BOT_PAT_WRITEORG_PROJECT }}
           ISSUE_NUMBER: ${{ github.event.pull_request.number }}
           REPOSITORY: ${{ github.repository }}
-        run: npm run validate-github-github-docs-urls -- post-pr-comment checks.json
+        run: npm run validate-github-github-docs-urls -- post-pr-comment checks.json --changed-files $CHANGED_FILES
 
       - uses: ./.github/actions/slack-alert
         if: ${{ failure() && github.event_name == 'schedule' }}
diff --git a/src/links/scripts/validate-github-github-docs-urls/index.ts b/src/links/scripts/validate-github-github-docs-urls/index.ts
index af1da7f3f9..79cac3a2aa 100644
--- a/src/links/scripts/validate-github-github-docs-urls/index.ts
+++ b/src/links/scripts/validate-github-github-docs-urls/index.ts
@@ -32,6 +32,11 @@ program
   )
   .option('--dry-run', "Don't post any comment. Only print what it would post.")
   .option('--fail-on-error', 'Any error will make the process exit with a non-zero code')
+  .option(
+    '--changed-files [paths...]',
+    'Content files that we can map to URLs for inclusion',
+    process.env.CHANGED_FILES || '',
+  )
   .argument('<checks-json-filepath>', 'JSON file that has all checks')
   .action(postPRComment)
 
diff --git a/src/links/scripts/validate-github-github-docs-urls/post-pr-comment.ts b/src/links/scripts/validate-github-github-docs-urls/post-pr-comment.ts
index cd8c88e74e..0baf13af9b 100644
--- a/src/links/scripts/validate-github-github-docs-urls/post-pr-comment.ts
+++ b/src/links/scripts/validate-github-github-docs-urls/post-pr-comment.ts
@@ -11,6 +11,13 @@ type PostPRCommentOptions = {
   repository: string
   dryRun: boolean
   failOnError?: boolean
+  // If someone uses ` ... --changed-files`, Commander will set this to
+  // boolean `true`.
+  // If someone uses ` ... --changed-files foo bar`, the value
+  // becomes `['foo', 'bar']`.
+  // And since it defaults to an env var called `CHANGED_FILES`,
+  // it could be a string like `'foo bar'`.
+  changedFiles?: string | string[] | true
 }
 
 // This function is designed to be able to run and potentially do nothing.
@@ -19,25 +26,59 @@ export async function postPRComment(filePath: string, options: PostPRCommentOpti
   if (!options.dryRun) {
     if (!options.issueNumber) {
       throw new Error(
-        'You must provide an issue number. Either set ISSUE_NUMBER env var or pass the --issue-number flag. Remember, a PR is an issue actually.',
+        'If not in dry-run mode, you must provide an issue number. Either set ISSUE_NUMBER env var or pass the --issue-number flag. Remember, a PR is an issue actually.',
       )
     }
     if (!options.repository) {
       throw new Error(
-        'You must provide a repository name. Either set REPOSITORY env var or pass the --repository flag.',
+        'If not in dry-run mode, you must provide a repository name. Either set REPOSITORY env var or pass the --repository flag.',
       )
     }
   }
 
+  // See note on `PostPRCommentOptions` type about this
+  if (options.changedFiles === true) {
+    throw new Error(
+      'If you use --changed-files, you must provide at least one file path. For example, --changed-files foo.md bar.md',
+    )
+  }
+
   // Exit early if there's absolutely nothing to "complain" about
   const checks: Check[] = JSON.parse(fs.readFileSync(filePath, 'utf8'))
 
+  const changedFiles: string[] = []
+  if (options.changedFiles) {
+    if (Array.isArray(options.changedFiles)) {
+      changedFiles.push(...options.changedFiles)
+    } else if (typeof options.changedFiles === 'string') {
+      changedFiles.push(...options.changedFiles.split(/\s+/g))
+    } else {
+      throw new Error('Unexpected type for changedFiles')
+    }
+  }
+
+  const checksFiltered = checks.filter((check: Check) => {
+    return (
+      !changedFiles.length ||
+      changedFiles.some((changedFile) => contentFileMatchesURL(changedFile, check.url))
+    )
+  })
+
+  if (checksFiltered.length !== checks.length && checks.length > 0) {
+    console.warn(
+      boxen(
+        `Due to filtering by changed files (${changedFiles.length}) there are now ${checksFiltered.length} checks to process instead of ${checks.length}.`,
+        { padding: 1 },
+      ),
+    )
+  }
+
   // Really bad. This could lead to a 404 from links in GitHub.
-  const failedChecks = checks.filter((check) => !check.found)
+  const failedChecks = checksFiltered.filter((check) => !check.found)
 
   // Bad. This could lead to the fragment not finding the right
   // heading in the found page.
-  const failedFragmentChecks = checks.filter(
+  const failedFragmentChecks = checksFiltered.filter(
     (check) => check.found && check.fragment && !check.fragmentFound,
   )
 
@@ -143,6 +184,16 @@ Remember, this workflow check is not required because it's not guaranteed to be
   }
 }
 
+function contentFileMatchesURL(filePath: string, url: string) {
+  if (!filePath.startsWith('content/')) return false
+
+  // This strips and omits any query string or hash
+  const pathname = new URL(url, 'https://docs.github.com').pathname
+
+  const fileUrl = filePath.replace('content', '').replace('/index.md', '').replace(/\.md$/, '')
+  return pathname === fileUrl
+}
+
 function makeAbsoluteDocsURL(check: Check) {
   let absURL = `https://docs.github.com${check.pageURL}`
   if (check.fragment) {