diff --git a/.github/workflows/clean-pending-reports.yml b/.github/workflows/clean-pending-reports.yml
new file mode 100644
index 00000000..7887f0b3
--- /dev/null
+++ b/.github/workflows/clean-pending-reports.yml
@@ -0,0 +1,29 @@
+name: Close potentially outdated report pull requests
+
+on:
+  schedule:
+    - cron: '30 4 * * *'
+  workflow_dispatch:
+jobs:
+  clean:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Setup node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+    - name: Checkout strudy
+      uses: actions/checkout@v4
+    - name: Install dependencies
+      run: |
+        npm ci
+    - name: Checkout webref
+      uses: actions/checkout@v4
+      with:
+        repository: w3c/webref
+        path: webref
+    - name: Close pull requests if needed
+      run: node src/reporting/clean-pending-regeneration.js webref/ed/
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
diff --git a/src/reporting/clean-pending-regeneration.js b/src/reporting/clean-pending-regeneration.js
new file mode 100644
index 00000000..0f01c253
--- /dev/null
+++ b/src/reporting/clean-pending-regeneration.js
@@ -0,0 +1,128 @@
+/**
+ * Check GitHub pull requests labeled "pending-spec-regeneration"
+ * and close them if the relevant spec has been regenerated
+ * since the PR was created.
+ */
+
+const core = require('@actions/core');
+const Octokit = require('../lib/octokit');
+const fs = require('fs');
+const path = require('path');
+const matter = require('gray-matter');
+const { loadCrawlResults } = require('../lib/util');
+
+const owner = 'w3c';
+const repo = 'strudy';
+
+
+
+/**
+ * Check GitHub issues and PR referenced by patch files and drop patch files
+ * that only reference closed issues and PR.
+ *
+ * @function
+ * @return {String} A GitHub flavored markdown string that describes what
+ *   patches got dropped and why. To be used in a possible PR. Returns an
+ *   empty string when there are no patches to drop.
+ */
+async function dropPendingReportsWhenPossible (edCrawlResultsPath) {
+  // Find PRs labeled pending-spec-regenetation
+  const { data: issues } = (await octokit.rest.issues.listForRepo({
+    owner,
+    repo,
+    labels: "pending-spec-regeneration"
+  }));
+
+  const pull_requests = issues.filter(i => i.pull_request);
+  if (!pull_requests.length) {
+    console.log("No open pull requests labeled pending-spec-regeneration");
+    return [];
+  }
+  const crawl = await loadCrawlResults(edCrawlResultsPath);
+
+  const dropped = [];
+  for (const pr of pull_requests) {
+    // find relevant spec URL from issue body (the first markdown link there)
+    const m = pr.body.match(/\]\(([^\)]+)\)/);
+    if (!m) {
+      console.error(`Could not find link to spec in body of PR ${pr.number}, aborting`);
+      continue;
+    }
+    const url = m[1];
+    const spec = crawl.ed.find(s => s.nightly?.url === url);
+    if (!spec) {
+      console.error(`Could not find ${url} in webref crawl data, aborting`);
+      continue;
+    }
+    const lastModified = new Date(spec.crawlCacheInfo.lastModified);
+    // check if the last modified date in webref is later than the PR creation
+    if (lastModified.toJSON() > pr.created_at) {
+      console.log(`PR ${pr.number} may no longer be relevant, closing it`);
+      // if it is, delete the branch, and close the PR
+      const prData = await octokit.rest.pulls.get({
+	owner,
+	repo,
+	pull_number: pr.number
+      });
+      await octokit.rest.git.deleteRef({
+	owner,
+	repo,
+	ref: prData.head.ref
+      });
+      await octokit.rest.issues.update({
+	owner,
+	repo,
+	issue_number: pr.number,
+	state: "closed"
+      });
+      dropped.push(pr.pull_request.html_url);
+    }
+  }
+  return dropped;
+}
+
+/*******************************************************************************
+Retrieve GH_TOKEN from environment, prepare Octokit and kick things off
+*******************************************************************************/
+const GH_TOKEN = (() => {
+  try {
+    return require('../../config.json').GH_TOKEN;
+  } catch {
+    return process.env.GH_TOKEN;
+  }
+})();
+if (!GH_TOKEN) {
+  console.error('GH_TOKEN must be set to some personal access token as an env variable or in a config.json file');
+  process.exit(1);
+}
+
+const octokit = new Octokit({
+  auth: GH_TOKEN
+  // log: console
+});
+
+let edCrawlResultsPath = process.argv[2];
+
+if (!edCrawlResultsPath) {
+  console.error('Path to the webref crawl of editors draft needs to be provided as argument');
+  process.exit(1);
+}
+
+// Target the index file if needed
+if (!edCrawlResultsPath.endsWith('index.json')) {
+  edCrawlResultsPath = path.join(edCrawlResultsPath, 'index.json');
+}
+
+
+dropPendingReportsWhenPossible(edCrawlResultsPath)
+  .then(res => {
+    core.exportVariable('dropped_reports', res);
+    console.log();
+    console.log('Set dropped_reports env variable');
+    console.log(res);
+    console.log('== The end ==');
+  })
+  .catch(err => {
+    console.error(err);
+    process.exit(1);
+  });