diff --git a/.github/workflows/lint-404s.yml b/.github/workflows/lint-404s.yml
new file mode 100644
index 0000000000000..8676d166cc9dd
--- /dev/null
+++ b/.github/workflows/lint-404s.yml
@@ -0,0 +1,53 @@
+name: Lint Docs for 404s
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  index:
+    name: Update Algolia index
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: getsentry/action-setup-volta@c52be2ea13cfdc084edb806e81958c13e445941e # v1.2.0
+      - uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          filters: |
+            docs:
+              - 'docs/**'
+              - 'includes/**'
+              - 'platform-includes/**'
+            dev-docs:
+              - 'develop-docs/**'
+      - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+
+      - uses: actions/cache@v4
+        id: cache
+        with:
+          path: ${{ github.workspace }}/node_modules
+          key: node-${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
+
+      - run: yarn install --frozen-lockfile
+        if: steps.cache.outputs.cache-hit != 'true'
+
+      # Remove the changelog directory to avoid a build error due to missing `DATABASE_URL`
+      # and save some build time.
+      - run: rm -r app/changelog
+
+      - run: yarn build
+        if: steps.filter.outputs.docs == 'true'
+
+      - run: yarn build:developer-docs
+        if: steps.filter.outputs.dev-docs == 'true'
+
+      # bun seems to be the most straightforward way to run a TypeScript script
+      # without introducing another dependency like ts-node or tsx for everyone else
+
+      # build docs index
+      - run: bun ./scripts/lint-404s.ts