diff --git a/.github/workflows/doc.yaml b/.github/workflows/doc.yaml
index e2211f74..2ca123f9 100644
--- a/.github/workflows/doc.yaml
+++ b/.github/workflows/doc.yaml
@@ -17,5 +17,7 @@ jobs:
           python-version: 3.12
       - name: Install dependencies
         run: pip install --requirement=etc/requirements.txt
+      - name: Build documentation
+        run: npx gulp doc
       - name: Deploy documentation
         run: mkdocs gh-deploy --config-file=etc/mkdocs.yaml --force
diff --git a/gulpfile.js b/gulpfile.js
index fe8fdf9f..fa1f641c 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -36,6 +36,12 @@ export async function publish() {
 	for (const action of [["tag"], ["push", "origin"]]) await $`git ${action} v${pkg.version}`;
 }
 
+// Starts the development server.
+export async function serve() {
+	await doc();
+	return $({stdio: "inherit"})`mkdocs serve --config-file=etc/mkdocs.yaml`;
+}
+
 // Runs the test suite.
 export async function test() {
 	await build();