diff --git a/authoring_server.py b/authoring_server.py
index 28b4ca8..ebfd007 100755
--- a/authoring_server.py
+++ b/authoring_server.py
@@ -397,6 +397,18 @@ def page_to_dict(page: ContentPage) -> dict[str, Any]:
     }
 
 
+def server_diagnostics() -> dict[str, Any]:
+    pages = list_pages()
+    return {
+        "root": ROOT.as_posix(),
+        "cwd": Path.cwd().as_posix(),
+        "executable": sys.executable,
+        "pid": os.getpid(),
+        "pageCount": len(pages),
+        "firstPage": pages[0]["path"] if pages else "",
+    }
+
+
 def list_pages() -> list[dict[str, Any]]:
     pages = []
     org_paths = []
@@ -1355,6 +1367,12 @@ class Handler(BaseHTTPRequestHandler):
             except Exception as exc:
                 self.send_json({"error": str(exc)}, HTTPStatus.INTERNAL_SERVER_ERROR)
             return
+        if parsed.path == "/api/diagnostics":
+            try:
+                self.send_json(server_diagnostics())
+            except Exception as exc:
+                self.send_json({"error": str(exc)}, HTTPStatus.INTERNAL_SERVER_ERROR)
+            return
         if parsed.path == "/api/page":
             query = parse_qs(parsed.query)
             try:
@@ -1408,8 +1426,12 @@ class Handler(BaseHTTPRequestHandler):
 def main() -> None:
     port = int(os.environ.get("AUTHOR_PORT", "8765"))
     server = ThreadingHTTPServer(("127.0.0.1", port), Handler)
+    page_count = len(list_pages())
     print(f"Authoring UI running at http://127.0.0.1:{port}")
     print(f"Content root: {ROOT}")
+    print(f"Editable pages: {page_count}")
+    if page_count == 0:
+        print("WARNING: no editable pages were found. Check AUTHOR_ROOT and the launch directory.")
     print("Press Ctrl-C to stop.")
     try:
         server.serve_forever()
diff --git a/posts/posts-list.org b/posts/posts-list.org
index cc49ae4..4319789 100755
--- a/posts/posts-list.org
+++ b/posts/posts-list.org
@@ -4,7 +4,7 @@
 See the categories: @@html:<a href="../home/categories.html">Categories</a>@@
 
 * Posts:
-- [[file:career/career-list.org][Career List]] @@html:<span class="post-date">07-05-2026 16:35</span>@@ 
+- [[file:career/career-list.org][Career List]] @@html:<span class="post-date">07-05-2026 16:45</span>@@ 
 - [[file:posts-list.sync-conflict-20260417-233432-VT6366A.org][Posts List]] @@html:<span class="post-date">14-04-2026 16:36</span>@@ 
 - [[file:career/ha-dr.org][High Availability, Disaster Recovery and Business Continuity]] @@html:<span class="post-date">11-03-2026 17:18</span>@@ @@html:<a href="/tags/learning.html"><span class="post-tag">learning</span></a>@@ @@html:<a href="/tags/notes.html"><span class="post-tag">notes</span></a>@@
 - [[file:career/javascript.org][Understands the Javascript language]] @@html:<span class="post-date">11-03-2026 16:52</span>@@ @@html:<a href="/tags/learning.html"><span class="post-tag">learning</span></a>@@ @@html:<a href="/tags/notes.html"><span class="post-tag">notes</span></a>@@
diff --git a/sitemap.org b/sitemap.org
index a3e59e4..2789160 100755
--- a/sitemap.org
+++ b/sitemap.org
@@ -11,12 +11,12 @@
   - [[file:tags/notes.org][Tag: notes]]
   - [[file:tags/review.org][Tag: review]]
   - [[file:tags/website.org][Tag: website]]
+  - [[file:tags/update.org][Tag: update]]
   - [[file:tags/life.org][Tag: life]]
   - [[file:tags/education.org][Tag: education]]
-  - [[file:tags/update.org][Tag: update]]
   - [[file:tags/insights.org][Tag: insights]]
-  - [[file:tags/emacs.org][Tag: emacs]]
   - [[file:tags/reading.org][Tag: reading]]
+  - [[file:tags/emacs.org][Tag: emacs]]
   - [[file:tags/maths.org][Tag: maths]]
 - home
   - [[file:home/countdown.org][Countdown]]
diff --git a/tests/test_authoring_server.py b/tests/test_authoring_server.py
index b75b532..fe11075 100755
--- a/tests/test_authoring_server.py
+++ b/tests/test_authoring_server.py
@@ -198,6 +198,15 @@ class PageRenderingTests(AuthoringServerTestCase):
 
         self.assertEqual(paths, ["blogs/keep.org"])
 
+    def test_server_diagnostics_reports_root_and_page_count(self):
+        (self.blogs / "keep.org").write_text("#+TITLE: Keep\n#+DATE: <2026-05-07 Thu 12:00>\n", encoding="utf-8")
+
+        diagnostics = server.server_diagnostics()
+
+        self.assertEqual(diagnostics["root"], self.root.as_posix())
+        self.assertEqual(diagnostics["pageCount"], 1)
+        self.assertEqual(diagnostics["firstPage"], "blogs/keep.org")
+
     def test_relative_asset_path_is_calculated_from_lima_page_directory(self):
         self.assertEqual(
             server.relative_asset_path("lima/family/update.md", "assets/images/hzone/pic.png"),