diff --git a/web/dev/index.html b/web/dev/index.html
index 8d66993d..4f22b11a 100644
--- a/web/dev/index.html
+++ b/web/dev/index.html
@@ -2,7 +2,8 @@
 <!--
   The canvas with the invented population and the replayed corpus loaded:
   `dev/#mock` and `dev/#corpus`. It reads ../index.html, points its relative
-  links back up a directory, and adds the two dev scripts before live.js, so
+  links back up a directory, and adds the dev scripts (the mock, the corpus and the mock's local
+  clustering) before live.js, so
   the live page stays the one copy. Release archives leave web/dev/ out.
 -->
 <html lang="en">
@@ -21,6 +22,7 @@
               '<script src="../live.js">',
               '<script src="mock.js"><\/script>' +
                 '<script src="corpus.js"><\/script>' +
+                '<script src="../work.js"><\/script>' +
                 '<script src="../live.js">',
             );
           document.open();
diff --git a/web/graph/feed.js b/web/graph/feed.js
index 9700b978..34641842 100644
--- a/web/graph/feed.js
+++ b/web/graph/feed.js
@@ -523,7 +523,7 @@ function addScrobble(event, live) {
     written: event.written,
   });
   // Only the mock's page clusters locally; a live page is told its groups.
-  if (!living) workIndex.observe(agent.did, event.text);
+  if (!living && workIndex) workIndex.observe(agent.did, event.text);
   state.totals.scrobbles += 1;
   tally.count(event.emoji, event.uri);
   if (event.emoji) sayer(event.emoji, agent.did);
@@ -741,7 +741,7 @@ function forget(agent) {
   const server = state.servers.get(agent.server);
   if (server) server.hosted -= 1;
   state.agents.delete(agent.did);
-  workIndex.forget(agent.did);
+  if (workIndex) workIndex.forget(agent.did);
   Detail.forget(agent.did);
   if (state.focus && state.focus.did === agent.did) setFocus(null);
 }
diff --git a/web/graph/loop.js b/web/graph/loop.js
index 93b865bf..b6e2b6bb 100644
--- a/web/graph/loop.js
+++ b/web/graph/loop.js
@@ -96,7 +96,7 @@ function adoptGroups(groups) {
  * browser has instead, with a deadline so it still happens on a busy page.
  */
 function scheduleRecluster() {
-  if (living) return;
+  if (living || !workIndex) return;
   if (reclustering || state.now < reclusterDue) return;
   reclustering = true;
   reclusterDue = state.now + RECLUSTER;
@@ -301,4 +301,4 @@ if (document.fonts) document.fonts.ready.then(() => wake());
  */
 let addressDue = 0;
 
-export { adoptGroups, applyWantedGroup, frames, wake, wantGroup, wantedGroup };
+export { adoptGroups, applyWantedGroup, frames, wake, wantGroup };
diff --git a/web/graph/main.js b/web/graph/main.js
index 92e01001..d6e0aad0 100644
--- a/web/graph/main.js
+++ b/web/graph/main.js
@@ -63,10 +63,10 @@ readAddress();
     const badge = document.getElementById("source");
     badge.textContent = "no query service";
     badge.classList.add("down");
+    const local = ["localhost", "127.0.0.1", "[::1]"].includes(location.hostname);
     badge.dataset.hint =
-      `nothing answered at ${query || Live.DEFAULT_QUERY}. ` +
-      "Start the query service, or open dev/#mock for an invented " +
-      "population.";
+      `nothing answered at ${query || Live.DEFAULT_QUERY}.` +
+      (local ? " Start the query service, or open dev/#mock for an invented population." : "");
     return;
   }
   const live = source;
diff --git a/web/graph/state.js b/web/graph/state.js
index fac974ee..c32fe7a6 100644
--- a/web/graph/state.js
+++ b/web/graph/state.js
@@ -364,7 +364,8 @@ function setFeed(next) {
 function setLiving(on) {
   living = on;
 }
-const workIndex = new Work.WorkIndex();
+/** The mock's local clustering; `dev/index.html` is the only page that loads it. */
+const workIndex = typeof Work !== "undefined" ? new Work.WorkIndex() : null;
 
 /** How often the whole population is reclustered, in seconds. */
 const RECLUSTER = 0.8;
@@ -372,4 +373,4 @@ const RECLUSTER = 0.8;
 const DRAWN_CLUSTERS = 16;
 const detailRoot = document.getElementById("detail-root");
 
-export { BLOB_BINS, BLOB_EASE, BLOB_PAD, CALLOUT_CHARS, CALLOUT_TTL, CHURN_MEMORY, CHURN_SPREAD, DAMPING, DRAWN_CLUSTERS, EFFORT_SCALE, FEATURED, FLOAT_CAP, FOREIGN_RADIUS, GOLDEN, HEAT_DECAY, HUB_LAYOUT, HUB_ROOM, HUB_SPACING, KIN_LIMIT, KIN_REACH, K_FOREIGN, K_HUB, K_KIN, K_MESH, K_NODE, K_OWN, K_PLACE, K_REPULSE, K_SPRING, K_WORK, LABEL_ZOOM, MARK_TTL, MAX_NEIGHBOURS, MAX_SPEED, MAX_WORK_FORCE, MESH_DEGREE, NODE_MARGIN, NOTHING, OWN_CLEARANCE, PICTURE_SIZE, PING_TTL, PULSE_CAP, PULSE_HOP, REACH_LEAST, REACH_SPREAD, RECLUSTER, REPULSE_RADIUS, REST_CHILD, REST_MESH, REST_ROOT, SERVER_RING, SMOOTHING, SUBSTEPS, SWARM_ZOOM, THEME_ALPHA, THEME_BRIDGE, THEME_PAD, TYPE_RATE, UNFOLD_EASE, WANTS_MOCK, camera, canvas, clockShift, ctx, detailRoot, feed, living, logList, pageClock, setFeed, setLiving, shiftClock, state, tally, tallyCanvas, view, withoutDevSources, workIndex };
+export { BLOB_BINS, BLOB_EASE, BLOB_PAD, CALLOUT_CHARS, CALLOUT_TTL, CHURN_MEMORY, CHURN_SPREAD, DAMPING, DRAWN_CLUSTERS, EFFORT_SCALE, FEATURED, FLOAT_CAP, FOREIGN_RADIUS, GOLDEN, HEAT_DECAY, HUB_LAYOUT, HUB_ROOM, HUB_SPACING, KIN_LIMIT, KIN_REACH, K_FOREIGN, K_HUB, K_KIN, K_MESH, K_NODE, K_OWN, K_PLACE, K_REPULSE, K_SPRING, K_WORK, LABEL_ZOOM, MARK_TTL, MAX_NEIGHBOURS, MAX_SPEED, MAX_WORK_FORCE, MESH_DEGREE, NODE_MARGIN, NOTHING, OWN_CLEARANCE, PICTURE_SIZE, PING_TTL, PULSE_CAP, PULSE_HOP, REACH_LEAST, REACH_SPREAD, RECLUSTER, REPULSE_RADIUS, REST_CHILD, REST_MESH, REST_ROOT, SERVER_RING, SMOOTHING, SUBSTEPS, SWARM_ZOOM, THEME_ALPHA, THEME_BRIDGE, THEME_PAD, TYPE_RATE, UNFOLD_EASE, WANTS_MOCK, camera, canvas, ctx, detailRoot, feed, living, logList, pageClock, setFeed, setLiving, shiftClock, state, tally, tallyCanvas, view, withoutDevSources, workIndex };
diff --git a/web/index.html b/web/index.html
index 1b3dec25..1b4e86c5 100644
--- a/web/index.html
+++ b/web/index.html
@@ -220,7 +220,6 @@
     <script src="detail.js"></script>
     <script src="live.js"></script>
     <script src="taxonomy.js"></script>
-    <script src="work.js"></script>
     <script type="module" src="graph/main.js"></script>
   </body>
 </html>
diff --git a/web/work.js b/web/work.js
index e44e1057..88b536ab 100644
--- a/web/work.js
+++ b/web/work.js
@@ -6,7 +6,8 @@
  *
  * # What this is for now
  *
- * The mock feed, and nothing else. A live page is handed its groups by the
+ * The mock feed, and nothing else: only `dev/index.html` loads this file.
+ * A live page is handed its groups by the
  * index, which since it moved to a server groups by meaning rather than by
  * shared words — see `crates/vibescrobble-index/src/work.rs`. This stayed
  * lexical on purpose: it clusters an invented population whose agents repeat