diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
index 16e32a059f..137fb152f7 100644
--- a/.github/plugin/marketplace.json
+++ b/.github/plugin/marketplace.json
@@ -52,7 +52,7 @@
       "name": "agent-radar",
       "source": "plugins/agent-radar",
       "description": "See a live map of the Copilot agents on your computer, their sub-agents, their commands, and where their data goes.",
-      "version": "1.0.0"
+      "version": "1.0.1"
     },
     {
       "name": "agentcouncil",
diff --git a/extensions/agent-radar/graph.test.mjs b/extensions/agent-radar/graph.test.mjs
index 987f65d83f..2358da7d76 100644
--- a/extensions/agent-radar/graph.test.mjs
+++ b/extensions/agent-radar/graph.test.mjs
@@ -38,9 +38,9 @@ function graph(width = 1000, height = 500, panels = false) {
   vm.createContext(sandbox);
   vm.runInContext((panels ? panelSource : source) + `
     reduceMotion = true;
-    globalThis.graph = { build, draw, pick, toggleSelect, nodeInfo, label, nodes, focusedNodes, messagePoint, drawMessages,
+    globalThis.graph = { build, draw, pick, toggleSelect, nodeInfo, label, nodes, focusedNodes, messagePoint, drawMessages, spawnParticles,
       setReducedMotion(value) { reduceMotion = value; },
-      get messagePulses() { return messagePulses; },
+      get messagePulses() { return messagePulses; }, get particles() { return particles; },
       get links() { return links; }, get selected() { return selected; },
       get size() { return [W, H]; } };
   `, sandbox);
@@ -105,6 +105,27 @@ test("idle filtering keeps node identities and data flow attribution", () => {
   assert.equal(api.links.find((l) => l.kind === "flow").a, "s:one");
 });
 
+test("in-flight particles follow rebuilt links and drop with removed links", () => {
+  const { api, elements } = graph();
+  const idle = session("two");
+  idle.busy = false;
+  const s = session("one", 1);
+  api.setReducedMotion(false);
+  api.build(snapshot(s, idle));
+  api.spawnParticles(1000);
+  assert.ok(api.particles.some((p) => p.l.b === "a:one:child-0"));
+  elements.get("showIdle").checked = true;
+  api.build(snapshot(s, idle));
+  assert.ok(api.particles.length > 0);
+  for (const p of api.particles) assert.ok(api.links.includes(p.l));
+  elements.get("showIdle").checked = false;
+  s.subagents[0].running = false;
+  api.build(snapshot(s, idle));
+  assert.ok(api.particles.length > 0);
+  assert.ok(!api.particles.some((p) => p.l.b === "a:one:child-0"));
+  for (const p of api.particles) assert.ok(api.links.includes(p.l));
+});
+
 test("drawing shows diamond, name, status and task with pixel-bounded labels", () => {
   const { api, labels, paths } = graph(900);
   const s = session("one", 1);
diff --git a/extensions/agent-radar/ui.html b/extensions/agent-radar/ui.html
index 4cf6b60a46..b541751350 100644
--- a/extensions/agent-radar/ui.html
+++ b/extensions/agent-radar/ui.html
@@ -363,6 +363,9 @@ <h1>Agent Radar</h1>
   }
   for (const [id, n] of nodes) if (!n.seen) nodes.delete(id);
   links = links.filter((l) => nodes.has(l.a) && nodes.has(l.b));
+  // Move in-flight particles onto the rebuilt links so they follow re-laid-out paths.
+  const linkByEnds = new Map(links.map((l) => [l.a + "→" + l.b, l]));
+  particles = particles.filter((p) => (p.l = linkByEnds.get(p.l.a + "→" + p.l.b)));
   observeMessages(snap);
   if (selected && !nodes.has(selected.id)) selected = null;
   if (hover && !nodes.has(hover.id)) { hover = null; tip.style.display = "none"; cv.style.cursor = "default"; }
diff --git a/plugins/agent-radar/plugin.json b/plugins/agent-radar/plugin.json
index c263c3ab17..4747c9a315 100644
--- a/plugins/agent-radar/plugin.json
+++ b/plugins/agent-radar/plugin.json
@@ -2,7 +2,7 @@
   "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
   "name": "agent-radar",
   "description": "See a live map of the Copilot agents on your computer, their sub-agents, their commands, and where their data goes.",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "author": {
     "name": "Annika Wickert",
     "url": "https://github.com/awlx"