diff --git a/frontend/app/lab/session-ui-showcase.test.tsx b/frontend/app/lab/session-ui-showcase.test.tsx
index f6ef5fea..6c8db825 100644
--- a/frontend/app/lab/session-ui-showcase.test.tsx
+++ b/frontend/app/lab/session-ui-showcase.test.tsx
@@ -46,7 +46,7 @@ test("renders every ported session-ui piece from mock canonical nodes", () => {
 
   // Queued pill: honest FIFO copy, Send now only on the head message.
   expect(html).toContain('data-session-ui="queued-message-pill"');
-  expect(html).toContain("Queued - sends after the current run");
+  expect(html).toContain("Queued - sends after the current reply");
   expect(html).toContain("Send now");
   expect(html).toContain("Queued #2 - 1 reply ahead");
 
diff --git a/frontend/components/chat/child-labels.test.ts b/frontend/components/chat/child-labels.test.ts
index c558a796..0efb283d 100644
--- a/frontend/components/chat/child-labels.test.ts
+++ b/frontend/components/chat/child-labels.test.ts
@@ -7,7 +7,7 @@ describe("childKindLabel", () => {
     expect(childKindLabel("bot_thread")).toBe("bot thread");
     expect(childKindLabel("subagent")).toBe("subagent");
     expect(childKindLabel("child_thread")).toBe("child thread");
-    expect(childKindLabel("spawned_session")).toBe("spawned session");
+    expect(childKindLabel("spawned_session")).toBe("helper agent");
   });
 });
 
@@ -16,7 +16,7 @@ describe("childGroupLabel", () => {
     expect(childGroupLabel({ subagent: 2, bot_thread: 1 })).toBe("2 subagents, 1 bot thread");
     expect(childGroupLabel({ subagent: 1 })).toBe("1 subagent");
     expect(childGroupLabel({ bot_thread: 2, spawned_session: 1, child_thread: 0 })).toBe(
-      "2 bot threads, 1 spawned session",
+      "2 bot threads, 1 helper agent",
     );
     expect(childGroupLabel({})).toBe("");
   });
diff --git a/frontend/components/chat/child-labels.ts b/frontend/components/chat/child-labels.ts
index fe12b044..729fdd00 100644
--- a/frontend/components/chat/child-labels.ts
+++ b/frontend/components/chat/child-labels.ts
@@ -10,7 +10,7 @@ const SINGULAR: Record<ChildKind, string> = {
   subagent: "subagent",
   bot_thread: "bot thread",
   child_thread: "child thread",
-  spawned_session: "spawned session",
+  spawned_session: "helper agent",
 };
 
 const ORDER: readonly ChildKind[] = ["subagent", "bot_thread", "child_thread", "spawned_session"];
diff --git a/frontend/components/chat/conversation-grammar.test.tsx b/frontend/components/chat/conversation-grammar.test.tsx
index 1c74939d..af1aaf87 100644
--- a/frontend/components/chat/conversation-grammar.test.tsx
+++ b/frontend/components/chat/conversation-grammar.test.tsx
@@ -217,7 +217,7 @@ test("a gateway child-session turn folds under its parent, never a second turn b
   // Its truth lives in the parent's subagent fold: honest serial Queued state
   // plus the open-as-own-session affordance.
   expect(html).toContain('data-testid="subagents-fold"');
-  expect(html).toContain("1 spawned session");
+  expect(html).toContain("1 helper agent");
   expect(html).toContain("Delegated: audit the docs");
   expect(html).toContain("Queued");
   expect(html).toContain('href="/session/run-child"');
diff --git a/frontend/components/chat/session-details-rail.test.tsx b/frontend/components/chat/session-details-rail.test.tsx
index 7addf7e3..e888f38d 100644
--- a/frontend/components/chat/session-details-rail.test.tsx
+++ b/frontend/components/chat/session-details-rail.test.tsx
@@ -106,7 +106,7 @@ describe("SessionDetailsRail", () => {
     expect(html).not.toContain("not reported");
   });
 
-  test("the runtime line presents the model as the one requested, not as the one that answered", () => {
+  test("the model line presents the model as the one requested, not as the one that answered", () => {
     // runs.model is what the plane asked the runtime for; no runtime reports
     // the model that answered, so the rail must not read as a fact.
     const html = renderToStaticMarkup(
@@ -115,7 +115,10 @@ describe("SessionDetailsRail", () => {
     expect(html).toContain("Codex");
     expect(html).toContain('data-testid="runtime-model-requested"');
     expect(html).toContain(">requested<");
-    expect(html).toContain("does not report which model answered");
+    expect(html).toContain("We are not told which model actually answered");
+    // Plain words for people (#339): no run, turn, session or runtime in the row or its tooltip.
+    expect(html).toContain("<dt class=\"shrink-0 text-text-tertiary\">Model</dt>");
+    expect(html).not.toContain("Runtime</dt>");
   });
 
   test("a thread with unloaded outline turns says its plan and totals are partial", () => {
diff --git a/frontend/components/chat/session-details-rail.tsx b/frontend/components/chat/session-details-rail.tsx
index a3c268be..7c534049 100644
--- a/frontend/components/chat/session-details-rail.tsx
+++ b/frontend/components/chat/session-details-rail.tsx
@@ -88,14 +88,14 @@ export function SessionDetailsRail({
       <Section title="Environment">
         <dl className="flex flex-col gap-1.5 rounded-2xl bg-background-secondary-default px-3 py-2.5">
           <Row label="Project">{project || "No repository"}</Row>
-          <Row label="Runtime">
+          <Row label="Model">
             <span className="flex min-w-0 items-center justify-end gap-2">
               {/* The model is the one the plane asked the runtime for (the run
                   row); no runtime reports back which model answered, so the
                   rail says so instead of presenting the request as a fact. */}
               <span
                 className="truncate"
-                title="The model this run asked for. The runtime does not report which model answered."
+                title="The model this task asked for. We are not told which model actually answered."
               >
                 {engineDisplayLabel(newest.engine)} · {modelLabel(newest.model, newest.engine)}{" "}
                 <span data-testid="runtime-model-requested" className="text-text-tertiary">
diff --git a/frontend/components/chat/subagent-pane-body.test.tsx b/frontend/components/chat/subagent-pane-body.test.tsx
index f755f32b..3f912437 100644
--- a/frontend/components/chat/subagent-pane-body.test.tsx
+++ b/frontend/components/chat/subagent-pane-body.test.tsx
@@ -65,7 +65,7 @@ describe("run peek body", () => {
 
   test("loading and error shells are neutral unless the caller knows it is a child", () => {
     expect(renderToStaticMarkup(<PaneStub>Loading</PaneStub>)).toContain(">Thread<");
-    expect(renderToStaticMarkup(<PaneStub label="Run">Loading</PaneStub>)).toContain(">Run<");
+    expect(renderToStaticMarkup(<PaneStub label="Task">Loading</PaneStub>)).toContain(">Task<");
     expect(renderToStaticMarkup(<PaneStub childSession>Loading</PaneStub>)).toContain(
       ">Subagent<",
     );
diff --git a/frontend/components/chat/subagent-pane-body.tsx b/frontend/components/chat/subagent-pane-body.tsx
index 6ace0ead..686b0abe 100644
--- a/frontend/components/chat/subagent-pane-body.tsx
+++ b/frontend/components/chat/subagent-pane-body.tsx
@@ -65,7 +65,7 @@ export default function SubagentPaneBody({
     return (
       <PaneStub childSession={childSession}>
         <p className="text-body-2-regular text-text-secondary text-center">
-          Couldn&apos;t load this run.
+          Couldn&apos;t load this task.
         </p>
       </PaneStub>
     );
@@ -73,7 +73,7 @@ export default function SubagentPaneBody({
   if (!run) {
     return (
       <PaneStub childSession={childSession}>
-        <LoadingState label="Loading run" />
+        <LoadingState label="Loading task" />
       </PaneStub>
     );
   }
diff --git a/frontend/components/chat/subagent-pane.tsx b/frontend/components/chat/subagent-pane.tsx
index bbe22b62..3ce0aa78 100644
--- a/frontend/components/chat/subagent-pane.tsx
+++ b/frontend/components/chat/subagent-pane.tsx
@@ -101,7 +101,7 @@ export function PaneStub({
 }: {
   children: React.ReactNode;
   childSession?: boolean;
-  label?: "Run";
+  label?: "Task";
 }) {
   return (
     <>
@@ -122,8 +122,8 @@ export function PaneStub({
 const SubagentPaneBody = dynamic(() => import("@/components/chat/subagent-pane-body"), {
   ssr: false,
   loading: () => (
-    <PaneStub label="Run">
-      <LoadingState label="Loading run" />
+    <PaneStub label="Task">
+      <LoadingState label="Loading task" />
     </PaneStub>
   ),
 });
@@ -245,7 +245,7 @@ export function SubagentPeekButton({
   return (
     <button
       type="button"
-      aria-label="Peek run"
+      aria-label="Preview task"
       onClick={(e) => {
         e.preventDefault();
         e.stopPropagation();
diff --git a/frontend/components/chat/subagents-fold.test.tsx b/frontend/components/chat/subagents-fold.test.tsx
index 8c3ff1de..045411f3 100644
--- a/frontend/components/chat/subagents-fold.test.tsx
+++ b/frontend/components/chat/subagents-fold.test.tsx
@@ -3,6 +3,7 @@ import { renderToStaticMarkup } from "react-dom/server";
 import { createCanonicalThreadStore, type CanonicalThreadEvent } from "@useagent/agent-client";
 import type { ThreadRelationship } from "@useagent/agent-client";
 import type { CanonicalChildEventLike } from "./canonical-children";
+import { childKindLabel } from "./child-labels";
 import { EXECUTION_SUMMARY_ROLLOUT_MODE } from "./execution-summary-rollout";
 import { type GatewayChildSession, SubagentsFold } from "./subagents-fold";
 
@@ -106,7 +107,7 @@ describe("subagents fold (inline conversation group)", () => {
       />,
     );
     expect(html).toContain('data-testid="subagents-fold"');
-    expect(html).toContain("1 subagent, 1 spawned session");
+    expect(html).toContain("1 subagent, 1 helper agent");
     // Native child row: title, agent-type, model, tokens, live state.
     expect(html).toContain("Verify checkout");
     expect(html).toContain("verifier");
@@ -117,6 +118,12 @@ describe("subagents fold (inline conversation group)", () => {
     expect(html).toContain("Summarize the wiki for onboarding");
     expect(html).toContain("Queued");
     expect(html).toContain('href="/session/child-run-1"');
+    // The link's name comes from the shared kind label, so this row and the Agents
+    // rail never call the same child two different things (#339).
+    expect(html).toContain(
+      `aria-label="Open ${childKindLabel("spawned_session")}: Summarize the wiki for onboarding"`,
+    );
+    expect(html).not.toContain("spawned");
     expect(html).not.toContain("parallel");
   });
 
@@ -139,7 +146,7 @@ describe("subagents fold (inline conversation group)", () => {
         childSessions={[gatewayChild({ status: "completed", summary: "Wiki summarized." })]}
       />,
     );
-    expect(html).toContain("1 subagent, 1 spawned session");
+    expect(html).toContain("1 subagent, 1 helper agent");
     expect(html).toContain('aria-expanded="false"');
     expect(html).not.toContain("Suite green.");
   });
diff --git a/frontend/components/chat/subagents-fold.tsx b/frontend/components/chat/subagents-fold.tsx
index de2d692d..db0df00b 100644
--- a/frontend/components/chat/subagents-fold.tsx
+++ b/frontend/components/chat/subagents-fold.tsx
@@ -85,7 +85,7 @@ function GatewayChildRow({ child }: { child: GatewayChildSession }) {
       </div>
       <Link
         href={`/session/${child.id}`}
-        aria-label={`Open spawned session: ${firstLine(child.prompt)}`}
+        aria-label={`Open ${childKindLabel("spawned_session")}: ${firstLine(child.prompt)}`}
         title="Open as its own thread"
         className={ROW_LINK_CLASS}
       >
diff --git a/frontend/components/pro/queued-messages.tsx b/frontend/components/pro/queued-messages.tsx
index 19d5fe8e..4e73538a 100644
--- a/frontend/components/pro/queued-messages.tsx
+++ b/frontend/components/pro/queued-messages.tsx
@@ -79,7 +79,7 @@ function Row({
         <button
           type="button"
           onClick={onSendNow}
-          title="Stops the current turn; this message starts immediately"
+          title="Stops what the agent is doing now and sends this message right away"
           className="shrink-0 cursor-pointer text-caption-1-medium text-accent-500 underline-offset-2 outline-none hover:underline focus-visible:underline"
         >
           Send now
diff --git a/frontend/components/session-ui/agent-panel-row.test.tsx b/frontend/components/session-ui/agent-panel-row.test.tsx
index baf03fa4..7f044b14 100644
--- a/frontend/components/session-ui/agent-panel-row.test.tsx
+++ b/frontend/components/session-ui/agent-panel-row.test.tsx
@@ -212,14 +212,14 @@ describe("AgentPanelRow kind caption", () => {
     expect(html).not.toContain("text-[.65rem]");
   });
 
-  test("gateway rows read as spawned sessions", () => {
+  test("gateway rows read as helper agents, in the shared plain words", () => {
     const html = renderToStaticMarkup(
       <AgentPanelRow
         agent={{ ...base, lane: "gateway", kind: "spawned_session", engine: "claude" }}
         href="/session/child-1"
       />,
     );
-    expect(html).toContain("spawned session · Running");
-    expect(html).toContain('aria-label="Open spawned session: Research checkout"');
+    expect(html).toContain("helper agent · Running");
+    expect(html).toContain('aria-label="Open helper agent: Research checkout"');
   });
 });
diff --git a/frontend/components/session-ui/message-scroller-rail.test.tsx b/frontend/components/session-ui/message-scroller-rail.test.tsx
index 5cda17ea..cb5f361e 100644
--- a/frontend/components/session-ui/message-scroller-rail.test.tsx
+++ b/frontend/components/session-ui/message-scroller-rail.test.tsx
@@ -88,7 +88,7 @@ describe("render gating", () => {
     // Four ticks, each a titled button.
     expect(html.match(/<button/g)?.length).toBe(4);
     expect(html).toContain('title="first turn"');
-    expect(html).toContain('aria-label="Jump to turn 4: fourth turn"');
+    expect(html).toContain('aria-label="Jump to message 4: fourth turn"');
     // First tick is active on first paint (activeIndex defaults to 0).
     expect(html).toContain('aria-current="true"');
   });
diff --git a/frontend/components/session-ui/message-scroller-rail.tsx b/frontend/components/session-ui/message-scroller-rail.tsx
index 5c2fbbec..194d1d64 100644
--- a/frontend/components/session-ui/message-scroller-rail.tsx
+++ b/frontend/components/session-ui/message-scroller-rail.tsx
@@ -116,7 +116,7 @@ export function MessageScrollerRail({
   return (
     <nav
       data-session-ui="message-scroller-rail"
-      aria-label="Jump to a turn"
+      aria-label="Jump to a message"
       className="pointer-events-none absolute inset-y-4 right-2 z-20 hidden flex-col items-end justify-center gap-1 overflow-hidden lg:flex"
     >
       {ticks.map((tick, index) => {
@@ -126,7 +126,7 @@ export function MessageScrollerRail({
             key={tick.id}
             type="button"
             title={tick.snippet}
-            aria-label={`Jump to turn ${index + 1}: ${tick.snippet}`}
+            aria-label={`Jump to message ${index + 1}: ${tick.snippet}`}
             aria-current={active ? "true" : undefined}
             onClick={() => jumpTo(index)}
             className="group pointer-events-auto flex h-3.5 w-3 items-center justify-end rounded-sm outline-none focus-visible:ring-2 focus-visible:ring-border-focus-ring"
diff --git a/frontend/components/session-ui/queued-message-pill.test.tsx b/frontend/components/session-ui/queued-message-pill.test.tsx
index 8681b694..0f4daa5b 100644
--- a/frontend/components/session-ui/queued-message-pill.test.tsx
+++ b/frontend/components/session-ui/queued-message-pill.test.tsx
@@ -3,7 +3,7 @@ import { renderToStaticMarkup } from "react-dom/server";
 import { queuedPillLabel, QueuedMessagePill } from "./queued-message-pill";
 
 test("labels state the honest FIFO position, never a countdown", () => {
-  expect(queuedPillLabel(1)).toBe("Queued - sends after the current run");
+  expect(queuedPillLabel(1)).toBe("Queued - sends after the current reply");
   expect(queuedPillLabel(1, false)).toBe("Queued - waiting to start");
   expect(queuedPillLabel(2)).toBe("Queued #2 - 1 reply ahead");
   expect(queuedPillLabel(3)).toBe("Queued #3 - 2 replies ahead");
@@ -14,7 +14,7 @@ test("head queued pill is right-aligned and carries the Send now steering", () =
   expect(html).toContain('data-session-ui="queued-message-pill"');
   expect(html).toContain("justify-end");
   expect(html).toContain('role="status"');
-  expect(html).toContain("Queued - sends after the current run");
+  expect(html).toContain("Queued - sends after the current reply");
   expect(html).toContain("Send now");
 });
 
diff --git a/frontend/components/session-ui/queued-message-pill.tsx b/frontend/components/session-ui/queued-message-pill.tsx
index 46440734..e001222b 100644
--- a/frontend/components/session-ui/queued-message-pill.tsx
+++ b/frontend/components/session-ui/queued-message-pill.tsx
@@ -14,7 +14,7 @@ import { RiTimeLine } from "@remixicon/react";
  *  positions also wait on the replies ahead of them. */
 export function queuedPillLabel(position: number, waitingOnCurrentRun = true): string {
   if (!waitingOnCurrentRun) return "Queued - waiting to start";
-  if (position <= 1) return "Queued - sends after the current run";
+  if (position <= 1) return "Queued - sends after the current reply";
   const ahead = position - 1;
   return `Queued #${position} - ${ahead} ${ahead === 1 ? "reply" : "replies"} ahead`;
 }
@@ -47,7 +47,7 @@ export function QueuedMessagePill({
           <button
             type="button"
             onClick={onSendNow}
-            title="Stops the current turn; this message starts immediately"
+            title="Stops what the agent is doing now and sends this message right away"
             className="shrink-0 cursor-pointer text-accent-500 underline-offset-2 outline-none hover:underline focus-visible:underline"
           >
             Send now