Replace session wall clock with completed sub-agent durations

src/tui/app.tsx

@@ -7,7 +7,7 @@ import { useState, useMemo, useEffect, useRef, type ReactNode } from "react";
 import { useAgentStream } from "./use-stream.js";
 import { Header } from "./components/header.js";
 import { EventLog, TEXT_GUTTER, resolveViewportExpandIds } from "./components/event-log.js";
-import { StatusBar } from "./components/status-bar.js";
+import { StatusBar, formatCompletedAgentsLabel } from "./components/status-bar.js";
 import { useGitBranch } from "./git-branch.js";
 import { formatStatusBarSegments } from "../cost/cost-summary.js";
 import { OnboardingAnimation } from "./components/onboarding-animation.js";
@@ -42,7 +42,6 @@ import type { SubAgentProvider, SubAgentSessionStore } from "../subagent/index.j
 import { useSpinner } from "./hooks/use-spinner.js";
 import { chromeDividerLine } from "./chrome-zones.js";
 import { useQuotaRetry } from "./hooks/use-quota-retry.js";
-import { useSessionClock } from "./hooks/use-session-clock.js";
 import { useRevolvingVerb } from "./hooks/use-revolving-verb.js";
 import { color } from "./theme.js";
 import { useTerminalSize } from "./hooks/use-terminal-size.js";
@@ -179,9 +178,6 @@ export type AppProps = {
   // Emits "scrollUp"/"scrollDown" for mouse-wheel events, which are stripped
   // from stdin before they reach useInput (see createFilteredStdin).
   mouseEvents?: EventEmitter;
-  // Wall-clock ms timestamp the session started. Drives the whole-session timer
-  // in the status bar; reset on /new.
-  sessionStartedAt?: number;
   // Inspectable child sessions for the Agents strip and enter-session UI.
   subAgentSessions?: SubAgentSessionStore;
   /** Goal mode operator surface. */
@@ -267,7 +263,6 @@ export function App({
   globallyOnboarded = false,
   globalOnboardingPath,
   mouseEvents,
-  sessionStartedAt: sessionStartedAtProp,
   subAgentSessions,
   goalApi,
   telemetryNotice,
@@ -583,6 +578,8 @@ export function App({
     providerCatalog,
     extraChromeRows,
   });
+
+  const completedAgentsLabel = formatCompletedAgentsLabel(subAgentSessions?.list() ?? []);
   const { leftWidth, visibleRows, effectiveOverlayRows, permissionsOverlayRows } = layout;
   // Text wraps and renders inside the gutter so prose never touches the edges.
   const contentWidth = Math.max(8, leftWidth - TEXT_GUTTER * 2);
@@ -652,8 +649,6 @@ export function App({
   const copyTargetList = copyModeOpen ? copyTargetsRef.current : [];
 
   const [, forceRender] = useState(0);
-  // Whole-session timer for the status bar. Held in state so /new can zero it.
-  const [sessionStartedAt, setSessionStartedAt] = useState(sessionStartedAtProp ?? Date.now());
 
   const {
     sendMessage,
@@ -694,7 +689,6 @@ export function App({
     promptXaiRelogin,
     setExpandedTools,
     setInputValue,
-    setSessionStartedAt,
     setEnteredSessionId,
     setAgentsNavOpen,
     setAgentsNavIndex,
@@ -758,7 +752,6 @@ export function App({
     streamingType: state.streamingType,
   });
 
-  const sessionElapsedMs = useSessionClock(sessionStartedAt);
   // Persistent status bar segment: refreshes on an interval, never
   // blocks render on the git process.
   const gitBranch = useGitBranch(cwd);
@@ -1334,7 +1327,7 @@ export function App({
           )}
         <Box marginTop={1}>
           <StatusBar
-            sessionElapsedMs={sessionElapsedMs}
+            {...(completedAgentsLabel !== undefined ? { completedAgentsLabel } : {})}
             mcpCount={mcpStatus.connected.length}
             model={model}
             cwd={cwd}

src/tui/components/agents-strip.tsx

@@ -4,6 +4,7 @@ import type { Task } from "../../agent/tasks.js";
 import type { SubAgentSession, SubAgentSessionStatus } from "../../subagent/session-store.js";
 import { color } from "../theme.js";
 import { describeToolCall } from "../tool-formatter.js";
+import { formatElapsed } from "./in-flight-indicator.js";
 
 export type AgentsStripProps = {
   sessions: readonly SubAgentSession[];
@@ -314,6 +315,13 @@ function currentToolArguments(session: SubAgentSession): string {
 }
 
 export function formatSessionLabel(session: SubAgentSession): string {
+  // Only finished workers get a duration suffix — matches status-bar policy
+  // (completed sub-agent times, not a live tick for in-flight sessions).
+  const duration =
+    session.finishedAt !== undefined && session.finishedAt >= session.startedAt
+      ? formatElapsed(session.finishedAt - session.startedAt)
+      : undefined;
+  const durationSuffix = duration !== undefined ? ` · ${duration}` : "";
   if (session.status === "running" && session.currentToolName !== null) {
     const args = currentToolArguments(session);
     const { summary, isShell } = describeToolCall(session.currentToolName, args);
@@ -325,13 +333,13 @@ export function formatSessionLabel(session: SubAgentSession): string {
         ? `${session.currentToolName} ${summary}`
         : session.currentToolName;
     const tool = ` — ${preview}`;
-    return `${session.agentId}: ${session.description}${tool}`;
+    return `${session.agentId}: ${session.description}${tool}${durationSuffix}`;
   }
   const tool =
     session.toolNames.length > 0 && session.status !== "running"
       ? ` · ${session.toolNames.length} tool${session.toolNames.length === 1 ? "" : "s"}`
       : "";
-  return `${session.agentId}: ${session.description}${tool}`;
+  return `${session.agentId}: ${session.description}${tool}${durationSuffix}`;
 }
 
 function summaryCounts(sessions: readonly SubAgentSession[]): string {

src/tui/components/status-bar.tsx

@@ -9,8 +9,9 @@ import { color, type SemanticRole } from "../theme.js";
 import { PRODUCT_NAME } from "../../branding.js";
 
 export type StatusBarProps = {
-  // Whole-session elapsed time, always counting (not per-turn).
-  sessionElapsedMs: number;
+  // Label for completed sub-agent timing (e.g. "agents 2m 14s"). Replaces the
+  // whole-session wall clock which was noise for long sessions.
+  completedAgentsLabel?: string;
   mcpCount: number;
   // Pre-formatted by src/cost/cost-summary.ts; omitted entirely when cost
   // should stay hidden (free model, coding plan) rather than shown as $0.
@@ -76,7 +77,7 @@ const MIN_TRUNCATED_CWD = 5;
 
 export type StatusBarLayoutArgs = {
   columns: number;
-  timerText: string;
+  agentsText?: string;
   mcpText?: string;
   model?: string;
   // Already home-abbreviated.
@@ -108,7 +109,7 @@ function joinModelCwdBranch(model?: string, cwd?: string, gitBranch?: string): s
 }
 
 // Decides which low-priority segments fit in the terminal width. Priority
-// (highest to lowest, dropped first when narrow): brand+timer > MCP >
+// (highest to lowest, dropped first when narrow): brand+agents > MCP >
 // model/cwd/branch > cost > context. Only the cwd part is truncated — model
 // and branch names stay intact; if the cwd cannot absorb the overflow the
 // whole model/cwd/branch segment is dropped.
@@ -121,7 +122,7 @@ export function planStatusBarLayout(args: StatusBarLayoutArgs): StatusBarLayout
   const overflow = () =>
     usedColumns([
       BRAND,
-      args.timerText,
+      args.agentsText,
       segment,
       showCost ? args.costLabel : undefined,
       showContext ? args.contextLabel : undefined,
@@ -147,29 +148,20 @@ export function planStatusBarLayout(args: StatusBarLayoutArgs): StatusBarLayout
   };
 }
 
-export function formatElapsed(elapsedMs: number): string {
-  const totalSeconds = Math.floor(elapsedMs / 1000);
-  if (totalSeconds < 60) return `${totalSeconds}s`;
+export { formatElapsed } from "./in-flight-indicator.js";
+import { formatElapsed } from "./in-flight-indicator.js";
 
-  const seconds = totalSeconds % 60;
-  const totalMinutes = Math.floor(totalSeconds / 60);
-  if (totalMinutes < 60) return `${totalMinutes}m ${seconds}s`;
-
-  const minutes = totalMinutes % 60;
-  const hours = Math.floor(totalMinutes / 60);
-  return `${hours}h ${minutes}m ${seconds}s`;
-}
-
-// Slim footer: brand anchors the bottom-left with the session timer beside it;
-// MCP health sits on the right. The per-turn timer lives on the in-flight
-// indicator above the prompt box, not here.
+// Slim footer: brand anchors the bottom-left; completed sub-agent timing sits
+// beside it when any worker has finished this session. MCP health sits on the
+// right. The per-turn timer lives on the in-flight indicator above the prompt
+// box, not here.
 //
 // Segment priority (highest to lowest, dropped first when the terminal is
-// narrow): brand+timer > model/cwd/branch > cost/context. cwd is truncated
+// narrow): brand+agents > model/cwd/branch > cost/context. cwd is truncated
 // with a middle ellipsis before the model/cwd/branch segment is dropped
 // entirely.
 export function StatusBar({
-  sessionElapsedMs,
+  completedAgentsLabel,
   mcpCount,
   costLabel,
   contextLabel,
@@ -179,11 +171,14 @@ export function StatusBar({
   gitBranch,
   columns,
 }: StatusBarProps): ReactNode {
-  const timerText = formatElapsed(sessionElapsedMs);
+  const agentsText =
+    completedAgentsLabel !== undefined && completedAgentsLabel.length > 0
+      ? completedAgentsLabel
+      : undefined;
   const mcpText = mcpCount > 0 ? `MCP ✓ ${mcpCount}` : undefined;
   const { modelCwdBranchText, showCost, showContext } = planStatusBarLayout({
     columns: columns ?? 120,
-    timerText,
+    ...(agentsText !== undefined ? { agentsText } : {}),
     ...(mcpText !== undefined ? { mcpText } : {}),
     ...(model !== undefined ? { model } : {}),
     ...(cwd !== undefined ? { cwd: abbreviateHome(cwd) } : {}),
@@ -199,7 +194,9 @@ export function StatusBar({
   return (
     <Box flexDirection="row" paddingX={1} gap={1} overflow="hidden">
       <Text bold color={color("muted")} dimColor wrap="truncate-end">{BRAND}</Text>
-      <Text color={color("muted")} dimColor>{timerText}</Text>
+      {agentsText !== undefined && (
+        <Text color={color("muted")} dimColor>{agentsText}</Text>
+      )}
       {modelCwdBranchText !== undefined && (
         <Text color={color("muted")} dimColor wrap="truncate-end">{modelCwdBranchText}</Text>
       )}
@@ -216,3 +213,19 @@ export function StatusBar({
     </Box>
   );
 }
+
+/** Sum of finished agent wall times (not multi-agent phase wall clock) as a compact status-bar label. */
+export function formatCompletedAgentsLabel(
+  sessions: ReadonlyArray<{ status: string; startedAt: number; finishedAt?: number }>,
+): string | undefined {
+  let totalMs = 0;
+  let count = 0;
+  for (const s of sessions) {
+    if (s.status !== "done" && s.status !== "failed" && s.status !== "cancelled") continue;
+    if (s.finishedAt === undefined || s.finishedAt < s.startedAt) continue;
+    totalMs += s.finishedAt - s.startedAt;
+    count += 1;
+  }
+  if (count === 0) return undefined;
+  return `agents ${formatElapsed(totalMs)}`;
+}

src/tui/hooks/use-message-pipeline.ts

@@ -44,7 +44,6 @@ export type UseMessagePipelineArgs = {
   promptXaiRelogin: (name: string) => void;
   setExpandedTools: Dispatch<SetStateAction<ReadonlySet<string>>>;
   setInputValue: Dispatch<SetStateAction<string>>;
-  setSessionStartedAt: Dispatch<SetStateAction<number>>;
   setEnteredSessionId: Dispatch<SetStateAction<string | null>>;
   setAgentsNavOpen: Dispatch<SetStateAction<boolean>>;
   setAgentsNavIndex: Dispatch<SetStateAction<number>>;
@@ -98,7 +97,6 @@ export function useMessagePipeline({
   promptXaiRelogin,
   setExpandedTools,
   setInputValue,
-  setSessionStartedAt,
   setEnteredSessionId,
   setAgentsNavOpen,
   setAgentsNavIndex,
@@ -226,7 +224,6 @@ export function useMessagePipeline({
     lastSentMessageRef.current = "";
     quotaAutoRetryFiredRef.current = true;
     setInputValue("");
-    setSessionStartedAt(Date.now());
     setEnteredSessionId(null);
     setAgentsNavOpen(false);
     setAgentsNavIndex(0);

src/tui/runner.tsx

@@ -1466,7 +1466,6 @@ export async function runTUI(initialConfig: Config): Promise<number> {
       activePlugins={activePlugins}
       initialWorkflowStatus={workflowController.status()}
       mouseEvents={mouseEvents}
-      sessionStartedAt={startedAt}
       subAgentSessions={subAgentSessions}
       goalApi={{
         get: () => goalGovernor.get(),

tests/unit/tui/agents-strip.test.ts

@@ -258,8 +258,9 @@ describe("formatSessionLabel", () => {
       status: "done",
       currentToolName: null,
       toolNames: ["grep", "read_file"],
+      finishedAt: 5_000,
     });
-    expect(formatSessionLabel(session)).toBe("researcher: researching things · 2 tools");
+    expect(formatSessionLabel(session)).toBe("researcher: researching things · 2 tools · 5s");
   });
 
   test("shell tool preview leads with the command, not a redundant tool name", () => {
@@ -269,6 +270,15 @@ describe("formatSessionLabel", () => {
     const session = baseSession({ currentToolName: "run_shell", entries });
     expect(formatSessionLabel(session)).toBe("researcher: researching things — bun test");
   });
+
+  test("appends finished duration when finishedAt is set", () => {
+    const session = baseSession({
+      status: "done",
+      currentToolName: null,
+      finishedAt: 65_000,
+    });
+    expect(formatSessionLabel(session)).toBe("researcher: researching things · 1m 5s");
+  });
 });
 
 describe("agentsStripRowColor", () => {

tests/unit/tui/chrome-zone-budgets.test.tsx

@@ -35,7 +35,7 @@ test("status budget matches the rows StatusBar paints inside App's marginTop wra
   // App wraps StatusBar in <Box marginTop={1}>; mirror that wrapper here.
   const { lastFrame } = render(
     <Box marginTop={1}>
-      <StatusBar sessionElapsedMs={0} mcpCount={0} />
+      <StatusBar mcpCount={0} />
     </Box>,
   );
   expect(frameRows(lastFrame())).toBe(CHROME_ZONE_ROWS.status);