diff --git a/src/components/EndSummary.tsx b/src/components/EndSummary.tsx
index e5dde89..d771964 100644
--- a/src/components/EndSummary.tsx
+++ b/src/components/EndSummary.tsx
@@ -21,12 +21,6 @@ export function EndSummary({ game }: { game: GameState }) {
     { label: "Average speed", value: `${stats.wpm} wpm`, key: "wpm" },
     { label: "Fastest prompt", value: stats.best ? `${stats.best.wpm} wpm in ${stats.best.thread}` : "-", key: "best" },
     { label: "Accuracy", value: `${Math.round(stats.accuracy * 100)}%`, key: "accuracy" },
-    { label: "Typos taken literally", value: String(stats.typosLiteral), key: "typos" },
-    {
-      label: "Parallelism",
-      value: `${stats.parallelism.toFixed(1)} agents on average, ${stats.peakAgents} at peak`,
-      key: "parallelism",
-    },
     { label: "Threads finished", value: `${stats.threadsDone} of ${game.threads.length}`, key: "threads" },
   ];
   return (
diff --git a/src/game/store.ts b/src/game/store.ts
index ff4ec6c..783bb36 100644
--- a/src/game/store.ts
+++ b/src/game/store.ts
@@ -48,9 +48,6 @@ export interface Session {
   correctKeystrokes: number;
   promptsSent: number;
   typosLiteral: number;
-  runningAgentMs: GameMs;
-  lastSampleAt: GameMs | null;
-  peakAgents: number;
 }
 
 export interface GameState {
@@ -100,9 +97,6 @@ function freshSession(): Session {
     correctKeystrokes: 0,
     promptsSent: 0,
     typosLiteral: 0,
-    runningAgentMs: 0,
-    lastSampleAt: null,
-    peakAgents: 0,
   };
 }
 
@@ -154,10 +148,6 @@ export function isSettled(thread: ThreadState): boolean {
   return thread.settledAt !== null;
 }
 
-export function runningCount(threads: ThreadState[]): number {
-  return threads.filter(isWorking).length;
-}
-
 export function activeThread(s: GameState = state): ThreadState {
   return s.threads.find((thread) => thread.def.id === s.activeId) ?? s.threads[0]!;
 }
@@ -170,8 +160,6 @@ export interface Stats {
   accuracy: number;
   promptsSent: number;
   typosLiteral: number;
-  parallelism: number;
-  peakAgents: number;
   elapsedMs: number;
   threadsDone: number;
 }
@@ -217,26 +205,13 @@ export function computeStats(s: GameState = state): Stats {
     accuracy,
     promptsSent: session.promptsSent,
     typosLiteral: session.typosLiteral,
-    parallelism: elapsedMs > 0 ? session.runningAgentMs / elapsedMs : 0,
-    peakAgents: session.peakAgents,
     elapsedMs,
     threadsDone: s.threads.filter(isComplete).length,
   };
 }
 
-function sampleRunningAgents(session: Session, threads: ThreadState[], now: GameMs): Session {
-  if (session.status !== "playing" || session.lastSampleAt === null) return session;
-  const running = runningCount(threads);
-  return {
-    ...session,
-    runningAgentMs: session.runningAgentMs + running * Math.max(0, now - session.lastSampleAt),
-    lastSampleAt: now,
-  };
-}
-
 function advance(s: GameState, now: GameMs): GameState {
   let changed = false;
-  const session = sampleRunningAgents(s.session, s.threads, now);
   const threads = s.threads.map((thread) => {
     const last = thread.turns.at(-1);
     if (!last || last.done || now < last.startedAt + last.durationMs) return thread;
@@ -249,9 +224,9 @@ function advance(s: GameState, now: GameMs): GameState {
       updatedAt: finishedAt,
     };
   });
-  let next: GameState = { ...s, threads: changed ? threads : s.threads, session, now };
+  let next: GameState = { ...s, threads: changed ? threads : s.threads, now };
   next = autoSettle(next, now);
-  if (session.status === "playing" && next.threads.every(isComplete)) {
+  if (s.session.status === "playing" && next.threads.every(isComplete)) {
     next = endSession(next, "done", now);
   }
   return next;
@@ -282,7 +257,7 @@ function autoSettle(s: GameState, now: GameMs): GameState {
 function endSession(s: GameState, reason: "done", at: GameMs): GameState {
   return {
     ...s,
-    session: { ...s.session, status: "ended", endReason: reason, endedAt: at, lastSampleAt: null },
+    session: { ...s.session, status: "ended", endReason: reason, endedAt: at },
   };
 }
 
@@ -311,7 +286,7 @@ function canType(thread: ThreadState): boolean {
 
 function startIfReady(s: GameState, now: GameMs): GameState {
   if (s.session.status !== "ready") return s;
-  return { ...s, session: { ...s.session, status: "playing", startedAt: now, lastSampleAt: now } };
+  return { ...s, session: { ...s.session, status: "playing", startedAt: now } };
 }
 
 export function typeChar(ch: string) {
@@ -391,8 +366,6 @@ export function send() {
     draftCorrectKeys: 0,
     updatedAt: now,
   }));
-  const running = runningCount(s.threads);
-  s = { ...s, session: { ...s.session, peakAgents: Math.max(s.session.peakAgents, running) } };
   set(s);
 }
 
diff --git a/tests/play.mjs b/tests/play.mjs
index 82e17e4..54c44ec 100644
--- a/tests/play.mjs
+++ b/tests/play.mjs
@@ -115,14 +115,13 @@ async function playFullSessionInDark(browser) {
   check(end.stats.promptsSent === totalPrompts, `sent all ${totalPrompts} prompts (got ${end.stats.promptsSent})`);
   check(end.stats.typosLiteral >= typoPrompts, `typos taken literally: ${end.stats.typosLiteral} for ${typoPrompts} typo prompts`);
   check(switchesWhileRunning >= 5, `switched threads while an agent ran ${switchesWhileRunning} times`);
-  check(end.stats.parallelism > 1, `parallelism above 1 (got ${end.stats.parallelism.toFixed(2)})`);
   check(end.stats.accuracy < 1 && end.stats.accuracy > 0.9, `accuracy is plausible (${(end.stats.accuracy * 100).toFixed(1)}%)`);
   check(end.stats.wpm > 0, `wpm is positive (${end.stats.wpm})`);
   const literal = end.threads.flatMap((t) => t.turns).filter((turn) => turn.reply.literal);
   const quotesTypo = literal.every((turn) => turn.diff.typos.length === 0 || turn.reply.text.includes(turn.diff.typos[0].typed));
   check(literal.length > 0 && quotesTypo, `${literal.length} literal replies quote the typo as typed`);
   const summary = await page.locator("[data-summary]").allTextContents();
-  check(summary.length === 7, `end screen shows ${summary.length} stat rows`);
+  check(summary.length === 5, `end screen shows ${summary.length} stat rows`);
   check(errors.length === 0, `no console errors in dark run${errors.length ? `: ${errors.join(" | ")}` : ""}`);
 
   await page.keyboard.press("Enter");