diff --git a/webviews/src/agent-session/acpmux/App.tsx b/webviews/src/agent-session/acpmux/App.tsx
index 771bb6ec16ae..0566b6c95b93 100644
--- a/webviews/src/agent-session/acpmux/App.tsx
+++ b/webviews/src/agent-session/acpmux/App.tsx
@@ -7494,7 +7494,7 @@ function AcpmuxPane({ initialChat }: { initialChat?: InitialChat }) {
             liveRuns: codexRuns,
             sessionStatus,
             lineBelow,
-            // A finished turn folds under one Worked for; opened, a Claude turn folds per run, as Claude desktop does.
+            // A finished turn folds as its harness family's app does (turnFoldStyle.ts).
             agentFamily: snapshot.summary?.family,
             // Other sessions' messages among them, two or more in a run, draw as one card.
             waitingSteers: snapshot.waitingSteers,
diff --git a/webviews/src/agent-session/acpmux/conversation/turnFoldStyle.test.ts b/webviews/src/agent-session/acpmux/conversation/turnFoldStyle.test.ts
new file mode 100644
index 000000000000..6424c36d99e6
--- /dev/null
+++ b/webviews/src/agent-session/acpmux/conversation/turnFoldStyle.test.ts
@@ -0,0 +1,21 @@
+import { expect, test } from "bun:test";
+import { turnFoldStyle } from "./turnFoldStyle";
+
+test("only ChatGPT and Codex fold to the conclusion with their calls drawn one under another", () => {
+  expect(turnFoldStyle("codex")).toEqual({ conclusion: true, runs: false });
+  expect(turnFoldStyle(undefined)).toEqual({ conclusion: true, runs: false });
+});
+
+test("Claude takes one Worked for with its runs folded inside, a variant id too", () => {
+  expect(turnFoldStyle("claude")).toEqual({ conclusion: true, runs: true });
+  expect(turnFoldStyle("claude-sr2")).toEqual({ conclusion: true, runs: true });
+});
+
+test("Gemini and Muse draw no Worked for; their runs fold in place", () => {
+  for (const family of ["gemini", "gemini-cli", "muse", "muse-code"])
+    expect(turnFoldStyle(family)).toEqual({ conclusion: false, runs: true });
+});
+
+test("a key on the object prototype is not a family", () => {
+  expect(turnFoldStyle("constructor")).toEqual({ conclusion: true, runs: false });
+});
diff --git a/webviews/src/agent-session/acpmux/conversation/turnFoldStyle.ts b/webviews/src/agent-session/acpmux/conversation/turnFoldStyle.ts
new file mode 100644
index 000000000000..af3943cb817b
--- /dev/null
+++ b/webviews/src/agent-session/acpmux/conversation/turnFoldStyle.ts
@@ -0,0 +1,39 @@
+// How a finished turn folds, per harness family: one table, read once per turn by turns.ts.
+//
+// Leo, 2026-11-04: "doesn't make sense to fold claude's transcripts like that. do it for chatgpt,
+// do the proper folds for however the other harnessses/model families fold (muse, gemini) but
+// chatgpt-style minimalism conclusion folding can only necessarily make sense for them". Spec:
+// leo-workspace design/chat-transcript.md "Turn fold per harness family".
+import { agentKey } from "../../shared/agentKey";
+
+export type TurnFoldStyle = {
+  /// A finished turn's work, and the interim notes between it, goes under one closed "Worked for"
+  /// line with only its conclusion in sight. False: no turn-level line; the work stays where it ran.
+  conclusion: boolean;
+  /// Each run of calls, the short notes inside it with it, folds into its own summary line ("Ran 3
+  /// commands"): inside an open "Worked for", or in place where the turn has none. False: the calls
+  /// draw one under another once the fold opens (a running turn's live runs aside).
+  runs: boolean;
+};
+
+/// ChatGPT and Codex: the conclusion fold, the minimal end of turn only their apps draw.
+const CODEX: TurnFoldStyle = { conclusion: true, runs: false };
+
+/// Keyed by the harness family's agent (agentKey: "claude-sr2" is "claude"). A family missing here
+/// folds as Codex does.
+export const TURN_FOLD_STYLES: Readonly<Record<string, TurnFoldStyle>> = {
+  codex: CODEX,
+  // Claude: one "Worked for" at the top of the turn (Leo, 2026-11-04: "replacing the top level
+  // thingy"); opened, its runs fold per run as Claude desktop draws them (cmux#30176).
+  claude: { conclusion: true, runs: true },
+  // Gemini CLI draws a turn as it ran: each run of calls in one tool box, no turn-level fold.
+  gemini: { conclusion: false, runs: true },
+  // Muse Code draws its turn as it ran too, with no conclusion fold: per-run lines in place.
+  muse: { conclusion: false, runs: true },
+};
+
+/// The fold style of a harness family (acpmux's summary `family`).
+export function turnFoldStyle(family: string | undefined): TurnFoldStyle {
+  const key = agentKey(family);
+  return (key !== undefined && Object.hasOwn(TURN_FOLD_STYLES, key) ? TURN_FOLD_STYLES[key] : undefined) ?? CODEX;
+}
diff --git a/webviews/src/agent-session/acpmux/conversation/turns.ts b/webviews/src/agent-session/acpmux/conversation/turns.ts
index 88940d814d6c..1dd2115b133e 100644
--- a/webviews/src/agent-session/acpmux/conversation/turns.ts
+++ b/webviews/src/agent-session/acpmux/conversation/turns.ts
@@ -41,6 +41,7 @@ import {
   foldBackgroundTurns,
   openBackgroundTurns,
 } from "./backgroundTurns";
+import { turnFoldStyle } from "./turnFoldStyle";
 import { foldMessageRuns, messageRunFoldFor, messageRunRevealKey, openMessageRuns } from "./messageRuns";
 import { backgroundRunFoldFor, foldBackgroundRuns, openBackgroundRuns } from "./backgroundRuns";
 
@@ -619,8 +620,7 @@ function shapedTurn(
     );
     // Where its runs fold, a run of them that carries messages between agents folds under one line
     // (messageRuns.ts; Leo, 2026-11-01: "this should be collapsible").
-    const messaged =
-      liveRuns || agentFamily?.startsWith("claude") === true ? foldMessageRuns(shapedBody, expanded) : shapedBody;
+    const messaged = liveRuns || turnFoldStyle(agentFamily).runs ? foldMessageRuns(shapedBody, expanded) : shapedBody;
     // A run of background-task notifications folds under one line (backgroundRuns.ts; Leo,
     // 2026-11-02: "why do you still do these").
     // A stretch the person came in after ends there, with the end-of-turn footer (`supersededFooters`).
@@ -779,13 +779,15 @@ function shapeTurn(
   const summary = turn[end]!;
   const body = turn.slice(0, end).filter((row) => !isVisiblyEmptyMessage(row));
   // Each harness family ends a turn as its own app does (Leo, 2026-11-01: "separate it per
-  // harness/model family. claude gets claude behaviour, codex gets codex"). Codex and ChatGPT fold
-  // the whole turn's work under one "Worked for". Claude Code has no "Worked for" of its own, but
-  // its turn takes one at the top too (Leo, 2026-11-04: "ofc claude code doesn't actually have the
-  // worked for... but i think we should be able to do that replacing the top level thingy maybe"):
-  // opened, each run of calls, the short notes inside it with it, folds into its own summary line,
-  // and a longer message between runs stays in place, as Claude desktop draws them.
-  const claudeGroups = agentFamily?.startsWith("claude") === true;
+  // harness/model family. claude gets claude behaviour, codex gets codex"), from one table
+  // (turnFoldStyle.ts). Codex and ChatGPT fold the whole turn's work under one "Worked for". Claude
+  // Code has no "Worked for" of its own, but its turn takes one at the top too (Leo, 2026-11-04: "ofc
+  // claude code doesn't actually have the worked for... but i think we should be able to do that
+  // replacing the top level thingy maybe"): opened, each run of calls, the short notes inside it
+  // with it, folds into its own summary line, and a longer message between runs stays in place, as
+  // Claude desktop draws them. Gemini and Muse draw no "Worked for": their runs fold in place.
+  const style = turnFoldStyle(agentFamily);
+  const inPlace = !style.conclusion;
   // Notification turns can contain an empty assistant segment and a summary solely for
   // bookkeeping. With no visible prompt or work, omit the whole turn, including its footer.
   if (isVisiblyEmptyMessage(user) && body.length === 0 && summary.status === "completed") return [];
@@ -806,7 +808,7 @@ function shapeTurn(
   const steerDialogue = steerDialogueIn(body);
   let folded = false;
   // Where the sub-sessions a folded turn started stay in sight (taskLine.experiment.ts).
-  const taskLook = experimentArm(finishedTaskLook);
+  const taskLook = inPlace ? undefined : experimentArm(finishedTaskLook);
   // A completed turn gets one fold for its work; personal steers keep their dialogue visible. The
   // row boundary above is still opensTurn/continuesTurn: an unrelated incoming prompt starts a
   // separate turn and is never gathered by adjacency alone.
@@ -817,7 +819,8 @@ function shapeTurn(
     // Work after the last answer folds with the work before it, so the answer stays last.
     // Edits after it join the card too, so its Undo covers the whole turn.
     const id = `${WORKED}-${segment.anchor.id}`;
-    const open = foldOpen || expanded.has(id);
+    // A family with no "Worked for" draws its turn as an open one without the line.
+    const open = inPlace || foldOpen || expanded.has(id);
     // A call still waiting for its permission stays in sight: beside the closed fold, and in its
     // folded run once the fold opens (TurnRows.tsx `staysInSight`).
     const out = (row: AcpmuxRow) =>
@@ -839,7 +842,7 @@ function shapeTurn(
       ? { id: `${TASK_LINE}-${segment.anchor.id}`, version, at: segment.anchor.at, kind: TASK_LINE, tasks }
       : undefined;
     if (work.length && !dialogue) {
-      folded = true;
+      folded = !inPlace;
       const from = segment.anchor.at;
       // Its label counts the fold's messages (`previous`), which can change while the summary's and
       // the answer's versions do not: the count is part of the version, so the memoized row redraws.
@@ -860,16 +863,16 @@ function shapeTurn(
         // "Worked for".
         ...(previous !== undefined && { previous }),
       };
-      shaped.push(worked);
+      if (!inPlace) shaped.push(worked);
       if (taskLine && taskLook === "after-fold") shaped.push(taskLine);
       // Open, each run of its work folds into its summary line between the commentary, as in a
       // running turn (codexRuns). A run that edited folds too: its edits stay in sight between the
       // summary lines of the work around them (TurnRows.tsx `runStretches`).
       // A steer's reply never joins a run: it stays in sight beside the steer.
-      const runs = liveRuns || claudeGroups;
+      const runs = liveRuns || style.runs;
       if (open)
         shaped.push(
-          ...(runs ? mergeShortNotes(work, steerDialogue, claudeGroups) : work).flatMap(withoutDrafts).map((row) => ({
+          ...(runs ? mergeShortNotes(work, steerDialogue, style.runs) : work).flatMap(withoutDrafts).map((row) => ({
             ...endedPlan(row),
             id: isEdit(row) ? `${row.id}${FOLDED}` : row.id,
             settled: true,
diff --git a/webviews/test/transcript-claude-turn-groups.test.ts b/webviews/test/transcript-claude-turn-groups.test.ts
index 174f516a3f45..b4f5b9bae942 100644
--- a/webviews/test/transcript-claude-turn-groups.test.ts
+++ b/webviews/test/transcript-claude-turn-groups.test.ts
@@ -206,3 +206,41 @@ test("a steered Codex turn still folds everything but the steer, the reply befor
   const view = turnView(steered(), new Set(), { now: Date.UTC(2026, 10, 1, 10), liveRuns: true, agentFamily: "codex" });
   expect(view.map((row) => row.id)).toEqual(["u", `${WORKED}-u`, "r1", `${SUPERSEDED}-s1`, "s1", "answer", "sum"]);
 });
+
+// Gemini CLI and Muse Code draw a turn as it ran, with no "Worked for" over the conclusion (Leo,
+// 2026-11-04: "chatgpt-style minimalism conclusion folding can only necessarily make sense for
+// them"): each run folds into its own line in place, the longer messages between them.
+for (const family of ["gemini", "muse"]) {
+  test(`the recorded turn in a ${family} chat draws no Worked for; each run folds in place`, async () => {
+    const rows = await replayRows();
+    const view = turnView(rows, new Set(), { now: history.at(-1).at + 60_000, liveRuns: true, agentFamily: family });
+    expect(view.some((row) => row.kind === WORKED)).toBe(false);
+    const runs = view.filter((row) => row.kind === "activity" && !row.merged);
+    expect(runs.length).toBeGreaterThan(1);
+    expect(runs.every((row) => row.foldRun === true)).toBe(true);
+    expect(
+      assistants(view)
+        .filter((row) => LONG.test(row.text ?? ""))
+        .map(longAt),
+    ).toEqual([14, 16, 17]);
+    expect(view.find((row) => row.kind === "turnSummary")?.folded).toBe(false);
+  });
+
+  test(`a steered ${family} turn keeps every run in place, its notes inside them`, () => {
+    const view = turnView(steered(), new Set(), {
+      now: Date.UTC(2026, 10, 1, 10),
+      liveRuns: true,
+      agentFamily: family,
+    });
+    expect(view.map((row) => row.id)).toEqual(["u", "b1", "r1", "b3", `${SUPERSEDED}-s1`, "s1", "b4", "answer", "sum"]);
+  });
+}
+
+test("a family the table does not name folds as Codex does", () => {
+  const view = turnView(steered(), new Set(), {
+    now: Date.UTC(2026, 10, 1, 10),
+    liveRuns: true,
+    agentFamily: "opencode",
+  });
+  expect(view.map((row) => row.id)).toEqual(["u", `${WORKED}-u`, "r1", `${SUPERSEDED}-s1`, "s1", "answer", "sum"]);
+});