diff --git a/frontend/src/features/agents/CustomAgentChatView.test.tsx b/frontend/src/features/agents/CustomAgentChatView.test.tsx
index 6c9e46a3..8b9ba2ee 100644
--- a/frontend/src/features/agents/CustomAgentChatView.test.tsx
+++ b/frontend/src/features/agents/CustomAgentChatView.test.tsx
@@ -242,6 +242,9 @@ describe("CustomAgentChatView", () => {
 
     await screen.findByText("done");
     expect(screen.getAllByText("hello agent")).toHaveLength(1);
+    expect(screen.getByText("Terminé").parentElement?.parentElement?.className).toContain(
+      "justify-end",
+    );
   });
 
   it("renders canonical progress chunks as live agent, MCP, and delegation activity", async () => {
@@ -357,8 +360,8 @@ describe("CustomAgentChatView", () => {
     expect(screen.getByText("MCP")).toBeTruthy();
     expect(screen.getByText("MCP").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
     expect(screen.getByText("idea_ticket_read")).toBeTruthy();
-    expect(screen.getByText("Demande à QA")).toBeTruthy();
-    expect(screen.getByText("Demande à QA").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
+    expect(screen.getByText("Worker ← QA")).toBeTruthy();
+    expect(screen.getByText("Worker ← QA").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
     expect(screen.getByText("Valider le rendu progress")).toBeTruthy();
     expect((await screen.findAllByText("done")).length).toBeGreaterThan(0);
   });
@@ -547,6 +550,13 @@ describe("CustomAgentChatView", () => {
     act(() => {
       emitChunk?.(progress("providerNative", "started"));
       emitChunk?.(progress("ideaLocal", "started"));
+    });
+
+    expect(screen.getByText("Worker → QA")).toBeTruthy();
+    expect(screen.getByText("Worker → QA").parentElement?.textContent).toContain("started");
+    expect(screen.getAllByRole("status", { name: "Loading" }).length).toBeGreaterThan(0);
+
+    act(() => {
       emitChunk?.(progress("providerNative", "completed"));
       emitChunk?.(progress("ideaLocal", "completed"));
       emitChunk?.(progress("providerNative", "started"));
@@ -557,11 +567,12 @@ describe("CustomAgentChatView", () => {
     });
 
     await screen.findByText("done");
-    expect(screen.getByText("Demande à QA")).toBeTruthy();
-    expect(screen.getByText("validate")).toBeTruthy();
-    expect(screen.getByText("Appel inter-agent")).toBeTruthy();
-    expect(screen.getByText("reply delivered")).toBeTruthy();
+    expect(screen.getAllByText("Worker ← QA")).toHaveLength(2);
+    expect(screen.getAllByText("validate")).toHaveLength(2);
+    expect(screen.queryByText("Appel inter-agent")).toBeNull();
+    expect(screen.queryByText("reply delivered")).toBeNull();
     expect(screen.queryByText("Tool")).toBeNull();
+    expect(screen.queryByText("started")).toBeNull();
     await waitFor(() =>
       expect(screen.queryByRole("status", { name: "Loading" })).toBeNull(),
     );
diff --git a/frontend/src/features/agents/CustomAgentChatView.tsx b/frontend/src/features/agents/CustomAgentChatView.tsx
index 44765212..797abc13 100644
--- a/frontend/src/features/agents/CustomAgentChatView.tsx
+++ b/frontend/src/features/agents/CustomAgentChatView.tsx
@@ -226,6 +226,32 @@ function progressDisplayKey(progress: ReplyProgress): string {
 }
 
 function appendProgress(turns: ChatTurn[], progress: ReplyProgress): ChatTurn[] {
+  const entity = progressEntityKey(progress);
+  if (entity && progress.stage === "completed") {
+    let runningIndex = -1;
+    for (let index = turns.length - 1; index >= 0; index -= 1) {
+      const turn = turns[index];
+      if (
+        turn.role === "progress" &&
+        progressEntityKey(turn.progress) === entity &&
+        (turn.progress.stage === "started" || turn.progress.stage === "delta")
+      ) {
+        runningIndex = index;
+        break;
+      }
+    }
+    if (runningIndex >= 0) {
+      const next = [...turns];
+      const current = next[runningIndex];
+      if (current.role === "progress") {
+        next[runningIndex] = {
+          role: "progress",
+          progress: mergeCompletedProgress(current.progress, progress),
+        };
+      }
+      return next;
+    }
+  }
   const key = progressDisplayKey(progress);
   if (
     turns.some(
@@ -237,6 +263,18 @@ function appendProgress(turns: ChatTurn[], progress: ReplyProgress): ChatTurn[]
   return [...turns, { role: "progress", progress }];
 }
 
+function mergeCompletedProgress(
+  running: ReplyProgress,
+  completed: ReplyProgress,
+): ReplyProgress {
+  if (!isDelegationProgress(running) || !completed.text) return completed;
+  if (delegationSummary(completed).target) return completed;
+  return {
+    ...completed,
+    text: running.text,
+  };
+}
+
 function completeRunningProgress(turns: ChatTurn[]): ChatTurn[] {
   const completedEntities = new Set(
     turns
@@ -258,7 +296,14 @@ function completeRunningProgress(turns: ChatTurn[]): ChatTurn[] {
     }
     const entity = progressEntityKey(turn.progress);
     if (entity && completedEntities.has(entity)) {
-      return { ...turn, settled: true };
+      return {
+        ...turn,
+        settled: true,
+        progress: {
+          ...turn.progress,
+          stage: "completed",
+        },
+      };
     }
     return {
       ...turn,
@@ -1146,7 +1191,9 @@ export function CustomAgentChatView({
             Envoyez un message pour démarrer la conversation structurée.
           </p>
         ) : (
-          turns.map((turn, index) => <ChatBubble key={index} turn={turn} />)
+          turns.map((turn, index) => (
+            <ChatBubble key={index} turn={turn} requesterName={agentName} />
+          ))
         )}
       </div>
 
@@ -1298,7 +1345,13 @@ export function CustomAgentChatView({
   );
 }
 
-function ChatBubble({ turn }: { turn: ChatTurn }) {
+function ChatBubble({
+  turn,
+  requesterName,
+}: {
+  turn: ChatTurn;
+  requesterName: string;
+}) {
   if (turn.role === "tool") {
     return (
       <div className="flex min-w-0 justify-center">
@@ -1309,11 +1362,17 @@ function ChatBubble({ turn }: { turn: ChatTurn }) {
     );
   }
   if (turn.role === "progress") {
-    return <ProgressBubble progress={turn.progress} settled={turn.settled} />;
+    return (
+      <ProgressBubble
+        progress={turn.progress}
+        requesterName={requesterName}
+        settled={turn.settled}
+      />
+    );
   }
   if (turn.role === "final") {
     return (
-      <div className="flex min-w-0 justify-start">
+      <div className="flex min-w-0 justify-end">
         <div className="min-w-0 max-w-[82%] overflow-hidden rounded-md border border-success/50 bg-success/10 px-3 py-2 text-sm text-content">
           <div className="mb-1 text-xs font-semibold text-success">Terminé</div>
           <p className="whitespace-pre-wrap break-words">{turn.text}</p>
@@ -1432,14 +1491,17 @@ function parseKeyValue(text: string, key: string): string | null {
 }
 
 function delegationSummary(progress: ReplyProgress): {
+  requester: string | null;
   target: string | null;
   excerpt: string | null;
 } {
   const text = progress.text ?? "";
+  const requester = parseKeyValue(text, "requester");
   const target = parseKeyValue(text, "target");
   const task = parseKeyValue(text, "task");
   const fallback = text && !target && !task ? text : null;
   return {
+    requester,
     target,
     excerpt: task
       ? truncateText(task, 92)
@@ -1474,9 +1536,11 @@ function TurnMarker({ progress }: { progress: ReplyProgress }) {
 
 function ToolProgressCard({
   progress,
+  requesterName,
   settled,
 }: {
   progress: ReplyProgress;
+  requesterName: string;
   settled: boolean;
 }) {
   const running = !settled && (progress.stage === "started" || progress.stage === "delta");
@@ -1486,7 +1550,9 @@ function ToolProgressCard({
   const delegation = isDelegationProgress(progress) ? delegationSummary(progress) : null;
   const title = delegation
     ? delegation.target
-      ? `Demande à ${delegation.target}`
+      ? `${delegation.requester ?? requesterName} ${
+          progress.stage === "completed" ? "←" : "→"
+        } ${delegation.target}`
       : "Appel inter-agent"
     : progressTitle(progress);
   return (
@@ -1527,14 +1593,22 @@ function ToolProgressCard({
 
 function ProgressBubble({
   progress,
+  requesterName,
   settled = false,
 }: {
   progress: ReplyProgress;
+  requesterName: string;
   settled?: boolean;
 }) {
   if (isTimelineProgress(progress)) return <TurnMarker progress={progress} />;
   if (isCenteredToolProgress(progress)) {
-    return <ToolProgressCard progress={progress} settled={settled} />;
+    return (
+      <ToolProgressCard
+        progress={progress}
+        requesterName={requesterName}
+        settled={settled}
+      />
+    );
   }
   const title = progressTitle(progress);
   const stage = progressStageLabel(progress.stage);