IdeA/frontend/src/features/agents/CustomAgentChatView.test.tsx

import { act, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
import { useState } from "react";
import { beforeEach, describe, expect, it, vi } from "vitest";

import { DIProvider } from "@/app/di";
import type { AgentProfile, ReplyChunk } from "@/domain";
import { MockSystemGateway, MockWorkStateGateway } from "@/adapters/mock";
import { AnnouncementsProvider } from "@/features/announcements";
import { PluginRuntimeProvider } from "@/features/plugins";
import {
  __resetProjectCliInteractionActivityForTests,
  hasProjectCliInteraction,
} from "@/features/projects/projectCliInteractionActivity";
import {
  PluginCommandRegistry,
  PluginLayoutRegistry,
  PluginMenuRegistry,
  PluginRuntimeRegistry,
} from "@/plugins/runtime";
import type { ChatDraftScope, Gateways } from "@/ports";
import {
  CustomAgentChatView,
  __clearCustomAgentChatViewCacheForTests,
} from "./CustomAgentChatView";

const profile: AgentProfile = {
  id: "structured",
  name: "Structured Codex",
  command: "codex",
  args: [],
  contextInjection: { strategy: "conventionFile", target: "AGENTS.md" },
  detect: null,
  cwdTemplate: "{projectRoot}",
  structuredAdapter: "codex",
};

function addPluginCommand(
  registry: PluginRuntimeRegistry,
  pluginId: string,
  commandId: string,
  handler: (...args: unknown[]) => unknown | Promise<unknown>,
) {
  const commands = new PluginCommandRegistry(pluginId, new Set([commandId]));
  commands.register(commandId, handler);
  registry.add({
    pluginId,
    displayName: "Acme Plugin",
    contributes: {
      menus: [],
      menuItems: [],
      slashCommands: [
        {
          name: "/explain",
          shortDescription: "Explain selection",
          command: commandId,
        },
      ],
      layouts: [],
      mcpServers: [],
    },
    commands,
    layouts: new PluginLayoutRegistry(pluginId, new Set()),
    menu: new PluginMenuRegistry(pluginId),
    dispose: async () => {},
  });
}

function deferred<T>() {
  let resolve!: (value: T | PromiseLike<T>) => void;
  const promise = new Promise<T>((res) => {
    resolve = res;
  });
  return { promise, resolve };
}

function createStreamingAgentHarness() {
  const emits: Array<((chunk: ReplyChunk) => void) | null> = [];
  const sendDone = new Map<number, () => void>();
  const sendAgentChat = vi.fn(
    (_sessionId: string, _prompt: string, onChunk: (chunk: ReplyChunk) => void) =>
      new Promise<void>((resolve) => {
        const index = emits.length;
        emits.push((chunk: ReplyChunk) => {
          onChunk(chunk);
          if (chunk.kind === "final" || chunk.kind === "error") {
            sendDone.get(index)?.();
          }
        });
        sendDone.set(index, resolve);
      }),
  );
  return {
    agent: {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat,
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    },
    sendAgentChat,
    emit(index: number, chunk: ReplyChunk) {
      const emit = emits[index];
      if (!emit) throw new Error(`Missing emitter for send call #${index + 1}`);
      emit(chunk);
    },
    emitterCount() {
      return emits.length;
    },
  };
}

function expectedChatTime(ms: number): string {
  const parts = new Intl.DateTimeFormat(undefined, {
    hour: "2-digit",
    minute: "2-digit",
    hourCycle: "h23",
  }).formatToParts(new Date(ms));
  const hour = parts.find((part) => part.type === "hour")?.value;
  const minute = parts.find((part) => part.type === "minute")?.value;
  return `${hour}:${minute}`;
}

function setMeasuredTextOverflow(
  element: Element,
  { scrollHeight, clientHeight }: { scrollHeight: number; clientHeight: number },
) {
  Object.defineProperty(element, "scrollHeight", {
    value: scrollHeight,
    configurable: true,
  });
  Object.defineProperty(element, "clientHeight", {
    value: clientHeight,
    configurable: true,
  });
  fireEvent(window, new Event("resize"));
}

function renderHistoryChat() {
  const agent = {
    launchAgentChat: vi.fn(),
    reattachAgentChat: vi.fn(async (sessionId: string) => ({
      sessionId,
      scrollback: [],
    })),
    sendAgentChat: vi.fn(
      async (_sessionId: string, prompt: string, onChunk: (chunk: ReplyChunk) => void) => {
        onChunk({ kind: "final", content: `answer ${prompt}` });
      },
    ),
    cancelAgentChat: vi.fn(async () => {}),
    closeAgentChat: vi.fn(async () => {}),
  };
  render(
    <DIProvider
      gateways={{
        agent,
        system: { pickFile: vi.fn(async () => null) },
      } as unknown as Gateways}
    >
      <CustomAgentChatView
        projectId="project-1"
        agentId="agent-1"
        agentName="Worker"
        profile={profile}
        cwd="/repo"
        layoutId="layout-1"
        nodeId="node-1"
        sessionId="chat-session-1"
        conversationId="conversation-1"
        onSessionId={vi.fn()}
        onConversationId={vi.fn()}
      />
    </DIProvider>,
  );
  return agent;
}

async function sendHistoryPrompt(
  composer: HTMLTextAreaElement,
  agent: ReturnType<typeof renderHistoryChat>,
  prompt: string,
) {
  const expectedCalls = agent.sendAgentChat.mock.calls.length + 1;
  fireEvent.change(composer, { target: { value: prompt } });
  fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
  await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(expectedCalls));
}

describe("CustomAgentChatView", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    window.localStorage.clear();
    __clearCustomAgentChatViewCacheForTests();
    __resetProjectCliInteractionActivityForTests();
  });

  it("settles an isolated conversation id without recovered turns as an actionable unavailable state (#307/#314)", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({ sessionId: "fresh-session" })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    const onConversationId = vi.fn();
    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="orphan-conversation"
          onSessionId={vi.fn()}
          onConversationId={onConversationId}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.launchAgentChat).toHaveBeenCalledWith(
        "project-1",
        "agent-1",
        expect.objectContaining({ conversationId: "orphan-conversation" }),
      ),
    );
    expect(
      await screen.findByText("La conversation liée n’a pas pu être restaurée."),
    ).toBeTruthy();
    expect(screen.getByText("Son transcript n’est plus disponible après la reprise.")).toBeTruthy();
    expect(
      screen.queryByText("Conversation liée — récupération du transcript en cours."),
    ).toBeNull();
    expect(screen.queryByRole("progressbar")).toBeNull();
    expect(screen.getByRole("button", { name: "Réessayer" })).toBeTruthy();
    fireEvent.click(screen.getByRole("button", { name: "Délier la conversation" }));
    expect(onConversationId).toHaveBeenCalledWith(null);
    expect(await screen.findByText("Envoyez un message pour démarrer la conversation structurée.")).toBeTruthy();
  });

  it("treats emptyConversation as a normal fresh conversation", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "fresh-session",
        transcriptUnavailableReason: "emptyConversation" as const,
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
        transcriptUnavailableReason: "emptyConversation" as const,
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    render(
      <DIProvider gateways={{ agent, system: { pickFile: vi.fn(async () => null) } } as unknown as Gateways}>
        <CustomAgentChatView projectId="project-1" agentId="agent-1" agentName="Worker" profile={profile} cwd="/repo" nodeId="node-1" sessionId={null} conversationId="conversation-1" onSessionId={vi.fn()} onConversationId={vi.fn()} />
      </DIProvider>,
    );
    expect(await screen.findByText("Envoyez un message pour démarrer la conversation structurée.")).toBeTruthy();
    expect(screen.queryByText("La conversation liée n’a pas pu être restaurée.")).toBeNull();
  });

  it("maps NOT_FOUND to an actionable missing conversation without automatic looping", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => { throw { code: "NOT_FOUND", message: "conversation not found" }; }),
      reattachAgentChat: vi.fn(),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    render(
      <DIProvider gateways={{ agent, system: { pickFile: vi.fn(async () => null) } } as unknown as Gateways}>
        <CustomAgentChatView projectId="project-1" agentId="agent-1" agentName="Worker" profile={profile} cwd="/repo" nodeId="node-1" sessionId={null} conversationId="missing-conversation" onSessionId={vi.fn()} onConversationId={vi.fn()} />
      </DIProvider>,
    );
    expect(await screen.findByText("Cette conversation est introuvable dans le stockage disponible.")).toBeTruthy();
    expect(agent.launchAgentChat).toHaveBeenCalledTimes(1);
    expect(screen.getByRole("button", { name: "Réessayer" })).toBeTruthy();
  });

  it("projects self-restart lifecycle separators in the custom CLI only once", async () => {
    const system = new MockSystemGateway();
    const agent = {
      launchAgentChat: vi.fn(async () => ({ sessionId: "chat-session-restart" })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider gateways={{ agent, system } as unknown as Gateways}>
        <AnnouncementsProvider projectId="project-1">
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId={null}
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </AnnouncementsProvider>
      </DIProvider>,
    );
    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalled());

    act(() => {
      system.emit({
        type: "agentRestartRequested",
        agentId: "agent-1",
        restartId: "restart-1",
        reason: null,
      });
      system.emit({
        type: "agentRestartCompleted",
        agentId: "agent-1",
        restartId: "restart-1",
      });
    });

    expect(
      await screen.findByText("------- redemarrage de l'agent -------"),
    ).not.toBeNull();
    expect(
      screen.getByText("------- redemarrage de l'agent termine -------"),
    ).not.toBeNull();
    expect(screen.getAllByTestId("agent-restart-separator")).toHaveLength(2);

    act(() => {
      system.emit({
        type: "agentRestartCompleted",
        agentId: "agent-1",
        restartId: "restart-1",
      });
    });
    expect(screen.getAllByTestId("agent-restart-separator")).toHaveLength(2);

    act(() => {
      system.emit({
        type: "agentRestartRequested",
        agentId: "agent-1",
        restartId: "restart-2",
        reason: "new capability",
      });
      system.emit({
        type: "agentRestartFailed",
        agentId: "agent-1",
        restartId: "restart-2",
        phase: "launching",
        message: "runtime unavailable",
      });
    });
    expect(
      screen.getByText("------- redemarrage de l'agent echoue -------"),
    ).not.toBeNull();
    expect(screen.getByText("runtime unavailable")).not.toBeNull();
  });

  it("reconciles a restarted chat to its replacement session and keeps receiving chunks", async () => {
    const system = new MockSystemGateway();
    const liveReceivers: Array<(chunk: ReplyChunk) => void> = [];
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi
        .fn()
        .mockImplementationOnce(
          async (_sessionId: string, onChunk: (chunk: ReplyChunk) => void) => {
            liveReceivers.push(onChunk);
            return {
              sessionId: "old-session",
              conversationId: "old-conversation",
              scrollback: [{ kind: "final", content: "Avant redémarrage" }],
            };
          },
        )
        .mockImplementationOnce(
          async (_sessionId: string, onChunk: (chunk: ReplyChunk) => void) => {
            liveReceivers.push(onChunk);
            return {
              sessionId: "replacement-session",
              conversationId: "replacement-conversation",
              scrollback: [
                { kind: "final", content: "Avant redémarrage" },
                { kind: "userPrompt", text: "Continue" },
                { kind: "textDelta", text: "Reprise conservée" },
              ],
            };
          },
        ),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();
    const onConversationId = vi.fn();

    render(
      <DIProvider gateways={{ agent, system } as unknown as Gateways}>
        <AnnouncementsProvider projectId="project-1">
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="old-session"
            conversationId="old-conversation"
            onSessionId={onSessionId}
            onConversationId={onConversationId}
          />
        </AnnouncementsProvider>
      </DIProvider>,
    );

    expect(await screen.findByText("Avant redémarrage")).toBeTruthy();
    act(() => {
      system.emit({
        type: "agentRestartRequested",
        agentId: "agent-1",
        restartId: "restart-295",
        reason: "reload plugin",
      });
      system.emit({
        type: "agentRestartCompleted",
        agentId: "agent-1",
        restartId: "restart-295",
      });
    });

    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      2,
      "old-session",
      expect.any(Function),
      { projectId: "project-1", agentId: "agent-1" },
    );
    expect(await screen.findByText("Reprise conservée")).toBeTruthy();
    expect(onSessionId).toHaveBeenCalledWith("replacement-session");
    expect(onConversationId).toHaveBeenCalledWith("replacement-conversation");

    act(() => {
      liveReceivers[1]?.({ kind: "final", content: "Chunk après redémarrage" });
    });
    expect(await screen.findByText("Chunk après redémarrage")).toBeTruthy();
    expect(screen.queryByText(/Envoyez un message/)).toBeNull();
  });

  it("retries a stale session attach with stable project and agent identity", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce({ code: "NOT_FOUND", message: "stale session" })
        .mockResolvedValueOnce({
          sessionId: "replacement-session",
          conversationId: "replacement-conversation",
          scrollback: [{ kind: "final", content: "Transcript restauré" }],
        }),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{ agent, system: new MockSystemGateway() } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect(await screen.findByText("Transcript restauré")).toBeTruthy();
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      2,
      "stale-session",
      expect.any(Function),
      { projectId: "project-1", agentId: "agent-1" },
    );
    expect(agent.launchAgentChat).not.toHaveBeenCalled();
    expect(onSessionId).toHaveBeenCalledWith("replacement-session");
  });

  it("shows the technical open failure on mobile with retry and native TUI fallback", async () => {
    const openNativeTui = vi.fn();
    const agent = {
      launchAgentChat: vi
        .fn()
        .mockRejectedValueOnce(new Error("spawn codex ENOENT"))
        .mockResolvedValueOnce({ sessionId: "chat-session-1" }),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId={null}
          mobile
          onOpenNativeTui={openNativeTui}
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const alert = await screen.findByRole("alert");
    expect(within(alert).getByText("Le CLI custom n'a pas pu démarrer.")).toBeTruthy();
    expect(within(alert).getByText("Cause: spawn codex ENOENT")).toBeTruthy();
    expect(screen.queryByText(/Vérifiez la configuration du profil/)).toBeNull();

    fireEvent.click(within(alert).getByRole("button", { name: "Ouvrir en TUI native" }));
    expect(openNativeTui).toHaveBeenCalledTimes(1);

    fireEvent.click(within(alert).getByRole("button", { name: "Réessayer" }));
    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(2));
    await waitFor(() => expect(screen.queryByRole("alert")).toBeNull());
  });

  it("uses the same technical open failure on desktop", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => {
        throw new Error("permission denied: /opt/codex");
      }),
      reattachAgentChat: vi.fn(),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId={null}
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const alert = await screen.findByRole("alert");
    expect(within(alert).getByText("Cause: permission denied: /opt/codex")).toBeTruthy();
    expect(screen.getByRole("button", { name: "Réessayer" })).toBeTruthy();
    expect(screen.queryByRole("button", { name: "Ouvrir en TUI native" })).toBeNull();
  });

  it("recalls previously sent prompts with arrow up and down", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        async (_sessionId: string, prompt: string, onChunk: (chunk: ReplyChunk) => void) => {
          onChunk({ kind: "final", content: `answer ${prompt}` });
        },
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          layoutId="layout-1"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const composer = await screen.findByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalled());

    fireEvent.change(composer, { target: { value: "first prompt" } });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "first prompt",
      expect.any(Function),
    ));

    fireEvent.change(composer, { target: { value: "second prompt" } });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "second prompt",
      expect.any(Function),
    ));

    fireEvent.keyDown(composer, { key: "ArrowUp" });
    await waitFor(() => expect(composer.value).toBe("second prompt"));
    fireEvent.keyDown(composer, { key: "ArrowUp" });
    await waitFor(() => expect(composer.value).toBe("first prompt"));
    fireEvent.keyDown(composer, { key: "ArrowDown" });
    await waitFor(() => expect(composer.value).toBe("second prompt"));

    fireEvent.change(composer, { target: { value: "draft in progress" } });
    fireEvent.keyDown(composer, { key: "ArrowUp" });
    await waitFor(() => expect(composer.value).toBe("second prompt"));
    fireEvent.keyDown(composer, { key: "ArrowDown" });
    await waitFor(() => expect(composer.value).toBe("draft in progress"));
  });

  it("recalls history from the exact end of a multiline draft and restores it verbatim", async () => {
    const agent = renderHistoryChat();
    const composer = (await screen.findByLabelText(
      /message CLI custom/,
    )) as HTMLTextAreaElement;
    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalled());
    await sendHistoryPrompt(composer, agent, "historic prompt");

    const multilineDraft = "ligne 1\nligne 2\nfin 🧪  ";
    fireEvent.change(composer, { target: { value: multilineDraft } });
    composer.setSelectionRange(multilineDraft.length, multilineDraft.length);
    Object.defineProperty(composer, "scrollHeight", {
      value: 480,
      configurable: true,
    });
    composer.scrollTop = 0;

    expect(fireEvent.keyDown(composer, { key: "ArrowUp" })).toBe(false);
    await waitFor(() => expect(composer.value).toBe("historic prompt"));
    expect(composer.selectionStart).toBe(composer.value.length);
    expect(composer.selectionEnd).toBe(composer.value.length);
    expect(composer.scrollTop).toBe(480);

    expect(fireEvent.keyDown(composer, { key: "ArrowDown" })).toBe(false);
    await waitFor(() => expect(composer.value).toBe(multilineDraft));
    expect(composer.selectionStart).toBe(multilineDraft.length);
    expect(composer.selectionEnd).toBe(multilineDraft.length);
    expect(composer.scrollTop).toBe(480);
  });

  it("keeps ArrowUp native away from a simple end caret or during modified/IME input", async () => {
    const agent = renderHistoryChat();
    const composer = (await screen.findByLabelText(
      /message CLI custom/,
    )) as HTMLTextAreaElement;
    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalled());
    await sendHistoryPrompt(composer, agent, "historic prompt");

    const draft = "première\ndeuxième";
    const nativeCases: Array<{
      selection: [number, number];
      event?: Record<string, unknown>;
    }> = [
      { selection: [4, 4] },
      { selection: [0, draft.length] },
      { selection: [draft.length, draft.length], event: { shiftKey: true } },
      { selection: [draft.length, draft.length], event: { ctrlKey: true } },
      { selection: [draft.length, draft.length], event: { altKey: true } },
      { selection: [draft.length, draft.length], event: { metaKey: true } },
      { selection: [draft.length, draft.length], event: { isComposing: true } },
      { selection: [draft.length, draft.length], event: { keyCode: 229 } },
    ];
    for (const testCase of nativeCases) {
      fireEvent.change(composer, { target: { value: draft } });
      composer.setSelectionRange(...testCase.selection);
      expect(
        fireEvent.keyDown(composer, { key: "ArrowUp", ...testCase.event }),
      ).toBe(true);
      expect(composer.value).toBe(draft);
    }

    composer.setSelectionRange(draft.length, draft.length);
    expect(fireEvent.keyDown(composer, { key: "ArrowUp" })).toBe(false);
    await waitFor(() => expect(composer.value).toBe("historic prompt"));
  });

  it("does not consume ArrowUp with empty history and never mutates recalled entries", async () => {
    const agent = renderHistoryChat();
    const composer = (await screen.findByLabelText(
      /message CLI custom/,
    )) as HTMLTextAreaElement;
    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalled());

    expect(fireEvent.keyDown(composer, { key: "ArrowUp" })).toBe(true);
    await sendHistoryPrompt(composer, agent, "original history");
    fireEvent.keyDown(composer, { key: "ArrowUp" });
    await waitFor(() => expect(composer.value).toBe("original history"));

    fireEvent.change(composer, { target: { value: "edited recall" } });
    composer.setSelectionRange(composer.value.length, composer.value.length);
    fireEvent.keyDown(composer, { key: "ArrowUp" });
    await waitFor(() => expect(composer.value).toBe("original history"));

    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(composer.value).toBe("");
    expect(fireEvent.keyDown(composer, { key: "ArrowDown" })).toBe(true);
  });

  it("persists prompt history across a custom chat remount", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        async (_sessionId: string, prompt: string, onChunk: (chunk: ReplyChunk) => void) => {
          onChunk({ kind: "final", content: `answer ${prompt}` });
        },
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const props = {
      projectId: "project-1",
      agentId: "agent-1",
      agentName: "Worker",
      profile,
      cwd: "/repo",
      layoutId: "layout-1",
      nodeId: "node-1",
      sessionId: "chat-session-1",
      conversationId: "conversation-1",
      onSessionId: vi.fn(),
      onConversationId: vi.fn(),
    };

    const view = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    let composer = await screen.findByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "remember me" } });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "remember me",
      expect.any(Function),
    ));

    view.unmount();
    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    composer = await screen.findByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.keyDown(composer, { key: "ArrowUp" });
    await waitFor(() => expect(composer.value).toBe("remember me"));
  });

  it("repaints attachment labels from user prompt scrollback", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [
          {
            kind: "userPrompt" as const,
            text: "describe this",
            attachments: ["clipboard.png"],
          },
        ],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect(await screen.findByText("describe this")).toBeTruthy();
    expect(screen.getByText("Fichier: clipboard.png")).toBeTruthy();
  });

  it("renders local reception time in message meta without changing streamed turn grouping", async () => {
    const userReceivedAtMs = new Date("2026-08-15T13:05:00.000Z").getTime();
    const firstDeltaReceivedAtMs = new Date("2026-08-15T13:06:00.000Z").getTime();
    const finalChunkReceivedAtMs = new Date("2026-08-15T13:07:00.000Z").getTime();
    let nowMs = userReceivedAtMs;
    const nowSpy = vi.spyOn(Date, "now").mockImplementation(() => nowMs);
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
        nowMs = firstDeltaReceivedAtMs;
        onChunk({ kind: "textDelta", text: "Streaming reply", atMs: firstDeltaReceivedAtMs });
        nowMs = finalChunkReceivedAtMs;
        onChunk({ kind: "final", content: "Completed reply", atMs: finalChunkReceivedAtMs });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    try {
      render(
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>,
      );

      await waitFor(() =>
        expect(agent.reattachAgentChat).toHaveBeenCalledWith(
          "chat-session-1",
          expect.any(Function),
        ),
      );

      fireEvent.change(screen.getByLabelText(/message CLI custom/), {
        target: { value: "Initial prompt" },
      });
      nowMs = userReceivedAtMs;
      fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

      const userBubble = (await screen.findByText("Initial prompt")).closest("div");
      const agentBubble = screen.getByText("Streaming reply").closest("div");
      const finalBubble = screen.getByText("Completed reply").closest("div");

      expect(userBubble).toBeTruthy();
      expect(agentBubble).toBeTruthy();
      expect(finalBubble).toBeTruthy();
      expect(within(userBubble!).getByLabelText("Heure indisponible")).toBeTruthy();
      expect(
        within(agentBubble!).getByText(expectedChatTime(firstDeltaReceivedAtMs)),
      ).toBeTruthy();
      expect(
        within(finalBubble!).getByText(expectedChatTime(finalChunkReceivedAtMs)),
      ).toBeTruthy();
      expect(screen.getByText("Streaming reply")).toBeTruthy();
      expect(screen.getByText("Completed reply")).toBeTruthy();
      expect(screen.getByText(expectedChatTime(finalChunkReceivedAtMs))).toBeTruthy();
    } finally {
      nowSpy.mockRestore();
    }
  });

  it("keeps a single reception time on error bubbles using the first streamed chunk time", async () => {
    const userReceivedAtMs = new Date("2026-08-15T13:05:00.000Z").getTime();
    const firstDeltaReceivedAtMs = new Date("2026-08-15T13:06:00.000Z").getTime();
    const errorReceivedAtMs = new Date("2026-08-15T13:07:00.000Z").getTime();
    let nowMs = userReceivedAtMs;
    const nowSpy = vi.spyOn(Date, "now").mockImplementation(() => nowMs);
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
        nowMs = firstDeltaReceivedAtMs;
        onChunk({ kind: "textDelta", text: "Streaming reply", atMs: firstDeltaReceivedAtMs });
        nowMs = errorReceivedAtMs;
        onChunk({ kind: "error", message: "Broken reply", atMs: errorReceivedAtMs });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    try {
      render(
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>,
      );

      await waitFor(() =>
        expect(agent.reattachAgentChat).toHaveBeenCalledWith(
          "chat-session-1",
          expect.any(Function),
        ),
      );

      fireEvent.change(screen.getByLabelText(/message CLI custom/), {
        target: { value: "Initial prompt" },
      });
      nowMs = userReceivedAtMs;
      fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

      const agentBubble = (await screen.findByText("Streaming reply")).closest("div");
      const errorBubble = screen.getByText("Broken reply").closest("div");

      expect(agentBubble).toBeTruthy();
      expect(errorBubble).toBeTruthy();
      expect(within(errorBubble!).getByText("Session Codex")).toBeTruthy();
      expect(
        within(agentBubble!).getByText(expectedChatTime(firstDeltaReceivedAtMs)),
      ).toBeTruthy();
      expect(
        within(errorBubble!).getByText(expectedChatTime(errorReceivedAtMs)),
      ).toBeTruthy();
      expect(screen.getByText(expectedChatTime(errorReceivedAtMs))).toBeTruthy();
    } finally {
      nowSpy.mockRestore();
    }
  });

  it("replays scrollback with the current reception time instead of the reduce index", async () => {
    const replayReceivedAtMs = new Date("2026-08-15T13:08:00.000Z").getTime();
    const indexOneTime = expectedChatTime(1);
    const nowSpy = vi.spyOn(Date, "now").mockReturnValue(replayReceivedAtMs);
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [
          { kind: "userPrompt" as const, text: "Replay prompt" },
          { kind: "textDelta" as const, text: "Replay answer" },
          { kind: "final" as const, content: "Replay completed" },
        ],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    try {
      render(
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>,
      );

      const agentBubble = (await screen.findByText("Replay answer")).closest("div");
      const finalBubble = screen.getByText("Replay completed").closest("div");

      expect(agentBubble).toBeTruthy();
      expect(finalBubble).toBeTruthy();
      expect(within(agentBubble!).getByLabelText("Heure indisponible")).toBeTruthy();
      expect(within(finalBubble!).getByLabelText("Heure indisponible")).toBeTruthy();
      expect(within(agentBubble!).queryByText(indexOneTime)).toBeNull();
      expect(within(finalBubble!).queryByText(indexOneTime)).toBeNull();
    } finally {
      nowSpy.mockRestore();
    }
  });

  it("resizes the composer vertically with mouse, keyboard, and double-click reset", async () => {
    const rectSpy = vi
      .spyOn(HTMLElement.prototype, "getBoundingClientRect")
      .mockReturnValue({
        x: 0,
        y: 0,
        width: 600,
        height: 400,
        top: 0,
        right: 600,
        bottom: 400,
        left: 0,
        toJSON: () => {},
      } as DOMRect);
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    function Harness() {
      const [height, setHeight] = useState(64);
      return (
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            composerHeightPx={height}
            composerDefaultHeightPx={64}
            onComposerHeightPxChange={setHeight}
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>
      );
    }

    try {
      render(<Harness />);
      const composer = await screen.findByLabelText(/message CLI custom/) as HTMLTextAreaElement;
      const handle = screen.getByRole("button", {
        name: "redimensionner le composer node-1",
      });
      expect(composer.style.height).toBe("64px");
      expect(handle.style.cursor).toBe("ns-resize");

      fireEvent.mouseDown(handle, { clientY: 200 });
      fireEvent.mouseMove(window, { clientY: 100 });
      fireEvent.mouseUp(window);
      await waitFor(() => expect(composer.style.height).toBe("164px"));

      fireEvent.keyDown(handle, { key: "ArrowUp", shiftKey: true });
      await waitFor(() => expect(composer.style.height).toBe("176px"));
      fireEvent.keyDown(handle, { key: "ArrowDown", shiftKey: true });
      await waitFor(() => expect(composer.style.height).toBe("164px"));

      fireEvent.mouseDown(handle, { clientY: 200 });
      fireEvent.mouseMove(window, { clientY: -200 });
      fireEvent.mouseUp(window);
      await waitFor(() => expect(composer.style.height).toBe("200px"));

      fireEvent.doubleClick(handle);
      await waitFor(() => expect(composer.style.height).toBe("64px"));
    } finally {
      rectSpy.mockRestore();
    }
  });

  it("detaches on unmount then reattaches with missed scrollback chunks", async () => {
    let scrollback: ReplyChunk[] = [
      { kind: "userPrompt" as const, text: "Initial prompt" },
      { kind: "textDelta" as const, text: "Initial reply" },
    ];
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback,
      })),
      detachAgentChat: vi.fn(async () => {}),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const props = {
      projectId: "project-1",
      agentId: "agent-1",
      agentName: "Worker",
      profile,
      cwd: "/repo",
      nodeId: "node-1",
      sessionId: "chat-session-1",
      conversationId: "conversation-1",
      onSessionId: vi.fn(),
      onConversationId: vi.fn(),
    };

    const first = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    expect(await screen.findByText("Initial reply")).toBeTruthy();
    first.unmount();
    await waitFor(() => expect(agent.detachAgentChat).toHaveBeenCalledWith("chat-session-1"));

    scrollback = [
      ...scrollback,
      { kind: "toolActivity" as const, label: "Background tool" },
      { kind: "final" as const, content: "Completed away" },
    ];

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    expect(screen.getByText("Initial reply")).toBeTruthy();
    expect(await screen.findByText("Background tool")).toBeTruthy();
    expect(screen.getByText("Completed away")).toBeTruthy();
    expect(
      screen.queryByText(/Reprise effectuée:/),
    ).toBeNull();
  });

  it("keeps the composer locked on layout return until reattach replay settles (#190)", async () => {
    let scrollback: ReplyChunk[] = [
      { kind: "userPrompt" as const, text: "Initial prompt" },
      { kind: "final" as const, content: "Initial reply" },
    ];
    const secondReattach = deferred<{ sessionId: string; scrollback: ReplyChunk[] }>();
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi
        .fn()
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback,
        }))
        .mockImplementationOnce(() => secondReattach.promise),
      detachAgentChat: vi.fn(async () => {}),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const props = {
      projectId: "project-1",
      agentId: "agent-1",
      agentName: "Worker",
      profile,
      cwd: "/repo",
      nodeId: "node-1",
      sessionId: "chat-session-1",
      conversationId: "conversation-1",
      onSessionId: vi.fn(),
      onConversationId: vi.fn(),
    };

    const first = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    expect(await screen.findByText("Initial reply")).toBeTruthy();
    first.unmount();
    await waitFor(() => expect(agent.detachAgentChat).toHaveBeenCalledWith("chat-session-1"));

    scrollback = [
      { kind: "userPrompt" as const, text: "Initial prompt" },
      { kind: "final" as const, content: "Initial reply" },
      { kind: "userPrompt" as const, text: "Question during graph view" },
      { kind: "textDelta" as const, text: "Partial answer while away" },
    ];

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    expect(screen.getByText("Initial reply")).toBeTruthy();
    expect(screen.getByRole("button", { name: "Envoyer" }).hasAttribute("disabled")).toBe(true);
    expect(screen.getByLabelText(/message CLI custom/).hasAttribute("disabled")).toBe(true);

    act(() => {
      secondReattach.resolve({ sessionId: "chat-session-1", scrollback });
    });

    expect(await screen.findByText("Question during graph view")).toBeTruthy();
    expect(screen.getByText("Partial answer while away")).toBeTruthy();
    expect(screen.queryByText(/Reprise effectuée:/)).toBeNull();
    expect(screen.getByRole("button", { name: "Stop" })).toBeTruthy();
    expect(screen.getByLabelText(/message CLI custom/).hasAttribute("disabled")).toBe(true);
  });

  it("restores visible conversation from conversationId cache when layout returns before sessionId", async () => {
    let scrollback: ReplyChunk[] = [
      { kind: "userPrompt" as const, text: "Initial prompt" },
      { kind: "final" as const, content: "Initial reply" },
    ];
    const secondReattach = deferred<{ sessionId: string; scrollback: ReplyChunk[] }>();
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi
        .fn()
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback,
        }))
        .mockImplementationOnce(() => secondReattach.promise),
      detachAgentChat: vi.fn(async () => {}),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const props = {
      projectId: "project-1",
      agentId: "agent-1",
      agentName: "Worker",
      profile,
      cwd: "/repo",
      nodeId: "node-1",
      sessionId: "chat-session-1" as string | null,
      conversationId: "conversation-1",
      onSessionId: vi.fn(),
      onConversationId: vi.fn(),
    };

    const first = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} />
      </DIProvider>,
    );

    expect(await screen.findByText("Initial reply")).toBeTruthy();
    first.unmount();
    await waitFor(() => expect(agent.detachAgentChat).toHaveBeenCalledWith("chat-session-1"));

    scrollback = [
      { kind: "userPrompt" as const, text: "Initial prompt" },
      { kind: "final" as const, content: "Initial reply" },
      { kind: "userPrompt" as const, text: "Question during graph view" },
      { kind: "final" as const, content: "Answer restored from replay" },
    ];

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView {...props} sessionId={null} />
      </DIProvider>,
    );

    expect(screen.getByText("Initial reply")).toBeTruthy();
    expect(agent.launchAgentChat).not.toHaveBeenCalled();
    expect(screen.getByRole("button", { name: "Envoyer" }).hasAttribute("disabled")).toBe(true);

    act(() => {
      secondReattach.resolve({ sessionId: "chat-session-1", scrollback });
    });

    expect(await screen.findByText("Answer restored from replay")).toBeTruthy();
    expect(screen.getByText("Question during graph view")).toBeTruthy();
    expect(agent.launchAgentChat).not.toHaveBeenCalled();
  });

  it("drops a stale no-response chunk when replay contains a later real answer (#190)", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [
          { kind: "userPrompt" as const, text: "resume the turn" },
          {
            kind: "error" as const,
            message: "Le modèle n'a renvoyé aucune réponse.",
          },
          { kind: "textDelta" as const, text: "Real answer " },
          { kind: "final" as const, content: "Real answer completed" },
        ],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect(await screen.findByText("Real answer completed")).toBeTruthy();
    expect(screen.getByText("Real answer")).toBeTruthy();
    expect(screen.queryByText("Le modèle n'a renvoyé aucune réponse.")).toBeNull();
  });

  it("cancels only the current request and keeps the structured session usable", async () => {
    let resolveCancel: () => void = () => {};
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi
        .fn()
        .mockImplementationOnce(() => new Promise<void>(() => {}))
        .mockImplementationOnce(async (_sessionId: string, _prompt: string, onChunk) => {
          onChunk({ kind: "final", content: "Next answer" });
        }),
      stopLiveAgent: vi.fn(),
      cancelAgentChat: vi.fn(
        () =>
          new Promise<void>((resolve) => {
            resolveCancel = resolve;
          }),
      ),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first turn" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() =>
      expect(agent.sendAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        "first turn",
        expect.any(Function),
      ),
    );
    expect(hasProjectCliInteraction("project-1")).toBe(true);
    expect(screen.queryByRole("button", { name: "Cancel" })).toBeNull();

    fireEvent.click(await screen.findByRole("button", { name: "Stop" }));

    const stoppingLabel = await screen.findByText("Stopping...");
    expect(stoppingLabel.closest("button")?.hasAttribute("disabled")).toBe(true);
    fireEvent.click(stoppingLabel.closest("button")!);
    await waitFor(() =>
      expect(agent.cancelAgentChat).toHaveBeenCalledWith("chat-session-1"),
    );
    expect(agent.cancelAgentChat).toHaveBeenCalledTimes(1);
    resolveCancel();
    await waitFor(() => expect(screen.getByText("Request stopped.")).toBeTruthy());
    expect(hasProjectCliInteraction("project-1")).toBe(false);
    expect(onSessionId).not.toHaveBeenCalledWith(null);
    expect(agent.stopLiveAgent).not.toHaveBeenCalled();
    expect(agent.closeAgentChat).not.toHaveBeenCalled();
    const composer = screen.getByLabelText(/message CLI custom/);
    expect(composer).toHaveProperty("disabled", false);

    fireEvent.change(composer, {
      target: { value: "next turn" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      2,
      "chat-session-1",
      "next turn",
      expect.any(Function),
    );
    expect(await screen.findByText("Next answer")).toBeTruthy();
  });

  it("keeps the composer locked from canonical work-state busy even without local stream activity", async () => {
    const system = new MockSystemGateway();
    const workState = new MockWorkStateGateway();
    workState._setProjectWorkState("project-1", {
      agents: [
        {
          agentId: "agent-1",
          name: "Main",
          profileId: "structured",
          busy: { state: "busy", ticket: "turn-1", sinceMs: 1 },
          tickets: [],
        },
      ],
      conversations: [],
    });
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      stopLiveAgent: vi.fn(async () => ({
        agentId: "agent-1",
        sessionId: "chat-session-1",
        kind: "structured" as const,
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system,
          workState,
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Main"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const composer = await screen.findByLabelText(/message CLI custom/);
    await waitFor(() => expect(composer).toHaveProperty("disabled", true));
    expect(screen.getByRole("button", { name: "Stop" })).toBeTruthy();

    workState._setProjectWorkState("project-1", {
      agents: [
        {
          agentId: "agent-1",
          name: "Main",
          profileId: "structured",
          busy: { state: "idle" },
          tickets: [],
        },
      ],
      conversations: [],
    });
    system.emit({ type: "agentBusyChanged", agentId: "agent-1", busy: false });

    await waitFor(() => expect(composer).toHaveProperty("disabled", false));
    expect(screen.getByRole("button", { name: "Envoyer" })).toBeTruthy();
  });

  it("shows the requester as waiting on the delegated target and keeps input locked", async () => {
    const system = new MockSystemGateway();
    const workState = new MockWorkStateGateway();
    workState._setProjectWorkState("project-1", {
      agents: [
        {
          agentId: "main",
          name: "Main",
          profileId: "structured",
          busy: { state: "idle" },
          tickets: [],
        },
        {
          agentId: "architect",
          name: "Architect",
          profileId: "structured",
          busy: { state: "busy", ticket: "delegated-1", sinceMs: 1 },
          tickets: [
            {
              ticketId: "delegated-1",
              conversationId: "conversation-2",
              position: 0,
              status: "inProgress",
              source: { kind: "agent", agentId: "main" },
              requesterLabel: "Main",
              taskPreview: "Analyse l'architecture",
              taskLen: 22,
            },
          ],
        },
      ],
      conversations: [],
    });
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      stopLiveAgent: vi.fn(async () => ({
        agentId: "main",
        sessionId: "chat-session-1",
        kind: "structured" as const,
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system,
          workState,
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="main"
          agentName="Main"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect(await screen.findByText("Main attend Architect")).toBeTruthy();
    expect(screen.getByLabelText(/message CLI custom/)).toHaveProperty("disabled", true);
  });

  it("falls back to a fresh launch when reattach reports NOT_FOUND", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce({ code: "NOT_FOUND", message: "structured session gone" })
        .mockRejectedValueOnce({ code: "NOT_FOUND", message: "structured session gone" })
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback: [],
        })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.launchAgentChat).toHaveBeenCalledWith("project-1", "agent-1", {
        cwd: "/repo",
        rows: 24,
        cols: 80,
        conversationId: "conversation-1",
        nodeId: "node-1",
      }),
    );
    await waitFor(() =>
      expect(onSessionId).toHaveBeenCalledWith("chat-session-2"),
    );
    expect(screen.queryByText(/structured session gone/)).toBeNull();
  });

  it("does not duplicate the user prompt when the stream echoes it back", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
        onChunk({ kind: "userPrompt", text: "hello agent" });
        onChunk({ kind: "final", content: "done" });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "hello agent" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await screen.findByText("done");
    expect(hasProjectCliInteraction("project-1")).toBe(false);
    expect(screen.getAllByText("hello agent")).toHaveLength(1);
    expect(screen.getByText("Terminé").closest(".justify-end")).toBeTruthy();
  });

  it("keeps successive turns isolated when backend userPrompt echoes arrive after progress (#251)", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        async (_sessionId: string, prompt: string, onChunk: (chunk: ReplyChunk) => void) => {
          onChunk({
            kind: "progress",
            progress: {
              source: "providerNative",
              kind: "tool",
              stage: "started",
              label: "shell",
              toolName: "shell",
              text: `Running ${prompt}`,
            },
          });
          onChunk({ kind: "userPrompt", text: prompt });
          onChunk({
            kind: "progress",
            progress: {
              source: "providerNative",
              kind: "tool",
              stage: "completed",
              label: "shell",
              toolName: "shell",
              text: `Done ${prompt}`,
            },
          });
          onChunk({ kind: "final", content: `final ${prompt}` });
        },
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await screen.findByText("final first request");

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await screen.findByText("final second request");

    expect(screen.getAllByText("first request")).toHaveLength(1);
    expect(screen.getAllByText("second request")).toHaveLength(1);
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(2);
    expect(screen.queryByText("Running first request")).toBeNull();
    expect(screen.queryByText("Running second request")).toBeNull();
    expect(screen.getByText("Done first request")).toBeTruthy();
    expect(screen.getByText("Done second request")).toBeTruthy();
    expect(screen.getAllByText("Terminé")).toHaveLength(2);

    const firstPrompt = screen.getByText("first request");
    const firstProgress = screen.getByText("Done first request");
    const firstFinal = screen.getByText("final first request");
    const secondPrompt = screen.getByText("second request");
    const secondProgress = screen.getByText("Done second request");
    const secondFinal = screen.getByText("final second request");

    expect(
      Boolean(firstPrompt.compareDocumentPosition(firstProgress) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);
    expect(
      Boolean(firstProgress.compareDocumentPosition(firstFinal) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);
    expect(
      Boolean(firstFinal.compareDocumentPosition(secondPrompt) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);
    expect(
      Boolean(secondPrompt.compareDocumentPosition(secondProgress) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);
    expect(
      Boolean(secondProgress.compareDocumentPosition(secondFinal) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);
  });

  it("renders canonical progress chunks as live agent, MCP, and delegation activity", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
        onChunk({
          kind: "progress",
          progress: {
            source: "providerNative",
            kind: "turn",
            stage: "started",
            label: "turn.started",
            provider: "codex",
            nativeEvent: "turn.started",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "providerNative",
            kind: "message",
            stage: "delta",
            label: "Analyse",
            text: "Lecture du contexte disponible.",
            provider: "codex",
            nativeEvent: "agent.message.delta",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "ideaLocal",
            kind: "mcp",
            stage: "started",
            label: "idea_ticket_read",
            toolName: "idea_ticket_read",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "ideaLocal",
            kind: "mcp",
            stage: "started",
            label: "idea_ask_agent",
            text: "target=QA task=Valider le rendu progress",
            toolName: "idea_ask_agent",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "providerNative",
            kind: "turn",
            stage: "completed",
            label: "turn.completed",
            provider: "codex",
            nativeEvent: "turn.completed",
          },
        });
        onChunk({ kind: "final", content: "done" });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "ship progress UI" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await screen.findByText("Progress");
    expect(screen.getAllByTestId("chat-turn-marker")).toHaveLength(2);
    expect(screen.getByText("turn.started")).toBeTruthy();
    expect(screen.getByText("turn.completed")).toBeTruthy();
    expect(screen.getByText("Progress").closest("[data-testid='chat-progress-status']")).toBeTruthy();
    expect(screen.getByText("Analyse")).toBeTruthy();
    expect(screen.getByText("Lecture du contexte disponible.")).toBeTruthy();
    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("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);
  });

  it("renders repeated legacy tool progress as fresh activity on each turn", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async (_sessionId: string, prompt: string, onChunk) => {
        onChunk({
          kind: "progress",
          progress: {
            source: "ideaLocal",
            kind: "mcp",
            stage: "started",
            label: "idea_context_read",
            toolName: "idea_context_read",
            text: "Lecture du contexte",
          },
        });
        onChunk({
          kind: "progress",
          progress: {
            source: "ideaLocal",
            kind: "mcp",
            stage: "completed",
            label: "idea_context_read",
            toolName: "idea_context_read",
            text: "Lecture du contexte",
          },
        });
        onChunk({ kind: "final", content: `done ${prompt}` });
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await screen.findByText("done first");

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await screen.findByText("done second");

    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(2);
    expect(screen.getAllByText("idea_context_read")).toHaveLength(2);
  });

  it("surfaces second-turn streaming progress through a distinct callback after the first turn completed", async () => {
    const harness = createStreamingAgentHarness();

    render(
      <DIProvider
        gateways={{
          agent: harness.agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(harness.agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(1));

    act(() => {
      harness.emit(0, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "tool",
          stage: "started",
          label: "shell",
          toolName: "shell",
          text: "Running first request",
        },
      });
    });
    expect(screen.getByText("Running first request")).toBeTruthy();
    expect(screen.getByText("Tool").parentElement?.textContent).toContain("En cours");

    act(() => {
      harness.emit(0, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "tool",
          stage: "completed",
          label: "shell",
          toolName: "shell",
          text: "Done first request",
        },
      });
      harness.emit(0, { kind: "final", content: "final first request" });
    });
    await screen.findByText("final first request");

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(2));

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "message",
          stage: "delta",
          label: "Analyse",
          text: "Second request context loaded.",
        },
      });
    });
    expect(screen.getByText("Second request context loaded.")).toBeTruthy();
    expect(screen.getByText("Progress").parentElement?.textContent).toContain("En cours");

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_ticket_read",
          toolName: "idea_ticket_read",
          text: "Reading ticket for second request",
        },
      });
    });
    expect(screen.getByText("Reading ticket for second request")).toBeTruthy();
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(2);

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "completed",
          label: "idea_ticket_read",
          toolName: "idea_ticket_read",
          text: "Ticket read complete",
        },
      });
      harness.emit(1, { kind: "final", content: "final second request" });
    });

    await screen.findByText("final second request");
    expect(screen.getByText("Ticket read complete")).toBeTruthy();
    expect(screen.getByText("Second request context loaded.")).toBeTruthy();
    expect(screen.getAllByText("Terminé")).toHaveLength(2);
  });

  it("treats same-tool progress on the second turn as fresh streaming activity with a distinct callback", async () => {
    const harness = createStreamingAgentHarness();

    render(
      <DIProvider
        gateways={{
          agent: harness.agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(harness.agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(1));

    act(() => {
      harness.emit(0, {
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_context_read",
          toolName: "idea_context_read",
          text: "Reading shared context for first request",
        },
      });
      harness.emit(0, {
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "completed",
          label: "idea_context_read",
          toolName: "idea_context_read",
          text: "Context read complete for first request",
        },
      });
      harness.emit(0, { kind: "final", content: "done first request" });
    });
    await screen.findByText("done first request");

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(2));

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_context_read",
          toolName: "idea_context_read",
          text: "Reading shared context for second request",
        },
      });
    });
    expect(screen.getByText("Reading shared context for second request")).toBeTruthy();
    expect(screen.getAllByText("idea_context_read")).toHaveLength(2);

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "completed",
          label: "idea_context_read",
          toolName: "idea_context_read",
          text: "Context read complete for second request",
        },
      });
      harness.emit(1, { kind: "final", content: "done second request" });
    });

    await screen.findByText("done second request");
    expect(screen.getByText("Context read complete for second request")).toBeTruthy();
    expect(screen.getByText("Context read complete for first request")).toBeTruthy();
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(2);
  });

  it("keeps second-turn progress visible when the provider reuses the same progressId across turns", async () => {
    const harness = createStreamingAgentHarness();

    render(
      <DIProvider
        gateways={{
          agent: harness.agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(harness.agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(1));

    act(() => {
      harness.emit(0, {
        kind: "progress",
        progress: {
          progressId: "codex:item:call_1",
          source: "providerNative",
          kind: "tool",
          stage: "started",
          label: "shell",
          toolName: "shell",
          text: "Running first request",
        },
      });
      harness.emit(0, {
        kind: "progress",
        progress: {
          progressId: "codex:item:call_1",
          source: "providerNative",
          kind: "tool",
          stage: "completed",
          label: "shell",
          toolName: "shell",
          text: "Done first request",
        },
      });
      harness.emit(0, { kind: "final", content: "done first request" });
    });
    await screen.findByText("done first request");

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(2));

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          progressId: "codex:item:call_1",
          source: "providerNative",
          kind: "tool",
          stage: "started",
          label: "shell",
          toolName: "shell",
          text: "Running second request",
        },
      });
    });

    expect(screen.getByText("Running second request")).toBeTruthy();

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          progressId: "codex:item:call_1",
          source: "providerNative",
          kind: "tool",
          stage: "completed",
          label: "shell",
          toolName: "shell",
          text: "Done second request",
        },
      });
      harness.emit(1, { kind: "final", content: "done second request" });
    });

    await screen.findByText("done second request");
    expect(screen.getByText("Done first request")).toBeTruthy();
    expect(screen.getByText("Done second request")).toBeTruthy();
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(2);
  });

  it("ignores a late first-turn progress chunk but still shows the real second-turn progress from the next callback", async () => {
    const harness = createStreamingAgentHarness();

    render(
      <DIProvider
        gateways={{
          agent: harness.agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(harness.agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "first request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(1));

    act(() => {
      harness.emit(0, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "tool",
          stage: "started",
          label: "shell",
          toolName: "shell",
          text: "Running first request",
        },
      });
      harness.emit(0, { kind: "final", content: "done first request" });
    });
    await screen.findByText("done first request");

    act(() => {
      harness.emit(0, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "tool",
          stage: "completed",
          label: "shell",
          toolName: "shell",
          text: "Late first request completion",
        },
      });
    });
    expect(screen.queryByText("Late first request completion")).toBeNull();

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "second request" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(harness.emitterCount()).toBe(2));

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "tool",
          stage: "started",
          label: "shell",
          toolName: "shell",
          text: "Running second request",
        },
      });
    });
    expect(screen.getByText("Running second request")).toBeTruthy();

    act(() => {
      harness.emit(1, {
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "tool",
          stage: "completed",
          label: "shell",
          toolName: "shell",
          text: "Done second request",
        },
      });
      harness.emit(1, { kind: "final", content: "done second request" });
    });

    await screen.findByText("done second request");
    expect(screen.getByText("Done second request")).toBeTruthy();
    expect(screen.queryByText("Late first request completion")).toBeNull();
  });

  it("renders available pre-MCP progress before the first MCP card", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    const { container } = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "delegate after intent" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "message",
          stage: "delta",
          label: "Intention",
          text: "Je vais d'abord regarder les outils MCP disponibles.",
          provider: "codex",
          nativeEvent: "agent.message.delta",
        },
      });
    });

    expect(
      screen.getByText("Je vais d'abord regarder les outils MCP disponibles."),
    ).toBeTruthy();
    expect(screen.queryByText("idea_ask_agent")).toBeNull();

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_ask_agent",
          toolName: "idea_ask_agent",
        },
      });
    });

    const intent = screen.getByText(
      "Je vais d'abord regarder les outils MCP disponibles.",
    );
    const delegation = screen.getByText("idea_ask_agent");
    expect(
      Boolean(intent.compareDocumentPosition(delegation) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });
    await screen.findByText("done");
    expect(container.textContent).toContain("Je vais d'abord regarder");
  });

  it("deduplicates delegated tool progress from tap and authoritative stream", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "delegate once" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    const progress = (source: "providerNative" | "ideaLocal", stage: "started" | "completed") => ({
      kind: "progress" as const,
      progress: {
        source,
        kind: source === "ideaLocal" ? ("mcp" as const) : ("tool" as const),
        stage,
        label: "idea_ask_agent",
        text: stage === "started" ? "target=QA task=validate" : "reply delivered",
        provider: source === "providerNative" ? "opencode" : undefined,
        nativeEvent:
          source === "providerNative"
            ? stage === "started"
              ? "tool_use"
              : "tool_done"
            : stage === "started"
              ? "conversation.item.added"
              : "conversation.item.done",
        toolName: "idea_ask_agent",
      },
    });

    act(() => {
      emitChunk?.(progress("providerNative", "started"));
      emitChunk?.(progress("ideaLocal", "started"));
    });

    expect(screen.getByText("Worker → QA")).toBeTruthy();
    expect(screen.getByText("Worker → QA").parentElement?.textContent).toContain("En cours");
    expect(screen.queryByRole("status", { name: "Loading" })).toBeNull();

    act(() => {
      emitChunk?.(progress("providerNative", "completed"));
      emitChunk?.(progress("ideaLocal", "completed"));
      emitChunk?.(progress("providerNative", "started"));
      emitChunk?.(progress("ideaLocal", "started"));
      emitChunk?.(progress("providerNative", "completed"));
      emitChunk?.(progress("ideaLocal", "completed"));
      emitChunk?.({ kind: "final", content: "done" });
    });

    await screen.findByText("done");
    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(),
    );
  });

  it("keeps repeated MCP cycles visible when legacy progress has no progressId", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "read many tickets" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      for (let index = 1; index <= 8; index += 1) {
        emitChunk?.({
          kind: "progress" as const,
          progress: {
            source: "ideaLocal" as const,
            kind: "mcp" as const,
            stage: "started" as const,
            label: "idea_ticket_read",
            toolName: "idea_ticket_read",
            text: `reading ticket #${index}`,
          },
        });
        emitChunk?.({
          kind: "progress" as const,
          progress: {
            source: "ideaLocal" as const,
            kind: "mcp" as const,
            stage: "completed" as const,
            label: "idea_ticket_read",
            toolName: "idea_ticket_read",
            text: `read ticket #${index}`,
          },
        });
      }
      emitChunk?.({ kind: "final", content: "done" });
    });

    await screen.findByText("done");
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(8);
    expect(screen.getAllByText("MCP")).toHaveLength(8);
    expect(screen.getAllByText("idea_ticket_read")).toHaveLength(8);
    expect(screen.getByText("read ticket #1")).toBeTruthy();
    expect(screen.getByText("read ticket #8")).toBeTruthy();
    expect(screen.queryByText("reading ticket #1")).toBeNull();
  });

  it("deduplicates identical entity progress chunks", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "read ticket" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    const chunk = {
      kind: "progress" as const,
      progress: {
        source: "ideaLocal" as const,
        kind: "mcp" as const,
        stage: "started" as const,
        label: "idea_ticket_read",
        toolName: "idea_ticket_read",
      },
    };

    act(() => {
      emitChunk?.(chunk);
      emitChunk?.(chunk);
    });

    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(1);
    expect(screen.getAllByText("idea_ticket_read")).toHaveLength(1);
  });

  it("updates entity progress deltas in place", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "download model" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    const progress = (stage: "started" | "delta", text: string) => ({
      kind: "progress" as const,
      progress: {
        source: "providerNative" as const,
        kind: "tool" as const,
        stage,
        label: "download_model",
        toolName: "download_model",
        text,
      },
    });

    act(() => {
      emitChunk?.(progress("started", "Downloading 10%"));
      emitChunk?.(progress("delta", "Downloading 75%"));
    });

    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(1);
    expect(screen.queryByText("Downloading 10%")).toBeNull();
    expect(screen.getByText("Downloading 75%")).toBeTruthy();
    expect(screen.getByText("Tool").parentElement?.textContent).toContain("En cours");
  });

  it("expands only truncated MCP progress details and preserves expansion across updates", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "inspect mcp payloads" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({
        kind: "progress" as const,
        progress: {
          progressId: "mcp-large",
          source: "ideaLocal" as const,
          kind: "mcp" as const,
          stage: "started" as const,
          label: "idea_ticket_read",
          toolName: "idea_ticket_read",
          text: "line 1\nline 2\nline 3\nline 4\nline 5",
        },
      });
      emitChunk?.({
        kind: "progress" as const,
        progress: {
          progressId: "mcp-small",
          source: "ideaLocal" as const,
          kind: "mcp" as const,
          stage: "started" as const,
          label: "idea_memory_read",
          toolName: "idea_memory_read",
          text: "short payload",
        },
      });
    });

    const details = await screen.findAllByTestId("chat-progress-detail");
    expect(details).toHaveLength(2);
    setMeasuredTextOverflow(details[0], { scrollHeight: 120, clientHeight: 48 });
    setMeasuredTextOverflow(details[1], { scrollHeight: 24, clientHeight: 24 });

    const expand = await screen.findByRole("button", { name: "Afficher plus" });
    expect(expand.getAttribute("aria-expanded")).toBe("false");
    expect(expand.getAttribute("aria-controls")).toBe(details[0].id);
    expect(screen.queryAllByRole("button", { name: "Afficher plus" })).toHaveLength(1);

    fireEvent.click(expand);
    expect(
      screen.getByRole("button", { name: "Afficher moins" }).getAttribute("aria-expanded"),
    ).toBe("true");
    expect(screen.queryByRole("button", { name: "Afficher plus" })).toBeNull();

    act(() => {
      emitChunk?.({
        kind: "progress" as const,
        progress: {
          progressId: "mcp-large",
          source: "ideaLocal" as const,
          kind: "mcp" as const,
          stage: "delta" as const,
          label: "idea_ticket_read",
          toolName: "idea_ticket_read",
          text: "updated line 1\nupdated line 2\nupdated line 3\nupdated line 4\nupdated line 5",
        },
      });
    });

    expect(screen.getByText(/updated line 5/)).toBeTruthy();
    expect(
      screen.getByRole("button", { name: "Afficher moins" }).getAttribute("aria-expanded"),
    ).toBe("true");
    expect(screen.queryByRole("button", { name: "Afficher plus" })).toBeNull();
  });

  it("renders progress immediately when the chunk callback fires", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "stream progress" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({
        kind: "progress" as const,
        progress: {
          source: "providerNative" as const,
          kind: "tool" as const,
          stage: "started" as const,
          label: "stream_repo",
          toolName: "stream_repo",
          text: "Chunk received",
        },
      });
    });

    expect(screen.getByText("Chunk received")).toBeTruthy();
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(1);
  });

  it("upserts progress by progressId and keeps first emission chronological order", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "run tools" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    const progress = (
      progressId: string,
      occurredAtMs: number,
      stage: "started" | "completed",
      text: string,
    ) => ({
      kind: "progress" as const,
      progress: {
        progressId,
        occurredAtMs,
        source: "providerNative" as const,
        kind: "tool" as const,
        stage,
        label: "shell",
        toolName: "shell",
        text,
      },
    });

    act(() => {
      emitChunk?.(progress("process-2", 20, "started", "Process 2 start"));
      emitChunk?.(progress("process-1", 10, "started", "Process 1 start"));
      emitChunk?.(progress("process-1", 10, "completed", "Process 1 done"));
    });

    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(2);
    expect(screen.queryByText("Process 1 start")).toBeNull();
    expect(screen.getByText("Process 1 done")).toBeTruthy();
    const first = screen.getByText("Process 1 done");
    const second = screen.getByText("Process 2 start");
    expect(
      Boolean(first.compareDocumentPosition(second) & Node.DOCUMENT_POSITION_FOLLOWING),
    ).toBe(true);
  });

  it("moves completed entity progress from active map to turns", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "call tool" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    const progress = (stage: "started" | "completed") => ({
      kind: "progress" as const,
      progress: {
        source: "providerNative" as const,
        kind: "tool" as const,
        stage,
        label: "search_repo",
        toolName: "search_repo",
        text: stage === "started" ? "Searching..." : "Found results",
      },
    });

    act(() => {
      emitChunk?.(progress("started"));
      emitChunk?.(progress("completed"));
    });

    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(1);
    expect(screen.queryByText("Searching...")).toBeNull();
    expect(screen.getByText("Found results")).toBeTruthy();
    expect(screen.getByText("Tool").parentElement?.textContent).toContain("Terminé");

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });

    await screen.findByText("done");
    expect(screen.getAllByTestId("chat-tool-progress")).toHaveLength(1);
    expect(screen.getByText("Found results")).toBeTruthy();
  });

  it("renders running progress without spinner and marks it done on final", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "ship progress UI" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "providerNative",
          kind: "message",
          stage: "delta",
          label: "Analyse",
          text: "Lecture du contexte disponible.",
        },
      });
    });

    expect(screen.queryByRole("status", { name: "Loading" })).toBeNull();
    expect(screen.getByText("Progress").parentElement?.textContent).toContain("En cours");

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });

    await screen.findByText("done");
    await waitFor(() =>
      expect(screen.queryByRole("status", { name: "Loading" })).toBeNull(),
    );
    expect(screen.getByText("Lecture du contexte disponible.")).toBeTruthy();
    expect(screen.getByText("Progress").parentElement?.textContent).toContain("Terminé");
  });

  it("ignores late progress chunks after the final answer without reopening the turn", async () => {
    let emitChunk: ((chunk: unknown) => void) | null = null;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(
        (_sessionId: string, _prompt: string, onChunk: (chunk: unknown) => void) =>
          new Promise<void>((resolve) => {
            emitChunk = (chunk: unknown) => {
              onChunk(chunk);
              if ((chunk as { kind?: string }).kind === "final") resolve();
            };
          }),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "ship ordered stream" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(emitChunk).not.toBeNull());

    act(() => {
      emitChunk?.({ kind: "final", content: "done" });
    });
    await screen.findByText("done");

    act(() => {
      emitChunk?.({
        kind: "progress",
        progress: {
          source: "ideaLocal",
          kind: "mcp",
          stage: "started",
          label: "idea_ticket_read",
          toolName: "idea_ticket_read",
        },
      });
    });

    expect(screen.getByText("done")).toBeTruthy();
    expect(screen.queryByText("idea_ticket_read")).toBeNull();
    expect(screen.getByRole("button", { name: "Envoyer" })).toBeTruthy();
    expect(screen.queryByRole("button", { name: "Stop" })).toBeNull();
  });

  it("shows slash-command suggestions from the gateway, filters by prefix, and inserts the selected command", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      listSlashCommands: vi.fn(async (prefix?: string) =>
        [
          {
            name: "/clean",
            shortDescription: "Nettoyer la conversation courante",
            requiresConfirmation: false,
            availability: { status: "available" as const },
            source: "native" as const,
            native: "clean" as const,
          },
          {
            name: "/commit",
            shortDescription: "Préparer un commit",
            requiresConfirmation: true,
            availability: { status: "available" as const },
            source: { plugin: { pluginId: "git" } },
          },
        ].filter((command) => !prefix || command.name.startsWith(prefix)),
      ),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/c" } });

    const menu = await screen.findByRole("listbox", {
      name: "suggestions commandes slash",
    });
    expect(agent.listSlashCommands).toHaveBeenLastCalledWith("/c");
    expect(screen.getByRole("option", { name: /\/clean/ })).toBeTruthy();
    expect(screen.getByRole("option", { name: /\/commit/ })).toBeTruthy();

    fireEvent.keyDown(composer, { key: "ArrowUp" });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() => expect(composer.value).toBe("/commit "));
    expect(menu).toBeTruthy();
    expect(screen.queryByRole("listbox", { name: "suggestions commandes slash" })).toBeNull();
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
  });

  it("only opens slash-command suggestions at the start of an unfinished slash token", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      listSlashCommands: vi.fn(async () => [
        {
          name: "/clean",
          shortDescription: "Nettoyer la conversation courante",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "clean" as const,
        },
      ]),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "hello /c" } });
    expect(screen.queryByRole("listbox", { name: "suggestions commandes slash" })).toBeNull();
    expect(agent.listSlashCommands).not.toHaveBeenCalled();

    fireEvent.change(composer, { target: { value: "/" } });
    await screen.findByRole("listbox", { name: "suggestions commandes slash" });

    fireEvent.change(composer, { target: { value: "/clean now" } });
    expect(screen.queryByRole("listbox", { name: "suggestions commandes slash" })).toBeNull();
  });

  it("dispatches plugin slash-command callback effects through the plugin runtime", async () => {
    const commandHandler = vi.fn(async () => {});
    const registry = new PluginRuntimeRegistry();
    addPluginCommand(
      registry,
      "dev.acme.explain",
      "dev.acme.explain.run",
      commandHandler,
    );
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async (_name: string, options) => ({
        command: {
          name: "/explain",
          shortDescription: "Explain selection",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: { plugin: { pluginId: "dev.acme.explain" } },
          plugin: {
            pluginId: "dev.acme.explain",
            commandId: "dev.acme.explain.run",
          },
        },
        effect: {
          kind: "pluginCallback" as const,
          pluginId: "dev.acme.explain",
          commandId: "dev.acme.explain.run",
          sessionId: options.sessionId,
          arguments: options.arguments ?? [],
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <PluginRuntimeProvider
          value={{ registry, failures: [], pending: [], loading: false }}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </PluginRuntimeProvider>
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/explain focus this" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/explain", {
        sessionId: "chat-session-1",
        arguments: ["focus this"],
      }),
    );
    await waitFor(() => expect(commandHandler).toHaveBeenCalledWith("focus this"));
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
    expect(
      await screen.findByText("Commande plugin /explain exécutée."),
    ).toBeTruthy();
    expect(composer.value).toBe("");
  });

  it("executes /clean as a native conversation clear effect", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [{ kind: "userPrompt", text: "old conversation" }],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/clean",
          shortDescription: "Nettoyer la conversation courante",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "clean" as const,
        },
        effect: {
          kind: "cleanConversation" as const,
          sessionId: "chat-session-1",
          clearedChunks: 1,
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect(await screen.findByText("old conversation")).toBeTruthy();

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/clean" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/clean", {
        sessionId: "chat-session-1",
      }),
    );
    await waitFor(() => expect(screen.queryByText("old conversation")).toBeNull());
    expect(screen.queryByRole("alert")).toBeNull();
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
    expect(composer.value).toBe("");
  });

  it("executes /help as a native help effect", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/help",
          shortDescription: "Afficher les commandes disponibles",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "help" as const,
        },
        effect: {
          kind: "help" as const,
          commands: [
            {
              name: "/help",
              shortDescription: "Afficher les commandes disponibles",
              requiresConfirmation: false,
              availability: { status: "available" as const },
              source: "native" as const,
              native: "help" as const,
            },
            {
              name: "/clean",
              shortDescription: "Nettoyer la conversation courante",
              requiresConfirmation: false,
              availability: { status: "available" as const },
              source: "native" as const,
              native: "clean" as const,
            },
            {
              name: "/profile",
              shortDescription: "Changer le profil de l'agent",
              requiresConfirmation: true,
              availability: { status: "available" as const },
              source: "native" as const,
              native: "profile" as const,
            },
          ],
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/help" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/help", {
        sessionId: "chat-session-1",
      }),
    );
    expect(
      await screen.findByText(/\/clean - Nettoyer la conversation courante/),
    ).toBeTruthy();
    expect(screen.queryByRole("alert")).toBeNull();
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
    expect(composer.value).toBe("");
  });

  it("shows feedback when a plugin slash-command callback cannot be dispatched", async () => {
    const registry = new PluginRuntimeRegistry();
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/explain",
          shortDescription: "Explain selection",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: { plugin: { pluginId: "dev.acme.missing" } },
          plugin: {
            pluginId: "dev.acme.missing",
            commandId: "dev.acme.missing.run",
          },
        },
        effect: {
          kind: "pluginCallback" as const,
          pluginId: "dev.acme.missing",
          commandId: "dev.acme.missing.run",
          arguments: [],
        },
      })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <PluginRuntimeProvider
          value={{ registry, failures: [], pending: [], loading: false }}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </PluginRuntimeProvider>
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/);
    fireEvent.change(composer, { target: { value: "/explain" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    const alert = await screen.findByRole("alert");
    expect(alert.textContent).toContain("Commande /explain échouée");
    expect(alert.textContent).toContain('plugin "dev.acme.missing" is not loaded');
    expect(screen.getAllByText(/Commande \/explain échouée/)).toHaveLength(2);
    expect(agent.sendAgentChat).not.toHaveBeenCalled();
  });

  it("executes /profile as a confirmed profile-switch flow that resets the current session", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        cellKind: "chat" as const,
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/profile",
          shortDescription: "Changer le profil de l'agent",
          requiresConfirmation: true,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "profile" as const,
        },
        effect: {
          kind: "profileSwitch" as const,
          sessionId: "chat-session-1",
        },
      })),
      changeAgentProfile: vi.fn(async () => ({ agent: { id: "agent-1" } })),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const profileGateway = {
      listProfiles: vi.fn(async () => [
        profile,
        {
          ...profile,
          id: "codex-high",
          name: "Codex High",
        },
      ]),
    };
    const onSessionId = vi.fn();
    const onConversationId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          profile: profileGateway,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={onConversationId}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "/profile" } });
    fireEvent.keyDown(composer, { key: "Enter" });

    const dialog = await screen.findByRole("dialog", { name: "Changer de profil" });
    expect(dialog.textContent).toContain("réinitialiser la session courante");
    expect(dialog.textContent).toContain("L'historique de cette CLI custom sera perdu");
    expect(agent.executeSlashCommand).toHaveBeenCalledWith("/profile", {
      sessionId: "chat-session-1",
    });
    expect(agent.sendAgentChat).not.toHaveBeenCalled();

    const confirmButton = screen.getByRole("button", {
      name: "Reset et changer le profil",
    }) as HTMLButtonElement;
    expect(confirmButton.disabled).toBe(true);

    fireEvent.change(screen.getByLabelText("profil cible"), {
      target: { value: "codex-high" },
    });
    fireEvent.click(screen.getByLabelText("Je confirme que la session courante sera reset."));
    expect(confirmButton.disabled).toBe(false);
    fireEvent.click(confirmButton);

    await waitFor(() =>
      expect(agent.changeAgentProfile).toHaveBeenCalledWith(
        "project-1",
        "agent-1",
        "codex-high",
        24,
        80,
      ),
    );
    await waitFor(() =>
      expect(agent.launchAgentChat).toHaveBeenCalledWith("project-1", "agent-1", {
        cwd: "/repo",
        rows: 24,
        cols: 80,
        conversationId: undefined,
        nodeId: "node-1",
      }),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onConversationId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(onConversationId).toHaveBeenCalledWith("conversation-2");
    expect(screen.getByText("Profil changé vers Codex High.")).toBeTruthy();
    expect(screen.queryByRole("dialog", { name: "Changer de profil" })).toBeNull();
  });

  it("pastes a clipboard image as a removable preview chip", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "clipboard.png", { type: "image/png" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([1, 2, 3]).buffer),
    });
    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.paste(composer, {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "image/png",
            getAsFile: () => file,
          },
        ],
        getData: () => "",
      },
    });

    expect(await screen.findByText("Fichier joint: clipboard.png")).toBeTruthy();
    expect(screen.getByTestId("attachment-preview-clipboard.png")).toBeTruthy();
    await waitFor(() => expect(composer.value).toBe("[Image 1]"));

    fireEvent.click(screen.getByRole("button", { name: "retirer clipboard.png" }));

    await waitFor(() =>
      expect(screen.queryByText("Fichier joint: clipboard.png")).toBeNull(),
    );
    expect(composer.value).toBe("");
    expect(
      (screen.getByRole("button", { name: "Envoyer" }) as HTMLButtonElement)
        .disabled,
    ).toBe(true);
  });

  it("falls back to the async clipboard API when pasted images are absent from DataTransfer", async () => {
    const originalClipboard = Object.getOwnPropertyDescriptor(
      window.navigator,
      "clipboard",
    );
    const read = vi.fn(async () => [
      {
        types: ["image/png"],
        getType: vi.fn(async () => new Blob([new Uint8Array([1, 2, 3])], {
          type: "image/png",
        })),
      },
    ]);
    Object.defineProperty(window.navigator, "clipboard", {
      configurable: true,
      value: { read },
    });
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    try {
      render(
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>,
      );

      await waitFor(() =>
        expect(agent.reattachAgentChat).toHaveBeenCalledWith(
          "chat-session-1",
          expect.any(Function),
        ),
      );

      fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
        clipboardData: {
          items: [],
          files: [],
          getData: () => "",
        },
      });

      await screen.findByText(/Fichier joint: clipboard-image-\d+\.png/);
      expect(read).toHaveBeenCalledTimes(1);
      fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

      await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
      expect(agent.sendAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        "[Image 1]",
        expect.any(Function),
        {
          attachments: [
            {
              filename: expect.stringMatching(/^clipboard-image-\d+\.png$/),
              contentBase64: "AQID",
              mime: "image/png",
              sourceKind: "clipboard",
            },
          ],
        },
      );
    } finally {
      if (originalClipboard) {
        Object.defineProperty(window.navigator, "clipboard", originalClipboard);
      } else {
        Object.defineProperty(window.navigator, "clipboard", {
          configurable: true,
          value: undefined,
        });
      }
    }
  });

  it("shows a non-blocking error when the async clipboard image read fails", async () => {
    const originalClipboard = Object.getOwnPropertyDescriptor(
      window.navigator,
      "clipboard",
    );
    Object.defineProperty(window.navigator, "clipboard", {
      configurable: true,
      value: { read: vi.fn(async () => { throw new Error("clipboard denied"); }) },
    });
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    try {
      render(
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>,
      );

      await waitFor(() =>
        expect(agent.reattachAgentChat).toHaveBeenCalledWith(
          "chat-session-1",
          expect.any(Function),
        ),
      );

      fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
        clipboardData: {
          items: [],
          files: [],
          getData: () => "",
        },
      });

      expect((await screen.findByRole("alert")).textContent).toContain(
        "clipboard denied",
      );
      expect(
        (screen.getByRole("button", { name: "Envoyer" }) as HTMLButtonElement)
          .disabled,
      ).toBe(true);
    } finally {
      if (originalClipboard) {
        Object.defineProperty(window.navigator, "clipboard", originalClipboard);
      } else {
        Object.defineProperty(window.navigator, "clipboard", {
          configurable: true,
          value: undefined,
        });
      }
    }
  });

  it("sends a pasted clipboard image without requiring text", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "paste-image.png", { type: "image/png" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([1, 2, 3]).buffer),
    });
    fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "image/png",
            getAsFile: () => file,
          },
        ],
        getData: () => "",
      },
    });

    await screen.findByText("Fichier joint: paste-image.png");
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "[Image 1]",
      expect.any(Function),
      {
        attachments: [
          {
            filename: "paste-image.png",
            contentBase64: "AQID",
            mime: "image/png",
            sourceKind: "clipboard",
          },
        ],
      },
    );
    expect(screen.getByText("[Image 1]")).toBeTruthy();
    expect(screen.getByText("Fichier: paste-image.png")).toBeTruthy();
  });

  it("accepts pasted generic files exposed only through clipboardData.files", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "files-only.pdf", { type: "application/pdf" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([4, 5, 6]).buffer),
    });
    fireEvent.paste(screen.getByLabelText(/message CLI custom/), {
      clipboardData: {
        items: [],
        files: [file],
        getData: () => "",
      },
    });

    await screen.findByText("Fichier joint: files-only.pdf");
    expect(screen.queryByTestId("attachment-preview-files-only.pdf")).toBeNull();
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "",
      expect.any(Function),
      {
        attachments: [
          {
            filename: "files-only.pdf",
            contentBase64: "BAUG",
            mime: "application/pdf",
            sourceKind: "clipboard",
          },
        ],
      },
    );
  });

  it("keeps pasted text insertion when clipboard files are attached", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "prefix suffix" } });
    composer.setSelectionRange(7, 13);

    const file = new File(["ignored"], "mixed.txt", { type: "text/plain" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([7, 8, 9]).buffer),
    });
    fireEvent.paste(composer, {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "text/plain",
            getAsFile: () => file,
          },
        ],
        getData: () => "inserted",
      },
    });

    await screen.findByText("Fichier joint: mixed.txt");
    await waitFor(() => expect(composer.value).toBe("prefix inserted"));
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "prefix inserted",
      expect.any(Function),
      {
        attachments: [
          {
            filename: "mixed.txt",
            contentBase64: "BwgJ",
            mime: "text/plain",
            sourceKind: "clipboard",
          },
        ],
      },
    );
    expect(screen.getByText("prefix inserted")).toBeTruthy();
    expect(screen.getByText("Fichier: mixed.txt")).toBeTruthy();
  });

  it("inserts pasted image tokens at the cursor and sends the tokenized projection", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "voir  maintenant" } });
    composer.setSelectionRange(5, 5);
    const file = new File(["ignored"], "cursor.png", { type: "image/png" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([1, 2, 3]).buffer),
    });

    fireEvent.paste(composer, {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "image/png",
            getAsFile: () => file,
          },
        ],
        getData: () => "",
      },
    });

    await screen.findByText("Fichier joint: cursor.png");
    await waitFor(() => expect(composer.value).toBe("voir [Image 1] maintenant"));
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.sendAgentChat).toHaveBeenCalledWith(
      "chat-session-1",
      "voir [Image 1] maintenant",
      expect.any(Function),
      {
        attachments: [
          {
            filename: "cursor.png",
            contentBase64: "AQID",
            mime: "image/png",
            sourceKind: "clipboard",
          },
        ],
      },
    );
  });

  it("deduplicates clipboard files by metadata across clipboard sources and repeated paste", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "chat-session-1",
        expect.any(Function),
      ),
    );

    const file = new File(["ignored"], "duplicate.pdf", {
      type: "application/pdf",
      lastModified: 123,
    });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([10, 11, 12]).buffer),
    });
    const clipboardData = {
      items: [
        {
          kind: "file",
          type: "application/pdf",
          getAsFile: () => file,
        },
      ],
      files: [file],
      getData: () => "",
    };
    const composer = screen.getByLabelText(/message CLI custom/);

    fireEvent.paste(composer, { clipboardData });
    await screen.findByText("Fichier joint: duplicate.pdf");
    fireEvent.paste(composer, { clipboardData });

    await waitFor(() =>
      expect(screen.getAllByText("Fichier joint: duplicate.pdf")).toHaveLength(1),
    );
  });

  it("restores and saves drafts scoped by project, layout, and node", async () => {
    const drafts = new Map<string, string>([
      ["project-1::layout-a::node-1", "restored draft"],
    ]);
    const key = (scope: ChatDraftScope) =>
      `${scope.projectId}::${scope.layoutId}::${scope.nodeId}`;
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      readChatDraft: vi.fn(async (scope: ChatDraftScope) => ({
        text: drafts.get(key(scope)) ?? null,
        updatedAtMs: null,
      })),
      saveChatDraft: vi.fn(async (scope: ChatDraftScope, text: string) => {
        if (text) drafts.set(key(scope), text);
        else drafts.delete(key(scope));
      }),
      clearChatDraft: vi.fn(async (scope: ChatDraftScope) => {
        drafts.delete(key(scope));
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const baseProps = {
      agentId: "agent-1",
      agentName: "Worker",
      profile,
      cwd: "/repo",
      nodeId: "node-1",
      sessionId: "chat-session-1",
      conversationId: "conversation-1",
      onSessionId: vi.fn(),
      onConversationId: vi.fn(),
    };

    const { rerender } = render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          {...baseProps}
          projectId="project-1"
          layoutId="layout-a"
        />
      </DIProvider>,
    );

    const composer = await screen.findByDisplayValue("restored draft");
    fireEvent.change(composer, { target: { value: "edited draft" } });

    await waitFor(() =>
      expect(agent.saveChatDraft).toHaveBeenCalledWith(
        { projectId: "project-1", layoutId: "layout-a", nodeId: "node-1" },
        "edited draft",
      ),
    );

    rerender(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          {...baseProps}
          projectId="project-1"
          layoutId="layout-b"
        />
      </DIProvider>,
    );
    await waitFor(() =>
      expect((screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement).value).toBe(""),
    );

    rerender(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          {...baseProps}
          projectId="project-1"
          layoutId="layout-a"
        />
      </DIProvider>,
    );
    await screen.findByDisplayValue("edited draft");

    rerender(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          {...baseProps}
          projectId="project-2"
          layoutId="layout-a"
        />
      </DIProvider>,
    );
    await waitFor(() =>
      expect((screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement).value).toBe(""),
    );
  });

  it("does not persist attachments with the restored draft", async () => {
    const drafts = new Map<string, string>();
    const scope = { projectId: "project-1", layoutId: "layout-a", nodeId: "node-1" };
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      readChatDraft: vi.fn(async () => ({
        text: drafts.get("draft") ?? null,
        updatedAtMs: null,
      })),
      saveChatDraft: vi.fn(async (_scope: ChatDraftScope, text: string) => {
        drafts.set("draft", text);
      }),
      clearChatDraft: vi.fn(async () => {
        drafts.delete("draft");
      }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const renderView = () =>
      render(
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId={scope.projectId}
            layoutId={scope.layoutId}
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId={scope.nodeId}
            sessionId="chat-session-1"
            conversationId="conversation-1"
            onSessionId={vi.fn()}
            onConversationId={vi.fn()}
          />
        </DIProvider>,
      );

    const first = renderView();
    await waitFor(() =>
      expect(agent.readChatDraft).toHaveBeenCalledWith(scope),
    );
    const composer = screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement;
    fireEvent.change(composer, { target: { value: "draft with file" } });

    const file = new File(["ignored"], "not-persisted.png", { type: "image/png" });
    Object.defineProperty(file, "arrayBuffer", {
      value: vi.fn(async () => new Uint8Array([1, 2, 3]).buffer),
    });
    fireEvent.paste(composer, {
      clipboardData: {
        items: [
          {
            kind: "file",
            type: "image/png",
            getAsFile: () => file,
          },
        ],
        getData: () => "",
      },
    });
    await screen.findByText("Fichier joint: not-persisted.png");
    await waitFor(() =>
      expect(agent.saveChatDraft).toHaveBeenCalledWith(scope, "draft with file[Image 1]"),
    );

    first.unmount();
    renderView();

    await screen.findByDisplayValue("draft with file[Image 1]");
    expect(screen.queryByText("Fichier joint: not-persisted.png")).toBeNull();
  });

  it("clears the persisted draft when sending the composer", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      readChatDraft: vi.fn(async () => ({ text: "to send", updatedAtMs: null })),
      saveChatDraft: vi.fn(async () => {}),
      clearChatDraft: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const scope = { projectId: "project-1", layoutId: "layout-a", nodeId: "node-1" };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId={scope.projectId}
          layoutId={scope.layoutId}
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId={scope.nodeId}
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await screen.findByDisplayValue("to send");
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.clearChatDraft).toHaveBeenCalledWith(scope);
    expect((screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement).value).toBe("");
  });

  it("clears the persisted draft when a slash command is consumed", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(async () => {}),
      executeSlashCommand: vi.fn(async () => ({
        command: {
          name: "/help",
          shortDescription: "Afficher les commandes disponibles",
          requiresConfirmation: false,
          availability: { status: "available" as const },
          source: "native" as const,
          native: "help" as const,
        },
        effect: {
          kind: "help" as const,
          commands: [],
        },
      })),
      readChatDraft: vi.fn(async () => ({ text: "/help", updatedAtMs: null })),
      saveChatDraft: vi.fn(async () => {}),
      clearChatDraft: vi.fn(async () => {}),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const scope = { projectId: "project-1", layoutId: "layout-a", nodeId: "node-1" };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId={scope.projectId}
          layoutId={scope.layoutId}
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId={scope.nodeId}
          sessionId="chat-session-1"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await screen.findByDisplayValue("/help");
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() =>
      expect(agent.executeSlashCommand).toHaveBeenCalledWith("/help", {
        sessionId: "chat-session-1",
      }),
    );
    expect(agent.clearChatDraft).toHaveBeenCalledWith(scope);
    expect((screen.getByLabelText(/message CLI custom/) as HTMLTextAreaElement).value).toBe("");
  });

  it("keeps the chat shell bounded with a scrollable message area and fixed composer", async () => {
    const agent = {
      launchAgentChat: vi.fn(() => new Promise<never>(() => {})),
      reattachAgentChat: vi.fn(),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker with a very long name that must not collide with controls"
          profile={{
            ...profile,
            name: "Structured profile with a very long display name",
          }}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const shell = screen.getByTestId("custom-agent-chat-view");
    const toolbar = await screen.findByRole("toolbar", {
      name: "custom agent chat actions",
    });
    const scroll = screen.getByTestId("custom-agent-chat-scroll");
    const composer = screen.getByTestId("custom-agent-chat-composer");

    expect(shell.className).toContain("h-full");
    expect(shell.className).toContain("min-h-0");
    expect(shell.className).toContain("overflow-hidden");
    expect(toolbar.className).toContain("overflow-hidden");
    expect(screen.queryByRole("button", { name: "Cancel" })).toBeNull();
    expect(scroll.className).toContain("flex-1");
    expect(scroll.className).toContain("basis-0");
    expect(scroll.className).toContain("overflow-y-auto");
    expect(composer.className).toContain("shrink-0");
  });

  it("falls back when Tauri surfaces structured session NOT_FOUND as a raw string", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce(
          "not found: structured session 69b57638-0ac7-4a79-8252-e0436a3265f6",
        )
        .mockRejectedValueOnce(
          "not found: structured session 69b57638-0ac7-4a79-8252-e0436a3265f6",
        )
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback: [],
        })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="69b57638-0ac7-4a79-8252-e0436a3265f6"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(1));
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      1,
      "69b57638-0ac7-4a79-8252-e0436a3265f6",
      expect.any(Function),
    );
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      2,
      "69b57638-0ac7-4a79-8252-e0436a3265f6",
      expect.any(Function),
      { projectId: "project-1", agentId: "agent-1" },
    );
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      3,
      "chat-session-2",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("does not reopen when the parent echoes a launched session id", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-echo",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    function EchoingParent() {
      const [echoedSessionId, setEchoedSessionId] = useState<string | null>(null);
      return (
        <DIProvider
          gateways={{
            agent,
            system: { pickFile: vi.fn(async () => null) },
          } as unknown as Gateways}
        >
          <CustomAgentChatView
            projectId="project-1"
            agentId="agent-1"
            agentName="Worker"
            profile={profile}
            cwd="/repo"
            nodeId="node-1"
            sessionId={echoedSessionId}
            conversationId="conversation-1"
            onSessionId={(nextSessionId) => {
              onSessionId(nextSessionId);
              setEchoedSessionId(nextSessionId);
            }}
            onConversationId={vi.fn()}
          />
        </DIProvider>
      );
    }

    render(<EchoingParent />);

    await waitFor(() =>
      expect(onSessionId).toHaveBeenCalledWith("chat-session-echo"),
    );
    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(1));
    await waitFor(() => expect(agent.reattachAgentChat).toHaveBeenCalledTimes(1));
    await new Promise((resolve) => setTimeout(resolve, 20));

    expect(agent.launchAgentChat).toHaveBeenCalledTimes(1);
    expect(agent.reattachAgentChat).toHaveBeenCalledTimes(1);
  });

  it("recovers and retries the prompt when send reports NOT_FOUND", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi
        .fn()
        .mockRejectedValueOnce({
          code: "NOT_FOUND",
          message: "not found: structured session stale-session",
        })
        .mockImplementationOnce(async (_sessionId: string, _prompt: string, onChunk) => {
          onChunk({ kind: "final", content: "Recovered reply" });
        }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "stale-session",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "please recover" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      1,
      "stale-session",
      "please recover",
      expect.any(Function),
    );
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      2,
      "chat-session-2",
      "please recover",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(await screen.findByText("Recovered reply")).toBeTruthy();
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("recovers and retries the prompt when send reports structured session NOT_FOUND as a raw string", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "chat-session-2",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi
        .fn()
        .mockRejectedValueOnce("not found: structured session stale-session")
        .mockImplementationOnce(async (_sessionId: string, _prompt: string, onChunk) => {
          onChunk({ kind: "final", content: "Recovered reply" });
        }),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="stale-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "stale-session",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "please recover" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));

    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.sendAgentChat).toHaveBeenNthCalledWith(
      2,
      "chat-session-2",
      "please recover",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("chat-session-2");
    expect(await screen.findByText("Recovered reply")).toBeTruthy();
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("treats NOT_FOUND during request cancel as an already-stopped request", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn(async (sessionId: string) => ({
        sessionId,
        scrollback: [],
      })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      stopLiveAgent: vi.fn(),
      cancelAgentChat: vi.fn().mockRejectedValueOnce({
        code: "NOT_FOUND",
        message: "agent agent-1 has no live session",
      }),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="gone-session"
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() =>
      expect(agent.reattachAgentChat).toHaveBeenCalledWith(
        "gone-session",
        expect.any(Function),
      ),
    );

    fireEvent.change(screen.getByLabelText(/message CLI custom/), {
      target: { value: "long turn" },
    });
    fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
    await waitFor(() => expect(agent.sendAgentChat).toHaveBeenCalled());

    fireEvent.click(await screen.findByRole("button", { name: "Stop" }));

    expect(await screen.findByText("Request already stopped.")).toBeTruthy();
    expect(onSessionId).not.toHaveBeenCalledWith(null);
    expect(agent.cancelAgentChat).toHaveBeenCalledWith("gone-session");
    expect(agent.stopLiveAgent).not.toHaveBeenCalled();
    expect(agent.closeAgentChat).not.toHaveBeenCalled();
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("does not swallow post-launch reattach errors", async () => {
    const agent = {
      launchAgentChat: vi.fn(async () => ({
        sessionId: "new-session",
        cellKind: "chat",
        assignedConversationId: "conversation-2",
      })),
      reattachAgentChat: vi.fn().mockRejectedValueOnce({
        code: "PROCESS",
        message: "post-launch attach failed",
      }),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect((await screen.findByRole("alert")).textContent).toContain(
      "post-launch attach failed",
    );
  });

  it("does not publish a session id when custom launch is refused as PTY-routed", async () => {
    const agent = {
      launchAgentChat: vi.fn().mockRejectedValueOnce({
        code: "STRUCTURED_ROUTED_TO_PTY",
        message:
          "custom CLI launch for agent agent-1 in project project-1 returned cellKind=pty; expected chat. sessionId=pty-session-1; nodeId=node-1",
      }),
      reattachAgentChat: vi.fn(),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    const alert = await screen.findByRole("alert");
    expect(alert.textContent).toContain("cellKind=pty");
    expect(agent.launchAgentChat).toHaveBeenCalledTimes(1);
    expect(agent.reattachAgentChat).not.toHaveBeenCalled();
    expect(onSessionId).not.toHaveBeenCalled();
  });

  it("recovers when post-launch reattach reports NOT_FOUND", async () => {
    const agent = {
      launchAgentChat: vi
        .fn()
        .mockResolvedValueOnce({
          sessionId: "new-session-1",
          assignedConversationId: "conversation-2",
        })
        .mockResolvedValueOnce({
          sessionId: "new-session-2",
          assignedConversationId: "conversation-2",
        }),
      reattachAgentChat: vi
        .fn()
        .mockRejectedValueOnce({
          code: "NOT_FOUND",
          message: "not found: structured session new-session-1",
        })
        .mockImplementationOnce(async (sessionId: string) => ({
          sessionId,
          scrollback: [],
        })),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };
    const onSessionId = vi.fn();

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId={null}
          conversationId="conversation-1"
          onSessionId={onSessionId}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    await waitFor(() => expect(agent.launchAgentChat).toHaveBeenCalledTimes(2));
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      1,
      "new-session-1",
      expect.any(Function),
    );
    expect(agent.reattachAgentChat).toHaveBeenNthCalledWith(
      2,
      "new-session-2",
      expect.any(Function),
    );
    expect(onSessionId).toHaveBeenCalledWith(null);
    expect(onSessionId).toHaveBeenCalledWith("new-session-2");
    expect(screen.queryByText(/not found: structured session/)).toBeNull();
  });

  it("surfaces non-NOT_FOUND reattach errors instead of launching a new session", async () => {
    const agent = {
      launchAgentChat: vi.fn(),
      reattachAgentChat: vi.fn().mockRejectedValueOnce({
        code: "PROCESS",
        message: "structured session failed to attach",
      }),
      sendAgentChat: vi.fn(() => new Promise<void>(() => {})),
      cancelAgentChat: vi.fn(async () => {}),
      closeAgentChat: vi.fn(async () => {}),
    };

    render(
      <DIProvider
        gateways={{
          agent,
          system: { pickFile: vi.fn(async () => null) },
        } as unknown as Gateways}
      >
        <CustomAgentChatView
          projectId="project-1"
          agentId="agent-1"
          agentName="Worker"
          profile={profile}
          cwd="/repo"
          nodeId="node-1"
          sessionId="existing-session"
          conversationId="conversation-1"
          onSessionId={vi.fn()}
          onConversationId={vi.fn()}
        />
      </DIProvider>,
    );

    expect((await screen.findByRole("alert")).textContent).toContain(
      "structured session failed to attach",
    );
    expect(agent.launchAgentChat).not.toHaveBeenCalled();
  });
});