fix: load shared container runtime in Vite renderer

2026-11-01 03:12:33 +00:00 · 2026-10-21 11:03:51 +08:00
58 changed files with 292 additions and 3684 deletions
@@ -9,12 +9,6 @@
  <a href="https://netcatty.app"><strong>netcatty.app</strong></a>
 </p>

-<p align="center">
-  <a href="https://trendshift.io/repositories/18391?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-18391" target="_blank" rel="noopener noreferrer">
-    <img src="https://trendshift.io/api/badge/trendshift/repositories/18391/daily?language=TypeScript" alt="binaricat/Netcatty | Trendshift" width="250" height="55"/>
-  </a>
-</p>
-
 <p align="center">
  Electron、React、xterm.js で構築された機能豊富な SSH ワークスペース。<br/>
  🔥 内蔵 AI Agent · 分割ターミナル · Vault ビュー · SFTP ワークフロー · カスタムテーマ — すべてが一つに。
@@ -46,7 +40,7 @@

 ---

-<img width="3358" height="1984" alt="image" src="docs/assets/readme/overview.webp" />
+<img width="3358" height="1984" alt="image" src="https://github.com/user-attachments/assets/e1302660-dece-46be-9857-1678a9b13d00" />

 ---

@@ -69,13 +63,13 @@

 Catty Agent にサーバーの健全性チェックを依頼すると、適切なコマンドを実行し、出力を分析して数秒で明確なサマリーを提示します。

-<img width="3302" height="1978" alt="image" src="docs/assets/readme/catty-single-host.webp" />
+<img width="3302" height="1978" alt="image" src="https://github.com/user-attachments/assets/3ec30145-d226-4e26-834b-52ee75b5e205" />

 #### 🚀 マルチホスト — Docker Swarm クラスターのセットアップ

 1 つの会話で 2 台のサーバーをまたいで Docker Swarm クラスターをオーケストレーションする Catty Agent をご覧ください。初期化、トークン交換、ノード参加まですべてこなします — あなたは望む結果を伝えるだけ。

-<img width="3294" height="1974" alt="image" src="docs/assets/readme/catty-multi-host.webp" />
+<img width="3294" height="1974" alt="image" src="https://github.com/user-attachments/assets/ca17e857-6163-4067-a615-cacdfd5be4fc" />

 ---

@@ -156,34 +150,34 @@ Catty Agent にサーバーの健全性チェックを依頼すると、適切

 メインウィンドウは、長時間の SSH 作業を前提に設計されています。セッション、ナビゲーション、主要ツールへ素早くアクセスできます。

-<img width="3290" height="1988" alt="image" src="docs/assets/readme/main-window.webp" />
+<img width="3290" height="1988" alt="image" src="https://github.com/user-attachments/assets/ab3afd3e-a819-46fc-9251-40acb592ba69" />

-<img width="3324" height="1992" alt="image" src="docs/assets/readme/main-window-terminal.webp" />
+<img width="3324" height="1992" alt="image" src="https://github.com/user-attachments/assets/7c7f6e7f-fb20-4574-8e7f-74397682b873" />

 <a name="vault-ビュー"></a>
 ## Vault ビュー

 作業に合わせて見え方を切り替え：グリッドで全体像、リストでスキャン、ツリーで整理と階層ナビゲーション。

-<img width="3292" height="1984" alt="image" src="docs/assets/readme/vault-grid.webp" />
+<img width="3292" height="1984" alt="image" src="https://github.com/user-attachments/assets/29642143-3fd6-4693-a30c-b7f656053ca3" />

-<img width="3322" height="1998" alt="image" src="docs/assets/readme/vault-list.webp" />
+<img width="3322" height="1998" alt="image" src="https://github.com/user-attachments/assets/6041efe2-607e-4314-838c-eba3db4c852c" />

 <a name="モニタリングビュー"></a>
 ## モニタリングビュー

 CPU、メモリ、ディスク、ネットワーク、レイテンシーを確認でき、対応する環境では GPU の詳細も表示されます。表示する列の選択、列幅や更新設定の調整ができ、監視対象のホストから直接ターミナルを開くこともできます。

-<img width="3364" height="1982" alt="image" src="docs/assets/readme/monitoring.webp" />
+<img width="3364" height="1982" alt="image" src="https://github.com/user-attachments/assets/d0f495b5-25c8-494f-bb9c-8c20b0a921b6" />

-<img width="3362" height="1980" alt="image" src="docs/assets/readme/monitoring-columns.webp" />
+<img width="3362" height="1980" alt="image" src="https://github.com/user-attachments/assets/245c234e-2b22-43f2-a4fd-8057d229c56f" />

 <a name="分割ターミナル"></a>
 ## 分割ターミナル

 分割ペインで複数のサーバー/タスクを同時に扱えます（例：デプロイ + ログ + 監視）。

-<img width="1560" height="871" alt="split" src="docs/assets/readme/split-terminals.webp" />
+<img width="1560" height="871" alt="split" src="https://github.com/user-attachments/assets/c93a8523-6256-4bb3-8b6e-d599831f2f9f" />

 ---

@@ -46,7 +46,7 @@

 ---

-<img width="3358" height="1984" alt="image" src="docs/assets/readme/overview.webp" />
+<img width="3358" height="1984" alt="image" src="https://github.com/user-attachments/assets/e1302660-dece-46be-9857-1678a9b13d00" />


 ---
@@ -69,14 +69,14 @@

 Ask Catty Agent to check a server's health, and it runs the right commands, analyzes the output, and gives you a clear summary — all in seconds.

-<img width="3302" height="1978" alt="image" src="docs/assets/readme/catty-single-host.webp" />
+<img width="3302" height="1978" alt="image" src="https://github.com/user-attachments/assets/3ec30145-d226-4e26-834b-52ee75b5e205" />


 #### 🚀 Multi-Host — Docker Swarm Cluster Setup

 Watch Catty Agent orchestrate a Docker Swarm cluster across two servers in one conversation. It handles the init, token exchange, and node joining — you just tell it what you want.

-<img width="3294" height="1974" alt="image" src="docs/assets/readme/catty-multi-host.webp" />
+<img width="3294" height="1974" alt="image" src="https://github.com/user-attachments/assets/ca17e857-6163-4067-a615-cacdfd5be4fc" />


 ---
@@ -159,10 +159,10 @@ If you regularly work with a fleet of servers, Netcatty is built for speed and f

 The main window is designed for long-running SSH workflows: quick access to sessions, navigation, and core tools in one place.

-<img width="3290" height="1988" alt="image" src="docs/assets/readme/main-window.webp" />
+<img width="3290" height="1988" alt="image" src="https://github.com/user-attachments/assets/ab3afd3e-a819-46fc-9251-40acb592ba69" />


-<img width="3324" height="1992" alt="image" src="docs/assets/readme/main-window-terminal.webp" />
+<img width="3324" height="1992" alt="image" src="https://github.com/user-attachments/assets/7c7f6e7f-fb20-4574-8e7f-74397682b873" />



@@ -171,10 +171,10 @@ The main window is designed for long-running SSH workflows: quick access to sess

 Organize and navigate your hosts using the view that best fits the moment: grid for overview, list for scanning, tree for structure.

-<img width="3292" height="1984" alt="image" src="docs/assets/readme/vault-grid.webp" />
+<img width="3292" height="1984" alt="image" src="https://github.com/user-attachments/assets/29642143-3fd6-4693-a30c-b7f656053ca3" />


-<img width="3322" height="1998" alt="image" src="docs/assets/readme/vault-list.webp" />
+<img width="3322" height="1998" alt="image" src="https://github.com/user-attachments/assets/6041efe2-607e-4314-838c-eba3db4c852c" />



@@ -183,9 +183,9 @@ Organize and navigate your hosts using the view that best fits the moment: grid

 Inspect CPU, memory, disk, network, and latency readings, with GPU details where available. Choose visible columns, resize them, adjust refresh controls, and open a terminal directly from a monitored host.

-<img width="3364" height="1982" alt="image" src="docs/assets/readme/monitoring.webp" />
+<img width="3364" height="1982" alt="image" src="https://github.com/user-attachments/assets/d0f495b5-25c8-494f-bb9c-8c20b0a921b6" />

-<img width="3362" height="1980" alt="image" src="docs/assets/readme/monitoring-columns.webp" />
+<img width="3362" height="1980" alt="image" src="https://github.com/user-attachments/assets/245c234e-2b22-43f2-a4fd-8057d229c56f" />



@@ -195,7 +195,7 @@ Inspect CPU, memory, disk, network, and latency readings, with GPU details where

 Split panes help you monitor multiple servers/services at the same time (deploy + logs + metrics) without juggling windows.

-<img width="1560" height="871" alt="split" src="docs/assets/readme/split-terminals.webp" />
+<img width="1560" height="871" alt="split" src="https://github.com/user-attachments/assets/c93a8523-6256-4bb3-8b6e-d599831f2f9f" />

 ---

@@ -9,12 +9,6 @@
  <a href="https://netcatty.app"><strong>netcatty.app</strong></a>
 </p>

-<p align="center">
-  <a href="https://trendshift.io/repositories/18391?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-18391" target="_blank" rel="noopener noreferrer">
-    <img src="https://trendshift.io/api/badge/trendshift/repositories/18391/daily?language=TypeScript" alt="binaricat/Netcatty | Trendshift" width="250" height="55"/>
-  </a>
-</p>
-
 <p align="center">
  一个基于 Electron、React 和 xterm.js 构建的功能丰富的 SSH 工作空间。<br/>
  🔥 内置 AI Agent · 分屏终端 · Vault 多视图 · SFTP 工作流 · 自定义主题 —— 一应俱全。
@@ -46,7 +40,7 @@

 ---

-<img width="3358" height="1984" alt="image" src="docs/assets/readme/overview.webp" />
+<img width="3358" height="1984" alt="image" src="https://github.com/user-attachments/assets/e1302660-dece-46be-9857-1678a9b13d00" />

 ---

@@ -69,13 +63,13 @@

 让 Catty Agent 检查服务器健康状态，它会自动运行合适的命令、分析输出并给出清晰总结 —— 几秒内完成。

-<img width="3302" height="1978" alt="image" src="docs/assets/readme/catty-single-host.webp" />
+<img width="3302" height="1978" alt="image" src="https://github.com/user-attachments/assets/3ec30145-d226-4e26-834b-52ee75b5e205" />

 #### 🚀 多主机 —— Docker Swarm 集群搭建

 看 Catty Agent 在一次对话中跨两台服务器编排 Docker Swarm 集群。它负责初始化、令牌交换和节点加入 —— 你只需说出想要的结果。

-<img width="3294" height="1974" alt="image" src="docs/assets/readme/catty-multi-host.webp" />
+<img width="3294" height="1974" alt="image" src="https://github.com/user-attachments/assets/ca17e857-6163-4067-a615-cacdfd5be4fc" />

 ---

@@ -156,34 +150,34 @@

 主界面围绕长期 SSH 工作流设计：把会话、导航和常用工具集中到同一处，减少切换成本。

-<img width="3290" height="1988" alt="image" src="docs/assets/readme/main-window.webp" />
+<img width="3290" height="1988" alt="image" src="https://github.com/user-attachments/assets/ab3afd3e-a819-46fc-9251-40acb592ba69" />

-<img width="3324" height="1992" alt="image" src="docs/assets/readme/main-window-terminal.webp" />
+<img width="3324" height="1992" alt="image" src="https://github.com/user-attachments/assets/7c7f6e7f-fb20-4574-8e7f-74397682b873" />

 <a name="vault-视图"></a>
 ## Vault 视图

 用更适合当前任务的方式管理与浏览主机：网格看全局，列表做筛选，树形做整理与层级导航。

-<img width="3292" height="1984" alt="image" src="docs/assets/readme/vault-grid.webp" />
+<img width="3292" height="1984" alt="image" src="https://github.com/user-attachments/assets/29642143-3fd6-4693-a30c-b7f656053ca3" />

-<img width="3322" height="1998" alt="image" src="docs/assets/readme/vault-list.webp" />
+<img width="3322" height="1998" alt="image" src="https://github.com/user-attachments/assets/6041efe2-607e-4314-838c-eba3db4c852c" />

 <a name="监控视图"></a>
 ## 监控视图

 查看 CPU、内存、磁盘、网络和延迟数据；支持的环境还可显示 GPU 详情。你可以选择显示的列、调整列宽和刷新设置，并直接从受监控的主机打开终端。

-<img width="3364" height="1982" alt="image" src="docs/assets/readme/monitoring.webp" />
+<img width="3364" height="1982" alt="image" src="https://github.com/user-attachments/assets/d0f495b5-25c8-494f-bb9c-8c20b0a921b6" />

-<img width="3362" height="1980" alt="image" src="docs/assets/readme/monitoring-columns.webp" />
+<img width="3362" height="1980" alt="image" src="https://github.com/user-attachments/assets/245c234e-2b22-43f2-a4fd-8057d229c56f" />

 <a name="分屏终端"></a>
 ## 分屏终端

 分屏适合同时处理多个任务（例如部署 + 日志 + 排障），不用频繁切换窗口。

-<img width="1560" height="871" alt="split" src="docs/assets/readme/split-terminals.webp" />
+<img width="1560" height="871" alt="split" src="https://github.com/user-attachments/assets/c93a8523-6256-4bb3-8b6e-d599831f2f9f" />

 ---

@@ -9,12 +9,6 @@
  <a href="https://netcatty.app"><strong>netcatty.app</strong></a>
 </p>

-<p align="center">
-  <a href="https://trendshift.io/repositories/18391?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-18391" target="_blank" rel="noopener noreferrer">
-    <img src="https://trendshift.io/api/badge/trendshift/repositories/18391/daily?language=TypeScript" alt="binaricat/Netcatty | Trendshift" width="250" height="55"/>
-  </a>
-</p>
-
 <p align="center">
  以 Electron、React 與 xterm.js 打造，介面精緻、功能完整的 SSH 工作區。<br/>
  🔥 內建 AI Agent · 分割終端 · Vault 檢視 · SFTP 工作流 · 自訂主題 —— 全部整合在一起。
@@ -46,7 +40,7 @@

 ---

-<img width="3358" height="1984" alt="image" src="docs/assets/readme/overview.webp" />
+<img width="3358" height="1984" alt="image" src="https://github.com/user-attachments/assets/e1302660-dece-46be-9857-1678a9b13d00" />

 ---

@@ -69,13 +63,13 @@

 請 Catty Agent 檢查伺服器健康狀況，它會自動執行合適的指令、分析輸出，並在幾秒內給你一份清楚的總結。

-<img width="3302" height="1978" alt="image" src="docs/assets/readme/catty-single-host.webp" />
+<img width="3302" height="1978" alt="image" src="https://github.com/user-attachments/assets/3ec30145-d226-4e26-834b-52ee75b5e205" />

 #### 🚀 多主機 —— 建立 Docker Swarm 叢集

 看 Catty Agent 在一次對話裡，跨兩台伺服器編排出一個 Docker Swarm 叢集。初始化、權杖交換、節點加入都由它處理 —— 你只要說出你想要的結果。

-<img width="3294" height="1974" alt="image" src="docs/assets/readme/catty-multi-host.webp" />
+<img width="3294" height="1974" alt="image" src="https://github.com/user-attachments/assets/ca17e857-6163-4067-a615-cacdfd5be4fc" />

 ---

@@ -156,34 +150,34 @@

 主視窗是為了長時間的 SSH 工作流程而設計：工作階段、導覽與常用工具都集中在同一個地方。

-<img width="3290" height="1988" alt="image" src="docs/assets/readme/main-window.webp" />
+<img width="3290" height="1988" alt="image" src="https://github.com/user-attachments/assets/ab3afd3e-a819-46fc-9251-40acb592ba69" />

-<img width="3324" height="1992" alt="image" src="docs/assets/readme/main-window-terminal.webp" />
+<img width="3324" height="1992" alt="image" src="https://github.com/user-attachments/assets/7c7f6e7f-fb20-4574-8e7f-74397682b873" />

 <a name="vault-檢視"></a>
 ## Vault 檢視

 用最適合當下情境的方式整理與瀏覽主機：網格看全局、清單快速掃視、樹狀理層級。

-<img width="3292" height="1984" alt="image" src="docs/assets/readme/vault-grid.webp" />
+<img width="3292" height="1984" alt="image" src="https://github.com/user-attachments/assets/29642143-3fd6-4693-a30c-b7f656053ca3" />

-<img width="3322" height="1998" alt="image" src="docs/assets/readme/vault-list.webp" />
+<img width="3322" height="1998" alt="image" src="https://github.com/user-attachments/assets/6041efe2-607e-4314-838c-eba3db4c852c" />

 <a name="監控檢視"></a>
 ## 監控檢視

 查看 CPU、記憶體、磁碟、網路與延遲資料；支援的環境還可顯示 GPU 詳情。你可以選擇顯示的欄位、調整欄寬與重新整理設定，並直接從受監控的主機開啟終端機。

-<img width="3364" height="1982" alt="image" src="docs/assets/readme/monitoring.webp" />
+<img width="3364" height="1982" alt="image" src="https://github.com/user-attachments/assets/d0f495b5-25c8-494f-bb9c-8c20b0a921b6" />

-<img width="3362" height="1980" alt="image" src="docs/assets/readme/monitoring-columns.webp" />
+<img width="3362" height="1980" alt="image" src="https://github.com/user-attachments/assets/245c234e-2b22-43f2-a4fd-8057d229c56f" />

 <a name="分割終端"></a>
 ## 分割終端

 分割窗格讓你同時盯著多台伺服器或多個服務（部署 + 日誌 + 監控指標），不用一直切視窗。

-<img width="1560" height="871" alt="split" src="docs/assets/readme/split-terminals.webp" />
+<img width="1560" height="871" alt="split" src="https://github.com/user-attachments/assets/c93a8523-6256-4bb3-8b6e-d599831f2f9f" />

 ---

@@ -1,87 +0,0 @@
-import assert from "node:assert/strict";
-import test from "node:test";
-import React from "react";
-import { act, create, type ReactTestRenderer } from "react-test-renderer";
-import { useAppStartupEffects } from "./useAppStartupEffects.ts";
-import { sftpTransferCenterStore } from "../state/sftpTransferCenterStore.ts";
-import { netcattyBridge } from "../../infrastructure/services/netcattyBridge.ts";
-
-for (const accept of [false, true]) {
-  test(`app Quit with an unfinished transfer: ${accept ? "confirm quits" : "declining reports \"transfers\" before resuming only transferring and queued tasks"}`, async (t) => {
-    const previous = Object.getOwnPropertyDescriptor(globalThis, "IS_REACT_ACT_ENVIRONMENT");
-    Object.defineProperty(globalThis, "IS_REACT_ACT_ENVIRONMENT", { configurable: true, value: true });
-    const g = globalThis as unknown as { window?: { confirm?: (m: string) => boolean } };
-    const hadWindow = "window" in g; const previousConfirm = g.window?.confirm;
-    if (!g.window) g.window = {};
-    g.window.confirm = () => accept;
-    let renderer: ReactTestRenderer | undefined;
-    let releaseResume!: () => void;
-    const resumeGate = new Promise<void>((resolve) => { releaseResume = resolve; });
-    t.after(async () => {
-      releaseResume();
-      await act(async () => renderer?.unmount());
-      if (hadWindow && g.window) g.window.confirm = previousConfirm; else delete g.window;
-      if (previous) Object.defineProperty(globalThis, "IS_REACT_ACT_ENVIRONMENT", previous);
-      else Reflect.deleteProperty(globalThis, "IS_REACT_ACT_ENVIRONMENT");
-    });
-    const calls: string[] = [];
-    const reports: Array<[boolean, string | undefined]> = [];
-    let resumeSettled = false;
-    let query!: () => Promise<void>;
-    t.mock.method(sftpTransferCenterStore, "getSnapshot", () => ({
-      tasks: [
-        { id: "running", status: "transferring" },
-        { id: "queued", status: "queued" },
-        { id: "already-paused", status: "paused" },
-        { id: "pausing", status: "pausing" },
-        { id: "interrupted", status: "interrupted" },
-        { id: "child", parentTaskId: "running", status: "transferring" },
-      ],
-    }) as unknown as ReturnType<typeof sftpTransferCenterStore.getSnapshot>);
-    t.mock.method(sftpTransferCenterStore, "pause", async (id: string) => { calls.push(`pause:${id}`); });
-    t.mock.method(sftpTransferCenterStore, "resume", async (id: string) => {
-      calls.push(`resume:${id}`);
-      await resumeGate;
-      resumeSettled = true;
-    });
-    t.mock.method(netcattyBridge, "get", () => ({
-      onCheckDirtyEditors: (callback: typeof query) => { query = callback; return () => {}; },
-      reportDirtyEditorsResult: (dirty: boolean, reason?: string) => {
-        calls.push("report");
-        reports.push([dirty, reason]);
-      },
-    }));
-    function Probe() {
-      useAppStartupEffects({ enabled: false, updateState: {}, sessions: [], hosts: [], keys: [], identities: [], knownHosts: [], proxyProfiles: [], groupConfigs: [], workspaces: [], portForwardingRules: [], t: (key: string) => key });
-      return null;
-    }
-    await act(async () => { renderer = create(React.createElement(Probe)); });
-    const paused = [
-      "pause:running",
-      "pause:queued",
-      "pause:already-paused",
-      "pause:pausing",
-      "pause:interrupted",
-    ];
-    let timer: ReturnType<typeof setTimeout> | undefined;
-    try {
-      await Promise.race([
-        query(),
-        new Promise((_, reject) => {
-          timer = setTimeout(() => reject(new Error("dirty check waited on resume")), 1000);
-        }),
-      ]);
-    } finally {
-      clearTimeout(timer);
-    }
-    assert.equal(resumeSettled, false, "the dirty-check reply must not wait for resume");
-    if (accept) {
-      assert.deepEqual(reports, [[false, undefined]]);
-      assert.deepEqual(calls, [...paused, "report"], "accepted quit leaves every prompted task paused");
-    } else {
-      assert.deepEqual(reports, [[true, "transfers"]], "main must be told the prompt was already answered");
-      assert.deepEqual(calls, [...paused, "report", "resume:running", "resume:queued"],
-        "report precedes resume, and only transferring/queued rows the prompt paused are resumed");
-    }
-  });
-}
@@ -356,51 +356,30 @@ export function useAppStartupEffects(ctx: StartupEffectsContext) {
      // on a slow quit and then quitting anyway after the timeout is
      // exactly the same outcome.
      let hasDirty = false;
-      let reason: "editors" | "transfers" | undefined;
-      // Captured before pause. Only transferring/queued rows were active
-      // because of this prompt.
-      let tasksToResume: { id: string }[] = [];
      try {
        // Pending handoffs retain source contents; accepted handoffs clear them.
        hasDirty = editorTabStore.getTabs().some((tab) => tab.content !== tab.baselineContent);
-        if (hasDirty) {
-          reason = "editors";
-          toast.warning(t('sftp.editor.quitBlockedByDirty'), 'SFTP');
-        }
+        if (hasDirty) toast.warning(t('sftp.editor.quitBlockedByDirty'), 'SFTP');
        if (!hasDirty) {
          const unfinishedTasks = sftpTransferCenterStore.getSnapshot().tasks.filter((task) => (
            !task.parentTaskId && !["completed", "failed", "cancelled"].includes(task.status)
          ));
          if (unfinishedTasks.length > 0) {
-            const resumable = unfinishedTasks.filter((task) => (
-              task.status === "transferring" || task.status === "queued"
-            ));
            await Promise.allSettled(unfinishedTasks.map((task) => sftpTransferCenterStore.pause(task.id)));
            hasDirty = !window.confirm(t('sftp.transferCenter.quitConfirm', { count: unfinishedTasks.length }));
-            if (hasDirty) {
-              // The user chose to stay. Main must hear that before any resume:
-              // resume can outlive the 5s dirty-check timeout, and a late reply
-              // lets the app quit anyway. The synchronous dialog is also skipped
-              // because this prompt was already answered.
-              reason = "transfers";
-              tasksToResume = resumable;
-            }
          }
        }
      } catch (err) {
        console.error('[App] dirty-editors check failed:', err);
      }
      try {
-        bridge.reportDirtyEditorsResult?.(hasDirty, reason);
+        bridge.reportDirtyEditorsResult?.(hasDirty);
      } catch (err) {
        // Reporting itself shouldn't throw, but if the IPC bridge is in a
        // bad state we'd rather log than bubble out of the listener and
        // disable the quit guard for the rest of the session.
        console.error('[App] reportDirtyEditorsResult failed:', err);
      }
-      if (tasksToResume.length > 0) {
-        void Promise.allSettled(tasksToResume.map((task) => sftpTransferCenterStore.resume(task.id)));
-      }
    });
    return unsub;
  }, [enabled, t]);
@@ -1,26 +0,0 @@
-import assert from "node:assert/strict";
-import test from "node:test";
-import type { TransferTask } from "../../../domain/models";
-import { canRetryFromCheckpoint } from "./retryFromCheckpoint";
-
-const failed = (over: Partial<TransferTask> = {}): TransferTask => ({
-  id: "t", fileName: "big.bin", sourcePath: "/l/big.bin", targetPath: "/r/big.bin",
-  sourceConnectionId: "local", targetConnectionId: "remote", direction: "upload",
-  status: "failed", totalBytes: 100, transferredBytes: 40, checkpointBytes: 40,
-  speed: 0, startTime: 1, isDirectory: false, error: "SFTP channel closed", ...over,
-});
-
-test("canRetryFromCheckpoint only for a top-level file that lost its connection with progress", () => {
-  assert.equal(canRetryFromCheckpoint(failed()), true);
-  assert.equal(canRetryFromCheckpoint(failed({ error: "read ECONNRESET" })), true);
-  assert.equal(canRetryFromCheckpoint(failed({ checkpointBytes: 0 })), false, "nothing to resume");
-  assert.equal(canRetryFromCheckpoint(failed({ error: "Permission denied" })), false, "content errors restart");
-  assert.equal(canRetryFromCheckpoint(failed({ isDirectory: true })), false);
-  assert.equal(canRetryFromCheckpoint(failed({ parentTaskId: "dir" })), false);
-  assert.equal(canRetryFromCheckpoint(failed({ status: "cancelled" })), false);
-  assert.equal(canRetryFromCheckpoint(failed({ retryable: false })), false);
-  assert.equal(canRetryFromCheckpoint(failed({ direction: "download" })), false, "downloads keep the owner retry");
-  assert.equal(canRetryFromCheckpoint(failed({ direction: "remote-to-remote" })), false, "remote copies keep the owner retry");
-  assert.equal(canRetryFromCheckpoint(failed({ direction: "local-copy" })), false);
-  assert.equal(canRetryFromCheckpoint(undefined), false);
-});
@@ -1,25 +0,0 @@
-import type { TransferTask } from "../../../domain/models";
-
-// Failures that only mean "the SSH/SFTP connection went away". The staged
-// .part is intact up to the checkpoint, so Retry can continue from it instead
-// of restarting at byte 0 (which also strands the old stage on the server,
-// because the new attempt stages under a fresh transfer id).
-const SESSION_LOSS_ERROR = /SFTP (channel closed|session lost)|ECONNRESET|EPIPE|Not connected|No response from server|Keepalive timeout|connection (lost|closed|reset)/i;
-
-/**
- * True when Retry should resume the same task from its checkpoint.
- * Only local-to-remote uploads (`direction === "upload"`) do this. Downloads
- * and remote copies have no unfingerprinted stage to keep, so they stay on
- * the owner's fresh retry.
- */
-export function canRetryFromCheckpoint(task: TransferTask | undefined): boolean {
-  if (!task) return false;
-  return task.status === "failed"
-    && !task.isDirectory
-    && !task.parentTaskId
-    && task.retryable !== false
-    && !task.conflict
-    && task.direction === "upload"
-    && (task.checkpointBytes ?? 0) > 0
-    && SESSION_LOSS_ERROR.test(task.error ?? "");
-}
@@ -334,111 +334,6 @@ test("live directory download rejects a Windows backslash traversal entry", asyn
  }
 });

-test("a file batch that rejects mid-walk does not emit unhandledRejection", async () => {
-  const previousWindow = (globalThis as { window?: unknown }).window;
-  const previousLocalStorage = (globalThis as { localStorage?: unknown }).localStorage;
-  const previousActEnvironment = (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT;
-  (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
-
-  const root = {
-    ...rootTask(),
-    targetPath: "C:\\Users\\alice\\Downloads\\folder",
-  };
-  let tasks: TransferTask[] = [root];
-  const transfersRef = { current: tasks };
-  const setTransfers = (update: React.SetStateAction<TransferTask[]>) => {
-    tasks = typeof update === "function" ? update(tasks) : update;
-    transfersRef.current = tasks;
-  };
-  let releaseLater!: () => void;
-  const laterGate = new Promise<void>((resolve) => {
-    releaseLater = resolve;
-  });
-  let laterListingStarted!: () => void;
-  const laterListing = new Promise<void>((resolve) => {
-    laterListingStarted = resolve;
-  });
-  (globalThis as { window?: unknown }).window = {
-    netcatty: {
-      mkdirLocal: async () => undefined,
-      statLocal: async () => ({ type: "directory" }),
-    },
-  };
-  (globalThis as { localStorage?: unknown }).localStorage = {
-    getItem: () => null,
-    setItem: () => undefined,
-    removeItem: () => undefined,
-  };
-
-  let operations: ReturnType<typeof useSftpDirectoryTransferOps> | undefined;
-  let renderer: ReactTestRenderer | null = null;
-  const Probe = () => {
-    operations = useSftpDirectoryTransferOps({
-      ownerId: "owner",
-      cancelledTasksRef: { current: new Set() },
-      pausedTasksRef: { current: new Set() },
-      waitUntilTransferResumed: async () => undefined,
-      activeChildIdsRef: { current: new Map() },
-      transfersRef,
-      setTransfers,
-      listLocalFiles: async () => [],
-      listRemoteFiles: async (_sftpId: string, path: string) => {
-        if (path === "/source") return [directoryEntry("bad"), directoryEntry("later")];
-        if (path === "/source/bad") return [fileEntry("..\\outside.txt")];
-        laterListingStarted();
-        await laterGate;
-        return [];
-      },
-    });
-    return null;
-  };
-  const unhandled: unknown[] = [];
-  const onUnhandled = (reason: unknown) => {
-    unhandled.push(reason);
-  };
-  const rejectionText = (reason: unknown) => (
-    reason instanceof Error ? reason.message : String(reason)
-  );
-  process.on("unhandledRejection", onUnhandled);
-
-  let running: Promise<number> | undefined;
-  try {
-    await act(async () => {
-      renderer = create(React.createElement(Probe));
-    });
-    assert.ok(operations);
-    running = operations.transferDirectory(
-      root,
-      "source-sftp",
-      null,
-      false,
-      true,
-      "auto",
-      "auto",
-      root.id,
-    );
-    await laterListing;
-    // The bad directory's batch is already queued. End this turn while the
-    // sibling listing is still blocked so an unhandled rejection can surface.
-    await new Promise((resolve) => setImmediate(resolve));
-    assert.deepEqual(unhandled.map(rejectionText), []);
-    releaseLater();
-    await assert.rejects(running, /unsafe transfer path/i);
-    await new Promise((resolve) => setImmediate(resolve));
-    assert.deepEqual(unhandled.map(rejectionText), []);
-  } finally {
-    releaseLater();
-    await running?.catch(() => {});
-    process.off("unhandledRejection", onUnhandled);
-    await act(async () => {
-      renderer?.unmount();
-    });
-    (globalThis as { window?: unknown }).window = previousWindow;
-    (globalThis as { localStorage?: unknown }).localStorage = previousLocalStorage;
-    (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = previousActEnvironment;
-  }
-});
-
 for (const ownerChange of ["same", "changed-active", "changed-completed"] as const) {
 test(`live folder settles superseded ownership without clobbering its replacement: ${ownerChange}`, async () => {
  const { sftpTransferCenterStore } = await import("../sftpTransferCenterStore");
@@ -23,7 +23,6 @@ import {
  DEFAULT_SFTP_DIRECTORY_LISTING_CONCURRENCY,
  resolveSftpDirectoryListingConcurrency,
  resolveSftpSkipUnchangedEnabled,
-  resolveSftpTransferConcurrency,
  runSftpTransferWorkers,
 } from "./transferConcurrency";
 import { getSftpTransferResourceKeys, globalSftpTransferScheduler } from "./globalTransferScheduler";
@@ -79,30 +78,11 @@ function createDirectoryListingGate(concurrency = DEFAULT_SFTP_DIRECTORY_LISTING
  };
 }

-/** Observed at queue time so a mid-walk rejection is not unhandled. */
-type QueuedFileBatch =
-  | { ok: true; errors: number }
-  | { ok: false; error: unknown };
-
 type DirectoryDiscoveryProgress = {
  discoveredFiles: number;
  nextEntryIndex: number;
  /** Tree-wide semaphore so nested parallel walks cannot multiply listings. */
  listingGate?: ReturnType<typeof createDirectoryListingGate>;
-  /**
-   * Tree-wide file-transfer gate (transfer concurrency setting). Each directory
-   * hands its files to workers that share this gate, and the walk does not wait
-   * for a directory's files before moving on, so there is no per-directory
-   * barrier: trees of many small directories keep N files in flight.
-   */
-  fileGate?: ReturnType<typeof createDirectoryListingGate>;
-  /**
-   * Per-directory file batches. Each promise is settled when queued; the root
-   * walk inspects the outcomes after discovery.
-   */
-  pendingFileBatches?: Promise<QueuedFileBatch>[];
-  /** First session loss seen by any batch; later batches stop claiming files. */
-  sessionLostError?: Error | null;
 };

 function isCancelledLocalOrGlobal(
@@ -547,7 +527,7 @@ export function useSftpDirectoryTransferOps({
  };

  /** Returns number of failed child file transfers */
-  const walkDirectory = async (
+  const transferDirectory = async (
    task: TransferTask,
    sourceSftpId: string | null,
    targetSftpId: string | null,
@@ -561,8 +541,7 @@ export function useSftpDirectoryTransferOps({
    followSymlinks = false, // Only true for downloadToLocal — uploads/copies treat symlinks as files
    discoveryProgress?: DirectoryDiscoveryProgress,
    traversalBudget?: SftpDirectoryTraversalBudget,
-    rootProgress?: DirectoryDiscoveryProgress,
-  ): Promise<number> => {
+  ) => {
    // Check if task or root task was cancelled before starting
    if (cancelledTasksRef.current.has(task.id) || cancelledTasksRef.current.has(rootTaskId)) {
      throw new Error("Transfer cancelled");
@@ -573,12 +552,11 @@ export function useSftpDirectoryTransferOps({
    // as soon as each directory is listed; compressed upload is a separate path.
    // UI should treat totalBytes as "discovered so far", not a fixed grand total.
    let totalErrors = 0;
-    const progress: DirectoryDiscoveryProgress = discoveryProgress ?? rootProgress ?? {
+    const progress = discoveryProgress ?? {
      discoveredFiles: 0,
      nextEntryIndex: 0,
      listingGate: createDirectoryListingGate(resolveSftpDirectoryListingConcurrency()),
    };
-    if (!progress.pendingFileBatches) progress.pendingFileBatches = [];
    if (!progress.listingGate) {
      progress.listingGate = createDirectoryListingGate(resolveSftpDirectoryListingConcurrency());
    }
@@ -706,7 +684,7 @@ export function useSftpDirectoryTransferOps({
        };

        const isSymlink = dir.type === "symlink";
-        totalErrors += await walkDirectory(
+        totalErrors += await transferDirectory(
          childTask,
          sourceSftpId,
          targetSftpId,
@@ -743,21 +721,11 @@ export function useSftpDirectoryTransferOps({
      let sessionLostError: Error | null = null;
      const directoryEntryBase = progress.nextEntryIndex;
      progress.nextEntryIndex += regularFiles.length;
-      const directoryFiles = regularFiles;
-      if (!progress.fileGate) {
-        // Same setting runSftpTransferWorkers reads, created on first file.
-        progress.fileGate = createDirectoryListingGate(resolveSftpTransferConcurrency(
-          () => localStorageAdapter.readNumber(STORAGE_KEY_SFTP_TRANSFER_CONCURRENCY),
-        ));
-      }
-      const fileGate = progress.fileGate;

-      const fileBatch = (async (): Promise<number> => {
      await runSftpTransferWorkers(
-        directoryFiles,
+        regularFiles,
        () => localStorageAdapter.readNumber(STORAGE_KEY_SFTP_TRANSFER_CONCURRENCY),
-        async (file, fileIndex) => fileGate.run(async () => {
-          if (!sessionLostError && progress.sessionLostError) sessionLostError = progress.sessionLostError;
+        async (file, fileIndex) => {
          if (sessionLostError) throw sessionLostError;
          if (cancelledTasksRef.current.has(task.id) || cancelledTasksRef.current.has(rootTaskId)) {
            throw new Error("Transfer cancelled");
@@ -1025,7 +993,6 @@ export function useSftpDirectoryTransferOps({
            );
            if (isSessionError(err) && !sessionLostError) {
              sessionLostError = err instanceof Error ? err : new Error(message);
-              progress.sessionLostError = progress.sessionLostError ?? sessionLostError;
              // Fail remaining queued siblings quickly with a clear cause.
              setTransfers((prev) => prev.map((t) => (
                t.parentTaskId === rootTaskId
@@ -1048,10 +1015,10 @@ export function useSftpDirectoryTransferOps({
              await waitWhileTransferPaused(rootTaskId);
            }
          }
-        }),
+        },
        {
          beforeClaim: async () => {
-            if (sessionLostError || progress.sessionLostError) return;
+            if (sessionLostError) return;
            await waitWhileTransferPaused(rootTaskId);
          },
        },
@@ -1063,69 +1030,17 @@ export function useSftpDirectoryTransferOps({
        throw err;
      });

+      totalErrors += errors.length;
      if (sessionLostError) {
        logger.warn("[SFTP] Directory transfer stopped early: session lost", sessionLostError.message);
      } else if (errors.length > 0) {
        logger.debug?.("[SFTP] Some files in directory transfer failed", errors);
      }
-      return errors.length;
-      })();
-      // Do not wait here: the walk continues into sibling directories while
-      // this directory's files drain through the shared fileGate. Settle the
-      // batch now so a failure during that walk (unsafe filename, unexpected
-      // worker error) is handled. The root drain still surfaces the error.
-      progress.pendingFileBatches.push(fileBatch.then(
-        (errors): QueuedFileBatch => ({ ok: true, errors }),
-        (error: unknown): QueuedFileBatch => ({ ok: false, error }),
-      ));
    }

    return totalErrors;
  };

-  const transferDirectory = async (
-    ...args: Parameters<typeof walkDirectory>
-  ): Promise<number> => {
-    const [, , , , , , , , , , , discoveryProgress, traversalBudget] = args;
-    if (discoveryProgress) return walkDirectory(...args);
-    // Root of a folder task: own the tree-wide progress so we can drain every
-    // directory's file batch, even when the walk itself throws, before the
-    // caller decides the folder's final state.
-    const rootProgress: DirectoryDiscoveryProgress = {
-      discoveredFiles: 0,
-      nextEntryIndex: 0,
-      listingGate: createDirectoryListingGate(resolveSftpDirectoryListingConcurrency()),
-      pendingFileBatches: [],
-    };
-    let walkErrors = 0;
-    let walkError: unknown = null;
-    try {
-      const [task, sourceSftpId, targetSftpId, sourceIsLocal, targetIsLocal, sourceEncoding,
-        targetEncoding, rootTaskId, sameHost, symlinkDepth, followSymlinks] = args;
-      walkErrors = await walkDirectory(
-        task, sourceSftpId, targetSftpId, sourceIsLocal, targetIsLocal, sourceEncoding,
-        targetEncoding, rootTaskId, sameHost, symlinkDepth, followSymlinks,
-        undefined, traversalBudget, rootProgress,
-      );
-    } catch (error) {
-      walkError = error;
-    }
-    let fileErrors = 0;
-    let batchError: unknown = null;
-    const batches = rootProgress.pendingFileBatches!;
-    for (let index = 0; index < batches.length; index += 1) {
-      const outcome = await batches[index];
-      if (outcome.ok) {
-        fileErrors += outcome.errors;
-      } else {
-        batchError = batchError ?? outcome.error;
-      }
-    }
-    if (walkError) throw walkError;
-    if (batchError) throw batchError;
-    return walkErrors + fileErrors;
-  };
-

  return { transferFile, transferDirectory };
 }
@@ -1,226 +0,0 @@
-/** @test lifecycle repaints coalesce to one frame and still settle the final status */
-import assert from "node:assert/strict";
-import test from "node:test";
-import React from "react";
-import { act, create, type ReactTestRenderer } from "react-test-renderer";
-
-import type { TransferTask } from "../../../domain/models";
-import { sftpTransferCenterStore } from "../sftpTransferCenterStore";
-import { latchTransferPauseTree, releaseTransferPauseTree } from "./transferPauseLatch";
-import { useSftpTransfers } from "./useSftpTransfers";
-
-type Frame = { id: number; callback: (time: number) => void; cancelled: boolean };
-
-function installFrameQueue() {
-  const previousWindow = (globalThis as { window?: unknown }).window;
-  const previousActFlag = (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT;
-  (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
-  const frames: Frame[] = [];
-  let nextId = 1;
-  const requestAnimationFrame = (callback: (time: number) => void) => {
-    const frame: Frame = { id: nextId++, callback, cancelled: false };
-    frames.push(frame);
-    return frame.id;
-  };
-  const cancelAnimationFrame = (id: number) => {
-    const frame = frames.find((candidate) => candidate.id === id);
-    if (frame) frame.cancelled = true;
-  };
-  (globalThis as { window?: unknown }).window = {
-    netcatty: {},
-    requestAnimationFrame,
-    cancelAnimationFrame,
-  };
-  return {
-    frames,
-    flush: async () => {
-      const pending = frames.splice(0, frames.length).filter((frame) => !frame.cancelled);
-      await act(async () => {
-        for (const frame of pending) frame.callback(0);
-      });
-      return pending.length;
-    },
-    restore: () => {
-      (globalThis as { window?: unknown }).window = previousWindow;
-      (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = previousActFlag;
-    },
-  };
-}
-
-function makeTask(id: string, status: TransferTask["status"], error?: string): TransferTask {
-  return {
-    id,
-    fileName: `${id}.txt`,
-    sourcePath: `/source/${id}.txt`,
-    targetPath: `/target/${id}.txt`,
-    sourceConnectionId: "local",
-    targetConnectionId: "remote",
-    direction: "upload",
-    status,
-    error,
-    totalBytes: 10,
-    transferredBytes: status === "completed" ? 10 : 2,
-    speed: status === "transferring" ? 1 : 0,
-    startTime: 1,
-    isDirectory: false,
-    resumable: true,
-  };
-}
-
-function mount(ownerId: string) {
-  let ops: ReturnType<typeof useSftpTransfers> | undefined;
-  let renderer: ReactTestRenderer | undefined;
-  function Probe() {
-    ops = useSftpTransfers({
-      ownerId,
-      getActivePane: () => null,
-      getPaneByConnectionId: () => null,
-      getTabByConnectionId: () => null,
-      updateTab: () => undefined,
-      refresh: async () => undefined,
-      clearCacheForConnection: () => undefined,
-      handleSessionError: () => undefined,
-      sftpSessionsRef: { current: new Map() },
-      connectionCacheKeyMapRef: { current: new Map() },
-      listLocalFiles: async () => [],
-      listRemoteFiles: async () => [],
-    });
-    return null;
-  }
-  return {
-    get ops() {
-      return ops;
-    },
-    render: async () => {
-      await act(async () => { renderer = create(React.createElement(Probe)); });
-    },
-    unmount: async () => {
-      await act(async () => { renderer?.unmount(); });
-      renderer = undefined;
-    },
-  };
-}
-
-test("lifecycle frames keep the final completion, pause, cancel, and error status", async () => {
-  const ownerId = "lifecycle-flush-final-status";
-  const queue = installFrameQueue();
-  const view = mount(ownerId);
-  const taskId = "lifecycle-row";
-  try {
-    await view.render();
-    const stages: Array<{ status: TransferTask["status"]; error?: string }> = [
-      { status: "transferring" },
-      { status: "paused" },
-      { status: "cancelled" },
-      { status: "failed", error: "connection reset" },
-      { status: "completed" },
-    ];
-    for (const stage of stages) {
-      await act(async () => {
-        sftpTransferCenterStore.publishOwner(ownerId, [makeTask(taskId, stage.status, stage.error)]);
-      });
-      const paintsNow = stage.status !== "transferring";
-      if (paintsNow) {
-        assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 0);
-      } else {
-        assert.notEqual(view.ops?.transfers.find((row) => row.id === taskId)?.status, stage.status);
-        assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 1);
-        assert.equal(await queue.flush(), 1);
-      }
-      const painted = view.ops?.transfers.find((row) => row.id === taskId);
-      assert.equal(painted?.status, stage.status);
-      assert.equal(painted?.error, stage.error);
-      assert.equal(
-        sftpTransferCenterStore.getOwnerTasks(ownerId).find((row) => row.id === taskId)?.status,
-        stage.status,
-      );
-    }
-  } finally {
-    sftpTransferCenterStore.dismiss(taskId);
-    await view.unmount();
-    queue.restore();
-  }
-});
-
-test("parent pause paints while a child frame is pending and a stale publish cannot reopen it", async () => {
-  const ownerId = "lifecycle-flush-parent-pause";
-  const queue = installFrameQueue();
-  const view = mount(ownerId);
-  const parentId = "folder-parent";
-  const childId = "folder-child";
-  const parent = (status: TransferTask["status"]): TransferTask => ({
-    ...makeTask(parentId, status),
-    isDirectory: true,
-    progressMode: "files",
-    lifecycleEpoch: 4,
-  });
-  const child = (status: TransferTask["status"]): TransferTask => ({
-    ...makeTask(childId, status),
-    parentTaskId: parentId,
-    lifecycleEpoch: 4,
-  });
-  try {
-    await view.render();
-    sftpTransferCenterStore.publishOwner(ownerId, [parent("transferring"), child("transferring")]);
-    assert.equal(view.ops?.transfers.length, 0, "child lifecycle churn stays on the pending frame");
-    assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 1);
-
-    // Pause lands while that frame is still queued. Latch afterwards: the
-    // control-epoch guard drops a panel publish that arrives already latched,
-    // and Resume is the equal-epoch republish that happens only after unlatch.
-    await act(async () => {
-      sftpTransferCenterStore.publishOwner(ownerId, [parent("paused"), child("paused")]);
-    });
-    assert.equal(view.ops?.transfers.find((row) => row.id === parentId)?.status, "paused");
-    assert.equal(view.ops?.transfers.find((row) => row.id === childId)?.status, "paused");
-    assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 0, "pause cancels the pre-pause frame");
-
-    latchTransferPauseTree(parentId, [childId]);
-    await act(async () => {
-      sftpTransferCenterStore.publishOwner(ownerId, [parent("transferring"), child("paused")]);
-    });
-    await queue.flush();
-    assert.equal(sftpTransferCenterStore.getTask(parentId)?.status, "paused");
-    assert.equal(sftpTransferCenterStore.getTask(childId)?.status, "paused");
-    const paintedParent = view.ops?.transfers.find((row) => row.id === parentId);
-    assert.equal(paintedParent?.status, "paused");
-    assert.equal(
-      view.ops?.transfers.filter((row) => (
-        !row.parentTaskId && ["pending", "queued", "transferring", "pausing"].includes(row.status)
-      )).length,
-      0,
-    );
-  } finally {
-    releaseTransferPauseTree(parentId, [childId]);
-    sftpTransferCenterStore.dismiss(parentId);
-    await view.unmount();
-    queue.restore();
-  }
-});
-
-test("unmount cancels the pending lifecycle frame and remount reads the settled store row", async () => {
-  const ownerId = "lifecycle-flush-unmount";
-  const queue = installFrameQueue();
-  const view = mount(ownerId);
-  const taskId = "lifecycle-unmount-row";
-  try {
-    await view.render();
-    sftpTransferCenterStore.publishOwner(ownerId, [makeTask(taskId, "failed", "write failed")]);
-    assert.equal(view.ops?.transfers.length, 0);
-    assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 1);
-
-    await view.unmount();
-    assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 0);
-    assert.equal(await queue.flush(), 0);
-
-    await view.render();
-    const painted = view.ops?.transfers.find((row) => row.id === taskId);
-    assert.equal(painted?.status, "failed");
-    assert.equal(painted?.error, "write failed");
-    assert.equal(queue.frames.filter((frame) => !frame.cancelled).length, 0);
-  } finally {
-    sftpTransferCenterStore.dismiss(taskId);
-    await view.unmount();
-    queue.restore();
-  }
-});
@@ -440,9 +440,6 @@ test("stat-less remote source keeps the listing size in the overwrite dialog and
        "left",
        "right",
      );
-      // Lifecycle paints coalesce to one frame. The plan lives on the ref
-      // immediately; React state catches up on the queued animation frame.
-      await new Promise((resolve) => setTimeout(resolve, 0));
    });

    assert.equal(started.length, 0, "an unresolved conflict must not start the transfer");
@@ -34,7 +34,6 @@ import {
  resolveDirectDirectoryDownloadFinalStatus,
 } from "./downloadTransferTask";
 import {
-  isTransferOrRootPauseLatched,
  releaseTransferPauseTree,
  waitUntilTransferPauseReleased,
 } from "./transferPauseLatch";
@@ -159,89 +158,6 @@ export function finishTransferTask(
  return status;
 }

-const STICKY_CONTROL_STATUSES = new Set<TransferStatus>([
-  "paused",
-  "pausing",
-  "cancelled",
-  "completed",
-  "failed",
-  "interrupted",
-  "attention",
-]);
-
-const LIVE_QUEUE_STATUSES = new Set<TransferStatus>([
-  "transferring",
-  "pending",
-  "queued",
-]);
-
-/**
- * Pause, resume, and cancel paint on the same turn. Per-file complete/queue
- * churn stays on the animation frame so a folder upload does not commit once
- * per child.
- */
-export function shouldPaintTransferControlNow(
-  previous: readonly TransferTask[],
-  next: readonly TransferTask[],
-): boolean {
-  const prevById = new Map(previous.map((row) => [row.id, row]));
-  return next.some((row) => {
-    const prevRow = prevById.get(row.id);
-    if (prevRow?.status === row.status) return false;
-    if (row.status === "paused" || row.status === "pausing" || row.status === "cancelled") return true;
-    if (prevRow && (prevRow.status === "paused" || prevRow.status === "pausing" || prevRow.status === "cancelled")) {
-      return true;
-    }
-    if (
-      !row.parentTaskId
-      && prevRow
-      && (STICKY_CONTROL_STATUSES.has(row.status) || STICKY_CONTROL_STATUSES.has(prevRow.status))
-    ) {
-      return true;
-    }
-    return false;
-  });
-}
-
-/**
- * Child lifecycle updates clone the ref they saw. If that clone still says the
- * folder is transferring after the store already paused it, publishing the
- * clone reopens the parent. An explicit status edit (resume, retry) is kept.
- */
-export function reconcilePanelRowsWithStore(
-  previous: readonly TransferTask[],
-  next: readonly TransferTask[],
-  storeRows: readonly TransferTask[],
-): TransferTask[] {
-  const prevById = new Map(previous.map((row) => [row.id, row]));
-  const storeById = new Map(storeRows.map((row) => [row.id, row]));
-  let changed = false;
-  const reconciled = next.map((row) => {
-    const storeRow = storeById.get(row.id);
-    const prevRow = prevById.get(row.id);
-    if (!storeRow || !STICKY_CONTROL_STATUSES.has(storeRow.status) || !LIVE_QUEUE_STATUSES.has(row.status)) {
-      return row;
-    }
-    // A full-list write can disagree with the ref only because the ref already
-    // moved to the store's pause. That is a stale snapshot, not Resume.
-    // Resume releases the latch before it republishes transferring.
-    const rootId = row.parentTaskId ?? row.id;
-    const latchedReopen = isTransferOrRootPauseLatched(rootId, row.id);
-    if (prevRow && prevRow.status !== row.status && !latchedReopen) return row;
-    if (row.status === storeRow.status) return row;
-    changed = true;
-    return {
-      ...row,
-      status: storeRow.status,
-      speed: 0,
-      error: storeRow.error,
-      endTime: storeRow.endTime,
-      pauseUnavailableReason: storeRow.pauseUnavailableReason,
-    };
-  });
-  return changed ? reconciled : next as TransferTask[];
-}
-
 /** User-facing path exclusivity notice (toast + logs). */
 function notifyPathConflict(
  existing: Pick<TransferTask, "fileName" | "status">,
@@ -321,85 +237,29 @@ export const useSftpTransfers = ({
  const transfersRef = useRef(transfers);
  const conflictsRef = useRef(conflicts);
  conflictsRef.current = conflicts;
+  // When the retained panel is re-opened, catch up React state from the ref that
+  // kept receiving progress while the surface was hidden.
+  useEffect(() => {
+    if (!surfaceVisible) return;
+    setTransfersState(transfersRef.current);
+  }, [surfaceVisible]);
+
  // Keep owner lifecycle changes in the global transfer store. Byte progress
  // arrives independently through the unified process-wide event stream.
  //
  // Do not pre-assign transfersRef before publishing the same array reference —
  // identity equality skips the store merge (avoids store↔listener loops).
-  // Lifecycle writers (child add/start/complete) fire several times per file.
-  // Repainting the whole SFTP view synchronously on each one saturates the
-  // renderer on folders with many small files, which then throttles the
-  // transfer itself. transfersRef/store stay authoritative; React state
-  // catches up once per frame, except pause/resume/cancel and folder terminal
-  // rows, which paint immediately.
-  //
-  // A frame queued for child churn must not commit a pre-pause ref after the
-  // store has already paused the parent. The flush re-reads the store, and a
-  // synchronous control paint bumps paintEpoch so that queued frame no-ops.
-  const stateFlushHandleRef = useRef<{ cancel: () => void } | null>(null);
-  const paintEpochRef = useRef(0);
-  const cancelScheduledTransferPaint = useCallback(() => {
-    stateFlushHandleRef.current?.cancel();
-    stateFlushHandleRef.current = null;
-  }, []);
-  const paintTransfersNow = useCallback((rows: TransferTask[]) => {
-    cancelScheduledTransferPaint();
-    paintEpochRef.current += 1;
-    transfersRef.current = rows;
-    setTransfersState(rows);
-  }, [cancelScheduledTransferPaint]);
-  const scheduleTransfersStateFlush = useCallback(() => {
-    if (stateFlushHandleRef.current) return;
-    const epochAtSchedule = paintEpochRef.current;
-    const flush = () => {
-      stateFlushHandleRef.current = null;
-      // A pause/resume/cancel/terminal paint landed after this frame was queued.
-      if (paintEpochRef.current !== epochAtSchedule) return;
-      const storeRows = sftpTransferCenterStore.getOwnerTasks(ownerId);
-      const painted = reconcilePanelRowsWithStore(transfersRef.current, transfersRef.current, storeRows);
-      paintEpochRef.current += 1;
-      transfersRef.current = painted;
-      setTransfersState(painted);
-    };
-    if (typeof window !== "undefined" && typeof window.requestAnimationFrame === "function") {
-      const id = window.requestAnimationFrame(flush);
-      stateFlushHandleRef.current = { cancel: () => window.cancelAnimationFrame(id) };
-    } else {
-      const id = setTimeout(flush, 16);
-      stateFlushHandleRef.current = { cancel: () => clearTimeout(id) };
-    }
-  }, [ownerId]);
-  useEffect(() => () => {
-    cancelScheduledTransferPaint();
-  }, [cancelScheduledTransferPaint]);
-  // When the retained panel is re-opened, catch up React state from the ref that
-  // kept receiving progress while the surface was hidden. Cancel any frame that
-  // was queued against the hidden snapshot so it cannot paint over this catch-up.
-  useEffect(() => {
-    if (!surfaceVisible) return;
-    paintTransfersNow(transfersRef.current);
-  }, [paintTransfersNow, surfaceVisible]);
  const setTransfers = useCallback((update: SetStateAction<TransferTask[]>) => {
    const prev = transfersRef.current;
    const next = typeof update === "function"
      ? (update as (value: TransferTask[]) => TransferTask[])(prev)
      : update;
    if (next === prev) return;
-    const reconciled = reconcilePanelRowsWithStore(
-      prev,
-      next,
-      sftpTransferCenterStore.getOwnerTasks(ownerId),
-    );
-    if (reconciled === prev) return;
-    sftpTransferCenterStore.publishOwner(ownerId, reconciled);
+    sftpTransferCenterStore.publishOwner(ownerId, next);
    const canonical = sftpTransferCenterStore.getOwnerTasks(ownerId);
-    if (shouldPaintTransferControlNow(prev, canonical)) {
-      paintTransfersNow(canonical);
-      return;
-    }
    transfersRef.current = canonical;
-    scheduleTransfersStateFlush();
-  }, [ownerId, paintTransfersNow, scheduleTransfersStateFlush]);
+    setTransfersState(canonical);
+  }, [ownerId]);

  // Coalesce progress-only patches to one paint per animation frame. Without
  // this, each stream tick maps the full transfer list + publishOwner + store
@@ -431,19 +291,9 @@ export const useSftpTransfers = ({
    const prevPending = pendingProgressByIdRef.current.get(taskId) || {};
    pendingProgressByIdRef.current.set(taskId, { ...prevPending, ...updates });
    // Keep ref hot for cancel/pause checks without waiting for paint.
-    // A byte tick that still says "transferring" must not reopen a latched pause.
-    transfersRef.current = transfersRef.current.map((row) => {
-      if (row.id !== taskId) return row;
-      const merged = { ...row, ...updates };
-      const latched = isTransferOrRootPauseLatched(row.parentTaskId ?? row.id, row.id);
-      if (
-        (latched || row.status === "paused" || row.status === "pausing")
-        && (updates.status === "transferring" || updates.status === "pending" || updates.status === "queued")
-      ) {
-        return { ...merged, status: row.status, speed: 0 };
-      }
-      return merged;
-    });
+    transfersRef.current = transfersRef.current.map((row) => (
+      row.id === taskId ? { ...row, ...updates } : row
+    ));
    scheduleProgressFlush();
  }, [scheduleProgressFlush]);
  useEffect(() => () => {
@@ -1222,9 +1072,8 @@ export const useSftpTransfers = ({
          const next = transfersRef.current.map((candidate) => (
            candidate.id === task.id ? canonicalTask : candidate
          ));
-          // Terminal rows used to setState directly and leave a child frame
-          // queued. That frame later painted the pre-terminal ref.
-          paintTransfersNow(next);
+          transfersRef.current = next;
+          setTransfersState(next);
        },
      );

@@ -2275,16 +2124,11 @@ export const useSftpTransfers = ({
  // panel list; byte-only ticks update refs without repainting the whole panel.
  useEffect(() => {
    return sftpTransferCenterStore.subscribe(() => {
-      const previous = transfersRef.current;
      const ownerRows = sftpTransferCenterStore.getSnapshot().tasks.filter((task) => task.ownerId === ownerId);
      transfersRef.current = ownerRows;
-      if (shouldPaintTransferControlNow(previous, ownerRows)) {
-        paintTransfersNow(ownerRows);
-        return;
-      }
-      scheduleTransfersStateFlush();
+      setTransfersState(ownerRows);
    });
-  }, [ownerId, paintTransfersNow, scheduleTransfersStateFlush]);
+  }, [ownerId]);

  useEffect(() => sftpTransferCenterStore.subscribeProgress(() => {
    const liveById = new Map(sftpTransferCenterStore.getSnapshot().tasks.map((task) => [task.id, task]));
@@ -97,85 +97,6 @@ test("background-agent retry after restart uses fresh dedicated recovery instead
  assert.equal(store.getTask("background-retry")?.status, "completed");
 });

-for (const [label, error, expectResume] of [
-  ["dead channel", "SFTP channel closed", true],
-  ["lost session", "SFTP session lost. Please reconnect.", true],
-  ["content failure", "Permission denied", false],
-] as const) {
-  test(`panel Retry after ${label} ${expectResume ? "resumes the same task from its checkpoint" : "keeps the restart-from-0 retry"}`, async () => {
-    const controllerRetries: string[] = [];
-    const dedicatedTasks: TransferTask[] = [];
-    const store = createSftpTransferCenterStore();
-    store.registerOwner("panel-a", {
-      pause: async () => {},
-      resume: async () => {},
-      cancel: async () => {},
-      retry: async (id) => { controllerRetries.push(id); },
-      prioritize: async () => {},
-      dismiss: () => {},
-    });
-    store.setDedicatedResumeHandler(async (task) => {
-      dedicatedTasks.push(task);
-      return { success: true };
-    });
-    store.publishOwner("panel-a", [{
-      ...makeTask("dropped", "failed"),
-      totalBytes: 100,
-      checkpointBytes: 37,
-      transferredBytes: 37,
-      error,
-      endTime: Date.now(),
-    }]);
-
-    await store.retry("dropped");
-
-    if (expectResume) {
-      assert.deepEqual(controllerRetries, [], "no fresh-id restart");
-      assert.equal(dedicatedTasks.length, 1);
-      assert.equal(dedicatedTasks[0]?.id, "dropped", "same id keeps the same staged .part");
-      assert.equal(dedicatedTasks[0]?.checkpointBytes, 37);
-      assert.equal(dedicatedTasks[0]?.reconnectRequired, true);
-    } else {
-      assert.deepEqual(controllerRetries, ["dropped"]);
-      assert.equal(dedicatedTasks.length, 0);
-    }
-  });
-}
-
-test("panel Retry after a dropped download or remote copy keeps the owner restart", async () => {
-  for (const direction of ["download", "remote-to-remote"] as const) {
-    const controllerRetries: string[] = [];
-    const dedicatedTasks: TransferTask[] = [];
-    const store = createSftpTransferCenterStore();
-    store.registerOwner("panel-a", {
-      pause: async () => {},
-      resume: async () => {},
-      cancel: async () => {},
-      retry: async (id) => { controllerRetries.push(id); },
-      prioritize: async () => {},
-      dismiss: () => {},
-    });
-    store.setDedicatedResumeHandler(async (task) => {
-      dedicatedTasks.push(task);
-      return { success: true };
-    });
-    store.publishOwner("panel-a", [{
-      ...makeTask("dropped", "failed"),
-      direction,
-      totalBytes: 100,
-      checkpointBytes: 37,
-      transferredBytes: 37,
-      error: "SFTP channel closed",
-      endTime: Date.now(),
-    }]);
-
-    await store.retry("dropped");
-
-    assert.deepEqual(controllerRetries, ["dropped"], direction);
-    assert.equal(dedicatedTasks.length, 0, direction);
-  }
-});
-
 test("resume without an owner uses a live backend transfer session when available", async (t) => {
  const resumeCalls: string[] = [];
  const previousWindow = Object.getOwnPropertyDescriptor(globalThis, "window");
@@ -42,7 +42,6 @@ import {
 } from "./sftp/globalSftpTransferControl";
 import { restoreSftpTransferHistoryCooperatively } from "./sftp/transferHistoryRestoreMigration";
 import { cancelExternalUploadRuntime } from "./sftp/externalUploadRuntime";
-import { canRetryFromCheckpoint } from "./sftp/retryFromCheckpoint";

 type Listener = () => void;
 type TaskSettlementObserver = {
@@ -366,13 +365,9 @@ export function mergeOwnerPublishedTask(
    } else if (
      existingPaused
      && (incoming.status === "transferring" || incoming.status === "pending" || incoming.status === "queued")
-      // A strictly older epoch is a stale snapshot. Equal epochs are how Resume
-      // republishes after the latch drops. While the pause latch is still held,
-      // that republish is a pre-pause panel snapshot and must not reopen the row.
-      && (
-        incomingLifecycleEpoch < existingLifecycleEpoch
-        || isTransferOrRootPauseLatched(existing.parentTaskId ?? existing.id, existing.id)
-      )
+      // Only a strictly older epoch is a stale snapshot. Equal/missing epochs must
+      // allow intentional Resume (publishOwner after unlatch) to re-open the row.
+      && incomingLifecycleEpoch < existingLifecycleEpoch
    ) {
      // Soft-drain / late progress publish must not un-pause without resume epoch.
      merged.status = existing.status;
@@ -2057,24 +2052,6 @@ export function createSftpTransferCenterStore(persistence?: StorePersistence): S
      const controller = ownerId === "background-agent"
        ? undefined
        : controllers.get(ownerId ?? "");
-      // Live panel task whose connection dropped mid-file: the stage is valid
-      // up to the checkpoint. Continue through the reconnect-resume path a
-      // restored task uses (same id, so the same staged .part) instead of a
-      // fresh id from byte 0, which strands the old stage on the server.
-      // Orphaned rows (no live owner) keep the restart-from-0 contract below.
-      if (controller && canRetryFromCheckpoint(task)) {
-        tasks = tasks.map((candidate) => candidate.id === taskId ? {
-          ...candidate,
-          status: "interrupted" as const,
-          error: undefined,
-          reconnectRequired: true,
-          speed: 0,
-          endTime: undefined,
-        } : candidate);
-        emit();
-        await this.resume(taskId);
-        return;
-      }
      if (controller) {
        await controller.retry(taskId);
        return;
@@ -33,7 +33,6 @@ import {
  filterVaultImportKeyPassphrasesAgainstExisting,
  mergeVaultImportIssues,
  resolveVaultImportKeyPassphraseConflicts,
-  toVaultImportExistingHostRef,
  type VaultImportFormat,
 } from "../../domain/vaultImport";
 import type { GroupConfig, Host, ManagedSource, SSHKey } from "../../types";
@@ -176,7 +175,6 @@ export function useVaultImportHandlers({
            files,
            encoding: options?.encoding,
            masterPassword: options?.masterPassword,
-            existingHosts: hostsRef.current.map(toVaultImportExistingHostRef),
            signal,
            onProgress: (progress) => {
              if (!signal.aborted) updateProgress(progress);
@@ -14,9 +14,8 @@ export {
  buildVaultHostMergeKey,
 } from "./vaultHostCreate";
 import { parseQuickConnectInput } from "./quickConnect";
-import { canServeAsSshJumpHost } from "./terminalProtocol";
 import { findExactHeaderIndex, findHeaderIndex, parseCsv } from "./vaultImport/csvUtils";
-import { decodeCsvKeyPath, decodeCsvLocalShell, decodeCsvPassphrase, decodeCsvProxyJump } from "./vaultImport/csvCredentialFields";
+import { decodeCsvKeyPath, decodeCsvLocalShell, decodeCsvPassphrase } from "./vaultImport/csvCredentialFields";
 import { isCsvDirectProxyValue, parseCsvProxy } from "./vaultImport/csvProxy";
 import { attachMobaXtermPasswords } from "./vaultImport/mobaXtermPasswords";
 import { decodeFinalShellPassword } from "./finalShellPassword";
@@ -101,29 +100,6 @@ const parseProxyJump = (value: string): ParsedJumpHost[] => {
    .filter((h): h is ParsedJumpHost => h !== null);
 };

-/** Vault host fields needed to bind a CSV ProxyJump hop without copying secrets. */
-export interface VaultImportExistingHostRef {
-  id: string;
-  label: string;
-  hostname: string;
-  port?: number;
-  username?: string;
-  protocol?: Host["protocol"];
-  group?: string;
-}
-
-export const toVaultImportExistingHostRef = (
-  host: Pick<Host, "id" | "label" | "hostname" | "port" | "username" | "protocol" | "group">,
-): VaultImportExistingHostRef => ({
-  id: host.id,
-  label: host.label,
-  hostname: host.hostname,
-  port: host.port,
-  username: host.username,
-  protocol: host.protocol,
-  group: host.group,
-});
-
 export type VaultImportFormat =
  | "putty"
  | "mobaxterm"
@@ -278,32 +254,9 @@ export function applyVaultImportDestination(
    return remapped;
  };

-  // Collapsing two group copies must not leave a chain pointed at the dropped id.
-  // Ids that are not part of this import (an existing vault hop) stay as they are.
-  const remappedHosts = hosts.map((host) => {
-    const currentIds = host.hostChain?.hostIds;
-    if (!currentIds?.length) return host;
-    const hostIds: string[] = [];
-    for (const hostId of currentIds) {
-      const mapped = remapHostId(hostId);
-      const nextId = mapped ?? (originalById.has(hostId) ? undefined : hostId);
-      if (!nextId || nextId === host.id || hostIds.includes(nextId)) continue;
-      hostIds.push(nextId);
-    }
-    if (hostIds.length === currentIds.length && hostIds.every((id, index) => id === currentIds[index])) {
-      return host;
-    }
-    if (hostIds.length === 0) {
-      const next = { ...host };
-      delete next.hostChain;
-      return next;
-    }
-    return { ...host, hostChain: { hostIds } };
-  });
-
  return {
    ...result,
-    hosts: remappedHosts,
+    hosts,
    groups: [group],
    keyPassphrases: remapKeyPassphrases(result.keyPassphrases, { matchSelectedKey: true }),
    // Keep remapped candidates for alias conflict checks (same as CSV same-group
@@ -468,176 +421,8 @@ const parseTarget = (
  return null;
 };

-const CSV_JUMP_PORT = 22;

-const csvJumpPort = (port: number | undefined): number => (
-  port !== undefined && Number.isInteger(port) && port >= 1 && port <= 65535 ? port : CSV_JUMP_PORT
-);
-
-type CsvJumpCandidate = {
-  id: string;
-  label: string;
-  hostname: string;
-  port?: number;
-  username?: string;
-  protocol?: Host["protocol"];
-  group?: string;
-};
-
-const csvJumpEndpointMatches = (hop: ParsedJumpHost, candidate: CsvJumpCandidate): boolean => {
-  if (!canServeAsSshJumpHost(candidate)) return false;
-  if (candidate.hostname.trim().toLowerCase() !== hop.hostname.toLowerCase()) return false;
-  if (csvJumpPort(candidate.port) !== csvJumpPort(hop.port)) return false;
-  if (hop.username && (candidate.username ?? "").trim().toLowerCase() !== hop.username.toLowerCase()) return false;
-  return true;
-};
-
-const csvJumpLabelMatches = (hop: ParsedJumpHost, candidate: CsvJumpCandidate): boolean => {
-  if (!canServeAsSshJumpHost(candidate)) return false;
-  const label = candidate.label.trim().toLowerCase();
-  if (!label || label !== hop.hostname.toLowerCase()) return false;
-  if (csvJumpPort(candidate.port) !== csvJumpPort(hop.port)) return false;
-  if (hop.username && (candidate.username ?? "").trim().toLowerCase() !== hop.username.toLowerCase()) return false;
-  return true;
-};
-
-const pickCsvJumpCandidate = <T extends { group?: string }>(matches: readonly T[], group: string | undefined): T => (
-  matches.find((candidate) => (candidate.group ?? "") === (group ?? "")) ?? matches[0]
-);
-
-const attachCsvProxyJumpChains = (
-  hosts: Host[],
-  proxyJumpByHost: ReadonlyMap<Host, { value: string; row: number }>,
-  issues: VaultImportIssue[],
-  existingHosts: readonly VaultImportExistingHostRef[],
-): Host[] => {
-  const inlineHosts: Host[] = [];
-  const matchable: CsvJumpCandidate[] = [...hosts];
-
-  const resolveHop = (hop: ParsedJumpHost, group: string | undefined): string | null => {
-    const endpointMatches = [
-      ...matchable.filter((candidate) => csvJumpEndpointMatches(hop, candidate)),
-      ...existingHosts.filter((candidate) => csvJumpEndpointMatches(hop, candidate)),
-    ];
-    if (endpointMatches.length > 0) return pickCsvJumpCandidate(endpointMatches, group).id;
-    const labelMatches = [
-      ...matchable.filter((candidate) => csvJumpLabelMatches(hop, candidate)),
-      ...existingHosts.filter((candidate) => csvJumpLabelMatches(hop, candidate)),
-    ];
-    if (labelMatches.length > 0) return pickCsvJumpCandidate(labelMatches, group).id;
-
-    const inlineKey = `${hop.hostname.toLowerCase()}|${csvJumpPort(hop.port)}|${(hop.username ?? "").toLowerCase()}`;
-    const existingInline = inlineHosts.find((host) => (
-      `${host.hostname.toLowerCase()}|${csvJumpPort(host.port)}|${(host.username ?? "").toLowerCase()}` === inlineKey
-    ));
-    if (existingInline) return existingInline.id;
-    if (!looksLikeHostnameToken(hop.hostname)) return null;
-    try {
-      const inlineHost = createHost({
-        label: hop.hostname,
-        hostname: hop.hostname,
-        username: hop.username,
-        port: hop.port,
-        protocol: "ssh",
-      });
-      inlineHosts.push(inlineHost);
-      matchable.push(inlineHost);
-      return inlineHost.id;
-    } catch {
-      return null;
-    }
-  };
-
-  for (const host of hosts) {
-    const entry = proxyJumpByHost.get(host);
-    if (!entry) continue;
-    const specs = entry.value
-      .split(",")
-      .map((part) => part.trim())
-      .filter((part) => part && part.toLowerCase() !== "none");
-    if (specs.length === 0) continue;
-
-    const resolvedIds: string[] = [];
-    const unresolved: string[] = [];
-    const inlineCountBefore = inlineHosts.length;
-    let chainRejected = false;
-    for (const spec of specs) {
-      const jump = parseJumpHostSpec(spec);
-      if (!jump) {
-        issues.push({
-          level: "warning",
-          message: `CSV row ${entry.row}: ProxyJump hop "${spec}" was ignored because it is not a valid jump host.`,
-        });
-        chainRejected = true;
-        continue;
-      }
-      const inlineCount = inlineHosts.length;
-      const resolvedId = resolveHop(jump, host.group);
-      if (!resolvedId) {
-        issues.push({
-          level: "warning",
-          message: `CSV row ${entry.row}: ProxyJump hop "${spec}" was ignored because it is not a valid jump host.`,
-        });
-        chainRejected = true;
-        continue;
-      }
-      if (inlineHosts.length > inlineCount) unresolved.push(jump.hostname);
-      if (!resolvedIds.includes(resolvedId)) resolvedIds.push(resolvedId);
-    }
-
-    if (chainRejected || resolvedIds.includes(host.id)) {
-      if (inlineHosts.length > inlineCountBefore) {
-        const droppedIds = new Set(inlineHosts.splice(inlineCountBefore).map((item) => item.id));
-        for (let index = matchable.length - 1; index >= 0; index -= 1) {
-          if (droppedIds.has(matchable[index].id)) matchable.splice(index, 1);
-        }
-      }
-      if (resolvedIds.includes(host.id)) {
-        issues.push({
-          level: "warning",
-          message: `CSV: detected circular reference in ProxyJump for "${host.label}", skipping chain.`,
-        });
-      }
-      continue;
-    }
-    if (resolvedIds.length > 0) host.hostChain = { hostIds: resolvedIds };
-    if (unresolved.length > 0) {
-      issues.push({
-        level: "warning",
-        message: `CSV: created inline jump host(s) for "${host.label}": ${unresolved.join(", ")}`,
-      });
-    }
-  }
-
-  const allHosts = [...hosts, ...inlineHosts];
-  const participatesInCycle = (hostId: string, visited: Set<string>): boolean => {
-    if (visited.has(hostId)) return true;
-    visited.add(hostId);
-    const current = allHosts.find((item) => item.id === hostId);
-    for (const chainId of current?.hostChain?.hostIds ?? []) {
-      if (!allHosts.some((item) => item.id === chainId)) continue;
-      if (participatesInCycle(chainId, visited)) return true;
-    }
-    visited.delete(hostId);
-    return false;
-  };
-  const cyclicHosts = allHosts.filter((host) => (
-    Boolean(host.hostChain?.hostIds?.length) && participatesInCycle(host.id, new Set())
-  ));
-  for (const host of cyclicHosts) {
-    issues.push({
-      level: "warning",
-      message: `CSV: detected circular dependency in jump chain for "${host.label}", removing chain.`,
-    });
-    delete host.hostChain;
-  }
-  return allHosts;
-};
-
-const importFromCsv = (
-  text: string,
-  existingHosts: readonly VaultImportExistingHostRef[] = [],
-): VaultImportResult => {
+const importFromCsv = (text: string): VaultImportResult => {
  const issues: VaultImportIssue[] = [];
  const rows = parseCsv(text).filter((r) => r.some((c) => c.trim() !== ""));
  if (rows.length === 0) {
@@ -663,7 +448,6 @@ const importFromCsv = (
  const keyPathIdx = findExactHeaderIndex(header, ["keypath", "key path", "identityfile", "identity file"]);
  const explicitPassphraseIdx = findExactHeaderIndex(header, ["passphrase", "keypassphrase", "key passphrase"]);
  const proxyIdx = findExactHeaderIndex(header, ["proxy", "proxyserver", "proxy server"]);
-  const proxyJumpIdx = findExactHeaderIndex(header, ["proxyjump"]);
  const localShellIdx = findExactHeaderIndex(header, ["localshell"]);
  const passphraseIdx = keyPathIdx >= 0 ? explicitPassphraseIdx : -1;
  const exactPasswordIdx = findExactHeaderIndex(header, ["password", "pass", "passwd"]);
@@ -698,7 +482,6 @@ const importFromCsv = (
  }

  const parsedHosts: Host[] = [];
-  const proxyJumpByHost = new Map<Host, { value: string; row: number }>();
  const keyPassphraseCandidates: Array<{
    hostKey: string;
    keyPathKey: string;
@@ -766,8 +549,6 @@ const importFromCsv = (
        message: `CSV row ${i + 2}: LocalShell was ignored because it is not a valid encoded local-shell value.`,
      });
    }
-    const proxyJumpRaw = (proxyJumpIdx >= 0 ? row[proxyJumpIdx] : undefined)?.trim();
-    const proxyJump = proxyJumpRaw ? decodeCsvProxyJump(proxyJumpRaw).trim() : "";

    if (decodedPassphrase && isEncryptedCredentialPlaceholder(decodedPassphrase)) {
      issues.push({
@@ -805,9 +586,6 @@ const importFromCsv = (
      if (localShellSpec.startDir) host.localStartDir = localShellSpec.startDir;
      if (localShellSpec.os) host.os = localShellSpec.os;
    }
-    if (proxyJump && proxyJump.toLowerCase() !== "none") {
-      proxyJumpByHost.set(host, { value: proxyJump, row: i + 2 });
-    }
    parsedHosts.push(host);
    if (keyPath && passphrase) {
      const keyPathKey = normalizeKeyPathKey(keyPath);
@@ -834,8 +612,7 @@ const importFromCsv = (
  // the shell identity is part of buildVaultHostMergeKey; otherwise importing a
  // backup with CMD and PowerShell in the same group silently keeps only the
  // first shell and flags the rest as duplicates.
-  const { hosts: dedupedHosts, duplicates } = dedupeHosts(parsedHosts);
-  const hosts = attachCsvProxyJumpChains(dedupedHosts, proxyJumpByHost, issues, existingHosts);
+  const { hosts, duplicates } = dedupeHosts(parsedHosts);
  const keyPassphrases = hosts.flatMap((host) => {
    const selectedKeyPath = host.identityFilePaths?.find((path) => path.trim())?.trim();
    if (!selectedKeyPath) return [];
@@ -1632,22 +1409,15 @@ const importFromMobaXterm = (
  };
 };

-export interface VaultImportTextOptions {
-  fileName?: string;
-  masterPassword?: string;
-  /** Hosts already in the vault. CSV ProxyJump hops bind to these by endpoint. */
-  existingHosts?: readonly VaultImportExistingHostRef[];
-}
-
 export const importVaultHostsFromText = (
  format: VaultImportFormat,
  text: string,
-  options?: VaultImportTextOptions,
+  options?: { fileName?: string; masterPassword?: string },
 ): VaultImportResult => {
  const input = text ?? "";
  switch (format) {
    case "csv":
-      return importFromCsv(input, options?.existingHosts);
+      return importFromCsv(input);
    case "putty":
      return importFromPuttyReg(input);
    case "ssh_config":
@@ -1738,40 +1508,15 @@ export function applyVaultHostImport(
  addedHosts: Host[];
 } {
  const skipDuplicates = options?.skipDuplicates !== false;
-  const existingByKey = new Map(existingHosts.map((host) => [buildVaultHostMergeKey(host), host]));
-  const droppedIdToExistingId = new Map<string, string>();
+  const existingKeys = new Set(existingHosts.map(buildVaultHostMergeKey));
  let newHosts = importResult.hosts;
  let skippedExistingCount = 0;

  if (skipDuplicates) {
    newHosts = importResult.hosts.filter((host) => {
-      const existing = existingByKey.get(buildVaultHostMergeKey(host));
-      if (!existing) return true;
-      skippedExistingCount++;
-      if (existing.id !== host.id) droppedIdToExistingId.set(host.id, existing.id);
-      return false;
-    });
-  }
-
-  if (droppedIdToExistingId.size > 0) {
-    newHosts = newHosts.map((host) => {
-      const currentIds = host.hostChain?.hostIds;
-      if (!currentIds?.length) return host;
-      const hostIds: string[] = [];
-      for (const hostId of currentIds) {
-        const mapped = droppedIdToExistingId.get(hostId) ?? hostId;
-        if (mapped === host.id || hostIds.includes(mapped)) continue;
-        hostIds.push(mapped);
-      }
-      if (hostIds.length === currentIds.length && hostIds.every((id, index) => id === currentIds[index])) {
-        return host;
-      }
-      if (hostIds.length === 0) {
-        const next = { ...host };
-        delete next.hostChain;
-        return next;
-      }
-      return { ...host, hostChain: { hostIds } };
+      const duplicate = existingKeys.has(buildVaultHostMergeKey(host));
+      if (duplicate) skippedExistingCount++;
+      return !duplicate;
    });
  }

@@ -2,7 +2,6 @@ const FORMULA_PREFIX = /^[=+\-@\t\r]/u;
 const KEY_PATH_MARKER = "__netcatty_csv_keypath_v1__:";
 const PASSPHRASE_MARKER = "__netcatty_csv_passphrase_v1__:";
 const PROXY_MARKER = "__netcatty_csv_proxy_v1__:";
-const PROXY_JUMP_MARKER = "__netcatty_csv_proxyjump_v1__:";
 const LOCAL_SHELL_MARKER = "__netcatty_csv_localshell_v1__:";

 const encodeMarkedField = (value: string, marker: string): string => (
@@ -44,14 +43,6 @@ export const decodeCsvProxy = (value: string): string => (
  decodeMarkedField(value, PROXY_MARKER)
 );

-export const encodeCsvProxyJump = (value: string): string => (
-  encodeMarkedField(value, PROXY_JUMP_MARKER)
-);
-
-export const decodeCsvProxyJump = (value: string): string => (
-  decodeMarkedField(value, PROXY_JUMP_MARKER)
-);
-
 export interface CsvLocalShellSpec {
  shell?: string;
  shellArgs?: string[];
@@ -3,9 +3,8 @@ import test from "node:test";

 import { publishActiveGlobalDefaultProxyProfileId } from "../globalDefaultProxy.ts";
 import { applyGroupDefaults } from "../groupConfig.ts";
-import { applyVaultHostImport, applyVaultImportDestination, importVaultHostsFromText } from "../vaultImport.ts";
+import { importVaultHostsFromText } from "../vaultImport.ts";
 import { exportHostsToCsvWithStats, getVaultCsvTemplate } from "./csvExport.ts";
-import { parseCsv } from "./csvUtils.ts";
 import type { Host } from "../models.ts";

 const hostDefaults = { username: "root", tags: [], os: "linux" as const };
@@ -607,230 +606,6 @@ test("CSV round-trips local-shell vault host settings", () => {
  assert.equal(roundTrippedDefault.localStartDir, undefined);
 });

-const proxyJumpCell = (csv: string, hostname: string): string => {
-  const rows = parseCsv(csv.replace(/^\uFEFF/, "")).filter((row) => row.some((cell) => cell.trim() !== ""));
-  const header = rows[0] ?? [];
-  const jumpIndex = header.indexOf("ProxyJump");
-  const hostIndex = header.findIndex((cell) => cell.toLowerCase().includes("hostname"));
-  const row = rows.slice(1).find((cells) => cells[hostIndex] === hostname);
-  return jumpIndex >= 0 ? (row?.[jumpIndex] ?? "") : "";
-};
-
-const chainHost = (id: string, label: string, hostname: string, username: string, port = 22): Host => ({
-  ...hostDefaults,
-  id,
-  label,
-  hostname,
-  username,
-  port,
-});
-
-test("CSV export writes one-hop and two-hop ProxyJump chains", () => {
-  const bastion = chainHost("jump-1", "Bastion", "bastion.example.com", "alice");
-  const second = chainHost("jump-2", "Second hop", "jump.example.com", "bob", 2222);
-  const v6 = chainHost("jump-v6", "IPv6 hop", "2001:db8::1", "carol", 2222);
-  const oneHop = chainHost("app-1", "One hop", "one.example.com", "root");
-  oneHop.hostChain = { hostIds: [bastion.id] };
-  const twoHop = chainHost("app-2", "Two hop", "two.example.com", "root");
-  twoHop.hostChain = { hostIds: [bastion.id, second.id] };
-  const viaV6 = chainHost("app-v6", "Via IPv6", "v6.example.com", "root");
-  viaV6.hostChain = { hostIds: [v6.id] };
-  const direct = chainHost("app-3", "Direct", "direct.example.com", "root");
-
-  const { csv } = exportHostsToCsvWithStats([bastion, second, v6, oneHop, twoHop, viaV6, direct]);
-
-  assert.equal(proxyJumpCell(csv, bastion.hostname), "");
-  assert.equal(proxyJumpCell(csv, oneHop.hostname), "alice@bastion.example.com");
-  assert.equal(proxyJumpCell(csv, twoHop.hostname), "alice@bastion.example.com,bob@jump.example.com:2222");
-  assert.equal(proxyJumpCell(csv, viaV6.hostname), "carol@[2001:db8::1]:2222");
-  assert.equal(proxyJumpCell(csv, direct.hostname), "");
-  assert.match(getVaultCsvTemplate().split(/\r?\n/, 1)[0] ?? "", /(^|,)ProxyJump(,|$)/);
-});
-
-test("CSV round-trips a jump host chain onto the imported hosts", () => {
-  const bastion = chainHost("jump-1", "Bastion", "bastion.example.com", "alice");
-  const second = chainHost("jump-2", "Second hop", "jump.example.com", "bob", 2222);
-  const target = chainHost("app", "App", "app.example.com", "root");
-  target.group = "Prod";
-  target.hostChain = { hostIds: [bastion.id, second.id] };
-
-  const { csv } = exportHostsToCsvWithStats([bastion, second, target]);
-  const imported = importVaultHostsFromText("csv", csv);
-  const byHostname = new Map(imported.hosts.map((host) => [host.hostname, host]));
-  const importedTarget = byHostname.get(target.hostname);
-  const importedBastion = byHostname.get(bastion.hostname);
-  const importedSecond = byHostname.get(second.hostname);
-
-  assert.equal(imported.issues.length, 0);
-  assert.deepEqual(importedTarget?.hostChain?.hostIds, [importedBastion?.id, importedSecond?.id]);
-  assert.equal(importedBastion?.hostChain, undefined);
-  assert.equal(importedSecond?.port, 2222);
-  assert.equal(importedSecond?.username, "bob");
-});
-
-test("CSV import creates an inline jump host when the hop is not in the file", () => {
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,ProxyJump",
-    "app.example.com,root,alice@bastion.example.com:2222",
-  ].join("\n"));
-  const target = imported.hosts.find((host) => host.hostname === "app.example.com");
-  const jump = imported.hosts.find((host) => host.hostname === "bastion.example.com");
-
-  assert.equal(imported.hosts.length, 2);
-  assert.equal(jump?.username, "alice");
-  assert.equal(jump?.port, 2222);
-  assert.equal(jump?.protocol, "ssh");
-  assert.deepEqual(target?.hostChain?.hostIds, jump ? [jump.id] : []);
-  assert.ok(imported.issues.some((issue) => issue.level === "warning" && /inline jump host/i.test(issue.message)));
-});
-
-test("CSV import binds a missing hop to an existing vault host by endpoint", () => {
-  const existing = chainHost("vault-jump", "Old bastion", "bastion.example.com", "alice", 2222);
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,ProxyJump",
-    "app.example.com,root,alice@bastion.example.com:2222",
-  ].join("\n"), { existingHosts: [existing] });
-
-  assert.equal(imported.hosts.length, 1);
-  assert.equal(imported.hosts[0]?.hostname, "app.example.com");
-  assert.deepEqual(imported.hosts[0]?.hostChain, { hostIds: [existing.id] });
-  assert.deepEqual(imported.issues, []);
-
-  const moved = applyVaultImportDestination(imported, { mode: "group", group: "Moved" });
-  assert.deepEqual(moved.hosts[0]?.hostChain, { hostIds: [existing.id] });
-});
-
-test("CSV import keeps an old file without a ProxyJump column unchanged", () => {
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,Password",
-    "legacy.example.com,root,secret",
-  ].join("\n"));
-
-  assert.equal(imported.hosts.length, 1);
-  assert.equal(imported.hosts[0]?.hostname, "legacy.example.com");
-  assert.equal(imported.hosts[0]?.username, "root");
-  assert.equal(imported.hosts[0]?.password, "secret");
-  assert.equal(imported.hosts[0]?.hostChain, undefined);
-  assert.deepEqual(imported.issues, []);
-});
-
-test("CSV import retargets a chain when the jump host is already in the vault", () => {
-  const bastion = chainHost("jump-1", "Bastion", "bastion.example.com", "alice");
-  bastion.group = "Prod";
-  const target = chainHost("app", "App", "app.example.com", "root");
-  target.group = "Prod";
-  target.hostChain = { hostIds: [bastion.id] };
-  const existing = chainHost("vault-jump", "Bastion", "bastion.example.com", "alice");
-  existing.group = "Prod";
-
-  const { csv } = exportHostsToCsvWithStats([bastion, target]);
-  const imported = importVaultHostsFromText("csv", csv, { existingHosts: [existing] });
-  const merged = applyVaultHostImport([existing], ["Prod"], imported);
-
-  assert.equal(merged.addedHosts.length, 1);
-  assert.equal(merged.addedHosts[0]?.hostname, "app.example.com");
-  assert.deepEqual(merged.addedHosts[0]?.hostChain, { hostIds: [existing.id] });
-  assert.equal(merged.hosts.some((host) => host.id !== existing.id && host.hostname === bastion.hostname), false);
-});
-
-test("CSV export materializes a jump chain inherited from group defaults", () => {
-  const bastion = chainHost("jump-1", "Bastion", "bastion.example.com", "alice");
-  const target = chainHost("app", "App", "app.example.com", "root");
-  target.group = "Corp";
-
-  const { csv } = exportHostsToCsvWithStats([bastion, target], {
-    groupConfigs: [{ path: "Corp", hostChain: { hostIds: [bastion.id] } }],
-  });
-
-  assert.equal(proxyJumpCell(csv, target.hostname), "alice@bastion.example.com");
-});
-
-test("CSV import warns and drops a circular ProxyJump chain", () => {
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,ProxyJump",
-    "a.example.com,root,b.example.com",
-    "b.example.com,root,a.example.com",
-  ].join("\n"));
-
-  assert.equal(imported.hosts.length, 2);
-  assert.equal(imported.hosts.every((host) => host.hostChain === undefined), true);
-  assert.ok(imported.issues.some((issue) => issue.level === "warning" && /circular/i.test(issue.message)));
-});
-
-test("CSV import drops inline hops created only for a rejected self-referential ProxyJump", () => {
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,ProxyJump",
-    "ok.example.com,root,kept-hop.example.com",
-    "app.example.com,root,\"new-hop.example.com,app.example.com\"",
-  ].join("\n"));
-
-  const hostnames = imported.hosts.map((host) => host.hostname).sort();
-  assert.deepEqual(hostnames, ["app.example.com", "kept-hop.example.com", "ok.example.com"]);
-  const app = imported.hosts.find((host) => host.hostname === "app.example.com");
-  const ok = imported.hosts.find((host) => host.hostname === "ok.example.com");
-  const kept = imported.hosts.find((host) => host.hostname === "kept-hop.example.com");
-  assert.equal(app?.hostChain, undefined);
-  assert.deepEqual(ok?.hostChain?.hostIds, kept ? [kept.id] : []);
-  assert.ok(imported.issues.some((issue) => issue.level === "warning" && /circular/i.test(issue.message)));
-});
-
-test("CSV import prefers a same-group existing hop over a cross-group imported match", () => {
-  const existing = chainHost("vault-jump", "Bastion", "bastion.example.com", "alice");
-  existing.group = "Prod";
-  const imported = importVaultHostsFromText("csv", [
-    "Groups,Hostname,Username,ProxyJump",
-    "Other,bastion.example.com,alice,",
-    "Prod,app.example.com,root,alice@bastion.example.com",
-  ].join("\n"), { existingHosts: [existing] });
-
-  const app = imported.hosts.find((host) => host.hostname === "app.example.com");
-  const importedBastion = imported.hosts.find((host) => host.hostname === "bastion.example.com");
-  assert.equal(importedBastion?.group, "Other");
-  assert.notEqual(importedBastion?.id, existing.id);
-  assert.deepEqual(app?.hostChain, { hostIds: [existing.id] });
-});
-
-test("CSV import prefers a same-group existing label hop over a cross-group imported label", () => {
-  const existing = chainHost("vault-jump", "Bastion", "vault-bastion.internal", "alice");
-  existing.group = "Prod";
-  const imported = importVaultHostsFromText("csv", [
-    "Groups,Label,Hostname,Username,ProxyJump",
-    "Other,Bastion,other-bastion.internal,alice,",
-    "Prod,App,app.example.com,root,alice@Bastion",
-  ].join("\n"), { existingHosts: [existing] });
-
-  const app = imported.hosts.find((host) => host.hostname === "app.example.com");
-  const importedBastion = imported.hosts.find((host) => host.hostname === "other-bastion.internal");
-  assert.equal(importedBastion?.group, "Other");
-  assert.equal(importedBastion?.label, "Bastion");
-  assert.notEqual(importedBastion?.id, existing.id);
-  assert.deepEqual(app?.hostChain, { hostIds: [existing.id] });
-});
-
-test("CSV import warns and ignores a ProxyJump value that is not a jump host", () => {
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,ProxyJump",
-    "app.example.com,root,not a hop",
-  ].join("\n"));
-
-  assert.equal(imported.hosts.length, 1);
-  assert.equal(imported.hosts[0]?.hostChain, undefined);
-  assert.ok(imported.issues.some((issue) => issue.level === "warning" && issue.message.includes("ProxyJump")));
-});
-
-test("CSV import rejects a ProxyJump chain that contains a malformed hop", () => {
-  const imported = importVaultHostsFromText("csv", [
-    "Hostname,Username,ProxyJump",
-    "app.example.com,root,\"bastion.example.com,not a hop\"",
-  ].join("\n"));
-
-  assert.deepEqual(imported.hosts.map((host) => host.hostname), ["app.example.com"]);
-  assert.equal(imported.hosts[0]?.hostChain, undefined);
-  assert.ok(imported.issues.some((issue) => (
-    issue.level === "warning" && issue.message.includes("not a hop")
-  )));
-});
-
 test("CSV import warns and ignores a malformed LocalShell value", () => {
  const csv = [
    "Groups,Label,Tags,Notes,Hostname/IP,Protocol,Port,Username,Password,KeyPath,Passphrase,Proxy,LocalShell",
@@ -2,8 +2,7 @@ import type { GroupConfig, Host, Identity, ProxyProfile } from '../models';
 import { applyGroupDefaults, resolveGroupDefaults } from '../groupConfig';
 import { isPluginHostProtocol } from '../pluginConnection';
 import { hasUnreadableProxyCredential, materializeHostProxyProfile, resolveProxyConfigAuth } from '../proxyProfiles';
-import { canServeAsSshJumpHost } from '../terminalProtocol';
-import { CsvLocalShellSpec, encodeCsvKeyPath, encodeCsvLocalShell, encodeCsvPassphrase, encodeCsvProxy, encodeCsvProxyJump } from './csvCredentialFields';
+import { CsvLocalShellSpec, encodeCsvKeyPath, encodeCsvLocalShell, encodeCsvPassphrase, encodeCsvProxy } from './csvCredentialFields';
 import { CSV_DIRECT_PROXY_VALUE, formatCsvProxy } from './csvProxy';

 const UTF8_BOM = "\uFEFF";
@@ -37,7 +36,7 @@ export const getVaultCsvTemplate = (
  opts: VaultCsvTemplateOptions = {},
 ): string => {
  const includeExampleRows = opts.includeExampleRows !== false;
-  const header = ["Groups", "Label", "Tags", "Notes", "Hostname/IP", "Protocol", "Port", "Username", "Password", "KeyPath", "Passphrase", "Proxy", "ProxyJump", "LocalShell"];
+  const header = ["Groups", "Label", "Tags", "Notes", "Hostname/IP", "Protocol", "Port", "Username", "Password", "KeyPath", "Passphrase", "Proxy", "LocalShell"];
  const rows: string[][] = [header];
  if (includeExampleRows) {
    rows.push(["Project/Dev", "Web Server (dev)", "dev,web", "Dev web tier", "192.168.1.10", "ssh", "22", "root", "", "~/.ssh/id_ed25519", "", "socks5://127.0.0.1:1080"]);
@@ -78,44 +77,8 @@ const getLocalShellSpec = (host: Host): CsvLocalShellSpec | null => (
    : null
 );

-const UNSAFE_PROXY_JUMP_USERNAME = /[\s,#@]/;
-const UNSAFE_PROXY_JUMP_HOSTNAME = /[\s,#@]/;
-const DEFAULT_PROXY_JUMP_PORT = 22;
-
-// OpenSSH ProxyJump: [user@]host[:port], repeated. Port 22 is omitted.
-// IPv6 is bracketed so the port separator stays unambiguous.
-const formatCsvProxyJumpHop = (host: Host): string | null => {
-  if (!canServeAsSshJumpHost(host)) return null;
-  const username = host.username?.trim() ?? "";
-  const hostname = host.hostname.trim().replace(/^\[(.*)\]$/u, "$1");
-  if (!hostname) return null;
-  if (username && UNSAFE_PROXY_JUMP_USERNAME.test(username)) return null;
-  if (UNSAFE_PROXY_JUMP_HOSTNAME.test(hostname)) return null;
-  const port = host.port ?? DEFAULT_PROXY_JUMP_PORT;
-  if (!Number.isInteger(port) || port < 1 || port > 65535) return null;
-  const hostPart = hostname.includes(":") ? `[${hostname}]` : hostname;
-  const withUser = username ? `${username}@${hostPart}` : hostPart;
-  return port === DEFAULT_PROXY_JUMP_PORT ? withUser : `${withUser}:${port}`;
-};
-
-// An empty cell means "no chain". A chain is omitted entirely when any hop
-// cannot be represented, so a shortened list is not written back as the truth.
-const formatCsvProxyJump = (host: Host, allHosts: readonly Host[]): string => {
-  const ids = host.hostChain?.hostIds ?? [];
-  if (ids.length === 0) return "";
-  const byId = new Map(allHosts.map((item) => [item.id, item]));
-  const parts: string[] = [];
-  for (const id of ids) {
-    const hop = byId.get(id);
-    const formatted = hop ? formatCsvProxyJumpHop(hop) : null;
-    if (!formatted) return "";
-    parts.push(formatted);
-  }
-  return parts.join(",");
-};
-
 const exportHostsToCsv = (hosts: Host[], options: VaultCsvExportOptions) => {
-  const header = ["Groups", "Label", "Tags", "Notes", "Hostname/IP", "Protocol", "Port", "Username", "Password", "KeyPath", "Passphrase", "Proxy", "ProxyJump", "LocalShell"];
+  const header = ["Groups", "Label", "Tags", "Notes", "Hostname/IP", "Protocol", "Port", "Username", "Password", "KeyPath", "Passphrase", "Proxy", "LocalShell"];
  const rows: string[][] = [header];
  let unreadableProxyCredentialCount = 0;

@@ -198,9 +161,6 @@ const exportHostsToCsv = (hosts: Host[], options: VaultCsvExportOptions) => {
      }
    }
    const localShellSpec = getLocalShellSpec(host);
-    // Group defaults are already on effectiveHost, same as Proxy, so a chain
-    // inherited from the group survives a file that has no group-config section.
-    const proxyJumpValue = formatCsvProxyJump(effectiveHost, exportableHosts);

    rows.push([
      host.group ?? "",
@@ -215,7 +175,6 @@ const exportHostsToCsv = (hosts: Host[], options: VaultCsvExportOptions) => {
      encodeCsvKeyPath(keyPath),
      encodeCsvPassphrase(passphrase),
      encodeCsvProxy(proxyValue),
-      encodeCsvProxyJump(proxyJumpValue),
      localShellSpec ? encodeCsvLocalShell(localShellSpec) : "",
    ]);
  }
@@ -224,10 +183,9 @@ const exportHostsToCsv = (hosts: Host[], options: VaultCsvExportOptions) => {
  const keyPathColIdx = header.indexOf("KeyPath");
  const passphraseColIdx = header.indexOf("Passphrase");
  const proxyColIdx = header.indexOf("Proxy");
-  const proxyJumpColIdx = header.indexOf("ProxyJump");
  const csv = rows.map((r, rowIdx) => r.map((c, i) => escapeCsv(
    c,
-    rowIdx > 0 && (i === passwordColIdx || i === keyPathColIdx || i === passphraseColIdx || i === proxyColIdx || i === proxyJumpColIdx),
+    rowIdx > 0 && (i === passwordColIdx || i === keyPathColIdx || i === passphraseColIdx || i === proxyColIdx),
  )).join(",")).join("\r\n") + "\r\n";
  return { csv, unreadableProxyCredentialCount };
 };
@@ -82,9 +82,6 @@ module.exports = {
        'lib/**/*.json',
        'skills/**/*',
        '!public/**/*',
-        // README screenshots live under docs/ and are not app resources.
-        // Keep them out of app.asar if the files globs ever become permissive.
-        '!docs/assets/readme/**/*',
        '!**/*.map',
        '!**/*.d.ts',
        '!**/*.d.mts',
@@ -63,10 +63,7 @@ function queryDirtyEditors(webContents, timeoutMs, options = {}) {
      // consume the listener slot and let the real reply fall through. A
      // missing/falsy sender is anomalous and treated as a wrong-window reply.
      if (evt?.sender !== webContents) return;
-      // "transfers": the user already declined the renderer's unfinished-
-      // transfer quit prompt. Still truthy, so existing callers keep quit
-      // cancelled; handleBeforeQuit uses it to skip the editor dialog.
-      settle(payload?.hasDirty === true ? (payload?.reason === "transfers" ? "transfers" : true) : false);
+      settle(payload?.hasDirty === true);
    }
    ipcMain.on("app:dirty-editors-result", onResult);

@@ -221,15 +221,3 @@ test("resolves false when no ipcMain can be resolved", async () => {
  assert.equal(await queryDirtyEditors(wc, 5000), false);
  assert.deepEqual(wc.sent, []);
 });
-
-test("carries a declined unfinished-transfer prompt as a truthy \"transfers\" result", async () => {
-  const ipcMain = makeIpcMain();
-  const wc = makeWebContents();
-  const promise = queryDirtyEditors(wc, 5000, { ipcMain });
-  ipcMain.emit("app:dirty-editors-result", { sender: wc }, { hasDirty: true, reason: "transfers" });
-  assert.equal(await promise, "transfers");
-  // A clean reply that names a reason is still clean.
-  const clean = queryDirtyEditors(wc, 5000, { ipcMain });
-  ipcMain.emit("app:dirty-editors-result", { sender: wc }, { hasDirty: false, reason: "transfers" });
-  assert.equal(await clean, false);
-});
@@ -34,11 +34,10 @@ function createProcessTree({ platform, listPosix, listWindows } = {}) {

 function defaultListPosix(ppid, { execFileFn = execFile } = {}) {
  return new Promise((resolve) => {
-    // Separate `-o col=` options. A single `-o pid=,ppid=,args=` spec is
-    // misread by procps-ng 3.3.x: the text after the first `=` becomes the
-    // header, so only pid is printed. The split form works on BSD (macOS),
-    // modern procps, and BusyBox. `args=` is the full command line.
-    execFileFn("ps", ["-A", "-o", "pid=", "-o", "ppid=", "-o", "args="], {
+    // `ps -A -o pid=,ppid=,args=` works on both BSD (macOS) and GNU (Linux).
+    // `args=` shows the full command line (not truncated like `comm=`).
+    // The trailing `=` on each column suppresses the header row.
+    execFileFn("ps", ["-A", "-o", "pid=,ppid=,args="], {
      timeout: POSIX_PROCESS_LIST_TIMEOUT_MS,
      maxBuffer: POSIX_PROCESS_LIST_MAX_BUFFER_BYTES,
      windowsHide: true,
@@ -101,7 +101,7 @@ test("default posix process listing bounds the child lifetime and captured outpu
    { pid: 2003, command: "python worker.py" },
  ]);
  assert.equal(invocation.command, "ps");
-  assert.deepEqual(invocation.args, ["-A", "-o", "pid=", "-o", "ppid=", "-o", "args="]);
+  assert.deepEqual(invocation.args, ["-A", "-o", "pid=,ppid=,args="]);
  assert.equal(invocation.options.timeout, POSIX_PROCESS_LIST_TIMEOUT_MS);
  assert.equal(invocation.options.maxBuffer, POSIX_PROCESS_LIST_MAX_BUFFER_BYTES);
  assert.equal(invocation.options.windowsHide, true);
@@ -120,12 +120,6 @@ test("openSftp clears its authentication timer when SSH becomes ready", () => {
  );
 });

-test("openSftp disables Nagle on direct and jump-hop SSH sockets", () => {
-  const source = readFileSync(require.resolve("./sftpBridge/openConnection.cjs"), "utf8");
-  assert.match(source, /sshClient\.once\('ready', \(\) => \{\s*clearAuthReadyTimer\(\);\s*cleanup\(\);[\s\S]{0,200}enableSshNoDelay\(sshClient\);/);
-  assert.match(source, /conn\.once\('ready', \(\) => \{[\s\S]{0,400}enableSshNoDelay\(conn\);/);
-});
-
 test("openSftp forwards target hostId to keyboard-interactive prompts", () => {
  const source = readFileSync(require.resolve("./sftpBridge/openConnection.cjs"), "utf8");
  assert.match(
@@ -9,7 +9,6 @@ const {
  terminateSshExecStream,
 } = require("../boundedSshExec.cjs");
 const { openBoundedSftpChannel } = require("../boundedSftpOpen.cjs");
-const { enableSshNoDelay } = require("../tcpNoDelay.cjs");
 const { openBoundedForwardOutCallback } = require("../boundedSshChannelOpen.cjs");
 const { remoteSoftwareRequiresSingleChannel } = require("../../../domain/singleChannelSshBanner.shared.cjs");

@@ -421,10 +420,6 @@ function createOpenConnectionApi(ctx) {
              if (settled) return;
              settled = true;
              clearAuthReadyTimer();
-              // SFTP RPCs are small request/response packets; with Nagle on, a
-              // second request behind an unacked one waits for the peer's
-              // delayed ACK (~40 ms per round trip on Linux, up to 200 ms on Windows).
-              enableSshNoDelay(conn);
              console.log(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: ${hopLabel} connected`);
              sendSftpProgress(sender, connId, hopLabel, 'connected');
              resolve();
@@ -1457,8 +1452,6 @@ function createOpenConnectionApi(ctx) {
          sshClient.once('ready', () => {
            clearAuthReadyTimer();
            cleanup();
-            // See jump-hop note above: SFTP is RPC-bound, so disable Nagle.
-            enableSshNoDelay(sshClient);
            if (remoteSoftwareRequiresSingleChannel(sshClient._remoteVer)) {
              peerSingleChannelSsh = true;
            }
@@ -105,7 +105,7 @@ function withRemoteWatchdog(command, timeoutMs) {
    // exec replaces the command-substitution shell: without it Bash may
    // report that intermediate PID instead of the watchdog subshell.
    `&& nc_self=$(exec sh -c 'echo $PPID' 2>/dev/null)`,
-    `&& nc_tree=$(ps -e -o pid= -o ppid= 2>/dev/null | awk -v root="$$" -v self="$nc_self" '${descendantTreeAwk}')`,
+    `&& nc_tree=$(ps -e -o pid=,ppid= 2>/dev/null | awk -v root="$$" -v self="$nc_self" '${descendantTreeAwk}')`,
    `&& kill -9 $nc_tree "$$" 2>/dev/null ) </dev/null >/dev/null 2>&1 & nc_watchdog_pid=$!`,
  ].join(' ');
  return [
@@ -115,7 +115,7 @@ function withRemoteWatchdog(command, timeoutMs) {
    // Reap the watchdog's pending `sleep` before killing the subshell: after
    // the subshell is SIGKILLed its children are reparented to init and a
    // PPID walk can no longer find them.
-    'nc_kids=$(ps -e -o pid= -o ppid= 2>/dev/null | awk -v root="$nc_watchdog_pid" -v self="-1" \'' +
+    'nc_kids=$(ps -e -o pid=,ppid= 2>/dev/null | awk -v root="$nc_watchdog_pid" -v self="-1" \'' +
      descendantTreeAwk +
      "')",
    'kill -9 $nc_kids "$nc_watchdog_pid" 2>/dev/null',
@@ -589,7 +589,7 @@ function createSessionOpsApi(ctx) {
    # different parent) of this exec session, so the sibling search misses it
    # entirely (#1123).
    find_login_shell() {
-      _shell=$(ps -e -o pid= -o ppid= -o tty= -o comm= 2>/dev/null | awk -v pp="$1" -v self="$SELF" '
+      _shell=$(ps -e -o pid=,ppid=,tty=,comm= 2>/dev/null | awk -v pp="$1" -v self="$SELF" '
        function isshell(c) { sub(/^.*\\//, "", c); sub(/^-/, "", c); return c ~ /^(ba|z|fi|k|da|a|c|tc)?sh$/ }
        $1 != self && $2 == pp && isshell($4) {
          if ($3 !~ /^\\?+$/) { print $1; found=1; exit }
@@ -638,7 +638,7 @@ function createSessionOpsApi(ctx) {
    # su'd / sudo'd shell instead of stopping at the login shell (#1065). Falls
    # back to the login shell when no foreground shell is found.
    find_active_shell() {
-      ps -e -o pid= -o ppid= -o stat= -o comm= 2>/dev/null | awk -v start="$1" '
+      ps -e -o pid=,ppid=,stat=,comm= 2>/dev/null | awk -v start="$1" '
        { pp[$1]=$2; st[$1]=$3; cm[$1]=$4; ord[NR]=$1 }
        function isshell(c) { sub(/^.*\\//, "", c); sub(/^-/, "", c); return c ~ /^(ba|z|fi|k|da|a|c|tc)?sh$/ }
        function depth(p,   d) { d=0; while (p != "" && d < 64) { if (p == start) return d; p=pp[p]; d++ } return -1 }
@@ -826,7 +826,7 @@ function createSessionOpsApi(ctx) {
        if (session.singleChannelSsh) return null;
        const script = `SELF=$$
    find_login_shell() {
-      ps -e -o pid= -o ppid= -o tty= -o comm= 2>/dev/null | awk -v pp="$1" -v self="$SELF" '
+      ps -e -o pid=,ppid=,tty=,comm= 2>/dev/null | awk -v pp="$1" -v self="$SELF" '
        $1 != self && $2 == pp && $4 ~ /^-?(ba|z|fi|k|da|a)?sh$/ {
          if ($3 != "?") { print $1; found=1; exit }
          if (any == "") any=$1
@@ -834,7 +834,7 @@ function createSessionOpsApi(ctx) {
        END { if (!found && any != "") print any }'
    }
    find_fg_leaf() {
-      ps -e -o pid= -o ppid= -o stat= -o comm= 2>/dev/null | awk -v start="$1" '
+      ps -e -o pid=,ppid=,stat=,comm= 2>/dev/null | awk -v start="$1" '
        { pp[$1]=$2; st[$1]=$3; ord[NR]=$1 }
        function depth(p,  d){ d=0; while(p!="" && d<64){ if(p==start) return d; p=pp[p]; d++ } return -1 }
        END { best=-1; bp=""; for(i=1;i<=NR;i++){ p=ord[i];
@@ -988,7 +988,7 @@ function createSessionOpsApi(ctx) {
        // so that relative paths like "." or "src" are resolved correctly.
        const needsCwdResolve = !dirPath.startsWith('/') && dirPath !== '~' && !dirPath.startsWith('~/');
        const cwdResolveCmd = needsCwdResolve
-          ? `_sc_p=$(ps --ppid $PPID -o pid= -o comm= 2>/dev/null | awk -v self=$$ '$1!=self && $2~/^(ba|z|fi|k|da)?sh$/{pid=$1}END{print pid}'); [ -z "$_sc_p" ] && _sc_p=$(ps -e -o pid= -o ppid= -o comm= 2>/dev/null | awk -v pp=$PPID -v self=$$ '$1!=self && $2==pp && $3~/^(ba|z|fi|k|da)?sh$/{pid=$1}END{print pid}'); [ -n "$_sc_p" ] && { _sc_d=$(readlink /proc/$_sc_p/cwd 2>/dev/null); [ -n "$_sc_d" ] && cd "$_sc_d" 2>/dev/null; }; `
+          ? `_sc_p=$(ps --ppid $PPID -o pid=,comm= 2>/dev/null | awk -v self=$$ '$1!=self && $2~/^(ba|z|fi|k|da)?sh$/{pid=$1}END{print pid}'); [ -z "$_sc_p" ] && _sc_p=$(ps -e -o pid=,ppid=,comm= 2>/dev/null | awk -v pp=$PPID -v self=$$ '$1!=self && $2==pp && $3~/^(ba|z|fi|k|da)?sh$/{pid=$1}END{print pid}'); [ -n "$_sc_p" ] && { _sc_d=$(readlink /proc/$_sc_p/cwd 2>/dev/null); [ -n "$_sc_d" ] && cd "$_sc_d" 2>/dev/null; }; `
          : '';
        const cmd = `${cwdResolveCmd}find ${pathExpr} -mindepth 1 -maxdepth 1 -exec sh -c '
          prefix="$1"
@@ -1210,7 +1210,7 @@ function createSessionOpsApi(ctx) {
        `swapused=$(echo "$swapraw" | awk '{for(i=1;i<=NF;i++){if($i=="used"&&$(i+1)=="="){v=$(i+2);m=1;if(v~/G/)m=1024;gsub(/[MmGg]/,"",v);su=v*m}};printf "%.0f",su+0}')`,
        `swapfree=$(echo "$swaptotal $swapused" | awk '{printf "%.0f",$1-$2}')`,
        // Top processes by memory%
-        `procs=$(ps -A -o pid= -o %mem= -o comm= 2>/dev/null | sort -k2 -rn | head -10 | awk '{gsub(/;/,"_",$3);printf "%s;%.1f;%s,",$1,$2,$3}' | sed 's/,$//')`,
+        `procs=$(ps -A -o pid=,%mem=,comm= 2>/dev/null | sort -k2 -rn | head -10 | awk '{gsub(/;/,"_",$3);printf "%s;%.1f;%s,",$1,$2,$3}' | sed 's/,$//')`,
        // Disk: -P keeps a stable six-column POSIX layout on macOS.
        `mounts=$(mount 2>/dev/null || true)`,
        `disks=$({ printf "%s\n" "$mounts"; printf "__NETCATTY_DF__\n"; df -kP 2>/dev/null; } | awk '$0=="__NETCATTY_DF__"{in_df=1;next} !in_df{if(index($1,"/dev/disk")==1&&(index($0,"(apfs,")||index($0,"(apfs)"))){key=$1;sub(/s[0-9].*$/,"",key);capacity[$1]="apfs:" key}next} $1=="Filesystem"{next} index($1,"/dev/")==1{m=$6;if(m=="/"||index(m,"/Volumes/")==1){t=$2/1048576;key=(($1 in capacity)?capacity[$1]:$1);if(key~/^apfs:/){u=($2-$4)/1048576;p=(t>0?int(u*100/t+0.5):0)}else{u=$3/1048576;p=$5;gsub(/%/,"",p)}printf "%s:%.6f:%.6f:%s:%s,",m,u,t,p,key}}' | sed 's/,$//')`,
@@ -333,9 +333,6 @@ test("cwd probe forces POSIX sh, captures sshd PPID, and keeps the watchdog", as
  assert.ok(command.includes(") </dev/null >/dev/null 2>&1 & nc_watchdog_pid=$!"));
  assert.ok(command.includes('kill -9 $nc_kids "$nc_watchdog_pid"'));
  assert.ok(command.includes('find_login_shell "${NC_SSHD_PPID:-$PPID}"'));
-  assert.match(command, /ps -e -o pid= -o ppid= -o tty= -o comm=/);
-  assert.match(command, /ps -e -o pid= -o ppid= -o stat= -o comm=/);
-  assert.equal(command.includes("pid=,"), false);
 });

 test("immediate parked reconnect does not guess cwd from an exiting shell", async () => {
@@ -8,7 +8,7 @@ const discoveryDisabledConnections = new WeakSet();

 function buildInteractiveShellPidCommand(quoteShellArg) {
  const script = `SELF=$$
-ps_output=$(ps -e -o pid= -o ppid= -o tty= -o comm= -o etimes= 2>/dev/null) || ps_output=$(ps -e -o pid= -o ppid= -o tty= -o comm= 2>/dev/null) || exit 69
+ps_output=$(ps -e -o pid=,ppid=,tty=,comm=,etimes= 2>/dev/null) || ps_output=$(ps -e -o pid=,ppid=,tty=,comm= 2>/dev/null) || exit 69
 {
  printf '%s\n' "$ps_output" | awk -v pp="$PPID" -v self="$SELF" '
    function isshell(c) { sub(/^.*\\//, "", c); sub(/^-/, "", c); return c ~ /^(ba|z|fi|k|da|a|c|tc)?sh$/ }
@@ -27,8 +27,6 @@ const { openBoundedSftpChannel } = require("./boundedSftpOpen.cjs");
 const {
  DOWNLOAD_TRANSFER_CONCURRENCY,
  FAST_DOWNLOAD_CHANNELS_PER_SESSION,
-  SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES,
-  SMALL_UPLOAD_SHARED_MAX_BYTES,
  SFTP_OPEN_TIMEOUT_MS,
  SFTP_REQUEST_TIMEOUT_MS,
  TRANSFER_CHUNK_SIZE,
@@ -652,77 +650,28 @@ async function resolveLocalResumeCheckpoint(filePath, claimedCheckpoint) {
  }
 }

-function isMissingRemoteStageError(error) {
-  const message = error?.message || String(error);
-  return error?.code === "ENOENT"
-    || error?.code === 2
-    || /no such file|ENOENT|not found|does not exist/i.test(message);
-}
-
-async function statRemoteStageSize(client, sftpId, filePath, encoding) {
-  if (isSftpChannelEnded(client?.sftp)) {
-    throw new Error("SFTP channel closed");
-  }
-  const stat = isScpModeClient(client)
-    ? await getScpBackendForClient(client).stat(filePath, { encoding })
-    : await client.stat(encodePathForSession(sftpId, filePath, encoding));
-  return Math.max(0, Number(stat?.size) || 0);
-}
-
 async function resolveRemoteResumeCheckpoint(client, sftpId, filePath, encoding, claimedCheckpoint) {
  const claimed = Math.max(0, Number(claimedCheckpoint) || 0);
  if (!claimed) return 0;
  try {
-    const size = await statRemoteStageSize(client, sftpId, filePath, encoding);
-    return Math.min(claimed, size);
+    const stat = isScpModeClient(client)
+      ? await getScpBackendForClient(client).stat(filePath, { encoding })
+      : await client.stat(encodePathForSession(sftpId, filePath, encoding));
+    return Math.min(claimed, Math.max(0, Number(stat?.size) || 0));
  } catch (error) {
+    const message = error?.message || String(error);
    // Missing remote .part after kill/crash — start over instead of blocking forever.
-    if (isMissingRemoteStageError(error)) return 0;
-    const message = error?.message || String(error);
+    if (
+      error?.code === "ENOENT"
+      || error?.code === 2
+      || /no such file|ENOENT|not found|does not exist/i.test(message)
+    ) {
+      return 0;
+    }
    throw new Error(`Resume safety check failed for remote temporary file: ${message}`);
  }
 }

-/**
- * A connection-drop retry has a checkpoint but no pause-time SHA-256. Keep that
- * checkpoint only when the staged .part on *this* connection covers it. A longer
- * in-flight tail is trimmed here; a shorter or missing .part restarts from 0
- * instead of appending onto bytes that do not match the checkpoint.
- */
-async function reconcileUnfingerprintedUploadCheckpoint(client, sftpId, filePath, encoding, claimedCheckpoint) {
-  const claimed = Math.max(0, Number(claimedCheckpoint) || 0);
-  if (!claimed) return 0;
-  let size;
-  try {
-    size = await statRemoteStageSize(client, sftpId, filePath, encoding);
-  } catch (error) {
-    if (isMissingRemoteStageError(error)) return 0;
-    const message = error?.message || String(error);
-    throw new Error(`Resume safety check failed for remote temporary file: ${message}`);
-  }
-  if (size < claimed) return 0;
-  if (size === claimed) return claimed;
-  // Longer .part is an in-flight tail, not a prefix we can append to. Trim it
-  // on this connection. If that fails, leave the stage untouched — do not fall
-  // back to an OPEN "w" that discards the matching prefix.
-  const stagedRemote = { sftpId, path: filePath, encoding };
-  if (isSftpChannelEnded(client?.sftp)) {
-    throw new Error("SFTP channel closed");
-  }
-  await truncateRemoteStagedToCheckpoint(client, stagedRemote, claimed);
-  let trimmed;
-  try {
-    trimmed = await statRemoteStageSize(client, sftpId, filePath, encoding);
-  } catch (error) {
-    const message = error?.message || String(error);
-    throw new Error(`Resume safety check failed for remote temporary file: ${message}`);
-  }
-  if (trimmed !== claimed) {
-    throw new Error("Resume safety check failed for remote temporary file: could not trim the staged upload to the checkpoint");
-  }
-  return claimed;
-}
-
 async function hashReadable(readable, options = {}) {
  const { signal, onProgress } = options;
  const inactivityTimeoutMs = Number(options.inactivityTimeoutMs) > 0
@@ -861,17 +810,9 @@ function raceLocalStreamOpenAgainstAbort(openPromise, signal) {

 // Local source reads go through asarSafeFs so real files named *.asar are not
 // mistaken for asar archives by Electron's fs wrapper (#3450).
-// Test seam: replace the local prefix stream for one byte length so a retry
-// re-hash can be held open until Cancel aborts it.
-let localPrefixHashStreamOverrideForTests = null;
-
 async function hashLocalPrefix(filePath, bytes, options) {
  if (!Number.isFinite(bytes) || bytes < 0) return Promise.resolve(null);
  if (bytes === 0) return Promise.resolve(EMPTY_SHA256_HEX);
-  const override = localPrefixHashStreamOverrideForTests;
-  if (override && Number(override.bytes) === bytes) {
-    return hashReadable(override.create(options), options);
-  }
  const stream = await raceLocalStreamOpenAgainstAbort(
    openLocalReadStream(filePath, { start: 0, end: bytes - 1 }),
    options?.signal,
@@ -1002,10 +943,6 @@ function isLegacyFullSourceFingerprint(fingerprint) {
  return /^sha256:[a-f0-9]{64}$/i.test(String(fingerprint || ""));
 }

-function hasFullSourceFingerprint(fingerprint) {
-  return /^sha256:(?:p\d+:)?[a-f0-9]{64}$/i.test(String(fingerprint || ""));
-}
-
 async function computeSourceFingerprint(
  { sourceType, sourcePath, sourceSftpId, sourceEncoding, prefixBytes },
  options = {},
@@ -1588,128 +1525,6 @@ function logTransferDiag(transfer, event, extra = {}) {
 // Shared references
 let sftpClients = null;

-// Incremental SHA-256 of the bytes actually acknowledged and written to the
-// remote .part, in contiguous order. Retry re-reads the local prefix and
-// resumes only when that digest and the source size still match the offset
-// being resumed. SHA-256 cannot rewind, so a checkpoint trimmed below the
-// covered offset drops the digest and restarts at 0. Kept in memory because
-// Retry is same-process — a relaunch with no fingerprint already restarts at 0.
-// Entries stay only while that task can still resume from the checkpoint.
-const localUploadAcknowledgedPrefix = new Map();
-const UPLOAD_PREFIX_SESSION_LOSS = /SFTP (channel closed|session lost)|ECONNRESET|EPIPE|Not connected|No response from server|Keepalive timeout|connection (lost|closed|reset)/i;
-
-function forgetLocalUploadAcknowledgedPrefix(transferId) {
-  if (transferId) localUploadAcknowledgedPrefix.delete(String(transferId));
-}
-
-function resetLocalUploadAcknowledgedPrefix(transferId, size) {
-  if (!transferId) return;
-  const safeSize = Number(size);
-  localUploadAcknowledgedPrefix.set(String(transferId), {
-    size: Number.isFinite(safeSize) && safeSize >= 0 ? safeSize : null,
-    hash: crypto.createHash("sha256"),
-    offset: 0,
-    savedHash: null,
-    digest: null,
-    digestOffset: 0,
-    broken: false,
-  });
-}
-
-function noteAcknowledgedUploadBytes(transferId, position, bytes) {
-  const entry = transferId ? localUploadAcknowledgedPrefix.get(String(transferId)) : null;
-  if (!entry || entry.broken || !Buffer.isBuffer(bytes) || bytes.length === 0) return;
-  const at = Math.floor(Number(position) || 0);
-  if (at !== entry.offset) {
-    entry.broken = true;
-    entry.digest = null;
-    entry.savedHash = null;
-    return;
-  }
-  entry.hash.update(bytes);
-  entry.offset += bytes.length;
-  // Snapshot without finalizing the running hash. digestOffset is the only
-  // checkpoint this digest can resume.
-  entry.savedHash = entry.hash.copy();
-  entry.digest = entry.savedHash.copy().digest("hex");
-  entry.digestOffset = entry.offset;
-}
-
-function localUploadAcknowledgedOffset(transferId) {
-  const entry = transferId ? localUploadAcknowledgedPrefix.get(String(transferId)) : null;
-  if (!entry || entry.broken || !entry.digest || !(entry.digestOffset > 0)) return 0;
-  return entry.digestOffset;
-}
-
-function localUploadPrefixFailureKeepsCheckpoint(transferId, message) {
-  return localUploadAcknowledgedOffset(transferId) > 0
-    && UPLOAD_PREFIX_SESSION_LOSS.test(String(message || ""));
-}
-
-async function localUploadAcknowledgedPrefixMatches(transferId, sourcePath, checkpoint, sourceSize, options) {
-  const entry = transferId ? localUploadAcknowledgedPrefix.get(String(transferId)) : null;
-  const offset = Math.floor(Number(checkpoint) || 0);
-  if (!entry || entry.broken || !entry.digest || !entry.savedHash) return false;
-  if (!(offset > 0) || entry.digestOffset !== offset) return false;
-  if (!Number.isFinite(Number(sourceSize)) || Number(sourceSize) !== entry.size) return false;
-  try {
-    const digest = await hashLocalPrefix(sourcePath, offset, { signal: options?.signal });
-    return digest === entry.digest;
-  } catch (error) {
-    if (
-      options?.signal?.aborted
-      || error?.code === "ABORT_ERR"
-      || error?.message === "Transfer cancelled"
-    ) {
-      throw error;
-    }
-    return false;
-  }
-}
-
-function rewindLocalUploadAcknowledgedPrefix(transferId) {
-  const entry = transferId ? localUploadAcknowledgedPrefix.get(String(transferId)) : null;
-  if (!entry || entry.broken || !entry.savedHash) return;
-  entry.hash = entry.savedHash.copy();
-  entry.offset = entry.digestOffset;
-}
-
-// Keep the running hash aligned with the offset about to be written. A smaller
-// checkpoint than digestOffset cannot reuse this digest.
-function adoptAcknowledgedPrefixOffset(transferId, checkpoint, sourceSize) {
-  const entry = transferId ? localUploadAcknowledgedPrefix.get(String(transferId)) : null;
-  const offset = Math.max(0, Math.floor(Number(checkpoint) || 0));
-  if (!entry) return offset;
-  const size = Number(sourceSize);
-  const sizeOk = !Number.isFinite(entry.size) || !Number.isFinite(size) || entry.size === size;
-  if (
-    offset > 0
-    && sizeOk
-    && !entry.broken
-    && entry.digest
-    && entry.savedHash
-    && entry.digestOffset === offset
-  ) {
-    entry.hash = entry.savedHash.copy();
-    entry.offset = entry.digestOffset;
-    return offset;
-  }
-  resetLocalUploadAcknowledgedPrefix(transferId, Number.isFinite(size) ? size : entry.size);
-  return 0;
-}
-
-async function currentLocalUploadSourceSize(transfer, sourcePath) {
-  const cachedSize = Number(transfer?.sourceSoftIdentity?.size);
-  if (Number.isFinite(cachedSize) && cachedSize >= 0) return cachedSize;
-  try {
-    const st = await statLocal(sourcePath);
-    if (!Number.isFinite(st?.size) || st.size < 0) return null;
-    return Number(st.size);
-  } catch {
-    return null;
-  }
-}
-
 // Active transfers storage
 const activeTransfers = new Map();
 const admittedTransferQueue = [];
@@ -2025,32 +1840,6 @@ function markDisposableUploadChannel(channel) {
  return channel;
 }

-// Mutable only for tests that exercise slot/isolated behaviour with tiny files.
-let smallDownloadSlotExemptBytes = SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES;
-
-/**
- * ssh2 never answers (or fails) a request issued on an SFTP channel that has
- * already ended: cleanupRequests ran at close, later requests are dropped.
- * ssh2-sftp-client also keeps its stale `sftp` after a TCP reset, so its
- * stat()/open() hang forever. Check before issuing any recovery request.
- */
-function isSftpChannelEnded(sftp) {
-  return Boolean(sftp) && sftp.readable === false;
-}
-
-/**
- * Shared-channel failure that main used to recover by opening a fresh SFTP
- * subsystem. File status (ENOENT / EACCES) is the same on any channel.
- */
-function isStaleOrClosedSharedChannelError(error, sftp) {
-  if (!error || typeof error !== "object") return false;
-  const code = error.code;
-  if (code === "ENOENT" || code === "EACCES") return false;
-  if (isSftpChannelEnded(sftp) || sftp?.destroyed === true) return true;
-  if (error.sftpChannelClosed || isSftpChannelLossError(error)) return true;
-  return /channel closed/i.test(String(error.message || ""));
-}
-
 async function openIsolatedSftpChannel(client, signal = null) {
  // The dedicated one-channel login already holds its only session channel.
  // Opening another SFTP subsystem drops that login, so stay on the browse channel.
@@ -2089,7 +1878,6 @@ async function truncateRemoteStagedToCheckpoint(client, stagedRemote, checkpoint
  const checkpoint = Math.max(0, Number(checkpointBytes) || 0);
  if (!client || !stagedRemote?.path) return;
  if (isScpModeClient(client)) return;
-  if (isSftpChannelEnded(client.sftp)) return;
  try {
    const encoded = encodePathForSession(
      stagedRemote.sftpId,
@@ -2099,27 +1887,20 @@ async function truncateRemoteStagedToCheckpoint(client, stagedRemote, checkpoint
    const stat = await client.stat(encoded);
    const size = Math.max(0, Number(stat?.size) || 0);
    if (size <= checkpoint) return;
-    // ssh2's SFTP has no ftruncate, and ssh2-sftp-client has no truncate.
-    // SETSTAT { size } is what actually shortens a remote file. client.sftp is
-    // the raw ssh2 channel, same as the mode/mtime setstat calls above.
-    const sftp = client.sftp;
-    if (sftp && typeof sftp.setstat === "function") {
-      await new Promise((resolve, reject) => {
-        sftp.setstat(encoded, { size: checkpoint }, (err) => (err ? reject(err) : resolve()));
-      });
+    // Prefer native truncate when available (ssh2-sftp-client).
+    if (typeof client.truncate === "function") {
+      await client.truncate(encoded, checkpoint);
      return;
    }
-    if (sftp && typeof sftp.fsetstat === "function" && typeof sftp.open === "function") {
+    if (typeof client.sftp?.ftruncate === "function" && typeof client.sftp?.open === "function") {
      await new Promise((resolve, reject) => {
-        sftp.open(encoded, "r+", (openErr, handle) => {
+        client.sftp.open(encoded, "r+", (openErr, handle) => {
          if (openErr) return reject(openErr);
-          sftp.fsetstat(handle, { size: checkpoint }, (statErr) => {
-            const finish = (err) => (err ? reject(err) : resolve());
-            if (typeof sftp.close === "function") {
-              sftp.close(handle, () => finish(statErr));
-              return;
-            }
-            finish(statErr);
+          client.sftp.ftruncate(handle, checkpoint, (truncErr) => {
+            client.sftp.close(handle, () => {
+              if (truncErr) reject(truncErr);
+              else resolve();
+            });
          });
        });
      });
@@ -2492,9 +2273,6 @@ async function prepareUploadFallbackCheckpoint(transfer, client, fileSize, sendP
    let stagedSize = Number.POSITIVE_INFINITY;
    try {
      const staged = transfer.stagedRemote;
-      if (isSftpChannelEnded((staged.client || client)?.sftp)) {
-        throw new Error("SFTP channel closed");
-      }
      const encoded = encodePathForSession(staged.sftpId, staged.path, staged.encoding);
      stagedSize = Number((await (staged.client || client).stat(encoded))?.size);
    } catch { /* missing staged file — restart */ }
@@ -2698,11 +2476,7 @@ async function uploadFile(

  // Prefer an isolated SFTP channel so cancellation cannot kill the browse session.
  let isolated = null;
-  const preferSharedChannel = Number(fileSize) > 0
-    && Number(fileSize) <= SMALL_UPLOAD_SHARED_MAX_BYTES
-    && typeof sftp?.open === "function"
-    && typeof sftp?.write === "function";
-  if (!client.__netcattySudoMode && !preferSharedChannel) {
+  if (!client.__netcattySudoMode) {
    try {
      isolated = markDisposableUploadChannel(
        await openIsolatedSftpChannel(client, transfer?.signal),
@@ -2746,10 +2520,6 @@ async function uploadFile(
      // uploadFileConcurrent ends the isolated channel itself.
      isolated = null;
      if (transfer.cancelled) throw err;
-      // Whole connection lost (reset/VPN drop/sshd killed): the browse channel
-      // is dead too, and every fallback request on it would hang. Fail now so
-      // the task shows an error and can be resumed/retried after reconnect.
-      if (isSftpChannelEnded(sftp)) throw err;
      if (err?.noTransferFallback || transfer.noTransferFallback) {
        if (err && typeof err === "object" && transfer.noTransferFallback) {
          err.noTransferFallback = true;
@@ -2774,7 +2544,7 @@ async function uploadFile(
    }
  }

-  if (!isolated && !client.__netcattySudoMode && !preferSharedChannel) {
+  if (!isolated && !client.__netcattySudoMode) {
    try {
      isolated = markDisposableUploadChannel(
        await openIsolatedSftpChannel(client, transfer?.signal),
@@ -3379,21 +3149,9 @@ function openSftpHandleForTransfer(sftp, filePath, flags, transfer, options = {}
    // the OPEN callback unanswered, so the upload stayed active with no error.
    sftp.on?.("end", onOpenChannelClosed);
    sftp.on?.("close", onOpenChannelClosed);
-    if (sftp.readable === false) {
-      // The channel already ended (TCP reset, sshd/sftp-server killed, VPN
-      // drop). ssh2 never answers a request issued after close, and the
-      // end/close events above will not fire again, so OPEN — read or write —
-      // would wait forever and leave the task frozen at "Transferring".
-      // No OPEN was sent. A write must release the path gate the same way a
-      // pre-OPEN failure does: the generic write-error path keeps a generated
-      // stage gate held, and a resumable upload skips the bounded fastPut
-      // wait, so every later strategy on this path would wait forever.
-      if (isWriteOpen) {
-        settle(reject, sftpChannelClosedError(null, sftp));
-        completeSharedWriteDrain();
-        releasePathGate();
-        return;
-      }
+    if (!isWriteOpen && sftp.readable === false) {
+      // A failed isolated download may fall back after the browse channel's
+      // end event already fired. ssh2 never answers a new OPEN on that channel.
      onOpenChannelClosed();
      return;
    }
@@ -4885,31 +4643,16 @@ async function runPausableConcurrentRanges({
          active += 1;

          void copyRange(position, length)
-            .then((written) => {
+            .then(() => {
              // After force-settle, abandoned ranges must not publish progress
              // or advance checkpoints into the caller's truncate/fallback window.
              if (settled) return;
              transferred += length;
-              // Uploads return the bytes just acknowledged so the prefix digest
-              // follows the contiguous checkpoint. Downloads store the end offset.
-              if (Buffer.isBuffer(written)) {
-                completedRanges.set(position, { end: position + length, bytes: written });
-              } else {
-                completedRanges.set(position, position + length);
-              }
+              completedRanges.set(position, position + length);
              while (completedRanges.has(contiguousCheckpoint)) {
-                const next = completedRanges.get(contiguousCheckpoint);
+                const nextCheckpoint = completedRanges.get(contiguousCheckpoint);
                completedRanges.delete(contiguousCheckpoint);
-                if (typeof next === "number") {
-                  contiguousCheckpoint = next;
-                } else {
-                  noteAcknowledgedUploadBytes(
-                    transfer.transferId,
-                    contiguousCheckpoint,
-                    next.bytes,
-                  );
-                  contiguousCheckpoint = next.end;
-                }
+                contiguousCheckpoint = nextCheckpoint;
              }
              publishContiguousCheckpoint(false);
            })
@@ -5005,16 +4748,6 @@ async function uploadFileConcurrent(
  // Mutable: may shrink after path-gate wait if a stale truncating OPEN wiped
  // the stage while we were waiting (Codex P2 on 294b7a4b).
  let checkpoint = Math.max(0, Math.min(transfer.checkpointBytes || 0, fileSize));
-  // A fallback strategy may have moved the resume offset. The prefix digest
-  // only matches its own offset; anything else restarts at 0 before OPEN
-  // chooses r+ vs w. Fingerprinted resumes do not consult this digest.
-  if (!transfer.sourceFingerprint) {
-    const alignedPrefix = adoptAcknowledgedPrefixOffset(transfer.transferId, checkpoint, fileSize);
-    if (alignedPrefix !== checkpoint) {
-      checkpoint = alignedPrefix;
-      transfer.checkpointBytes = alignedPrefix;
-    }
-  }
  let channelError = null;
  const onChannelError = (error) => {
    channelError = channelError || error;
@@ -5076,9 +4809,6 @@ async function uploadFileConcurrent(
            transfer.staleOpenTruncatedStage = false;
            checkpoint = 0;
            transfer.checkpointBytes = 0;
-            if (localUploadAcknowledgedPrefix.has(String(transfer.transferId))) {
-              resetLocalUploadAcknowledgedPrefix(transfer.transferId, fileSize);
-            }
            try {
              sendProgress(0, fileSize, { force: true, checkpointBytes: 0 });
            } catch { /* best-effort */ }
@@ -5102,18 +4832,6 @@ async function uploadFileConcurrent(
              size = Number(st?.size);
            }
            if (Number.isFinite(size) && size >= 0 && size < checkpoint) {
-              const prefix = localUploadAcknowledgedPrefix.get(String(transfer.transferId));
-              // The prefix digest cannot be rewound to a shorter stage.
-              // Fingerprinted resumes keep the durable shorter offset.
-              if (!transfer.sourceFingerprint && prefix && prefix.digestOffset > size) {
-                checkpoint = 0;
-                transfer.checkpointBytes = 0;
-                resetLocalUploadAcknowledgedPrefix(transfer.transferId, fileSize);
-                try {
-                  sendProgress(0, fileSize, { force: true, checkpointBytes: 0 });
-                } catch { /* best-effort */ }
-                return;
-              }
              checkpoint = size;
              transfer.checkpointBytes = size;
              try {
@@ -5137,13 +4855,11 @@ async function uploadFileConcurrent(
        concurrency: UPLOAD_TRANSFER_CONCURRENCY,
        copyRange: async (position, length) => {
          // Size-based resume: read the source range at `position` and WRITE it.
-          // The returned buffer is the prefix-digest input, hashed only after
-          // the write is acknowledged and only in contiguous order.
+          // No per-chunk content digest (FileZilla / WinSCP style).
          const buffer = Buffer.allocUnsafe(length);
          await readLocalRange(localHandle, buffer, position, length);
          if (transfer.cancelled) throw new Error("Transfer cancelled");
          await writeSftpRange(sftp, remoteHandle, buffer, position, length);
-          return buffer;
        },
        sendProgress,
        abortChannel,
@@ -5538,139 +5254,123 @@ async function downloadFile(

  // One session-wide fast-path slot for isolated + shared READ fanout (#1507).
  // Wait (cancelable) instead of degrading to serial createReadStream (#2719).
-  // Small files (one fanout window) skip the slot and the isolated channel and
-  // read on the shared browse channel, so folder downloads run in parallel.
-  // A stale or closed shared channel retries once on a fresh subsystem.
-  // ENOENT and EACCES do not: a new channel would get the same file status.
-  const smallDownload = Number(fileSize) > 0
-    && Number(fileSize) <= smallDownloadSlotExemptBytes
-    && typeof sftp.open === "function"
-    && typeof sftp.read === "function";
-  // Prefer an isolated SFTP channel so cancellation cannot kill the browse session.
-  // True when this attempt finished the download (success or unhealthy close
-  // after a complete body). False when the caller should try the next strategy.
-  async function tryIsolatedDownload() {
-    const fastSftp = await acquireIsolatedDownloadChannel(client, transfer);
-    if (transfer.cancelled) {
-      if (fastSftp) {
-        releaseIsolatedDownloadChannel(client, fastSftp, { dispose: true });
-      }
-      throw new Error("Transfer cancelled");
-    }
-
-    if (fastSftp && (transfer.resumable || typeof fastSftp.fastGet === "function")) {
-      try {
-        if (transfer.resumable) {
-          transfer.downloadStrategy = "concurrent-isolated";
-          logTransferDiag(transfer, "strategy", {
-            strategy: "concurrent-isolated",
-            fields: {
-              chunk: formatDiagBytes(TRANSFER_CHUNK_SIZE),
-              concurrency: DOWNLOAD_TRANSFER_CONCURRENCY,
-            },
-          });
-          await downloadFileResumableFast(
-            remotePath,
-            localPath,
-            fastSftp,
-            fileSize,
-            transfer,
-            sendProgress,
-          );
-          await finishSuccessfulDownload();
-          releaseIsolatedDownloadChannel(client, fastSftp);
-          return true;
-        }
-        transfer.downloadStrategy = "fastGet-isolated";
-        logTransferDiag(transfer, "strategy", { strategy: "fastGet-isolated" });
-        await new Promise((resolve, reject) => {
-          let settled = false;
-          let onFastSftpError = null;
-          const onFastSftpClose = () => finish(new Error("SFTP channel closed during download"));
-          const finish = (err) => {
-            if (settled) return;
-            settled = true;
-            if (transfer.abort === abortFastTransfer) {
-              transfer.abort = null;
-            }
-            if (onFastSftpError) {
-              try { fastSftp.removeListener("error", onFastSftpError); } catch { }
-              onFastSftpError = null;
-            }
-            fastSftp.removeListener("end", onFastSftpClose);
-            fastSftp.removeListener("close", onFastSftpClose);
-            releaseIsolatedDownloadChannel(client, fastSftp, {
-              dispose: !!err || transfer.cancelled,
-            });
-
-            if (transfer.cancelled) reject(new Error("Transfer cancelled"));
-            else if (err) reject(err);
-            else resolve();
-          };
-          const abortFastTransfer = () => {
-            if (settled) return;
-            transfer.cancelled = true;
-            finish(new Error("Transfer cancelled"));
-          };
-          transfer.abort = abortFastTransfer;
-          onFastSftpError = (err) => finish(err);
-          fastSftp.once("error", onFastSftpError);
-          fastSftp.once("end", onFastSftpClose);
-          fastSftp.once("close", onFastSftpClose);
-
-          if (transfer.cancelled) {
-            finish(new Error("Transfer cancelled"));
-            return;
-          }
-
-          fastSftp.fastGet(remotePath, localPath, {
-            chunkSize: TRANSFER_CHUNK_SIZE,
-            concurrency: DOWNLOAD_TRANSFER_CONCURRENCY,
-            step: (transferred, _chunk, total) => {
-              if (transfer.cancelled) return;
-              sendProgress(transferred, total || fileSize);
-            },
-          }, finish);
-        });
-        return true;
-      } catch (err) {
-        // Always release before rethrowing cancel — otherwise the channel stays
-        // in pool.busy and the per-session fast-download budget is exhausted.
-        releaseIsolatedDownloadChannel(client, fastSftp, { dispose: true });
-        if (transfer.cancelled) throw err;
-        if (err?.noTransferFallback) throw err;
-        if (err?.completedWithUnhealthyChannel) {
-          await finishSuccessfulDownload();
-          return true;
-        }
-        // Concurrent ranges may leave sparse tails past the contiguous
-        // checkpoint; truncate before trying the next pipelined strategy.
-        rememberPipelineError(err);
-        await prepareDownloadFallbackCheckpoint();
-        console.warn(
-          "[transferBridge] isolated download failed, trying next pipelined strategy:",
-          err?.message || String(err),
-        );
-      }
-    } else if (fastSftp) {
-      // Acquired a channel but cannot use fast path — return it to the pool.
-      releaseIsolatedDownloadChannel(client, fastSftp);
-    }
-    return false;
-  }
-
  let holdSessionSlot = false;
  try {
-    if (!smallDownload) {
-      await acquireSessionFastDownloadSlot(client, transfer);
-      holdSessionSlot = true;
-    }
-    if (!client.__netcattySudoMode && !smallDownload) {
-      if (await tryIsolatedDownload()) return;
+    await acquireSessionFastDownloadSlot(client, transfer);
+    holdSessionSlot = true;
+
+    // Prefer an isolated SFTP channel so cancellation cannot kill the browse session.
+    if (!client.__netcattySudoMode) {
+      const fastSftp = await acquireIsolatedDownloadChannel(client, transfer);
+      if (transfer.cancelled) {
+        if (fastSftp) {
+          releaseIsolatedDownloadChannel(client, fastSftp, { dispose: true });
+        }
+        throw new Error("Transfer cancelled");
+      }
+
+      if (fastSftp && (transfer.resumable || typeof fastSftp.fastGet === "function")) {
+        try {
+          if (transfer.resumable) {
+            transfer.downloadStrategy = "concurrent-isolated";
+            logTransferDiag(transfer, "strategy", {
+              strategy: "concurrent-isolated",
+              fields: {
+                chunk: formatDiagBytes(TRANSFER_CHUNK_SIZE),
+                concurrency: DOWNLOAD_TRANSFER_CONCURRENCY,
+              },
+            });
+            await downloadFileResumableFast(
+              remotePath,
+              localPath,
+              fastSftp,
+              fileSize,
+              transfer,
+              sendProgress,
+            );
+            await finishSuccessfulDownload();
+            releaseIsolatedDownloadChannel(client, fastSftp);
+            return;
+          }
+          transfer.downloadStrategy = "fastGet-isolated";
+          logTransferDiag(transfer, "strategy", { strategy: "fastGet-isolated" });
+          await new Promise((resolve, reject) => {
+            let settled = false;
+            let onFastSftpError = null;
+            const onFastSftpClose = () => finish(new Error("SFTP channel closed during download"));
+            const finish = (err) => {
+              if (settled) return;
+              settled = true;
+              if (transfer.abort === abortFastTransfer) {
+                transfer.abort = null;
+              }
+              if (onFastSftpError) {
+                try { fastSftp.removeListener("error", onFastSftpError); } catch { }
+                onFastSftpError = null;
+              }
+              fastSftp.removeListener("end", onFastSftpClose);
+              fastSftp.removeListener("close", onFastSftpClose);
+              releaseIsolatedDownloadChannel(client, fastSftp, {
+                dispose: !!err || transfer.cancelled,
+              });
+
+              if (transfer.cancelled) reject(new Error("Transfer cancelled"));
+              else if (err) reject(err);
+              else resolve();
+            };
+            const abortFastTransfer = () => {
+              if (settled) return;
+              transfer.cancelled = true;
+              finish(new Error("Transfer cancelled"));
+            };
+            transfer.abort = abortFastTransfer;
+            onFastSftpError = (err) => finish(err);
+            fastSftp.once("error", onFastSftpError);
+            fastSftp.once("end", onFastSftpClose);
+            fastSftp.once("close", onFastSftpClose);
+
+            if (transfer.cancelled) {
+              finish(new Error("Transfer cancelled"));
+              return;
+            }
+
+            fastSftp.fastGet(remotePath, localPath, {
+              chunkSize: TRANSFER_CHUNK_SIZE,
+              concurrency: DOWNLOAD_TRANSFER_CONCURRENCY,
+              step: (transferred, _chunk, total) => {
+                if (transfer.cancelled) return;
+                sendProgress(transferred, total || fileSize);
+              },
+            }, finish);
+          });
+          return;
+        } catch (err) {
+          // Always release before rethrowing cancel — otherwise the channel stays
+          // in pool.busy and the per-session fast-download budget is exhausted.
+          releaseIsolatedDownloadChannel(client, fastSftp, { dispose: true });
+          if (transfer.cancelled) throw err;
+          if (err?.noTransferFallback) throw err;
+          if (err?.completedWithUnhealthyChannel) {
+            await finishSuccessfulDownload();
+            return;
+          }
+          // Concurrent ranges may leave sparse tails past the contiguous
+          // checkpoint; truncate before trying the next pipelined strategy.
+          rememberPipelineError(err);
+          await prepareDownloadFallbackCheckpoint();
+          console.warn(
+            "[transferBridge] isolated download failed, trying next pipelined strategy:",
+            err?.message || String(err),
+          );
+        }
+      } else if (fastSftp) {
+        // Acquired a channel but cannot use fast path — return it to the pool.
+        releaseIsolatedDownloadChannel(client, fastSftp);
+      }
    }

    // Pipelined READs on the shared browse session — covers sudo (no isolated
-    // channel), small files, and non-sudo isolated miss/failure.
+    // channel) and non-sudo isolated miss/failure. Same session slot already held.
    if (typeof sftp.open === "function" && typeof sftp.read === "function") {
      try {
        transfer.downloadStrategy = "concurrent-shared";
@@ -5696,31 +5396,13 @@ async function downloadFile(
        return;
      } catch (err) {
        if (transfer.cancelled) throw err;
-        // noTransferFallback means "do not keep using this dead channel".
-        // A stale shared browse channel can still recover on one fresh
-        // subsystem, which is the path main took before the small-file skip.
-        const retryOnFreshChannel = smallDownload
-          && !client.__netcattySudoMode
-          && isStaleOrClosedSharedChannelError(err, sftp);
-        if (err?.noTransferFallback && !retryOnFreshChannel) throw err;
+        if (err?.noTransferFallback) throw err;
        rememberPipelineError(err);
        await prepareDownloadFallbackCheckpoint();
-        if (!retryOnFreshChannel) {
-          console.warn(
-            "[transferBridge] concurrent shared download failed (no serial stream fallback):",
-            err?.message || String(err),
-          );
-        } else {
-          console.warn(
-            "[transferBridge] shared download channel failed, trying a fresh SFTP channel:",
-            err?.message || String(err),
-          );
-          if (!holdSessionSlot) {
-            await acquireSessionFastDownloadSlot(client, transfer);
-            holdSessionSlot = true;
-          }
-          if (await tryIsolatedDownload()) return;
-        }
+        console.warn(
+          "[transferBridge] concurrent shared download failed (no serial stream fallback):",
+          err?.message || String(err),
+        );
      }
    } else if (!lastPipelineError) {
      lastPipelineError = new Error(
@@ -6386,7 +6068,6 @@ async function startTransferNow(event, payload, onProgress) {
      directoryEntryIdentity: transfer.directoryEntryIdentity,
    });
    cleanupTransfer();
-    forgetLocalUploadAcknowledgedPrefix(transferId);
  };

  const sendError = (error) => {
@@ -6412,9 +6093,6 @@ async function startTransferNow(event, payload, onProgress) {
    }
    cleanupTransfer();
    const cancelled = /cancel/i.test(message);
-    if (cancelled || !localUploadPrefixFailureKeepsCheckpoint(transferId, message)) {
-      forgetLocalUploadAcknowledgedPrefix(transferId);
-    }
    if (cancelled) {
      sender.send("netcatty:transfer:cancelled", { transferId, error: message });
      broadcastGlobalTransferEvent({
@@ -6501,45 +6179,6 @@ async function startTransferNow(event, payload, onProgress) {
    const hasSavedCheckpoint = transfer.checkpointBytes > 0
      || transfer.downloadCheckpointBytes > 0
      || transfer.uploadCheckpointBytes > 0;
-    // A dropped upload never pauses, so it has a checkpoint and no full-file
-    // SHA-256. Keep that checkpoint only when the local bytes in [0, offset)
-    // still hash to the digest of the bytes acknowledged on the .part, and
-    // the source size is unchanged. The new connection stats and trims the
-    // same .part below. A rewrite, a smaller offset than the digest covers,
-    // a missing baseline, meta: identities, and every other direction restart.
-    const unfingerprintedLocalUpload = sourceType === "local"
-      && targetType === "sftp"
-      && !transfer.sourceFingerprint;
-    const localSourceSize = unfingerprintedLocalUpload
-      ? await currentLocalUploadSourceSize(transfer, sourcePath)
-      : null;
-    const claimedUnfingerprintedUpload = unfingerprintedLocalUpload
-      && transfer.checkpointBytes > 0;
-    let localSourceUnchanged = false;
-    if (claimedUnfingerprintedUpload) {
-      // Start the read before the preflight race so Cancel aborts the same
-      // signal hashLocalPrefix is watching. The extra catch keeps a late
-      // hash rejection from surfacing once the race has already settled.
-      const verifyPromise = localUploadAcknowledgedPrefixMatches(
-        transferId,
-        sourcePath,
-        transfer.checkpointBytes,
-        localSourceSize,
-        { signal: transfer.signal },
-      );
-      void verifyPromise.catch(() => {});
-      localSourceUnchanged = await runCancelablePreflight(() => verifyPromise);
-    }
-    // Start a fresh digest when this attempt will write from byte 0. A matching
-    // resume rewinds the running hash to the stored offset so later chunks append.
-    if (unfingerprintedLocalUpload) {
-      if (localSourceUnchanged) {
-        rewindLocalUploadAcknowledgedPrefix(transferId);
-      } else {
-        resetLocalUploadAcknowledgedPrefix(transferId, localSourceSize);
-      }
-    }
-    const verifyUploadStageOnNewConnection = localSourceUnchanged;
    if (
      transfer.resumable
      && hasSavedCheckpoint
@@ -6547,7 +6186,6 @@ async function startTransferNow(event, payload, onProgress) {
        !transfer.sourceFingerprint
        || String(transfer.sourceFingerprint).startsWith("meta:")
      )
-      && !verifyUploadStageOnNewConnection
    ) {
      // Older builds persisted only size/mtime/sparse samples. They cannot prove
      // that the untransferred suffix still belongs to the same source. Restart
@@ -6610,49 +6248,20 @@ async function startTransferNow(event, payload, onProgress) {
          transfer.stagedRemote = usesStage
            ? { client, sftpId: targetSftpId, path: uploadTargetPath, encoding: targetEncoding }
            : null;
-          let claimedCheckpoint = transfer.checkpointBytes;
-          if (
-            usesStage
-            && transfer.resumable
-            && claimedCheckpoint > 0
-            && !hasFullSourceFingerprint(transfer.sourceFingerprint)
-          ) {
-            claimedCheckpoint = await runCancelablePreflight(() => (
-              reconcileUnfingerprintedUploadCheckpoint(
-                client,
-                targetSftpId,
-                uploadTargetPath,
-                targetEncoding,
-                claimedCheckpoint,
-              )
-            ));
-          }
          transfer.checkpointBytes = usesStage && transfer.resumable
            ? await runCancelablePreflight(() => resolveRemoteResumeCheckpoint(
                  client,
                  targetSftpId,
                  uploadTargetPath,
                  targetEncoding,
-                  claimedCheckpoint,
+                  transfer.checkpointBytes,
                ))
            : 0;
-          if (unfingerprintedLocalUpload) {
-            const aligned = adoptAcknowledgedPrefixOffset(
-              transferId,
-              transfer.checkpointBytes,
-              localSourceSize ?? fileSize,
-            );
-            if (aligned !== transfer.checkpointBytes) {
-              transfer.checkpointBytes = aligned;
-              transfer.downloadCheckpointBytes = 0;
-              transfer.uploadCheckpointBytes = 0;
-            }
-          }
          sendProgress(transfer.checkpointBytes, fileSize, { force: true });
-          // The .part size is reconciled above. Compare the local prefix to the
-          // digest of bytes already acknowledged — do not hash the remote prefix.
-          // Hashing both ends blocked large-file resume for seconds-to-minutes
-          // with no bytes moving.
+          // Resume is size-based only (WinSCP/FileZilla): the durable .part size
+          // is the checkpoint. Do not re-hash [0, checkpoint) on both ends —
+          // that blocked large-file resume for seconds-to-minutes with no bytes
+          // moving.
          await uploadFile(
            sourcePath,
            encodedUploadPath,
@@ -7185,25 +6794,6 @@ async function startTransferNow(event, payload, onProgress) {

    return { transferId, totalBytes: fileSize };
  } catch (err) {
-    const failureMessage = err?.message || String(err);
-    if (
-      sourceType === "local"
-      && targetType === "sftp"
-      && !transfer.sourceFingerprint
-      && !transfer.cancelled
-      && !/superseded/i.test(failureMessage)
-      && failureMessage !== "Transfer cancelled"
-    ) {
-      const covered = localUploadAcknowledgedOffset(transferId);
-      if (covered > 0) {
-        try {
-          sendProgress(covered, Number(transfer.totalBytes) || covered, {
-            force: true,
-            checkpointBytes: covered,
-          });
-        } catch { /* best-effort */ }
-      }
-    }
    logTransferDiag(transfer, transfer.cancelled ? "cancelled" : "error", {
      transferred: transfer.diagLastTransferred,
      total: transfer.diagTotalBytes,
@@ -7259,7 +6849,6 @@ async function startTransferNow(event, payload, onProgress) {
        } catch { }
      }
      cleanupTransfer();
-      forgetLocalUploadAcknowledgedPrefix(transferId);
      sender.send("netcatty:transfer:cancelled", { transferId });
      broadcastGlobalTransferEvent({ type: "cancelled", transferId, endedAt: Date.now() });
    } else {
@@ -7853,9 +7442,6 @@ async function prioritizeTransfer(_event, payload) {
 async function cleanupTransferArtifacts(_event, payload) {
  const transferId = payload?.transferId;
  if (!transferId) return { success: false };
-  // Dismiss, clear, and fresh-id retry all come through here. The digest is
-  // only useful while this task id can still resume.
-  forgetLocalUploadAcknowledgedPrefix(transferId);
  const stageNames = new Set([
    path.basename(payload.targetPath || "transfer"),
    path.basename(payload.sourcePath || "transfer"),
@@ -8264,13 +7850,4 @@ module.exports = {
  _assertLocalDownloadMatchesRemotePrefixForTests: assertLocalDownloadMatchesRemotePrefix,
  _hashRemotePrefixForTests: hashRemotePrefix,
  _remoteOpenPathMatchesStagedForTests: remoteOpenPathMatchesStaged,
-  _setSmallDownloadSlotExemptBytesForTests: (bytes) => {
-    smallDownloadSlotExemptBytes = bytes == null ? SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES : Math.max(0, Number(bytes) || 0);
-  },
-  _setLocalPrefixHashStreamOverrideForTests: (override) => {
-    localPrefixHashStreamOverrideForTests = override;
-  },
-  _hasLocalUploadAcknowledgedPrefixForTests: (transferId) => (
-    localUploadAcknowledgedPrefix.has(String(transferId))
-  ),
 };
@@ -28,24 +28,8 @@ const SFTP_REQUEST_TIMEOUT_MS = 30_000;
 // channel pool caps - they must never fall back to serial body streams.
 const FAST_DOWNLOAD_CHANNELS_PER_SESSION = 1;

-// A file that fits in one READ fanout window (64 x 32KB) cannot hog the
-// session the way a multi-GB download can, so it skips the per-session slot
-// above and reads on the shared browse channel. Without this, folder downloads
-// of small files ran strictly one file at a time regardless of the transfer
-// concurrency setting.
-const SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES = DOWNLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE;
-
-// A file that fits in one fanout window finishes in a couple of round trips.
-// Opening a dedicated sftp-server channel for it (channel open + subsystem +
-// SFTP init) costs more than the body itself on WAN links and spawns one
-// remote process per file in folder uploads, so small files use the shared
-// session's pipelined WRITE path instead.
-const SMALL_UPLOAD_SHARED_MAX_BYTES = UPLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE;
-
 module.exports = {
  DOWNLOAD_TRANSFER_CONCURRENCY,
-  SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES,
-  SMALL_UPLOAD_SHARED_MAX_BYTES,
  FAST_DOWNLOAD_CHANNELS_PER_SESSION,
  SFTP_OPEN_TIMEOUT_MS,
  SFTP_REQUEST_TIMEOUT_MS,
@@ -3,9 +3,7 @@ const assert = require("node:assert/strict");

 const {
  FAST_DOWNLOAD_CHANNELS_PER_SESSION,
-  SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES,
  DOWNLOAD_TRANSFER_CONCURRENCY,
-  SMALL_UPLOAD_SHARED_MAX_BYTES,
  UPLOAD_TRANSFER_CONCURRENCY,
  TRANSFER_CHUNK_SIZE,
 } = require("./transferLimits.cjs");
@@ -20,18 +18,8 @@ test("SFTP transfer limits preserve upload safety and the pre-regression downloa
  // #2449 / Electerm-class: upload window is 2MB (64 × 32KB). Raising only
  // concurrency keeps the safe packet size while matching ssh2/Electerm defaults.
  assert.equal(UPLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE, 2 * 1024 * 1024);
-  // One fanout window. Files at or under this size upload on the shared browse
-  // channel instead of opening a dedicated sftp-server per file.
-  assert.equal(SMALL_UPLOAD_SHARED_MAX_BYTES, UPLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE);
  // #2030 reduced the shared chunk size from 512KB to 32KB. Downloads need
  // enough parallel reads to preserve the 2MB in-flight window that existed
  // after #1533, otherwise high-latency proxy paths collapse to KB/s speeds.
  assert.equal(DOWNLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE, 2 * 1024 * 1024);
 });
-
-test("small downloads (one READ window) are exempt from the per-session fast slot", () => {
-  // Big files still serialize on FAST_DOWNLOAD_CHANNELS_PER_SESSION (#1507).
-  assert.equal(FAST_DOWNLOAD_CHANNELS_PER_SESSION, 1);
-  assert.equal(SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES, DOWNLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE);
-  assert.equal(SMALL_DOWNLOAD_SLOT_EXEMPT_BYTES, 2 * 1024 * 1024);
-});
@@ -155,7 +155,6 @@ async function handleBeforeQuit({
  setQuitConfirmed,
  commitQuit,
  cancelPendingUpdateInstall,
-  dialog: injectedDialog,
 }) {
  if (quitConfirmed) return { committed: false, skipped: "quit-confirmed" };
  if (quitGuardChannelBusy) {
@@ -208,7 +207,6 @@ async function handleBeforeQuit({
        queryDirtyEditors(win.webContents, timeoutMs, { ipcMain }).then((hasDirty) => ({
          win,
          hasDirty: Boolean(hasDirty),
-          transfersOnly: hasDirty === "transfers",
        })),
      ),
    );
@@ -251,24 +249,18 @@ async function handleBeforeQuit({
    // App Lock overlay sits above renderer toasts (z-index). When the app is
    // already locked, focusing the dirty window does not make the unsaved
    // warning visible — surface a native dialog above the lock screen (Codex P2).
-    // Skip it when every refusal came from the renderer's unfinished-transfer
-    // prompt: the user already answered, and this synchronous box would block
-    // the main process (and every running transfer) behind a wrong message.
-    const dirtyEditorsRefused = dirtyResults.some((result) => result.hasDirty && !result.transfersOnly);
-    if (dirtyEditorsRefused) {
-      try {
-        const dialog = injectedDialog || require("electron").dialog;
-        dialog.showMessageBoxSync({
-          type: "warning",
-          buttons: ["OK"],
-          defaultId: 0,
-          message: "Unsaved changes",
-          detail:
-            "One or more editors have unsaved changes. If the app is locked, unlock it, then save or discard before quitting.",
-        });
-      } catch {
-        // ignore missing dialog in tests
-      }
+    try {
+      const { dialog } = require("electron");
+      dialog.showMessageBoxSync({
+        type: "warning",
+        buttons: ["OK"],
+        defaultId: 0,
+        message: "Unsaved changes",
+        detail:
+          "One or more editors have unsaved changes. If the app is locked, unlock it, then save or discard before quitting.",
+      });
+    } catch {
+      // ignore missing dialog in tests
    }

    if (windowManager?.isQuittingForUpdate?.()) {
@@ -444,35 +444,3 @@ test("handleBeforeQuit focuses only dirty windows when multiple renderers reply"
    "focus",
  ]);
 });
-
-test("handleBeforeQuit does not raise the blocking editor dialog when only the transfer quit prompt was declined", async () => {
-  const run = async (dirtyValue) => {
-    const calls = [];
-    const win = { isDestroyed: () => false, webContents: { isDestroyed: () => false, isCrashed: () => false, id: 1 } };
-    const result = await handleBeforeQuit({
-      event: { preventDefault() { calls.push("preventDefault"); } },
-      mainWindows: [win],
-      queryDirtyEditors: async () => dirtyValue,
-      appLockController: { setLocked(reason) { calls.push(`lock:${reason}`); } },
-      windowManager: { showAndFocusMainWindow() { calls.push("showAndFocus"); } },
-      app: { quit() { calls.push("app.quit"); } },
-      ipcMain: {},
-      quitConfirmed: false,
-      quitGuardChannelBusy: false,
-      timeoutMs: 10,
-      setQuitGuardChannelBusy() {},
-      setQuitConfirmed(value) { calls.push(`quitConfirmed:${value}`); },
-      dialog: { showMessageBoxSync() { calls.push("dialog"); return 0; } },
-    });
-    return { calls, result };
-  };
-
-  const declined = await run("transfers");
-  assert.equal(declined.result.skipped, "dirty", "the declined prompt still cancels quit");
-  assert.ok(!declined.calls.includes("dialog"), "no synchronous native dialog after the user already answered");
-  assert.ok(!declined.calls.includes("app.quit"));
-
-  const dirty = await run(true);
-  assert.equal(dirty.result.skipped, "dirty");
-  assert.deepEqual(dirty.calls.filter((c) => c === "dialog"), ["dialog"], "real unsaved editors keep the dialog");
-});
@@ -1462,7 +1462,7 @@ function createPreloadApi(ctx) {
    return () => ipcRenderer.removeListener("app:query-dirty-editors", handler);
  },
  // Renderer reports the dirty-check result back to the main process.
-  reportDirtyEditorsResult: (hasDirty, reason) => ipcRenderer.send("app:dirty-editors-result", { hasDirty, reason }),
+  reportDirtyEditorsResult: (hasDirty) => ipcRenderer.send("app:dirty-editors-result", { hasDirty }),
  
  // Port Forwarding API
  startPortForward: async (options) => {
@@ -680,13 +680,21 @@ html[data-theme-transition] *::after {
  box-shadow: 0 4px 12px hsl(var(--foreground) / 0.06);
 }

-/* Unread activity remains visible until acknowledged without keeping the
-   compositor animating after terminal output stops. The 8px status dot plus
-   its 2px gap and 1px outline fits inside the existing 20px tab content line.
-   Keep the dot's connection-status color; the extra outline marks unread output. */
+@keyframes session-activity-breathe {
+  0%,
+  100% {
+    transform: scale(1);
+    opacity: 1;
+  }
+
+  50% {
+    transform: scale(1.1);
+    opacity: 0.18;
+  }
+}
+
 .session-activity-dot {
-  outline: 1px solid color-mix(in srgb, var(--top-tabs-fg, hsl(var(--foreground))) 75%, transparent);
-  outline-offset: 2px;
+  animation: session-activity-breathe 1.4s ease-in-out infinite;
 }

@keyframes coding-cli-icon-pulse {
@@ -51,7 +51,6 @@ import {
  importVaultHostsFromText,
  mergeVaultImportIssues,
  resolveVaultImportKeyPassphraseConflicts,
-  toVaultImportExistingHostRef,
  VAULT_IMPORT_FORMATS,
  type VaultImportFormat,
 } from '../../domain/vaultImport';
@@ -947,10 +946,7 @@ export async function handleVaultAgentOp(
        ? params.fileName.trim()
        : undefined;

-      const importResult = importVaultHostsFromText(resolvedFormat, text, {
-        fileName,
-        existingHosts: deps.getHosts().map(toVaultImportExistingHostRef),
-      });
+      const importResult = importVaultHostsFromText(resolvedFormat, text, { fileName });
      const previewHosts = importResult.hosts.map((host) => sanitizeHostForAgent(host));
      const merged = applyVaultHostImport(
        deps.getHosts(),
@@ -3,7 +3,6 @@ import {
  buildVaultHostMergeKey,
  importVaultHostsFromText,
  mergeVaultImportIssues,
-  type VaultImportExistingHostRef,
  type VaultImportFormat,
  type VaultImportIssue,
  type VaultImportResult,
@@ -25,7 +24,6 @@ interface ImportVaultHostFilesOptions {
  relativePaths?: string[];
  encoding?: VaultImportFileEncoding;
  masterPassword?: string;
-  existingHosts?: readonly VaultImportExistingHostRef[];
  onProgress?: (progress: VaultImportBatchProgress) => void;
 }

@@ -80,7 +78,6 @@ export async function importVaultHostFiles({
  relativePaths,
  encoding,
  masterPassword,
-  existingHosts,
  onProgress,
 }: ImportVaultHostFilesOptions): Promise<VaultImportResult> {
  const sourceFiles = files.map((file, index) => ({
@@ -107,7 +104,6 @@ export async function importVaultHostFiles({
      const result = importVaultHostsFromText(format, text, {
        fileName: file.name,
        masterPassword,
-        existingHosts,
      });
      const group = format === "securecrt"
        ? secureCrtGroupFromFile(file, relativePath)
@@ -1,5 +1,4 @@
 import type {
-  VaultImportExistingHostRef,
  VaultImportFormat,
  VaultImportResult,
 } from "../../domain/vaultImport";
@@ -23,7 +22,6 @@ export type VaultImportWorkerRequest = {
  relativePaths: string[];
  encoding: VaultImportFileEncoding | undefined;
  masterPassword?: string;
-  existingHosts?: VaultImportExistingHostRef[];
 };

 export type VaultImportWorkerResponse =
@@ -46,7 +44,6 @@ interface ImportVaultHostsInWorkerOptions {
  files: File[];
  encoding?: VaultImportFileEncoding;
  masterPassword?: string;
-  existingHosts?: readonly VaultImportExistingHostRef[];
  signal?: AbortSignal;
  createWorker?: () => VaultImportWorkerLike;
  onProgress?: (progress: VaultImportWorkerProgress) => void;
@@ -63,7 +60,6 @@ export function importVaultHostsInWorker({
  files,
  encoding,
  masterPassword,
-  existingHosts,
  signal,
  createWorker = createVaultImportWorker,
  onProgress,
@@ -118,7 +114,6 @@ export function importVaultHostsInWorker({
      relativePaths: files.map((file) => file.webkitRelativePath),
      encoding,
      ...(masterPassword ? { masterPassword } : {}),
-      ...(existingHosts && existingHosts.length > 0 ? { existingHosts: [...existingHosts] } : {}),
    });
  });
 }
@@ -23,7 +23,6 @@ workerScope.addEventListener("message", async (event: MessageEvent<VaultImportWo
      relativePaths: event.data.relativePaths,
      encoding: event.data.encoding,
      masterPassword: event.data.masterPassword,
-      existingHosts: event.data.existingHosts,
      onProgress: ({ completedFiles, totalFiles, fileName }) => {
        post({
          type: "progress",
@@ -1 +1,2 @@
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+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>AlmaLinux</title><path d="M23.994 15.133c.079 1.061-.668 1.927-1.69 2.005a1.8 1.8 0 0 1-1.928-1.651c-.078-1.062.63-1.849 1.691-1.967c1.023-.078 1.849.59 1.927 1.613m-12.623 4.955c-.944 0-1.73.786-1.73 1.809c0 1.14.747 1.848 1.887 1.848c.904-.04 1.691-.865 1.691-1.809c0-.983-.904-1.848-1.848-1.848m1.061-9.675c-.039-.865-.078-1.73.08-2.556c.156-.944.314-1.887.904-2.674c.707-.983 1.809-.944 2.399.118c.314.511.432 1.062.471 1.652c0 .354.158.432.472.393c.944-.157 1.888-.157 2.792.197c.118.039.236.118.394 0c.314-.276.393-1.652.196-2.006c-.354-.63-.904-.55-1.455-.55c-.629.039-1.18-.158-1.612-.67c-.393-.471-.511-1.06-.59-1.65c-.04-.276-.079-.512-.315-.709c-.55-.55-1.809-.432-2.477.118c-2.556 2.045-2.989 5.467-1.534 8.18c.04.118.118.236.275.157m7.984 3.658c.354-.511.865-.747 1.415-.983a.97.97 0 0 0 .59-.472c.354-.669-.078-1.81-.747-2.36c-2.595-2.006-5.938-1.612-8.18.433c-.118.078-.157.196-.078.314c.786-.236 1.612-.472 2.477-.51c.905-.08 1.848-.158 2.753.235c1.14.472 1.337 1.534.472 2.36c-.393.393-.905.668-1.455.825c-.315.08-.354.236-.236.551c.354.865.59 1.77.472 2.753c-.04.157-.079.275.078.393c.354.236 1.691 0 1.967-.275c.511-.472.314-1.023.196-1.534c-.157-.63-.078-1.219.276-1.73m-7.197-2.045c-.118-.079-.197-.118-.315 0c.472.708.905 1.455 1.259 2.241c.314.866.668 1.73.55 2.714c-.118 1.18-1.1 1.69-2.123 1.101c-.511-.275-.905-.669-1.22-1.14c-.196-.276-.393-.276-.629-.08c-.747.63-1.533 1.102-2.516 1.26c-.158 0-.315 0-.394.157c-.118.393.472 1.612.826 1.809c.59.354 1.062 0 1.534-.276c.55-.314 1.101-.432 1.73-.236c.59.197.983.63 1.337 1.102c.158.196.315.353.63.432c.747.197 1.77-.59 2.084-1.376c1.18-3.028-.157-6.135-2.753-7.708m-2.556 2.438c.472-.669.826-1.416.983-2.202c-.157-.04-.197.04-.315.078c-.904.944-1.848 1.849-3.067 2.478c-.472.236-.983.433-1.534.433c-.865 0-1.376-.551-1.298-1.416a2.92 2.92 0 0 1 .787-1.849c.236-.275.236-.432-.04-.668c-.786-.55-1.494-1.22-1.848-2.124c-.078-.275-.275-.275-.51-.157a4 4 0 0 0-.434.236c-1.022.63-1.14 1.416-.275 2.28c.63.63.944 1.338.708 2.203c-.118.433-.354.747-.63 1.101a.95.95 0 0 0-.235.787c.079.747.826 1.494 1.73 1.573c2.517.236 4.562-.63 5.978-2.753m-4.68-5.152c1.376 1.18 3.067 1.455 4.837 1.377c.157 0 .315 0 .354-.118c.04-.197-.157-.197-.275-.236c-.826-.354-1.691-.63-2.438-1.14S6.848 8.25 6.534 7.266c-.236-.747.078-1.415.825-1.651c.669-.236 1.337-.236 1.967 0c.393.157.55.078.629-.354c.118-.747.354-1.455.826-2.085c.55-.786.55-.865-.354-1.376c-.04 0-.04-.04-.079-.04c-.865-.471-1.534-.196-1.848.709c-.472 1.376-1.377 1.887-2.832 1.612a4 4 0 0 0-.472-.079c-.747.118-1.18.55-1.297 1.14c-.158 1.81.786 3.107 2.084 4.17m-2.32 3.658c-.079-.944-1.023-1.652-2.045-1.534c-.905.079-1.691 1.022-1.613 1.966c.08.983 1.023 1.77 1.967 1.652c1.14-.079 1.73-1.18 1.69-2.084zm15.18-8.298c.943-.079 1.73-.983 1.651-1.927c-.078-.983-1.022-1.77-2.005-1.691c-1.023.079-1.73.983-1.652 1.966s.983 1.73 2.006 1.652m-12.27-.826c1.062-.157 1.77-1.023 1.652-2.045C8.107.897 7.163.149 6.18.267c-1.062.118-1.691.944-1.573 2.085c.118.865 1.061 1.612 1.966 1.494"/>
+</svg>
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12.076.066 8.883 3.28H3.348v5.434L0 12.01l3.349 3.298v5.39h5.374l3.285 3.236 3.285-3.236h5.43v-5.374L24 12.026l-3.232-3.252V3.321H15.31zm0 .749 2.49 2.506h-1.69v6.441l-.8.805-.81-.815V3.28H9.627zm-8.2 2.991h4.483L6.485 5.692l4.253 4.279v.654H9.94L5.674 6.423l-1.798 1.77zm5.227 0h1.635v5.415l-3.509-3.53zm4.302.043h1.687l1.83 1.842-3.517 3.539zm2.431 0h4.404v4.394l-1.83-1.842-4.241 4.267h-.764v-.69l4.261-4.287zm2.574 3.3 1.83 1.843v1.676h-5.327zm-12.735.013 3.515 3.462H3.876v-1.69zM3.348 9.454v1.697h6.377l.871.858-.782.77H3.35v1.786L.753 12.01zm17.42.068 2.488 2.503-2.533 2.55v-1.796h-6.41l-.75-.754.825-.83h6.38zm-9.502.978.81.815.186-.188.614-.618v.686h.768l-.825.83.75.754h-.719v.808l-.842-.83-.741.73v-.707h-.7l.781-.77-.188-.186-.682-.672h.788zm-7.39 2.807h5.402l-3.603 3.55-1.798-1.772zm6.154 0h.708v.7l-4.404 4.338 1.852 1.824h-4.31v-4.342l1.798 1.77zm3.348 0h.715l4.317 4.343.186-.187 1.599-1.61v4.316h-4.366l1.853-1.825-.188-.185-4.116-4.054zm1.46 0h5.357v1.798l-1.785 1.796zm-2.83.191.842.829v6.37h1.691l-2.532 2.495-2.533-2.495h1.79V14.23zm-1.27 1.251v5.42H8.939l-1.852-1.823zm2.64.097 3.552 3.499-1.853 1.825h-1.7z"/></svg>
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>CentOS</title><path d="M12.076.066L8.883 3.28H3.348v5.434L0 12.01l3.349 3.298v5.39h5.374l3.285 3.236 3.285-3.236h5.43v-5.374L24 12.026l-3.232-3.252V3.321H15.31zm0 .749l2.49 2.506h-1.69v6.441l-.8.805-.81-.815V3.28H9.627zm-8.2 2.991h4.483L6.485 5.692l4.253 4.279v.654H9.94L5.674 6.423l-1.798 1.77zm5.227 0h1.635v5.415l-3.509-3.53zm4.302.043h1.687l1.83 1.842-3.517 3.539zm2.431 0h4.404v4.394l-1.83-1.842-4.241 4.267h-.764v-.69l4.261-4.287zm2.574 3.3l1.83 1.843v1.676h-5.327zm-12.735.013l3.515 3.462H3.876v-1.69zM3.348 9.454v1.697h6.377l.871.858-.782.77H3.35v1.786L.753 12.01zm17.42.068l2.488 2.503-2.533 2.55v-1.796h-6.41l-.75-.754.825-.83h6.38zm-9.502.978l.81.815.186-.188.614-.618v.686h.768l-.825.83.75.754h-.719v.808l-.842-.83-.741.73v-.707h-.7l.781-.77-.188-.186-.682-.672h.788zm-7.39 2.807h5.402l-3.603 3.55-1.798-1.772zm6.154 0h.708v.7l-4.404 4.338 1.852 1.824h-4.31v-4.342l1.798 1.77zm3.348 0h.715l4.317 4.343.186-.187 1.599-1.61v4.316h-4.366l1.853-1.825-.188-.185-4.116-4.054zm1.46 0h5.357v1.798l-1.785 1.796zm-2.83.191l.842.829v6.37h1.691l-2.532 2.495-2.533-2.495h1.79V14.23zm-1.27 1.251v5.42H8.939l-1.852-1.823zm2.64.097l3.552 3.499-1.853 1.825h-1.7z"/></svg>
@@ -203,22 +203,6 @@ test("build.files trims release-only dependency payloads", () => {
  }
 });

-test("build.files keeps README screenshot WebP out of the package", () => {
-  assert.ok(
-    config.files.includes("!docs/assets/readme/**/*"),
-    "README WebP screenshots must stay out of app.asar",
-  );
-  const { FileMatcher } = require("app-builder-lib/out/fileMatcher");
-  const root = path.resolve(__dirname, "..");
-  const matcher = new FileMatcher(root, path.join(root, "release"), (value) => value);
-  for (const pattern of config.files) matcher.addPattern(pattern);
-  const filter = matcher.createFilter();
-  const stat = { isDirectory: () => false };
-  assert.equal(filter(path.join(root, "docs/assets/readme/overview.webp"), stat), false);
-  assert.equal(filter(path.join(root, "electron/main.cjs"), stat), true);
-  assert.equal(filter(path.join(root, "public/icon.png"), stat), false);
-});
-
 test("build.files excludes Vite-bundled renderer-only packages", () => {
  const files = config.files;
  for (const glob of [
@@ -1,26 +0,0 @@
-"use strict";
-/* global __dirname */
-const assert = require("node:assert/strict");
-const fs = require("node:fs");
-const path = require("node:path");
-const test = require("node:test");
-
-const root = path.resolve(__dirname, "..");
-const css = fs.readFileSync(path.join(root, "index.css"), "utf8");
-const tabs = fs.readFileSync(path.join(root, "components/top-tabs/TopTabItems.tsx"), "utf8");
-
-test("unread terminal activity has a static theme-aware outline, not an endless animation", () => {
-  const rule = css.match(/\.session-activity-dot\s*\{([^}]+)\}/)?.[1];
-  assert.ok(rule, "keep a distinct unread activity style");
-  assert.match(rule, /outline:\s*1px solid color-mix\(in srgb, var\(--top-tabs-fg, hsl\(var\(--foreground\)\)\) 75%, transparent\)/);
-  assert.match(rule, /outline-offset:\s*2px/);
-  assert.doesNotMatch(rule, /(?:animation|transition|background|color|transform)\s*:/);
-  assert.doesNotMatch(css, /session-activity-breathe/);
-});
-
-test("static unread styling keeps session status hues and conditional tab/workspace consumers", () => {
-  assert.match(tabs, /hasActivity && "session-activity-dot"/);
-  assert.match(tabs, /status === 'connected'[\s\S]*?"bg-emerald-400"[\s\S]*?status === 'connecting'[\s\S]*?"bg-amber-400"[\s\S]*?"bg-rose-500"/);
-  assert.match(tabs, /sessionStatusDot\(session.status, hasActivity\)/);
-  assert.match(tabs, /hasActivity && sessionStatusDot\('connected', true\)/);
-});
@@ -298,7 +298,7 @@ declare global {
    // Listener is called with no arguments; return value is an unsubscribe function.
    onCheckDirtyEditors?(listener: () => void): () => void;
    // Report the dirty-check result back to the main process.
-    reportDirtyEditorsResult?(hasDirty: boolean, reason?: "editors" | "transfers"): void;
+    reportDirtyEditorsResult?(hasDirty: boolean): void;

    onLanguageChanged?(cb: (language: string) => void): () => void;