diff --git a/packages/app/src/utils/global-clipboard.test.ts b/packages/app/src/utils/global-clipboard.test.ts
index 4d1bb5547..609deb83c 100644
--- a/packages/app/src/utils/global-clipboard.test.ts
+++ b/packages/app/src/utils/global-clipboard.test.ts
@@ -370,4 +370,119 @@ describe("installGlobalClipboardFallback", () => {
     expect(event.defaultPrevented).toBe(false)
     expect(bridge.posted).toHaveLength(0)
   })
+
+  // --- Select-all (Cmd+A) ---
+
+  test("mod+A selects all text in a form field", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = field("text", "hello world", 3, 3)
+
+    const event = keydown(el, "a")
+
+    expect(event.defaultPrevented).toBe(true)
+    expect(el.selectionStart).toBe(0)
+    expect(el.selectionEnd).toBe(11)
+  })
+
+  test("mod+A selects all content in a contenteditable", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = editableDiv("hello world")
+
+    const event = keydown(el, "a")
+
+    expect(event.defaultPrevented).toBe(true)
+    const selection = window.getSelection()!
+    expect(selection.toString()).toBe("hello world")
+  })
+
+  test("mod+A in a textarea selects all its text", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = document.createElement("textarea")
+    el.value = "line1\nline2"
+    document.body.appendChild(el)
+    el.setSelectionRange(2, 2)
+
+    const event = keydown(el, "a")
+
+    expect(event.defaultPrevented).toBe(true)
+    expect(el.selectionStart).toBe(0)
+    expect(el.selectionEnd).toBe(11)
+  })
+
+  // --- Undo (Cmd+Z) ---
+
+  test("mod+Z calls execCommand undo on a contenteditable", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = editableDiv("hello")
+
+    const event = keydown(el, "z")
+
+    expect(event.defaultPrevented).toBe(true)
+  })
+
+  test("mod+Z calls execCommand undo on a form field", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = field("text", "hello world", 5, 5)
+
+    const event = keydown(el, "z")
+
+    expect(event.defaultPrevented).toBe(true)
+  })
+
+  // --- Redo (Cmd+Shift+Z / Cmd+Y) ---
+
+  test("mod+Shift+Z calls execCommand redo", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = editableDiv("hello")
+
+    const event = keydown(el, "z", { shiftKey: true })
+
+    expect(event.defaultPrevented).toBe(true)
+  })
+
+  test("mod+Y calls execCommand redo", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = editableDiv("hello")
+
+    const event = keydown(el, "y")
+
+    expect(event.defaultPrevented).toBe(true)
+  })
+
+  // --- Guard preservation ---
+
+  test("mod+A in an unframed window is not intercepted", () => {
+    install(window) // unframed: parent === self
+    const el = field("text", "hello", 2, 2)
+
+    const event = keydown(el, "a")
+
+    expect(event.defaultPrevented).toBe(false)
+  })
+
+  test("mod+Z on a non-editable target is not intercepted", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const button = document.createElement("button")
+    document.body.appendChild(button)
+
+    const event = keydown(button, "z")
+
+    expect(event.defaultPrevented).toBe(false)
+  })
+
+  test("shift+alt chords with editing keys are still ignored", () => {
+    const bridge = framedWindow()
+    install(bridge.win)
+    const el = field("text", "abc", 0, 3)
+
+    expect(keydown(el, "a", { altKey: true }).defaultPrevented).toBe(false)
+  })
 })
diff --git a/packages/app/src/utils/global-clipboard.ts b/packages/app/src/utils/global-clipboard.ts
index cf49516ab..86c6ca4a2 100644
--- a/packages/app/src/utils/global-clipboard.ts
+++ b/packages/app/src/utils/global-clipboard.ts
@@ -1,11 +1,12 @@
-// Framed-app clipboard fallback, generalized from the prompt input's bridge.
-// Inside the VS Code webview iframe, native paste never fires and native
-// copy never reaches the OS clipboard (see prompt-input/clipboard-bridge.ts
-// for the full why) — so every editable outside the prompt (Connections
-// credential fields, settings inputs, …) silently ignores ⌘V and poisons the
-// next paste on ⌘C. This module intercepts mod+V/C/X at the window's capture
-// phase and routes them over the existing extension-host bridge. Unframed
-// (plain web/desktop), it does nothing — native clipboard behavior stands.
+// Framed-app editing fallback, generalized from the prompt input's bridge.
+// Inside the VS Code webview iframe, native editing shortcuts never fire:
+// paste never reaches the DOM, copy never writes the OS clipboard, and
+// select-all / undo / redo are suppressed by the Electron platform layer
+// (see prompt-input/clipboard-bridge.ts for the full why). This module
+// intercepts mod+V/C/X/A/Z/Y at the window's capture phase and implements
+// them explicitly in JS — clipboard ops route over the extension-host bridge,
+// and select-all / undo / redo call the DOM APIs directly. Unframed
+// (plain web/desktop), it does nothing — native editing behavior stands.
 
 import { readClipboardViaBridge, writeClipboardViaBridge } from "@/components/prompt-input/clipboard-bridge"
 
@@ -133,6 +134,23 @@ export function extractSelection(el: HTMLElement, opts: { cut?: boolean } = {}):
   return text
 }
 
+// Select all content in an editable element — the JS equivalent of the native
+// Cmd+A that the VS Code/Electron platform layer suppresses inside the iframe.
+function selectAll(target: HTMLElement): void {
+  if (isFormField(target)) {
+    target.select()
+    return
+  }
+  // contenteditable: select all children of the editable root
+  const selection = target.ownerDocument.defaultView?.getSelection()
+  if (selection) {
+    selection.removeAllRanges()
+    const range = target.ownerDocument.createRange()
+    range.selectNodeContents(target)
+    selection.addRange(range)
+  }
+}
+
 // Capture-phase so it sees the keystroke before any component handler, and
 // window-level so portaled UI (popovers, dialogs) is covered too. Returns an
 // uninstall function; the handler re-checks framing per event, so installing
@@ -140,13 +158,37 @@ export function extractSelection(el: HTMLElement, opts: { cut?: boolean } = {}):
 export function installGlobalClipboardFallback(win: Window = window): () => void {
   const onKeyDown = (event: KeyboardEvent) => {
     if (win.parent === win) return // unframed: native clipboard works — stay out
-    if (!(event.metaKey || event.ctrlKey) || event.altKey || event.shiftKey) return
+    if (!(event.metaKey || event.ctrlKey) || event.altKey) return
     if (event.isComposing) return
     const key = event.key.toLowerCase()
-    if (key !== "v" && key !== "c" && key !== "x") return
+
+    // Redo: Cmd+Shift+Z (shift allowed only for this chord)
+    const isRedo = key === "z" && event.shiftKey
+    // All other editing shortcuts require NO shift
+    if (event.shiftKey && !isRedo) return
+
+    if (key !== "v" && key !== "c" && key !== "x" && key !== "a" && key !== "z" && key !== "y") return
     const target = event.target
     if (!isEditableTarget(target)) return // non-editables keep native behavior
 
+    // --- Select all ---
+    if (key === "a") {
+      event.preventDefault()
+      selectAll(target)
+      return
+    }
+
+    // --- Undo / Redo ---
+    if (key === "z" || key === "y") {
+      event.preventDefault()
+      const doc = target.ownerDocument
+      if (typeof doc.execCommand === "function") {
+        doc.execCommand(isRedo || key === "y" ? "redo" : "undo")
+      }
+      return
+    }
+
+    // --- Clipboard: paste, copy, cut ---
     if (key === "v") {
       if (target.closest(CLIPBOARD_SELF_SELECTOR)) return // element owns its own paste
       // Native paste never fires in-frame, so preventDefault loses nothing;