diff --git a/src/main/daemon/terminal-shell-lifecycle-scanner-app-zone.test.ts b/src/main/daemon/terminal-shell-lifecycle-scanner-app-zone.test.ts
new file mode 100644
index 00000000000..391832e9f9f
--- /dev/null
+++ b/src/main/daemon/terminal-shell-lifecycle-scanner-app-zone.test.ts
@@ -0,0 +1,89 @@
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { describe, expect, it, vi } from 'vitest'
+import { TerminalShellLifecycleScanner } from './terminal-shell-lifecycle-scanner'
+import { TerminalShellRecoveryBarrier } from './terminal-shell-recovery-barrier'
+
+// Real OMP 18.10.3 PTY bytes for one prompt: each user bubble ends with `B C D;0` (#10923).
+const OMP_TRANSCRIPT = readFileSync(
+  join(__dirname, '../runtime/__fixtures__/omp-user-bubble-osc133-zone.txt'),
+  'utf8'
+)
+const A = '\x1b]133;A\x07'
+const B = '\x1b]133;B\x07'
+const C = '\x1b]133;C\x07'
+const D0 = '\x1b]133;D;0\x07'
+// The shell's prompt and the typed command that launched OMP.
+const SHELL_LAUNCH = `${A}$ ${B}omp\r\n${C}`
+// OMP arms modifyOtherKeys, an input mode a command must disarm before its `D`.
+const ARM_MODIFY_OTHER_KEYS = '\x1b[>4;2m'
+
+function triggers(chunks: string[]): number[] {
+  const scanner = new TerminalShellLifecycleScanner()
+  const ends: number[] = []
+  let offset = 0
+  for (const chunk of chunks) {
+    let rest = chunk
+    let restOffset = offset
+    while (rest.length > 0) {
+      const events = scanner.scan(rest)
+      if (events.uncleanDeathTriggerEnd === undefined) {
+        break
+      }
+      ends.push(restOffset + events.uncleanDeathTriggerEnd)
+      restOffset += events.uncleanDeathTriggerEnd
+      rest = rest.slice(events.uncleanDeathTriggerEnd)
+    }
+    offset += chunk.length
+  }
+  return ends
+}
+
+function splitEvery(text: string, size: number): string[] {
+  const chunks: string[] = []
+  for (let index = 0; index < text.length; index += size) {
+    chunks.push(text.slice(index, index + size))
+  }
+  return chunks
+}
+
+describe('an OSC 133 zone a running app closes for itself', () => {
+  it.each([1, 3, 7, 64, SHELL_LAUNCH.length + OMP_TRANSCRIPT.length])(
+    "does not read OMP's bubble markers as its death, in %i-char chunks",
+    (size) => {
+      expect(triggers(splitEvery(SHELL_LAUNCH + OMP_TRANSCRIPT, size))).toEqual([])
+    }
+  )
+
+  it('still repairs after the app dies with its input mode armed', () => {
+    const stream = `${SHELL_LAUNCH}${ARM_MODIFY_OTHER_KEYS}${OMP_TRANSCRIPT}Killed\r\n${D0}`
+    expect(triggers([stream])).toEqual([stream.length])
+  })
+
+  it.each([
+    ['output separates the C from the D', `${B}${C}x${D0}`],
+    ['the typed command separates the B from the C', `${B}ls\r\n${C}${D0}`],
+    ['the D reports a failure', `${B}${C}\x1b]133;D;1\x07`]
+  ])('still reads a D as the end of the command when %s', (_label, zone) => {
+    const stream = `${SHELL_LAUNCH}${ARM_MODIFY_OTHER_KEYS}${zone}`
+    expect(triggers([stream])).toEqual([stream.length])
+  })
+
+  it('passes OMP output through the recovery barrier without holding it for a process probe', () => {
+    const released: string[] = []
+    const confirmShellForeground = vi.fn(async () => false)
+    const barrier = new TerminalShellRecoveryBarrier({
+      confirmShellForeground,
+      release: (emission) => released.push(emission.data),
+      isAlive: () => true
+    })
+    let seq = 0
+    for (const data of splitEvery(SHELL_LAUNCH + OMP_TRANSCRIPT, 4096)) {
+      barrier.accept({ data, rawStartSeq: seq, rawEndSeq: seq + data.length, transformed: false })
+      seq += data.length
+    }
+    expect(confirmShellForeground).not.toHaveBeenCalled()
+    expect(released.join('')).toBe(SHELL_LAUNCH + OMP_TRANSCRIPT)
+    barrier.dispose()
+  })
+})
diff --git a/src/main/daemon/terminal-shell-lifecycle-scanner.ts b/src/main/daemon/terminal-shell-lifecycle-scanner.ts
index 6874d7b1161..a71ce8e1c87 100644
--- a/src/main/daemon/terminal-shell-lifecycle-scanner.ts
+++ b/src/main/daemon/terminal-shell-lifecycle-scanner.ts
@@ -1,4 +1,5 @@
 import { buildProcessBoundaryGround } from '../../shared/terminal-mode-reset-profiles'
+import { closesAppOsc133Zone } from '../../shared/terminal-osc133-command-finished'
 import type { TerminalOwner } from '../../shared/terminal-owner'
 import { TerminalArmedInputModes } from './terminal-armed-input-modes'
 
@@ -60,6 +61,8 @@ export class TerminalShellLifecycleScanner {
   private generationState = 0
   private altActive = false
   private commandEnteredAlternateScreen = false
+  // OSC 133 markers seen back to back since the last other output.
+  private adjacentMarkers = ''
   private readonly inputModes = new TerminalArmedInputModes()
 
   get owner(): TerminalOwner | undefined {
@@ -109,6 +112,9 @@ export class TerminalShellLifecycleScanner {
     // with no escape introducer must not pay the regex pass. Split sequences
     // stay correct because a partial one always left a non-empty scanTail.
     if (this.scanTail.length === 0 && !chunk.includes('\x1b') && !chunk.includes('\x9b')) {
+      if (chunk.length > 0) {
+        this.adjacentMarkers = ''
+      }
       return events
     }
     const previousTailLength = this.scanTail.length
@@ -117,8 +123,13 @@ export class TerminalShellLifecycleScanner {
     // The shared regex is safe because scan() is synchronous and never re-enters.
     SEQUENCE_RE.lastIndex = 0
     let match: RegExpExecArray | null
+    let outputEnd = 0
     while ((match = SEQUENCE_RE.exec(input)) !== null) {
       const oscPayload = match[1]
+      const markersBefore = match.index > outputEnd ? '' : this.adjacentMarkers
+      outputEnd = match.index + match[0].length
+      this.adjacentMarkers =
+        oscPayload === undefined ? '' : (markersBefore + oscPayload.slice(0, 1)).slice(-2)
       if (match[0] === '\x1bc') {
         this.revoke()
         this.inputModes.reset()
@@ -137,7 +148,8 @@ export class TerminalShellLifecycleScanner {
         if (marker === 'A') {
           this.inputModes.markPrompt()
         }
-        if (marker !== 'D') {
+        // Why: an app closing its own zone is still running, so its `D` proves no exit (#10923).
+        if (marker !== 'D' || closesAppOsc133Zone(markersBefore, oscPayload)) {
           continue
         }
         // An alternate screen or a command's input mode still up at command-finished
@@ -208,6 +220,9 @@ export class TerminalShellLifecycleScanner {
         }
       }
     }
+    if (input.length - this.scanTail.length > outputEnd) {
+      this.adjacentMarkers = ''
+    }
     return events
   }
 
diff --git a/src/shared/terminal-osc133-command-finished.ts b/src/shared/terminal-osc133-command-finished.ts
index ab3d5a25055..bfa816a6cd9 100644
--- a/src/shared/terminal-osc133-command-finished.ts
+++ b/src/shared/terminal-osc133-command-finished.ts
@@ -50,6 +50,16 @@ function findPrefixCarry(data: string): string {
   return ''
 }
 
+/**
+ * TUIs such as OMP end each prompt bubble with `B C D;0`, closing their own zone while they keep
+ * running (#10923). A shell's `C` follows the typed command line, never its own prompt's `B`
+ * directly. `adjacentMarkers` holds the markers seen back to back before this one, e.g. 'BC'.
+ */
+export function closesAppOsc133Zone(adjacentMarkers: string, payload: string): boolean {
+  const [sequence, exitCode] = payload.split(';')
+  return sequence === 'D' && exitCode === '0' && adjacentMarkers.endsWith('BC')
+}
+
 export type Osc133CommandFinishedScanner = {
   /** Feed one raw PTY chunk; fires once per complete OSC 133;D sequence. */
   scan: (data: string) => void
@@ -76,10 +86,8 @@ export function createOsc133CommandFinishedScanner(
 
   const handleOsc133 = (payload: string, endInChunk: number): void => {
     const [sequence, exitCode] = payload.split(';')
-    // Why: TUIs such as OMP end each prompt bubble with `B C D;0`, closing their own zone while
-    // they keep running (#10923). Read as the command's exit, that `D` retired a live agent's
-    // status. A shell's `C` follows the typed command line, never its own prompt's `B` directly.
-    const closesAppZone = sequence === 'D' && exitCode === '0' && adjacentMarkers.endsWith('BC')
+    // Why: read as the command's exit, that `D` retired a live agent's status.
+    const closesAppZone = closesAppOsc133Zone(adjacentMarkers, payload)
     adjacentMarkers = (adjacentMarkers + sequence.slice(0, 1)).slice(-2)
     if (closesAppZone) {
       return