diff --git a/config/scripts/wsl-hook-relay-reattach-benchmark.mjs b/config/scripts/wsl-hook-relay-reattach-benchmark.mjs
new file mode 100644
index 00000000000..07ca9b3d633
--- /dev/null
+++ b/config/scripts/wsl-hook-relay-reattach-benchmark.mjs
@@ -0,0 +1,397 @@
+import { spawn } from 'node:child_process'
+import { existsSync, readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { performance } from 'node:perf_hooks'
+import process from 'node:process'
+
+import { createJiti } from 'jiti'
+
+const DEFAULT_SAMPLES = 20
+const PANE_KEY = 'wsl-relay-bench:11111111-1111-4111-8111-111111111111'
+const WSL_PATH = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
+
+function parseArgs(argv) {
+  const options = { distro: null, samples: DEFAULT_SAMPLES }
+  for (let index = 0; index < argv.length; index++) {
+    const arg = argv[index]
+    if (arg === '--distro') {
+      options.distro = argv[++index] ?? null
+    } else if (arg === '--samples') {
+      options.samples = Number(argv[++index])
+    } else {
+      throw new Error(`Unknown argument: ${arg}`)
+    }
+  }
+  if (!Number.isInteger(options.samples) || options.samples < 5 || options.samples > 100) {
+    throw new Error('--samples must be an integer between 5 and 100')
+  }
+  return options
+}
+
+function run(command, args, options = {}) {
+  return new Promise((resolve, reject) => {
+    const child = spawn(command, args, {
+      cwd: options.cwd,
+      env: options.env,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true
+    })
+    const stdout = []
+    const stderr = []
+    child.stdout.on('data', (chunk) => stdout.push(chunk))
+    child.stderr.on('data', (chunk) => stderr.push(chunk))
+    child.on('error', reject)
+    child.on('close', (status) => {
+      const result = {
+        status,
+        stdout: Buffer.concat(stdout).toString('utf8'),
+        stderr: Buffer.concat(stderr).toString('utf8')
+      }
+      if (status === 0 || options.allowFailure) {
+        resolve(result)
+      } else {
+        reject(new Error(`${command} exited ${status}: ${result.stderr.trim()}`))
+      }
+    })
+    child.stdin.end(options.input)
+  })
+}
+
+function wslArgs(distro, args) {
+  return ['-d', distro, '--exec', ...args]
+}
+
+async function resolveDistro(requested) {
+  if (requested) {
+    return requested
+  }
+  const listed = await run('wsl.exe', ['--list', '--quiet'], {
+    env: { ...process.env, WSL_UTF8: '1' }
+  })
+  const distro = listed.stdout
+    .replaceAll('\0', '')
+    .split(/\r?\n/)
+    .map((value) => value.trim())
+    .find(Boolean)
+  if (!distro) {
+    throw new Error('No WSL distro is installed')
+  }
+  return distro
+}
+
+async function readGuestFile(distro, path) {
+  const result = await run('wsl.exe', wslArgs(distro, ['/bin/cat', path]), {
+    allowFailure: true
+  })
+  return result.status === 0 ? result.stdout : null
+}
+
+async function waitFor(description, probe, timeoutMs = 30_000) {
+  const deadline = Date.now() + timeoutMs
+  while (Date.now() < deadline) {
+    const value = await probe()
+    if (value) {
+      return value
+    }
+    await new Promise((resolve) => setTimeout(resolve, 100))
+  }
+  throw new Error(`Timed out waiting for ${description}`)
+}
+
+function parseEndpoint(contents) {
+  const port = Number(/ORCA_AGENT_HOOK_PORT=['"]?(\d+)/.exec(contents)?.[1])
+  const token = /ORCA_AGENT_HOOK_TOKEN=['"]?([^'"\r\n]+)/.exec(contents)?.[1]
+  return Number.isInteger(port) && port > 0 && token ? { port, token } : null
+}
+
+async function freeGuestPort(distro) {
+  const result = await run(
+    'wsl.exe',
+    wslArgs(distro, [
+      '/usr/bin/python3',
+      '-c',
+      'import socket; s=socket.socket(); s.bind(("127.0.0.1",0)); print(s.getsockname()[1]); s.close()'
+    ])
+  )
+  const port = Number(result.stdout.trim())
+  if (!Number.isInteger(port) || port <= 0) {
+    throw new Error(`Could not reserve a guest port: ${result.stdout}`)
+  }
+  return port
+}
+
+async function startStallingGuestServer(distro) {
+  const source = [
+    'import socket,sys,threading',
+    'stop=threading.Event()',
+    'threading.Thread(target=lambda:(sys.stdin.buffer.read(),stop.set()),daemon=True).start()',
+    'server=socket.socket()',
+    'server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)',
+    'server.bind(("127.0.0.1",0))',
+    'server.listen()',
+    'server.settimeout(0.1)',
+    'print(f"READY {server.getsockname()[1]}",flush=True)',
+    'held=[]',
+    'while not stop.is_set():',
+    ' try:',
+    '  client,_=server.accept(); held.append(client); print("ACCEPT",flush=True)',
+    ' except TimeoutError: pass',
+    'for client in held: client.close()',
+    'server.close()'
+  ].join('\n')
+  const child = spawn('wsl.exe', wslArgs(distro, ['/usr/bin/python3', '-u', '-c', source]), {
+    stdio: ['pipe', 'pipe', 'pipe'],
+    windowsHide: true
+  })
+  let output = ''
+  let accepted = 0
+  child.stdout.on('data', (chunk) => {
+    output += chunk.toString('utf8')
+    accepted += chunk.toString('utf8').split('ACCEPT').length - 1
+  })
+  const port = await waitFor('stalling WSL listener', async () => {
+    const match = /READY (\d+)/.exec(output)
+    return match ? Number(match[1]) : null
+  })
+  return {
+    port,
+    accepted: () => accepted,
+    stop: async () => {
+      child.stdin.end()
+      await new Promise((resolve) => child.once('close', resolve))
+    }
+  }
+}
+
+async function writeEndpoint(distro, path, endpoint) {
+  const contents = [
+    `ORCA_AGENT_HOOK_PORT=${endpoint.port}`,
+    `ORCA_AGENT_HOOK_TOKEN=${endpoint.token}`,
+    'ORCA_AGENT_HOOK_ENV=benchmark',
+    'ORCA_AGENT_HOOK_VERSION=1',
+    ''
+  ].join('\n')
+  await run(
+    'wsl.exe',
+    wslArgs(distro, [
+      '/bin/sh',
+      '-c',
+      'umask 077; mkdir -p "$(dirname "$1")"; cat > "$1"',
+      'orca-wsl-benchmark',
+      path
+    ]),
+    { input: contents }
+  )
+}
+
+async function invokeHook(distro, scriptPath, endpointPath) {
+  const startedAt = performance.now()
+  const result = await run(
+    'wsl.exe',
+    wslArgs(distro, [
+      '/usr/bin/env',
+      `PATH=${WSL_PATH}`,
+      `ORCA_AGENT_HOOK_ENDPOINT=${endpointPath}`,
+      `ORCA_PANE_KEY=${PANE_KEY}`,
+      'ORCA_TAB_ID=wsl-relay-bench',
+      'ORCA_WORKTREE_ID=wsl-relay-bench',
+      '/bin/sh',
+      scriptPath
+    ]),
+    { input: JSON.stringify({ hook_event_name: 'UserPromptSubmit', prompt: 'benchmark' }) }
+  )
+  return { status: result.status, elapsedMs: performance.now() - startedAt }
+}
+
+function percentile(samples, percentileValue) {
+  const sorted = [...samples].sort((left, right) => left - right)
+  return sorted[Math.ceil((percentileValue / 100) * sorted.length) - 1]
+}
+
+function summarize(samples) {
+  return {
+    samples: samples.length,
+    medianMs: Number(percentile(samples, 50).toFixed(1)),
+    p95Ms: Number(percentile(samples, 95).toFixed(1)),
+    minMs: Number(Math.min(...samples).toFixed(1)),
+    maxMs: Number(Math.max(...samples).toFixed(1))
+  }
+}
+
+async function main() {
+  if (process.platform !== 'win32') {
+    throw new Error('This benchmark requires a Windows host with WSL')
+  }
+  const options = parseArgs(process.argv.slice(2))
+  const distro = await resolveDistro(options.distro)
+  const nodeVersion = await run(
+    'wsl.exe',
+    wslArgs(distro, [
+      '/bin/sh',
+      '-c',
+      'for node_bin in "$(command -v node 2>/dev/null || true)" "$HOME/.local/bin/node"; do [ -x "$node_bin" ] || continue; "$node_bin" -p process.versions.node && exit 0; done; exit 1'
+    ]),
+    { allowFailure: true }
+  )
+  if (nodeVersion.status !== 0 || Number(nodeVersion.stdout.trim().split('.')[0]) < 18) {
+    throw new Error(`WSL distro '${distro}' needs Node.js 18 or newer to run Orca's relay`)
+  }
+
+  const bundleDir = join(process.cwd(), 'out', 'relay', 'wsl')
+  const bundlePath = join(bundleDir, 'wsl-agent-hook-relay.js')
+  const versionPath = join(bundleDir, '.version')
+  if (!existsSync(bundlePath) || !existsSync(versionPath)) {
+    await run(process.execPath, [join('config', 'scripts', 'build-relay.mjs')], {
+      cwd: process.cwd()
+    })
+  }
+
+  const jiti = createJiti(import.meta.url)
+  const [{ WslHookRelayManager }, { ensureWslHookRelayForReattach }, { codexHookService }] =
+    await Promise.all([
+      jiti.import('../../src/main/agent-hooks/wsl-hook-relay-manager.ts'),
+      jiti.import('../../src/main/agent-hooks/wsl-hook-relay-reattach.ts'),
+      jiti.import('../../src/main/codex/hook-service.ts')
+    ])
+  const { MANAGED_AGENT_HOOK_TARGETS } = await jiti.import(
+    '../../src/shared/managed-agent-hook-targets.ts'
+  )
+  const guestHome = (
+    await run('wsl.exe', wslArgs(distro, ['/bin/sh', '-c', 'printf %s "$HOME"']))
+  ).stdout.trim()
+  const instanceKey = `bench-${process.pid}-${Date.now().toString(36)}`
+  const benchmarkRoot = `${guestHome}/.orca-wsl/benchmarks/${instanceKey}`
+  const scriptPath = `${benchmarkRoot}/.orca/agent-hooks/codex-hook.sh`
+  const endpointPath = `${guestHome}/.orca-wsl/agent-hooks/instance-${instanceKey}/endpoint.env`
+  const cleanupPaths = [benchmarkRoot, `${guestHome}/.orca-wsl/agent-hooks/instance-${instanceKey}`]
+  if (cleanupPaths.some((cleanupPath) => !cleanupPath.startsWith(`${guestHome}/.orca-wsl/`))) {
+    throw new Error('Refusing to use an unexpected guest cleanup path')
+  }
+  const disabledTuiAgents = MANAGED_AGENT_HOOK_TARGETS.filter(
+    (target) => target.tuiAgent !== 'codex'
+  ).map((target) => target.tuiAgent)
+  const bundleVersion = readFileSync(versionPath, 'utf8').trim()
+  const warnings = []
+  let delivered = 0
+  let manager = null
+  let staller = null
+
+  const createManager = async (token) => {
+    const preferredPort = await freeGuestPort(distro)
+    return new WslHookRelayManager({
+      platform: () => 'win32',
+      remoteHooksEnabled: () => true,
+      hookCoordsEnv: () => ({
+        ORCA_AGENT_HOOK_PORT: String(preferredPort),
+        ORCA_AGENT_HOOK_TOKEN: token,
+        ORCA_AGENT_HOOK_ENV: 'benchmark',
+        ORCA_AGENT_HOOK_VERSION: '1'
+      }),
+      instanceKey: () => instanceKey,
+      resolveBundle: () => ({ jsPath: bundlePath, version: bundleVersion }),
+      listDistros: async () => [distro],
+      ingest: () => {
+        delivered++
+      },
+      installHooks: async (sftp) => [
+        await codexHookService.installRemote(sftp, benchmarkRoot, {
+          codexHomeDir: `${benchmarkRoot}/codex-home`,
+          deferTrustUntilConfigToml: true
+        })
+      ],
+      managedHookSettings: () => ({
+        agentCmdOverrides: { codex: '/bin/true' },
+        disabledTuiAgents
+      }),
+      pluginSources: () => ({}),
+      warn: (message) => warnings.push(message),
+      transientRetryDelayMs: 100
+    })
+  }
+
+  try {
+    manager = await createManager('before-restart-token')
+    manager.ensureForDistro(distro)
+    await waitFor('initial relay and generated Codex hook', async () => {
+      const [endpoint, script] = await Promise.all([
+        readGuestFile(distro, endpointPath),
+        readGuestFile(distro, scriptPath)
+      ])
+      return endpoint?.includes('before-restart-token') && script?.includes('--max-time')
+    })
+    manager.disposeAll()
+    manager = null
+
+    staller = await startStallingGuestServer(distro)
+    await writeEndpoint(distro, endpointPath, {
+      port: staller.port,
+      token: 'stale-token'
+    })
+
+    await invokeHook(distro, scriptPath, endpointPath)
+    const staleSamples = []
+    for (let index = 0; index < options.samples; index++) {
+      staleSamples.push((await invokeHook(distro, scriptPath, endpointPath)).elapsedMs)
+    }
+
+    delivered = 0
+    manager = await createManager('after-restart-token')
+    ensureWslHookRelayForReattach({ isReattach: true, wslDistro: distro }, null, (ownedDistro) =>
+      manager.ensureForDistro(ownedDistro)
+    )
+    const refreshedEndpoint = await waitFor('reattached relay endpoint rewrite', async () => {
+      const contents = await readGuestFile(distro, endpointPath)
+      const parsed = contents ? parseEndpoint(contents) : null
+      return parsed && parsed.token === 'after-restart-token' ? parsed : null
+    })
+
+    await invokeHook(distro, scriptPath, endpointPath)
+    await waitFor('refreshed hook warmup delivery', async () => (delivered >= 1 ? true : null))
+    delivered = 0
+    const refreshedSamples = []
+    for (let index = 0; index < options.samples; index++) {
+      refreshedSamples.push((await invokeHook(distro, scriptPath, endpointPath)).elapsedMs)
+    }
+    await waitFor('all refreshed hooks to reach the host', async () =>
+      delivered >= options.samples ? true : null
+    )
+
+    const stale = summarize(staleSamples)
+    const refreshed = summarize(refreshedSamples)
+    const result = {
+      distro,
+      endpointPath,
+      endpointPortAfterReattach: refreshedEndpoint.port,
+      stale,
+      refreshed,
+      medianSpeedup: Number((stale.medianMs / refreshed.medianMs).toFixed(1)),
+      stalledConnections: staller.accepted(),
+      delivered,
+      warnings
+    }
+    console.log(JSON.stringify(result, null, 2))
+
+    if (stale.medianMs < 1_000) {
+      throw new Error(`Stale endpoint did not exercise the timeout path: ${stale.medianMs}ms`)
+    }
+    if (refreshed.p95Ms >= 1_000) {
+      throw new Error(`Refreshed endpoint p95 regressed: ${refreshed.p95Ms}ms`)
+    }
+    if (delivered !== options.samples) {
+      throw new Error(`Expected ${options.samples} delivered hooks, received ${delivered}`)
+    }
+  } finally {
+    manager?.disposeAll()
+    await staller?.stop()
+    for (const cleanupPath of cleanupPaths) {
+      await run('wsl.exe', wslArgs(distro, ['/bin/rm', '-rf', '--', cleanupPath]), {
+        allowFailure: true
+      })
+    }
+  }
+}
+
+main().catch((error) => {
+  console.error(error instanceof Error ? error.message : String(error))
+  process.exitCode = 1
+})
diff --git a/package.json b/package.json
index 76b037f94d9..df0f0ed2533 100644
--- a/package.json
+++ b/package.json
@@ -109,6 +109,7 @@
     "bench:macos-computer-helper-owner-loss": "node config/scripts/macos-computer-helper-owner-loss-benchmark.mjs",
     "bench:startup": "pnpm run ensure:electron-runtime && node tests/tools/benchmarks/startup-time-bench.mjs",
     "bench:daemon-coldstart": "pnpm run ensure:electron-runtime && node tests/tools/benchmarks/daemon-coldstart-bench.mjs",
+    "bench:wsl-hook-relay-reattach": "pnpm run build:relay && node config/scripts/wsl-hook-relay-reattach-benchmark.mjs",
     "bench:hang-watchdog-memory": "pnpm run ensure:electron-runtime && node config/scripts/hang-watchdog-memory-benchmark.mjs",
     "bench:main-thread-jank": "pnpm run ensure:electron-runtime && node tests/tools/benchmarks/main-thread-jank-bench.mjs",
     "bench:worktree-deletion": "node tests/tools/benchmarks/worktree-deletion-dev-bench.mjs",
diff --git a/src/main/agent-hooks/wsl-hook-relay-reattach.test.ts b/src/main/agent-hooks/wsl-hook-relay-reattach.test.ts
new file mode 100644
index 00000000000..8e9e425a05c
--- /dev/null
+++ b/src/main/agent-hooks/wsl-hook-relay-reattach.test.ts
@@ -0,0 +1,37 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { ensureWslHookRelayForReattach } from './wsl-hook-relay-reattach'
+
+describe('ensureWslHookRelayForReattach', () => {
+  it('refreshes the surviving session distro after a local reattach', () => {
+    const ensure = vi.fn()
+
+    ensureWslHookRelayForReattach({ isReattach: true, wslDistro: 'Ubuntu-24.04' }, null, ensure)
+
+    expect(ensure).toHaveBeenCalledOnce()
+    expect(ensure).toHaveBeenCalledWith('Ubuntu-24.04')
+  })
+
+  it.each([
+    ['fresh WSL spawn', { wslDistro: 'Ubuntu' }, null],
+    ['native reattach', { isReattach: true, wslDistro: null }, null],
+    ['legacy reattach without ownership context', { isReattach: true }, null],
+    ['blank distro', { isReattach: true, wslDistro: '  ' }, null],
+    ['SSH reattach', { isReattach: true, wslDistro: 'Ubuntu' }, 'ssh-1']
+  ])('does not refresh a %s', (_label, result, connectionId) => {
+    const ensure = vi.fn()
+
+    ensureWslHookRelayForReattach(result, connectionId, ensure)
+
+    expect(ensure).not.toHaveBeenCalled()
+  })
+
+  it('preserves exact distro ownership across multiple local reattachments', () => {
+    const ensure = vi.fn()
+
+    ensureWslHookRelayForReattach({ isReattach: true, wslDistro: 'Ubuntu' }, null, ensure)
+    ensureWslHookRelayForReattach({ isReattach: true, wslDistro: 'Debian' }, null, ensure)
+
+    expect(ensure.mock.calls).toEqual([['Ubuntu'], ['Debian']])
+  })
+})
diff --git a/src/main/agent-hooks/wsl-hook-relay-reattach.ts b/src/main/agent-hooks/wsl-hook-relay-reattach.ts
new file mode 100644
index 00000000000..837fe82b983
--- /dev/null
+++ b/src/main/agent-hooks/wsl-hook-relay-reattach.ts
@@ -0,0 +1,20 @@
+import type { PtySpawnResult } from '../providers/pty-spawn-result'
+import { wslHookRelayManager } from './wsl-hook-relay-manager'
+
+type ReattachResult = Pick<PtySpawnResult, 'isReattach' | 'wslDistro'>
+
+export function ensureWslHookRelayForReattach(
+  result: ReattachResult,
+  connectionId?: string | null,
+  ensureForDistro: (distro: string) => void = (distro) =>
+    wslHookRelayManager.ensureForDistro(distro)
+): void {
+  // Why: the current renderer preference can differ from the surviving PTY's proven distro ownership.
+  if (connectionId || result.isReattach !== true || typeof result.wslDistro !== 'string') {
+    return
+  }
+  const distro = result.wslDistro.trim()
+  if (distro) {
+    ensureForDistro(distro)
+  }
+}
diff --git a/src/main/ipc/pty.ts b/src/main/ipc/pty.ts
index 54ce28b6825..c80732744f2 100644
--- a/src/main/ipc/pty.ts
+++ b/src/main/ipc/pty.ts
@@ -58,6 +58,7 @@ import {
 } from '../../shared/command-token-scanner'
 import { agentHookServer } from '../agent-hooks/server'
 import { wslHookRelayManager } from '../agent-hooks/wsl-hook-relay-manager'
+import { ensureWslHookRelayForReattach } from '../agent-hooks/wsl-hook-relay-reattach'
 import { isAgentStatusHooksEnabled } from '../agent-hooks/managed-agent-hook-controls'
 import { piTitlebarExtensionService } from '../pi/titlebar-extension-service'
 import {
@@ -4300,7 +4301,7 @@ export function registerPtyHandlers(
         if (!handle) {
           throw new Error('terminal_pane_owner_unknown')
         }
-        return {
+        const result = {
           id: preAdoptedStablePane.result.id,
           ...(preAdoptedStablePane.result.incarnationId
             ? { incarnationId: preAdoptedStablePane.result.incarnationId }
@@ -4314,6 +4315,11 @@ export function registerPtyHandlers(
             leafId: preAdoptedStablePane.owner.leafId
           }
         }
+        ensureWslHookRelayForReattach(
+          { isReattach: true, wslDistro: preAdoptedStablePane.result.wslDistro },
+          args.connectionId
+        )
+        return result
       }
       if (!preAdoptedStablePane) {
         await assertFolderWorkspacePtyPathUsable(args.worktreeId)
@@ -4882,6 +4888,7 @@ export function registerPtyHandlers(
               sequenceBeforeProviderSpawn
             )
           }
+          ensureWslHookRelayForReattach(result, args.connectionId)
           runtime?.preparePtyExecutionContext?.(
             result.id,
             args.connectionId
@@ -6225,6 +6232,7 @@ export function registerPtyHandlers(
               sequenceBeforeProviderSpawn
             )
           }
+          ensureWslHookRelayForReattach(result, args.connectionId)
           runtime?.preparePtyExecutionContext?.(
             result.id,
             args.connectionId