diff --git a/packages/supacloud-lite/scripts/package-smoke.ts b/packages/supacloud-lite/scripts/package-smoke.ts
index 2441db545..4996e708f 100644
--- a/packages/supacloud-lite/scripts/package-smoke.ts
+++ b/packages/supacloud-lite/scripts/package-smoke.ts
@@ -2,6 +2,7 @@ import { access, mkdtemp, rm, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { dirname, join, resolve } from 'node:path'
 import packageJson from '../package.json' with { type: 'json' }
+import { withWindowsSubprocessRef } from './subprocess.js'
 
 const packageDir = resolve(import.meta.dir, '..')
 const packDir = await mkdtemp(join(tmpdir(), 'supacloud-lite-pack-'))
@@ -120,12 +121,14 @@ async function runCommandExpectingFailure(command: string[], cwd: string, env: N
 
 async function executeCommand(command: string[], cwd: string, env: NodeJS.ProcessEnv): Promise<CommandExecution> {
   const processHandle = Bun.spawn({ cmd: command, cwd, stdout: 'pipe', stderr: 'pipe', env })
-  const [exitCode, stdout, stderr] = await Promise.all([
-    processHandle.exited,
-    new Response(processHandle.stdout).text(),
-    new Response(processHandle.stderr).text(),
-  ])
-  return { exitCode, stdout, stderr }
+  return await withWindowsSubprocessRef(async () => {
+    const [exitCode, stdout, stderr] = await Promise.all([
+      processHandle.exited,
+      new Response(processHandle.stdout).text(),
+      new Response(processHandle.stderr).text(),
+    ])
+    return { exitCode, stdout, stderr }
+  })
 }
 
 interface CommandExecution {
diff --git a/packages/supacloud-lite/scripts/standalone-smoke.ts b/packages/supacloud-lite/scripts/standalone-smoke.ts
index f2b23cb21..9e37eb55b 100644
--- a/packages/supacloud-lite/scripts/standalone-smoke.ts
+++ b/packages/supacloud-lite/scripts/standalone-smoke.ts
@@ -2,6 +2,7 @@ import { access, mkdir, mkdtemp, readFile, rm, stat, writeFile } from 'node:fs/p
 import { tmpdir } from 'node:os'
 import { join, resolve } from 'node:path'
 import packageJson from '../package.json' with { type: 'json' }
+import { withWindowsSubprocessRef } from './subprocess.js'
 
 const packageDir = resolve(import.meta.dir, '..')
 const binary = resolveStandaloneBinary()
@@ -225,7 +226,7 @@ async function withServer(options: ServerOptions, check: (url: string) => Promis
   } finally {
     console.log(`[standalone-smoke] ${options.phaseLabel}: stop`)
     processHandle.kill('SIGTERM')
-    const exitCode = await processHandle.exited
+    const exitCode = await withWindowsSubprocessRef(() => processHandle.exited)
     const expectedExitCode = expectedStandaloneShutdownExitCode()
     console.log(
       `[standalone-smoke] ${options.phaseLabel}: ${exitCode === expectedExitCode ? 'ok' : 'failed'} (exit ${exitCode})`,
@@ -276,7 +277,7 @@ async function runCommand(
   const processHandle = Bun.spawn({ cmd: command, cwd, env, stdout: 'pipe', stderr: 'pipe' })
   const stdoutPromise = new Response(processHandle.stdout).text()
   const stderrPromise = new Response(processHandle.stderr).text()
-  const exitCode = await processHandle.exited
+  const exitCode = await withWindowsSubprocessRef(() => processHandle.exited)
   console.log(`[standalone-smoke] ${commandLabel}: ${exitCode === 0 ? 'ok' : 'failed'} (exit ${exitCode})`)
   const [stdout, stderr] = await Promise.all([stdoutPromise, stderrPromise])
   if (exitCode !== 0) throw new Error(`standalone command "${commandLabel}" failed (${exitCode})\n${stdout}\n${stderr}`)
diff --git a/packages/supacloud-lite/scripts/subprocess.ts b/packages/supacloud-lite/scripts/subprocess.ts
new file mode 100644
index 000000000..160c51f85
--- /dev/null
+++ b/packages/supacloud-lite/scripts/subprocess.ts
@@ -0,0 +1,13 @@
+/**
+ * Bun 1.3.14 stops polling Windows IOCP when only a subprocess exit is pending.
+ * Remove this compatibility hold after the stable runtime includes oven-sh/bun#34478.
+ */
+export async function withWindowsSubprocessRef<T>(operation: () => Promise<T>): Promise<T> {
+  if (process.platform !== 'win32') return await operation()
+  const eventLoopRef = setInterval(() => {}, 1000)
+  try {
+    return await operation()
+  } finally {
+    clearInterval(eventLoopRef)
+  }
+}
diff --git a/packages/supacloud-lite/test/cli-shutdown.test.ts b/packages/supacloud-lite/test/cli-shutdown.test.ts
index e237c7ffd..8762d92bc 100644
--- a/packages/supacloud-lite/test/cli-shutdown.test.ts
+++ b/packages/supacloud-lite/test/cli-shutdown.test.ts
@@ -4,6 +4,7 @@ import { access, mkdtemp, rm } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join, resolve } from 'node:path'
 import { waitForShutdown } from '../src/shutdown.js'
+import { withWindowsSubprocessRef } from '../scripts/subprocess.js'
 
 const cliPath = resolve(import.meta.dir, '../src/cli.ts')
 
@@ -109,11 +110,11 @@ async function runCli(projectDir: string, command: string[]) {
     stdout: 'pipe',
     stderr: 'pipe',
   })
-  const [exitCode, stdout, stderr] = await Promise.all([
+  const [exitCode, stdout, stderr] = await withWindowsSubprocessRef(() => Promise.all([
     processHandle.exited,
     new Response(processHandle.stdout).text(),
     new Response(processHandle.stderr).text(),
-  ])
+  ]))
   return { exitCode, stdout, stderr, durationMs: performance.now() - startedAt }
 }
 
@@ -123,7 +124,7 @@ async function stopCli(cliRun: ReturnType<typeof startCli>, signal: NodeJS.Signa
   } catch (error) {
     if ((error as NodeJS.ErrnoException).code !== 'ESRCH') throw error
   }
-  return await cliRun.processHandle.exited
+  return await withWindowsSubprocessRef(() => cliRun.processHandle.exited)
 }
 
 async function assertShutdownHandlerClosesProject(signal: NodeJS.Signals): Promise<void> {
diff --git a/packages/supacloud-lite/test/snapshot.test.ts b/packages/supacloud-lite/test/snapshot.test.ts
index c8d9ee7d1..063d4e629 100644
--- a/packages/supacloud-lite/test/snapshot.test.ts
+++ b/packages/supacloud-lite/test/snapshot.test.ts
@@ -1,9 +1,10 @@
 import { afterEach, describe, expect, test } from 'bun:test'
-import { mkdir, mkdtemp, readFile, readdir, rm, stat, writeFile } from 'node:fs/promises'
+import { access, mkdir, mkdtemp, readFile, readdir, rm, stat, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import { ensureProjectSecrets, resolveProjectPaths } from '../src/project-runtime.js'
 import { createSnapshot, restoreSnapshot } from '../src/snapshot.js'
+import { withWindowsSubprocessRef } from '../scripts/subprocess.js'
 import { createSymlinkIfPermitted } from './support/symlink.js'
 
 const temporaryDirectories: string[] = []
@@ -155,6 +156,10 @@ describe('Lite snapshots', () => {
 
     const status = await runCli(['status', '--project-dir', projectDir])
     expect(status).toContain('20260728000000')
+
+    const lockPath = `${resolveProjectPaths({ projectDir }).dataDir!}.supacloud-lite.lock`
+    await expect(access(lockPath)).rejects.toMatchObject({ code: 'ENOENT' })
+    expect(await runCli(['status', '--project-dir', projectDir])).toContain('20260728000000')
   })
 })
 
@@ -172,11 +177,13 @@ async function runCli(args: string[]): Promise<string> {
     stderr: 'pipe',
     env: process.env,
   })
-  const [exitCode, stdout, stderr] = await Promise.all([
-    processHandle.exited,
-    new Response(processHandle.stdout).text(),
-    new Response(processHandle.stderr).text(),
-  ])
-  if (exitCode !== 0) throw new Error(`CLI failed (${exitCode}): ${stderr || stdout}`)
-  return stdout
+  return await withWindowsSubprocessRef(async () => {
+    const [exitCode, stdout, stderr] = await Promise.all([
+      processHandle.exited,
+      new Response(processHandle.stdout).text(),
+      new Response(processHandle.stderr).text(),
+    ])
+    if (exitCode !== 0) throw new Error(`CLI failed (${exitCode}): ${stderr || stdout}`)
+    return stdout
+  })
 }