diff --git a/scripts/_smoke-utils.mjs b/scripts/_smoke-utils.mjs
new file mode 100644
index 0000000..89df933
--- /dev/null
+++ b/scripts/_smoke-utils.mjs
@@ -0,0 +1,18 @@
+export function readStream(stream) {
+    return new Promise((resolve, reject) => {
+        let output = ''
+        stream.setEncoding('utf8')
+        stream.on('data', chunk => {
+            output += chunk
+        })
+        stream.on('error', reject)
+        stream.on('end', () => resolve(output))
+    })
+}
+
+export function waitForExit(child) {
+    return new Promise((resolve, reject) => {
+        child.on('error', reject)
+        child.on('exit', code => resolve(code ?? 1))
+    })
+}
diff --git a/scripts/package-smoke.mjs b/scripts/package-smoke.mjs
index 68aeaf9..ed4a914 100644
--- a/scripts/package-smoke.mjs
+++ b/scripts/package-smoke.mjs
@@ -9,6 +9,7 @@ import {
 } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join, resolve } from 'node:path'
+import { readStream, waitForExit } from './_smoke-utils.mjs'
 
 const packageBinName = 'konteks-cli'
 const manager = process.argv[2]
@@ -172,23 +173,3 @@ async function run(command, args, options = { isolatedHome: true }) {
         output: `${stdout}\n${stderr}`.trim(),
     }
 }
-
-function readStream(stream) {
-    return new Promise((resolve, reject) => {
-        let output = ''
-
-        stream.setEncoding('utf8')
-        stream.on('data', chunk => {
-            output += chunk
-        })
-        stream.on('error', reject)
-        stream.on('end', () => resolve(output))
-    })
-}
-
-function waitForExit(child) {
-    return new Promise((resolve, reject) => {
-        child.on('error', reject)
-        child.on('exit', code => resolve(code ?? 1))
-    })
-}
diff --git a/scripts/runtime-smoke.mjs b/scripts/runtime-smoke.mjs
index 421766c..b3660a0 100644
--- a/scripts/runtime-smoke.mjs
+++ b/scripts/runtime-smoke.mjs
@@ -2,6 +2,7 @@ import { spawn } from 'node:child_process'
 import { mkdir, mkdtemp, rm } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
+import { readStream, waitForExit } from './_smoke-utils.mjs'
 
 const runtime = process.argv[2]
 const supportedRuntimes = new Set(['bun', 'node'])
@@ -115,23 +116,3 @@ async function runCli(args) {
         await rm(homeDir, { force: true, recursive: true })
     }
 }
-
-function readStream(stream) {
-    return new Promise((resolve, reject) => {
-        let output = ''
-
-        stream.setEncoding('utf8')
-        stream.on('data', chunk => {
-            output += chunk
-        })
-        stream.on('error', reject)
-        stream.on('end', () => resolve(output))
-    })
-}
-
-function waitForExit(child) {
-    return new Promise((resolve, reject) => {
-        child.on('error', reject)
-        child.on('exit', code => resolve(code ?? 1))
-    })
-}