diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c6e08fd..20c44f3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,3 +21,7 @@ jobs:
       - uses: actions/checkout@v7
       - run: swift --version
       - run: swift build
+      # CI links a newer SDK than local SwiftPM builds record, which can change AppKit behavior
+      # (v0.1.0 crashed at launch only when built here), so launch what CI built.
+      - name: Launch smoke test
+        run: ./scripts/smoke-test.sh "$(swift build --show-bin-path)/MacDirStat"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0e5d42e..306a884 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -45,6 +45,9 @@ jobs:
       - name: Build and sign
         run: UNIVERSAL=1 VERSION="${GITHUB_REF_NAME#v}" ./scripts/build-app.sh
 
+      - name: Launch smoke test
+        run: ./scripts/smoke-test.sh .build/MacDirStat.app/Contents/MacOS/MacDirStat
+
       - name: Notarize
         env:
           NOTARY_API_KEY: ${{ secrets.NOTARY_API_KEY }}
diff --git a/scripts/smoke-test.sh b/scripts/smoke-test.sh
new file mode 100755
index 0000000..b50d368
--- /dev/null
+++ b/scripts/smoke-test.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+# Launches MacDirStat and fails if it exits within a few seconds, to catch crashes at launch.
+# Usage: scripts/smoke-test.sh PATH_TO_BINARY [SECONDS]
+set -uo pipefail
+
+BINARY="${1:?usage: $0 PATH_TO_BINARY [SECONDS]}"
+WAIT_SECONDS="${2:-10}"
+
+"$BINARY" >/dev/null 2>&1 &
+PID=$!
+sleep "$WAIT_SECONDS"
+
+if kill -0 "$PID" 2>/dev/null; then
+    kill "$PID"
+    echo "MacDirStat was still running after ${WAIT_SECONDS}s"
+else
+    STATUS=0
+    wait "$PID" || STATUS=$?
+    echo "MacDirStat exited during launch with status $STATUS" >&2
+    exit 1
+fi