diff --git a/Android/ship-companion.sh b/Android/ship-companion.sh
index 3c7f62d7..cd32646c 100755
--- a/Android/ship-companion.sh
+++ b/Android/ship-companion.sh
@@ -9,6 +9,10 @@
 #
 #   ./Android/ship-companion.sh
 #
+# The actual build/sign/verify/stage is done by scripts/publish-companion-apk.sh
+# (single source of truth, shared with the pre-push hook). It does a CLEAN build,
+# forces v1+v2+v3 signing, and ABORTS if any signature scheme is missing — so a
+# broken or v2-only APK can never be shipped.
 set -euo pipefail
 
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
@@ -17,25 +21,15 @@ cd "$ROOT"
 export JAVA_HOME="${JAVA_HOME:-/opt/homebrew/opt/openjdk@17}"
 export ANDROID_HOME="${ANDROID_HOME:-$HOME/Library/Android/sdk}"
 
-APK="Android/app/build/outputs/apk/debug/app-debug.apk"
 DEST="neode-ui/public/packages/archipelago-companion.apk"
-OLD_ZIP="neode-ui/public/packages/archipelago-companion.apk.zip"
 
-echo "==> Building debug APK"
-( cd Android && ./gradlew :app:assembleDebug --console=plain -q )
-[ -f "$APK" ] || { echo "ERROR: APK not found at $APK" >&2; exit 1; }
+echo "==> Building + signing + verifying companion APK"
+bash scripts/publish-companion-apk.sh
 
-echo "==> Publishing -> $DEST"
-mkdir -p "$(dirname "$DEST")"
-cp "$APK" "$DEST"
-# Drop the legacy zipped artifact so the served download is the raw APK only.
-if [ -f "$OLD_ZIP" ]; then
-  git rm -q --ignore-unmatch "$OLD_ZIP" 2>/dev/null || rm -f "$OLD_ZIP"
-fi
+[ -f "$DEST" ] || { echo "ERROR: served APK not found at $DEST" >&2; exit 1; }
 
-git add "$DEST"
-if git diff --cached --quiet; then
-  echo "==> Nothing to commit (working tree + APK unchanged)"
+if git diff --cached --quiet -- "$DEST"; then
+  echo "==> Nothing to commit (APK unchanged)"
 else
   git commit -q -m "chore(android): update companion apk download"
   echo "==> Committed"
diff --git a/neode-ui/public/packages/archipelago-companion.apk b/neode-ui/public/packages/archipelago-companion.apk
index c364b143..eee04860 100644
Binary files a/neode-ui/public/packages/archipelago-companion.apk and b/neode-ui/public/packages/archipelago-companion.apk differ
diff --git a/scripts/publish-companion-apk.sh b/scripts/publish-companion-apk.sh
index 85c4dcab..11e504e9 100755
--- a/scripts/publish-companion-apk.sh
+++ b/scripts/publish-companion-apk.sh
@@ -4,6 +4,16 @@
 # can install it straight from the link — no unzip step).
 #
 # Run manually, or automatically via the pre-push hook (.githooks/pre-push).
+#
+# Hardened (2026-06-26) so a broken APK can never ship again:
+#   1. Aborts on stray resource dirs whose names contain spaces (these break a
+#      clean build with "Invalid resource directory name"). Empty ones — junk
+#      left by some icon-export tools — are auto-removed; non-empty ones error.
+#   2. Always a CLEAN build (incremental builds masked the bad resource dirs).
+#   3. Forces v1 + v2 + v3 signing with zipalign + apksigner. AGP's
+#      `enableV1Signing = true` flag is silently ignored for minSdk>=24, which
+#      shipped a v2-only APK that some OEM installers reject ("App not installed").
+#   4. VERIFIES all three schemes and ABORTS if any is missing — no silent ship.
 set -euo pipefail
 
 ROOT="$(git rev-parse --show-toplevel)"
@@ -17,16 +27,63 @@ if [ ! -x "$JAVA/bin/java" ] || [ ! -d "$SDK" ]; then
   echo "  (set JAVA_HOME and ANDROID_HOME to build the companion APK)" >&2
   exit 0
 fi
+export JAVA_HOME="$JAVA"
+export PATH="$JAVA/bin:$PATH"
 
-echo "publish-companion-apk: building debug APK…" >&2
-( cd Android && JAVA_HOME="$JAVA" ANDROID_HOME="$SDK" ./gradlew -q :app:assembleDebug )
-
+RES="Android/app/src/main/res"
 APK="Android/app/build/outputs/apk/debug/app-debug.apk"
+SIGNED="Android/app/build/outputs/apk/debug/app-debug-signed.apk"
 DEST="neode-ui/public/packages/archipelago-companion.apk"
 OLD_ZIP="neode-ui/public/packages/archipelago-companion.apk.zip"
-mkdir -p "$(dirname "$DEST")"
+KS="Android/app/debug.keystore"
 
-cp "$APK" "$DEST"
+# 1. Guard against resource dirs with spaces (Android forbids them; a clean
+#    build aborts on them). Empty ones are removed; non-empty ones are fatal.
+while IFS= read -r d; do
+  [ -n "$d" ] || continue
+  if [ -n "$(ls -A "$d" 2>/dev/null)" ]; then
+    echo "publish-companion-apk: ERROR — resource dir with a space is not empty:" >&2
+    echo "    $d" >&2
+    echo "  Rename it (Android resource dir names cannot contain spaces)." >&2
+    exit 1
+  fi
+  rmdir "$d" && echo "publish-companion-apk: removed stray empty resource dir: $d" >&2
+done < <(find "$RES" -type d -name '* *' 2>/dev/null)
+
+# 2. Clean build.
+echo "publish-companion-apk: clean build of debug APK…" >&2
+( cd Android && ./gradlew -q --console=plain :app:clean :app:assembleDebug )
+[ -f "$APK" ] || { echo "publish-companion-apk: ERROR — APK not produced at $APK" >&2; exit 1; }
+
+# 3. Force v1 + v2 + v3 signing (AGP's enableV1Signing flag is ignored here).
+BT="$(ls -d "$SDK"/build-tools/*/ | sort -V | tail -1)"
+ZIPALIGN="${BT}zipalign"; APKSIGNER="${BT}apksigner"
+[ -x "$ZIPALIGN" ] && [ -x "$APKSIGNER" ] || {
+  echo "publish-companion-apk: ERROR — zipalign/apksigner not found under $BT" >&2; exit 1; }
+[ -f "$KS" ] || { echo "publish-companion-apk: ERROR — keystore missing at $KS" >&2; exit 1; }
+
+echo "publish-companion-apk: zipalign + sign (v1+v2+v3)…" >&2
+"$ZIPALIGN" -p -f 4 "$APK" "$SIGNED"
+"$APKSIGNER" sign \
+  --ks "$KS" --ks-pass pass:android \
+  --ks-key-alias androiddebugkey --key-pass pass:android \
+  --v1-signing-enabled true --v2-signing-enabled true --v3-signing-enabled true \
+  "$SIGNED"
+
+# 4. Verify all three schemes (min-sdk 21 forces the v1 path to be exercised).
+VERIFY="$("$APKSIGNER" verify -v --min-sdk-version 21 "$SIGNED" 2>&1)"
+for scheme in "v1 scheme" "v2 scheme" "v3 scheme"; do
+  if ! printf '%s\n' "$VERIFY" | grep -iq "$scheme.*: true"; then
+    echo "publish-companion-apk: ERROR — $scheme NOT present after signing. Aborting." >&2
+    printf '%s\n' "$VERIFY" | grep -iE "scheme" >&2
+    exit 1
+  fi
+done
+echo "publish-companion-apk: verified v1 + v2 + v3 signatures." >&2
+
+# 5. Publish.
+mkdir -p "$(dirname "$DEST")"
+cp "$SIGNED" "$DEST"
 
 # Drop the legacy zipped artifact so the served download is the raw APK only.
 if [ -f "$OLD_ZIP" ]; then