diff --git a/Cargo.lock b/Cargo.lock
index ed1428ef..0e4b61c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3704,7 +3704,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "block2 0.6.2",
  "eframe",
@@ -3733,7 +3733,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-cli"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "serde_json",
  "solidcraft-engine",
@@ -3742,7 +3742,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-derive"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3751,7 +3751,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-doc"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "log",
  "serde",
@@ -3768,7 +3768,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-engine"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "log",
  "serde",
@@ -3784,7 +3784,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-geom"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "serde",
  "serde_json",
@@ -3793,7 +3793,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-gpu"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "log",
  "naga",
@@ -3806,7 +3806,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-io"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "quick-xml",
  "serde",
@@ -3821,7 +3821,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-kernel"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "log",
  "rayon",
@@ -3839,7 +3839,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-mcp"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "serde_json",
  "solidcraft-engine",
@@ -3847,7 +3847,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-render"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "image",
  "moxcms",
@@ -3860,7 +3860,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-sketch"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "serde",
  "serde_json",
@@ -3871,7 +3871,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-ui-egui"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "egui",
  "egui-wgpu",
@@ -3892,7 +3892,7 @@ dependencies = [
 
 [[package]]
 name = "solidcraft-web"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "eframe",
  "egui",
@@ -5381,7 +5381,7 @@ checksum = "e450f9b2ed1dff33c94c12589a87338689467b9c4f5d8a5710bd09a847d2c8a7"
 
 [[package]]
 name = "xtask"
-version = "0.12.0"
+version = "0.13.0"
 dependencies = [
  "serde_json",
  "sha2",
diff --git a/Cargo.toml b/Cargo.toml
index c3af526a..a35256e3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ members = ["crates/*", "apps/*", "xtask"]
 exclude = ["vendor"]
 
 [workspace.package]
-version = "0.12.0"
+version = "0.13.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"
diff --git a/apps/solidcraft/src/native_frame.rs b/apps/solidcraft/src/native_frame.rs
index 9bac6d4e..d6fb5117 100644
--- a/apps/solidcraft/src/native_frame.rs
+++ b/apps/solidcraft/src/native_frame.rs
@@ -48,11 +48,13 @@ pub fn install(window: &impl HasWindowHandle) -> bool {
     // SAFETY: `hwnd` is the live window eframe just created on this thread; `frame_proc` has the
     // WNDPROC signature and stays valid for the life of the process. SetWindowLongPtrW returns
     // the previous procedure, which `frame_proc` calls for every other message.
-    let previous = unsafe { SetWindowLongPtrW(hwnd, GWLP_WNDPROC, frame_proc as *const () as isize) };
+    let previous = unsafe { SetWindowLongPtrW(hwnd, GWLP_WNDPROC, frame_proc as *const () as isize as _) };
+    // `as _`: on 32-bit Windows SetWindowLongPtrW is SetWindowLongW, which takes and
+    // returns i32.
     if previous == 0 {
         return false;
     }
-    PREVIOUS.store(previous, Ordering::SeqCst);
+    PREVIOUS.store(previous as _, Ordering::SeqCst);
     true
 }
 
@@ -97,7 +99,7 @@ unsafe extern "system" fn frame_proc(hwnd: HWND, msg: u32, wparam: WPARAM, lpara
             // Hand the window back to winit's procedure for its last message.
             if prev.is_some() {
                 // SAFETY: restores the procedure this window had before `install`.
-                unsafe { SetWindowLongPtrW(hwnd, GWLP_WNDPROC, PREVIOUS.load(Ordering::SeqCst)) };
+                unsafe { SetWindowLongPtrW(hwnd, GWLP_WNDPROC, PREVIOUS.load(Ordering::SeqCst) as _) };
             }
             call_previous()
         }
diff --git a/packaging/macos/package.sh b/packaging/macos/package.sh
index 06881f4e..08112bb9 100755
--- a/packaging/macos/package.sh
+++ b/packaging/macos/package.sh
@@ -73,7 +73,9 @@ copy_docs "$APP/Contents/Resources/Licenses"
 sed -e "s/@VERSION@/$VERSION/g" -e "s/@SHORT_VERSION@/$SHORT_VERSION/g" "$ROOT/assets/platforms/macos/Info.plist.in" >"$APP/Contents/Info.plist"
 plutil -lint "$APP/Contents/Info.plist"
 printf 'APPL????' >"$APP/Contents/PkgInfo"
-# Ad-hoc signature over the whole bundle (Apple silicon refuses unsigned code).
+# Ad-hoc signature over the whole bundle (Apple silicon refuses unsigned code). Nested code is
+# signed first: the bundle signature refuses an unsigned helper in Contents/MacOS.
+codesign --force --sign - --timestamp=none --identifier "$MACOS_BUNDLE_ID-cli" "$APP/Contents/MacOS/solidcraft-cli"
 codesign --force --sign - --timestamp=none "$APP"
 codesign --verify --strict --deep --verbose=2 "$APP"
 test -x "$APP/Contents/MacOS/solidcraft-cli" || { echo "solidcraft-cli is missing from $APP" >&2; exit 1; }