Gate Windows ARM64 packaging explicitly

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build test fmt clippy release-check 1.0-check reconnect-check hostile-network-check persistence-check package-check install package-release package-release-linux package-release-windows publish-release bench-report bench-local bench-local-json bench-docker-ssh bench-docker-mosh fuzz-smoke fuzz-deep soak-local tui-harness
+.PHONY: build test fmt clippy release-check 1.0-check reconnect-check hostile-network-check persistence-check package-check install package-release package-release-linux package-release-windows package-release-windows-arm64 publish-release bench-report bench-local bench-local-json bench-docker-ssh bench-docker-mosh fuzz-smoke fuzz-deep soak-local tui-harness
 
 build:
 	cargo build --release
@@ -36,9 +36,19 @@ persistence-check:
 package-check:
 	$(MAKE) package-release-linux
 	$(MAKE) package-release-windows
-	sh scripts/verify-release-artifacts.sh \
-		target/dosh-release/dosh-linux-x86_64.tar.gz \
-		target/dosh-release/dosh-windows-x86_64.zip
+	if command -v aarch64-w64-mingw32-clang >/dev/null 2>&1; then \
+		$(MAKE) package-release-windows-arm64; \
+		sh scripts/verify-release-artifacts.sh \
+			target/dosh-release/dosh-linux-x86_64.tar.gz \
+			target/dosh-release/dosh-windows-x86_64.zip \
+			target/dosh-release/dosh-windows-aarch64.zip; \
+	else \
+		echo "warning: aarch64-w64-mingw32-clang not found; checking Windows ARM64 build without packaging"; \
+		cargo check --target aarch64-pc-windows-gnullvm --all-targets; \
+		sh scripts/verify-release-artifacts.sh \
+			target/dosh-release/dosh-linux-x86_64.tar.gz \
+			target/dosh-release/dosh-windows-x86_64.zip; \
+	fi
 
 install:
 	sh install.sh --from-current
@@ -52,6 +62,9 @@ package-release-linux:
 package-release-windows:
 	DOSH_PACKAGE_OS=windows DOSH_PACKAGE_ARCH=x86_64 DOSH_PACKAGE_TARGET=x86_64-pc-windows-gnu sh scripts/package-release.sh
 
+package-release-windows-arm64:
+	DOSH_PACKAGE_OS=windows DOSH_PACKAGE_ARCH=aarch64 DOSH_PACKAGE_TARGET=aarch64-pc-windows-gnullvm sh scripts/package-release.sh
+
 publish-release:
 	sh scripts/publish-gitea-release.sh
 

scripts/package-release.sh

@@ -62,6 +62,24 @@ else
   release_dir="target/release"
 fi
 
+need_target_linker() {
+  case "${target:-}" in
+    x86_64-pc-windows-gnu)
+      if ! command -v x86_64-w64-mingw32-gcc >/dev/null 2>&1 \
+        && ! command -v x86_64-w64-mingw32-clang >/dev/null 2>&1; then
+        echo "windows/x86_64 packaging requires x86_64-w64-mingw32-gcc or x86_64-w64-mingw32-clang" >&2
+        exit 1
+      fi
+      ;;
+    aarch64-pc-windows-gnullvm)
+      if ! command -v aarch64-w64-mingw32-clang >/dev/null 2>&1; then
+        echo "windows/aarch64 packaging requires aarch64-w64-mingw32-clang" >&2
+        exit 1
+      fi
+      ;;
+  esac
+}
+
 if command -v git >/dev/null 2>&1 && git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   if [ -z "${DOSH_BUILD_GIT_HASH:-}" ]; then
     export DOSH_BUILD_GIT_HASH="$(git rev-parse --short=12 HEAD)"
@@ -78,6 +96,8 @@ if command -v git >/dev/null 2>&1 && git rev-parse --is-inside-work-tree >/dev/n
   fi
 fi
 
+need_target_linker
+
 if [ "$os" = "windows" ]; then
   if [ -n "$target" ]; then
     cargo build --release --target "$target" --bin dosh-client --bin dosh-bench