checkpointing, heavy dev

Makefile

@@ -13,7 +13,7 @@ fmt:
 
 fmt-check:
 	@echo "Checking formatting..."
-	@test -z "$$(gofmt -l .)" || (echo "Files need formatting. Run 'make fmt'" && gofmt -l . && exit 1)
+	@test -z "$$(gofmt -l . | grep -v '^vendor/')" || (echo "Files need formatting. Run 'make fmt'" && gofmt -l . | grep -v '^vendor/' && exit 1)
 
 lint:
 	golangci-lint run
@@ -39,4 +39,25 @@ run-daemon: build
 
 deps:
 	go mod download
-	go mod tidy
+	go mod tidy
+
+# VM Testing
+.PHONY: vmtest
+
+vmtest:
+	cd test/qemu-ubuntu-test && ./run-qemu.sh
+
+# Debug build
+.PHONY: debug
+
+debug:
+	go build -gcflags="all=-N -l" -o hdmistat-debug ./cmd/hdmistat
+	@echo "Debug build complete: hdmistat-debug"
+	@echo ""
+	@echo "Debug features:"
+	@echo "  - SIGUSR1 dumps all goroutine stack traces"
+	@echo "  - Built with debug symbols (-N -l)"
+	@echo ""
+	@echo "To debug a hang:"
+	@echo "  kill -USR1 <pid>    # Dump goroutines"
+	@echo "  kill -QUIT <pid>    # Also dumps goroutines (Go default)"