Fixed it

.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+    "configurations": [
+        {
+            "type": "cppvsdbg",
+            "request": "launch",
+            "name": "Debug Sandbox Shared",
+            "program": "${workspaceFolder}/builddir/Sandbox/sandbox_shared.exe",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            "preLaunchTask": "build"
+        },
+        {
+            "type": "cppvsdbg",
+            "request": "launch",
+            "name": "Debug Sandbox Static",
+            "program": "${workspaceFolder}/builddir/Sandbox/sandbox_static.exe",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            "preLaunchTask": "build"
+        },
+    ]
+}

.vscode/settings.json

@@ -1,5 +1,6 @@
 {
     "C_Cpp.default.compileCommands": "d:\\FluxEngine\\builddir/compile_commands.json",
     "C_Cpp.default.configurationProvider": "mesonbuild.mesonbuild",
-    "cmake.ignoreCMakeListsMissing": true
+    "cmake.ignoreCMakeListsMissing": true,
+    "C_Cpp.errorSquiggles": "enabled"
 }

.vscode/tasks.json

@@ -0,0 +1,24 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "setup",
+            "type": "shell",
+            "command": "meson setup builddir",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+        },
+        {
+            "label": "build",
+            "type": "shell",
+            "command": "meson compile -C builddir",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "dependsOn": "setup",
+        }
+    ]
+}