.

data/fz/advancements/config/sneak.json

@@ -1,3 +1,14 @@
 {
-    
+    "criteria": {
+        "sneak": {
+            "trigger": "minecraft:tick",
+            "conditions": {
+                "player": {
+                    "flags": {
+                        "is_sneaking": true
+                    }
+                }
+            }
+        }
+    }
 }