validate using jsonschema, not manually

schemas/recipe.json

@@ -0,0 +1,36 @@
+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$id": "https://example.com/recipe.json",
+    "title": "Recipe",
+    "description": "Recipe",
+    "type": "object",
+    "required": [ "title" ],
+    "additionalProperties": false,
+    "properties": {
+        "title": { "type": "string" },
+        "ingredients": {
+            "type": "array",
+            "items": {
+                "$id": "https://example.com/ingredient.json",
+                "type": "object",
+                "additionalProperties": false,
+                "required": [ "name" ],
+                "properties": {
+                    "name": { "type": "string" },
+                    "amount": { "type": "number" },
+                    "unit": { "type": "string" },
+                    "or": { "items": { "$ref": "/ingredient.json" } },
+                    "note": { "type": "string" }
+                }
+            }
+        },
+        "steps": {
+            "type": "array",
+            "items": { "type": "string" }
+        },
+        "parts": {
+            "type": "array",
+            "items": { "$ref": "/recipe.json" }
+        }
+    }
+}