diff --git a/docs/Modders/Type-checking.md b/docs/Modders/Type-checking.md
index 84b4c7818a..1c48e030fc 100644
--- a/docs/Modders/Type-checking.md
+++ b/docs/Modders/Type-checking.md
@@ -42,6 +42,12 @@ Tada! Now Android Studio will recognize all Buildings.json files as belonging to
             ],
             "url": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/nations.json"
         },
+        {
+            "fileMatch": [
+              "*/TileImprovements.json"
+            ],
+            "url": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/tileImprovements.json"
+        },
         {
             "fileMatch": [
               "*/TileImprovements.json"
diff --git a/docs/Modders/schemas/techs.json b/docs/Modders/schemas/techs.json
new file mode 100644
index 0000000000..76802656ea
--- /dev/null
+++ b/docs/Modders/schemas/techs.json
@@ -0,0 +1,46 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "type": "array",
+  "items": {
+      "type": "object",
+      "properties": {
+          "columnNumber": { "type": "integer" },
+          "era": { "type": "string" },
+          "techCost": { "type": "integer" },
+          "buildingCost": { "type": "integer" },
+          "wonderCost": { "type": "integer" },
+          "techs": {
+              "type": "array",
+              "items": {
+                  "type": "object",
+                  "properties": {
+                      "name":  { "type": "string" },
+                      "row":  { "type": "integer" },
+                      "cost":  {
+                          "type": "integer",
+                          "description": "Science cost of this tech - overrides the column techCost"
+                      },
+                      "uniques":  { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/uniques.json" },
+                      "prerequisites": {
+                          "type": "array",
+                          "items": { "type": "string" },
+                          "uniqueItems": true
+                      },
+                      "civilopediaText": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/civilopediaText.json" },
+                      "quote":  { "type": "string" }
+                  },
+                  "required": ["name", "row"],
+                  "additionalProperties": false
+              }
+          },
+
+          "uniques": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/uniques.json" },
+
+          "civilopediaText": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/civilopediaText.json" }
+      },
+      "required": [
+          "columnNumber", "era"
+      ],
+      "additionalProperties": false
+  }
+}