diff --git a/docs/schema/extra.json b/docs/schema/extra.json
index b67d0ce30..a94da8606 100644
--- a/docs/schema/extra.json
+++ b/docs/schema/extra.json
@@ -214,7 +214,8 @@
                 ]
               }
             ]
-          }
+          },
+          "uniqueItems": true
         }
       },
       "additionalProperties": false,
diff --git a/docs/schema/plugins/blog.json b/docs/schema/plugins/blog.json
index 8ad54ff67..ec7492776 100644
--- a/docs/schema/plugins/blog.json
+++ b/docs/schema/plugins/blog.json
@@ -240,6 +240,7 @@
               "items": {
                 "type": "string"
               },
+              "uniqueItems": true,
               "default": []
             },
             "pagination": {
diff --git a/docs/schema/plugins/external/git-authors.json b/docs/schema/plugins/external/git-authors.json
index 4bf452ab6..a76f3b9e0 100644
--- a/docs/schema/plugins/external/git-authors.json
+++ b/docs/schema/plugins/external/git-authors.json
@@ -27,7 +27,9 @@
               "type": "array",
               "items": {
                 "pattern": "(\\*|\\.md)$"
-              }
+              },
+              "uniqueItems": true,
+              "minItems": 1
             }
           },
           "additionalProperties": false
diff --git a/docs/schema/plugins/search.json b/docs/schema/plugins/search.json
index f99370e31..bbd1641b5 100644
--- a/docs/schema/plugins/search.json
+++ b/docs/schema/plugins/search.json
@@ -36,6 +36,19 @@
               "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-site-search/#+search.separator",
               "type": "string"
             },
+            "pipeline": {
+              "title": "Text processing pipeline for indexing",
+              "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-site-search/#+search.pipeline",
+              "type": "array",
+              "items": {
+                "enum": [
+                  "stemmer",
+                  "stopWordFilter",
+                  "trimmer"
+                ]
+              },
+              "uniqueItems": true
+            },
             "jieba_dict": {
               "title": "Jieba dictionary replacement",
               "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-site-search/#+search.jieba_dict",
diff --git a/docs/schema/plugins/tags.json b/docs/schema/plugins/tags.json
index a62e084fd..541b0fdae 100644
--- a/docs/schema/plugins/tags.json
+++ b/docs/schema/plugins/tags.json
@@ -36,7 +36,8 @@
                   "type": "array",
                   "items": {
                     "type": "string"
-                  }
+                  },
+                  "uniqueItems": true
                 }
               },
               "additionalProperties": false
@@ -59,6 +60,7 @@
               "items": {
                 "type": "string"
               },
+              "uniqueItems": true,
               "default": []
             }
           },