diff --git a/src/schemas/json/jsconfig.json b/src/schemas/json/jsconfig.json
index 8240481a925..06903b81217 100644
--- a/src/schemas/json/jsconfig.json
+++ b/src/schemas/json/jsconfig.json
@@ -1196,6 +1196,20 @@
               "description": "Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.",
               "type": ["boolean", "null"],
               "markdownDescription": "Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.\n\nSee more: https://www.typescriptlang.org/tsconfig#verbatimModuleSyntax"
+            },
+            "noCheck": {
+              "$comment": "The value of 'null' is UNDOCUMENTED (https://github.com/microsoft/TypeScript/pull/18058).",
+              "description": "Disable full type checking (only critical parse and emit errors will be reported)",
+              "type": ["boolean", "null"],
+              "default": false,
+              "markdownDescription": "Disable full type checking (only critical parse and emit errors will be reported)\n\nSee more: https://www.typescriptlang.org/tsconfig#noCheck"
+            },
+            "isolatedDeclarations": {
+              "$comment": "The value of 'null' is UNDOCUMENTED (https://github.com/microsoft/TypeScript/pull/18058).",
+              "description": "Require sufficient annotation on exports so other tools can trivially generate declaration files.",
+              "type": ["boolean", "null"],
+              "default": false,
+              "markdownDescription": "Require sufficient annotation on exports so other tools can trivially generate declaration files.\n\nSee more: https://www.typescriptlang.org/tsconfig#isolatedDeclarations"
             }
           }
         }
diff --git a/src/schemas/json/tsconfig.json b/src/schemas/json/tsconfig.json
index 707e2c90e9b..dd7242f3112 100644
--- a/src/schemas/json/tsconfig.json
+++ b/src/schemas/json/tsconfig.json
@@ -1205,6 +1205,20 @@
               "description": "Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.",
               "type": ["boolean", "null"],
               "markdownDescription": "Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.\n\nSee more: https://www.typescriptlang.org/tsconfig#verbatimModuleSyntax"
+            },
+            "noCheck": {
+              "$comment": "The value of 'null' is UNDOCUMENTED (https://github.com/microsoft/TypeScript/pull/18058).",
+              "description": "Disable full type checking (only critical parse and emit errors will be reported)",
+              "type": ["boolean", "null"],
+              "default": false,
+              "markdownDescription": "Disable full type checking (only critical parse and emit errors will be reported)\n\nSee more: https://www.typescriptlang.org/tsconfig#noCheck"
+            },
+            "isolatedDeclarations": {
+              "$comment": "The value of 'null' is UNDOCUMENTED (https://github.com/microsoft/TypeScript/pull/18058).",
+              "description": "Require sufficient annotation on exports so other tools can trivially generate declaration files.",
+              "type": ["boolean", "null"],
+              "default": false,
+              "markdownDescription": "Require sufficient annotation on exports so other tools can trivially generate declaration files.\n\nSee more: https://www.typescriptlang.org/tsconfig#isolatedDeclarations"
             }
           }
         }