last test

Author: Tchoupinax

src/resolve.ts

@@ -543,6 +543,9 @@ function resolveProperties(
             )
           }
         }
+      } else {
+        // No index signature found and no JSDoc tag - default to false (no additional properties allowed)
+        result.additionalProperties = false
       }
     }
     return result
@@ -798,6 +801,9 @@ function resolveObjectType(
     // Override additionalProperties if JSDoc tag is set
     if (additionalPropertiesFromJSDoc !== undefined) {
       propertiesResult.additionalProperties = additionalPropertiesFromJSDoc
+    } else if (propertiesResult.additionalProperties === undefined) {
+      // If no JSDoc tag and no index signature, default to false
+      propertiesResult.additionalProperties = false
     }
     return {
       type: 'object',

src/runtime/validator.ts

@@ -549,6 +549,7 @@ function validateAndParseValueAgainstSchema(
       key => propertyNames.includes(key) === false
     )
     if (
+      parentType !== 'allOf' &&
       (features?.enableThrowOnUnexpectedAdditionalData ||
         features?.enableLogUnexpectedAdditionalData) &&
       currentSchema.additionalProperties === false