diff --git a/packages/core/src/validation.ts b/packages/core/src/validation.ts
index fd9c20e8..9e699751 100644
--- a/packages/core/src/validation.ts
+++ b/packages/core/src/validation.ts
@@ -153,7 +153,7 @@ export const builtInValidationFunctions: Record<string, ValidationFunction> = {
    */
   numeric: (value: unknown) => {
     if (typeof value === "number") return !isNaN(value);
-    if (typeof value === "string") return !isNaN(parseFloat(value));
+    if (typeof value === "string") return !isNaN(Number(value)) && isFinite(Number(value));
     return false;
   },
 
diff --git a/packages/directives/src/truncate.ts b/packages/directives/src/truncate.ts
index 822ce477..05fd7c6d 100644
--- a/packages/directives/src/truncate.ts
+++ b/packages/directives/src/truncate.ts
@@ -16,6 +16,6 @@ export const truncateDirective = defineDirective({
     const suffix = raw.suffix ?? "...";
 
     if (text.length <= maxLength) return text;
-    return text.slice(0, maxLength) + suffix;
+    return text.slice(0, maxLength - suffix.length) + suffix;
   },
 });