diff --git a/src/prelude/index.ts b/src/prelude/index.ts
index 78c1355..19a687a 100644
--- a/src/prelude/index.ts
+++ b/src/prelude/index.ts
@@ -161,6 +161,19 @@ export const globals = {
     return list
   },
 
+  into: (value: unknown, type: Value['type']) => {
+    if (type === 'number') {
+      const num = Number(value)
+      if (isNaN(num)) throw new Error(`into: cannot convert ${value} to number`)
+      return num
+    } else if (type === 'string') {
+      return String(value)
+    } else if (type === 'boolean') {
+      return Boolean(value)
+    } else {
+      throw new Error(`into: unsupported target type ${type}`)
+    }
+  },
 }
 
 export const colors = {