diff --git a/lib/resolve.ml b/lib/resolve.ml
index 51c37abb..7344e5f1 100644
--- a/lib/resolve.ml
+++ b/lib/resolve.ml
@@ -64,6 +64,7 @@ let create_context () : context =
   (* Numeric coercions and math *)
   def "int"; def "float";
   def "sqrt"; def "cbrt"; def "pow_float"; def "floor"; def "ceil"; def "round";
+  def "trunc";
   def "abs"; def "max"; def "min";
   def "sin"; def "cos"; def "tan"; def "atan"; def "atan2";
   def "exp"; def "log"; def "log10"; def "log2";
diff --git a/stdlib/io.affine b/stdlib/io.affine
index 307feb60..b71ad3ae 100644
--- a/stdlib/io.affine
+++ b/stdlib/io.affine
@@ -20,6 +20,9 @@
 //   show(value)             -> String
 //   time_now()              -> Float              (CPU time in seconds)
 
+// Cross-module imports (ADR-011: explicit `use module::{...}`)
+use string::{ split };
+
 // ============================================================================
 // Console Output
 // ============================================================================
diff --git a/stdlib/string.affine b/stdlib/string.affine
index 06976be6..e3235625 100644
--- a/stdlib/string.affine
+++ b/stdlib/string.affine
@@ -116,7 +116,7 @@ fn repeat(s: String, n: Int) -> String {
 }
 
 /// Split string by a delimiter
-fn split(s: String, delimiter: String) -> [String] {
+pub fn split(s: String, delimiter: String) -> [String] {
   let slen = len(s);
   let dlen = len(delimiter);