diff --git a/repository/STON-Core.package/Object.extension/instance/stonEncoded.st b/repository/STON-Core.package/Object.extension/instance/stonEncoded.st
new file mode 100644
index 0000000..ebf8494
--- /dev/null
+++ b/repository/STON-Core.package/Object.extension/instance/stonEncoded.st
@@ -0,0 +1,5 @@
+*STON-Core
+stonEncoded
+	"Encode me into an STON textual representation"
+
+	^ STON toStringPretty: self
\ No newline at end of file
diff --git a/repository/STON-Core.package/String.extension/instance/stonDecoded.st b/repository/STON-Core.package/String.extension/instance/stonDecoded.st
new file mode 100644
index 0000000..20fbdbf
--- /dev/null
+++ b/repository/STON-Core.package/String.extension/instance/stonDecoded.st
@@ -0,0 +1,5 @@
+*STON-Core
+stonDecoded
+	"Decode me as an STON textual representation"
+	
+	^ STON fromString: self
\ No newline at end of file