diff --git a/TODO b/TODO
index 7f9986e..189135f 100644
--- a/TODO
+++ b/TODO
@@ -47,3 +47,14 @@ Description: [Detailed explanation]
 
 ## Issues
 
+ID: 1
+Type: feature
+Title: implement KMP algorithm for string searching
+Status: open
+Priority: high
+Created: 2025-05-03
+Description: Implement the Knuth-Morris-Pratt algorithm for string searching.
+             I require this for matching RFC 9112 boundaries of entities against
+             a circular buffer.
+
+---