diff --git a/codex-rs/home/src/lib.rs b/codex-rs/home/src/lib.rs
index 7688044f81..9abafa03cb 100644
--- a/codex-rs/home/src/lib.rs
+++ b/codex-rs/home/src/lib.rs
@@ -1,3 +1,5 @@
+//! Global instruction contributor backed by files in the Codex home directory.
+
 use std::io;
 
 use codex_extension_api::GlobalInstruction;