diff --git a/docs/tools/capability-cookbook.md b/docs/tools/capability-cookbook.md
index 3746fc02529..5c335f672e4 100644
--- a/docs/tools/capability-cookbook.md
+++ b/docs/tools/capability-cookbook.md
@@ -69,7 +69,7 @@ Feature/channel plugin:
 - calls `api.runtime.*` or the matching `plugin-sdk/*-runtime` helper
 - never calls a vendor implementation directly
 
-## Provider and Harness Seams
+## Provider and harness seams
 
 Use provider hooks when the behavior belongs to the model provider contract
 rather than the generic agent loop. Examples include provider-specific request