diff --git a/docs/v4-skills-mechanism.md b/docs/v4-skills-mechanism.md
index c527b54..a49d7d7 100644
--- a/docs/v4-skills-mechanism.md
+++ b/docs/v4-skills-mechanism.md
@@ -391,3 +391,5 @@ The essence of knowledge externalization is **turning implicit knowledge into ex
 ---
 
 **Tools let models act. Skills let models know how.**
+
+[← v3](./v3-subagent-mechanism.md) | [Back to README](../README.md) | [v0 →](./v0-bash-is-all-you-need.md)