diff --git a/README.md b/README.md
index 167fe1b..60c01f1 100644
--- a/README.md
+++ b/README.md
@@ -203,6 +203,17 @@ This can help debug issues on other's computer.  To get your debug log please do
 1. execute vim command `:lua require("harpoon").logger:show()` and copy the buffer
 1. paste the buffer as part of the bug creation
 
+## Extends
+THIS PART OF THE DOCS NEEDS FILLING OUT
+
+```lua
+local harpoon = require("harpoon");
+local extensions = require("harpoon.extensions");
+
+harpoon:setup()
+harpoon:extend(extensions.builtins.command_on_nav("foo bar"));
+```
+
 ## ⇁ Contribution
 This project is officially open source, not just public source.  If you wish to
 contribute start with an issue and I am totally willing for PRs, but I will be
diff --git a/lua/harpoon/config.lua b/lua/harpoon/config.lua
index b6b61cf..df86d4d 100644
--- a/lua/harpoon/config.lua
+++ b/lua/harpoon/config.lua
@@ -1,3 +1,4 @@
+local Extensions = require("harpoon.extensions")
 local Logger = require("harpoon.logger")
 local Path = require("plenary.path")
 local function normalize_path(buf_name, root)
@@ -129,6 +130,10 @@ function M.get_default_config()
                         list_item.context.col or 0,
                     })
                 end
+
+                Extensions.extensions:emit(Extensions.event_names.NAVIGATE, {
+                    buffer = bufnr,
+                })
             end,
 
             ---@param list_item_a HarpoonListItem
diff --git a/lua/harpoon/extensions.lua b/lua/harpoon/extensions/init.lua
similarity index 79%
rename from lua/harpoon/extensions.lua
rename to lua/harpoon/extensions/init.lua
index c5f0f49..79ebd5d 100644
--- a/lua/harpoon/extensions.lua
+++ b/lua/harpoon/extensions/init.lua
@@ -12,6 +12,7 @@ local HarpoonExtensions = {}
 ---@field UI_CREATE? fun(...): nil
 ---@field SETUP_CALLED? fun(...): nil
 ---@field LIST_CREATED? fun(...): nil
+---@field NAVIGATE? fun(...): nil
 
 HarpoonExtensions.__index = HarpoonExtensions
 
@@ -40,8 +41,21 @@ function HarpoonExtensions:emit(type, ...)
     end
 end
 
+local extensions = HarpoonExtensions:new()
+local Builtins = {
+};
+
+function Builtins.command_on_nav(cmd)
+    return {
+        NAVIGATE = function()
+            vim.cmd(cmd)
+        end,
+    }
+end
+
 return {
-    extensions = HarpoonExtensions:new(),
+    builtins = Builtins,
+    extensions = extensions,
     event_names = {
         ADD = "ADD",
         SELECT = "SELECT",
@@ -50,5 +64,6 @@ return {
         UI_CREATE = "UI_CREATE",
         SETUP_CALLED = "SETUP_CALLED",
         LIST_CREATED = "LIST_CREATED",
+        NAVIGATE = "NAVIGATE",
     },
 }