diff --git a/README.md b/README.md
index af6288f..bfb3869 100644
--- a/README.md
+++ b/README.md
@@ -62,9 +62,22 @@ You can override settings in `setup`:
 ```lua
 require("makemapper").setup({
     prefix = "<leader>m", -- the prefix applied to all keymaps generated from annotations
+    runner = "nvim_vsplit",
+    -- runner can be one of:
+    --   "nvim_vsplit" (default)
+    --   "harpoon_tmux" (requires harpoon.nvim)
+    --   your own custom runner (a function taking a command string)
 })
 ```
 
+## Changing Runners
+
+If you want to change runner after calling `setup`, then use:
+
+```lua
+require("makemapper").set_runner(...)
+```
+
 # Which-key
 
 [whick-key](https://github.com/folke/which-key.nvim) users may wish to add a description to the
@@ -79,6 +92,5 @@ require("which-key").register({
 # TODO
 
 + Document requirement for `make` treesitter parser to be installed
-+ Other configurable run strategies, not just terminal in a vertical split!
 + Provide an option to change the annotation from `nvim_map(.*)` to something user-defined.
 + Filter out "special" targets like `.PHONY`
diff --git a/lua/makemapper/init.lua b/lua/makemapper/init.lua
index cedfe62..a113ce3 100644
--- a/lua/makemapper/init.lua
+++ b/lua/makemapper/init.lua
@@ -1,11 +1,15 @@
 local M = {}
 
-local term_nvim = function(cmd)
-    vim.cmd("vsplit | terminal " .. cmd)
-end
+local runners = {
+    nvim_vsplit = function(cmd)
+        vim.cmd("vsplit | terminal " .. cmd)
+    end,
+    harpoon_tmux = function(cmd)
+        require("harpoon.tmux").sendCommand(1, cmd .. "\n")
+    end,
+}
 
--- TODO have options select different runners
-local runner = term_nvim
+local runner
 
 -- given a general strategy for running commands, curry in "make {target}"
 M.make_runner = function(target)
@@ -16,6 +20,7 @@ end
 
 local default_opts = {
     prefix = "<leader>m",
+    runner = "nvim_vsplit",
 }
 
 local opts
@@ -27,9 +32,21 @@ local set_mappings = function(m)
     end
 end
 
+local get_runner = function(spec)
+    if type(spec) == "function" then
+        return spec
+    end
+    return runners[spec]
+end
+
+M.set_runner = function(spec)
+    runner = get_runner(spec) or get_runner(default_opts.runner)
+end
+
 M.setup = function(o)
     opts = vim.tbl_deep_extend("force", {}, default_opts, o or {})
 
+    M.set_runner(opts.runner)
     set_mappings(require("makemapper.makefile").parse_mappings())
 end