diff --git a/README.md b/README.md
index cbc2815..8f6c1f7 100644
--- a/README.md
+++ b/README.md
@@ -11,4 +11,6 @@ path to the binaries.
   `ifconfig` (kind of redundant because we can use `ip` in the WSL but keeping
   it here anyway for convenience)
 - `wsl`: use the WSL to WSL the WSL.
+- `start`: start `tmux` as a sub-process of `ssh-agent` and attach to the
+   `main` session, creating it if not existent.
 
diff --git a/bin/start b/bin/start
new file mode 100644
index 0000000..d7e8b01
--- /dev/null
+++ b/bin/start
@@ -0,0 +1,3 @@
+#!/bin/sh
+exec ssh-agent tmux new-session -A -t main "$@"
+