Change the prompt to be more like Shell and only display the current folder.

my-agnoster.zsh-theme.diff

diff --git a/themes/agnoster.zsh-theme b/themes/agnoster.zsh-theme
index 07546fd..e6dec73 100644
--- a/themes/agnoster.zsh-theme
+++ b/themes/agnoster.zsh-theme
@@ -80,7 +80,7 @@ prompt_end() {
 # Context: user@hostname (who am I and where am I)
 prompt_context() {
   if [[ "$USER" != "$DEFAULT_USER" || -n "$SSH_CLIENT" ]]; then
-    prompt_segment black default "%(!.%{%F{yellow}%}.)$USER@%m"
+    prompt_segment black default "%(!.%{%F{yellow}%}.)$USER:"
   fi
 }
 
@@ -187,7 +187,7 @@ prompt_hg() {
 
 # Dir: current working directory
 prompt_dir() {
-  prompt_segment blue black '%~'
+  prompt_segment blue black '%1//'
 }
 
 # Virtualenv: current working virtualenv