🛰️ export from upstream (b301c15)

crates/sandcage/src/docker.rs

@@ -291,6 +291,7 @@ pub fn resolve_agent_home(sandcage_home: &Path, profile: Option<&str>) -> PathBu
             eprintln!("sandcage: warning: failed to create home profile '{name}': {e}");
         } else {
             eprintln!("sandcage: created home profile '{name}'");
+            seed_zshrc(&agent_home);
         }
     }
 
@@ -301,6 +302,16 @@ pub fn resolve_agent_home(sandcage_home: &Path, profile: Option<&str>) -> PathBu
     agent_home
 }
 
+pub fn seed_zshrc(agent_home: &Path) {
+    let zshrc = agent_home.join(".zshrc");
+    if !zshrc.exists() {
+        let _ = std::fs::write(&zshrc, concat!(
+            "PROMPT='%F{blue}%~%f %# '\n",
+            "alias ls='ls --color=auto'\n",
+        ));
+    }
+}
+
 fn migrate_legacy_home(legacy: &Path, homes_dir: &Path) -> std::result::Result<(), std::io::Error> {
     let default_dir = homes_dir.join("default");
     std::fs::create_dir_all(homes_dir)?;

crates/sandcage/src/init.rs

@@ -77,6 +77,9 @@ pub fn preseed_with_home(home: &Path) -> Result<()> {
             .map_err(|e| InitError::WriteFileFailed(justfile.clone(), e))?;
     }
 
+    // 7. Seed .zshrc to suppress zsh-newuser-install wizard
+    crate::docker::seed_zshrc(&agent_home);
+
     Ok(())
 }