diff --git a/lib/waldwaechter.sh b/lib/waldwaechter.sh
index 76a160c..74cb3d8 100644
--- a/lib/waldwaechter.sh
+++ b/lib/waldwaechter.sh
@@ -3,7 +3,18 @@
 # Source this file to make all AI characters available as commands
 
 # Determine the repo root directory (lib/ is inside repo root)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# Support both bash and zsh
+if [[ -n "$BASH_VERSION" ]]; then
+    # Bash: use BASH_SOURCE
+    SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+elif [[ -n "$ZSH_VERSION" ]]; then
+    # Zsh: use ${(%):-%x} to get the script path
+    SCRIPT_DIR="$(cd "$(dirname "${(%):-%x}")" && pwd)"
+else
+    # Fallback: use $0 (may not work when sourced)
+    SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+fi
+
 WALDWAECHTER_DIR="$(dirname "$SCRIPT_DIR")"
 ROLES_DIR="${WALDWAECHTER_DIR}/crumbforest_roles"