diff --git a/hooks/lib/template-loader.sh b/hooks/lib/template-loader.sh
index 13d29f6e..d3886147 100644
--- a/hooks/lib/template-loader.sh
+++ b/hooks/lib/template-loader.sh
@@ -70,7 +70,12 @@ render_template() {
     # Scans for {{VAR}} patterns and replaces them with values from environment
     # Replaced content goes directly to output without re-scanning
     local awk_exit=0
-    content=$(env "${env_vars[@]}" awk '
+    # ${arr[@]+"${arr[@]}"} expands to the quoted elements when the array is
+    # non-empty and to nothing when it is empty -- required because bash 3.2
+    # (the macOS default) treats "${empty_array[@]}" as an unbound-variable
+    # error under `set -u`, which aborts the sourcing hook with a non-zero,
+    # non-blocking exit and no stderr.
+    content=$(env ${env_vars[@]+"${env_vars[@]}"} awk '
     BEGIN {
         # Build lookup table from environment variables with TMPL_VAR_ prefix
         for (name in ENVIRON) {
diff --git a/hooks/loop-codex-stop-hook.sh b/hooks/loop-codex-stop-hook.sh
index 0c191d4c..2510742f 100755
--- a/hooks/loop-codex-stop-hook.sh
+++ b/hooks/loop-codex-stop-hook.sh
@@ -1263,7 +1263,7 @@ Provider: codex
     echo "Running codex review with timeout ${CODEX_TIMEOUT}s in $PROJECT_ROOT (base: $review_base)..." >&2
 
     CODEX_REVIEW_EXIT_CODE=0
-    (cd "$PROJECT_ROOT" && run_with_timeout "$CODEX_TIMEOUT" codex review "${CODEX_DISABLE_HOOKS_ARGS[@]}" --base "$review_base" "${CODEX_REVIEW_ARGS[@]}") \
+    (cd "$PROJECT_ROOT" && run_with_timeout "$CODEX_TIMEOUT" codex review ${CODEX_DISABLE_HOOKS_ARGS[@]+"${CODEX_DISABLE_HOOKS_ARGS[@]}"} --base "$review_base" "${CODEX_REVIEW_ARGS[@]}") \
         > "$CODEX_REVIEW_LOG_FILE" 2>&1 || CODEX_REVIEW_EXIT_CODE=$?
 
     echo "Code review exit code: $CODEX_REVIEW_EXIT_CODE" >&2
@@ -1692,7 +1692,7 @@ echo "Codex command saved to: $CODEX_CMD_FILE" >&2
 echo "Running summary review with timeout ${CODEX_TIMEOUT}s..." >&2
 
 CODEX_EXIT_CODE=0
-printf '%s' "$CODEX_PROMPT_CONTENT" | run_with_timeout "$CODEX_TIMEOUT" codex exec "${CODEX_DISABLE_HOOKS_ARGS[@]}" "${CODEX_EXEC_ARGS[@]}" - \
+printf '%s' "$CODEX_PROMPT_CONTENT" | run_with_timeout "$CODEX_TIMEOUT" codex exec ${CODEX_DISABLE_HOOKS_ARGS[@]+"${CODEX_DISABLE_HOOKS_ARGS[@]}"} "${CODEX_EXEC_ARGS[@]}" - \
     > "$CODEX_STDOUT_FILE" 2> "$CODEX_STDERR_FILE" || CODEX_EXIT_CODE=$?
 
 echo "Codex exit code: $CODEX_EXIT_CODE" >&2