refactor(lib): extract large inline python blocks to lib_py package and optimize abstraction layer

.agents/skills/multi-agent-mux-create/scripts/create_session.sh

@@ -82,6 +82,10 @@ fi
 # Preflight
 [ -n "$WORKSPACE" ] || { echo "ERROR: --workspace required" >&2; usage; exit 2; }
 [ -n "$AGENT" ]    || { echo "ERROR: --agent required" >&2; usage; exit 2; }
+case "$AGENT" in
+  claude|agy|hermes|cline) ;;
+  *) echo "ERROR: --agent must be claude, agy, hermes or cline, got: $AGENT" >&2; exit 2 ;;
+esac
 [ -n "$ROLE" ]     || { echo "ERROR: --role required" >&2; usage; exit 2; }
 [ -d "$WORKSPACE" ] || { echo "ERROR: workspace $WORKSPACE not a directory" >&2; exit 1; }
 # B-3: `command -v herdr` matches lib.sh's herdr() function and `type -P herdr`
@@ -117,7 +121,7 @@ fi
 
 # 세션 이름 — lib.sh::derive_session_name 이 단일 소스 (P0-A)
 if [ -z "$SESSION_NAME" ]; then
-  SESSION_NAME="$(derive_session_name "$WORKSPACE" "$AGENT")"
+  SESSION_NAME="$(derive_session_name "$WORKSPACE" "$AGENT" "$ROLE")"
 fi
 
 # 이미 살아있으면 실패
@@ -168,6 +172,7 @@ spawn() {
     claude)
       if { [ -x "$WRAPPER" ] && [ "$(basename "$WRAPPER")" != "claude" ]; } || [ "$USE_WRAPPER" = "1" ]; then
         SESSION_UUID=""
+        CMD_FULL="${RESOLVED_BIN} --dangerously-skip-permissions"
         nohup "$WRAPPER" >/dev/null 2>&1 &
         disown
       else