{
  "intent": "Fix two failures in install_core_system.sh run: workout locker PYTHONPATH and steam enforcer sudo",
  "scope": [
    "python_pkg/screen_locker/install_systemd.sh",
    "linux_configuration/install_core_system.sh"
  ],
  "changes": [
    "install_systemd.sh: set PYTHONPATH to repo root before running screen_lock.py status check so python_pkg is importable",
    "install_core_system.sh: call steam backlog enforcer installer with sudo so EUID check passes for systemd service install"
  ],
  "verification": [
    {
      "command": "shellcheck python_pkg/screen_locker/install_systemd.sh linux_configuration/install_core_system.sh",
      "result": "pass",
      "evidence": "no warnings"
    }
  ],
  "risks": [
    "sudo on steam enforcer installs pip packages as root; acceptable since --break-system-packages is already used"
  ],
  "rollback": ["git revert HEAD"]
}