Worked on enhancing module loading stability for the web-infra-dev/rspack repository, focusing on backend development using Rust and Node.js. Addressed a critical bug by ensuring symbol identities are shared across multiple module loads, switching from Symbol() to Symbol.for() to prevent undefined identifiers and related crashes. Introduced a defensive fallback in the importModule function to handle undefined identifiers gracefully, improving reliability across platforms. Additionally, reorganized the symbol registry by namespacing define_symbols! keys, which aids maintainability and clarity in symbol management. These targeted improvements contributed to more robust module exports and better observability within the backend infrastructure.