Worked on the fastly/Viceroy repository to deliver a targeted stability fix addressing adapter selection in wit-bindgen library components. Focused on backend development using Rust and WebAssembly, the work corrected the noshift adapter logic to ensure proper handling of export-only components and prevent memory corruption across composition boundaries. The solution maintained performance for pure WASIp1 modules by restricting changes to only the affected cases. Validation involved a minimal inspector and consumer pair to confirm cross-boundary correctness and prevent regressions. This contribution closed a tracked issue and demonstrated careful attention to safety, performance, and maintainability within a complex backend system.