In February 2026, Cellison developed a readonly persistent cache for CI performance in the web-infra-dev/rspack repository. This feature introduced a disk-backed cache that supports read operations without writes, aiming to accelerate continuous integration builds and improve build determinism. Cellison implemented storage reset handling to ensure data integrity, added guard rails to stabilize readonly mode, and expanded the test suite to validate cache behavior across CI pipelines. Working primarily with JavaScript and Rust, Cellison focused on backend development and testing, delivering a robust solution that reduces I/O overhead and enables more reliable, efficient CI workflows with minimal operational risk.