December 2025: Delivered major enhancements to immutable sorted collections in moonbitlang/core. Implemented range queries for immut/sorted_map and immut/sorted_set, plus reverse iteration for SortedMap and SortedSet. These changes improve data retrieval performance and API usability, bringing immutable collections in line with mutable counterparts and standard library patterns. The work included API design, implementation, and tests, with clear business value in enabling efficient queries and multi-step data processing.

December 2024: OCaml/ocaml documentation aligned with the actual C interface. Fixed incorrect reference to hash_variant by updating the manual to caml_hash_variant, matching the declaration in caml/mlvalues.h. No code changes were required; impact is improved developer experience and reduced API confusion.