Pairwise sequence alignment from one portable C++17 core: edit-distance (Levenshtein / WFA-equivalent) and Smith-Waterman local alignment, both with score and CIGAR reconstruction. The core builds and runs anywhere (it is the CPU backend, so it needs no GPU toolchain); the wavefront/GPU backend (ROCm/CUDA) computes the same results with acceleration and is tracked in the sibling C++ repository. A batch API aligns many pairs in one call and reports how many were resolved, so silent under-serving is impossible. Designed to slot into data.frame/tibble pipelines.