The rladybugdb source package contains LadybugDB 0.20.4 source code.

LadybugDB
  Copyright (c) 2022-2025 Kùzu Inc.
  Copyright (c) 2025-2026 Ladybug Memory Inc.
  License: MIT

LadybugDB bundles third-party components under permissive licenses, including
MIT, BSD, Apache License 2.0, and dual MIT/Apache License 2.0 terms. Copyright
notices and the complete license texts supplied by each component are retained
in tools/vendor/ladybugdb-0.20.4.tar.xz in the source package. They include the
license files for ALP, ANTLR4, Brotli, cppjieba/limonp, FastPFOR, LZ4, Mbed TLS,
miniz, Parquet/Thrift, PCG, pybind11, RE2, CRoaring, SimSIMD, Snappy, spdlog,
taywee/args, utf8proc, yyjson, and Zstandard.

The LadybugDB MIT license is also present as lbug-src/LICENSE inside that
archive. The CRAN portability changes are recorded separately in
tools/patches/ladybugdb-cran.patch.