The files in this repo are copied from https://github.com/facebook/rocksdb/tree/main/tools/rdb as is.
The last RocksDB release containing this component is 6.29: https://github.com/facebook/rocksdb/tree/6.29.fb/tools/rdb
If you plan to continue development, feel free to fork from here or copy from older versions of RocksDB, as long as the license/copyright headers are perserved.