philiprehberger-deep_freeze

https://github.com/philiprehberger/rb-deep-freeze

Recursively freeze entire object graphs (hashes, arrays, strings, structs, Data) to create truly immutable data structures. Includes deep_dup, deep_frozen?, deep_equal?, deep_diff, deep_freeze_all, deep_clone, and freeze_hash_keys. Handles circular references and selective key exclusion.