Erlang term serialization, for values that are arbitrary Elixir terms.

iex> Bedrock.Encoding.BERT.unpack(Bedrock.Encoding.BERT.pack(%{cents: 500}))
%{cents: 500}

Use this for values, not keys

The external term format is not order-preserving: the byte ordering of two packed terms says nothing about the ordering of the terms themselves. A keyspace using it as a :key_encoding would still store and fetch individual keys correctly, but range reads would return them in an order unrelated to their logical one. Reach for Bedrock.Encoding.Tuple when the ordering matters, which for keys it almost always does.

Decoding untrusted bytes

unpack/1 calls :erlang.binary_to_term/1 without the :safe option, so decoding attacker-controlled bytes can create atoms — an unbounded resource — and reconstruct pids and funs. Values written by your own application are fine; do not point this at bytes from somewhere you do not control.