When decode(encode(x)) == x is not enough

This Habr article explores fundamental data serialization issues that go beyond simple value equality. The author notes that the standard decode(encode(x)) == x check is often insufficient when dealing with complex data structures. The focus is on the nuances of maintaining referential integrity, object identity, managing backing arrays in slices, and handling circular references. The material discusses what should be included in a wire representation, the validity of multiple representations for a single value, and the resource constraints of decoders when processing untrusted input. The author suggests rethinking these problems not as a set of independent trade-offs, but as a comprehensive challenge in designing data transmission systems, urging developers to analyze more deeply the boundaries of what is considered a 'preserved value' in modern software architectures.