Module value 

Backend-agnostic JSON-shaped value used throughout the framework (auth claims, audit payloads, RPC error details, schema config).

Enums

Value

Serialize/Deserialize are hand-written in [mod@codec] and are untagged: Value::String("foo") goes on the wire as "foo", not {"String":"foo"}. Do not replace them with a derive — that reintroduces serde’s externally-tagged enum representation into every wire payload and every generated client. See the module docs on [mod@codec] for the two format-specific choices (Null via serialize_none, Bytes branching on is_human_readable) and why each is load-bearing.