Checkpoint. Known issues, fixed in part 2: short writes on stdout,
byte-wise stdin reads, Result suffix on all result schemas, lost enum
variant docs, serde errors as invalid params, missing item docs.
Params go from consumer to provider, results from provider to consumer.
Sender objects are closed, receiver objects open unless they reject
additional properties. Covers the Draft 7 subset with refs, cycles,
nullable values, string enums, arrays, and integer ranges, rejects other
constructs, and gives counterexamples. Property test over random subset
schemas.
surma