{
  "schema": "amduat.conformance.fixtures.v0",
  "fixtures": [
    {"id": "empty", "artifact": "a0.bin", "notes": "empty payload"},
    {"id": "hello", "artifact": "a1.bin", "notes": "ascii payload"},
    {"id": "binary", "artifact": "a2.bin", "notes": "0..255"}
  ]
}