[
  {
    "reference": "EXP-204",
    "state": "draft",
    "owner": {"name": "Persona A", "email": "a@example.invalid"},
    "period": {"opened_on": "2026-07-01", "closed_on": null},
    "documents": [{"name": "brief.txt", "kind": "text"}],
    "tags": ["alta", "interna"]
  },
  {
    "reference": "EXP-205",
    "state": "waiting",
    "owner": {"name": "B", "email": "not-an-address"},
    "period": {"opened_on": "2026-07-10", "closed_on": "2026-07-02"},
    "documents": [],
    "tags": []
  },
  {
    "reference": "bad-reference",
    "state": "closed",
    "owner": null,
    "period": {"opened_on": "tomorrow"},
    "documents": [{"kind": "pdf"}],
    "tags": ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"]
  }
]