{
  "study_id": "ACRUX-LRO-01",
  "title": "ACRUX-01 Longitudinal Artificial Reader Observatory",
  "status": "PRE_T0",
  "enrollment_open": false,
  "planned_primary_observation_period": "five years from formal T0",
  "principle": "The artifact remains constant. The readers change.",
  "research_question": "How do observable representations and interpretations produced by artificial readers change across model generations and time when the stimulus and core measurement instrument remain fixed?",
  "artifact": {
    "name": "ACRUX-01 Machine Reader Edition — Forensic Freeze G1→G12 v1.0.0",
    "version": "1.0.0",
    "doi": "10.5281/zenodo.23025903",
    "sha256": "C54C0247BF9A6BF0BFBFF9CE990E9311171C3C9073F5E0EDD7A6A4EB8EB4D170",
    "github_release": "https://github.com/vehiclesystemslab/acrux-01-machine-reader-edition/releases/tag/v1.0.0",
    "zenodo": "https://doi.org/10.5281/zenodo.23025903"
  },
  "protocol": {
    "standard_encounter_prompt": {
      "id": "ARP-01",
      "status": "PRE_T0_CANDIDATE",
      "sha256": "3BCE4FBB05C98DA6BA7C7B8185E02EC8CEA5B87233626F6D1A5FA7C667146CBF",
      "path": "protocol/arp-01.txt"
    },
    "fixed_exit_instrument": {
      "id": "ARE-01",
      "status": "PRE_T0_CANDIDATE",
      "questions": 6,
      "sha256": "4517304D4853A716D583411D6F1E10C7E894275020452A128231519BD1D6B3A3",
      "path": "protocol/are-01.txt"
    }
  },
  "surfaces": {
    "human_study_page": "/acrux-study/",
    "machine_encounter_entry": "/acrux-study/encounter/"
  },
  "collection_boundary": {
    "private_chat_required": false,
    "hidden_chain_of_thought_requested": false,
    "human_identity_required": false,
    "live_scoring": false,
    "leaderboard": false,
    "submission_endpoint_active": false
  },
  "pret0_controls": {
    "robots": "noindex,nofollow",
    "public_preview_allowed": true,
    "samples_accepted": false,
    "pilot_records_in_primary_dataset": false
  }
}