{
  "version": 1,
  "domain": "filename",
  "description": "Filename → canonical JAV ID (with optional #partN suffix). Consumed by Python rc-jav.extract_id.",
  "case_schema": {
    "name": "human label",
    "input": "filename including extension",
    "expected": "canonical ID (e.g. ABC-001 or ABC-001#part1) or null when no ID present"
  },
  "cases": [
    { "name": "plain dashed ID",                       "input": "ABC-027.mp4",                            "expected": "ABC-027" },
    { "name": "dashed ID with resolution tag",         "input": "SCOP-297 [1080p].mp4",                   "expected": "SCOP-297" },
    { "name": "bracket-wrapped ID",                    "input": "[REAL-779].mp4",                         "expected": "REAL-779" },
    { "name": "bracket-wrapped ID with extra tag",     "input": "[SCOP-297] [1080p].mp4",                 "expected": "SCOP-297" },
    { "name": "no-hyphen fallback",                    "input": "MVSD312.avi",                            "expected": "MVSD-312" },
    { "name": "trailing lowercase variant letter",     "input": "IBW-902z.mp4",                           "expected": "IBW-902z" },
    { "name": "multipart _PART suffix",                "input": "KV-118 - Aiba Reika_PART1.mp4",          "expected": "KV-118#part1" },
    { "name": "multipart _A letter suffix",            "input": "KV-118_A.mp4",                           "expected": "KV-118#part1" },
    { "name": "multipart trailing -N before bracket",  "input": "OFJE-195-7 [480p].mp4",                  "expected": "OFJE-195#part7" },
    { "name": "FC2 PPV plain",                         "input": "FC2-1841460.mp4",                        "expected": "FC2-PPV-1841460" },
    { "name": "FC2 PPV explicit",                      "input": "FC2-PPV-1841460.mp4",                    "expected": "FC2-PPV-1841460" },
    { "name": "no ID present",                         "input": "random_video.mp4",                       "expected": null }
  ]
}