seed SCHEMA.md

SCHEMA.md

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+# Schema & curation notes
+
+`metadata.jsonl` — one JSON object per line, HF `imagefolder` compatible
+(`file_name` points into `images/`).
+
+Fields: see the dataset card. Labels are weakly-supervised (single self-report);
+a downstream consensus / expert-review pass is expected before training use.
+
+`leaderboard.jsonl` — game scores (separate from the training data):
+  { "contributor", "skill_correct", "skill_total", "machine_correct",
+    "contributions", "updated" }