{
  "selected_parameters": {
    "algorithm": "UMAP + HDBSCAN (external)",
    "umap_n_neighbors": 10,
    "umap_n_components": 5,
    "umap_metric": "cosine",
    "hdbscan_min_cluster_size": 8,
    "hdbscan_min_samples": null,
    "hdbscan_metric": "euclidean",
    "n_clusters": 23,
    "noise_ratio": 0.0,
    "min_size": 6,
    "max_size": 100,
    "too_small": 0,
    "too_large": 0,
    "silhouette_cosine": 0.082,
    "score": -0.082
  },
  "embedding": {
    "embedding_model": "allenai/specter2_base",
    "embedding_note": "SPECTER2 transformer embeddings from Title + Abstract; DOI retained as paper identifier."
  }
}