Add BEANS-Next dataset card (tier/subset layout)

README.md

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+---
+license: apache-2.0
+configs: []
+---
+
+# beans-next
+
+**beans-next** is the Hugging Face dataset for the **BEANS-Next** Parquet bundle: metadata shards that mirror the public JSONL splits. Audio is **not** embedded—each row keeps GCS URIs so loaders fetch WAV bytes the same way as the `esp_data` path.
+
+**Tiers 1-3** (directories ``tier_1``, ``tier_2``, ``tier_3``) hold only single-audio **Beans-Next** subsets. **Tier 4** (``tier_4_in_context``) holds **only** **Beans-Next** in-context (multi-audio) subsets; those subsets do not appear in tiers 1-3.
+
+## Repository layout
+
+Each subset has one default shard (``test`` split only):
+
+- **tier_1/`<subset>`/test.parquet** — tier 1, Beans-Next (single-audio)
+- **tier_2/`<subset>`/test.parquet** — tier 2, Beans-Next (single-audio)
+- **tier_3/`<subset>`/test.parquet** — tier 3, Beans-Next (single-audio)
+- **tier_4_in_context/`<subset>`/test.parquet** — tier 4 only, Beans-Next (in-context)
+
+### Tier 1 subsets
+
+- `crow-description`
+- `f0-mean-heldout-taxa`
+- `f0-mean-seen-taxa`
+- `zebra-description`
+
+### Tier 2 subsets
+
+- `alarm-call-presence`
+- `amphibian-presence`
+- `bird-presence`
+- `call-type-fixed-vocab`
+- `flight-call-presence`
+- `mammal-presence`
+
+### Tier 3 subsets
+
+- `insect-presence`
+
+### Tier 4 subsets (Beans-Next in-context)
+
+- `crow-4way`
+- `dcase-fewshot-detection-balanced`
+- `giant-otter-4way`
+- `gibbon-fewshot-detection-balanced`
+- `unseen-species-4way`
+- `zebra-4way`
+
+## Provenance
+
+Consolidated with ``scripts/consolidate_beans_next_parquet.py`` from the public GCS JSONL paths encoded for **Beans-Next** in ``beans_pro.datasets.beans_next_parquet``.
+
+## Loading with ``datasets``
+
+Each subset is a separate **configuration** (``config_name`` == subset id). The Hub README maps the Parquet shard to split **``test``** (not ``train``).
+
+```python
+from datasets import load_dataset
+
+ds = load_dataset("EarthSpeciesProject/beans-next", "crow-description", split="test")
+print(ds[0])
+```