readme: initial Zen reranker bare-name mirror

README.md

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+---
+license: apache-2.0
+library_name: transformers
+base_model: Qwen/Qwen3-Reranker-8B
+pipeline_tag: text-classification
+language:
+- en
+- zh
+tags: [zen, zen-reranker, zenlm, hanzo, reranker]
+---
+
+# Zen Reranker 8B
+
+8B-parameter cross-encoder reranker for retrieval pipelines and search relevance. Part of the Zen reranker family.
+
+## Hosted via Hanzo gateway
+
+Served at `api.hanzo.ai` as `zen-reranker-8b`.
+
+## Files
+
+Native HuggingFace `safetensors` weights, loadable directly with `transformers`:
+
+```python
+from transformers import AutoModel, AutoTokenizer
+m = AutoModel.from_pretrained("zenlm/zen-reranker-8B")
+t = AutoTokenizer.from_pretrained("zenlm/zen-reranker-8B")
+```
+
+For GGUF / Ollama deployment, see [zenlm/zen-reranker-8B-GGUF](https://huggingface.co/zenlm/zen-reranker-8B-GGUF).
+
+## Acknowledgements
+
+Built on [Qwen/Qwen3-Reranker-8B](https://huggingface.co/Qwen/Qwen3-Reranker-8B) (Apache-2.0). Mirrored here as the canonical Zen reranker family entry.