Upgrade Cross-Encoder to BAAI/bge-reranker-base (README.md)

README.md

@@ -1,13 +1,53 @@
 ---
-title: Cross Encoder Reranking API
-emoji: 🔥
-colorFrom: red
-colorTo: yellow
-sdk: gradio
-sdk_version: 6.2.0
-app_file: app.py
+title: Cross-Encoder Reranking API
+emoji: ⚖️
+colorFrom: indigo
+colorTo: blue
+sdk: docker
 pinned: false
-license: mit
+app_port: 7860
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# ⚖️ FinReg BGE Cross-Encoder Reranking API
+
+High-performance cloud cross-encoder re-ranking service powered by **`BAAI/bge-reranker-base`**.
+
+---
+
+## 🚀 Quick Usage (POST `/rerank`)
+
+### Request
+```json
+POST /rerank
+Content-Type: application/json
+
+{
+  "query": "What are Priority Sector Lending targets under RBI norms?",
+  "documents": [
+    "RBI Circular on Priority Sector Lending: Domestic commercial banks must achieve 40% of ANBC...",
+    "SEBI Mutual Fund regulations: AMCs must maintain minimum net worth of Rs 50 Crore...",
+    "PMLA Act: Banking entities must retain transaction records for 5 years..."
+  ],
+  "top_k": 2
+}
+```
+
+### Response
+```json
+{
+  "query": "What are Priority Sector Lending targets under RBI norms?",
+  "model": "BAAI/bge-reranker-base",
+  "total_evaluated": 3,
+  "latency_ms": 42.5,
+  "scores": [0.954, 0.001, 0.002],
+  "ranked_indices": [0, 2, 1],
+  "ranked_results": [
+    {
+      "rank": 1,
+      "original_index": 0,
+      "score": 0.954,
+      "document": "RBI Circular on Priority Sector Lending: Domestic commercial banks must achieve 40% of ANBC..."
+    }
+  ]
+}
+```