feat(oss): add reranker + per-search rerank to the TypeScript OSS SDK (#6055)

docs/components/rerankers/models/llm_reranker.mdx

@@ -67,6 +67,43 @@ config = {
 }
 ```
 
+## TypeScript (self-hosted)
+
+The [TypeScript OSS SDK](/open-source/features/reranker-search#typescript-sdk) (`mem0ai/oss`) ships the LLM reranker under the provider name `llm_reranker`. It does **not** reuse the Memory's main `llm` instance — it builds its own LLM from the reranker's own config, defaulting to `openai` / `gpt-4o-mini`. Set `provider`/`model`/`apiKey` directly on `config`, or nest a fully separate `config.llm: { provider, config }` (its `provider`/`config` take priority over the top-level fields, which only backfill values missing from the nested config).
+
+```typescript
+import { Memory } from "mem0ai/oss";
+
+const memory = new Memory({
+  reranker: {
+    provider: "llm_reranker",
+    config: { apiKey: process.env.OPENAI_API_KEY },
+  },
+});
+
+const results = await memory.search("What movies do I like?", {
+  filters: { userId: "alice" },
+  rerank: true,
+});
+```
+
+To rerank with a different LLM provider than the Memory's main `llm`, nest it under `config.llm`:
+
+```typescript
+const memory = new Memory({
+  llm: { provider: "openai", config: { apiKey: process.env.OPENAI_API_KEY } },
+  reranker: {
+    provider: "llm_reranker",
+    config: {
+      llm: {
+        provider: "anthropic",
+        config: { apiKey: process.env.ANTHROPIC_API_KEY },
+      },
+    },
+  },
+});
+```
+
 ## Supported LLM Providers
 
 ### OpenAI