initial commit: slides + practica_resueltos + README

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-29 11:50:55 +02:00
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+---
+layout: default
+---
+
+# Checkpointer: PostgresSaver
+
+<div class="mt-4 text-xs">
+
+<v-click>
+
+**PostgresSaver**: Persistencia en PostgreSQL (producción)
+
+```bash
+npm install @langchain/langgraph-checkpoint-postgres
+```
+
+</v-click>
+
+<v-click>
+
+```typescript
+import { createAgent } from "langchain";
+import { PostgresSaver } from "@langchain/langgraph-checkpoint-postgres";
+
+const DB_URI = "postgresql://user:pass@localhost:5432/mydb";
+const checkpointer = PostgresSaver.fromConnString(DB_URI);
+await checkpointer.setup();
+
+const agent = createAgent({
+  model: "mistral:mistral-large-latest",
+  tools: [weatherTool],
+  checkpointer,
+});
+```
+
+</v-click>
+
+<v-click>
+
+<div class="mt-4 text-xs opacity-80">
+También disponibles: **MongoDB** (`@langchain/langgraph-checkpoint-mongodb`),
+**Redis** (`@langchain/langgraph-checkpoint-redis`), y **Custom** (implementar `BaseCheckpointSaver`)
+</div>
+
+</v-click>
+
+</div>