readme

examples/persistance-agent/.env.example

@@ -1,3 +1,4 @@
 OPENAI_API_KEY=
 RPC_URL=
 SOLANA_PRIVATE_KEY=
+POSTGRES_DB_URL=

examples/persistance-agent/README.md

@@ -0,0 +1,66 @@
+# Persistent Agent with PostgreSQL
+
+This example showcases a persistent agent that retains memory across sessions using a PostgreSQL database. It ensures that the agent can remember previous conversations even after being restarted, enhancing the user experience in applications requiring long-term context retention.
+[Reference](https://langchain-ai.github.io/langgraphjs/reference/classes/checkpoint_postgres.PostgresSaver.html)
+
+## Key Features
+
+- **Persistent Memory**: The agent stores chat history in a PostgreSQL database, allowing it to remember past interactions across sessions.
+- **Seamless Integration**: Designed to integrate smoothly with existing setups.
+- **Scalable Solution**: Ideal for applications requiring long-term memory capabilities.
+
+## Prerequisites
+
+To use this feature, ensure you have the following:
+
+1. **PostgreSQL Database URL**: Create and host ur PostgreSQL databse and enter the URL. It will be of the format "postgresql://user:password@localhost:5432/db"
+
+## Before applying persistance
+```
+Available modes:
+1. chat
+- Interactive chat mode
+2. auto
+- Autonomous action mode
+Choose a mode (enter number or name: 1
+Starting chat mode... Type 'exit' to end.
+Prompt: i am arpit
+Hello Arpit! How can I assist you today?
+Prompt: ^С
+® arpitsingh Mac persistance-agent & ts-node index.ts
+Starting Agent...
+Available modes:
+1. chat
+- Interactive chat mode
+2. auto
+- Autonomous action mode
+Choose a mode (enter number or name): 1
+Starting chat mode... Type 'exit' to end.
+Prompt: do u know my name
+I don't know your name yet. If you'd like, you can share it.
+```
+## After applying persistence
+```
+Available modes:
+1. chat
+- Interactive chat mode
+2. auto
+- Autonomous action mode
+Choose a mode (enter number or name: 1
+Starting chat mode... Type 'exit' to end.
+Prompt: i am arpit
+Hello Arpit! How can I assist you today?
+Prompt: ^С
+® arpitsingh Mac persistance-agent & ts-node index.ts
+Starting Agent...
+Available modes:
+1. chat
+- Interactive chat mode
+2. auto
+- Autonomous action mode
+Choose a mode (enter number or name): 1
+Starting chat mode... Type 'exit' to end.
+Prompt: do u know my name
+Yes, you mentioned that your name is Arpit. How can I help you today? 
+```
+

examples/persistance-agent/index.ts

@@ -9,7 +9,7 @@ import { PostgresSaver } from "@langchain/langgraph-checkpoint-postgres";
 dotenv.config();
 
 const checkpointer = PostgresSaver.fromConnString(
-    "postgresql://user:password@localhost:5432/db"
+    process.env.POSTGRES_DB_URL!
 );
 
 function validateEnvironment(): void {