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67 lines
2.1 KiB
Markdown
67 lines
2.1 KiB
Markdown
# Persistent Agent with PostgreSQL
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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.
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[Reference](https://langchain-ai.github.io/langgraphjs/reference/classes/checkpoint_postgres.PostgresSaver.html)
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## Key Features
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- **Persistent Memory**: The agent stores chat history in a PostgreSQL database, allowing it to remember past interactions across sessions.
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- **Seamless Integration**: Designed to integrate smoothly with existing setups.
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- **Scalable Solution**: Ideal for applications requiring long-term memory capabilities.
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## Prerequisites
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To use this feature, ensure you have the following:
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1. **PostgreSQL Database URL**: Create and host ur PostgreSQL database and enter the URL. It will be of the format "postgresql://user:password@localhost:5432/db"
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## Without persistence
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```
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Available modes:
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1. chat
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- Interactive chat mode
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2. auto
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- Autonomous action mode
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Choose a mode (enter number or name: 1
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Starting chat mode... Type 'exit' to end.
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Prompt: i am arpit
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Hello Arpit! How can I assist you today?
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Prompt: ^С
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$ ts-node index.ts
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Starting Agent...
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Available modes:
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1. chat
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- Interactive chat mode
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2. auto
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- Autonomous action mode
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Choose a mode (enter number or name): 1
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Starting chat mode... Type 'exit' to end.
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Prompt: do u know my name
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I don't know your name yet. If you'd like, you can share it.
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```
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## With persistence
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```
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Available modes:
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1. chat
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- Interactive chat mode
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2. auto
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- Autonomous action mode
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Choose a mode (enter number or name: 1
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Starting chat mode... Type 'exit' to end.
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Prompt: i am arpit
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Hello Arpit! How can I assist you today?
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Prompt: ^С
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$ ts-node index.ts
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Starting Agent...
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Available modes:
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1. chat
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- Interactive chat mode
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2. auto
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- Autonomous action mode
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Choose a mode (enter number or name): 1
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Starting chat mode... Type 'exit' to end.
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Prompt: do u know my name
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Yes, you mentioned that your name is Arpit. How can I help you today?
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```
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