n8n-nodes-readonly-memory

A read-only memory node for n8n that connects to PostgreSQL for reading memory without write operations.

Features

• Read-Only Operation: Only reads from PostgreSQL database, never writes
• Session Management: Supports session-based memory retrieval
• Context Window: Configurable context window length for memory retrieval
• AI Agent Integration: Designed to work with n8n AI agents
• PostgreSQL Support: Uses PostgreSQL for memory storage

Installation

1. Install the package:

npm install n8n-nodes-readonly-memory

2. Build the package:

npm run build

Usage

Configuration

1. PostgreSQL Credentials: Configure your PostgreSQL database credentials
2. Table Name: Specify the table name to read from (default: n8n_chat_histories)
3. Session ID: Choose how to identify the session:
   • From connected Chat Trigger node
   • Custom key/expression
4. Context Window Length: Set how many past interactions to include (default: 5)

Connecting to AI Agents

This node is designed to be connected to AI agents in n8n workflows. It provides read-only access to conversation history stored in PostgreSQL.

Example Workflow

1. Chat Trigger → Read-Only Memory → AI Agent
2. The memory node reads conversation history from PostgreSQL
3. The AI agent receives the conversation context without modifying the database

Development

Building

npm run build

Development Mode

npm run dev

Linting

npm run lint
npm run lintfix

License

MIT