Background Information

Project overview

Setup

Introduction

Prompt template

LCEL

Introduction to prompt engineering

Prompts

Memory

Conversation memory

Supabase

Restoring memory

Vectorstores

Supabase vector

Ingest

Retrieval

Generation

Retrieval Augmented Generation

Output Parsing

Tools

Agents

Langsmith

Farewell

( the primaryDescriptionMarkdown is long - several lines, include images, as long as you want )

In this course we <headline of what we do>. <why this technology is good> but <here's how learning it is problem>. 

In <the length of these lessons> we cover <three salient points about what we cover. Your BEST points>. Its <however long it is> and comes with <these bonus features, and reasons to buy. code, etc.>

It's taught by <author name> who <credibility, reason you should listen to them>. <social proof, if you have it yet>

<then you can list other supporting stuff you want to add, anything you want here>

-------
Example:
-------

We created a free course to create your first GraphQL server (from scratch) using Node and TypeScript. TypeScript and GraphQL are a powerful combo, but there's a lot of confusing edges if you're getting it setup the first time.

In this course we cover the basics of getting TypeScript setup with Node, how GraphQL works, and how to set up a GraphQL server using Apollo server. It's two hours long, it comes with complete code examples, and we walk through the code step-by-step.

It's taught by my friend, Shopify-engineer Hassan Djirdeh and he's integrated what he's learned using GraphQL in production as an engineer at Shopify. We've already had over 1,300 students enroll and it's been getting great reviews so far.

// ... and so on

In this course we <headline of what we do>. <why this technology is good> but <here's how learning it is problem>. 

( the summary is short - one or two lines )

Langchain.js Bootcamp

This section is for glancing over the code that goes into enabling conversation saving in the application. All of these have been implemented but it's good to know what is going on in the application. However, if this section feels too familiar, please go ahead and move to the next one.

We have 3 server actions related to messages. 

But first, we should initialize a supabase server client from our util.

import { createSupabaseClient } from '@/lib/serverUtils'

export async function getChat( id: string ) {

export async function removeChat( id: string ) {

We check for authentication in each action by calling the 

---
code: https://gitlab.com/fullstackio/books/newline-course-apps/jeffery-wang-langchain.js-bootcamp-app/-/tree/main/Code/module_03/lesson_03.04/protected/src?ref_type=heads
---

# Restoring memory

This section is for glancing over the code that goes into enabling conversation saving in the application. All of these have been implemented but it's good to know what is going on in the application. However, if this section feels too familiar, please go ahead and move to the next one.

## Actions

We have 3 server actions related to messages. `getChats` to obtain a user's chat history. `getChat` to get the messages of a chat by `id`. And `removeChat` to delete.

But first, we should initialize a supabase server client from our util.

```ts { actualFilename=./protected/src/actions.ts endLine=2 startLine=2 statedFilename=import url=https&#x3A;//gitlab.com/fullstackio/books/langchainjs-bootcamp/module_03/lesson_03.04/protected/src/actions.ts#L2 }
import { createSupabaseClient } from '@/lib/serverUtils'
```

```ts { actualFilename=./protected/src/actions.ts endLine=5 startLine=5 statedFilename=getuserchats url=https&#x3A;//gitlab.com/fullstackio/books/langchainjs-bootcamp/module_03/lesson_03.04/protected/src/actions.ts#L5 }
export async function getChats() {
```

```ts { actualFilename=./protected/src/actions.ts endLine=30 startLine=30 statedFilename=getchat url=https&#x3A;//gitlab.com/fullstackio/books/langchainjs-bootcamp/module_03/lesson_03.04/protected/src/actions.ts#L30 }
export async function getChat( id: string ) {
```

```ts { actualFilename=./protected/src/actions.ts endLine=50 startLine=50 statedFilename=removechat url=https&#x3A;//gitlab.com/fullstackio/books/langchainjs-bootcamp/module_03/lesson_03.04/protected/src/actions.ts#L50 }
export async function removeChat( id: string ) {
```