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

To use Langsmith you need to have an account. It's currently in beta as of writing but it should be easy to apply. Mention this course!

Langsmith is built into Langchain. It's very easy to set up. All we have to do is grab a few environment variables from Langsmith and put them in the project.

Click on the key in the bottom left and generate an API token. Save it to the 

. You should also see some existing variables.

LANGCHAIN_TRACING_V2=true
LANGCHAIN_ENDPOINT=https://api.smith.langchain.com
LANGCHAIN_API_KEY=<YOUR_API_TOKEN>

. The endpoint can be altered to self host Langsmith. It's useful if you have sensitive data.

Now go back to the homepage and create a project. Give it a name and leave the other fields blank. Add the value to 

---
code: https://gitlab.com/fullstackio/books/newline-course-apps/jeffery-wang-langchain.js-bootcamp-app/-/tree/main/Code/module_05/lesson_05.04/protected/src?ref_type=heads
---

# Langsmith

To use Langsmith you need to have an account. It's currently in beta as of writing but it should be easy to apply. Mention this course!

## Setup

Langsmith is built into Langchain. It's very easy to set up. All we have to do is grab a few environment variables from Langsmith and put them in the project.

First, let's grab our API token.

Click on the key in the bottom left and generate an API token. Save it to the `.env.local` file under `LANGCHAIN_API_KEY`. You should also see some existing variables.

```ts { actualFilename=./protected/src/.env.template endLine=3 startLine=1 statedFilename=Defaults and API Token url=https&#x3A;//gitlab.com/fullstackio/books/langchainjs-bootcamp/module_05/lesson_05.04/protected/src/.env.template }
LANGCHAIN_TRACING_V2=true
LANGCHAIN_ENDPOINT=https://api.smith.langchain.com
LANGCHAIN_API_KEY=<YOUR_API_TOKEN>
```

You should have `LANGCHAIN_TRACING_V2` set to true and `LANGCHAIN_ENDPOINT` set to **_"<https://api.smith.langchain.com>"_**. The endpoint can be altered to self host Langsmith. It's useful if you have sensitive data.

Now go back to the homepage and create a project. Give it a name and leave the other fields blank. Add the value to `LANGCHAIN_PROJECT`.

```ts { actualFilename=./protected/src/.env.template endLine=4 startLine=4 statedFilename=Project Name url=https&#x3A;//gitlab.com/fullstackio/books/langchainjs-bootcamp/module_05/lesson_05.04/protected/src/.env.template#L4 }
LANGCHAIN_PROJECT=<YOUR_PROJECT_NAME>
```