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Chatbot Portal with Agent

Chatbot Portal with Agent: Streamlined Workflow for Building Agent-Based Applications

Chatbot Portal with Agent offers a streamlined workflow for developing scalable, production-grade agent-based applications, such as conversational chatbots. Key features include:

1. Enterprise Knowledge Base Creation: Users can upload private documents in various formats (PDF, DOCX, HTML, CSV, TXT, MD, JSON, JSONL, PNG, JPG, JPEG, WEBP) to construct a personalized knowledge base.

2. Flexible Mode Options: Choose from multiple modes (Agent, Chat, RAG) to suit diverse requirements. For instance, the Agent model can interpret user intent, select appropriate tools, and act on iterative results.

3. Configurable Chat-Based UI: Our React/Next.js chat interface is user-friendly, making it easy to configure, explore, and customize to meet your specific needs.

4. Comprehensive RESTful API: Our full-featured API facilitates easy integration with existing applications, enhancing functionality and user experience.

Chatbot Portal with Agent is designed to empower developers to rapidly deploy intelligent, context-aware applications with minimal overhead and maximum efficiency.

Table of Contents

• Architecture
• Quick Start
• API Reference
• FAQ
• Contribution
• License

Architecture

Deploying this solution using the default parameters will build the following environment in Amazon Web Services:

The execution process is as follows:

1. The solution's front-end website is hosted in an Amazon S3 bucket and distributed via Amazon CloudFront. Authentication is provided by an Amazon Cognito user pool.
2. When users upload documents to the knowledge base through the solution's website, the documents are first uploaded to the Amazon S3 bucket.
3. An Amazon Lambda function is then triggered, which in turn triggers an Amazon Step Functions workflow to process the file. Within Amazon Step Functions, the document is parsed and segmented using an Amazon Glue Job, with intermediate states stored in Amazon DynamoDB and Amazon S3.
4. The Amazon Glue Job vectorizes the segmented text blocks using an Embedding model deployed in an Amazon SageMaker Endpoint and injects them into the vector database Amazon OpenSearch. If the document is in image format (e.g., png, webp) or a pdf with images, the Amazon Glue Job uses Amazon Bedrock to interpret the images and convert them to text. Finally, Amazon SNS sends the execution result to the user via email.
5. When users send chat messages through the solution's website, the online module's Amazon API Gateway is triggered. Front-end and back-end communication is achieved via WebSocket API. An Amazon Lambda function integrated with Amazon API Gateway sends the request message to Amazon SQS to prevent message timeout.
6. Messages in Amazon SQS are consumed by the online module's Amazon Lambda, which executes Agent/RAG/Chat logic based on the request parameters and records the chat messages in Amazon DynamoDB. The Amazon Lambda function uses intent recognition to determine the necessary tools and perform the corresponding operations.
7. If the RAG model is selected, the Amazon Lambda function vectorizes the query message using the Embedding model deployed in the Amazon SageMaker Endpoint, retrieves matching knowledge from Amazon OpenSearch, reorders the results, and sends the knowledge to the large language model, which then returns the answer to the front end.
8. During the chat, messages between the user and AI are stored in Amazon DynamoDB. The solution's website retrieves a specific chat record through Amazon API Gateway and Amazon Lambda, allowing the user to continue the conversation based on the content of that chat record.

Enterprise Knowledge Base Construction

Its data preprocessing module includes format recognition, content extraction, metadata conversion, and semantic segmentation, seamlessly in the background.

When a large number of content injection requests are received, it can automatically scale out by running multiple Amazon Glue jobs concurrently, ensuring these requests are processed in time.

Chunk Metadata

Chunk metadata is defined as below shown:

Name	Description
file_path	S3 path to store the file
file_type	File type, eg. pdf, html
content_type	paragraph: paragraph content
current_heading	The heading which the chunk belongs to
chunk_id	Unique chunk id
heading_hierarchy	Heading hierarchy which is used to locate the chunk in the whole file content
title	The heading of current section
level	Heading level, eg. H1 is #, H2 is ## in markdown
parent	The chunk id of parent section, eg. H2's parent is its H1, H3's parent is its H2
previous	The chunk id of previous paragraph at the same Level
child	The chunk ids of sub sections
next	The chunk id of next paragraph at the same Level
size	The number of the chunks when the paragraph is split by a fixed chunk size

Here is an example

{
	"file_path": "s3://example/intelli-agent-user-guide.pdf",
	"file_type": "pdf",
	"content_type": "paragragh",
	"current_heading": "# Intelli-Agent User Guide WebApp",
	"chunk_id": "$1-4659f607-1",
	"heading_hierarchy": {
		"title": "Intelli-Agent User Guide",
		"level": 1,
		"parent": null,
		"previous": null,
		"child": [
			"$2-038759db",
			"$4-68d6e6ca",
			"$6-e9cdcf68"
		],
		"next": null,
		"size": 2
	}
}

Flexible Mode Options

The whole online logic is implemented using LangGraph. The first node is query_preprocess_lambda which handles the chat history. Then the user can choose from two modes: chat and agent. The chat mode lets you interact directly with different LLMs, such as Anthropic Claude 3. The agent mode is the most complex mode which gives you the possibility to handle complex business scenarios. Given the most relevant intention from intention_detection_lambda and chat history from query_preprocess_lambda, agent_lambda will decide which tools to use and whether the information is enough to answer the query. The parse_tool_calling node will parse the output of agent_lambda:

• agent_lambda chooses the wrong tool from the perspective of tool format, it will be forced to think again through invalid_tool_calling edge.
• agent_lambda chooses the valid tool, the tool will be executed through tool_exectue_lambda. Then, agent_lambda will decide whether the running results are enough to answer the query.
• There are some cases that agent_lambda decides to give the final response. For cases needing RAG, the rag_retrieve_lambda and rag_llm_lambda will be called. For cases that agent_lambda needs more information, the give_rhetorical_question node will be executed. For cases where a constant reply needs to be given, the transfer_reply and comfort_reply will be executed. The give_final_response means the current results of tool calling is enough to answer the query.

flowchart TD
 subgraph ToolUse["ToolUse"]
    direction TB
        tools_choose_and_results_generation["tools_choose_and_results_generation"]
        results_evaluation{{"results_evaluation"}}
        tools_execution["tools_execution"]
  end
    _start_["_start_"] --> query_preprocess["query_preprocess"]
    query_preprocess == chat mode ==> llm_direct_results_generation["llm_direct_results_generation"]
    query_preprocess == agent mode ==> intention_detection["intention_detection"]
    intention_detection -- similar query found --> matched_query_return["matched_query_return"]
    intention_detection -- intention detected --> tools_choose_and_results_generation
    tools_choose_and_results_generation --> results_evaluation
    results_evaluation -. invalid tool calling .-> tools_choose_and_results_generation
    results_evaluation -. valid tool calling .-> tools_execution
    results_evaluation -. no need tool calling .-> final_results_preparation["final_results_preparation"]
    tools_execution --> tools_choose_and_results_generation
    llm_direct_results_generation --> final_results_preparation["final_results_preparation"]
    matched_query_return --> final_results_preparation
    final_results_preparation --> _end_
     tools_choose_and_results_generation:::process
     results_evaluation:::process
     tools_execution:::process
     query_preprocess:::process
     llm_direct_results_generation:::process
     intention_detection:::process
     matched_query_return:::process
     final_results_preparation:::process
    style query_preprocess fill:#FF6D00,color:#FFFFFF
    style ToolUse fill:#FFCDD2,color:#D50000

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Quick Start

Follow these steps to get started:

1. Prerequisites
2. Deployment

Prerequisites

Step 1: Install the required dependencies

Execute following commands to install dependencies such as Python, Git, npm, docker and create a service linked role for Amazon OpenSearch service. You can skip this step if they are already installed. The setup_env.sh script is adapted for Amazon Linux 2023. If you are using other operating systems, please manually install these dependencies.

wget https://raw.githubusercontent.com/aws-samples/Intelli-Agent/dev/source/script/setup_env.sh
sh setup_env.sh

Step 2: Install the AWS CLI

Execute the following command to install the AWS CLI if it is not installed.

curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install

You can execute the following command to check the AWS CLI version:

aws --version

Deployment

To deploy the solution, follow these steps:

Step 1: Clone the GitHub repository

git clone git@github.com:aws-samples/Intelli-Agent.git

Step 2: Navigate to the source/infrastructure directory

cd Intelli-Agent/source/infrastructure

Step 3: Install the project dependencies

npm install

Step 4: Run the configuration command to set up the solution with the desired features:

npm run config

You will be prompted to enter the following information:

• Prefix: A prefix for the solution stack name. This prefix will be added to all resources created by the solution.
• SubEmail: The email address to receive notifications.
• KnowledgeBase: Enable or disable the knowledge base feature.
• KnowledgeBaseType: Select the type of knowledge base to enable.
• Chat: Enable or disable the chat feature.
• Connect: Enable or disable the integration with Amazon Connect, it can answer the question from Amazon Connect.
• Model: Select the model to use for the solution.
• UI: Enable or disable the UI feature.

After entering the information, the configuration file config.json will be generated in the source/infrastructure/bin directory. You can rerun the npm run config command or modify this file to customize the solution configuration.

Step 5: Prepare the required deployment resources, including the frontend and model assets

npm run build

Step 6: (Optional) Bootstrap AWS CDK on the target account and region

If this is the first time your account is using CDK to deploy resources, please refer to this document for CDK bootstrap.

npx cdk bootstrap aws://<Your AWS account ID>/<AWS region>

Step 7: Deploy the solution

npx cdk deploy

Step 8: Confirm the deployment

After deployment, you can find a stack containing intelli-agent in the CloudFormation console. On the Output tab of the stack, you can find key solution information, commonly explained as follows:

Name	Description
WebPortalURL	Link to the Intelli-Agent frontend website.
APIEndpointAddress	RESTful API endpoint address primarily used for data preprocessing, chat history, etc.
WebSocketEndpointAddress	WebSocket API endpoint address primarily used for chat functionality.

Updating an Existing Deployment

You can update an existing deployment following these steps:

Step 1: Navigate to the source/infrastructure directory

cd Intelli-Agent/source/infrastructure

Step 2: Adjust the configuration

Rerun the npm run config command, or modify the config.json located under the source/infrastructure/bin directory.

Sample config.json:

{
  "prefix": "",
  "email": "your-email@amazon.com",
  "deployRegion": "us-east-1",
  "knowledgeBase": {
    "enabled": false,
    "knowledgeBaseType": {
      "intelliAgentKb": {
        "enabled": true,
        "email": "support@example.com",
        "vectorStore": {
          "opensearch": {
            "enabled": true,
            "useCustomDomain": false,
            "customDomainEndpoint": ""
          }
        },
        "knowledgeBaseModel": {
          "enabled": true,
          "ecrRepository": "intelli-agent-knowledge-base",
          "ecrImageTag": "latest"
        }
      }
    }
  },
  "chat": {
    "enabled": true,
    "amazonConnect": {
      "enabled": true
    }
  },
  "model": {
    "embeddingsModels": [
      {
        "provider": "sagemaker",
        "name": "bce-embedding-and-bge-reranker",
        "commitId": "43972580a35ceacacd31b95b9f430f695d07dde9",
        "dimensions": 1024,
        "default": true
      }
    ],
    "llms": [
      {
        "provider": "bedrock",
        "name": "anthropic.claude-3-sonnet-20240229-v1:0"
      }
    ],
    "modelConfig": {
      "modelAssetsBucket": "intelli-agent-models-078604973627-us-west-2"
    }
  },
  "ui": {
    "enabled": true
  },
  "federatedAuth": {
    "enabled": true,
    "provider": {
      "cognito": {
        "enabled": true
      },
      "authing": {
        "enabled": false
      }
    }
  }
}

Step 3: (Optional) If you wish to create new sagemaker models, or update frontend assets, run the following command:

npm run build

Step 4: Execute the following command to update the deployment:

aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws
npx cdk deploy

Uninstalling the Solution

To uninstall the solution, follow these steps:

1. Log in to the AWS Management Console and navigate to the CloudFormation page.
2. Select the stack that contains the keyword intelli-agent.
3. Click on the Delete button to initiate the deletion process.

Feature Overview

1. Large Language Model Switching

Currently supports the following LLMs:

• Claude3 Haiku
• Claude3 Sonnet
• Claude3.5 Sonnet

2. Chat Window

The chat area consists of two main functionalities: Chatbot and History. The Chatbot can initiate a new conversation based on supported LLM models. History -> The chat history ID that needs to be restarted will display past chat records on the page. Users can continue their conversation based on it.

3. Document Library (Knowledge Base)

The Document Library (required for RAG) currently supports document creation (one upload at a time) and deletion (multiple deletions at a time).

• Supports 12 document formats: pdf, docx, txt, csv, jsonl, json, html, md, png, jpg, jpeg, webp
• UI upload document size limit: 10MB

Tips:

• If users repeatedly upload the same document name, the backend will overwrite it with the latest document.
• Create Document -> After selecting the file and clicking upload, the backend operation is divided into two parts: document upload and offline processing. Only when both are completed will the status bar display "Completed".
• Example:

4. User Management

The current username is displayed in the upper right corner. Click "Logout" to log out.

5. Interface Display Language Switching

Currently supports Simplified Chinese and English.

API Reference

After CDK deployment, you can use a HTTP client such as Postman/cURL to invoke the API by following below API schema.

• LLM API Schema: send question to LLM and get a response.
• ETL API Schema: upload knowledge to the vector database.
• AOS API Schema: search data in the vector database.

FAQ

Current Model Selection for Each Processing Stage

The current models used in each stage are as follows, selected based on internal team testing and current effectiveness. Customers can customize and replace these models. Detailed model replacement is available.

Function	Model
Rerank	BGE-reranker-large
Embedding	BCE
LLM	Claude3/Claude3.5

How to Get Support

Get support by creating an issue on GitHub.

After Deployment, How to Get Initial Username and Password

During CDK deployment, you specified the SubEmail parameter, which is the email address used for receiving notifications. After a successful CDK deployment, the initial username and password will be sent to this email.

How Documents are Split

Documents of various types are first converted to Markdown format and then split based on paragraphs. If the split paragraphs exceed the maximum token limit (default is 500, customizable in glue-job-script.py), they are split again. The split text blocks and metadata are recorded in an S3 bucket and injected into the vector database after vectorization.

To inject intent data into your system, follow these steps:

Step-by-Step Guide to Inject Intent Data

1. Obtain JWT Token:

   • Refer to the documentation at docs/auth.md to understand how to obtain a JWT token.
   • Use Postman or a similar tool for this process.

2. Injection Using ETL API:

   • Use the schema specified in docs/ETL_API_SCHEMA.md for intent data injection.
   • Below is a sample JSON structure that you can use to inject intent data. Replace the placeholders with your specific S3 bucket and file details:

   {
       "s3Bucket": "your-bucket-name",
       "s3Prefix": "s3path/default-intent.jsonl",
       "offline": "true",
       "qaEnhance": "false",
       "workspaceId": "default-intent",
       "operationType": "create",
       "documentLanguage": "zh",
       "indexType": "qq"
   }

3. Data Injection Format:

   • Use the following JSON format for injecting individual intent data:

   {"question": "Hello", "answer": {"intent": "chat"}}

   • Replace "Hello" with the actual question text.

How to Update Resources Used by ETL

The current solution is undergoing continuous updates, requiring manual updates for the document parsing component.

1. [Optional] Update Document Parsing Model Endpoint

# Input a new ETL tag when executing sh build.sh
cd source/script
sh build.sh -b <S3 bucket name> -i <ETL model name> -t <new ETL tag name> -r <AWS region>

# Input a new ETL tag when executing cdk deploy to trigger ETL endpoint update
npx cdk deploy --rollback true --parameters S3ModelAssets=<Your S3 Bucket Name> --parameters SubEmail=<Your email address> --parameters EtlImageName=<Your ETL model name> --parameters ETLTag=<Your new ETL tag name> --require-approval never

2. Manually Update ETL Dependencies' whl Package

First, confirm the path corresponding to --extra-py-files in your ETL Job.

Next, upload source/lambda/job/dep/dist/llm_bot_dep-0.1.0-py3-none-any.whl to the location where Glue dependencies are stored.

aws s3 cp source/lambda/job/dep/dist/llm_bot_dep-0.1.0-py3-none-any.whl s3://<Your Glue job bucket>/llm_bot_dep-0.1.0-py3-none-any.whl

Testing

For detailed test information, please refer to the Test Doc

Contribution

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.