DevGenius - AWS Solution Builder

DevGenius turns a plain-language idea into a complete, ready-to-deploy AWS solution: an architecture diagram, a cost estimate, infrastructure as code in CloudFormation, CDK, and Terraform, and full technical documentation. It is an AI application built on Amazon Bedrock, grounded in current information through the Amazon Bedrock AgentCore managed Web Search tool.

v2 rewrite. The UI is a professional React + Cloudscape single-page app (replacing the original Streamlit app), the backend is fully serverless, and the old Bedrock Knowledge Base + OpenSearch retrieval has been replaced by the AgentCore Gateway web-search connector. The only external data dependency is web search - everything else runs in your account.

What you can do

• Build a solution conversationally. DevGenius asks a few discovery questions, then designs a complete solution, searching the web for the latest AWS services, pricing, and best practices and citing its sources.
• Analyze an existing architecture by attaching a diagram image (or a hand-drawn sketch) in the chat; DevGenius explains it and helps you refine it.
• Generate artifacts for the finalized design, streamed live as they're written:
• Monthly cost estimate with current pricing
• Architecture diagram (draw.io / diagrams.net) rendered in-app, with an "Edit in draw.io" link to tweak it
• AWS CDK (TypeScript), CloudFormation (YAML), and Terraform (HCL)
• Comprehensive technical documentation (rendered as formatted HTML)
• Keep your history. Past conversations live in the left sidebar; open one to restore its full transcript and every generated artifact, or delete it (and all its artifacts) with one click.
• Download any artifact, or a zip bundle of everything.

Architecture

                          ┌───────────────────────────────────────────────┐
   Browser (SPA)          │                    AWS account                 │
  React + Cloudscape      │                                                │
        │                 │   CloudFront (OAC) ─── S3 (static site)         │
        │  Cognito login  │                                                │
        ├────────────────▶│   Cognito User Pool                            │
        │  ID token        │                                               │
        │  (Bearer JWT)   │   API Gateway (HTTP API, JWT authorizer)        │
        └────────────────▶│         │                                      │
                          │         ▼                                      │
                          │   Lambda (Python)  ─── DynamoDB (conversations, │
                          │    async job worker      sessions, feedback,    │
                          │    Bedrock Converse       jobs)                 │
                          │    + streaming        ─── S3 (artifacts)        │
                          │         │ web_search tool                       │
                          │         ▼                                       │
                          │   AgentCore Gateway ─── managed web-search      │
                          │   (MCP, AWS_IAM)          connector             │
                          │         │                                       │
                          │         ▼                                       │
                          │   Amazon Bedrock (Claude)                       │
                          └───────────────────────────────────────────────┘

• Frontend - React + TypeScript + Vite + Cloudscape, hosted on S3 and served through CloudFront with Origin Access Control. A conversation-history sidebar, a bottom-pinned chat input with image attach/preview, live streaming output, and a side panel for the generated artifacts.
• Auth - Cognito User Pool for sign-in (via the Amplify Authenticator). The browser sends the Cognito ID token as a bearer credential.
• API - an API Gateway HTTP API with a Cognito JWT authorizer. Long generations (diagrams, docs, IaC with live web search) exceed API Gateway's ~30s limit, so chat and generate run as async jobs: the request returns a jobId immediately, a background Lambda does the work and streams partial output, and the client polls for the result.
• Backend - a Python Lambda running an Amazon Bedrock Converse loop with one tool, web_search. It continues past token limits so long artifacts finish completely.
• Web search - an AgentCore Gateway with the managed web-search connector target. The Lambda calls it over MCP (SigV4-signed) whenever the model requests a search. This fully replaces the Knowledge Base + OpenSearch.
• State - DynamoDB tables for conversations, sessions, feedback, and async jobs; S3 for generated artifacts and downloadable bundles. All timestamps are recorded in US Eastern Time.

Prerequisites

• An AWS account and credentials configured (aws configure or SSO).
• Node.js 18+ and Python 3.13 (for the Lambda runtime).
• The AWS CDK CLI is installed automatically as a dev dependency (npx cdk).
• Amazon Bedrock model access enabled for the model you use (default us.anthropic.claude-sonnet-4-6) in the deployment Region.
• Deploy in a Region that offers the AgentCore web-search connector: us-east-1, eu-west-1, or ap-northeast-1 (default: us-east-1).

Deploy (one click)

./deploy.sh

This installs dependencies, builds the SPA, bootstraps the environment, and deploys the stack. When it finishes, open the AppUrl output, sign up with an email, confirm the code, and start building.

Options:

STACK_NAME=my-devgenius ./deploy.sh          # custom stack name
CDK_DEPLOY_REGION=eu-west-1 ./deploy.sh       # supported Region

Override the model:

npx cdk deploy -c stackName=dev-genius-stack -c modelId=us.anthropic.claude-sonnet-4-6

Local development

The SPA reads its configuration at runtime from /config.json. After a deploy, copy the stack outputs into frontend/public/config.json:

cp frontend/public/config.example.json frontend/public/config.json
# edit region, userPoolId, userPoolClientId, apiUrl
cd frontend && npm install && npm run dev

Clean up

npx cdk destroy -c stackName=dev-genius-stack

This removes all resources created by the stack, including the DynamoDB tables and S3 buckets (auto-delete is enabled). This is irreversible.

Project structure

├── deploy.sh                 # one-click build + deploy
├── cdk.json                  # CDK entry (lib/index.ts)
├── lib/
│   ├── index.ts              # the entire serverless stack
│   └── lambda/api/           # backend Lambda (Python)
│       ├── handler.py        # API router + async job worker
│       ├── bedrock.py        # streaming Converse loop with the web_search tool
│       ├── websearch.py      # AgentCore Gateway MCP client (SigV4)
│       ├── prompts.py        # system + artifact prompts
│       └── storage.py        # DynamoDB + S3 helpers (ET timestamps)
└── frontend/                 # React + Cloudscape SPA
    ├── src/
    │   ├── App.tsx           # auth shell + top navigation
    │   ├── Console.tsx       # layout: history sidebar, chat, artifacts panel
    │   ├── api.ts            # backend client (bearer ID token, job polling)
    │   ├── config.ts         # runtime config loader
    │   └── components/       # ChatArea, ConversationList, ArtifactsPanel,
    │                         #   DiagramViewer, Markdown
    └── public/config.example.json

Security notes

This is a sample. Before production use:

• The API Gateway HTTP API is protected by a Cognito JWT authorizer; only signed-in users can call it. Consider adding AWS WAF to CloudFront and the API, and enabling CloudFront/S3 access logging.
• S3 buckets block all public access; the SPA is served only through CloudFront (Origin Access Control).
• Restrict the Lambda's Bedrock IAM actions to specific model ARNs, and review the Cognito password policy and advanced-security settings.

License

Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.