Amazon Bedrock Agent Core: Build a Streaming Agent UI Without Lambda (WebSockets + Memory + Tools)
Johannes is joined by Andres Moreno, a principal software architect and serverless/AI community builder, to build a hands-on demo using Amazon Bedrock Agent Core.
They discuss why Agent Core runtime can be more cost-effective than running agents on Lambda (not paying for LLM “thinking” time), and how Agent Core’s modules (especially runtime and memory) can be used independently or together.
The episode walks through creating an agent with Strands Agents, adding a system prompt for behavior, deploying via a simple “direct deploy” ZIP-to-S3 approach with SAM, and then enabling native WebSocket streaming directly from the UI to Agent Core to remove API Gateway/Lambda middle layers.
They also add short-term memory via Session Manager and demonstrate turning a chatbot into an agent by adding a tool to execute Python code.
00:00 Welcome and Agenda
01:08 Meet Andres Moreno
03:11 Why Agent Core Runtime
05:35 Agent Core Modules Overview
07:22 Skipping the Middleman
10:44 Defining the Agent Code
14:13 System Prompt Guardrails
19:15 Deploying with SAM
24:34 Testing with Simple UI
25:42 Next Up WebSocket Streaming
26:25 Switching to Nova
27:01 WebSocket Streaming Setup
29:09 Presigned URL UI Connect
30:38 Streaming Demo Comparison
33:36 Adding Session Memory
36:16 Deploy Memory and Test
39:35 Chatbot vs Agent Tools
41:01 MCP and Gateway Options
42:12 Run Code Tool Demo
47:15 Wrap Up and Next Steps
Reach out to Andres: / andmoredev
https://www.believeinserverless.com/