Amazon Q Rules Except It Doesn't At All

AWS Morning Brief for the week of September 2nd, 2025, with Corey Quinn.

Links:

• How Ancestry optimizes a 100-billion-row Iceberg table
• Mastering Amazon Q Developer with Rules 
• Bob’s Used Books: Build a .NET Serverless Application on AWS – Part 2: Architecture
• How Amazon Finance built an AI assistant using Amazon Bedrock and Amazon Kendra to support analysts for data discovery and business insights 
• Building Your Open Source Commercial Strategy with AWS
• How to optimize Amazon RDS and Amazon Aurora database costs/performance with AWS Compute Optimizer
• Gracefully handle failed AWS Lambda events from Amazon DynamoDB Streams
• Announcing the AWS Billing and Cost Management MCP server
• AWS joins the DocumentDB project to build interoperable, open source document database technology
• Count Tokens API supported for Anthropic’s Claude models now in Amazon Bedrock