During October 2025, Brchamp enhanced the aws/aws-sam-cli repository by improving the local invoke feature to support a wider range of Lambda function identifier formats, including ARNs, partial ARNs, and nested stack references. They developed a normalization utility in Python to parse and validate these identifiers, streamlining the invocation process for developers. By refining error handling to raise specific ValidationExceptions for invalid function names, Brchamp reduced debugging time and improved reliability. Their work focused on CLI development and unit testing, resulting in a more predictable and user-friendly local testing experience for developers working with AWS Lambda and the SAM CLI.