During June 2026, contributed to both google/guava and google/adk-python by delivering targeted improvements focused on developer experience and system reliability. Enhanced the Guava repository by expanding HostSpecifier documentation, clarifying its compatibility with java.net.URI parsing and detailing accepted input formats. In google/adk-python, implemented robust path validation for local evaluation workflows, rejecting unsafe identifiers to protect filesystem integrity. This work included updates to core managers and the addition of regression tests to ensure ongoing correctness. Leveraged Java and Python, applying backend development, path validation, and unit testing skills to strengthen baseline validation and improve guidance across both codebases.