Worked on the stripe/stripe-cli repository to implement Client Environment Overrides for Stripe Samples, addressing issues with environment variable alignment between backend and client development servers such as React and Vue. This feature updated the .cli.json schema to support per-client environment overrides, ensuring correct port handling and resolving broken redirect flows in sample applications. The approach included developing a comprehensive test matrix to validate override and fallback behaviors, using Go for backend development and testing. Additionally, groundwork was laid for propagating these changes across related stripe-samples repositories, improving end-to-end sample reliability and streamlining the developer onboarding process for client integrations.