During January 2026, Chen Xu developed the R2 Bucket Location Immutable After Creation feature for the cloudflare/terraform-provider-cloudflare repository. This work focused on backend development using Go and Terraform, ensuring that once an R2 bucket is created, its location remains unchanged, thereby preserving configuration integrity for users managing infrastructure as code. Chen implemented plan modifiers and comprehensive tests to guarantee that location changes are ignored after creation, addressing potential drift and enhancing reliability. The approach demonstrated a solid understanding of Go-based provider development, with attention to CI hygiene and maintainability, resulting in a robust solution for Cloudflare’s Terraform provider.