Arun developed and enhanced Terraform provider features in the opentofu/terraform-provider-tfe and hashicorp/go-tfe repositories, focusing on speculative execution and stack enablement. He introduced the speculative_enabled attribute for Terraform Enterprise Stack resources, integrating it into the provider model with default handling and comprehensive test coverage. Arun also enabled stacks_enabled at both organization and stack levels, updating tests to validate configuration behaviors. He upgraded the go-tfe dependency to v1.101.0, aligning client libraries with new provider capabilities. His work involved Go, Terraform, and infrastructure as code, emphasizing robust integration testing, documentation updates, and regression protection to ensure reliable, maintainable backend systems.