Worked on the pulumi/opentofu repository to enhance documentation supporting cross-engine version-constraint compatibility between OpenTofu and Terraform. Focused on creating clear guidance in Markdown, the developer authored a comprehensive version-constraints.mdx file that explains how to use a providers.tofu file to specify OpenTofu version constraints and override those in providers.tf for dual-engine modules. Included a concrete example to illustrate dual compatibility, making it easier for teams to adopt both engines. The work emphasized documentation skills and Markdown proficiency, reducing configuration complexity and streamlining onboarding for developers transitioning between OpenTofu and Terraform without addressing bug fixes during this period.