Set up and configure devenv developer environments. Use when the user wants to create a devenv.nix, add languages, services, packages, or configure a reproducible development environment.
This skill should be used when the user asks to "create a language module", "add a new language", "write a language module for", "implement language support for", or wants to add a new language to src/modules/languages/. Provides the patterns and conventions for devenv language modules.
This skill should be used when the user asks to "create a service module", "add a new service", "write a service for", "implement a service module", or wants to add a new service to src/modules/services/. Provides the patterns and conventions for devenv service modules.