Worked on the flipperdevices/u-boot repository to enhance runtime environment variable management by developing a new helper function, env_set_runtime. This feature, implemented in C for embedded systems, conditionally sets environment variables based on the CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG configuration. The approach ensures that environment variables are only updated at runtime when the relevant configuration is enabled, mirroring existing behavior while preventing unintended changes when the configuration is unset. The work included thorough documentation and full patch sign-offs, improving maintainability and deployment safety. The contribution focused on system configuration, aligning build-time and runtime operations for greater flexibility across device deployments.