Marcos developed runtime disablement control for OpenTelemetry instrumentation in the discord/opentelemetry-erlang repository, allowing deployments to skip startup and supervision when the OTEL_SDK_DISABLED environment variable is set. This backend feature, implemented in Erlang, reduces startup and instrumentation overhead by enabling dynamic toggling of observability components. Marcos also addressed a compatibility issue by restoring the export of record/5 in otel_meter_noop.erl, ensuring correct operation across environments. The work focused on environment configuration and observability, improving deployment safety and maintainability. The depth of the changes reflects careful attention to operational flexibility and long-term support for evolving backend requirements in production systems.