The Configuration Deployments system at Twilio enables top-level configuration as part of a deployment, decoupling runtime configuration from built artifacts. This allows for predictability, resilience, velocity, and improved engineer experience. The system provides type safety, schema validation, and auditability to application configuration, bridging the developer experience between deploying software to containers and virtual machines. It ensures high availability, allowing for quick, safe, and easy rolling forward or back of configurations during incidents. Application developers create a JSON Schema Specification file to define required configuration values, which are then deployed along with software. The system provides multiple means of accessing configuration, including Chef, HTTP servers, and environment variables, to support various workflows and applications.