This repository is the OpenConfig public YANG models repository, a collaborative effort by network operators to develop vendor-neutral YANG data models for managing network devices. It contains hundreds of YANG modules covering configuration and operational state for routing protocols (BGP, OSPF, ISIS, MPLS, Segment Routing), interfaces, ACLs, QoS, optical transport, platform components, security, telemetry, and more. The models follow consistent patterns: config/state separation, identity-based extensibility, and augmentation-based composition. The repository also includes CI workflows for validation (pyang, goyang, yanglint), documentation, and release management. While not an application with runtime code, it serves as a foundational schema library for network automation and telemetry systems. The codebase is well-maintained with active development, frequent revisions, and a formal release process.