Before writing proto code, review existing .proto files in the project. Match conventions for naming, field ordering, structural patterns, validation, and documentation style.
If none exists, ask the user what style should be used or an existing library to emulate.
Check for a Makefile first—many projects use make lint or make format.
Use when working with Protocol Buffer (.proto) files, buf.yaml, buf.gen.yaml, or buf.lock. Covers proto design, buf CLI, gRPC/Connect services, protovalidate constraints, schema evolution, and troubleshooting lint/breaking errors. Source: bufbuild/claude-plugins.