As a follow-up to https://github.com/openai/codex/pull/3439, this adds a CI job to ensure the codegen script has to be updated in order to change `codex-rs/mcp-types/src/lib.rs`.
mcp-types
Types for Model Context Protocol. Inspired by https://crates.io/crates/lsp-types.
As documented on https://modelcontextprotocol.io/specification/2025-06-18/basic:
- TypeScript schema is the source of truth: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-06-18/schema.ts
- JSON schema is amenable to automated tooling: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-06-18/schema.json