Broken References to protocol.rs and agent.rs in codex-rs/docs/protocol_v1.md

What is the type of issue?

Documentation is incorrect

What is the issue?

The codebase structure had evolved since the documentation was written:

• Protocol definitions moved
• Agent implementation consolidated
• File references are broken
• The old links results in 404 errors for anyone trying to find the actual protocol definitions

Where did you find it?

_No response_