Update README.md

Co-authored-by: Hugo Dutka <[email protected]>

Author: 35C4n0r

README.md

@@ -55,7 +55,7 @@ You can use AgentAPI:
 Run an HTTP server that lets you control an agent. If you'd like to start an agent with additional arguments, pass the full agent command after the `--` flag.
 
 > [!NOTE]
-> When using Codex, make sure to explicitly specify the agent type (for example, `agentapi server -- codex`) after the `--` flag when starting the server.
+> When using Codex, always specify the agent type explicitly (`agentapi server --type=codex -- codex`), or message formatting may break.
 
 ```bash
 agentapi server -- claude --allowedTools "Bash(git*) Edit Replace"