I was getting this in my Claude code app, it seems clear to me that they didn’t want users to do that anymore and it was deprecated. https://i.redd.it/jvemmk1wdndg1.jpeg
If you're a big context/compaction fan and want another fun fact, did you know that instead of doing regular compaction (prompting the agent to summarize the conversation in a particular way and starting the new conversation with that), Codex passes around a compressed, encrypted object that supposedly preserves the latent space of the previous conversation in the new conversation.
