[e1g]

Yes, Codex compaction is in the latent space (as confirmed in the article):

> the Responses API has evolved to support a special /responses/compact endpoint [...] it returns an opaque encrypted_content item that preserves the model’s latent understanding of the original conversation

[xg15]

Is this what they mean by "encryption" - as in "no human-readable text"? Or are they actually encrypting the compaction outputs before sending them back to the client? If so, why?

[e1g]

"encrypted_content" is just a poorly worded variable name that indicates the content of that "item" should be treated as an opaque foreign key. No actual encryption (in the cryptographic sense) is involved.