Standalone Codex conversations disappear after upgrading to new ChatGPT desktop app, but local session database is intact

What version of the Codex App are you using (From “About Codex” dialog)?

I don't have "Codex" but I have the new ChatGPT which I understand is replacing Codex.

What subscription do you have?

plus

What platform is your computer?

Darwin 24.5.0 arm64 arm

What issue are you seeing?

Platform

• macOS 15.5 (Apple Silicon)
• ChatGPT desktop app (latest version after the Codex → ChatGPT migration)

What happened

After updating from the standalone Codex desktop app to the new ChatGPT desktop app:

• None of my previous Codex conversations appear in the ChatGPT sidebar.
• They also do not appear on chatgpt.com.
• The new app appears to function normally otherwise.

What steps can reproduce the bug?

1. Install and use the standalone Codex desktop app.
2. Create and use multiple Codex conversations over a period of time.
3. Update to the new ChatGPT desktop app that replaces the standalone Codex app.
4. Launch the new ChatGPT app and sign in with the same OpenAI account.
5. Observe that previous Codex conversations do not appear in the sidebar or elsewhere in the app.
6. Visit chatgpt.com using the same account.
7. Observe that the previous Codex conversations are also not visible there.
8. Inspect the local Codex data:

• ~/.codex/state_5.sqlite contains a populated threads table.
• The referenced rollout .jsonl files contain the conversation transcripts.

Expected result: Previous Codex conversations are visible after the upgrade.

Actual result: The conversations are not shown in the UI, even though the local session database and transcript files still exist.

What is the expected behavior?

After upgrading, my previous standalone Codex conversations should appear in the new ChatGPT desktop app (or there should be a documented migration/import step if required).

Additional information

Evidence that the data still exists

I inspected the local Codex data and found:

• ~/.codex is approximately 1.4 GB.
• ~/Library/Application Support/Codex is approximately 815 MB.
• ~/.codex/state_5.sqlite contains a populated threads table.
• The threads table references the rollout .jsonl files for my historical conversations.
• I opened one of those .jsonl files and confirmed that the conversation transcript is present.

This suggests the conversation history still exists locally but is not being surfaced by the new ChatGPT application.