Duplicate Codex accounts warning: what it means

Seeing “Duplicate Accounts Detected” is not an error. CodexUse found two or more saved accounts tied to the same OpenAI identity and is telling you up front that they share one rate limit, so opening one instead of the other won't buy you more headroom. Nothing is blocked.

Why the warning appears

• CodexUse derives a rate-limit identity from the OpenAI login it receives. When two saved accounts resolve to the same identity, it flags them.
• Only OpenAI accounts are checked for duplicates. Custom-model accounts have no OpenAI identity.
• Headroom treats those accounts as one pool, so moving between them adds no extra quota.

What to do about it

• If the accounts really are the same OpenAI identity, keep one and remove the duplicate.
• If you keep several on purpose, that's fine. Remember that the limit is shared. The second entry buys separation, not extra headroom.
• Give each account a clear name (for example, “Workspace seat A” and “Workspace seat B”) so you can tell which window you are in.

How to dismiss the notice

• Click the close icon on the warning. CodexUse remembers the dismissal locally.
• It returns only when the set of duplicates changes, so you'll still catch any new overlap.

Other signals that rely on account IDs

• Headroom is shown per rate-limit identity, so duplicates share one meter.
• Auto-roll can move within the duplicate pool, but it can't escape the shared limit.
• Open and Show keep working on every account. The warning never blocks an action.

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