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Check these nine boundaries before you put your agent backend in front of people.

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Review each boundary

Each row is a rule the owning page explains in full. The pattern behind all of them is the same: commit before you acknowledge, retry with the same key, and keep credentials where only your server can read them.

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When it fails

The failures these rules prevent look alike from the outside: a reply sent twice, a reply never sent, or a message that arrived while your backend was down. Start from the identifiers on the debugging page. The event_id tells you whether an event was delivered twice, and the trace_id matches a request to Relay’s own record of it.

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Next steps