An operation is idempotent if applying it multiple times has the same effect as applying it once. Idempotency lets clients and systems retry requests safely after timeouts or failures without duplicate side effects.
Idempotency - Interview Concepts - ExtraBrain is part of ExtraBrain's local-first Mac workflow for live interviews, meetings, transcription, provider control, and responsible AI use.
An operation is idempotent if applying it multiple times has the same effect as applying it once. Idempotency lets clients and systems retry requests safely after timeouts or failures without duplicate side effects.
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Networks fail and clients retry, so operations must tolerate duplicates without double-charging or double-writing.
A unique key per request lets the server detect and ignore duplicate submissions.
GET, PUT, and DELETE are defined as idempotent, while POST usually is not.
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Because a client that retries after a timeout must not cause a second charge or a duplicate record.
Use idempotency keys, conditional writes, or design the operation so repeats have no additional effect.
