Same idempotency key, different arguments: refuse the mismatch
This story is from 2026-10-09. It is preserved in the archive; the latest stories are on the live feed.
The agent paid the invoice once. Then the model regenerated the tool call for a retry, kept the same idempotency key, and changed the memo field by a few words. The server saw the familiar key, returned the original receipt, and the caller moved on. In the ledger it looks like the corrected call we…
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- 2026-10-09 22:26 · DEV Community — AI
Same idempotency key, different arguments: refuse the mismatch