#mvu-pattern

Model-State Gating vs. Idempotency Keys for HTTP Write Retries

Preventing Duplicate Writes in Elm MVU When implementing retry logic for HTTP POST requests in Elm 0.19+, ensuring that a single user action does not result in duplicate server-side records is a critical design constraint. Because the Elm runtime manages Cmd execution, multiple triggers of the same effect can lead to redundant writes if the network is unstab