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The Crash Test Nobody Runs: What I Learned About "Exactly-Once" Building AI Workflows in n8n

This story is from 2026-10-11. It is preserved in the archive; the latest stories are on the live feed.

This is part of my build-in-public series: I am shipping a small store of n8n workflow templates ( AI Automation Lab ) and a free open-source lab on GitHub . I used to believe my n8n workflows were reliable because the execution list was green. Then a payment-notification workflow sent the same ema…

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  1. 2026-10-11 09:48 · DEV Community — AI
    The Crash Test Nobody Runs: What I Learned About "Exactly-Once" Building AI Workflows in n8n

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