The Prompt FilesCase File № 07 · life admin
The 2-Cent-a-Day Inbox Triage
Receipts on file
| Agent | n8n + OpenAI classifier |
|---|---|
| Category | life admin |
| Outcome | Full inbox triage running at about $0.02/day; runnable workflow published |
| Filed | September 12, 2026 · documented in a public report on Reddit |
The Job
An automation builder set up a workflow that classifies every incoming Gmail into five buckets — new enquiry, invoice, supplier, urgent, noise — and labels each message automatically. It costs roughly two cents a day on a personal inbox, and the author shared the runnable workflow plus the implementation gotchas they hit along the way.
The Prompt — try it yourself
Build me an inbox triage: watch my Gmail, classify each new message as client, bill, urgent, or noise, label it, and give me a 3-line morning digest of only the urgent ones. Keep a log so I can audit its decisions.
Field note: swap the bracketed details for your own, keep the approval steps — and make the agent show its work before it acts. That's the whole trick.— V.
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