The result to aim for
Arthur Cormier told Claude Sonnet, for a month, to validate, categorize and link invoices in the accounting tool, and verify VAT. A pass lasts 25 minutes, compared to 10 for the employee; Claude does 80% of the work, the employee keeps the transactions more than 200 €.
What was done
Post LinkedIn public signed (Arthur Cormier, August 14, 2026, page read November 10, 2026). Cost declared: 11.7 € per Claude pass compared to 3.7 € per employee (22 €/h charged); 175 € in total (one pass every two days). 46% of the cost Claude: Chrome extension that clicks. He continues to release 10 minutes a day. Durations and euros are his test, unaudited. Distinct from Cléton (40 PDF, spreadsheet) and Lalau (Evaneos approach).
Before you start
Tool cited by the source: Claude Sonnet; other tools cited: Claude. Fill in the bracketed items: [n lignes]. Strip confidential data that is not needed and check your tool’s access terms. Features and plans can change.
The method, in three steps.
Gather the context
Spot the bracketed items in the prompt (
[n lignes]) and prepare what they ask for.Adapt the prompt
Copy the prompt below, replace the bracketed items, then paste it into Claude.
Reread before using
Reread the result, correct it if needed and keep the final decision. Caveats are detailed below.
Your starting point.
Replace the bracketed items, then adapt the proposal to your situation. This prompt is written by the iadujour desk It is not a quotation from the source.
List of movements (without IBAN): [n lignes]. Invoices of the month (unnamed): [n lignes]. Threshold for a human: 200 €. Offer connections: date, amount, room, VAT. Mark "to be validated" above the threshold. I'm not making up any pieces.
What deserves your attention
Proof level: Public declarative post. Source checked on 10 November 2026. Use described by the source, not tested by the desk. Original summary written by iadujour.fr: figures and claims are the source’s; the prompt is a desk proposal, not a quotation.
Comments.
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