Articles you can check.

How to build your first tool of your own with an AI agent over a weekend: seven steps at a glance and a free guide with an example project, sent to you by email.

One concrete workflow with n8n and Make: check required fields, detect duplicates, keep errors visible. With a free test pack, documented limits of the evidence and a calculation based on your own figures. The local n8n test ran on 6 September 2026; n8n Cloud and the Make cloud run are still open. The package documentation and test data are in German. This track is partly funded through advertising or affiliate links to n8n and to Make.

• Request to task with n8n
• The same workflow with Make
• Test pack & error cases
• Cloud, self-hosted or manual?
• Methodology & funding

A practical way to find out what a passing check actually proves, with a worked example and a worksheet for your own workflow.

Trace one requirement through the check, introduce a known defect in a safe copy, and keep a finding you can act on. Includes a free editable worksheet.

An astrophysics paper went through an internal pipeline of four agent roles, including a context-separated cross-check with its own research. Across eleven checked key claims: no contradiction finding — and still nine recorded interventions between draft and release, from number corrections to two rejected image candidates.

• Subject reviewed: Tzanidakis & Davenport 2026, arXiv:2603.10952
• Data chart built from cited raw values, in three versions

A “Kleingewerbe” — a small sole-trader business that need not be entered in the commercial register — is registered at the Gewerbeamt or Ordnungsamt of your municipality, typically for 10 to 60 €. This page summarizes the five registration steps, the costs, the deadlines and the §19 UStG thresholds of 25,000 € for the prior year and 100,000 € for the current year, each figure linked to its official source.