Playbook

A build log with the receipt as proof

Document building something real with the product over a defined window, ending on a concrete artifact — a shipped feature, an invoice, a working app.

The artifact is the credibility. A developer or technical audience trusts what was actually shipped over a description of what's possible. Fits when: The audience is technical or project-based, and the product has a real end state (an app, a feature, a finished piece) rather than an ongoing service.