An architecture diagram can show a handler, an authorization service, and a renderer. A new engineer tracing a failed document preview still needs to know which path applies, where access is denied, and which source lines support the explanation.

A useful explanation should let the reader follow that question without losing the connection to the implementation. Living Explainers explores this idea through an authored model that generates a self-contained HTML page.

Start with a request path

The bundled example follows a document preview through validation, access review, and rendering. It contains three authored paths: success, denied access, and renderer timeout.

A reader can choose a path, inspect its steps, and look at source references and assumptions. A question about caller retries is explicitly outside the model's coverage.…