The **hof‑behaviour‑hooks** package adds a lightweight hook system to the Home Office Forms (HOF) form controller pipeline. By mixing the module into a controller (e.g., with mixwith.js), developers can attach custom functions to predefined “pre‑” and “post‑” events for GET and POST lifecycle methods (such as _getValues, _render, _process, _validate, etc.)—either globally or per‑field—enabling flexible extension of form behaviour without modifying the core controller. It is aimed at developers building or customizing HOF‑based government web forms.