Haystack

Whether you’re auditing an unfamiliar codebase or cleaning up years of template drift, Haystack gives you a clear, data-backed view into what your site is actually doing - so you can simplify with confidence.

ARC Haystack is a development and debugging addon for ExpressionEngine that provides detailed tracking of which templates, partials, and variables are used to generate any given page. It helps developers understand template dependencies, debug complex template structures, and audit template usage patterns.