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The Backend engine section explains how Darpan works at runtime. The Frontend app pages explain how the Vue application is shaped as a browser control surface. This section explains how to change either side safely: choose the right repository, preserve contracts, and verify the affected surface.

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Engineering model

Darpan engineering starts from the user workflow, keeps UI and backend ownership separate, uses Moqui XML for service contracts, and verifies the changed surface before broad claims.

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How to read this section

These pages cover implementation context rather than product workflow guides.

Engineering process

How changes are discovered, implemented, verified, and documented.

Repo map

Frontend and backend repositories, component paths, and ownership boundaries.

Release discipline

Release principles, review questions, and verification scope.

Frontend PWA philosophy

App shell, route surface model, command-first navigation, and current PWA boundary.

Frontend design system

Shared CSS, component, workflow, and page-surface contracts for frontend pages.