A good local environment is a documented model of production, not a production clone

Situation

A production environment and a developer laptop will never be completely identical. Pretending they are only creates hidden differences. For Columbia Games WordPress, the domain, TLS termination, filesystem and data handling naturally differed, while PHP and WordPress behaviour needed to stay close enough for meaningful testing.

Approach

I listed environmental differences explicitly and pursued parity at the layers that actually affect application behaviour. The local reverse proxy kept its own development-specific logic, while runtime versions and extensions remained controlled. Documentation did not promise 'the same as production'; it stated precisely which parts were equivalent and which were intentionally different.

Outcome

During debugging, it became easier to tell an environment-specific difference from a genuine application defect. The team did not need to reproduce the entire production topology on laptops, yet upgrades and plugin changes could still be tested with reliable behavioural parity.