config-transparency-centralized

Preventing silent fallbacks requires enforcing explicit, transparent configuration by mandating that all parameters reside in `.env` files, using `.env.example` as the ground truth, and failing loudly on missing variables instead of applying undocumented defaults.

Your application crashes because transparent configuration mandates failing loudly with immediate, clear error messages when required variables are missing, deliberately prohibiting hidden variables and undocumented defaults.

The best way to centralize environment variables for onboarding is using `.env.example` as the definitive contract, ensuring all configurable parameters are visible and documented so new developers can immediately understand necessary variables and avoid startup issues.

To ensure all env variables are explicitly declared and visible, mandate that every configurable parameter resides in `.env` files with `.env.example` serving as the ground truth, prohibiting hidden variables and enforcing maximum transparency.

No, you cannot use hidden configuration variables with a fail fast configuration approach because it enforces maximum transparency, requiring explicit declaration of all parameters in `.env` files and prohibiting hidden variables, silent fallbacks, or undocumented defaults.

You need to use `.env.example` as the ground truth for configuration when enforcing a centralized, transparent philosophy to eliminate undocumented defaults, ensuring all required environment variables are explicitly defined and visible to prevent startup issues.