constants-governance

Prevent NaN propagation by adding safe-number guards and zero-guards around arithmetic boundaries in your financial engine, stopping undefined or Infinity values from corrupting downstream financial calculations.

Manage shared financial constants by centralizing default values in a single shared constants file, then use a client barrel pattern to re-export them so server and client codebases use identical fallback values.

Detect hardcoded magic numbers in financial model tests by running automated hardcoded-number detection tests that verify all test expectations derive from the shared constants file rather than literal values.

Inconsistent default values occur when financial constants are not centralized in a single shared file, causing server and client codebases to use different fallback values across the hospitality financial model.

You need a client barrel pattern to enforce consistent financial defaults when your architecture requires re-exporting shared constants while also defining client-only presentation defaults separately from server values.

Add safe-number guards to financial arithmetic boundaries whenever you are adding or changing financial defaults, diagnosing NaN incidents, or performing loan calculations to prevent undefined values from propagating.