compatibility-budget

Overview

Without an explicit budget, "compatibility" creeps:

• An engineer adds a Firefox-only fix; the team commits to Firefox forever.
• A user complains about Internet Explorer; an engineer checks for IE; tests now must run on IE.
• A new Chrome version breaks something; the team scrambles reactively.

A compatibility budget is a deliberate decision: which configurations the team commits to support, at what tier, with what consequences for unsupported configurations.

When to use