Match edge route resolution before cutover
Routing migrations become fragile when equivalent-looking rules carry different precedence.
Capacity relief depends on a cutover that cannot trade deterministic behavior for simpler implementation.
“One bad rewrite doesn't look like downtime—it looks like we sent shoppers somewhere else.”
Nikos Fontana · Principal Frontend Architect
Operates a global commerce application with locale-specific rewrites and multiple storefronts on shared domains.
What pulls against what
- capacity deadline vs. route correctness
- global consistency vs. exceptional configurations
- automated evidence vs. verified proof
- native control vs. vendor insulation
- customer continuity vs. irreversible cutover
What is at stake
A capacity-driven migration is committed, but route mismatches can create subtle global customer harm. The challenge is proving compatibility before a one-way cutover
Why Vercel
At Vercel, this can matter because global edge delivery depends on routing behavior remaining dependable as underlying systems change.
Written for
This is the setup. The work is inside.
Running it puts you in the room: the full situation and its constraints, stakeholders who push back in their own words, and the decisions that are yours to make. What you produce becomes a Day One Plan — work you can show someone instead of describing.