01
Chris
“We should own this critical path.”
The dependency’s last release was three years ago.
FIELD REPORT 007
This time we’ll do it properly
The clean-room implementation encounters its first customer.
REQUEST
A critical dependency is old, weird and barely maintained.
02
Alex
“A rewrite lets us fix the model instead of copying the mistakes.”
The new architecture is genuinely beautiful.
03
Jo
“The old one still works.”
She closes another compatibility ticket.
04
Six months later
Legacy: 94% of production traffic. Rewrite: 100% of the architecture documentation.
Both are now critical systems.
OBSERVED BEHAVIOR