A manifest layer should outlive any one tool
The point of Rules-as-Code is not to pick a permanent winner between tools. It is to define a portable source of truth that can compile into Cursor rules, CLAUDE.md files, Copilot instructions, and future formats.
Operators need one canonical editing surface
If every target format has to be edited separately, the system eventually drifts. A manifest reduces that by giving teams one place to version meaning and many places to render it.
The commercial surface remains productized
Even if the underlying manifest becomes more systematic, the delivery should still feel practical. Buyers want finished packs, scanners, and conversion tools, not abstract governance theory with no path to execution.