Add type-safe handler system with phantom-type layers#5

Open

contrasam wants to merge 2 commits intomainfrom

claude/type-safe-handlers-capabilities-ZthqE

Commits on Mar 10, 2026

Add type-safe handler layer system (ZIO-style dependency tracking)
claude
committed
Apply F-bounded polymorphism to builder/factory APIs; add TYPED_LAYERS doc
claude
committed