gen-caixa-bridge 0.1.3

gen — typed bridge between pleme-io's caixa SDLC primitive and the gen ecosystem. (defcaixa …) blocks declare a :gen slot; this crate translates the typed CaixaToGen request into an AdapterRoute the caixa renderer can act on. The first M9 milestone; full caixa-side wiring (caixa-author skill update, feira render integration) lands when the typed surface stabilizes.