ECS-based window manager
Engawa (縁側) — typed render-graph IR for pleme-io GPU consumers. Bevy-inspired render-graph design distilled to mado-shaped needs: no ECS, no game loop, no asset pipeline. Pure-data IR + topo sort + cycle detection + integration with garasu's headless GPU primitives.
Kanchi (感知 — "sensing") — typed environment-discovery primitive: declare detection axes, get the FALLBACK const + detect()→Option + detect_or_fallback() trio generated. The shikumi `discovered()` tier made declarative.