v0.6.0

First publish of five packages (all 0.1.0): foldkit-bundle (reusable Submodel placements), foldkit-bundle-surface (Module contracts), foldkit-primitives (ready-made media/net/time/state/motion/device/events/observers/dom), foldkit-react (islands, Ports, Suspense), foldkit-react-codegen (view-to-TSX compiler). Also: agent skill, wiring guides, TestClock listener-settling and TS-version lessons recorded in AGENTS.md.