NilVN shared core — the project document model (IR), command / plugin-manifest schemas, script-package format and serializers

NilVN — a tiny DOM-based ADV / visual-novel engine with story-like script syntax and a capability-sandboxed plugin host

NilVN plugin SDK — manifest types and validator, extension-point / permission catalogs, runtime plugin types, a package template and the generated plugin-spec.json contract

The first-party NilVN plugins — text / character / screen / object effects, sprite animation, keyframe choreography, replays, the in-game menu — as runtime modules, manifests and a batteries-included engine bundle