import type { Binding } from "../capability-model/types.js";

/** Nominal library identity. Backends implement primitives; target names carry no
 * built-in semantics in the graph planner. The JS backend is installed by the
 * current toolchain, alongside the authoritative server executor. */
export const javascriptTarget = "target:org.quixos.execution.javascript@1";
export interface NativeExecutionBackend {
  readonly target: string;
  readonly supports: (binding: Exclude<Binding, { kind: "interface" }>) => boolean;
}
export const standardNativeBackends: readonly NativeExecutionBackend[] = [
  { target: "server", supports: () => true },
  {
    target: javascriptTarget,
    supports: (binding) =>
      binding.kind === "state" ||
      binding.kind === "edge" ||
      binding.kind === "journal" ||
      (binding.kind === "subscription" && binding.primitive === "status"),
  },
];