feat(core): add location-scoped config loading (#29625)

packages/core/src/config/experimental.ts

@@ -0,0 +1,18 @@
+export * as ConfigExperimental from "./experimental"
+
+import { Schema } from "effect"
+import { Catalog } from "../catalog"
+import { Policy as PolicyV2 } from "../policy"
+
+// Each core domain exports the policy actions it supports. Adding an action to
+// this union makes it valid in authored config while keeping Policy generic.
+export const PolicyAction = Schema.Union([Catalog.PolicyActions])
+
+export class Policy extends Schema.Class<Policy>("ConfigV2.Experimental.Policy")({
+  ...PolicyV2.Info.fields,
+  action: PolicyAction,
+}) {}
+
+export class Experimental extends Schema.Class<Experimental>("ConfigV2.Experimental")({
+  policies: Policy.pipe(Schema.Array, Schema.optional),
+}) {}