fix(core): await plugin readiness

packages/opencode/src/agent/agent.ts

@@ -30,6 +30,7 @@ import { ModelV2 } from "@opencode-ai/core/model"
 import { LocationServiceMap } from "@opencode-ai/core/location-layer"
 import { Reference } from "@opencode-ai/core/reference"
 import { Location } from "@opencode-ai/core/location"
+import { PluginV2 } from "@opencode-ai/core/plugin"
 
 export const Info = Schema.Struct({
   name: Schema.String,
@@ -99,6 +100,7 @@ export const layer = Layer.effect(
         const cfg = yield* config.get()
         const skillDirs = yield* skill.dirs()
         const referenceDirs = yield* Effect.gen(function* () {
+          yield* (yield* PluginV2.Service).wait(PluginV2.ID.make("core/config-reference"))
           return (yield* (yield* Reference.Service).list()).map((reference) => reference.path)
         }).pipe(Effect.provide(locations.get(Location.Ref.make({ directory: AbsolutePath.make(ctx.directory) }))))
         const whitelistedDirs = [