fix(tools): harden persistent tool integrations

packages/examples/agent-spine-demo/src/index.ts

@@ -105,7 +105,11 @@ export interface Config {
   sessionTitle?: SessionTitleConfig
   /** Workspace-context loader controls with an explicit byte budget; set `false` for hermetic prompts. */
   workspaceContext: workspaceContext.Config | false
-  /** Skill registry, local provider, and model-facing consumer config. */
+  /**
+   * Skill registry, local provider, and model-facing consumer config.
+   * Skills use `enabled` because one nested config controls a provider stack;
+   * single model-tool plugins use `Config | false` to disable that one consumer.
+   */
   skills?: SkillConfig
   /** Model-facing bash tool config, or false when another plugin owns `bash`. */
   toolBash?: toolBash.Config | false