fix(skills): warn when bundled dir missing

src/agents/skills/bundled-context.ts

@@ -1,6 +1,10 @@
 import { loadSkillsFromDir } from "@mariozechner/pi-coding-agent";
+import { createSubsystemLogger } from "../../logging/subsystem.js";
 import { resolveBundledSkillsDir, type BundledSkillsResolveOptions } from "./bundled-dir.js";
 
+const skillsLogger = createSubsystemLogger("skills");
+let hasWarnedMissingBundledDir = false;
+
 export type BundledSkillsContext = {
   dir?: string;
   names: Set<string>;
@@ -12,6 +16,12 @@ export function resolveBundledSkillsContext(
   const dir = resolveBundledSkillsDir(opts);
   const names = new Set<string>();
   if (!dir) {
+    if (!hasWarnedMissingBundledDir) {
+      hasWarnedMissingBundledDir = true;
+      skillsLogger.warn(
+        "Bundled skills directory could not be resolved; built-in skills may be missing.",
+      );
+    }
     return { dir, names };
   }
   const result = loadSkillsFromDir({ dir, source: "openclaw-bundled" });