refactor: centralize skills prompt resolution

src/agents/skills.ts

@@ -610,6 +610,24 @@ export function buildWorkspaceSkillsPrompt(
   return formatSkillsForPrompt(eligible.map((entry) => entry.skill));
 }
 
+export function resolveSkillsPromptForRun(params: {
+  skillsSnapshot?: SkillSnapshot;
+  entries?: SkillEntry[];
+  config?: ClawdbotConfig;
+  workspaceDir: string;
+}): string {
+  const snapshotPrompt = params.skillsSnapshot?.prompt?.trim();
+  if (snapshotPrompt) return snapshotPrompt;
+  if (params.entries && params.entries.length > 0) {
+    const prompt = buildWorkspaceSkillsPrompt(params.workspaceDir, {
+      entries: params.entries,
+      config: params.config,
+    });
+    return prompt.trim() ? prompt : "";
+  }
+  return "";
+}
+
 export function loadWorkspaceSkillEntries(
   workspaceDir: string,
   opts?: {