refactor(agent): dedupe harness and command workflows

src/agents/skills.resolveskillspromptforrun.e2e.test.ts

@@ -1,30 +1,6 @@
-import fs from "node:fs/promises";
-import path from "node:path";
 import { describe, expect, it } from "vitest";
 import { resolveSkillsPromptForRun } from "./skills.js";
 
-async function _writeSkill(params: {
-  dir: string;
-  name: string;
-  description: string;
-  metadata?: string;
-  body?: string;
-}) {
-  const { dir, name, description, metadata, body } = params;
-  await fs.mkdir(dir, { recursive: true });
-  await fs.writeFile(
-    path.join(dir, "SKILL.md"),
-    `---
-name: ${name}
-description: ${description}${metadata ? `\nmetadata: ${metadata}` : ""}
----
-
-${body ?? `# ${name}\n`}
-`,
-    "utf-8",
-  );
-}
-
 describe("resolveSkillsPromptForRun", () => {
   it("prefers snapshot prompt when available", () => {
     const prompt = resolveSkillsPromptForRun({