refactor(agent): dedupe harness and command workflows

src/agents/skills-install.download-test-utils.ts

@@ -0,0 +1,50 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+
+export function setTempStateDir(workspaceDir: string): string {
+  const stateDir = path.join(workspaceDir, "state");
+  process.env.OPENCLAW_STATE_DIR = stateDir;
+  return stateDir;
+}
+
+export async function writeDownloadSkill(params: {
+  workspaceDir: string;
+  name: string;
+  installId: string;
+  url: string;
+  archive: "tar.gz" | "tar.bz2" | "zip";
+  stripComponents?: number;
+  targetDir: string;
+}): Promise<string> {
+  const skillDir = path.join(params.workspaceDir, "skills", params.name);
+  await fs.mkdir(skillDir, { recursive: true });
+  const meta = {
+    openclaw: {
+      install: [
+        {
+          id: params.installId,
+          kind: "download",
+          url: params.url,
+          archive: params.archive,
+          extract: true,
+          stripComponents: params.stripComponents,
+          targetDir: params.targetDir,
+        },
+      ],
+    },
+  };
+  await fs.writeFile(
+    path.join(skillDir, "SKILL.md"),
+    `---
+name: ${params.name}
+description: test skill
+metadata: ${JSON.stringify(meta)}
+---
+
+# ${params.name}
+`,
+    "utf-8",
+  );
+  await fs.writeFile(path.join(skillDir, "runner.js"), "export {};\n", "utf-8");
+  return skillDir;
+}