Add Skill OS 2.0 foundations

tests/verify_github_benchmark_scan.py

@@ -48,6 +48,43 @@ def main() -> None:
     assert "anthropics/skills" in markdown, markdown[:800]
     assert "Cross-Repo Borrow Recommendations" in markdown, markdown[:1400]
 
+    empty_fixture = tmp_root / "empty_fixture"
+    empty_fixture.mkdir(parents=True, exist_ok=True)
+    (empty_fixture / "bundle.json").write_text(
+        json.dumps({"search_items": [], "readmes": {}}, ensure_ascii=False, indent=2) + "\n",
+        encoding="utf-8",
+    )
+    empty_skill_dir = tmp_root / "benchmark-empty-demo"
+    (empty_skill_dir / "reports").mkdir(parents=True, exist_ok=True)
+    (empty_skill_dir / "SKILL.md").write_text(
+        "---\nname: benchmark-empty-demo\ndescription: Turn a vague idea into a reusable skill.\n---\n\n# Empty Benchmark Demo\n",
+        encoding="utf-8",
+    )
+    empty_proc = subprocess.run(
+        [
+            sys.executable,
+            str(SCRIPT),
+            str(empty_skill_dir),
+            "--query",
+            "unlikely benchmark query",
+            "--fixture-dir",
+            str(empty_fixture),
+        ],
+        cwd=ROOT,
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    empty_payload = json.loads(empty_proc.stdout)
+    assert empty_payload["ok"], empty_payload
+    assert empty_payload["repositories"] == [], empty_payload
+    assert empty_payload["cross_repo"]["borrow"] == [], empty_payload
+    assert empty_payload["external_references"] == [], empty_payload
+    assert empty_payload["borrow_prompt"].startswith("No benchmark suggestions"), empty_payload
+    empty_markdown = Path(empty_payload["artifacts"]["markdown"]).read_text(encoding="utf-8")
+    assert "No benchmark repositories were collected." in empty_markdown, empty_markdown[:600]
+    assert "Review the three benchmark objects" not in empty_markdown, empty_markdown[:600]
+
     print(json.dumps({"ok": True}, ensure_ascii=False, indent=2))