Complete WP-0006 through WP-0009: registry expansion, catalog, graph, tests

Register six new capabilities (12 total), add searchable catalog UI and graph
explorer, introduce pytest suite with CI fail-on-warnings, and close gap
analysis priorities 13 and 16. WP-0010 remains backlog for network federation.

tests/test_registry.py

@@ -0,0 +1,58 @@
+from __future__ import annotations
+
+import subprocess
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+
+
+def run_cli(*args: str) -> subprocess.CompletedProcess[str]:
+    return subprocess.run(
+        [sys.executable, "-m", "reuse_surface.cli", *args],
+        cwd=ROOT,
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+
+def test_validate_passes():
+    result = run_cli("validate")
+    assert result.returncode == 0
+    assert "ok: validated" in result.stdout
+
+
+def test_validate_relations_clean():
+    result = run_cli("validate", "--relations", "--fail-on-warnings")
+    assert result.returncode == 0, result.stderr
+
+
+def test_query_finds_registry():
+    result = run_cli("query", "--tag", "registry")
+    assert result.returncode == 0
+    assert "capability.registry.register" in result.stdout
+
+
+def test_federation_compose():
+    result = run_cli("federation", "compose")
+    assert result.returncode == 0
+    assert (ROOT / "registry/indexes/federated.yaml").exists()
+
+
+def test_export_json():
+    result = run_cli("export", "--format", "json")
+    assert result.returncode == 0
+    assert '"capabilities"' in result.stdout
+
+
+def test_graph_check_clean():
+    result = run_cli("graph", "--check", "--fail-on-warnings")
+    assert result.returncode == 0, result.stderr
+
+
+def test_catalog_writes_search():
+    result = run_cli("catalog")
+    assert result.returncode == 0
+    assert (ROOT / "docs/catalog/registry.json").exists()
+    assert (ROOT / "docs/catalog/search.html").exists()