add tests for canvas vault-relative paths and hook .exe skip

tests/test_export.py

@@ -3,7 +3,7 @@ import tempfile
 from pathlib import Path
 from graphify.build import build_from_json
 from graphify.cluster import cluster
-from graphify.export import to_json, to_cypher, to_graphml, to_html
+from graphify.export import to_json, to_cypher, to_graphml, to_html, to_canvas
 
 FIXTURES = Path(__file__).parent / "fixtures"
 
@@ -125,3 +125,18 @@ def test_to_html_contains_nodes_and_edges():
         content = out.read_text()
         assert "RAW_NODES" in content
         assert "RAW_EDGES" in content
+
+
+def test_to_canvas_file_paths_relative_to_vault():
+    """Node file paths in canvas must be vault-root-relative (just fname.md), not hardcoded."""
+    G = make_graph()
+    communities = cluster(G)
+    with tempfile.TemporaryDirectory() as tmp:
+        out = Path(tmp) / "graph.canvas"
+        to_canvas(G, communities, str(out))
+        data = json.loads(out.read_text())
+        file_nodes = [n for n in data["nodes"] if n.get("type") == "file"]
+        assert file_nodes, "canvas should contain file nodes"
+        for node in file_nodes:
+            assert "/" not in node["file"], f"file path should not contain '/': {node['file']}"
+            assert node["file"].endswith(".md")

tests/test_hooks.py

@@ -117,3 +117,9 @@ def test_status_shows_both_hooks(tmp_path):
     assert "post-commit" in result
     assert "post-checkout" in result
     assert result.count("installed") >= 2
+
+
+def test_hook_skips_head_on_exe():
+    """Hook script must skip shebang extraction for .exe binaries (Windows)."""
+    from graphify.hooks import _PYTHON_DETECT
+    assert "*.exe) _SHEBANG=" in _PYTHON_DETECT or '*.exe)' in _PYTHON_DETECT