fix(dm): key .dmf element ids on the window name, not its node id

extract_dmf minted each element id from its window's node id, which
already embeds the file stem. The stem is absolute at extraction time and
extract()'s id remap only rewrites the leading copy, so the nested copy
kept the checkout path and the OS username inside every element id.

Use the window name instead. Element ids no longer depend on where the
repo is checked out.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B8gwEpjajiWHVW3c9smuKf

Author: rohit-jsfreaky

graphify/extractors/dm.py

@@ -449,6 +449,7 @@ def extract_dmf(path: Path) -> dict:
     seen: set[str] = {file_nid}
 
     current_window_nid: str | None = None
+    current_window_name: str | None = None
     current_elem_nid: str | None = None
     current_elem_name: str | None = None
 
@@ -465,13 +466,19 @@ def extract_dmf(path: Path) -> dict:
                               "confidence": "EXTRACTED", "source_file": str_path,
                               "source_location": f"L{line_idx}", "weight": 1.0})
             current_window_nid = nid
+            current_window_name = name
             current_elem_nid = None
             current_elem_name = None
             continue
         m = _DMF_ELEM_RE.match(line)
-        if m and current_window_nid is not None:
+        if m and current_window_nid is not None and current_window_name is not None:
             name = m.group(1)
-            nid = _make_id(stem, "elem", current_window_nid, name)
+            # Key on the window NAME, not its node id: the id already embeds
+            # `stem`, which is absolute at extraction time. extract()'s
+            # id-remap only rewrites the leading stem, so the copy nested in
+            # the middle kept the checkout path (and OS username) in every
+            # element id.
+            nid = _make_id(stem, "elem", current_window_name, name)
             if nid not in seen:
                 seen.add(nid)
                 nodes.append({"id": nid, "label": f'elem "{name}"', "file_type": "code",

tests/test_languages.py

@@ -3913,6 +3913,25 @@ def test_dmf_no_dangling_edges():
         assert e["source"] in node_ids
         assert e["target"] in node_ids
 
+def test_dmf_element_ids_do_not_depend_on_the_checkout_path(tmp_path):
+    """An element id was minted from its window's node id, which embeds the
+    absolute stem; extract()'s id-remap only rewrites the leading stem, so the
+    checkout path (and OS username) survived inside every element id."""
+    import shutil
+    from graphify.extract import extract
+
+    def ids_for(checkout):
+        (checkout / "ui").mkdir(parents=True)
+        shutil.copy(FIXTURES / "sample.dmf", checkout / "ui" / "skin.dmf")
+        r = extract([checkout / "ui" / "skin.dmf"], root=checkout, cache_root=checkout)
+        return {n["id"] for n in r["nodes"]}
+
+    first = ids_for(tmp_path / "clone_one")
+    second = ids_for(tmp_path / "elsewhere" / "clone_two")
+    assert any("elem" in i for i in first)
+    assert first == second
+    assert not [i for i in first if "clone_one" in i or "elsewhere" in i]
+
 
 # -- .NET project files (.sln, .csproj, .xaml, .razor) ------------------------