diff --git a/graphify/wiki.py b/graphify/wiki.py
index b08b22eb6..88c001e1f 100644
--- a/graphify/wiki.py
+++ b/graphify/wiki.py
@@ -30,6 +30,12 @@ _SLUG_SUFFIX_RESERVE = 5
 _UNSAFE_SLUG_CHARS = re.compile(r'[<>:"/\\|?*#%\x00-\x1f\x7f]')
 
 
+# The navigation footer links the catalog by its fixed filename rather than via
+# the label resolver, so an article whose own label is "index" resolves to its
+# own (deduplicated) file instead of the catalog.
+_INDEX_LINK = "[index](index.md)"
+
+
 def _safe_filename(name: str, limit: int = 200) -> str:
     """Make a label safe for use as a filename across platforms AND as a
     markdown link destination.
@@ -178,7 +184,7 @@ def _community_article(
         lines.append(f"- {conf}: {n} ({pct}%)")
     lines.append("")
 
-    lines += ["---", "", f"*Part of the graphify knowledge wiki. See {_md_link('index', resolver)} to navigate.*"]
+    lines += ["---", "", f"*Part of the graphify knowledge wiki. See {_INDEX_LINK} to navigate.*"]
     return "\n".join(lines)
 
 
@@ -224,7 +230,7 @@ def _god_node_article(G: nx.Graph, nid: str, labels: dict[int, str], node_commun
             )
         lines.append("")
 
-    lines += ["---", "", f"*Part of the graphify knowledge wiki. See {_md_link('index', resolver)} to navigate.*"]
+    lines += ["---", "", f"*Part of the graphify knowledge wiki. See {_INDEX_LINK} to navigate.*"]
     return "\n".join(lines)
 
 
@@ -338,7 +344,10 @@ def to_wiki(
     node_community: dict[str, int] = {n: cid for cid, nodes in communities.items() for n in nodes}
 
     count = 0
-    used_slugs: set[str] = set()
+    # "index" is reserved for the catalog written below: an article slugged
+    # "index" (a community named after an `index()` hub, an `Index` god node on a
+    # case-insensitive filesystem) would otherwise be overwritten by index.md.
+    used_slugs: set[str] = {"index"}
 
     # Articles are capped against THIS wiki directory, not just NAME_MAX: on
     # Windows a 200-char slug under an ordinary graphify-out/wiki/ overruns
@@ -368,7 +377,7 @@ def to_wiki(
     # _md_link renders them as plain text. Communities are slugged before god nodes
     # (and setdefault keeps the first), preserving the filename-assignment order
     # the case-collision dedup relies on.
-    resolver: dict[str, str] = {"index": "index"}
+    resolver: dict[str, str] = {}
 
     community_slugs: dict[int, str] = {}
     for cid in communities:
diff --git a/tests/test_wiki.py b/tests/test_wiki.py
index 130da843d..2e4d0f1a5 100644
--- a/tests/test_wiki.py
+++ b/tests/test_wiki.py
@@ -309,6 +309,33 @@ def test_to_wiki_god_node_label_case_collides_with_community(tmp_path):
     assert len(set(lowered)) == len(lowered), [p.name for p in articles]
 
 
+def test_to_wiki_article_labelled_index_does_not_overwrite_index_md(tmp_path):
+    """index.md is the wiki's reserved entry point. A community whose label slugs
+    to "index" (the default hub labeler names a community after its hub node, so a
+    hub `index()` view or an `Index` class does this) or a god node labelled
+    `index()` must get its own file, not be written to index.md and then
+    overwritten by the catalog - which also made its catalog link point back at
+    the index itself."""
+    G = nx.Graph()
+    G.add_node("n1", label="index()", file_type="code", source_file="views.py")
+    G.add_node("n2", label="render", file_type="code", source_file="views.py")
+    G.add_node("n3", label="Index", file_type="code", source_file="search.py")
+    G.add_node("n4", label="query", file_type="code", source_file="search.py")
+    G.add_edge("n1", "n2", relation="calls", confidence="EXTRACTED", weight=1.0)
+    G.add_edge("n3", "n4", relation="calls", confidence="EXTRACTED", weight=1.0)
+    communities = {0: ["n1", "n2"], 1: ["n3", "n4"]}
+    labels = {0: "index", 1: "Search"}
+    god_nodes = [{"id": "n3", "label": "Index", "degree": 1}]
+    n = to_wiki(G, communities, tmp_path, community_labels=labels, god_nodes_data=god_nodes)
+    articles = [p for p in tmp_path.glob("*.md") if p.stem.lower() != "index"]
+    # every article survives as its own file next to the catalog
+    assert len(articles) == n == 3, sorted(p.name for p in tmp_path.glob("*.md"))
+    index_text = (tmp_path / "index.md").read_text(encoding="utf-8")
+    assert index_text.startswith("# Knowledge Graph Index")
+    # no catalog entry links back to the catalog itself
+    assert "(index.md)" not in index_text, index_text
+
+
 # Regression tests for portable wiki links - Obsidian [[wikilinks]] break in
 # every non-Obsidian renderer (VS Code preview, GitHub, GitLab, plain browsers).