diff --git a/app/core/edges.py b/app/core/edges.py
new file mode 100644
index 0000000..0cc0544
--- /dev/null
+++ b/app/core/edges.py
@@ -0,0 +1,45 @@
+from __future__ import annotations
+from typing import List, Dict
+
+def deriv_edges_for_note(note_meta: Dict, chunk_payloads: List[Dict]) -> List[Dict]:
+    edges: List[Dict] = []
+
+    # Chunk → Note (belongs_to) + prev/next
+    for idx, ch in enumerate(chunk_payloads):
+        edges.append({
+            "src_id": ch["id"], "dst_id": note_meta["id"],
+            "edge_type": "belongs_to", "scope": "chunk"
+        })
+        prev_id = ch.get("neighbors",{}).get("prev")
+        next_id = ch.get("neighbors",{}).get("next")
+        if prev_id:
+            edges.append({"src_id": ch["id"], "dst_id": prev_id, "edge_type": "next", "scope": "chunk"})
+            edges.append({"src_id": prev_id, "dst_id": ch["id"], "edge_type": "prev", "scope": "chunk"})
+        if next_id:
+            edges.append({"src_id": ch["id"], "dst_id": next_id, "edge_type": "next", "scope": "chunk"})
+            edges.append({"src_id": next_id, "dst_id": ch["id"], "edge_type": "prev", "scope": "chunk"})
+
+        # references aus wikilinks (Chunk-Scope)
+        for ref in ch.get("references", []):
+            tid = ref.get("target_id")
+            if not tid: continue
+            edges.append({"src_id": ch["id"], "dst_id": tid, "edge_type": "references", "scope": "chunk"})
+            edges.append({"src_id": tid, "dst_id": ch["id"], "edge_type": "backlink", "scope": "chunk"})
+
+    # depends_on / assigned_to (Note-Scope, aus Frontmatter)
+    for dep in note_meta.get("depends_on", []) or []:
+        edges.append({"src_id": note_meta["id"], "dst_id": dep, "edge_type": "depends_on", "scope": "note"})
+    for ass in note_meta.get("assigned_to", []) or []:
+        edges.append({"src_id": note_meta["id"], "dst_id": ass, "edge_type": "assigned_to", "scope": "note"})
+
+    # Note-Level references (optional: falls du im Note-Payload `references` sammelst)
+    for tid in note_meta.get("references", []) or []:
+        edges.append({"src_id": note_meta["id"], "dst_id": tid, "edge_type": "references", "scope": "note"})
+        edges.append({"src_id": tid, "dst_id": note_meta["id"], "edge_type": "backlink", "scope": "note"})
+
+    # Dedupe
+    uniq = {}
+    for e in edges:
+        k = (e["src_id"], e["edge_type"], e["dst_id"], e.get("scope","note"))
+        uniq[k] = e
+    return list(uniq.values())