diff --git a/app/core/ingestion/ingestion_processor.py b/app/core/ingestion/ingestion_processor.py
index d3c40f4..9cd2d78 100644
--- a/app/core/ingestion/ingestion_processor.py
+++ b/app/core/ingestion/ingestion_processor.py
@@ -248,12 +248,16 @@ class IngestionService:
             if ".trash" in file_path or any(part.startswith('.') for part in file_path.split(os.sep)):
                 return {**result, "status": "skipped", "reason": "ignored_folder"}
 
-            parsed = read_markdown(file_path)
+            # WP-24c v4.5.9: Path-Normalization für konsistente Hash-Prüfung
+            # Normalisiere file_path zu absolutem Pfad für konsistente Verarbeitung
+            normalized_file_path = os.path.abspath(file_path) if not os.path.isabs(file_path) else file_path
+            
+            parsed = read_markdown(normalized_file_path)
             if not parsed: return {**result, "error": "Empty file"}
             fm = normalize_frontmatter(parsed.frontmatter)
             validate_required_frontmatter(fm)
             
-            note_pl = make_note_payload(parsed, vault_root=vault_root, file_path=file_path, types_cfg=self.registry)
+            note_pl = make_note_payload(parsed, vault_root=vault_root, file_path=normalized_file_path, types_cfg=self.registry)
             note_id = note_pl.get("note_id")
 
             if not note_id:
@@ -261,22 +265,36 @@ class IngestionService:
 
             logger.info(f"📄 Bearbeite: '{note_id}'")
 
-            # Change Detection (WP-24c v4.2.4: Hash-basierte Inhaltsprüfung)
+            # WP-24c v4.5.9: Strikte Change Detection (Hash-basierte Inhaltsprüfung)
+            # Prüft Hash VOR der Verarbeitung, um redundante Ingestion zu vermeiden
             old_payload = None if force_replace else fetch_note_payload(self.client, self.prefix, note_id)
             c_miss, e_miss = artifacts_missing(self.client, self.prefix, note_id)
             
             content_changed = True
+            hash_match = False
             if old_payload and not force_replace:
                 # Nutzt die über MINDNET_CHANGE_DETECTION_MODE gesteuerte Genauigkeit
                 # Mapping: 'full' -> 'full:parsed:canonical', 'body' -> 'body:parsed:canonical'
                 h_key = f"{self.active_hash_mode or 'full'}:parsed:canonical"
                 new_h = note_pl.get("hashes", {}).get(h_key)
                 old_h = old_payload.get("hashes", {}).get(h_key)
-                if new_h and old_h and new_h == old_h:
-                    content_changed = False
+                
+                if new_h and old_h:
+                    hash_match = (new_h == old_h)
+                    if hash_match:
+                        content_changed = False
+                        logger.debug(f"🔍 [CHANGE-DETECTION] Hash identisch für '{note_id}': {h_key} = {new_h[:16]}...")
+                    else:
+                        logger.debug(f"🔍 [CHANGE-DETECTION] Hash geändert für '{note_id}': alt={old_h[:16]}..., neu={new_h[:16]}...")
+                else:
+                    # WP-24c v4.5.9: Wenn Hash fehlt, als geändert behandeln (Sicherheit)
+                    logger.debug(f"🔍 [CHANGE-DETECTION] Hash fehlt für '{note_id}': new_h={bool(new_h)}, old_h={bool(old_h)}")
 
-            if not (force_replace or content_changed or not old_payload or c_miss or e_miss):
-                return {**result, "status": "unchanged", "note_id": note_id}
+            # WP-24c v4.5.9: Strikte Logik - überspringe komplett wenn Hash identisch UND keine Artefakte fehlen
+            # Dies verhindert redundante Embedding-Generierung und Chunk-Verarbeitung
+            if not force_replace and hash_match and old_payload and not c_miss and not e_miss:
+                logger.info(f"⏭️ [SKIP] '{note_id}' unverändert (Hash identisch, alle Artefakte vorhanden)")
+                return {**result, "status": "unchanged", "note_id": note_id, "reason": "hash_identical"}
 
             if not apply: 
                 return {**result, "status": "dry-run", "changed": True, "note_id": note_id}