Skip embedding validation on document deletion

CHANGELOG.md

@@ -5,6 +5,10 @@
 
 - `hotpotqa` evaluation dataset.
 
+### Fixed
+
+- Document deletion no longer raises `ConfigMismatchError` on embedding config drift.
+
 ## [0.67.0] - 2026-07-16
 
 ### Added

haiku_rag_slim/haiku/rag/app.py

@@ -492,6 +492,7 @@ class HaikuRAGApp:  # pragma: no cover
             db_path=self.db_path,
             config=self.config,
             read_only=self.read_only,
+            skip_validation=True,
         ) as self.client:
             deleted = await self.client.delete_document(doc_id)
             if deleted:

haiku_rag_slim/haiku/rag/mcp.py

@@ -82,7 +82,9 @@ def create_mcp_server(
         async def delete_document(document_id: str) -> bool:
             """Delete a document by its ID."""
             try:
-                async with HaikuRAG(db_path, config=config) as rag:
+                async with HaikuRAG(
+                    db_path, config=config, skip_validation=True
+                ) as rag:
                     return await rag.delete_document(document_id)
             except Exception:
                 return False

tests/test_cascade_delete.py

@@ -1,5 +1,7 @@
+from haiku.rag.app import HaikuRAGApp
 from haiku.rag.client import HaikuRAG
 from haiku.rag.client.documents import parent_uri_filter
+from haiku.rag.config.models import AppConfig
 from haiku.rag.store.models.document import Document
 
 
@@ -126,6 +128,25 @@ async def test_delete_handles_self_referential_parent(temp_db_path):
         assert await client.get_document_by_id(doc.id) is None
 
 
+async def test_delete_succeeds_with_embedding_dim_mismatch(temp_db_path):
+    """Deletion touches no embeddings, so a vector_dim mismatch must not block it."""
+    async with HaikuRAG(temp_db_path, create=True) as client:
+        doc = await client.document_repository.create(
+            Document(content="body", uri="file:///doc.pdf", metadata={})
+        )
+
+    mismatched = AppConfig()
+    mismatched.embeddings.model.vector_dim = 9999
+
+    app = HaikuRAGApp(db_path=temp_db_path, config=mismatched)
+    await app.delete_document(doc.id)
+
+    async with HaikuRAG(
+        temp_db_path, config=mismatched, skip_validation=True
+    ) as client:
+        assert await client.get_document_by_id(doc.id) is None
+
+
 def test_processing_config_extract_pdf_attachments_default_true():
     from haiku.rag.config.models import ProcessingConfig