diff --git a/scripts/ingest.sh b/scripts/ingest.sh
index 46b2060d..fd898b4e 100755
--- a/scripts/ingest.sh
+++ b/scripts/ingest.sh
@@ -20,7 +20,7 @@ for arg in "$@"; do
       echo "Ingest a document into Vektra."
       echo ""
       echo "Arguments:"
-      echo "  FILE        Path to the document (PDF, DOCX, PPTX)"
+      echo "  FILE        Path to the document (PDF, DOCX, PPTX, MD)"
       echo "  NAMESPACE   Target namespace (default: 'default')"
       echo ""
       echo "Environment:"
@@ -62,7 +62,7 @@ case "${FILENAME##*.}" in
   pdf)  CONTENT_TYPE="application/pdf" ;;
   docx) CONTENT_TYPE="application/vnd.openxmlformats-officedocument.wordprocessingml.document" ;;
   pptx) CONTENT_TYPE="application/vnd.openxmlformats-officedocument.presentationml.presentation" ;;
-  md)   CONTENT_TYPE="text/markdown" ;;
+  md|markdown) CONTENT_TYPE="text/markdown" ;;
   *)    CONTENT_TYPE="application/octet-stream" ;;
 esac
 
diff --git a/vektra-core/src/vektra_core/safeguards/__init__.py b/vektra-core/src/vektra_core/safeguards/__init__.py
index 8ea802a2..01eaa747 100644
--- a/vektra-core/src/vektra_core/safeguards/__init__.py
+++ b/vektra-core/src/vektra_core/safeguards/__init__.py
@@ -24,7 +24,9 @@ def create_safeguard(mode: str, *, pii_chunk_threshold: int = 3) -> SafeguardHoo
     Returns:
         A SafeguardHook implementation.
     """
-    if mode == "presidio":
+    normalized = mode.strip().lower()
+
+    if normalized == "presidio":
         try:
             from vektra_core.safeguards.presidio import PresidioPIISafeguard
 
@@ -37,7 +39,7 @@ def create_safeguard(mode: str, *, pii_chunk_threshold: int = 3) -> SafeguardHoo
             )
             return PassthroughSafeguard()
 
-    if mode != "passthrough":
+    if normalized != "passthrough":
         log.warning("safeguard_unknown_mode", mode=mode, fallback="passthrough")
 
     return PassthroughSafeguard()
diff --git a/vektra-learn/src/vektra_learn/service.py b/vektra-learn/src/vektra_learn/service.py
index fed4af37..cf872643 100644
--- a/vektra-learn/src/vektra_learn/service.py
+++ b/vektra-learn/src/vektra_learn/service.py
@@ -52,6 +52,7 @@ class TokenRequest(BaseModel):
     course_id: str = Field(min_length=1, max_length=255)
     namespace: str | None = Field(
         default=None,
+        min_length=1,
         max_length=64,
         description="Override namespace in JWT. When omitted, course_id is used as namespace convention.",
     )