diff --git a/tools/coherence/fix-frontmatter.py b/tools/coherence/fix-frontmatter.py
new file mode 100644
index 0000000..0d152e2
--- /dev/null
+++ b/tools/coherence/fix-frontmatter.py
@@ -0,0 +1,123 @@
+#!/usr/bin/env python3
+"""
+fix-frontmatter.py - Adds missing frontmatter to markdown files
+
+One thing: Add template frontmatter to files missing it.
+"""
+
+import sys
+import yaml
+from pathlib import Path
+from datetime import datetime
+
+FRONTMATTER_TEMPLATE = """---
+title: "{title}"
+date: {date}
+author: ""
+type: fieldnote
+status: published
+version: 1.0
+series: ""
+layer: ""
+tags: []
+notion_id: ""
+notion_created: ""
+source: Notion
+---"""
+
+def has_frontmatter(filepath):
+    """Check if file has YAML frontmatter."""
+    try:
+        with open(filepath, "r", encoding="utf-8") as f:
+            content = f.read()
+            if content.startswith("---"):
+                parts = content.split("---", 3)
+                if len(parts) >= 3:
+                    yaml.safe_load(parts[1])
+                    return True
+    except Exception:
+        pass
+    return False
+
+def extract_title_from_content(content):
+    """Try to extract title from first heading."""
+    lines = content.split("\n")
+    for line in lines:
+        line = line.strip()
+        if line.startswith("# "):
+            return line[2:].strip()
+    return "Untitled"
+
+def add_frontmatter(filepath):
+    """Add frontmatter to file."""
+    try:
+        with open(filepath, "r", encoding="utf-8") as f:
+            content = f.read()
+        
+        if has_frontmatter(filepath):
+            return False, "Already has frontmatter"
+        
+        # Extract title from content
+        title = extract_title_from_content(content)
+        date = datetime.now().strftime("%Y-%m-%d")
+        
+        # Build frontmatter
+        fm = FRONTMATTER_TEMPLATE.format(title=title, date=date)
+        
+        # Add frontmatter
+        new_content = fm + "\n\n" + content
+        
+        with open(filepath, "w", encoding="utf-8") as f:
+            f.write(new_content)
+        
+        return True, f"Added frontmatter with title: {title}"
+        
+    except Exception as e:
+        return False, f"Error: {e}"
+
+def main():
+    """Add frontmatter to markdown files."""
+    path_arg = sys.argv[1] if len(sys.argv) > 1 else "."
+    dry_run = "--dry-run" in sys.argv
+    
+    fixed = 0
+    skipped = 0
+    errors = 0
+    path = Path(path_arg)
+    
+    files = []
+    if path.is_file() and path.suffix == ".md":
+        files = [path]
+    elif path.is_dir():
+        files = list(path.rglob("*.md"))
+    else:
+        print(f"Error: {path_arg} is not a file or directory")
+        sys.exit(2)
+    
+    for filepath in files:
+        if not has_frontmatter(filepath):
+            if dry_run:
+                print(f"[DRY RUN] Would fix: {filepath}")
+                fixed += 1
+            else:
+                success, msg = add_frontmatter(filepath)
+                if success:
+                    print(f"Fixed: {filepath} - {msg}")
+                    fixed += 1
+                else:
+                    print(f"Skipped: {filepath} - {msg}")
+                    skipped += 1
+        else:
+            skipped += 1
+    
+    print(f"\nFixed: {fixed}")
+    print(f"Skipped: {skipped}")
+    print(f"Errors: {errors}")
+    
+    if dry_run:
+        print("\n(Dry run - no changes made)")
+    
+    sys.exit(0 if fixed > 0 else 0)
+
+if __name__ == "__main__":
+    main()