feat: IMAP mail sync with thread-to-contact matching (PRD §6.1)

Real IMAP connection via imapflow library:
- Connects to IMAP server (IMAPFlow, TLS on port 993)
- Fetches recent messages (configurable limit, default 20)
- Extracts: from, fromEmail, subject, date, snippet (200 chars)
- Thread-to-contact matching (PRD §6.1):
  1. Match sender email against persons table
  2. If no person match, extract domain and match against company.website
  3. Returns matchedCompany + matchedPerson for each email
- Audit-logged (action: crm.mailsync:imap)
- Zod validated (host, port, user, password, folder, limit)
- 502 on IMAP connection failure with detail
- 400 on validation failure

Tested: invalid creds → 502 'IMAP connection failed', missing host → 400

skills/blog-writer/manage_examples.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+"""
+Utility script for managing the blog examples library.
+Helps identify old examples to prune when the library exceeds the limit.
+"""
+
+import os
+import sys
+from datetime import datetime
+from pathlib import Path
+
+EXAMPLES_DIR = Path(__file__).parent.parent / "references" / "blog-examples"
+MAX_EXAMPLES = 20
+PRUNE_COUNT = 5
+
+
+def list_examples():
+    """List all blog examples sorted by date (oldest first)."""
+    examples = []
+    for f in EXAMPLES_DIR.glob("*.md"):
+        # Extract date from filename (YYYY-MM-DD-slug.md)
+        try:
+            date_str = f.stem[:10]
+            date = datetime.strptime(date_str, "%Y-%m-%d")
+            examples.append((date, f.name))
+        except ValueError:
+            # Skip files that don't match the naming convention
+            continue
+    
+    return sorted(examples, key=lambda x: x[0])
+
+
+def check_library():
+    """Check library status and recommend pruning if needed."""
+    examples = list_examples()
+    count = len(examples)
+    
+    print(f"Blog Examples Library Status")
+    print(f"=" * 40)
+    print(f"Total examples: {count}")
+    print(f"Maximum allowed: {MAX_EXAMPLES}")
+    print()
+    
+    if count > MAX_EXAMPLES:
+        print(f"⚠️  Library exceeds limit by {count - MAX_EXAMPLES} files")
+        print(f"Recommend removing the {PRUNE_COUNT} oldest examples:")
+        print()
+        for i, (date, name) in enumerate(examples[:PRUNE_COUNT]):
+            print(f"  {i+1}. {name} ({date.strftime('%B %d, %Y')})")
+    else:
+        print(f"✓ Library is within limits ({MAX_EXAMPLES - count} slots available)")
+    
+    print()
+    print("All examples (oldest first):")
+    print("-" * 40)
+    for date, name in examples:
+        print(f"  {name}")
+
+
+def prune_oldest(dry_run=True):
+    """Remove the oldest examples to bring library under limit."""
+    examples = list_examples()
+    count = len(examples)
+    
+    if count <= MAX_EXAMPLES:
+        print("Library is within limits. No pruning needed.")
+        return
+    
+    to_remove = examples[:PRUNE_COUNT]
+    
+    if dry_run:
+        print(f"DRY RUN - Would remove {len(to_remove)} files:")
+    else:
+        print(f"Removing {len(to_remove)} oldest files:")
+    
+    for date, name in to_remove:
+        filepath = EXAMPLES_DIR / name
+        if dry_run:
+            print(f"  Would remove: {name}")
+        else:
+            filepath.unlink()
+            print(f"  Removed: {name}")
+
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1 and sys.argv[1] == "prune":
+        dry_run = "--execute" not in sys.argv
+        prune_oldest(dry_run=dry_run)
+    else:
+        check_library()