fix: Enforce min_chunk_size in RAG chunker

- Filter out chunks smaller than min_chunk_size (default 100 tokens)
- Exception: Keep all chunks if entire document is smaller than target size
- All 15 tests passing (100% pass rate)

Fixes edge case where very small chunks (e.g., 'Short.' = 6 chars) were
being created despite min_chunk_size=100 setting.

Test: pytest tests/test_rag_chunker.py -v

src/skill_seekers/sync/__init__.py

@@ -0,0 +1,40 @@
+"""
+Real-time documentation sync system.
+
+Monitors documentation websites for changes and automatically updates skills.
+
+Features:
+- Change detection (content hashing, last-modified headers)
+- Incremental updates (only fetch changed pages)
+- Webhook support (push-based notifications)
+- Scheduling (periodic checks with cron-like syntax)
+- Diff generation (see what changed)
+- Notifications (email, Slack, webhook)
+
+Usage:
+    # Create sync monitor
+    from skill_seekers.sync import SyncMonitor
+
+    monitor = SyncMonitor(
+        config_path="configs/react.json",
+        check_interval=3600  # 1 hour
+    )
+
+    # Start monitoring
+    monitor.start()
+
+    # Or run once
+    changes = monitor.check_for_updates()
+"""
+
+from .monitor import SyncMonitor
+from .detector import ChangeDetector
+from .models import SyncConfig, ChangeReport, PageChange
+
+__all__ = [
+    'SyncMonitor',
+    'ChangeDetector',
+    'SyncConfig',
+    'ChangeReport',
+    'PageChange',
+]