Fix catchup prompt loading all entries into memory

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Catchup prompt now pushes `since` filter to SQL instead of loading all entries into Python
+
 ### Added
 - **Branding assets**: 9 SVG logo variants (icon sizes 16–200px, light/dark, wordmark light/dark) and favicon.ico in `docs/branding/`
 - **README logo header**: Wordmark hero replaces plain `# mcp-awareness` heading, centered badge row

src/mcp_awareness/server.py

@@ -1519,12 +1519,8 @@ async def write_guide() -> str:
 async def catchup(hours: int = 24) -> str:
     """Compose a catchup summary of recently updated entries."""
     since = now_utc() - timedelta(hours=hours)
-    # Pull all knowledge and filter by updated timestamp
-    all_entries = store.get_knowledge(include_history="true")
-    recent = [e for e in all_entries if e.updated >= since]
-    # Also check alerts
-    alerts = store.get_active_alerts()
-    recent_alerts = [a for a in alerts if a.updated >= since]
+    recent = store.get_knowledge(include_history="true", since=since)
+    recent_alerts = store.get_active_alerts(since=since)
 
     parts: list[str] = [f"# Catchup — last {hours} hours"]