data update

docs/specialists/_index.md

@@ -308,3 +308,8 @@ Specialists are characters that slot into certain buildings and modify stats.
 - **Placement matters:** Area effects only apply to buildings within radius
 - **Stack rules:** Some specialists may have stacking limitations
 - **Building match:** Ensure specialist is compatible with target building
+
+## Related Documentation
+
+For comprehensive system-level information about specialists including acquisition sources, categories, effect types, and unlock conditions, see:
+- [Specialists System](/docs/systems/specialists.md)