# Systems

System documentation covers cross-cutting server features that span multiple
modules, message handlers, scripts, database state, or external integration
points.

- [Client 15.25 compatibility update](client-15-25-compatibility-update.md)
- [Livestream](livestream/README.md)
- [Lua API documentation generator](lua-api-docgen.md)
- [Lua shared userdata ownership](lua-shared-userdata.md)
- [Multiprotocol runtime profiles](multiprotocol.md)
- [Performance and lifetime roadmap](performance-lifetime/README.md)
- [Parallel monster AI and dispatcher fairness roadmap](performance-lifetime/parallel-monster-ai-roadmap.md)
