# Summary

- [Introduction](introduction.md)
- [Runtime Entry](runtime_entry.md)
- [Placement and Stealing](placement.md)
- [Scheduler Tuning](scheduler_tuning.md)
- [I/O Surface](io_surface.md)
- [Companion Protocols](companion_protocols.md)
- [Native Extensions](native_extensions.md)
- [Benchmarking and Guardrails](benchmarking.md)
- [Migration Notes](migration.md)
- [Companion Stability](companion_stability.md)
