> For the complete documentation index, see [llms.txt](https://docs.on.nexus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.on.nexus/protocol-architecture.md).

# PROTOCOL ARCHITECTURE

- [System Overview](https://docs.on.nexus/protocol-architecture/system-overview.md): Structuring the definitive Sovereign Execution Backend for native Bitcoin yield.
- [Universal PSBT Engine](https://docs.on.nexus/protocol-architecture/psbt-engine.md): The cryptographic foundation for atomic execution and sovereign yield settlement.
- [L1 Settlement](https://docs.on.nexus/protocol-architecture/l1-settlement.md): Executing trades and finalizing market-making yield directly on Bitcoin L1 without custodial risk.
- [Privacy & MEV Resistance](https://docs.on.nexus/protocol-architecture/mev-resistance.md): Decoupling execution intent from settlement to eradicate MEV and protect institutional capital.