# 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.
- [Fast Execution Accounts](https://docs.on.nexus/protocol-architecture/fast-execution-accounts.md): Deep liquidity state channels enabling high-frequency, non-custodial swaps and continuous sovereign yield.
- [Privacy & MEV Resistance](https://docs.on.nexus/protocol-architecture/mev-resistance.md): Decoupling execution intent from settlement to eradicate MEV and protect institutional capital.


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