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

# Architecture

Understand how Armchain works under the hood. These pages cover the core protocol design, from how transactions are ordered using a DAG to how the EVM executes them.

> **Tip**: If you just want to start building, head to the [Quickstart](/get-started/quickstart.md). Come back here when you're curious about the internals.

| Document                                                        | Description                                                           |
| --------------------------------------------------------------- | --------------------------------------------------------------------- |
| [DAG](/architecture/dag.md)                                     | How Armchain uses a Directed Acyclic Graph instead of a linear chain  |
| [Consensus](/architecture/consensus.md)                         | How Lachesis aBFT achieves instant finality without leaders or rounds |
| [EVM](/architecture/evm.md)                                     | Ethereum Virtual Machine compatibility and execution details          |
| [Transaction Lifecycle](/architecture/transaction-lifecycle.md) | The complete journey of a transaction from submission to finality     |


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