> ## Documentation Index
> Fetch the complete documentation index at: https://docs.reiy.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Concepts

> Core ideas behind Reiy Protocol.

# Concepts

Concepts explain what Reiy is and how the protocol works without requiring API schemas or implementation details first.

<CardGroup cols={2}>
  <Card title="Intents" href="/reiy-protocol/concepts/introduction/intents">
    How users express protected trading outcomes.
  </Card>

  <Card title="Solvers" href="/reiy-protocol/concepts/introduction/solvers">
    The execution providers that compete to fill intents and settle on-chain.
  </Card>

  <Card title="Fisherman" href="/reiy-protocol/concepts/introduction/fisherman">
    The off-chain coordinator that runs competition and signs certificates.
  </Card>

  <Card title="Flow of an intent" href="/reiy-protocol/concepts/how-it-works/flow-of-an-intent">
    Follow an intent from submission to settlement.
  </Card>

  <Card title="Epoch and auction lifecycle" href="/reiy-protocol/concepts/how-it-works/epoch-lifecycle">
    Understand contract epochs and Fisherman auction-round statuses.
  </Card>

  <Card title="Auction rounds and certificates" href="/reiy-protocol/concepts/how-it-works/auction-rounds-and-certificates">
    Learn how Fisherman groups intents, ranks solver solutions, and signs settlement certificates.
  </Card>

  <Card title="Protections" href="/reiy-protocol/concepts/protections">
    SBBO, protected minimums, custody, epoch safety, and certificate checks.
  </Card>

  <Card title="Fees" href="/reiy-protocol/concepts/fees">
    A user-facing explanation of protocol fees.
  </Card>
</CardGroup>


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