# Advanced (/advanced)

> For the complete documentation index, see [llms.txt](/llms.txt)





Advanced capabilities for production smart account deployments.

<CardGrid cols="2">
  <DocCard num="01" title="Migration Guide" description="Upgrade from older SDK versions." href="/advanced/migration" />

  <DocCard num="02" title="Account Recovery" description="Recover accounts when users lose access." href="/advanced/account-recovery/sdk-recovery" />

  <DocCard num="03" title="Multisig" description="Multi-signer smart accounts." href="/advanced/multisig" />

  <DocCard num="04" title="UserOp Builder API" description="Build UserOps at the lowest level." href="/advanced/userop-builder-api" />
</CardGrid>