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

# Chain Operator Configurations

> Learn how to configure an OP Stack chain.

OP Stack chains can be configured for the Chain Operator's needs.
Each component of the stack has its own considerations.
See the following for documentation for details on configuring each piece.

<Steps>
  <Step title="Rollup Configuration">
    Deploying your OP Stack contracts requires creating a deployment configuration
    JSON file. This defines the behavior of your network at its genesis.

    * **Important Notes:**
      * The Rollup Configuration sets parameters for the L1 smart contracts upon deployment. These parameters govern the behavior of your chain and are critical to its operation.
      * Be aware that many of these values cannot be changed after deployment or require a complex process to update.
        Carefully consider and validate all settings during configuration to avoid issues later.

    * [Rollup Configuration Documentation](/chain-operators/guides/configuration/rollup)
  </Step>

  <Step title="Batcher Configuration">
    The batcher is the service that submits the L2 Sequencer data to L1, to make
    it available for verifiers. These configurations determine the batcher's
    behavior.

    * [Batcher Configuration Documentation](/chain-operators/guides/configuration/batcher)
  </Step>

  <Step title="Proposer Configuration">
    The proposer is the service that submits the output roots to the L1. These
    configurations determine the proposer's behavior.

    * [Proposer Configuration Documentation](/chain-operators/guides/configuration/proposer)
  </Step>

  <Step title="Node Configuration">
    The rollup node has a wide array of configurations for both the consensus and
    execution clients.

    * [Consensus Client Configuration](/node-operators/guides/configuration/consensus-clients)
    * [Execution Client Configuration](/node-operators/guides/configuration/execution-clients)
  </Step>
</Steps>