# `ExMCP.Client.DefaultHandler`
[🔗](https://github.com/azmaveth/ex_mcp/blob/v1.0.0/lib/ex_mcp/client/default_handler.ex#L1)

This module provides ExMCP extensions beyond the standard MCP specification.

Default implementation of the ExMCP.Client.Handler behaviour.

This handler provides a basic implementation that can be extended or replaced
by applications. It includes support for human-in-the-loop approval through
the ExMCP.Approval behaviour.

## Options

- `:approval_handler` - Module implementing ExMCP.Approval behaviour (required for createMessage)
- `:roots` - List of root directories to expose (default: current directory)
- `:model_selector` - Function to select which model to use for sampling

## Example

    # Start a client with the default handler
    {:ok, client} = ExMCP.Client.start_link(
      transport: {:stdio, "my-server"},
      handler: {ExMCP.Client.DefaultHandler, [
        approval_handler: MyApprovalHandler,
        roots: [%{uri: "file:///home/user", name: "Home"}]
      ]}
    )

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*Consult [api-reference.md](api-reference.md) for complete listing*