# `SuperPi.MCP.Transport.Stdio`
[🔗](https://github.com/oleksandr/super-pi-beam/blob/v0.1.0/lib/super_pi/mcp/transport/stdio.ex#L1)

Stdio transport: the server runs as an OS process and speaks one JSON-RPC 2.0 object per line.

A server writes logs to stderr. The port does not capture stderr, so those logs go to
the stderr of the Super-Pi process, never into the JSON stream. A line that is not JSON
(a banner on stdout) is ignored.

# `start`

Options: `:command`, `:args`, `:env` (map), `:cwd`.
Returns `{:error, {:command_not_found, command}}` when the executable does not exist.

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