Struct StdioSpawnSpec 

pub struct StdioSpawnSpec {
    pub command: String,
    pub args: Vec<String>,
    pub working_dir: Option<String>,
    pub env: BTreeMap<String, String>,
    pub timeout_secs: Option<u64>,
    pub persistent: bool,
}

Spawn specification for stdio MCP subprocesses. Required when transport_mode == ToolTransportMode::McpStdio.

Fields

command: String

Executable command. Looked up via $PATH on the operator’s node. E.g. npx, python, /usr/local/bin/stripe-mcp.

args: Vec<String>

Arguments passed to the command. E.g. ["-y", "@stripe/mcp", "--tools=all"] for the Stripe MCP via npx.

working_dir: Option<String>

Working directory for the subprocess. None = node’s cwd.

env: BTreeMap<String, String>

Environment variables (key → value). The UpstreamAuth::EnvVar variant injects the operator’s sealed credential as an additional env var at spawn time — it is NOT stored here. Use this map for non-secret config like LOG_LEVEL, REGION, STRIPE_TEST_MODE, etc.

timeout_secs: Option<u64>

Per-call timeout in seconds. Default 30s if None.

persistent: bool

Whether to keep the subprocess alive between invocations (persistent mode) or spawn-per-call (ephemeral mode). Most MCPs support persistent mode and respond faster that way; some legacy MCPs require per-call spawn. Default: persistent.

Trait Implementations

impl Clone for StdioSpawnSpec

fn clone(&self) -> StdioSpawnSpec

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StdioSpawnSpec

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StdioSpawnSpec

fn default() -> StdioSpawnSpec

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for StdioSpawnSpec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StdioSpawnSpec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.