Struct JsonRpcNotification 

pub struct JsonRpcNotification {
    pub jsonrpc: String,
    pub method: String,
    pub params: Value,
}

JSON-RPC 2.0 notification envelope — server → client, no id field.

Used for MCP notifications/progress per the 2024-11-05 spec: https://spec.modelcontextprotocol.io/specification/2024-11-05/basic/utilities/progress/. A notification MUST NOT carry an id; that’s the serialization rule the peer uses to route it as a fire-and-forget message.

Fields

jsonrpc: String

method: String

params: Value

Implementations

impl JsonRpcNotification

pub fn progress(progress_token: Value, message: Value) -> Self

Construct a notifications/progress payload with the spec-mandated progressToken echoed back from the originating request’s params._meta.progressToken.

message is the opaque JSON payload emitted by the subprocess on one line of stdout. The MCP spec’s optional progress/total numeric fields are left absent for now — we forward the parsed JSON verbatim so higher-level clients can introspect whatever shape the CLI emits.

pub fn to_json_line(&self) -> Result<String, Error>

Serialize this notification as a single JSON line (no trailing newline). Suitable for writing to stdio with writeln!.

Errors

Returns a serde_json::Error if the payload cannot be serialized, which in practice only happens for non-finite floats that a well-formed subprocess would not produce.

Trait Implementations

impl Clone for JsonRpcNotification

fn clone(&self) -> JsonRpcNotification

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JsonRpcNotification

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for JsonRpcNotification

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for JsonRpcNotification

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

where __S: Serializer,

Serialize this value into the given Serde serializer.