Struct SubprocessDef 

pub struct SubprocessDef {
    pub name: String,
    pub argv: Vec<String>,
    pub stdin: Option<String>,
    pub env: BTreeMap<String, String>,
    pub cwd: Option<String>,
    pub output: Option<SubprocessOutput>,
    pub stream_mode: Option<String>,
}

GH #83 — one declarative CLI invocation template: how a materialized worker payload (system prompt + task + model/tools/cwd) is rendered into a child-process invocation, and how its stdout is normalized back into the worker-result shape.

Deliberately a flat struct — no internal variant/kind discriminator. Adding support for a new CLI backend means adding one more named entry to Blueprint::subprocesses, never a new enum arm or spawner branch (the AgentKind closed enum already owns the kind axis; nesting a second “backend” hierarchy under it is the exact complexity this shape refuses).

argv / stdin / env values / cwd may contain {placeholder} tokens drawn from a closed, logic-free set ({system} / {system_file} / {prompt} / {model} / {tools_csv} / {work_dir} / {task_id} / {attempt}). Rendering is pure string substitution — no conditionals, no loops, no expression language; the engine-side consumer validates tokens against the closed set at compile time. This crate stores the templates as plain strings only (IN-immutability: no execution logic here).

Fields

name: String

Registry key, referenced by Runner::Subprocess { template }.

argv: Vec<String>

Program + arguments. argv[0] is the binary; every element may carry placeholder tokens.

stdin: Option<String>

Rendered and piped to the child’s stdin when Some; None = no stdin write (EOF immediately).

env: BTreeMap<String, String>

Extra environment variables (appended to the engine’s MSE_* token exports). Values may carry placeholder tokens. BTreeMap for a deterministic wire order.

cwd: Option<String>

Child working directory (may carry placeholder tokens). None = the spawn-time {work_dir} source decides (or the engine default when no source exists).

output: Option<SubprocessOutput>

stdout normalization declaration. None = the engine’s historical JSON-or-raw behavior, byte-for-byte.

stream_mode: Option<String>

Streaming wire protocol for stdout ("ndjson_lines" / "sse_events" / "length_prefixed" — same vocabulary as the spec-based Subprocess path). None = plain mode.

Trait Implementations

impl Clone for SubprocessDef

fn clone(&self) -> SubprocessDef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SubprocessDef

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SubprocessDef

fn deserialize<__D>( __deserializer: __D, ) -> Result<SubprocessDef, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for SubprocessDef

impl JsonSchema for SubprocessDef

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for SubprocessDef

fn eq(&self, other: &SubprocessDef) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for SubprocessDef

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SubprocessDef