Enum Runner 

pub enum Runner {
    WsOperator {
        variant: String,
        tools: Vec<String>,
    },
    WsClaudeCode {
        variant: String,
        tools: Vec<String>,
    },
    AgentBlockInProcess {
        tools: Vec<String>,
    },
    Subprocess {
        template: String,
        overrides: SubprocessOverrides,
    },
}

The execution shell an agent’s Worker IMPL runs inside — holding tool grant, model selection, and runtime capabilities. Tier 1 of the GH #46 3-tier Worker model (Runner / Agent / Context).

Runner here is broader than the ADK / OpenAI Agents SDK Runner (a loop driver): it is the execution shell holding tool grant, model selection, and runtime capabilities. Loop driving itself is the backend’s job (Claude Code harness / AgentBlock runtime).

Resolved per-agent by resolve_runner’s 5-step cascade; wiring the resolved value into the launch path is Milestone 3 — this Milestone only declares the shape and the pure resolver.

Variants

WsOperator

Platform-neutral WebSocket Operator backend. The joined execution environment may be Claude Code, Codex, or another MainAI/plugin that implements the common binding and spawn contracts.

Fields

variant: String

Provider-defined launch variant selected by the execution environment.

tools: Vec<String>

Minimum tool grant the provider must enforce.

WsClaudeCode

WS backend: Claude Code subagent wrapper. variant is the wrapper’s subagent_type; tools mirrors the wrapper frontmatter = enforced grant.

Kept as a compatibility backend for existing Blueprints. New platform-neutral declarations should use Self::WsOperator.

Fields

variant: String

The wrapper’s subagent_type (= WorkerBinding.variant in the mlua-swarm core crate).

tools: Vec<String>

Declared (informational) tool list — mirrors the wrapper frontmatter; the actual grant is enforced by the wrapper file itself, not by this list.

AgentBlockInProcess

In-process backend: agent-block runtime. tools is the effective (enforced) tool set for the in-process registry.

Fields

tools: Vec<String>

Effective (enforced) tool set passed to the agent-block runtime’s registry — unlike WebSocket Runner tool requests, this list is not merely informational.

Subprocess

GH #83 — Subprocess EmbedAgent backend: the step runs headless through the ProcessSpawner path, with the invocation described by a SubprocessDef template looked up by name in Blueprint::subprocesses. Name symmetry with AgentKind::Subprocess is deliberate (1:1 — this variant is the Runner-axis face of the same Worker IMPL kind).

Per-agent overrides live HERE (not on SubprocessDef) so the template struct stays flat and shareable across agents.

Fields

template: String

SubprocessDef::name reference into Blueprint::subprocesses.

overrides: SubprocessOverrides

Per-agent overrides applied on top of the referenced template and the agent profile. Empty (all defaults) is omitted on the wire.

Trait Implementations

impl Clone for Runner

fn clone(&self) -> Runner

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Runner

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Runner

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Runner

impl JsonSchema for Runner

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 Runner

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Runner

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Runner