Struct SessionExecutionArgs 

pub struct SessionExecutionArgs {

    pub agent: Arc<Agent>,
    pub session_id: String,
    pub session: Session,
    pub tools_override: Option<Arc<dyn ToolExecutor>>,
    pub provider_override: Option<Arc<dyn LLMProvider>>,
    pub model_roster: ModelRoster,
    pub reasoning_effort: Option<ReasoningEffort>,
    pub reasoning_effort_source: String,
    pub auxiliary_model_resolver: Option<Arc<dyn Fn() -> AuxiliaryModelConfig + Send + Sync>>,
    pub disabled_tools: Option<BTreeSet<String>>,
    pub disabled_skill_ids: Option<BTreeSet<String>>,
    pub selected_skill_ids: Option<Vec<String>>,
    pub selected_skill_mode: Option<String>,
    pub cancel_token: CancellationToken,
    pub mpsc_tx: Sender<AgentEvent>,
    pub image_fallback: Option<ImageFallbackConfig>,
    pub gold_config: Option<GoldConfig>,
    pub guardian_config: Option<GuardianConfig>,
    pub guardian_spawner: Option<Arc<dyn GuardianSpawner>>,
    pub bash_resume_hook: Option<Arc<dyn BashResumeHook>>,
    pub app_data_dir: Option<PathBuf>,
    pub runners: Arc<RwLock<HashMap<String, AgentRunner>>>,
    pub sessions_cache: SessionCache,
    pub on_complete: Option<SessionCompletionHook>,
}

Arguments for spawning a background agent execution.

This is the crate-agnostic equivalent of the server’s SpawnAgentExecution. It holds everything needed to run the agent loop and persist the result, without depending on HTTP types or AppState.

Fields

agent: Arc<Agent>

session_id: String

session: Session

tools_override: Option<Arc<dyn ToolExecutor>>

provider_override: Option<Arc<dyn LLMProvider>>

model_roster: ModelRoster

Cohesive primary + auxiliary model/provider selection. The primary model is required for a spawn (see ModelRoster::model); the three auxiliary roles default to their Config::get_* fallbacks when None.

reasoning_effort: Option<ReasoningEffort>

reasoning_effort_source: String

auxiliary_model_resolver: Option<Arc<dyn Fn() -> AuxiliaryModelConfig + Send + Sync>>

disabled_tools: Option<BTreeSet<String>>

disabled_skill_ids: Option<BTreeSet<String>>

selected_skill_ids: Option<Vec<String>>

selected_skill_mode: Option<String>

cancel_token: CancellationToken

mpsc_tx: Sender<AgentEvent>

image_fallback: Option<ImageFallbackConfig>

gold_config: Option<GoldConfig>

guardian_config: Option<GuardianConfig>

Optional guardian adversarial-review gate configuration.

guardian_spawner: Option<Arc<dyn GuardianSpawner>>

Late-bound guardian reviewer spawner (server-provided; the runner cannot construct a child directly).

bash_resume_hook: Option<Arc<dyn BashResumeHook>>

Late-bound bash self-resume hook (issue #84 Phase 2b).

app_data_dir: Option<PathBuf>

runners: Arc<RwLock<HashMap<String, AgentRunner>>>

sessions_cache: SessionCache

on_complete: Option<SessionCompletionHook>

Optional bespoke finalization, run after the runner is finalized and before the session is persisted. See SessionCompletionHook.