Struct FleetExecConfig 

pub struct FleetExecConfig {
    pub allowed_tools: Vec<String>,
    pub disallowed_tools: Vec<String>,
    pub max_turns: u32,
    pub max_spawn_depth: u32,
    pub append_system_prompt: String,
    pub output_format: String,
}

Headless worker execution constraints (#3027).

These limits apply to all fleet workers and sub-agents spawned through the headless worker runtime. Task specs can tighten but not loosen them.

Fields

allowed_tools: Vec<String>

Tools that are always allowed regardless of role or task spec.

disallowed_tools: Vec<String>

Tools that are always disallowed, overriding role and task spec.

max_turns: u32

Hard ceiling on sub-agent steps (tool calls + model turns). Workers that exceed this are terminated. Default: unbounded (u32::MAX).

max_spawn_depth: u32

Recursive child-agent budget for headless fleet workers. Defaults to DEFAULT_SPAWN_DEPTH (3) so a fleet worker has the SAME recursion budget as a standalone sub-agent — fleet and sub-agents are one substrate, not two. Set 0 to block child agent calls (the root worker still runs); the value is clamped to MAX_SPAWN_DEPTH_CEILING.

append_system_prompt: String

Extra system prompt text appended to every headless worker. Useful for injecting org-wide policy or behavior constraints.

output_format: String

Output format for fleet worker results. "text" (default) or "stream-json" for newline-delimited JSON events.

Trait Implementations

impl Clone for FleetExecConfig

fn clone(&self) -> FleetExecConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FleetExecConfig

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

Formats the value using the given formatter.

impl Default for FleetExecConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for FleetExecConfig

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for FleetExecConfig

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

where __S: Serializer,

Serialize this value into the given Serde serializer.