Struct Harness 

pub struct Harness {
    pub name: String,
    pub register: Vec<String>,
    pub registered: Vec<String>,
    pub config: Option<String>,
    pub marker: Option<String>,
    pub snippet: Option<String>,
    pub skills: Option<String>,
    pub hooks: Option<String>,
    pub hook_events: Vec<String>,
}

One agent runner, as the seat’s own configuration describes it. The seat ships no runner’s name: the file at harnesses_path names them, one table each, and onboard and doctor read it.

A runner registers MCP servers one of two ways. register is a command that does it ({server} is replaced by the path to ljos-mcp) and registered a command that exits 0 once it is done. Or config is a file the runner reads, marker a line that means the entry is present, and snippet what to append when it is not. skills is the directory the runner loads skills from; the protocol goes to <skills>/ljos/SKILL.md.

Fields

name: String

register: Vec<String>

registered: Vec<String>

config: Option<String>

marker: Option<String>

snippet: Option<String>

skills: Option<String>

hooks: Option<String>

A JSON settings file the runner reads hooks from, in the shape {"hooks": {"<Event>": [{"matcher": "...", "hooks": [{"type": "command", "command": "..."}]}]}}. onboard merges the seat’s memory hook into it, so what the seat knows about a command or a prompt reaches the agent at the point of action.

hook_events: Vec<String>

The events the memory hook fires on. Empty means HOOK_EVENTS, the prompt event alone: a panel of this seat’s personas settled on prompts over tool calls, because a turn issues many shell commands and one prompt. ["UserPromptSubmit", "PreToolUse"] injects on both.

Trait Implementations

impl Clone for Harness

fn clone(&self) -> Harness

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Harness

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

Formats the value using the given formatter.

impl Default for Harness

fn default() -> Harness

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Harness

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Harness

impl PartialEq for Harness

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Harness

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 Harness