Enum SubagentEvent 

#[non_exhaustive]
pub enum SubagentEvent {
    Message {
        text: String,
    },
    Thought {
        text: String,
    },
    ToolCall {
        id: String,
        title: String,
        kind: ToolKind,
        status: ToolCallStatus,
        raw_input: Option<Value>,
    },
    ToolCallUpdate {
        id: String,
        status: Option<ToolCallStatus>,
        title: Option<String>,
        raw_output: Option<Value>,
        content: ToolOutputBlock,
    },
    Plan {
        entries: Vec<PlanEntry>,
    },
    Usage {
        context_window: u64,
        tokens_in_context: u64,
    },
    Mode {
        id: String,
    },
    SessionInfo {
        title: Option<String>,
    },
}

A typed event produced by a running sub-agent session.

Everything the ACP session/update stream offers that the TUI can act on. Serialized form is stable snake_case so Phase 6 can persist and rehydrate it without a protocol-crate dependency.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Message

A chunk of the agent’s response text (the stream the TUI already renders as the sub-agent’s message).

Fields

text: String

The streamed text chunk.

Thought

A chunk of the agent’s internal reasoning.

Fields

text: String

The streamed reasoning chunk.

ToolCall

A tool call was initiated by the sub-agent.

Fields

id: String

Unique id of the call within the session.

title: String

Human-readable title describing what the tool is doing.

kind: ToolKind

Category of the tool.

status: ToolCallStatus

Execution status at emission time.

raw_input: Option<Value>

Raw input parameters, when the harness reports them.

ToolCallUpdate

An update to a previously announced tool call.

Fields

id: String

Id of the updated call.

status: Option<ToolCallStatus>

New status, when the update carries one.

title: Option<String>

New title, when the update carries one.

raw_output: Option<Value>

Raw output returned by the tool, when the update carries it.

content: ToolOutputBlock

Text extracted from the update’s content blocks (replaces, not extends — mirroring the ACP “collections are overwritten” rule).

Plan

The agent’s execution plan (complete replacement, per the ACP spec).

Fields

entries: Vec<PlanEntry>

The full list of plan entries in order.

Usage

Context window usage snapshot.

Fields

context_window: u64

Total context window size in tokens.

tokens_in_context: u64

Tokens currently in context.

Mode

The session mode changed.

Fields

id: String

The id of the new mode.

SessionInfo

Session metadata (title) was set or changed.

Fields

title: Option<String>

The session title, when one was set.

Trait Implementations

impl Clone for SubagentEvent

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SubagentEvent

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SubagentEvent

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SubagentEvent

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SubagentEvent

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 SubagentEvent