Struct Completed 

pub struct Completed {
    pub agent: String,
    pub prompt: String,
    pub result: String,
    pub agent_id: Option<String>,
    pub model: Option<String>,
    pub tokens: Option<u64>,
    pub duration_ms: Option<u64>,
}

One agent launch that Claude Code recorded as completed: the agent type, the prompt it was given, and the text of its result (a foreground result’s text parts; a background notification’s <result> body, or the whole notification when it has none).

Fields

agent: String

prompt: String

result: String

agent_id: Option<String>

The agent’s id, from the launch’s result or its notification’s <task-id>. What the outcome ledger dedupes on.

model: Option<String>

toolUseResult.resolvedModel of the launch.

tokens: Option<u64>

Tokens the agent used: totalTokens, or <subagent_tokens>.

duration_ms: Option<u64>

Wall time: totalDurationMs, or <duration_ms>.