Trait Session

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pub trait Session: Send + Sync {
    // Required methods
    fn id(&self) -> &str;
    fn app_name(&self) -> &str;
    fn user_id(&self) -> &str;
    fn state(&self) -> &dyn State;
    fn conversation_history(&self) -> Vec<Content>;

    // Provided methods
    fn conversation_history_for_agent(&self, _agent_name: &str) -> Vec<Content> { ... }
    fn append_to_history(&self, _content: Content) { ... }
    fn try_app_name(&self) -> Result<AppName> { ... }
    fn try_user_id(&self) -> Result<UserId> { ... }
    fn try_session_id(&self) -> Result<SessionId> { ... }
    fn try_identity(&self) -> Result<AdkIdentity> { ... }
}

Required Methods§

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fn conversation_history(&self) -> Vec<Content>

Returns the conversation history from this session as Content items

Provided Methods§

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fn conversation_history_for_agent(&self, _agent_name: &str) -> Vec<Content>

Returns conversation history filtered for a specific agent.

When provided, events authored by other agents (not “user”, not the named agent, and not function/tool responses) are excluded. This prevents a transferred sub-agent from seeing the parent’s tool calls mapped as “model” role, which would cause the LLM to think work is already done.

Default implementation delegates to conversation_history.

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