Module primitives 

The L0 contract — frames on a wire

This module is the engineered surface of the wire layer: the closed set of primitives L0 exposes upward, curated and named. Everything a higher layer may rely on is here; everything absent is an implementation detail that can change without notice. (prelude remains the convenience glob; this module is the contract.)

L0 promises: a duplex, authenticated, resumable frame stream to the Live API — connect, write frames (audio/text/video/tool responses), read events — plus the audio machinery a realtime client needs at the edge (lock-free buffers, jitter absorption, VAD, barge-in detection).

L0 never: interprets a conversation, holds session state, dispatches a tool, or decides when to speak. It moves frames and tells the truth about time.

The primitives, by concern:

Concern	Primitives
Connect	SessionConfig, ConnectBuilder, ApiEndpoint, ResumeInfo
Speak / listen	SessionHandle, SessionWriter, SessionReader, SessionEvent, SessionPhase
Say things	Content, Part, Role, ModelId, Voice, Modality
Tools on the wire	Tool, FunctionDeclaration, FunctionCall, FunctionResponse, FunctionCallingBehavior, FunctionResponseScheduling
Real time	SpscRing, AudioJitterBuffer, bytes_to_i16, i16_to_bytes, BargeInDetector, TurnDetector
Access	AuthProvider, GoogleAIAuth, VertexAIAuth, Transport, TungsteniteTransport, Codec, JsonCodec
Truth	UsageMetadata, SessionError

Re-exports

pub use crate::protocol::types::ApiEndpoint;

pub use crate::protocol::types::Content;

pub use crate::protocol::types::FunctionCall;

pub use crate::protocol::types::FunctionCallingBehavior;

pub use crate::protocol::types::FunctionDeclaration;

pub use crate::protocol::types::FunctionResponse;

pub use crate::protocol::types::FunctionResponseScheduling;

pub use crate::protocol::types::Modality;

pub use crate::protocol::types::ModelId;

pub use crate::protocol::types::Part;

pub use crate::protocol::types::Role;

pub use crate::protocol::types::SessionConfig;

pub use crate::protocol::types::Tool;

pub use crate::protocol::types::UsageMetadata;

pub use crate::protocol::types::Voice;

pub use crate::session::ResumeInfo;

pub use crate::session::SessionError;

pub use crate::session::SessionEvent;

pub use crate::session::SessionHandle;

pub use crate::session::SessionPhase;

pub use crate::session::SessionReader;

pub use crate::session::SessionWriter;

pub use crate::transport::auth::AuthProvider;

pub use crate::transport::auth::GoogleAIAuth;

pub use crate::transport::auth::VertexAIAuth;

pub use crate::transport::ws::Transport;

pub use crate::transport::ws::TungsteniteTransport;

pub use crate::transport::Codec;

pub use crate::transport::ConnectBuilder;

pub use crate::transport::JsonCodec;

pub use crate::buffer::AudioJitterBuffer;

pub use crate::buffer::SpscConsumer;

pub use crate::buffer::SpscProducer;

pub use crate::buffer::SpscRing;

pub use crate::buffer::bytes_to_i16;

pub use crate::buffer::i16_to_bytes;

pub use crate::turn::BargeInDetector;

pub use crate::turn::TurnDetector;