gemini-live-harness

Durable file-backed harness state, shared host-tool execution contracts, and host-side orchestration for Gemini Live applications.

This crate sits above gemini-live-runtime and below concrete hosts. It keeps tasks, notifications, and long-lived memory on disk so state survives process restarts and remains inspectable by other local agents. It also owns the host-fed ToolProvider / ToolExecutor surface used by hosts and reusable tool families, plus the harness-side execution wrapper that can keep blocking tools inline within a latency budget and spill eligible calls into durable background tasks. The preferred host boundaries are:

• HarnessController for durable tools + passive notification delivery
• HarnessRuntimeBridge for runtime tool-call orchestration and completion forwarding