Pipeline nodes and hooks

Status: intentionally different.

Use Go tools and session events instead of LiveKit's exact pipeline-node API.

In rtp-agent, a callable tool implements the llm.Tool interface. The model path can execute those tools during generation, and core/agent/events.go exposes events for tool execution, speech, interruption, and run context behavior.

What to use

• Add tools to Agent.Tools.
• Use Agent.UpdateTools when tools must change at runtime.
• Use llm.ToolFlagger when a tool needs supported flags such as ToolFlagIgnoreOnEnter or ToolFlagCancellable.
• Use llm.ToolDuplicateModer when duplicate tool calls need reject, replace, or confirm behavior.
• Use MCP servers when tools come from an external process or HTTP endpoint.

This is not a node graph API. Keep custom pipeline behavior in ordinary Go code unless a future source package introduces named pipeline nodes.

Evidence:

• core/agent/generation.go
• core/agent/agent.go
• core/agent/events.go
• core/llm/llm.go
• core/llm/mcp.go