"""Output-event shaping helpers for the runtime pipeline."""

from __future__ import annotations

from typing import Any, Dict


def assistant_text_delta_event(text: str, **extra: Any) -> Dict[str, Any]:
    """Build a normalized assistant text delta payload."""
    payload: Dict[str, Any] = {"type": "assistant.text.delta", "text": str(text)}
    payload.update(extra)
    return payload