build_system_prompt (prompt.py)

Build the system prompt for a call by injecting live values into the template. WHY a template + injector: the persona/rules live in voice_agent_system_prompt.md (editable without touching code), and only the volatile bits — today's date, the current IST time, business hours, and

"""Build the system prompt for a call by injecting live values into the template.

WHY a template + injector: the persona/rules live in voice_agent_system_prompt.md
(editable without touching code), and only the volatile bits — today's date, the
current IST time, business hours, and the caller's number — are filled in per call.
"""

from __future__ import annotations

import os
from datetime import datetime, timedelta, timezone
from pathlib import Path

_PROMPT_PATH = Path(__file__).parent / "voice_agent_system_prompt.md"
_IST = timezone(timedelta(hours=5, minutes=30))


def _load_template() -> str:
    return _PROMPT_PATH.read_text(encoding="utf-8")


def build_system_prompt(caller_phone: str = "unknown", now: datetime | None = None) -> str:
    """Return the full system prompt with place

... (truncated -- full source via MCP)