feat: add NORTH_STAR.md and MVP core loop (Telegram bot + LLM + proposal generator)

steward/config.py

@@ -0,0 +1,35 @@
+"""Configuration management for Steward."""
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Application settings loaded from environment variables or .env file."""
+
+    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", extra="ignore")
+
+    # Telegram
+    telegram_bot_token: str = ""
+    telegram_allowed_user_ids: list[int] = []
+
+    # LLM (OpenAI-compatible)
+    openai_api_key: str = ""
+    openai_base_url: str = "https://api.openai.com/v1"
+    openai_model: str = "gpt-4o"
+    openai_system_prompt: str = (
+        "You are Steward, a persistent, trustworthy AI-assisted personal operations platform. "
+        "You reduce cognitive load by observing, remembering, planning, and proposing actions. "
+        "You are conservative, transparent, and policy-aware. "
+        "Always explain your reasoning."
+    )
+
+    # Analysis / proposal worker
+    analysis_target_url: str = ""
+    analysis_target_api_key: str = ""
+    analysis_cron_hour: int = 8
+    analysis_cron_minute: int = 0
+
+
+def get_settings() -> Settings:
+    """Return application settings singleton."""
+    return Settings()