fix: accept CSV telegram ID config (#27)

Co-authored-by: openhands <openhands@all-hands.dev>

steward/config.py

@@ -8,16 +8,50 @@ Supports configuration via:
 Environment variables take precedence over config file values.
 """
 
+import json
 import logging
 import os
 from pathlib import Path
+from typing import Any
 
 from omegaconf import OmegaConf
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, ConfigDict, Field, field_validator
 
 logger = logging.getLogger(__name__)
 
 
+def _parse_int_list(value: Any) -> Any:
+    if isinstance(value, int):
+        return [value]
+    if not isinstance(value, str):
+        return value
+
+    text = value.strip()
+    if not text:
+        return []
+
+    if len(text) >= 2 and text[0] == text[-1] and text[0] in {"'", '"'}:
+        text = text[1:-1].strip()
+        if not text:
+            return []
+
+    if text.startswith("["):
+        try:
+            parsed = json.loads(text)
+        except json.JSONDecodeError:
+            pass
+        else:
+            if isinstance(parsed, list):
+                return parsed
+
+    try:
+        return [int(item.strip().strip("'\"")) for item in text.split(",") if item.strip()]
+    except ValueError as exc:
+        raise ValueError(
+            "expected a comma-separated list of integers or a JSON integer list"
+        ) from exc
+
+
 class TelegramConfig(BaseModel):
     """Telegram bot configuration."""
 
@@ -25,6 +59,11 @@ class TelegramConfig(BaseModel):
     allowed_user_ids: list[int] = Field(default_factory=list, description="Allowed user IDs")
     group_ids: list[int] = Field(default_factory=list, description="Allowed group/channel IDs")
 
+    @field_validator("allowed_user_ids", "group_ids", mode="before")
+    @classmethod
+    def parse_int_list(cls, value: Any) -> Any:
+        return _parse_int_list(value)
+
 
 class OpenAIConfig(BaseModel):
     """OpenAI/LLM configuration."""
@@ -186,8 +225,6 @@ def _load_config_from_env() -> dict:
         # Try to parse value as JSON first (for lists, etc.)
         if isinstance(cfg[section], dict):
             try:
-                import json
-
                 cfg[section][setting_key] = json.loads(value)
             except (json.JSONDecodeError, ValueError):
                 cfg[section][setting_key] = value