make a single agent

app/agents/timeline_agent.py

@@ -2,17 +2,27 @@
 
 from __future__ import annotations
 
+import re
 from typing import Any
 
 from langchain_core.tools import tool
 
 from app.core.ws_context import execute_on_client
 
+_UUID_RE = re.compile(
+    r"^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$"
+)
+
+
+def _is_uuid(value: str) -> bool:
+    return bool(_UUID_RE.match(value))
+
 TIMELINE_SYSTEM_PROMPT = (
     "You are a project timeline assistant. Timelines are milestone dates that\n"
     "track progress on a project — they are not calendar events.\n\n"
     "Rules:\n"
     "  - project_id is REQUIRED for every create; confirm with the user if unknown\n"
+    "  - For listing, project_id must be a UUID; never pass plain names as project_id\n"
     "  - date is a Unix timestamp in milliseconds; convert human-readable dates\n"
     "  - is_ai_suggested: 1 when proactively proposing a timeline, 0 otherwise\n"
     "  - is_approved: 0 until the user explicitly confirms; then 1\n"
@@ -25,10 +35,11 @@ TIMELINE_SYSTEM_PROMPT = (
 @tool
 async def list_timelines(project_id: str = "") -> str:
     """List timelines. Provide project_id to scope to a specific project."""
+    normalized_project_id = project_id if (project_id and _is_uuid(project_id)) else ""
     result = await execute_on_client(
         action="select",
         table="timelines",
-        filters={"projectId": project_id or None},
+        filters={"projectId": normalized_project_id or None},
     )
     rows = result.get("rows", [])
     if not rows: