Check pypi version on startup

src/haiku/rag/cli.py

@@ -5,7 +5,7 @@ import typer
 from rich.console import Console
 
 from haiku.rag.app import HaikuRAGApp
-from haiku.rag.utils import get_default_data_dir
+from haiku.rag.utils import get_default_data_dir, is_up_to_date
 
 cli = typer.Typer(
     context_settings={"help_option_names": ["-h", "--help"]}, no_args_is_help=True
@@ -15,6 +15,23 @@ console = Console()
 event_loop = asyncio.get_event_loop()
 
 
+async def check_version():
+    """Check if haiku.rag is up to date and show warning if not."""
+    up_to_date, current_version, latest_version = await is_up_to_date()
+    if not up_to_date:
+        console.print(
+            f"[yellow]Warning: haiku.rag is outdated. Current: {current_version}, Latest: {latest_version}[/yellow]"
+        )
+        console.print("[yellow]Please update.[/yellow]")
+
+
+@cli.callback()
+def main():
+    """haiku.rag CLI - SQLite-based RAG system"""
+    # Run version check before any command
+    event_loop.run_until_complete(check_version())
+
+
 @cli.command("list", help="List all stored documents")
 def list_documents(
     db: Path = typer.Option(

src/haiku/rag/utils.py

@@ -1,6 +1,10 @@
 import sys
+from importlib import metadata
 from pathlib import Path
 
+import httpx
+from packaging.version import Version, parse
+
 
 def get_default_data_dir() -> Path:
     """
@@ -23,3 +27,23 @@ def get_default_data_dir() -> Path:
 
     data_path = system_paths[sys.platform]
     return data_path
+
+
+async def is_up_to_date() -> tuple[bool, Version, Version]:
+    """
+    Checks whether haiku.rag is current.
+
+    :return: A tuple containing a boolean indicating whether haiku.rag is current, the running version and the latest version
+    :rtype: tuple[bool, Version, Version]
+    """
+
+    async with httpx.AsyncClient() as client:
+        running_version = parse(metadata.version("haiku.rag"))
+        try:
+            response = await client.get("https://pypi.org/pypi/haiku.rag/json")
+            data = response.json()
+            pypi_version = parse(data["info"]["version"])
+        except Exception:
+            # If no network connection, do not raise alarms.
+            pypi_version = running_version
+    return running_version >= pypi_version, running_version, pypi_version