feat: --version flag (#86)

Author: sdn4z

justfile

@@ -1,7 +1,7 @@
 # VARIABLE DEFINITIONS
 venv := ".venv"
 python_version :="3.13"
-run := "poetry run"
+run := "uv run"
 eval_path := "eval/cli.py"
 
 venv-exists := path_exists(venv)

src/lightman_ai/cli.py

@@ -1,4 +1,5 @@
 import logging
+from pathlib import Path
 
 import click
 from dotenv import load_dotenv
@@ -12,7 +13,17 @@
 logger = logging.getLogger("lightman")
 
 
+def get_version() -> str:
+    """Read version from VERSION file."""
+    try:
+        version_file = Path(__file__).resolve().parents[2] / "VERSION"
+        return version_file.read_text().strip()
+    except FileNotFoundError:
+        return "unknown"
+
+
 @click.group()
+@click.version_option(version=get_version(), prog_name="lightman-ai")
 def entry_point() -> None:
     pass