diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
new file mode 100644
index 0000000..f231ba4
--- /dev/null
+++ b/.github/workflows/pr-check.yml
@@ -0,0 +1,29 @@
+name: PR Check
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v6
+        with:
+          enable-cache: true
+
+      - name: Install dependencies
+        run: uv sync --group dev
+
+      - name: Run test suite
+        run: uv run pytest
diff --git a/.gitignore b/.gitignore
index deae0a4..0432415 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,3 +71,4 @@ build/
 .claude/settings.local.json
 .claude/memory/
 .claude/scheduled_tasks.json
+.omx/
diff --git a/README.md b/README.md
index eda3530..1b1f5e6 100644
--- a/README.md
+++ b/README.md
@@ -135,6 +135,9 @@ agent = create_code_agent(
 ```bash
 # Run the agent (approvals enabled by default)
 python -m deep_code_agent
+
+# Show the installed CLI version
+python -m deep_code_agent --version
 ```
 
 When using the CLI, you'll be prompted for approval when the agent attempts to modify files or execute commands:
diff --git a/src/deep_code_agent/cli.py b/src/deep_code_agent/cli.py
index edaf254..544bb19 100644
--- a/src/deep_code_agent/cli.py
+++ b/src/deep_code_agent/cli.py
@@ -3,6 +3,8 @@
 import argparse
 from typing import TYPE_CHECKING, Any
 
+from deep_code_agent import __version__
+
 if TYPE_CHECKING:
     from langchain_core.runnables import RunnableConfig
 
@@ -184,6 +186,7 @@ def _handle_interrupt(agent, interrupt_data, config: "RunnableConfig") -> dict[s
 
 def main() -> None:
     parser = argparse.ArgumentParser(prog="deep-code-agent", description="Deep Code Agent CLI")
+    parser.add_argument("--version", action="version", version=f"%(prog)s {__version__}")
     parser.add_argument("--backend-type", choices=["state", "filesystem"], default="state", help="Backend type")
     parser.add_argument("--model-name", default=None, help="Model name")
     parser.add_argument("--model-provider", default="openai", help="Model provider")
diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..6b18322
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,19 @@
+"""Tests for CLI argument handling."""
+
+from unittest.mock import patch
+
+import pytest
+
+from deep_code_agent import __version__
+from deep_code_agent.cli import main
+
+
+def test_main_prints_version_and_exits(capsys):
+    """The CLI should expose the packaged version via --version."""
+    with patch("sys.argv", ["deep-code-agent", "--version"]):
+        with pytest.raises(SystemExit) as exc_info:
+            main()
+
+    assert exc_info.value.code == 0
+    captured = capsys.readouterr()
+    assert captured.out.strip() == f"deep-code-agent {__version__}"