Add the invariant-gateway CLI script.

gateway/__main__.py

@@ -0,0 +1,36 @@
+"""Script is used to run actions using the Invariant Gateway."""
+
+import sys
+
+
+def main():
+    """Entry point for the Invariant Gateway."""
+    actions = {
+        "mcp": "Runs the Invariant Gateway against MCP (Model Context Protocol) servers with guardrailing and push to Explorer features",
+        "llm": "Runs the Invariant Gateway against LLM providers with guardrailing and push to Explorer features",
+        "help": "Shows this help message",
+    }
+
+    def _help():
+        """Prints the help message."""
+        print("\nSupported Commands by invariant-gateway:\n")
+        for verb, description in actions.items():
+            print(f"{verb}: {description}")
+
+    if len(sys.argv) < 2:
+        _help()
+        sys.exit(1)
+
+    verb = sys.argv[1]
+    if verb == "mcp":
+        # Use sys.argv[2:] to pass arguments to the MCP gateway
+        return 0
+    if verb == "llm":
+        # Use sys.argv[2:] to pass arguments to the LLM gateway
+        print("LLM gateway via the invariant-gateway command is not implemented yet.")
+        return 1
+    if verb == "help":
+        _help()
+        return 0
+    print(f"Unknown action: {verb}")
+    return 1

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "invariant-gateway"
-version = "0.1.0"
+version = "0.0.1"
 description = "LLM proxy to observe and debug what your AI agents are doing"
 readme = "README.md"
 requires-python = ">=3.12"
@@ -16,6 +16,9 @@ dependencies = [
 [tool.setuptools.packages.find]
 where = ["."]
 
+[project.scripts]
+invariant-gateway = "gateway.__main__:main"
+
 [build-system]
 requires = ["setuptools>=61.0", "wheel"]
 build-backend = "setuptools.build_meta"