diff --git a/package.py b/package.py
new file mode 100644
index 0000000..a5b259b
--- /dev/null
+++ b/package.py
@@ -0,0 +1,51 @@
+# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+# ----------------------------------------------------------------------------
+# If you submit this package back to Spack as a pull request,
+# please first remove this boilerplate and all FIXME comments.
+#
+# This is a template package file for Spack.  We've put "FIXME"
+# next to all the things you'll want to change. Once you've handled
+# them, you can save this file and test your package like this:
+#
+#     spack install spack-exercise
+#
+# You can edit this file again by typing:
+#
+#     spack edit spack-exercise
+#
+# See the Spack documentation for more information on packaging.
+# ----------------------------------------------------------------------------
+
+from spack.package import *
+
+
+class SpackExercise(CMakePackage):
+    """Spack Exercise"""
+
+    
+    homepage = "https://simulation-software-engineering.github.io/homepage/"
+    url = "https://github.com/Simulation-Software-Engineering/spack-exercise/archive/refs/tags/v0.1.0.tar.gz"
+
+
+    # notify when the package is updated.
+    maintainers("luosg")
+
+    
+    # See https://spdx.org/licenses/ for a list. Upon manually verifying
+    # the license, set checked_by to your Github username.
+    license("MIT-LICENSE", checked_by="luosg")
+
+    version("0.3.0", sha256="e54a4c037941d85a22fb3e6e73195df8448cf69a96aa44ef374ac518344812f0")
+    version("0.2.0", sha256="3dd6b4cc0f7aff179d8e290bc3879056237ae372738a4bd7222f6450fbcdfc77")
+    version("0.1.0", sha256="cac78e641cb703e3fe51956f91fe8347ac52f74ef037d8eadae5777c65a19a00")
+
+
+    depends_on("cxx", type="build")
+
+    depends_on("boost@1.65.1:", when="@0.2.0:")
+    depends_on("yaml-cpp@0.7.0:", when="@0.3.0:")
+