diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 8a6bfdbdb..ec87e3056 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,7 +10,7 @@ jobs:
       uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
     - name: Setup Python
-      uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3
       with:
         python-version: '3.11'
         cache: 'pip'
diff --git a/.github/workflows/license.yml b/.github/workflows/license.yml
index 1b0c49c2e..f52c54d6e 100644
--- a/.github/workflows/license.yml
+++ b/.github/workflows/license.yml
@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Set up Python 3.11
-        uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f
+        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3
         with:
           python-version: '3.11'
           cache: 'pip'
diff --git a/.github/workflows/run.yml b/.github/workflows/run.yml
index 638121283..43312adb5 100644
--- a/.github/workflows/run.yml
+++ b/.github/workflows/run.yml
@@ -152,10 +152,11 @@ jobs:
 
       - name: Dry run kripke/rocm on Tioga with allocation modifier
         run: |
-          ./bin/benchpark setup kripke/rocm LLNL-Tioga-HPECray-zen3-MI250X-Slingshot workspace/
+          ./bin/benchpark system init --dest=tioga-system tioga rocm=551 compiler=cce ~gtl
+          ./bin/benchpark setup kripke/rocm ./tioga-system workspace/
           . workspace/setup.sh
           ramble \
-            --workspace-dir workspace/kripke/rocm/LLNL-Tioga-HPECray-zen3-MI250X-Slingshot/workspace \
+            --workspace-dir workspace/kripke/rocm/Tioga/workspace \
             --disable-progress-bar \
             --disable-logger \
             workspace setup --dry-run
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 424daef5f..726d183dc 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Set up Python 3.11
-        uses: actions/setup-python@39cd14951b08e74b54015e9e001cdefcf80e669f
+        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3
         with:
           python-version: '3.11'
           cache: 'pip'
diff --git a/docs/4-benchpark-setup.rst b/docs/4-benchpark-setup.rst
index 270633c67..47ad2a956 100644
--- a/docs/4-benchpark-setup.rst
+++ b/docs/4-benchpark-setup.rst
@@ -15,7 +15,7 @@ Also choose a directory for your experiment::
 where:
 
 - ``<Benchmark/ProgrammingModel>``: amg2023/openmp | amg2023/cuda | saxpy/openmp (available choices in ``benchpark/experiments``)
-- ``<System>``: nosite-x86_64 | LLNL-Sierra-IBM-power9-V100-Infiniband | RCCS-Fugaku-Fujitsu-A64FX-TofuD | nosite-AWS_PCluster_Hpc7a-zen4-EFA (available choices in :doc:`available-system-specs`)
+- ``<System>``: use ``benchpark system init``, or a predefined system in :doc:`available-system-specs`)
 
 This command will assemble a Ramble workspace per experiment
 with a configuration for the specified benchmark and system
diff --git a/docs/add-a-system-config.rst b/docs/add-a-system-config.rst
index 9efa6438b..5a6aacea9 100644
--- a/docs/add-a-system-config.rst
+++ b/docs/add-a-system-config.rst
@@ -7,9 +7,45 @@
 Adding a System Specification
 =============================
 
-``benchpark/configs`` contains a directory for each system specified in Benchpark.
-If your system is unlike the available configurations,
-you can add a new directory with a name which identifies the system.
+System specifications include details like
+
+- How many CPUs are there per node on the system
+- What pre-installed MPI/GPU libraries are available
+
+A system description is a set of YAML files collected into a directory.
+You can generate these files directly, but Benchpark also provides an API
+where you can represent systems as objects and customize their description
+with command line arguments.
+
+Using System API to Generate a System Description
+-------------------------------------------------
+
+System classes are defined in ``var/sys_repo``; once the class has been
+defined, you can invoke ``benchpark system init`` to generate a system
+configuration directory that can then be passed to ``benchpark setup``::
+
+    benchpark system init --dest=tioga-system tioga rocm=551 compiler=cce ~gtl
+
+where "tioga rocm=551 compiler=cce ~gtl" describes a config for Tioga that
+uses ROCm 5.5.1 components, a CCE compiler, and MPI without GTL support.
+
+If you want to add support for a new system you can add a class definition
+for that system in a separate directory in ``var/sys_repo/systems/``. For
+example the Tioga system is defined in::
+
+  $benchpark
+  ├── var
+     ├── sys_repo
+        ├── systems
+           ├── tioga
+              ├── system.py
+
+Static System Configurations
+----------------------------
+
+``benchpark/configs`` contains a number of static, manually-generated system
+definitions. As an alternative to implementing a new ``System`` class, you
+can add a new directory with a name which identifies the system.
 
 The naming convention for the systems is as following::
 
diff --git a/modifiers/caliper-mpi/modifier.py b/modifiers/caliper-mpi/modifier.py
index 6d48e6983..444a7436b 100644
--- a/modifiers/caliper-mpi/modifier.py
+++ b/modifiers/caliper-mpi/modifier.py
@@ -21,7 +21,7 @@ class CaliperMpi(CaliperBase):
 
     env_var_modification(
         "CALI_CONFIG",
-        "spot(output={}, profile.mpi)".format(_cali_datafile),
+        "spot(output={},profile.mpi,mpi.message.size,mpi.message.count)".format(_cali_datafile),
         method="set",
         modes=["mpi"],
     )