diff --git a/actions/hello.yaml b/actions/hello.yaml
index f978f89..1a46545 100644
--- a/actions/hello.yaml
+++ b/actions/hello.yaml
@@ -9,6 +9,9 @@ enabled: true
 # Runner type determines how the action is executed
 runner_type: python
 
+# Minimum Python version required (semver constraint)
+runtime_version: ">=3.9"
+
 # Entry point is the Python script to execute
 entry_point: hello.py
 
diff --git a/actions/http_example.yaml b/actions/http_example.yaml
index 93c0369..9d7c0d9 100644
--- a/actions/http_example.yaml
+++ b/actions/http_example.yaml
@@ -9,6 +9,9 @@ enabled: true
 # Runner type
 runner_type: python
 
+# Minimum Python version required (semver constraint)
+runtime_version: ">=3.9"
+
 # Entry point
 entry_point: http_example.py
 
diff --git a/actions/list_numbers.py b/actions/list_numbers.py
new file mode 100644
index 0000000..3069969
--- /dev/null
+++ b/actions/list_numbers.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+"""
+List Numbers Action - Python Example Pack
+
+Returns a list of sequential integers as JSON.
+Result format: {"items": [start, start+1, ..., start+n-1]}
+
+Actions receive parameters as JSON on stdin and write results to stdout.
+"""
+
+import json
+import sys
+
+
+def main():
+    # Read parameters from stdin (JSON format)
+    params = json.loads(sys.stdin.readline())
+    n = int(params.get("n", 10))
+    start = int(params.get("start", 0))
+
+    result = {"items": list(range(start, n + start))}
+    print(json.dumps(result))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/actions/list_numbers.yaml b/actions/list_numbers.yaml
new file mode 100644
index 0000000..6c8eabc
--- /dev/null
+++ b/actions/list_numbers.yaml
@@ -0,0 +1,47 @@
+# List Numbers Action
+# Returns a list of sequential integers as JSON
+
+ref: python_example.list_numbers
+label: "List Numbers"
+description: "Returns a list of sequential integers starting from a given value"
+enabled: true
+
+# Runner type determines how the action is executed
+runner_type: python
+
+# Minimum Python version required (semver constraint)
+runtime_version: ">=3.9"
+
+# Entry point is the Python script to execute
+entry_point: list_numbers.py
+
+# Parameter delivery: stdin for secure parameter passing
+parameter_delivery: stdin
+parameter_format: json
+
+# Output format: json (structured data parsing enabled)
+output_format: json
+
+# Action parameters schema (flat format with inline required/secret)
+parameters:
+  n:
+    type: integer
+    description: "How many numbers to generate"
+    default: 10
+  start:
+    type: integer
+    description: "Starting value of the sequence"
+    default: 0
+
+# Output schema (flat format)
+output_schema:
+  items:
+    type: array
+    description: "The list of sequential integers"
+    required: true
+
+# Tags for categorization
+tags:
+  - python
+  - example
+  - utility
diff --git a/actions/read_counter.yaml b/actions/read_counter.yaml
index a1e9cd9..c125a33 100644
--- a/actions/read_counter.yaml
+++ b/actions/read_counter.yaml
@@ -8,6 +8,8 @@ enabled: true
 
 # Runner type
 runner_type: python
+# Minimum Python version required (semver constraint)
+runtime_version: ">=3.9"
 
 # Entry point
 entry_point: read_counter.py
diff --git a/sensors/counter_sensor.yaml b/sensors/counter_sensor.yaml
index c373a8c..e7e358e 100644
--- a/sensors/counter_sensor.yaml
+++ b/sensors/counter_sensor.yaml
@@ -13,6 +13,9 @@ enabled: true
 # Sensor runner type
 runner_type: python
 
+# Minimum Python version required
+runtime_version: ">=3.9"
+
 # Entry point for sensor execution
 entry_point: counter_sensor.py