diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..f6d1246
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,50 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.14'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run tests
+        run: pytest tests/ -v
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: test
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.14'
+
+      - name: Build wheel
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade build
+          python -m build --wheel
+
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7e80239..2850f80 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,6 +1,10 @@
 name: Tests
 
-on: [push]
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
 
 jobs:
   test:
diff --git a/src/mock/__init__.py b/src/mock/__init__.py
index e69de29..41350bb 100644
--- a/src/mock/__init__.py
+++ b/src/mock/__init__.py
@@ -0,0 +1 @@
+from .local_workflow_runner import LocalWorkflowRunner
diff --git a/src/mock/local_workflow_runner.py b/src/mock/local_workflow_runner.py
new file mode 100644
index 0000000..4c5f545
--- /dev/null
+++ b/src/mock/local_workflow_runner.py
@@ -0,0 +1,131 @@
+import json
+import os
+from graphlib import CycleError, TopologicalSorter
+
+
+class LocalWorkflowRunner:
+    def __init__(self, source_dir, workflow_json_path):
+        self.source_dir = source_dir
+        self.workflow_json_path = workflow_json_path
+
+        workflow = self._load_workflow()
+        tasks = workflow.get("tasks")
+        if not isinstance(tasks, list):
+            raise ValueError("Workflow JSON must contain a 'tasks' list")
+
+        self._task_to_notebook = {}
+        self._task_dependencies = {}
+        self._notebook_insertion_order = []
+        self._parse_tasks(tasks)
+
+        self.dag = self._build_dag()
+        self.execution_order = self._build_execution_order()
+
+    def _load_workflow(self):
+        with open(self.workflow_json_path, "r", encoding="utf-8") as workflow_file:
+            return json.load(workflow_file)
+
+    def _parse_tasks(self, tasks):
+        for task in tasks:
+            if not isinstance(task, dict):
+                raise ValueError("Each task must be a JSON object")
+
+            task_key = task.get("task_key")
+            if not task_key:
+                raise ValueError("Each task must include a non-empty 'task_key'")
+            if task_key in self._task_to_notebook:
+                raise ValueError(f"Duplicate task_key found: {task_key}")
+
+            notebook_task = task.get("notebook_task")
+            if not isinstance(notebook_task, dict):
+                raise ValueError(f"Task '{task_key}' is missing 'notebook_task'")
+
+            notebook_path = notebook_task.get("notebook_path")
+            notebook_name = self._extract_notebook_name(notebook_path, task_key)
+            if notebook_name in self._notebook_insertion_order:
+                raise ValueError(f"Duplicate notebook name found: {notebook_name}")
+
+            depends_on = task.get("depends_on", [])
+            dependency_keys = []
+            if not isinstance(depends_on, list):
+                raise ValueError(f"Task '{task_key}' has invalid 'depends_on' format")
+            for dependency in depends_on:
+                if not isinstance(dependency, dict) or not dependency.get("task_key"):
+                    raise ValueError(
+                        f"Task '{task_key}' has malformed dependency entry"
+                    )
+                dependency_keys.append(dependency["task_key"])
+
+            self._task_to_notebook[task_key] = notebook_name
+            self._task_dependencies[task_key] = dependency_keys
+            self._notebook_insertion_order.append(notebook_name)
+
+    def _extract_notebook_name(self, notebook_path, task_key):
+        if not isinstance(notebook_path, str) or not notebook_path.strip():
+            raise ValueError(f"Task '{task_key}' has an invalid notebook_path")
+
+        notebook_name = notebook_path.rstrip("/").split("/")[-1]
+        if not notebook_name:
+            raise ValueError(f"Task '{task_key}' has an invalid notebook_path")
+        return notebook_name
+
+    def _build_dag(self):
+        dag = {notebook_name: set() for notebook_name in self._notebook_insertion_order}
+
+        for task_key, dependency_keys in self._task_dependencies.items():
+            current_notebook = self._task_to_notebook[task_key]
+            for dependency_key in dependency_keys:
+                if dependency_key not in self._task_to_notebook:
+                    raise ValueError(
+                        f"Task '{task_key}' depends on unknown task '{dependency_key}'"
+                    )
+
+                dependency_notebook = self._task_to_notebook[dependency_key]
+                dag[dependency_notebook].add(current_notebook)
+
+        return dag
+
+    def _build_execution_order(self):
+        predecessors = {
+            notebook_name: set() for notebook_name in self._notebook_insertion_order
+        }
+
+        for source_notebook, target_notebooks in self.dag.items():
+            for target_notebook in target_notebooks:
+                predecessors[target_notebook].add(source_notebook)
+
+        try:
+            return list(TopologicalSorter(predecessors).static_order())
+        except CycleError as exc:
+            raise ValueError("Workflow graph contains a cycle") from exc
+
+    def format_dag(self):
+        lines = []
+        for notebook_name in self._notebook_insertion_order:
+            outgoing = sorted(self.dag.get(notebook_name, set()))
+            if outgoing:
+                lines.append(f"- {notebook_name} -> [{', '.join(outgoing)}]")
+            else:
+                lines.append(f"- {notebook_name} -> []")
+
+        lines.append("Execution order:")
+        lines.append(" -> ".join(self.execution_order))
+        return "\n".join(lines)
+    
+
+    def _execfile(self, file_path, global_namespace, local_namespace):
+        with open(file_path, "r", encoding="utf-8") as file:
+            code = compile(file.read(), file_path, "exec")
+        exec(code, global_namespace, local_namespace)
+
+    def run_workflow(self):
+        execution_globals = {"__name__": "__main__"}
+        print(f"\nExecuting workflow: {self.workflow_json_path}\n")
+        print("==========================================")
+        print(self.format_dag())
+        for notebook_name in self.execution_order:
+            notebook_path = os.path.join(self.source_dir, f"{notebook_name}.py")
+            if not os.path.exists(notebook_path):
+                raise FileNotFoundError(f"Notebook file not found: {notebook_path}")
+            execution_globals["__file__"] = notebook_path
+            self._execfile(notebook_path, execution_globals, execution_globals)
diff --git a/src/mock/workflow_mock.py b/src/mock/workflow_mock.py
deleted file mode 100644
index dadf372..0000000
--- a/src/mock/workflow_mock.py
+++ /dev/null
@@ -1,2 +0,0 @@
-class WorkflowMock:
-    pass
\ No newline at end of file
diff --git a/tests/test_local_workflow_runner.py b/tests/test_local_workflow_runner.py
new file mode 100644
index 0000000..12f54d3
--- /dev/null
+++ b/tests/test_local_workflow_runner.py
@@ -0,0 +1,59 @@
+import json
+import os
+
+from src.mock.local_workflow_runner import LocalWorkflowRunner
+
+
+ROOT_DIR = os.path.dirname(os.path.dirname(__file__))
+WORKFLOW_SAMPLE_PATH = os.path.join(ROOT_DIR, "specs", "workflow_sample.json")
+
+
+def test_builds_dag_using_notebook_names():
+    runner = LocalWorkflowRunner("src", WORKFLOW_SAMPLE_PATH)
+
+    assert runner.dag["auxillary_dims"] == {"data_quality"}
+    assert runner.dag["reviews_fact"] == {"data_quality"}
+    assert runner.dag["data_quality"] == {"semantic_layer"}
+    assert runner.dag["semantic_layer"] == set()
+
+
+def test_execution_order_respects_dependencies():
+    runner = LocalWorkflowRunner("src", WORKFLOW_SAMPLE_PATH)
+    order = runner.execution_order
+
+    assert order.index("data_quality") > order.index("auxillary_dims")
+    assert order.index("data_quality") > order.index("reviews_fact")
+    assert order.index("semantic_layer") > order.index("data_quality")
+
+
+def test_run_workflow_executes_in_dependency_order(tmp_path):
+    source_dir = tmp_path / "local_src"
+    source_dir.mkdir()
+    log_file = tmp_path / "execution.log"
+
+    workflow = {
+        "tasks": [
+            {
+                "task_key": "first_task",
+                "notebook_task": {"notebook_path": "/Workspace/any/first"},
+            },
+            {
+                "task_key": "second_task",
+                "depends_on": [{"task_key": "first_task"}],
+                "notebook_task": {"notebook_path": "/Workspace/any/second"},
+            },
+            {
+                "task_key": "third_task",
+                "depends_on": [{"task_key": "first_task"}],
+                "notebook_task": {"notebook_path": "/Workspace/any/third"},
+            },
+        ]
+    }
+    workflow_path = tmp_path / "workflow.json"
+    workflow_path.write_text(json.dumps(workflow), encoding="utf-8")
+    for notebook_name in ["first", "second", "third"]:
+        script_path = source_dir / f"{notebook_name}.py"
+        script_path.write_text(f'print("Hello from notebook {notebook_name}")')
+
+    runner = LocalWorkflowRunner(str(source_dir), str(workflow_path))
+    runner.run_workflow()
\ No newline at end of file