feat: project management module — create, log, read, list, server persistence

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/conftest.py

@@ -0,0 +1,8 @@
+import pytest
+
+@pytest.fixture
+def tmp_workbench(tmp_path):
+    """Provide a temporary workbench directory."""
+    wb = tmp_path / "workbench"
+    wb.mkdir()
+    return wb