Plan 3: scaffold Python test harness and stub client package

client/main.py

@@ -1,8 +1,11 @@
-"""Smart Assistant client entry point. Implemented in Plan 3."""
+"""Smart Assistant client entry point.
+
+The composition root lives in main(); see Plan 3 Task 11 for the full wiring.
+"""
 
 
 def main() -> None:
-    raise SystemExit("client.main: placeholder; full implementation comes in Plan 3.")
+    raise SystemExit("client.main: not yet implemented (see Plan 3 Task 11).")
 
 
 if __name__ == "__main__":

client/pair.py

@@ -1,8 +1,8 @@
-"""Smart Assistant pairing CLI. Implemented in Plan 3."""
+"""Pairing CLI; see Plan 3 Task 6 for the full implementation."""
 
 
 def main() -> None:
-    raise SystemExit("client.pair: placeholder; full implementation comes in Plan 3.")
+    raise SystemExit("client.pair: not yet implemented (see Plan 3 Task 6).")
 
 
 if __name__ == "__main__":

client/tests/conftest.py

@@ -0,0 +1,8 @@
+"""Shared pytest fixtures for the client test suite."""
+import sys
+from pathlib import Path
+
+# Make the repo root importable so `import client.<module>` works without install.
+REPO_ROOT = Path(__file__).resolve().parents[2]
+if str(REPO_ROOT) not in sys.path:
+    sys.path.insert(0, str(REPO_ROOT))