Initial open-source release

Claude-Session: https://claude.ai/code/session_01B65qLEKnkeYTGdbwhLpjCu

fixtures/python-app/src/tasks/cli.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import argparse
+from datetime import date, timedelta
+
+from .models import Priority, TaskList
+
+
+def build_demo() -> TaskList:
+    today = date.today()
+    tasks = TaskList()
+    tasks.add("Write release notes", Priority.HIGH, today + timedelta(days=1), "docs")
+    tasks.add("Fix flaky test", Priority.HIGH, today - timedelta(days=2), "ci")
+    tasks.add("Update dependencies", Priority.LOW, None, "chore")
+    return tasks
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(prog="tasks")
+    parser.add_argument("--overdue", action="store_true", help="only show overdue tasks")
+    args = parser.parse_args(argv)
+
+    tasks = build_demo()
+    # Set a breakpoint here (QA: debugger) and inspect `tasks`.
+    shown = tasks.overdue(date.today()) if args.overdue else tasks.pending()
+    for task in shown:
+        flag = "!" if task.priority is Priority.HIGH else " "
+        print(f"{flag} {task.title} ({', '.join(sorted(task.tags))})")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())