Console Entry Points

The [project.scripts] line tasknoter = "tasknoter.cli:main" tells installers: create a command tasknoter that imports tasknoter.cli and calls main(). Your main receives no arguments — it reads sys.argv (usually via argparse from your Beginner course):

# src/tasknoter/cli.py
import argparse

def main():
    parser = argparse.ArgumentParser(prog="tasknoter")
    parser.add_argument("command", choices=["add", "list", "done"])
    parser.add_argument("text", nargs="?")
    args = parser.parse_args()
    if args.command == "add" and args.text:
        print(f"added: {args.text}")
    elif args.command == "list":
        print("listing...")

if __name__ == "__main__":
    main()

Professional CLI manners: exit codes matter (0 = success, non-zero = failure — raise SystemExit(2) or sys.exit(2)), errors go to stderr (print(..., file=sys.stderr)), and --help is generated for you. Scripts that respect these compose cleanly with other tools.

The capstone asks for exactly this shape: a main() that dispatches subcommands to your storage and service layers.