Build, Test, and Run

Pilot approves the Python flight plan. Initialize the repository when needed, establish the default branch and initial documentation state, create a clearly named feature branch, and implement only the approved Version 1 specification.

Add the program, automated tests, README, approved specification, `.gitignore`, and flight-log entry. Use only the Python standard library. Keep generated output out of Git.

Run the tests first. Then run the program with the verified Python command and inspect the JSON artifact. Report commands, test counts, approved fields, files changed, generated files, errors, limitations, Git status, and the exact rerun command. Do not stage, commit, push, or merge yet.