Codex Smoke Hello

What shipped

A minimal, runnable hello-world sandbox build:

• hello.py: a dependency-free Python CLI that prints a greeting
• smoke_test.sh: a small verification script covering default, argument, and environment-driven execution
• README.md: setup, run, and demo instructions

Architecture

• Used plain Python instead of a framework to keep the build maximally inspectable and trivial to run.
• Kept the app as a single file because the brief explicitly called for the smallest real end-to-end slice.
• Added a Bash smoke script instead of a heavier test framework to preserve zero-dependency local execution.

Trimmed scope

• No external APIs
• No package manager or virtual environment requirements
• No web UI, persistence, or framework scaffolding
• No formal unit test framework beyond the smoke script

Limitations

• This is a CLI-only smoke test build.
• The app performs one task only: printing a greeting.
• Input handling is intentionally minimal.

Suggested next steps

1. Add a tiny HTTP server mode if the next stage needs a browser-facing surface.
2. Add structured tests with unittest or pytest if the project grows beyond a single script.
3. Add packaging metadata if this should become an installable tool.