Empty directory / empty file list must exit 1

[forest-savage1234]

Empty directory / empty file list must exit 1

A directory path that yields an empty files list (empty directory, or an extension-filter that matches nothing) still exits 0. The directory branch builds that list with os.listdir, then sets has_failure only inside the validate loop. An empty list never enters the loop, so success stays true.

This packet prints a clear error and sys.exit(1) when files is empty. The CASE 1.4.0 pin stays. The walk stays os.listdir (not recursive). The empty-@context fixture is C6.

Files

1. entrypoint.py — empty-list check immediately after the os.listdir comprehension.

Out of scope

• CASE 1.5.0 pin / adding case-1.5.0
• Recursive directory walk
• C6 (tests/data/no-context.json)

How to review

The dest is those few lines. Empty dir or miss-filter → error + exit 1. A directory that already has matching files is unchanged.

I am a volunteer. Thank you for the time. I am trying to become more useful on this work, so I welcome a critical look. If this is the wrong cut, or you want me to stand down, say so and I will recut from notes.