Adds a test that fails if any skill directory or agent file under
plugins/compound-engineering/ lacks the ce- prefix mandated by the
plugin's "Naming Convention" in AGENTS.md. Both filename and
frontmatter `name` are checked. Carries an explicit exemption list
(currently just `lfg`, which ships as the public command `/lfg`) so
future carve-outs require a written reason rather than silent bypass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>