No trailing indentation in prompts; preserve fenced body whitespace and Python helpers. Accept semantic HTML attribute/text equivalents; browser behavior and parser syntax are reported independently. Add diagnostic hidden-test pass rate; primary all-tests-required macro score unchanged. Fixed 350 data/test/reference files unchanged. Live browser validation still outstanding.
2000 generated examples; exact language/difficulty allocation, isolated runners and Hugging Face evaluation. Static audit passes. Full reference and negative-control execution remains unverified because a Docker/Podman sandbox is unavailable.
