Expand run_evals.py beyond the current assertion set.\n\nUseful candidates:\n- forbidden_regex\n- required_json_key\n- max_line_count\n- exact_section_order\n\nAcceptance criteria:\n- Add at least two assertion types.\n- Add self-tests.\n- Update docs/evals-and-benchmarks.md.
Expand run_evals.py beyond the current assertion set.\n\nUseful candidates:\n- forbidden_regex\n- required_json_key\n- max_line_count\n- exact_section_order\n\nAcceptance criteria:\n- Add at least two assertion types.\n- Add self-tests.\n- Update docs/evals-and-benchmarks.md.