Guidance for converting COBOL programs to modern languages (Python, Java, etc.) while preserving exact behavior and data format compatibility. This skill should be used when modernizing legacy COBOL applications, converting COBOL business logic to modern languages, or ensuring byte-for-byte output compatibility between COBOL and its replacement.
Install
npx skills add benchflow-ai/skillsbench --skill cobol-modernizationnpx skills add benchflow-ai/skillsbench --skill cobol-modernization -a claude-code -gnpx skills add benchflow-ai/skillsbench --skill cobol-modernization -a codex -ggemini skills install https://github.com/benchflow-ai/skillsbench.git --path registry/terminal_bench_2.0/letta_skills_batch/terminal_bench_2_0_cobol-modernization/environment/skills/cobol-modernizationgh skill install benchflow-ai/skillsbench cobol-modernizationgit clone --depth 1 https://github.com/benchflow-ai/skillsbench /tmp/benchflow-ai__skillsbench
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/benchflow-ai__skillsbench/registry/terminal_bench_2.0/letta_skills_batch/terminal_bench_2_0_cobol-modernization/environment/skills/cobol-modernization ~/.claude/skills/cobol-modernization # Claude Code
cp -R /tmp/benchflow-ai__skillsbench/registry/terminal_bench_2.0/letta_skills_batch/terminal_bench_2_0_cobol-modernization/environment/skills/cobol-modernization ~/.agents/skills/cobol-modernization # Codex, Cursor, Gemini CLI, Copilot, OpenCode