Prompt engineering frameworks for building, testing, versioning, and evaluating prompts: chain-of-thought, few-shot, regression testing, and rubrics. Use when designing production prompts, running A/B tests, or building prompt libraries.
Install
npx skills add borghei/Claude-Skills --skill prompt-engineer-toolkitnpx skills add borghei/Claude-Skills --skill prompt-engineer-toolkit -a claude-code -gnpx skills add borghei/Claude-Skills --skill prompt-engineer-toolkit -a codex -ggemini skills install https://github.com/borghei/Claude-Skills.git --path engineering/prompt-engineer-toolkitgh skill install borghei/Claude-Skills prompt-engineer-toolkitgit clone --depth 1 https://github.com/borghei/Claude-Skills /tmp/borghei__Claude-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/borghei__Claude-Skills/engineering/prompt-engineer-toolkit ~/.claude/skills/prompt-engineer-toolkit # Claude Code
cp -R /tmp/borghei__Claude-Skills/engineering/prompt-engineer-toolkit ~/.agents/skills/prompt-engineer-toolkit # Codex, Cursor, Gemini CLI, Copilot, OpenCode