Prompt Optimizer

npx skills add affaan-m/ECC --skill prompt-optimizer

npx skills add affaan-m/ECC --skill prompt-optimizer -a claude-code -g

npx skills add affaan-m/ECC --skill prompt-optimizer -a codex -g

gemini skills install https://github.com/affaan-m/ECC.git --path docs/ja-JP/skills/prompt-optimizer

gh skill install affaan-m/ECC prompt-optimizer

git clone --depth 1 https://github.com/affaan-m/ECC /tmp/affaan-m__ECC
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/affaan-m__ECC/docs/ja-JP/skills/prompt-optimizer ~/.claude/skills/prompt-optimizer   # Claude Code
cp -R /tmp/affaan-m__ECC/docs/ja-JP/skills/prompt-optimizer ~/.agents/skills/prompt-optimizer   # Codex, Cursor, Gemini CLI, Copilot, OpenCode