Solve circular PPh 21 tax allowance equations (Gross-Up) and evaluate PMK 66/2023 benefit-in-kind (Natura/Kenikmatan) monthly taxability thresholds.
Install
npx skills add adamriofc/indonesia-business-agent-skills --skill pph21-grossup-indonesia-business-agent-skillnpx skills add adamriofc/indonesia-business-agent-skills --skill pph21-grossup-indonesia-business-agent-skill -a claude-code -gnpx skills add adamriofc/indonesia-business-agent-skills --skill pph21-grossup-indonesia-business-agent-skill -a codex -ggemini skills install https://github.com/adamriofc/indonesia-business-agent-skills.git --path tax-id/skills/pph21-grossupgh skill install adamriofc/indonesia-business-agent-skills pph21-grossup-indonesia-business-agent-skillgit clone --depth 1 https://github.com/adamriofc/indonesia-business-agent-skills /tmp/adamriofc__indonesia-business-agent-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/adamriofc__indonesia-business-agent-skills/tax-id/skills/pph21-grossup ~/.claude/skills/pph21-grossup-indonesia-business-agent-skill # Claude Code
cp -R /tmp/adamriofc__indonesia-business-agent-skills/tax-id/skills/pph21-grossup ~/.agents/skills/pph21-grossup-indonesia-business-agent-skill # Codex, Cursor, Gemini CLI, Copilot, OpenCode