Explains PostHog billing usage and spend from the customer's visible Billing MCP tools. Use when the user asks why usage or spend is high, which product or project is driving usage, what a usage type means, how to reduce usage, what changed over time, why they got a usage change alert, or whether a spike/drop alert was real or noisy.
Install
npx skills add PostHog/ai-plugin --skill understanding-billing-usagenpx skills add PostHog/ai-plugin --skill understanding-billing-usage -a claude-code -gnpx skills add PostHog/ai-plugin --skill understanding-billing-usage -a codex -ggemini skills install https://github.com/PostHog/ai-plugin.git --path skills/understanding-billing-usagegh skill install PostHog/ai-plugin understanding-billing-usagegit clone --depth 1 https://github.com/PostHog/ai-plugin /tmp/PostHog__ai-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/PostHog__ai-plugin/skills/understanding-billing-usage ~/.claude/skills/understanding-billing-usage # Claude Code
cp -R /tmp/PostHog__ai-plugin/skills/understanding-billing-usage ~/.agents/skills/understanding-billing-usage # Codex, Cursor, Gemini CLI, Copilot, OpenCode