Build or check a surface that is meant to appear once and then stop, such as a coach mark, tooltip, tour, primer, upsell card or review ask. Covers the three questions that decide whether it works for real people, not just on your phone, plus the traps that silently take it to zero.
Install
npx skills add namedtoaster/The-Last-Mile --skill one-time-surfacenpx skills add namedtoaster/The-Last-Mile --skill one-time-surface -a claude-code -gnpx skills add namedtoaster/The-Last-Mile --skill one-time-surface -a codex -ggemini skills install https://github.com/namedtoaster/The-Last-Mile.git --path skills/one-time-surfacegh skill install namedtoaster/The-Last-Mile one-time-surfacegit clone --depth 1 https://github.com/namedtoaster/The-Last-Mile /tmp/namedtoaster__The-Last-Mile
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/namedtoaster__The-Last-Mile/skills/one-time-surface ~/.claude/skills/one-time-surface # Claude Code
cp -R /tmp/namedtoaster__The-Last-Mile/skills/one-time-surface ~/.agents/skills/one-time-surface # Codex, Cursor, Gemini CLI, Copilot, OpenCode