Starts phase 2 of a Fetchproof project - checks the corpus arrived (handoff), confirms the gate passes, reads research/BRIEF.md, and builds only from what it verified, naming the E-## row behind every design decision and refusing to fill a gap with a guess.
Install
npx skills add StepenkoAnatoli/Fetchproof --skill build-from-briefnpx skills add StepenkoAnatoli/Fetchproof --skill build-from-brief -a claude-code -gnpx skills add StepenkoAnatoli/Fetchproof --skill build-from-brief -a codex -ggemini skills install https://github.com/StepenkoAnatoli/Fetchproof.git --path fetchproof/skills/build-from-briefgh skill install StepenkoAnatoli/Fetchproof build-from-briefgit clone --depth 1 https://github.com/StepenkoAnatoli/Fetchproof /tmp/StepenkoAnatoli__Fetchproof
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/StepenkoAnatoli__Fetchproof/fetchproof/skills/build-from-brief ~/.claude/skills/build-from-brief # Claude Code
cp -R /tmp/StepenkoAnatoli__Fetchproof/fetchproof/skills/build-from-brief ~/.agents/skills/build-from-brief # Codex, Cursor, Gemini CLI, Copilot, OpenCode