Add authentication to the current Convex + web app — passkeys by default (OAuth/password optional), wired end to end incl. the auth.config.ts that's the #1 auth footgun. TRIGGER when the user wants login / sign-in / accounts / passkeys / OAuth for an existing app.
Install
npx skills add convex/convex-backend-skill --skill authnpx skills add convex/convex-backend-skill --skill auth -a claude-code -gnpx skills add convex/convex-backend-skill --skill auth -a codex -ggemini skills install https://github.com/convex/convex-backend-skill.git --path skills/authgh skill install convex/convex-backend-skill authgit clone --depth 1 https://github.com/convex/convex-backend-skill /tmp/convex__convex-backend-skill
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/convex__convex-backend-skill/skills/auth ~/.claude/skills/auth # Claude Code
cp -R /tmp/convex__convex-backend-skill/skills/auth ~/.agents/skills/auth # Codex, Cursor, Gemini CLI, Copilot, OpenCode