Implements OAuth 2.0/2.1 authorization flows in Fastify applications — configures authorization code with PKCE, client credentials, device flow, refresh token rotation, JWT validation, and token introspection/revocation endpoints.
Install
npx skills add mcollina/skills --skill oauthnpx skills add mcollina/skills --skill oauth -a claude-code -gnpx skills add mcollina/skills --skill oauth -a codex -ggemini skills install https://github.com/mcollina/skills.git --path skills/oauthgh skill install mcollina/skills oauthgit clone --depth 1 https://github.com/mcollina/skills /tmp/mcollina__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mcollina__skills/skills/oauth ~/.claude/skills/oauth # Claude Code
cp -R /tmp/mcollina__skills/skills/oauth ~/.agents/skills/oauth # Codex, Cursor, Gemini CLI, Copilot, OpenCode