OAuth 2.0 and OpenID Connect protocol fundamentals including authorization code flow with PKCE, client credentials, refresh tokens, discovery documents, JWKS, and token introspection. Protocol-level troubleshooting and compliance.
Install
npx skills add DuendeSoftware/duende-skills --skill oauth-oidc-protocolsnpx skills add DuendeSoftware/duende-skills --skill oauth-oidc-protocols -a claude-code -gnpx skills add DuendeSoftware/duende-skills --skill oauth-oidc-protocols -a codex -ggemini skills install https://github.com/DuendeSoftware/duende-skills.git --path skills/oauth-oidc-protocolsgh skill install DuendeSoftware/duende-skills oauth-oidc-protocolsgit clone --depth 1 https://github.com/DuendeSoftware/duende-skills /tmp/DuendeSoftware__duende-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/DuendeSoftware__duende-skills/skills/oauth-oidc-protocols ~/.claude/skills/oauth-oidc-protocols # Claude Code
cp -R /tmp/DuendeSoftware__duende-skills/skills/oauth-oidc-protocols ~/.agents/skills/oauth-oidc-protocols # Codex, Cursor, Gemini CLI, Copilot, OpenCode