better-auth-plugin

Explicit-only installer for the Sigma Auth Siggy Codex custom agent. Use ONLY when the user explicitly asks to install, update, check, uninstall, or set up the Sigma Auth or Siggy Codex agent, including "install Siggy in Codex", "update the Sigma Auth Codex agent", or "check sigma_auth_guide". Never auto-invoke for ordinary OAuth, authentication, Better Auth, BAP, wallet, session, passkey, or security requests.

This skill should be used when the user asks to "implement device auth", "add device authorization", "authenticate desktop app", "authenticate CLI tool", "device code flow", "RFC 8628", "poll for token", "get user info after device auth", or mentions authenticating apps that can't handle browser redirects. Provides step-by-step guidance for device authorization with Sigma Identity.

Setup Sigma Auth OAuth integration in a Next.js application. Guides through installing @sigma-auth/better-auth-plugin, configuring environment variables, creating auth client, implementing sign-in flow, and setting up API routes for token exchange with Bitcoin-native authentication.

Diagnose and troubleshoot bitcoin-auth token generation and verification issues. This skill should be used when users encounter authentication failures, signature verification errors, or integration problems with the bitcoin-auth library.

Setup Sigma Auth OAuth integration in a Convex application. Guides through installing @sigma-auth/better-auth-plugin, configuring Convex environment variables, and setting up the auth server.

This skill should be used when the user asks about "TokenPass", "install TokenPass", "run TokenPass server", "TokenPass desktop app", "TokenPass API", "personal identity server", "be your own OAuth provider", or needs help setting up, configuring, or integrating TokenPass Server or Desktop applications. Provides installation, configuration, and API integration guidance.