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Better Auth Plugins

Community
bobmatnyc
better-auth-plugins

Better Auth plugin system for TypeScript. Use when adding advanced auth features (2FA, magic link, passkey, username, JWT, organizations) via server and client plugins.

Overview

Publisherbobmatnyc
Repositoryclaude-mpm-skills
Skill namebetter-auth-plugins
Stars
75
Forks
19
Bundled files
2
LicenseMIT
Links
Skill sourceRepository
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 2 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by bobmatnyc on GitHub. Read the source before you install it.

Installation

Install the Better Auth Plugins AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/bobmatnyc/claude-mpm-skills.git /tmp/claude-mpm-skills
mkdir -p .claude/skills
cp -r /tmp/claude-mpm-skills/toolchains/platforms/auth/better-auth/better-auth-plugins .claude/skills/better-auth-plugins
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Better Auth Plugins in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Better Auth Plugins on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Better Auth Plugins is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Better Auth Plugins

Goals

  • Add server plugins to extend auth features.
  • Add client plugins for matching client methods.
  • Apply schema changes when plugins add tables.

Quick start

  1. Import the plugin from better-auth/plugins and add it to plugins.
  2. Run migrations (generate or migrate) when required.
  3. Add the client plugin from better-auth/client/plugins.

Example: Two-factor authentication

ts
import { betterAuth } from "better-auth";
import { twoFactor } from "better-auth/plugins";

export const auth = betterAuth({
  plugins: [twoFactor()],
});
ts
import { createAuthClient } from "better-auth/client";
import { twoFactorClient } from "better-auth/client/plugins";

export const authClient = createAuthClient({
  plugins: [twoFactorClient({ twoFactorPage: "/two-factor" })],
});

Migration reminder

Run the CLI when a plugin adds tables:

bash
npx @better-auth/cli generate
bash
npx @better-auth/cli migrate

Guardrails

  • Add server and client plugins together to keep APIs aligned.
  • Keep nextCookies (if used) last in the server plugin list.
  • Review plugin docs for required schema and env variables.

References

  • toolchains/platforms/auth/better-auth/better-auth-plugins/references/plugins-index.md

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Better Auth Plugins AI skill do?

Better Auth plugin system for TypeScript. Use when adding advanced auth features (2FA, magic link, passkey, username, JWT, organizations) via server and client plugins.

Why use Better Auth Plugins on TypingMind?

Because you install it once and use it with any model. Better Auth Plugins is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Better Auth Plugins in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/bobmatnyc/claude-mpm-skills/tree/main/toolchains/platforms/auth/better-auth/better-auth-plugins. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Better Auth Plugins?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Better Auth Plugins?

As many as you like. As long as a model supports skills, you can use Better Auth Plugins with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Better Auth Plugins AI skill free?

Yes. It is published on GitHub by bobmatnyc under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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