What is better-auth:setup?

An interactive setup guide for Better Auth, a TypeScript library for adding login and access control to applications.

Use it to configure Better Auth for databases such as PostgreSQL, MongoDB, MySQL, or SQLite; frameworks such as Next.js or Hono; OAuth providers; and features such as two-factor authentication, passkeys, magic links, organizations, or API keys.

It helps you select compatible database, framework, sign-in provider, and security settings before generating authentication configuration.

better-auth:setup — Command by secondsky

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add commands/secondsky/claude-skills/better-auth-setup

Clone the repo

git clone --depth 1 https://github.com/secondsky/claude-skills

Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,318 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00026	$0.01318
Opus 5	$0.00013	$0.00659
Sonnet 5	$0.00005	$0.00264
Haiku 4.5	$0.00003	$0.00132

Measured yesterday against content hash 4a1c6bf350b5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

better-auth:setup scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/better-auth/commands/better-auth-setup.md · 247 lines

How it starts

The opening of the file, as written. The whole thing — 247 lines — stays where its author put it; the contents beside it link to each section on GitHub.

better-auth Setup Wizard

This command walks through configuring better-auth for your project.

Step 1: Gather Requirements

Use the AskUserQuestion tool to collect configuration preferences:

Question 1: Database

Which database will you use?
- Cloudflare D1 (Recommended for Cloudflare)
- PostgreSQL (Drizzle)
- PostgreSQL (Prisma)
- MongoDB
- MySQL
- SQLite

Question 2: ORM (if applicable)

Which ORM do you prefer?
- Drizzle ORM (Recommended)
- Prisma
- Kysely
- None (Direct adapter)

Question 3: Framework

Which framework are you using?
- Cloudflare Workers + Hono
- Next.js (App Router)
- Next.js (Pages Router)
- Nuxt 3
- Remix
- SvelteKit
- Express
- Fastify
- Expo (React Native)

Question 4: OAuth Providers

Which OAuth providers do you need? (Select all that apply)
- Google
- GitHub
- Microsoft/Azure AD
- Apple
- Discord
- Twitter/X
- None (Email/password only)

Question 5: Plugins

Which features do you need? (Select all that apply)
- Two-Factor Authentication (2FA)
- Passkeys (WebAuthn)
- Magic Links
- Organizations (Multi-tenancy)
- API Keys
- Admin Dashboard
- None

Step 2: Generate Configuration

Based on answers, generate the appropriate files:

Core Files to Create

src/auth.ts (or lib/auth.ts)
- betterAuth configuration
- Database adapter
- Selected plugins
- OAuth providers
Database Schema
- For Drizzle: src/db/schema.ts
- For Prisma: prisma/schema.prisma
- For D1: Include in Drizzle schema
Auth Route
- Cloudflare: src/index.ts with Hono
- Next.js App: app/api/auth/[...all]/route.ts
- Next.js Pages: pages/api/auth/[...all].ts
- Nuxt: server/api/auth/[...all].ts
- Remix: app/routes/api.auth.$.tsx
- SvelteKit: src/routes/api/auth/[...all]/+server.ts
Client
- src/lib/auth-client.ts or framework equivalent
- Include selected client plugins
Environment Variables Template
- .env.example with all required variables

Read the full file on GitHub · 247 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 247 lines · 26 tokens per session scan A 4a1c6bf350b5

Subscribe to this mod's changes

better-auth:setup is a command published in the GitHub repository secondsky/claude-skills (212 stars, last pushed 2d ago), licensed MIT. It adds 26 tokens to every session and 1,318 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Frontend Security claude-code claude-code-commands claude-code-hooks claude-code-plugin claude-code-plugins claude-code-skill

better-auth:setup

Getting it into your agent

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

better-auth Setup Wizard

Step 1: Gather Requirements

Question 1: Database

Question 2: ORM (if applicable)

Question 3: Framework

Question 4: OAuth Providers

Question 5: Plugins

Step 2: Generate Configuration

Core Files to Create

What this file has done since we first saw it

Other commands, from other repositories

correlate

diff

open

search

stats

tag