authentication-logic
Guide to using Better Auth for client and server-side authentication.
Best use case
authentication-logic is best used when you need a repeatable AI agent workflow instead of a one-off prompt. It is especially useful for teams working in multi. Guide to using Better Auth for client and server-side authentication.
Guide to using Better Auth for client and server-side authentication.
Users should expect a more consistent workflow output, faster repeated execution, and less time spent rewriting prompts from scratch.
Practical example
Example input
Use the "authentication-logic" skill to help with this workflow task. Context: Guide to using Better Auth for client and server-side authentication.
Example output
A structured workflow result with clearer steps, more consistent formatting, and an output that is easier to reuse in the next run.
When to use this skill
- Use this skill when you want a reusable workflow rather than writing the same prompt again and again.
When not to use this skill
- Do not use this when you only need a one-off answer and do not need a reusable workflow.
- Do not use it if you cannot install or maintain the related files, repository context, or supporting tools.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/authentication-logic/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How authentication-logic Compares
| Feature / Agent | authentication-logic | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Guide to using Better Auth for client and server-side authentication.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# Authentication Logic
## Overview
We use **Better Auth** (`better-auth`) for identifying users.
## Config
- **Client**: `lib/auth-client.ts` exports `authClient`.
- **Server**: `lib/auth.ts` exports `auth`.
## Client-Side Usage
Use `authClient` for signing in, signing out, and checking session state in Client Components.
```tsx
import { authClient } from "@/lib/auth-client";
// Sign In
await authClient.signIn.email({
email,
password,
});
// Social Sign In
await authClient.signIn.social({
provider: "google",
callbackURL: "/onboarding",
});
// Sign Out
await authClient.signOut();
```
## Server-Side Usage
Use `auth.api.getSession` for protecting API routes or Server Actions.
```ts
import { auth } from "@/lib/auth";
import { headers } from "next/headers";
const session = await auth.api.getSession({
headers: await headers()
});
if (!session) {
return new Response("Unauthorized", { status: 401 });
}
```
## AuthBar Component
- Located at `textbook/src/components/AuthBar/index.tsx`.
- Displays user avatar or login button.
- Fetches session from `/api/auth/session` (Next.js API route proxying Better Auth).Related Skills
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