Skill for integrating Better Auth - the comprehensive TypeScript authentication framework.
npxskills add aiskillstore/marketplace--skill better-auth-best-practicesLoading…
Always consult better-auth.com/docs for code examples and latest API.
npm install better-authBETTER_AUTH_SECRET and BETTER_AUTH_URLauth.ts with database + confignpx @better-auth/cli@latest migratenpx @better-auth/cli@latest generate --output src/db/auth-schema.ts then npx drizzle-kit push (dev) or (prod)npx drizzle-kit generate && npx drizzle-kit migratenpx @better-auth/cli@latest generate --output prisma/schema.prisma then npx prisma migrate devGET /api/auth/ok — should return { status: "ok" }BETTER_AUTH_SECRET - Encryption secret (min 32 chars). Generate: openssl rand -base64 32BETTER_AUTH_URL - Base URL (e.g., https://example.com)Only define baseURL/secret in config if env vars are NOT set.
CLI looks for auth.ts in: ./, ./lib, ./utils, or under ./src. Use --config for custom path.
npx @better-auth/cli@latest migrate - Apply schema (built-in adapter)npx @better-auth/cli@latest generate - Generate schema for Prisma/Drizzlenpx @better-auth/cli mcp --cursor - Add MCP to AI toolsRe-run after adding/changing plugins.
| Option | Notes |
|---|---|
appName | Optional display name |
baseURL | Only if BETTER_AUTH_URL not set |
basePath | Default /api/auth. Set / for root. |
secret | Only if BETTER_AUTH_SECRET not set |
database | Required for most features. See adapters docs. |
secondaryStorage | Redis/KV for sessions & rate limits |
emailAndPassword | { enabled: true } to activate |
socialProviders | { google: { clientId, clientSecret }, ... } |
plugins | Array of plugins |
trustedOrigins | CSRF whitelist |
Direct connections: Pass pg.Pool, mysql2 pool, better-sqlite3, or bun:sqlite instance. For Postgres, also supports postgres (postgres.js) and @neondatabase/serverless.
ORM adapters: Import from better-auth/adapters/drizzle, better-auth/adapters/prisma, better-auth/adapters/mongodb.
Drizzle provider values: "pg" (PostgreSQL), "mysql" (MySQL), "sqlite" (SQLite). Must match the driver used.
Critical: Better Auth uses adapter model names, NOT underlying table names. If Prisma model is User mapping to table users, use modelName: "user" (Prisma reference), not "users".
Storage priority:
secondaryStorage defined → sessions go there (not DB)session.storeSessionInDatabase: true to also persist to DBcookieCache → fully stateless modeCookie cache strategies:
compact (default) - Base64url + HMAC. Smallest.jwt - Standard JWT. Readable but signed.jwe - Encrypted. Maximum security.Key options: session.expiresIn (default 7 days), session.updateAge (refresh interval), session.cookieCache.maxAge, session.cookieCache.version (change to invalidate all sessions).
User: user.modelName, user.fields (column mapping), user.additionalFields, user.changeEmail.enabled (disabled by default), user.deleteUser.enabled (disabled by default).
Account: account.modelName, account.accountLinking.enabled, account.storeAccountCookie (for stateless OAuth).
Required for registration: email and name fields.
emailVerification.sendVerificationEmail - Must be defined for verification to workemailVerification.sendOnSignUp / sendOnSignIn - Auto-send triggersemailAndPassword.sendResetPassword - Password reset email handlerIn advanced:
useSecureCookies - Force HTTPS cookiesdisableCSRFCheck - ⚠️ Security riskdisableOriginCheck - ⚠️ Security riskcrossSubDomainCookies.enabled - Share cookies across subdomainsipAddress.ipAddressHeaders - Custom IP headers for proxiesdatabase.generateId - Custom ID generation or "serial"/"uuid"/falseRate limiting: rateLimit.enabled, rateLimit.window, rateLimit.max, rateLimit.storage ("memory" | "database" | "secondary-storage").
Endpoint hooks: hooks.before / hooks.after - Array of { matcher, handler }. Use createAuthMiddleware. Access ctx.path, ctx.context.returned (after), ctx.context.session.
Database hooks: databaseHooks.user.create.before/after, same for session, account. Useful for adding default values or post-creation actions.
Hook context (ctx.context): session, secret, authCookies, password.hash()/verify(), adapter, internalAdapter, generateId(), tables, baseURL.
Import from dedicated paths for tree-shaking:
import { twoFactor } from "better-auth/plugins/two-factor"
NOT from "better-auth/plugins".
Popular plugins: twoFactor, organization, passkey, magicLink, emailOtp, username, phoneNumber, admin, apiKey, bearer, jwt, multiSession, sso, oauthProvider, oidcProvider, openAPI, genericOAuth.
Client plugins go in createAuthClient({ plugins: [...] }).
Import from: better-auth/client (vanilla), better-auth/react, better-auth/vue, better-auth/svelte, better-auth/solid.
Key methods: signUp.email(), signIn.email(), signIn.social(), signOut(), useSession(), getSession(), revokeSession(), revokeSessions().
Infer types: typeof auth.$Infer.Session, typeof auth.$Infer.Session.user.
For separate client/server projects: createAuthClient<typeof auth>().
drizzleAdapter(db, ...) requires a db instance from drizzle(). See create-auth skill for setup examples (node-postgres, postgres.js, Neon).drizzle-kit commands require a drizzle.config.ts pointing to the generated schema file and DB credentials.
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in (single or multi-account), or reading/injecting/running secrets via op.
CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in (single or multi-account), or reading/injecting/running secrets via op.
CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).