Superslate
Superslate is a paid SaaS boilerplate and starter kit positioned for the "agent era," built on production-grade TypeScript. It bundles the recurring infrastructure of a SaaS product — authentication, billing, organizations, uploads, transactional email and API contracts — so that a new project starts from a working, deployed application rather than a login form. The stack combines Bun, Hono, React 19, PostgreSQL, Better Auth and Resend, with billing exposed through a single contract supporting Polar, Stripe and Dodo. Authentication covers password and magic-link sign-in, optional Google provider, required email verification and session revocation on password reset. Organizations support personal and team scopes with invites, roles, transfers and queries scoped by organization_id. Beyond the scaffold, Superslate ships agent-oriented tooling: a root AGENTS.md contract, scoped per-directory context files, a maintained docs/golden-paths collection of change recipes (add-domain-end-to-end, add-billing-gated-feature, add-authenticated-route, add-database-migration, diagnose-failed-webhook, deploy-fresh-application and others), a packages/agent-eval harness for scoring diffs for boundary violations, and a read-only packages/agent-context with six tools and optional STDIO context for coding agents. The intended effect is that AI coding agents read current context, follow an established route and can verify changes before review.
- Category
- AI Agents
- Pricing
- Paid
Problem solved
AI coding agents tend to degrade a codebase gradually rather than in a single bad commit: they work from stale context files, invent their own route through the code when no standard one exists, and produce green checks that still precede regressions found weeks later. Superslate addresses this by supplying a maintained AGENTS.md contract, per-directory scoped rules, golden-path recipes for common changes, and evaluation tooling that scores agent diffs for boundary violations before they reach review.
Use cases
- Starting a new production SaaS product from an integrated TypeScript starter
- Giving coding agents a maintained repository map, scoped rules and boundaries
- Adding authentication, organizations and billing without building them from scratch
- Standardizing how features such as billing-gated routes or database migrations are added
- Evaluating and scoring AI agent diffs for architectural boundary violations
- Running a demo application that works immediately after cloning
- Onboarding a team onto documented golden paths for common changes
Audience
- Developers
- Startups
- Product Managers
Pros
- Includes auth, billing (Polar/Stripe/Dodo), teams and email wired end to end
- Agent-oriented guardrails: AGENTS.md, scoped context, golden paths and agent-eval
- Modern stack built on Bun, Hono, React 19 and PostgreSQL with Better Auth
- Documented recipes for common changes and failure diagnosis
- Application is runnable immediately after cloning rather than stubbed
Cons
- Paid product with lifetime access pricing; not a free or open-source template
- Opinionated stack limits flexibility if you prefer Next.js, Node or another ORM
- Value depends on using supported coding agents such as Claude Code, Codex or Cursor
- No public GitHub repository or star history available for inspection
- Adds its own conventions and tooling that a team must learn
Official website: https://superslate.dev/
Canonical LambdaBase page: https://www.lambdabase.com/tools/superslate