Stabilize your AI-generated code
ContractSpec is the compiler that keeps AI-written software coherent, safe, and regenerable. You keep your app. You own the code. One module at a time.
Multi-Surface Sync
No Lock-in
Standard Tech
The Problem
In 2025, "vibe coding" and AI agents generate enormous amounts of code. But they have critical limitations that destroy long-term maintainability.
AI-generated code drifts from business rules over time. No source of truth means no safety.
API, DB, UI, and events get out of sync. One change breaks three surfaces.
AI "improvements" introduce subtle bugs and break contracts you didn’t know existed.
Teams ship fast initially, then spend months untangling AI-generated chaos.
The Solution
Define contracts once. Generate consistent code across all surfaces. Regenerate safely anytime. No lock-in.
Contracts define what the system should do, not just what it does. AI agents read specs, not implementations.
One spec generates API, DB, UI, events, and MCP tools. All surfaces stay in sync because they share the same source.
Regenerate code anytime without fear. Specs enforce invariants. Breaking changes caught at compile time.
Constrain what AI agents can change. Enforce contracts they must respect. Flag violations automatically.
We Get It
We know what you're thinking. Here's why those concerns don't apply to ContractSpec.
ContractSpec works with existing codebases. You don't start over — you stabilize incrementally, one module at a time. Start with one API endpoint, one data model, one contract.
You own the generated code. It's standard TypeScript, standard SQL, standard GraphQL. ContractSpec is a compiler — like TypeScript itself. You can eject anytime.
Specs are just TypeScript. If you can write z.object({ name: z.string() }), you can write a ContractSpec. No new language, no magic DSL, no YAML.
ContractSpec generates plain code you can read, debug, and modify. There's no proprietary runtime. Migrations are explicit, reversible, and in your control.
You keep your app.
We stabilize it, one module at a time.
You own the code. It's standard tech.
We're the compiler, not the prison.
Who It's For
Tier 1: Priority
Solo founders or small teams using Cursor, Copilot, Claude, or AI agents heavily. Messy AI-generated backends and frontends, inconsistent APIs, code that is hard to refactor.
Need: A way to stabilize AI-generated code without rewriting it.
Tier 1: Priority
2-10 person teams that shipped fast with AI and now have tech debt. Multiple surfaces out of sync, no source of truth, afraid to touch AI-generated code.
Need: Incremental stabilization, safe regeneration, contracts as guardrails.
Tier 2: Growth
Agencies building many projects for clients using AI-assisted development. Repeating the same patterns, inconsistent quality across projects, handoff nightmares.
Need: Reusable templates, consistent contracts, professional handoff artifacts.
Tier 2: Growth
Growing companies that need audit trails, API governance, or regulatory compliance. AI-generated code doesn't meet compliance requirements.
Need: Governance layer, change tracking, contract enforcement.
One contract, multiple outputs. All in sync. All standard tech.
Type-safe endpoints with validation. Standard Express/Hono/Elysia handlers.
Automatically generated resolvers. Standard Pothos/Apollo output.
Prisma migrations and types. Standard SQL underneath.
AI agent tool definitions. Works with Claude, GPT, and any MCP client.
Type-safe API clients. Standard fetch/axios underneath.
React forms and views from specs. Standard JSX output.
Start with one API endpoint, one entity, one surface. No big-bang migration.
Write a spec in TypeScript. Just types and Zod schemas you already know.
See what ContractSpec generates. Compare to your existing code. Keep what works.
Add more contracts as you see value. No pressure. No lock-in. Your pace.
Standard Tech Stack
TypeScript & Zod — schemas you already know
Prisma — standard database access
GraphQL or REST — your choice
React or any UI framework
Bun, Node, Deno — all supported
No Magic, No Lock-in
Generated code is readable & modifiable
No proprietary runtime dependencies
Eject anytime, keep everything
Works with your existing CI/CD
Open spec format
Ready to stabilize your codebase?
Start with one module. See the difference. Expand at your own pace.