ARC // Spec-as-source for AWS Backends

The spec is the product.
Start building yours.

Spec-as-source for AWS backends. Start with ARCitect, ship with Code Reactor.

Join the ARCitect beta → See how it works

System Architecture — Source Pipeline

Natural Language

Intent + constraints

input

ARCitect

AI-native spec editor

Beta — Open

validates

OpenAPI Spec

Source of truth

generates

Code Reactor

Deterministic generator

Pilot Validated

deploys

AWS System

Handlers · Infra · Tests

ARCitect — Beta Open Code Reactor — Pilot Validated Deterministic system from spec

01 Natural Language Intent + constraints
02 ARCitect Beta — Open
03 OpenAPI Spec Source of truth
04 Code Reactor Pilot Validated
05 AWS System Handlers · Infra · Tests

What ARC Does

Move Fast.
Break nothing.

One spec. Every handler, validator, test suite, infrastructure definition (IaC) and configuration derived from it — regenerated the moment it changes.
As soon as you have a spec, you are ready to ship.

Three pillars OpenAPI → Production

Design in the spec,
not in the code.

ARCitect — Spec Author

ARCitect turns natural-language intent into validated OpenAPI, catches inconsistencies before they become bugs, and keeps your data model, contract, and code modules consistent with each other.

AI-native authoring

Generate systems,
not scaffolds.

ARC Code Reactor — Generator

ARC Code Reactor produces complete AWS backends from validated specs in a single deterministic pass — handlers, data access, IAM, CI/CD, contract tests, documentation. No iteration loops. No agent thrash.

Deterministic generation

Ship the spec,
not the code.

ARC Pipeline — Deploy

When features change, you edit the spec. The pipeline regenerates every downstream artifact and opens a pull request with the diff. You review what you designed, not ten thousand lines of glue.

Zero-drift deploys

The Problem

Your spec says one thing.
Your code does another.

Every team that has tried to manually keep an OpenAPI spec in sync with backend source code knows how this ends. The spec is a planning document for week one and a misleading artifact by week six. Contract tests get skipped. Fields get added directly to handlers. Consumers find out from an app crash. You find out from alarms, bad reviews or churned customers.

AI coding agents can make drift worse, not better — plausible code and spec-conformant code are not the same thing.

Read the full argument →

Drift — Week-by-week 3 DIVERGENCES

Week 01 — Spec written

POST /users → 201 { id, email, role }

GET /users/{id} → 200 { id, email, role }

Week 06 — Code in production

POST /users → 200 { userId, email }

GET /users/{id} → 200 { id, email, role,

createdAt, orgId }

// status wrong · field renamed · 2 added

The core failure mode

When the spec and the code are two separate artifacts manually maintained by the same team, one of them is usually wrong.
Spec drift is the gap between what your spec says your API does and what your code actually does. The gap starts small, grows invisibly, and gets discovered the worst possible way.

In Action

Spec Drift In Action

See how spec drift impacts a project over time.

00 — Project Timeline

Project Starts

Valid

Every artifact derives from the spec. Requirements, code, tests, and docs are all aligned. Engineers ship with full confidence. This is what healthy looks like.

01 — Artifact Pipeline

Result

Valid deployment — all checks passed, pipeline runs clean

02 — Metrics

Dev velocity

100%

Hrs lost / wk

Support tickets

SLA breaches

03 — Blast Radius

1 / 5

How it Works

One spec. One system.
One shot.

Three stages, one source of truth.

01 — Author

Write your spec in ARCitect.

An AI-native editor that turns natural language into validated, production-grade OpenAPI. You describe intent; ARCitect enforces correctness.

AI-native · Validation-first

02 — Generate

Code Reactor builds a complete AWS backend.

A single deterministic pass from spec to system. Handlers, infra, tests, docs — no iteration loops. No agent thrash.

Single-pass · Deterministic

03 — Ship

Deploy to AWS. Regen on spec change.

The generated system deploys to your AWS account. When the spec changes, the system regenerates. The code is a build output.

AWS-native · Spec-locked

Single-shot deterministic generation from spec.

Maximize value by minimizing the number of agentic code changes, developer code reviews and amount of tech debt needed to ship each feature.

ARC takes a proprietary approach to code generation. Most code generation tools wrap an LLM in a loop and call it an agent. ARC generates the complete system in one deterministic pass from a validated spec — output is always spec-conformant because conformance is enforced structurally, not hoped for.

Spec Driven Benefits

Build better with blueprints.

Spec-as-source isn't a documentation strategy. It's an architectural decision that reshapes how your team designs, builds, and ships APIs.

Without ARC

— Spec written once, never updated — drifts within a sprint
— Integration bugs discovered in staging or production
— Breaking changes ship without anyone knowing
— Frontend blocks on backend for every new endpoint
— AI generates code with inconsistent contracts across handlers
— Manual CDK wiring for every route, Lambda, and table

With ARC

→ Spec is the code — edit the spec, everything regenerates
→ Contract tests catch mismatches before code is merged
→ Backward compatibility enforced automatically in CI
→ Mock servers spin up instantly from the spec for any consumer
→ AI generates specs within your organizational constraints
→ CDK infrastructure derived — add an endpoint, infra follows

Proof

Results from the pilot.

Case Study No. 01

ARC Pilot #1 — 85% generated on day one.

A production-ready, multi-tenant TCPA-compliant SMS platform. Five micro-services, 663 AWS resources, generated from a validated OpenAPI spec.

Developed in a single sprint.

Code generation

Auth service 96.0%

Admin service 90.7%

Messaging service 94.1%

Core service 83.9%

Test coverage

Unit tests 95.3%

Contract tests 94.1%

Functional tests 77.5%

Google commendable threshold 75%+

Limited Beta

Start writing specs
that ship systems.

ARCitect is open to a limited beta cohort. We're prioritizing teams that own real APIs on AWS and founders building production-grade prototypes.

What you get

Early access to ARCitect and the full spec-as-source pipeline
First access to Code Reactor self-serve when it opens
Discounted GA pricing locked in at beta rates