The version control for AI builds

Git for AI.

AI writes code in seconds — then forgets the rules. Matrix Builder gives every AI coder a contract, not a prompt: locked standards, scoped tasks, validation, and an immutable history of every build.

Start building — it's free pip install agent-generator

Works with Claude Code · Cursor · Codex · GitPilot · and any AI coder.

Works with the AI coders you already use

Claude Code Codex Cursor GitPilot IBM Bob Any AI coder

The simplest way to understand it

Git changed how we write code.
Matrix changes how AI builds it.

$ mb — the Git

mbLocal. Offline. Yours.

A command-line tool that turns an idea into a controlled build and records every step — like git, but for what AI generates. No server, no account, fully deterministic.

Versioned prompts & immutable commits
Forbidden edits rejected — the contract holds
Replays identically on any machine

build.matrixhub.io — the GitHub

Matrix BuilderCloud. Shared. Publishable.

The home for your AI builds — like GitHub. Sign in, build in the browser, validate against the standard, keep a full timeline, and publish trusted bundles to the registry.

Cross-device build history & validation
Per-user, private by default
Publish signed bundles to MatrixHub

mb push → Matrix Builder

How it works

One idea. Four controlled steps.

No giant one-shot generation. Small, scoped batches your AI coder follows — and you verify.

Describe

An idea becomes a controlled blueprint with locked standards.

Contract

A scoped batch declares the exact files and acceptance commands.

Build

Hand the prompt to any AI coder. It stays inside the contract.

Validate

Pass → an immutable Matrix Commit. Fail → a scoped repair prompt.

mb — the Matrix build loop

# An idea becomes a controlled, versioned build
$ mb init "A GitHub repo intelligence agent" --quality standard
$ mb next "Add repo ingestion"
$ mb prompt --coder claude-code        # paste into your AI coder

# Validate what the AI changed — the contract is enforced
$ mb check backend/app/api/routes.py
MATRIX_STATUS: approved  score=100  ·  committed mc-454fa2735cd7

$ mb check MATRIX_BLUEPRINT.yaml         # an immutable contract file
MATRIX_STATUS: rejected  ·  RMD-002: forbidden contract file modified

See it in action

The web app, the same contract.

Build in the browser at build.matrixhub.io — choose an AI coder, get a contract-bound prompt, validate the result, keep the timeline.

build.matrixhub.io/matrix-builder

Matrix Builder build screen — build progress, AI-coder chooser, and a contract-bound prompt preview

Every build ships a signed, controlled bundle.

A blueprint, a locked standards file, scoped tasks, allowed-change boundaries, per-coder prompts, and signed provenance — not a pile of guessed code.

See what's inside →

Why it matters

Control you can trust.

Contract, not a prompt

Locked standards, allowed-file boundaries, and acceptance criteria — so AI coders become workers, not architects.

Versioned & immutable

Every accepted change is a Matrix Commit — prompt, diff, standards lock, and validation, pinned forever. A real history for AI work.

Every AI coder

One contract, native prompts for Claude Code, Cursor, Codex, GitPilot, IBM Bob, and more. Switch coders without losing control.

Built on a public, signed standard

The Ruslan Magana Definitions

Matrix Builder is governed by RMD — a versioned, cryptographically signed rule set that pins industry best practices (NIST SSDF, OWASP ASVS & LLM Top 10, SLSA) into the contract every build must follow. Open, auditable, and verifiable.

Read the standard →

Created & maintained by

Ruslan Magana Vsevolodovna

AI engineer and researcher, and author of the Ruslan Magana Definitions. Matrix Builder is his vision for safe, controlled, production-ready AI software — a contract layer that lets anyone build with AI coders without losing the rigor that real engineering demands.

🌐 ruslanmv.com ⌥ GitHub in LinkedIn

Open source