About VB-OS

VB-OS (also written VBOS, Verification-Boundary Operating System) is deterministic execution authority infrastructure for systems operating under execution risk.

VB-OS was created by Asaad Riaz, Founder and CEO of MNC Labs, Inc., and is developed and maintained by MNC Labs.

What VB-OS Does

VB-OS answers one question at execution time: should this action proceed?

The answer is always binary: ASSERT (execution authorized) or DEFER (execution withheld). Every verdict is deterministic, reproducible, and replayable from immutable artifacts.

VB-OS is not merely a policy or rules engine, and it does not rely on probabilistic guardrails to determine its verdicts. It provides independent execution authority through deterministic verification boundaries, producing binary verdicts from structured evidence evaluated against compiled boundary versions.

Architecture

VB-OS separates orchestration from evaluation. The cloud platform orchestrates: managing boundaries, evidence, connectors, environments, and deployments. The evaluation engine is a standalone binary that accepts a boundary snapshot and evidence, produces a verdict, and exits. The engine is integer-only and model-independent, with deterministic observable outputs across supported deployment targets.

Every evaluation is replayable. When the required frozen inputs and evaluator artifacts are available and their identities verify, replay produces identical observable results. This is an architectural guarantee, not best-effort.

Verification Boundary Language

Boundaries are authored in VBL (Verification Boundary Language), a purpose-built language for declaring evidence requirements, prohibitions, predicates, provenance, and governance metadata. VBL compiles to a deterministic snapshot evaluated by the engine.

Documentation

This site covers the full VB-OS platform: core concepts, VBL reference, SDK integration (Python, Node.js, CLI), API reference, guides, templates, and troubleshooting.

What is VB-OS? for a complete technical introduction
5-Minute Quickstart to submit your first verification request
Execution Authority vs. Guardrails for how VB-OS differs from guardrail approaches
Execution Authority vs. Policy Engines for how VB-OS differs from policy engines
VBL Overview for the boundary language reference
API Reference for the REST API

Contact

For information about VB-OS, visit vb-os.org.