vibemanager.
Apply
THE METHOD

HARNESS ENGINEERING
is what makes AI reliable.

A discipline documented in 2025 by Martin Fowler, OpenAI, Red Hat, and Anthropic. VibeManager is the first consumer product built entirely on its principles.

DEFINITION

What harness engineering means.

Harness engineering is the practice of designing the structured environment, constraints, and feedback loops that wrap around AI coding agents — so they produce reliable, production-grade software instead of chaotic, unstructured output.

The discipline emerged because a fundamental problem appeared at scale: AI coding agents are powerful but undisciplined. Left to operate without a structured harness, they hallucinate requirements, drift from architectural decisions, and produce code that works in isolation but falls apart when integrated. The harness — the environment, the rules, the checkpoints, the artifact handoffs — is what makes AI agents reliable.

SOURCE
Martin Fowler

“Context files (AGENTS.md, CLAUDE.md) that ground agents in codebase rules.”

SOURCE
OpenAI

“Codex harness design — structured environment and feedback loops for coding agents.”

SOURCE
Red Hat Developer

“Structured workflows for AI-driven development at enterprise scale.”

SOURCE
Anthropic Engineering

“Harness design for long-running agent applications.”

THE GAP
0%
SUCCESS RATE · GENERAL-PURPOSE AI AGENTS · MULTI-STEP TASKS · UNHARNESSED

General-purpose AI agents achieve about 14% success on complex multi-step tasks without a structured harness. Humans, for reference, hit 78%. A proper harness inverts that number.

0%
WITH A HARNESS
THE METHOD

Five agents. Explicit handoffs. No context bleeding.

VibeManager runs a battle-tested approach to AI-driven development. Specialized agents work in strict sequence with defined roles and explicit handoffs:

VibeManager
Analyst
PM
Architect
Review
Dev
01
Analyst
Understands your idea. Identifies gaps. Asks only what's necessary.
02
Product Manager
Translates your idea into a complete product specification. Validates requirements. Surfaces ambiguities before they become bugs.
03
Architect
Designs the technical structure of your software. Documents every decision with reasoning. Ensures the foundation will hold what you're building.
04
Reviewer
Validates consistency across the product plan, architecture, and tasks before code runs. Nothing proceeds until everything aligns.
05
Developer
Builds the product task by task, each with isolated context — so every piece of code fits architecturally with every other piece, regardless of when it was written.

No agent sees more than it needs. No context bleeds between phases. Every artifact is validated before it advances.

CHECKPOINTS

Five gates. Nothing passes a broken gate.

T+00:01 · CLARIFY
Clarifying-question gate
Analyst cannot hand off to PM until user-confirmed answers exist for every ambiguity.
T+00:02 · PLAN
Product-plan approval gate
PM output locks only after user review and explicit approval.
T+00:03 · FOUNDATION
Foundation validation gate
Architect output is machine-checked for internal consistency with the approved product plan before advancing.
T+00:04 · READY
Readiness check gate
A dedicated Reviewer agent validates consistency across product plan, technical foundation, and task list before code generation begins.
T+00:05 · SEAL
Go-live secrets-scan gate
Generated code is scanned for plaintext credentials; one detected leak blocks the release.
THE MOAT

Every artifact lives in a graph.

Git tracks code. Jira tracks tickets. Notion tracks docs. No platform models the dependency relationships between artifact types — product plan → technical foundation → milestones → tasks → code — as a live graph.

VibeManager does. When a user changes one requirement in the product plan, every downstream artifact that depends on it is flagged automatically. Change propagates. Stale pieces light up. Rework is surgical, not wholesale.

This is a genuinely new data model for software development. It's our deepest technical moat.

  • Solid edge → direct dependency
  • Dashed edge → inferred dependency
  • Pulsing node → stale (needs review)
Product Plan
Technical Foundation
Milestones
Tasks
Your Code
THE PROMISE

The user never sees the harness. They see the result.

VibeManager takes the discipline that makes AI agents reliable for expert engineers and packages it as a consumer product for non-technical founders. The harness is invisible.

What's visible: a plain-language conversation, a readable product plan, a kanban board that moves, and a URL that works.

Apply the method to your idea.

Apply for betaSee how it works