What is the 'Neural Link'?

The Neural Link is a bi-directional bridge that connects AI agents (like Gemini or Claude) directly to the Neo.mjs runtime. It allows agents to 'see' the application's Scene Graph, inspect component state, verify event listeners, and even mutate the running application in real-time. This turns the application into a 'glass box' for AI, enabling autonomous debugging and feature development.

Why is Neo.mjs called an 'Application Engine' instead of a framework?

Traditional frameworks are general-purpose libraries (like a Toyota) that help you organize code, but they compile away into ephemeral DOM nodes. Neo.mjs is a precision-engineered runtime (like an F1 car), similar to Unreal Engine for games. It maintains a persistent 'Scene Graph' of objects in a separate worker thread. These objects retain their identity, state, and relationships, allowing for advanced capabilities like multi-window orchestration, runtime permutation, and deep AI introspection that are impossible with 'melted plastic' DOM-based frameworks.

What is 'Context Engineering'?

Context Engineering is the practice of curating the environment and information flow for AI agents to maximize their autonomy. In Neo.mjs, this is implemented via three Model Context Protocol (MCP) servers: a Knowledge Base for semantic code understanding, a Memory Core for learning from past sessions, and a GitHub Workflow server for project management. This ecosystem allows agents to work as fully integrated members of the development team.

What is 'Object Permanence' in the context of Neo.mjs?

In Neo.mjs, UI components are persistent JavaScript objects living in the App Worker, not just transient rendering results. This 'Object Permanence' means a component (like a Dashboard) maintains its state (scroll position, user input, internal logic) even if it is detached from the DOM or moved to a different browser window. This is the 'Lego Technic' approach versus the 'Duplo' approach of traditional frameworks.

What is an 'Agent Operating System'?

Neo.mjs v11 introduced the concept of an Agent OS, where the platform itself provides the tools and interfaces for AI agents to operate. It combines a standalone, type-safe AI SDK for autonomous 'Code Execution' with the Neural Link for runtime control. This enables agents to monitor, debug, and heal the application autonomously, effectively acting as an operating system for synthetic intelligence.

How does Neo.mjs handle multi-window applications?

Neo.mjs uses shared web workers to run a single application instance across multiple browser windows. All windows share the same application state and data in real-time. Components can even move between windows while retaining their JavaScript instances. This enables desktop-class experiences like multi-window IDEs, browser-based email clients, and multi-screen control rooms.

What makes Neo.mjs different from React, Angular, or Vue?

Neo.mjs is fundamentally different in its architecture: (1) It uses True Multithreading via web workers to prevent UI jank, (2) It is an AI-Native Application Engine with built-in bridges for AI collaboration, and (3) It treats components as persistent objects in a Scene Graph, enabling native multi-window support and runtime permutation.

Frontmatter

id	9836
title	E2E: Fix Neural Link InteractionService Fixtures and Zod Validation
state	Closed
labels	bugaitesting
assignees	tobiu
createdAt	Apr 9, 2026, 10:27 PM
updatedAt	Apr 9, 2026, 10:28 PM
githubUrl	https://github.com/neomjs/neo/issues/9836
author	tobiu
commentsCount	1
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Apr 9, 2026, 10:28 PM

E2E: Fix Neural Link InteractionService Fixtures and Zod Validation

Name: Neo.mjs Application Engine
Author: Neo.mjs

Closedbugaitesting

tobiu commented on Apr 9, 2026, 10:27 PM

Description

The initial E2E tests for the Neural Link (ButtonBaseNL.spec.mjs) encountered failures when simulating user interactions and extracting DOM properties.

Root Causes

Zod Array Validation: OpenApiValidator.mjs forced all array validations for objects (type: 'array', items: { type: 'object' }) to strictly evaluate as z.array(z.string()). This caused simulateEvent to throw schema mismatch validation errors when sending Object[].
Missing Backend Imports: InteractionService was not properly imported/unwrapped in the test fixtures.
Event Target Instantiation: simulateEvent required appending __input to CheckBox targets because a synthetic click on a parent <label> does not natively toggle the <input type="checkbox"> state when fired programmatically.

Resolution

Fixed ai/mcp/validation/OpenApiValidator.mjs to correctly pass through z.any() objects for non-string array schemas.
Synchronized test/playwright/e2e/ButtonBaseNL.spec.mjs with the correct test payloads and targets.
Fixed properties unwrapping in test/playwright/fixtures.mjs.

tobiu added the bug label on Apr 9, 2026, 10:27 PM

tobiu added the ai label on Apr 9, 2026, 10:27 PM

tobiu added the testing label on Apr 9, 2026, 10:27 PM

tobiu referenced in commit 40ffd40 - "test: Fix Neural Link InteractionService Fixtures and Zod Validation (#9836)" on Apr 9, 2026, 10:28 PM

tobiu closed this issue on Apr 9, 2026, 10:28 PM

tobiu assigned to @tobiu on Apr 9, 2026, 10:28 PM

tobiu Apr 9, 2026, 10:28 PM

Input from Antigravity (Gemini 3.1 Pro):

✦ Resolved internally and verified with E2E fixture tests.

Re-mapped Zod generic array schemas to allow object sequences.

Updated ButtonBaseNL simulation E2E tests to cleanly verify Neural Link integration parameters and __input target elements for CheckBox models.