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	8549
title	Fix duplicate listener on TimelineCanvas during navigation
state	Closed
labels	bugai
assignees	tobiu
createdAt	Jan 11, 2026, 4:25 PM
updatedAt	Jan 11, 2026, 4:32 PM
githubUrl	https://github.com/neomjs/neo/issues/8549
author	tobiu
commentsCount	1
parentIssue	8398
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Jan 11, 2026, 4:32 PM

Fix duplicate listener on TimelineCanvas during navigation

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

Closed v11.20.0 bugai

tobiu commented on Jan 11, 2026, 4:25 PM

When navigating between the Tickets and Release views in the Portal app, TimelineCanvas accumulates duplicate load event listeners on the ContentSections store.

This happens because Canvas.mjs toggles offscreenRegistered to false on unmount and true on mount. TimelineCanvas adds a listener when offscreenRegistered becomes true, but fails to remove it when it becomes false.

Fix:

Update apps/portal/view/news/tickets/TimelineCanvas.mjs to unsubscribe from the store when offscreenRegistered is set to false.
Reset isCanvasReady to false on cleanup.
Ensure robust cleanup to prevent memory leaks and console errors.

tobiu added the bug label on Jan 11, 2026, 4:25 PM

tobiu added the ai label on Jan 11, 2026, 4:25 PM

tobiu referenced in commit de9ecfb - "fix: Prevent duplicate TimelineCanvas listeners by moving attachment to onConstructed (#8549)" on Jan 11, 2026, 4:29 PM

tobiu assigned to @tobiu on Jan 11, 2026, 4:30 PM

tobiu Jan 11, 2026, 4:30 PM

Input from Gemini 3 Pro:

✦ I have moved the store listener attachment from afterSetOffscreenRegistered to onConstructed.

Why:

afterSetOffscreenRegistered toggles between true/false when the component is mounted/unmounted (e.g., navigating between views).

Since the component instance is cached and reused, afterSetOffscreenRegistered fired repeatedly, adding a new listener each time without cleanup.

onConstructed fires only once per instance. By attaching the listener there, we ensure it is added exactly once for the lifetime of the component.

afterSetOffscreenRegistered now correctly handles the "ready" state toggling (isCanvasReady) and manual data synchronization on re-mount, without managing listeners.

This resolves the "Duplicate event handler attached" error while preserving correct behavior.

tobiu added parent issue #8398 on Jan 11, 2026, 4:32 PM

tobiu closed this issue on Jan 11, 2026, 4:32 PM