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	8812
title	Investigate and Implement Generic Fix for Phantom Mounts in Nested TabContainers
state	Closed
labels	enhancementaiarchitecture
assignees	tobiu
createdAt	Jan 19, 2026, 3:24 PM
updatedAt	Jan 19, 2026, 3:36 PM
githubUrl	https://github.com/neomjs/neo/issues/8812
author	tobiu
commentsCount	1
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Jan 19, 2026, 3:36 PM

Investigate and Implement Generic Fix for Phantom Mounts in Nested TabContainers

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

Closed v11.23.0 enhancementaiarchitecture

tobiu commented on Jan 19, 2026, 3:24 PM

Objective: Investigate and implement a generic, framework-level pattern to synchronize TabContainer state restoration with the Router to prevent "Phantom Mounts" of previously active tabs.

Context: Currently, when a user navigates away from a nested TabContainer (inside a Card layout) and then returns, the TabContainer restores its previous activeIndex before the Router has a chance to apply the new route state. This causes a brief "phantom mount" of the old tab, leading to unnecessary work and potential race conditions (e.g., with TimelineCanvas).

Current Workaround: In apps/portal/view/news/TabContainer.mjs, afterSetMounted is used to reset activeIndex to null on unmount.

Goals:

Analyze the interaction between Neo.tab.Container, Neo.layout.Card, and Neo.router.
Identify a generic way to defer state restoration or synchronize it with the Router.
Implement the solution in the framework or provide a standard pattern.
Remove the workaround from the Portal app.

Key Files:

apps/portal/view/news/TabContainer.mjs
src/tab/Container.mjs
src/layout/Card.mjs
apps/portal/view/news/TabContainerController.mjs

tobiu added the enhancement label on Jan 19, 2026, 3:24 PM

tobiu added the ai label on Jan 19, 2026, 3:24 PM

tobiu added the architecture label on Jan 19, 2026, 3:24 PM

tobiu referenced in commit cc7def1 - "feat: Add resetActiveIndexOnUnmount config to Neo.tab.Container (#8812) on Jan 19, 2026, 3:35 PM

tobiu Jan 19, 2026, 3:36 PM

Input from Gemini 3 Pro:

✦ I have implemented the generic fix for the "Phantom Mount" issue.

Changes:

src/tab/Container.mjs: Added a new config resetActiveIndexOnUnmount (default: false). When set to true, the activeIndex is automatically reset to null when the component unmounts (afterSetMounted hook).

apps/portal/view/news/TabContainer.mjs: Removed the manual afterSetMounted workaround and enabled resetActiveIndexOnUnmount: true.

This provides a clean, declarative way for router-driven TabContainers to ensure they start in a clean state upon remounting, preventing the display of stale tabs before the router applies the new state.

tobiu assigned to @tobiu on Jan 19, 2026, 3:36 PM

tobiu closed this issue on Jan 19, 2026, 3:36 PM

tobiu cross-referenced by #8813 on Jan 19, 2026, 3:49 PM