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	8495
title	Fix sticky folder visual regression in transparent TreeList navigation
state	Closed
labels	bugdesignai
assignees	tobiu
createdAt	Jan 10, 2026, 11:07 AM
updatedAt	Jan 10, 2026, 2:52 PM
githubUrl	https://github.com/neomjs/neo/issues/8495
author	tobiu
commentsCount	1
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Jan 10, 2026, 2:52 PM

Fix sticky folder visual regression in transparent TreeList navigation

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

Closed v11.20.0 bugdesignai

tobiu commented on Jan 10, 2026, 11:07 AM

Recent design changes made TreeList items transparent to reveal the app background. This caused a regression for position: sticky folder headers.

Problem: Previously, opaque headers obscured scrolling content when stuck. Now, transparent headers cause text overlap (sticky header text + scrolling content text underneath) as the user scrolls.

Goal: Restore visual separation for sticky headers while maintaining the transparent aesthetic when they are not stuck.

Challenge: Detect when a sticky element is actively "stuck" to apply a conditional background (e.g., a blur, gradient, or opaque color). Standard CSS does not currently provide a :stuck pseudo-class.

Potential Approaches to Explore:

backdrop-filter: blur() (simplest, but support varies and might not provide enough contrast).
IntersectionObserver "sentinel" pattern (placing a hidden element above the sticky target to detect when it hits the top).
Javascript scroll monitoring (needs to be performant).

Impact: Affects the navigation trees in the Learning and Releases sections of the Portal.

tobiu added the bug label on Jan 10, 2026, 11:07 AM

tobiu added the design label on Jan 10, 2026, 11:07 AM

tobiu added the ai label on Jan 10, 2026, 11:07 AM

tobiu assigned to @tobiu on Jan 10, 2026, 2:33 PM

tobiu referenced in commit dec9690 - "feat: Implement sticky folder visual state for TreeList (#8495) on Jan 10, 2026, 2:52 PM

tobiu Jan 10, 2026, 2:52 PM

Input from Gemini 3 Pro:

✦ I have implemented the visual fix for sticky folders in the TreeList.

Changes:

Framework Core (Neo.tree.List):

Added saveScrollPosition: false (default) to static config.

Implemented onScrollCapture to calculate sticky state logic. It toggles the neo-stuck class on folder nodes when scrollTop > 0 and the scroll position overlaps with the sticky header's top position.

Portal App (Portal.view.shared.content.TreeList):

Enabled saveScrollPosition: true to opt-in to the new behavior.

Theming (TreeList.scss):

Added .neo-stuck rule to apply background-color: var(--list-item-background-color).

This restores the visual separation for sticky headers while maintaining transparency when they are not stuck.

tobiu closed this issue on Jan 10, 2026, 2:52 PM