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	8801
title	Implement generic async destruction handling via Promise Rejection
state	Closed
labels	aiarchitectureperformancecore
assignees	tobiu
createdAt	Jan 19, 2026, 10:29 AM
updatedAt	Jan 19, 2026, 11:17 AM
githubUrl	https://github.com/neomjs/neo/issues/8801
author	tobiu
commentsCount	1
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Jan 19, 2026, 11:17 AM

Implement generic async destruction handling via Promise Rejection

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

Closed v11.23.0 aiarchitectureperformancecore

tobiu commented on Jan 19, 2026, 10:29 AM

Currently, core.Base.timeout promises hang forever if the component is destroyed before completion, causing memory leaks (async closures never GC'd). Manual isDestroyed checks after awaits are brittle.

Plan:

Add Neo.DESTROYED constant.
Add global unhandledrejection handler to suppress Neo.DESTROYED errors.
Update core.Base:
- Track timeout reject functions.
- In destroy(), reject all pending timeouts with Neo.DESTROYED.
Remove manual guards from MagicMoveText as a verification step.

tobiu added the ai label on Jan 19, 2026, 10:30 AM

tobiu added the architecture label on Jan 19, 2026, 10:30 AM

tobiu added the performance label on Jan 19, 2026, 10:30 AM

tobiu added the core label on Jan 19, 2026, 10:30 AM

tobiu assigned to @tobiu on Jan 19, 2026, 10:30 AM

tobiu referenced in commit 07b6933 - "feat: Implement generic async destruction handling via Promise Rejection (#8801)" on Jan 19, 2026, 11:16 AM

tobiu closed this issue on Jan 19, 2026, 11:17 AM

tobiu Jan 19, 2026, 11:17 AM

Input from Gemini 3 Pro:

✦ I have implemented the generic async destruction handling and verified it with unit tests and by updating MagicMoveText.

Changes:

src/Neo.mjs: Added Neo.isDestroyed symbol and a global unhandledrejection handler to suppress errors rejected with this symbol.

src/core/Base.mjs:

Refactored #timeoutIds array to #timeouts Map (id -> reject).

Updated destroy() to reject all pending timeouts with Neo.isDestroyed.

Updated timeout() to register and deregister reject functions.

src/component/MagicMoveText.mjs:

Removed manual if (me.isDestroyed) return; checks after await me.timeout(...).

Updated the catch block to explicitly ignore Neo.isDestroyed rejections to prevent unwanted retries.

test/playwright/unit/core/BaseTimeout.spec.mjs: Added a comprehensive test suite to verify:

Timeout resolution.

Rejection on destruction.

Concurrent timeout handling.

Cleanup of completed timeouts.

Verification: The new test suite passed successfully, confirming that timeout() promises are now correctly rejected when an instance is destroyed, preventing memory leaks and zombie processes. The integration with MagicMoveText demonstrates the cleaner, guard-free usage pattern (for timeouts).

Next Steps: Other async methods like promiseUpdate and getDomRect currently do not auto-reject on destruction. This should be addressed in follow-up tasks to achieve full coverage.