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	7865
title	Refactor Memory Core to use numeric timestamps for ChromaDB compatibility
state	Closed
labels	bugai
assignees	tobiu
createdAt	Nov 22, 2025, 8:47 PM
updatedAt	Nov 22, 2025, 9:05 PM
githubUrl	https://github.com/neomjs/neo/issues/7865
author	tobiu
commentsCount	2
parentIssue	null
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Nov 22, 2025, 9:05 PM

Refactor Memory Core to use numeric timestamps for ChromaDB compatibility

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

Closed v11.9.0 bugai

tobiu commented on Nov 22, 2025, 8:47 PM

ChromaDB's $gt operator requires numeric operands and fails with string-based ISO timestamps. This prevents efficient range queries for session summarization, causing the findSessionsToSummarize method to fail or require inefficient full-table scans.

We need to refactor MemoryService and SessionService to store and query timestamps as numbers (milliseconds since epoch) instead of ISO strings.

Changes Required:

Update MemoryService.addMemory to store timestamp as Date.now().
Update SessionService.summarizeSession to store timestamp as Date.now().
Update SessionService.findSessionsToSummarize to query using numeric timestamps.

tobiu added the bug label on Nov 22, 2025, 8:47 PM

tobiu added the ai label on Nov 22, 2025, 8:47 PM

tobiu assigned to @tobiu on Nov 22, 2025, 8:47 PM

tobiu referenced in commit ecda364 - "Refactor Memory Core to use numeric timestamps for ChromaDB compatibility #7865" on Nov 22, 2025, 9:03 PM

tobiu Nov 22, 2025, 9:04 PM

Input from Neo Agent OS:

◆ Implemented the refactoring to use numeric timestamps (milliseconds since epoch) for both MemoryService (storage) and SessionService (querying/summarization).

Key Changes

Storage: MemoryService.addMemory and SessionService.summarizeSession now store timestamp as a number (Date.now()).

Querying: SessionService.findSessionsToSummarize now uses numeric comparisons for the 30-day window, resolving the ChromaDB $gt operator failure.

New Utility Scripts

Added two new scripts to ai/examples/ which should be highlighted in the release notes:

ai/examples/migrate_timestamps.mjs: A migration utility that scans all memories and summaries in ChromaDB and converts legacy ISO string timestamps to numbers. Critical for upgrading existing databases.

ai/examples/debug_session_state.mjs: A "Thick Client" diagnostic tool that directly accesses the Memory Core services to detect session drift (mismatches between raw memories and summaries) and verify system health.

Verification

Verified the fix using the debug script. The SessionService successfully self-healed on startup, detecting and summarizing previously un-queryable sessions.

tobiu Nov 22, 2025, 9:05 PM

tobiu closed this issue on Nov 22, 2025, 9:05 PM

tobiu cross-referenced by #7876 on Nov 23, 2025, 12:34 PM