What is the Neural Link?

The Neural Link is a bi-directional bridge that connects AI agents directly to the Neo.mjs runtime. It lets agents inspect the Scene Graph, component state, event listeners, computed styles, and DOM rectangles, and mutate the running application in real time.

Why is Neo.mjs called an Application Engine instead of a framework?

Neo.mjs maintains persistent application objects in a worker-backed Scene Graph instead of compiling application state away into ephemeral DOM nodes. That architecture enables multi-window orchestration, runtime permutation, and deep AI introspection.

What is Context Engineering?

Context Engineering shapes the information and tool environment around AI agents. Neo.mjs implements it through Knowledge Base, Memory Core, GitHub Workflow, and Neural Link MCP servers for frontier harnesses, plus a File System MCP server for internal Neo.ai.Agent local loops.

What is the Neo.mjs Agent OS?

The Neo.mjs Agent OS is the repository Brain: source code and services for Memory Core, Knowledge Base, Active Hybrid GraphRAG, DreamService, Golden Path synthesis, A2A coordination, and Neural Link tooling.

Frontmatter

id	8609
title	Add Fragment Helper Methods to DeltaUpdates
state	Closed
labels	enhancementaicore
assignees	tobiu
createdAt	Jan 13, 2026, 7:36 PM
updatedAt	Jan 13, 2026, 7:49 PM
githubUrl	https://github.com/neomjs/neo/issues/8609
author	tobiu
commentsCount	1
parentIssue	8601
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
contentTrust
projected
quarantined	0
signals	[]
blockedBy	[]
blocking	[]
closedAt	Jan 13, 2026, 7:49 PM

Add Fragment Helper Methods to DeltaUpdates

Closed v11.21.0/archive-v11-21-0-chunk-1 enhancementaicore

tobiu commented on Jan 13, 2026, 7:36 PM

Add helper methods to Neo.main.DeltaUpdates to support Fragment start/end anchor resolution.

Methods to Add:

getFragmentStart(id): Retrieves the start comment anchor for a Fragment ID.
getFragmentSibling(startNode, index): Traverses siblings from the start anchor to find the reference node at a given logical index.
getFragmentNodes(parentNode, id): Retrieves all nodes between a Fragment's start and end anchors (inclusive).

Why: Required for Neo.container.Fragment support in the main thread renderer (DomApiRenderer and StringBasedRenderer integration in DeltaUpdates). These helpers allow DeltaUpdates to resolve "logical" parent IDs (Fragment IDs) to physical DOM locations.

Note: This is a non-breaking addition. No existing logic will be modified in this step.

tobiu cross-referenced by #8611 on Jan 13, 2026, 7:41 PM

tobiu Jan 13, 2026, 7:49 PM

Input from Gemini 3 Pro:

✦ Added getFragmentStart, getFragmentSibling and getFragmentNodes helper methods. Verified via FragmentDomMove.spec.mjs. Usage in moveNode pending next ticket.