# ADR-0153: Guanghu channel navigation layer

## Status

Accepted for the macOS internal prototype.

## Context

HoloLake already provides a mature filesystem-backed knowledge workspace, media preview, Git surfaces, and AI workspace. Guanghu needs a system-level entry that can open complete application modules and human/persona channels without redefining the knowledge base as the whole product.

The Fifth Domain hierarchy also distinguishes logical ownership from physical server attachment. Cang Er's Pufferfish Language Subsystem is a Fifth Domain root system. Zhizhi can connect through a real independent server, but her Love Core Subsystem remains inside Ice Shuo's Eternal Lake Heart System.

## Decision

Add a navigation layer to the existing HoloLake home surface:

`Zero Core Channel → Fifth Domain → root human systems → internal subsystems and channels`.

The prototype uses transient renderer state and existing shadcn buttons. It does not introduce a new database, server credential, or persisted ownership model. Heartbeat Core opens existing modules, beginning with the Tolaria knowledge workspace and a visible Short Drama Video AI placeholder. Light Lake exposes persona-system routes. Love Core contains the See You Tomorrow channel.

## Consequences

- The knowledge base remains an application module and filesystem remains its authority.
- Logical system ownership is visible before real-server integration.
- Real server attachment can be added later without moving Zhizhi to the Fifth Domain root.
- The first prototype validates navigation and hierarchy; it does not yet install modules, connect remote servers, or execute persona operations.