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---
title: "3DARCH-EP-4 — Experience Live Co-Presence"
description: "Use this approved Epic boundary to assess related Features and outcomes."
---
# Experience Live Co-Presence
| Epic | Delivery status | Status source | Owner | Approved for Solution |
|---|---|---|---|---|
| `3DARCH-EP-4` | `IN_BACKLOG` | `EXACT` | 3D Architecture Wizzard team | No |
## Goal
Synchronize scene-aware position, orientation, avatar, identity, and movement or activity state for people sharing a floor.
## Benefit
Participants experience a consistent sense of being together as colleagues join, move, change floors, or leave.
## Problem or opportunity
A shared virtual workplace is not credible unless participants can recognize who is present and see their movement and activity coherently.
## Constraints
- Only materially implemented legacy behavior is included; planned-only capabilities remain outside the approved catalogue.
## Features
No child Features have been defined or approved. Feature discovery must preserve this Epic boundary and requires a separate human **Approved for Solution** decision before Architecture solution work begins.
## Original source
- [Legacy-analysis request — RootAtSkic](https://discord.com/channels/1518726359512387766/1543925247361814568/1544617403160465409)
- [Catalogue documentation approval — Linas](https://discord.com/channels/1518726359512387766/1543925247361814568/1544641572975673394)
### Legacy implementation evidence
The approved catalogue was mined from legacy revision `c0ced47ecaf4426f47e5c2e4868677f7144b951a`.
- [`apps/singularity/src/socket-server/event-handlers.ts`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/src/socket-server/event-handlers.ts)
- [`apps/singularity/src/socket-server/scene-manager.ts`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/src/socket-server/scene-manager.ts)
- [`apps/singularity/src/socket-server/broadcast-service.ts`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/src/socket-server/broadcast-service.ts)
- [`apps/nebula/src/socket-client.ts`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/nebula/src/socket-client.ts)
- [`apps/nebula/src/components/Player.tsx`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/nebula/src/components/Player.tsx)
- [`packages/utils/types/src/player.types.ts`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/packages/utils/types/src/player.types.ts)