{
  "id": "3DARCH-FT-21",
  "type": "Feature",
  "title": "Exchange floor-scoped text conversation",
  "epic_id": "3DARCH-EP-5",
  "description": "Enable participants on the same floor to send and receive named, timestamped messages and see recent speech represented above the sender's avatar.",
  "user_problem": "Colocated participants need a quick written conversation channel that preserves the current floor context.",
  "expected_value": "Keeps lightweight written communication inside the participant’s immediate spatial context.",
  "scope": "Includes opening/collapsing chat, non-empty submission, floor-scoped relay, sender/time display, scrolling, and temporary avatar speech bubbles.",
  "exclusions": [
    "Direct messaging, persistence, history, recording, transcription, and cross-floor communication are excluded."
  ],
  "acceptance_outcomes": [
    "The chat panel can be opened, collapsed, composed in, and scrolled.",
    "A sent message is relayed only to the sender's current floor.",
    "Messages identify the sender and time.",
    "A temporary speech bubble and speaking/talking state connect the message to the in-world avatar.",
    "Changing floors cannot present previous-floor chat as current-floor conversation."
  ],
  "status": "IN_BACKLOG",
  "status_source": "EXACT",
  "blocked": false,
  "blocked_reason": null,
  "owner": "3D Architecture Wizzard team",
  "dependencies": [
    "3DARCH-FT-18",
    "3DARCH-FT-19"
  ],
  "risks": [
    "Chat is ephemeral and the legacy client can retain previous-floor messages after a floor change."
  ],
  "required_tasks": [],
  "approval": {
    "approved_for_solution": false,
    "approved_for_solution_by": null,
    "approved_for_solution_at": null,
    "conditions": [],
    "evidence_url": null,
    "approved_for_implementation": false,
    "approved_for_implementation_by": null,
    "approved_for_implementation_at": null,
    "implementation_conditions": [],
    "implementation_evidence_url": null
  },
  "catalogue_decision": {
    "decision": "Approved for documentation",
    "decided_by": "Linas",
    "decided_at": "2026-09-02T10:40:43.220Z",
    "evidence_url": "https://discord.com/channels/1518726359512387766/1543925247361814568/1544658325738885201",
    "conditions": [
      "Documentation approval does not grant Approved for Solution or implementation approval."
    ]
  },
  "sources": [
    {
      "label": "Discord – Scope – Linas: original Feature request",
      "url": "https://discord.com/channels/1518726359512387766/1543925247361814568/1544647879111483562"
    },
    {
      "label": "Discord – Scope – Linas: proceed with documented mapping",
      "url": "https://discord.com/channels/1518726359512387766/1543925247361814568/1544658325738885201"
    }
  ],
  "legacy_revision": "c0ced47ecaf4426f47e5c2e4868677f7144b951a",
  "legacy_evidence": [
    {
      "path": "apps/nebula/src/components/Chat/Chat.tsx",
      "url": "https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/nebula/src/components/Chat/Chat.tsx"
    },
    {
      "path": "apps/nebula/src/components/SpeechBubble.tsx",
      "url": "https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/nebula/src/components/SpeechBubble.tsx"
    },
    {
      "path": "apps/nebula/src/stores/chatStore.ts",
      "url": "https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/nebula/src/stores/chatStore.ts"
    },
    {
      "path": "apps/singularity/src/socket-server/chat-handler.ts",
      "url": "https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/src/socket-server/chat-handler.ts"
    }
  ],
  "architecture_traceability": {
    "requirements": [],
    "readiness": "Not started"
  },
  "release_evidence": [],
  "last_transition": {
    "event": "Catalogue registration",
    "from": null,
    "to": "IN_BACKLOG",
    "at": "2026-09-02T10:40:43.220Z",
    "actor": "Linas",
    "authority": "Human project team member",
    "reason": "The Feature catalogue was accepted for governed documentation and retained in the backlog.",
    "conditions": [
      "Registration records the accepted documentation boundary only.",
      "No solution or implementation approval is granted."
    ],
    "evidence_url": "https://discord.com/channels/1518726359512387766/1543925247361814568/1544658325738885201"
  }
}