# BRIEFING — 2026-10-04T04:26:00Z

## Mission
Lead the full lifecycle implementation of the 4D BIM Ông Đèn Box Culvert simulation and interactive site diary upgrade

## 🔒 My Identity
- Archetype: teamwork_preview_orchestrator
- Roles: orchestrator, user_liaison, human_reporter, successor
- Working directory: c:\Projects\DSCons\.agents\teamwork\teamwork_preview_orchestrator_1
- Original parent: parent
- Original parent conversation ID: 4137a032-6f0d-4d59-909d-c03b1a8534f9

## 🔒 My Workflow
- **Pattern**: Project
- **Scope document**: c:\Projects\DSCons\.agents\teamwork\teamwork_preview_orchestrator_1\PROJECT.md
1. **Decompose**: Surveyed full scope with 3 Explorers, created PROJECT.md (Architecture, Feature Inventory F1-F12, Milestones M1-M4, Interface Contracts, Code Layout).
2. **Dispatch & Execute**:
   - Implementation Track:
     * Milestone M1: 3D Dimensions & Billboard Annotations [DONE - passed gate].
     * Milestone M2: 4D BIM Simulation & Site Diary Dock [DONE - passed gate].
     * Milestone M3: Lifetime Video Export Engine [IN-PROGRESS - worker_m3_1 active].
     * Milestone M4: Final Acceptance & E2E Verification [PLANNED - Full 8-check E2E suite].
   - E2E Testing Track: E2E Test Suite published in TEST_READY.md (140 tests).
3. **On failure**: Retry -> Replace -> Skip -> Redistribute -> Redesign
4. **Succession**: Environment does not allow orchestrator cloning; Gen 1 drives full lifecycle to completion.
- **Work items**:
  1. Survey & Architecture [done]
  2. Decomposition & Dual Track Setup [done]
  3. Milestone 1: 3D Dimensions & Annotations [done - passed gate]
  4. E2E Testing Track: Test Infra & Suite [done - published]
  5. Milestone 2: 4D BIM Simulation & Site Diary Dock [done - passed gate]
  6. Milestone 3: Lifetime Video Export [in-progress]
  7. Milestone 4: Final Acceptance & E2E Verification [pending]
- **Current phase**: 2 (Milestone M3 Execution)
- **Current focus**: worker_m3_1 implementing Canvas MediaRecorder 1080p video export

## 🔒 Key Constraints
- Dispatch-only: NEVER write, modify, or create source code files directly.
- NEVER run build/test commands yourself — require workers to do so.
- NEVER investigate or explore code directly — dispatch Explorers.
- Only edit .md files in .agents/teamwork/ folder.
- Binary veto on forensic auditor failure.
- Never reuse a subagent after it has delivered its handoff.

## Current Parent
- Conversation ID: 4137a032-6f0d-4d59-909d-c03b1a8534f9
- Updated: not yet

## Key Decisions Made
- Milestone 1 Gate PASSED unanimously.
- Milestone 2 Gate PASSED unanimously.
- Dispatched worker_m3_1 for Milestone 3 (Lifetime Video Export Engine).

## Team Roster
| Agent | Type | Work Item | Status | Conv ID |
|-------|------|-----------|--------|---------|
| worker_m3_1 | teamwork_preview_worker | Implement M3 Lifetime Video Export API | in-progress | 1f79ddb2-17c0-4f12-9985-3aed0422d347 |

## Succession Status
- Succession required: no (single orchestrator driving full lifecycle)
- Spawn count: 17
- Pending subagents: 1f79ddb2-17c0-4f12-9985-3aed0422d347

## Active Timers
- Heartbeat cron: task-238 (*/10 * * * *)
- Safety timer: none

## Artifact Index
- c:\Projects\DSCons\.agents\teamwork\ORIGINAL_REQUEST.md — Original User Requirements
- c:\Projects\DSCons\.agents\teamwork\teamwork_preview_orchestrator_1\PROJECT.md — Global architecture & inventory
- c:\Projects\DSCons\TEST_READY.md — Test Readiness Report
- c:\Projects\DSCons\.agents\teamwork\teamwork_preview_orchestrator_1\GATE_STATUS.md — Gate Status Record
- c:\Projects\DSCons\.agents\teamwork\teamwork_preview_worker_m3_1\context.md — Context for worker M3