diff --git a/ligbox-ops-platform/_sidebar.md b/ligbox-ops-platform/_sidebar.md
index ef5ab38..f0206f8 100644
--- a/ligbox-ops-platform/_sidebar.md
+++ b/ligbox-ops-platform/_sidebar.md
@@ -212,3 +212,10 @@
     - [activation-field-mapping.md](specs/043-desk-client-activation-sync/contracts/activation-field-mapping.md) — **fonte única**
     - [desk-activate-account-api.md](specs/043-desk-client-activation-sync/contracts/desk-activate-account-api.md)
     - [mail-bundle-api.md](specs/043-desk-client-activation-sync/contracts/mail-bundle-api.md)
+- **044-foss-desk-ticket-sync** ⭐ Portal OB- ↔ Desk ↔ FOSS Support
+  - [📄 spec.md](specs/044-foss-desk-ticket-sync/spec.md)
+  - [tasks.md](specs/044-foss-desk-ticket-sync/tasks.md)
+  - [ROLLBACK.md](specs/044-foss-desk-ticket-sync/ROLLBACK.md)
+  - **contracts/**
+    - [ticket-field-mapping.md](specs/044-foss-desk-ticket-sync/contracts/ticket-field-mapping.md) — **fonte única IDs**
+    - [ticket-sync-api.md](specs/044-foss-desk-ticket-sync/contracts/ticket-sync-api.md)
diff --git a/ligbox-ops-platform/specs/010-desk-assist-takeover/spec.md b/ligbox-ops-platform/specs/010-desk-assist-takeover/spec.md
index 38f92f9..1d69fd8 100644
--- a/ligbox-ops-platform/specs/010-desk-assist-takeover/spec.md
+++ b/ligbox-ops-platform/specs/010-desk-assist-takeover/spec.md
@@ -5,7 +5,7 @@
 **Status:** 📋 **Draft — decisões fechadas, pronta para plano**  
 **Prioridade:** **P0** (bloqueia operação humana no onboarding)  
 **Depende de:** Spec 001 (webhooks VM112), Spec 003 (auth/RBAC)  
-**Relacionada:** Spec 007 (push escalada), Spec 008 (Kanban/SLA), Spec 011 (OTRS futuro)  
+**Relacionada:** Spec 007 (push escalada), Spec 008 (Kanban/SLA), Spec 011 (OTRS futuro), **[Spec 044](../044-foss-desk-ticket-sync/spec.md)** (sync FOSS)  
 **API alvo:** `0.9.0-desk-assist` (VM122) + contratos VM112 `assist-v1`
 
 ---
diff --git a/ligbox-ops-platform/specs/024-openpanel-fossbilling/spec.md b/ligbox-ops-platform/specs/024-openpanel-fossbilling/spec.md
index deec132..2d0b95a 100644
--- a/ligbox-ops-platform/specs/024-openpanel-fossbilling/spec.md
+++ b/ligbox-ops-platform/specs/024-openpanel-fossbilling/spec.md
@@ -134,7 +134,7 @@ bash /opt/ligbox-ops-platform/deploy/vm123-finance-stack/setup-foss-antispam.sh
          FOSSBilling Server Manager
          (criar/suspender contas hosting)
 
-Desk VM122 ──webhook/link──► FOSSBilling / tickets
+Desk VM122 ──webhook/link──► FOSSBilling / tickets · **[Spec 044](../044-foss-desk-ticket-sync/spec.md)** sync bidireccional
 Wizard VM112 ──company.validated──► Desk
 ```
 
diff --git a/ligbox-ops-platform/specs/041-desk-operational-feed/spec.md b/ligbox-ops-platform/specs/041-desk-operational-feed/spec.md
new file mode 100644
index 0000000..18fde4f
--- /dev/null
+++ b/ligbox-ops-platform/specs/041-desk-operational-feed/spec.md
@@ -0,0 +1,203 @@
+# Spec 041 — Central Operacional (Operational Feed)
+
+**Criado:** 2026-06-29  
+**Solicitado por:** Roger  
+**Status:** Implementado v0.13.0 — **fase mock/simulação**  
+**Prioridade:** P1 (integrações reais = fases futuras)  
+**Versão Desk:** `0.13.0-design-system`  
+**Substitui:** Aba Desk **`Mensagens`** (`data-view="messages"`)  
+**UI label:** **Central Operacional** (vocabulário: *Operational feed* — nunca «Mensagens»)  
+**Spec UI geral:** [Spec 040](../040-desk-design-system-v013/spec.md) (tokens, principles)  
+**Host:** VM122 · `desk.ligbox.com.br`
+
+---
+
+## 1. Problema
+
+A aba «Mensagens» mostrava apenas **pedidos de cadastro** (`/api/v1/auth/registration-requests`).
+
+Roger definiu **Central Operacional** (mockup img 3): inbox unificada omnicanal com canais, KPIs, feed de eventos, painel conversa, SLA.
+
+**Decisão:** construir UI completa + **banco simulação** até webhooks/APIs reais (WhatsApp, email inbound, telefonia, etc.).
+
+Pedidos de cadastro: preservados em `renderRegistrationRequestsLegacy()` — reintegrar via link no Controle de acesso (Spec 040).
+
+---
+
+## 2. Escopo
+
+| Fase | Estado |
+|------|--------|
+| **Fase A (actual)** | Mock SQLite + seed 6 eventos + API REST |
+| **Fase B** | Webhook email inbound → `ops_inbox_events` |
+| **Fase C** | WhatsApp Business API, Telegram, SMS |
+| **Fase D** | Integração tickets Desk + agentes A0–A7 |
+
+---
+
+## 3. Arquitetura — Aba Desk
+
+```text
+Nav: «Central Operacional» (#nav-messages, data-view=messages)
+View: #view-messages
+Host: #messages-content
+Module: messages (Spec 015 modules registry)
+
+app.staging.js
+└── renderMessages()
+    └── DeskOperationalFeed.paint(#messages-content)   [OF-FE-001]
+
+DeskOperationalFeed
+├── Sidebar canais (stats.channels)
+├── KPI row (stats)
+├── Feed entity cards (GET /events)
+└── Right panel
+    ├── Tabs: Conversa | Detalhes | Histórico
+    ├── Chat (GET event.messages + POST messages)
+    └── SLA bar + acções (PATCH event)
+```
+
+**View ID legacy:** `messages` — mantido por compatibilidade módulos/URL; **label UI** = Central Operacional.
+
+---
+
+## 4. Registo de ficheiros (referência futura)
+
+Código interno: **`OF-{tipo}-{nnn}`**
+
+### 4.1 Frontend
+
+| Código | Ficheiro | Global JS | Função |
+|--------|----------|-----------|--------|
+| **OF-FE-001** | `frontend/assets/operational-feed.js` | `window.DeskOperationalFeed` | UI Central Operacional (layout 3 colunas) |
+| **OF-FE-002** | `frontend/assets/ligbox-ds.css` | — | Partilhado Spec 040 — classes `.lb-ops-*` |
+| **OF-FE-010** | `frontend/index.html` | — | Script `operational-feed.js?v=20260629v013` |
+| **OF-FE-011** | `frontend/assets/app.staging.js` | `renderMessages()` | Delegação para `DeskOperationalFeed.paint` |
+| **OF-FE-012** | `frontend/assets/app.staging.js` | `titles.messages` | «Central Operacional» |
+| **OF-FE-013** | `frontend/assets/app.staging.js` | `subtitles.messages` | «Spec 041 · Operational feed…» |
+
+### 4.2 API — Backend
+
+| Código | Ficheiro | Router | Função |
+|--------|----------|--------|--------|
+| **OF-API-001** | `api/app/ops_inbox_store.py` | — | Schema + seed + queries SQLite |
+| **OF-API-002** | `api/app/ops_inbox_routes.py` | `/api/v1/ops-inbox` | REST endpoints |
+| **OF-API-003** | `api/app/main.py` | — | `include_router(ops_inbox_router)` + `init_inbox_schema` |
+
+### 4.3 Contratos
+
+| Código | Ficheiro | Função |
+|--------|----------|--------|
+| **OF-CTR-001** | `specs/041-desk-operational-feed/contracts/ops-inbox-api.md` | Contrato endpoints |
+| **OF-CTR-002** | `contracts/stack-services.yaml` | Serviço `vm122-ops-inbox-api` |
+
+---
+
+## 5. Endpoints — arquitectura
+
+Contrato detalhado: [contracts/ops-inbox-api.md](contracts/ops-inbox-api.md)
+
+| Código | Método | Path | Descrição |
+|--------|--------|------|-----------|
+| **OF-EP-001** | GET | `/api/v1/ops-inbox/stats` | KPIs + contadores por canal |
+| **OF-EP-002** | GET | `/api/v1/ops-inbox/events` | Lista eventos (filtros) |
+| **OF-EP-003** | GET | `/api/v1/ops-inbox/events/{id}` | Detalhe + mensagens |
+| **OF-EP-004** | POST | `/api/v1/ops-inbox/events/{id}/messages` | Resposta / nota interna |
+| **OF-EP-005** | PATCH | `/api/v1/ops-inbox/events/{id}` | status, assignee, priority |
+
+**Auth:** Bearer JWT · `can_manage_users` (fase mock — alinhar RBAC dedicado em fase B).
+
+---
+
+## 6. Modelo de dados (SQLite — fase mock)
+
+### `ops_inbox_events`
+
+| Coluna | Tipo | Descrição |
+|--------|------|-----------|
+| id | TEXT PK | ex. `evt-wa-001` |
+| channel | TEXT | `whatsapp`, `email`, `tickets`, … |
+| event_type | TEXT | `message`, `ticket`, `alert`, `missed_call` |
+| priority | TEXT | `normal`, `high`, `critical` |
+| title, preview | TEXT | Card feed |
+| tags_json | TEXT | JSON array |
+| assignee | TEXT | nullable |
+| status | TEXT | `open`, `pending`, `resolved` |
+| contact_* | TEXT | empresa, CNPJ, client_id |
+| sla_minutes, sla_remaining_sec | INT | Barra SLA UI |
+| created_at, updated_at | TEXT | ISO8601 |
+
+### `ops_inbox_messages`
+
+| Coluna | Tipo | Descrição |
+|--------|------|-----------|
+| event_id | TEXT FK | |
+| author_type | TEXT | `user`, `agent`, `operator`, `internal`, `system` |
+| author_label | TEXT | |
+| body | TEXT | |
+
+**Seed:** 6 eventos em `init_inbox_schema()` quando tabela vazia.
+
+---
+
+## 7. Canais (sidebar)
+
+| ID | Label UI |
+|----|----------|
+| all | Todos os canais |
+| email | Email |
+| whatsapp | WhatsApp API |
+| voice | Telefonia / Voz |
+| sms | SMS |
+| telegram | Telegram |
+| tickets | Tickets |
+| agents | Agentes IA |
+| internal | Solicitações internas |
+| clients | Clientes |
+| alerts | Alertas sistema |
+
+---
+
+## 8. Integrações futuras (stubs)
+
+| Canal | Endpoint futuro | Notas |
+|-------|-----------------|-------|
+| Email | `POST /api/v1/ops-inbox/webhooks/email` | Inbound parse → event |
+| WhatsApp | `POST /api/v1/ops-inbox/webhooks/whatsapp` | Meta Cloud API |
+| Tickets | Link `desk_tickets` | Sync bidireccional — **[Spec 044](../044-foss-desk-ticket-sync/spec.md)** |
+| Agentes | `agents/routes.py` threads | Unificar inbox agentes |
+| Cadastro | `registration-requests` | Link desde Spec 040 hub |
+
+---
+
+## 9. KPIs (header)
+
+| KPI | Fonte |
+|-----|-------|
+| Eventos hoje | COUNT events |
+| Pendentes | status open/pending |
+| Críticos | priority=critical |
+| Aguardando você | assignee NOT NULL + open |
+| SLA médio | Mock 96% (fase A) — calcular fase B |
+
+---
+
+## 10. Validação
+
+```bash
+curl -s -H "Authorization: Bearer $TOKEN" \
+  https://desk.ligbox.com.br/api/v1/ops-inbox/stats
+
+curl -s -H "Authorization: Bearer $TOKEN" \
+  "https://desk.ligbox.com.br/api/v1/ops-inbox/events?channel=whatsapp"
+```
+
+UI: Menu **Central Operacional** → feed com 6 cards seed → painel conversa.
+
+---
+
+## 11. Deploy
+
+Mesmo procedimento Spec 040 — ficheiros **OF-API-001/002** + **OF-FE-001**.
+
+Health API: `"version": "0.13.0-design-system"`
diff --git a/ligbox-ops-platform/specs/043-desk-client-activation-sync/spec.md b/ligbox-ops-platform/specs/043-desk-client-activation-sync/spec.md
index d891998..2ffcf7b 100644
--- a/ligbox-ops-platform/specs/043-desk-client-activation-sync/spec.md
+++ b/ligbox-ops-platform/specs/043-desk-client-activation-sync/spec.md
@@ -37,6 +37,7 @@ O Desk (VM122) é o **orquestrador**: recebe `company.validated`, persiste `bill
 | [027](../027-desk-rbac-function-matrix/spec.md) | Quem pode activar conta |
 | [039](../039-ligbox-ops-authorization-catalog/spec.md) | `vm123_foss.*`, `vm123_openpanel.*`, Odoo |
 | [040](../040-desk-design-system-v013/spec.md) | UI staff Access Control Hub |
+| [044](../044-foss-desk-ticket-sync/spec.md) | Sync tickets OB- ↔ Desk ↔ FOSS Support |
 
 ---
 
diff --git a/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/ROLLBACK.md b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/ROLLBACK.md
new file mode 100644
index 0000000..60872aa
--- /dev/null
+++ b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/ROLLBACK.md
@@ -0,0 +1,24 @@
+# Spec 044 — Rollback
+
+## Feature flag
+
+```bash
+# VM122 .env
+FOSS_TICKET_SYNC_ENABLED=false
+systemctl restart ligbox-ops-api
+```
+
+Desactiva espelho Desk→FOSS e ignora webhook FOSS→Desk (HTTP 503 «sync disabled»).
+
+## Git tags (após implementação)
+
+| Tag | Descrição |
+|-----|-----------|
+| `desk-v0.15.0-pre-spec044-ticket-sync` | Antes Spec 044 |
+| `desk-v0.15.1-spec044-ticket-sync` | Com sync FOSS tickets |
+
+## Rollback manual
+
+1. Remover `foss_sync` de tickets afectados (opcional — dados inofensivos)
+2. Tickets FOSS criados manualmente podem permanecer no FOSS admin
+3. Portal OB- e Desk continuam funcionando independentemente
diff --git a/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/contracts/ticket-field-mapping.md b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/contracts/ticket-field-mapping.md
new file mode 100644
index 0000000..046623d
--- /dev/null
+++ b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/contracts/ticket-field-mapping.md
@@ -0,0 +1,97 @@
+# Contrato — Mapeamento IDs: Portal ↔ Desk ↔ FOSS
+
+**Spec:** [044](../spec.md)  
+**Versão:** 1.0 · 2026-07-01 · Roger  
+**Status:** Fonte única para correlação de tickets  
+
+---
+
+## 1. Identificadores
+
+| Campo | Formato | Sistema dono | Persistência Desk |
+|-------|---------|--------------|-------------------|
+| `wizard_ticket_id` | `OB-[A-F0-9]{8}` | VM112 portal | `tickets.payload.wizard_ticket_id` |
+| `desk_ticket_id` | inteiro `#N` | VM122 Desk | `tickets.id` |
+| `foss_ticket_id` | inteiro FOSS | VM123 FOSS | `tickets.payload.foss_ticket_id` |
+| `external_customer_id` | inteiro FOSS client | VM123 FOSS | `billing_accounts.external_customer_id` |
+| `session_id` | UUID wizard | VM112 | `tickets.session_id` |
+| `domain` | FQDN | — | `tickets.payload.domain` |
+
+---
+
+## 2. Chaves de idempotência
+
+| Operação | Chave única | Comportamento se duplicado |
+|----------|-------------|----------------------------|
+| Portal → Desk | `event + session_id + domain` | Actualizar ticket existente (Spec 001 FR-012) |
+| Desk → FOSS espelho | `desk_ticket_id` | Retornar `foss_ticket_id` existente |
+| FOSS → Desk webhook | `foss_ticket_id + event_type` | Append nota, não criar ticket novo |
+| Cliente FOSS novo | `foss_ticket_id` | Lookup Desk; criar só se ausente |
+
+---
+
+## 3. Mapa de estados
+
+| Desk `status` | Portal OB- `status` | FOSS Support |
+|---------------|---------------------|--------------|
+| `open` | `open` | `open` |
+| `escalated` | `in_review` | `open` |
+| `assisting` | `in_progress` | `on hold` |
+| `resolved` | `resolved` | `closed` (resolvido) |
+| `closed` | `closed` | `closed` |
+
+**Regra:** Desk é master para ops; FOSS é master para visibilidade cliente billing.
+
+---
+
+## 4. Payload Desk (`tickets.payload` — extensão Spec 044)
+
+```json
+{
+  "event": "onboarding.escalated",
+  "domain": "empresa.com.br",
+  "session_id": "331b4022-70a5-4a9d-ba3e-08aaa06cb4f4",
+  "data": {
+    "wizard_ticket_id": "OB-D424843A",
+    "client_note": "DNS não propaga",
+    "reason": "client_support_request"
+  },
+  "foss_sync": {
+    "foss_ticket_id": 42,
+    "external_customer_id": 17,
+    "synced_at": "2026-07-01T18:00:00Z",
+    "last_foss_event": "ticket.reply",
+    "foss_url": "https://financeiro.ligbox.com.br/admin/support/ticket/42"
+  }
+}
+```
+
+---
+
+## 5. Pré-requisitos para espelho FOSS
+
+| Condição | Obrigatório |
+|----------|-------------|
+| `billing_accounts.external_customer_id` | Sim (Spec 043) |
+| Ticket Desk com `domain` | Sim |
+| Role staff a criar espelho | `sales_admin`, `sales_support`, `technician`, `ops_lead` |
+| Onboarding puro (sem FOSS client) | Espelho **adiado** até Activar conta |
+
+---
+
+## 6. URLs deep-link
+
+| Destino | URL |
+|---------|-----|
+| Desk ticket | `https://desk.ligbox.com.br/#ticket/{desk_ticket_id}` |
+| Portal OB- tracking | `https://onboard.ligbox.com.br/onboard?session={session_id}&ticket={wizard_ticket_id}` |
+| FOSS admin ticket | `https://financeiro.ligbox.com.br/admin/support/ticket/{foss_ticket_id}` |
+| FOSS client ticket | `https://financeiro.ligbox.com.br/support/ticket/{foss_ticket_id}` |
+
+---
+
+## Histórico
+
+| Versão | Data | Autor | Notas |
+|--------|------|-------|-------|
+| 1.0 | 2026-07-01 | Roger / Cursor | Documento inicial Spec 044 |
diff --git a/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/contracts/ticket-sync-api.md b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/contracts/ticket-sync-api.md
new file mode 100644
index 0000000..35d0b8a
--- /dev/null
+++ b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/contracts/ticket-sync-api.md
@@ -0,0 +1,175 @@
+# Contrato — API Sincronização Tickets Desk ↔ FOSS
+
+**Spec:** [044](../spec.md)  
+**VM122:** Desk API · **VM123:** FOSSBilling Admin API  
+**Status:** 📋 Especificado — implementação pendente  
+
+---
+
+## 1. Desk → FOSS — criar espelho
+
+**Quando:** ticket Desk criado ou escalado **e** `external_customer_id` disponível.
+
+### `foss_client.create_support_ticket()` (novo módulo VM122)
+
+```
+POST https://financeiro.ligbox.com.br/api/admin/support/ticket_create
+Auth: Basic admin@ligbox.com.br:{FOSS_ADMIN_API_KEY}
+Content-Type: application/x-www-form-urlencoded
+```
+
+| Campo FOSS | Origem Desk |
+|------------|-------------|
+| `client_id` | `billing_accounts.external_customer_id` |
+| `subject` | `tickets.subject` |
+| `content` | Primeira nota + link Desk + OB- se existir |
+| `helpdesk` | `Ligbox Ops` (departamento default) |
+| `priority` | mapa Desk priority → FOSS |
+
+**Resposta esperada:** `{ "result": { "id": 42 } }` → gravar `foss_ticket_id=42`.
+
+**Idempotência:** antes de criar, `GET ticket by desk_ticket_id` em cache local ou custom field FOSS `desk_ticket_id`.
+
+---
+
+## 2. FOSS → Desk — webhook inbound
+
+### `POST /api/v1/webhooks/foss/support`
+
+**Auth:** header `X-Foss-Webhook-Secret: {FOSS_WEBHOOK_SECRET}`  
+**Content-Type:** `application/json`
+
+### Payload
+
+```json
+{
+  "event": "ticket.reply",
+  "foss_ticket_id": 42,
+  "client_id": 17,
+  "domain": "empresa.com.br",
+  "subject": "Problema DNS",
+  "status": "open",
+  "message": "Cliente respondeu: ainda não resolveu",
+  "author": "client",
+  "created_at": "2026-07-01T18:05:00Z"
+}
+```
+
+| `event` | Acção Desk |
+|---------|------------|
+| `ticket.opened` | Criar ticket Desk se não existir (cliente abriu no FOSS) |
+| `ticket.reply` | Append nota interna + notificar assignee |
+| `ticket.closed` | `UPDATE tickets SET status='closed'` |
+| `ticket.reopened` | `status='open'` |
+
+### Response 200
+
+```json
+{
+  "ok": true,
+  "desk_ticket_id": 45,
+  "handled": true,
+  "duplicate": false
+}
+```
+
+### Erros
+
+| HTTP | Condição |
+|------|----------|
+| 401 | Secret inválido |
+| 404 | `foss_ticket_id` sem correlação e `client_id` desconhecido |
+| 409 | Evento duplicado (idempotência) |
+
+---
+
+## 3. Desk — API staff (fase E)
+
+### `POST /api/v1/support/tickets`
+
+**Auth:** JWT Desk · roles: `technician+`, `sales_support+`
+
+```json
+{
+  "domain": "empresa.com.br",
+  "subject": "Webmail inacessível",
+  "body": "Cliente reporta erro 502",
+  "mirror_foss": true,
+  "wizard_ticket_id": null
+}
+```
+
+**Fluxo:**
+1. Resolve `billing_accounts` por `domain`
+2. INSERT `tickets`
+3. Se `mirror_foss=true` e `external_customer_id` → `foss_client.create_support_ticket()`
+4. Return `{ desk_ticket_id, foss_ticket_id, tracking_url }`
+
+### `GET /api/v1/support/tickets/{id}/sync-status`
+
+Retorna estado sync FOSS + links.
+
+---
+
+## 4. Portal VM112 — sem alteração v1
+
+Endpoints existentes mantidos:
+
+| Método | Path | Notas |
+|--------|------|-------|
+| `POST` | `/api/onboarding/support/ticket` | Cria OB- + webhook Desk |
+| `GET` | `/api/onboarding/support/ticket/{OB-}/public` | Portal cliente Spec 026 |
+
+**Extensão fase E:** resposta inclui `desk_ticket_id` quando sync completo (opcional, não bloqueia cliente).
+
+---
+
+## 5. FOSS — configuração webhook (VM123)
+
+Opções (escolher uma na implementação):
+
+| Opção | Prós | Contras |
+|-------|------|---------|
+| **A** Hook PHP FOSS custom | Tempo real | Requer patch container |
+| **B** Cron Desk poll `support/ticket_get_list` | Sem patch FOSS | Latência 1–5 min |
+| **C** Traefik + sidecar notifier | Desacoplado | Mais infra |
+
+**Recomendação v1:** Opção **B** (poll) + Opção **A** quando estável.
+
+---
+
+## 6. Variáveis ambiente (VM122)
+
+| Variável | Descrição |
+|----------|-----------|
+| `FOSSBILLING_URL` | `https://financeiro.ligbox.com.br` |
+| `FOSS_ADMIN_EMAIL` | Conta M2M admin |
+| `FOSS_ADMIN_API_KEY` | API key FOSS (Spec 027) |
+| `FOSS_WEBHOOK_SECRET` | Validação inbound FOSS→Desk |
+| `FOSS_TICKET_SYNC_ENABLED` | `true` / `false` feature flag |
+
+---
+
+## 7. Testes curl
+
+```bash
+# Webhook simulado FOSS → Desk
+curl -s -X POST https://desk.ligbox.com.br/api/v1/webhooks/foss/support \
+  -H "X-Foss-Webhook-Secret: $FOSS_WEBHOOK_SECRET" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "event": "ticket.reply",
+    "foss_ticket_id": 42,
+    "client_id": 17,
+    "domain": "empresa.com.br",
+    "message": "Teste sync Spec 044"
+  }'
+```
+
+---
+
+## Histórico
+
+| Versão | Data | Notas |
+|--------|------|-------|
+| 1.0 | 2026-07-01 | Contrato inicial Spec 044 |
diff --git a/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/spec.md b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/spec.md
new file mode 100644
index 0000000..f1225aa
--- /dev/null
+++ b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/spec.md
@@ -0,0 +1,109 @@
+# Spec 044 — Sincronização Tickets: Portal ↔ Desk ↔ FOSS
+
+**Criado:** 2026-07-01  
+**Solicitado por:** Roger  
+**Status:** 📋 **Especificado — implementação pendente**  
+**Prioridade:** P1 (suporte unificado pós-activação)  
+**Sistemas:** VM112 Portal · VM122 Desk · VM123 FOSSBilling  
+
+---
+
+## Resumo
+
+Hoje existem **três filas de tickets isoladas**:
+
+| Sistema | ID | Estado |
+|---------|-----|--------|
+| Portal wizard (VM112) | `OB-XXXXXXXX` | ✅ Activo — JSON local + portal cliente |
+| Desk Ops (VM122) | `#N` / `CH-*` | ✅ Activo — webhook VM112 |
+| FOSS Support (VM123) | `foss_ticket_id` | ❌ **Sem sync** com portal/Desk |
+
+Esta spec define a **ponte bidireccional** Desk ↔ FOSS, preservando o portal wizard como canal de entrada do cliente e o Desk como **fonte de verdade operacional**.
+
+**Contratos:**
+- [ticket-field-mapping.md](./contracts/ticket-field-mapping.md) — chaves de correlação
+- [ticket-sync-api.md](./contracts/ticket-sync-api.md) — webhooks e endpoints API
+
+---
+
+## Specs relacionadas
+
+| Spec | Relação |
+|------|---------|
+| [001](../001-webhook-vm112-integration/spec.md) | Webhooks VM112 → Desk (base) |
+| [010](../010-desk-assist-takeover/spec.md) | Escalada, ASM, `onboarding.escalated` |
+| [012](../012-abandoned-onboarding-lead/spec.md) | Ticket único por jornada onboarding |
+| [024](../024-openpanel-fossbilling/spec.md) | FOSS VM123, módulo Support |
+| [027](../027-desk-rbac-function-matrix/contracts/vm123-product-roles.md) | `support` FOSS, roles comercial |
+| [039](../039-ligbox-ops-authorization-catalog/spec.md) | `vm123_foss.support.ticket` |
+| [041](../041-desk-operational-feed/spec.md) | Central Operacional — canal Tickets |
+| [043](../043-desk-client-activation-sync/spec.md) | `external_customer_id` FOSS pós-activação |
+
+---
+
+## Arquitectura alvo
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│ VM112 — Portal (onboard.ligbox.com.br)                                   │
+│  OB-* tickets · POST /api/onboarding/support/ticket                      │
+│  Cliente acompanha: GET .../support/ticket/{OB-}/public                  │
+└───────────────────────────────┬─────────────────────────────────────────┘
+                                │ webhook onboarding.escalated (+ started)
+                                ▼
+┌─────────────────────────────────────────────────────────────────────────┐
+│ VM122 — Desk (fonte de verdade ops)                                      │
+│  tickets.payload: wizard_ticket_id, foss_ticket_id, external_customer_id│
+│  Staff: Chamados · Serviços · Central Operacional (041)                  │
+└───────────────┬───────────────────────────────┬─────────────────────────┘
+                │ POST espelho (M2M)             │ webhook FOSS → Desk
+                ▼                                ▼
+┌─────────────────────────────────────────────────────────────────────────┐
+│ VM123 — FOSSBilling Support                                              │
+│  Cliente: financeiro.ligbox.com.br/support                               │
+│  Staff: /admin/support · API /api/admin/support/*                        │
+└─────────────────────────────────────────────────────────────────────────┘
+```
+
+---
+
+## Regras de negócio
+
+1. **Um incidente = um ticket Desk** — nunca duplicar `#N` para a mesma `session_id` ou `foss_ticket_id`.
+2. **Portal OB-** continua a existir para onboarding; Desk grava `wizard_ticket_id` no payload (já parcialmente implementado na UI).
+3. **FOSS espelho** só após `external_customer_id` conhecido (Spec 043) — tickets de onboarding pré-FOSS ficam só Desk + OB-.
+4. **Sync bidireccional de estado:** `open` ↔ `in_progress` ↔ `resolved` ↔ `closed` (mapa em contrato).
+5. **Cliente pós-activação** pode abrir ticket no FOSS client area **ou** no portal/console Ligbox; ambos convergem no Desk.
+
+---
+
+## Fases de implementação
+
+| Fase | Entrega | VM |
+|------|---------|-----|
+| **A** | Documentação + contratos (esta spec) | CT130 |
+| **B** | `foss_client.create_support_ticket()` + espelho Desk→FOSS | VM122 |
+| **C** | Webhook FOSS → Desk (`POST /api/v1/webhooks/foss/support`) | VM122 + VM123 |
+| **D** | UI Desk: link FOSS ticket + badge sync | VM122 |
+| **E** | Portal pós-activação: criar via Desk API (propaga FOSS) | VM112 / Console |
+
+Ver [tasks.md](./tasks.md).
+
+---
+
+## Fora de escopo (v1)
+
+- OTRS (→ Spec 011)
+- Sync automático e-mail inbound (→ Spec 041 fase B)
+- Tickets Odoo Helpdesk
+
+---
+
+## Validação Roger
+
+```bash
+# 1) Cliente abre OB- no wizard → Desk #N com wizard_ticket_id
+# 2) Activar conta (Spec 043) → external_customer_id preenchido
+# 3) Staff responde no Desk → foss_ticket_id criado no FOSS
+# 4) Cliente responde no FOSS → webhook actualiza nota no Desk #N
+```
diff --git a/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/tasks.md b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/tasks.md
new file mode 100644
index 0000000..495bbf6
--- /dev/null
+++ b/ligbox-ops-platform/specs/044-foss-desk-ticket-sync/tasks.md
@@ -0,0 +1,42 @@
+# Spec 044 — Tasks
+
+## Documentação
+- [x] Spec índice `spec.md`
+- [x] Contrato `contracts/ticket-field-mapping.md`
+- [x] Contrato `contracts/ticket-sync-api.md`
+- [x] Registo em `SPEC-REGISTRY.md`
+- [x] Ligações cruzadas specs 010/012/024/041/043
+- [x] Sync Obsidian VM130
+
+## Fase A — Estado actual (baseline)
+- [x] Portal OB- → Desk via `onboarding.escalated` (VM112)
+- [x] UI Desk mostra `wizard_ticket_id` (OB-) no painel ticket
+- [x] FOSS Support nativo em VM123 (sem bridge)
+- [ ] Inventário endpoints FOSS Support API (Roger validar admin)
+
+## Fase B — Desk → FOSS (espelho)
+- [ ] Coluna/payload `foss_ticket_id` em `tickets`
+- [ ] `foss_client.create_support_ticket()` — M2M admin API
+- [ ] Hook pós-criação ticket Desk: se `billing_accounts.external_customer_id` → espelho FOSS
+- [ ] Idempotência: não recriar se `foss_ticket_id` já existe
+- [ ] Unit tests `test_foss_ticket_sync_044.py`
+
+## Fase C — FOSS → Desk (webhook)
+- [ ] Endpoint `POST /api/v1/webhooks/foss/support` (auth `FOSS_WEBHOOK_SECRET`)
+- [ ] Plugin/hook FOSS ou cron poll — eventos `ticket.opened`, `ticket.reply`, `ticket.closed`
+- [ ] Upsert nota / status no ticket Desk correlacionado
+- [ ] Log em `webhook_events` source=`vm123-foss`
+
+## Fase D — UI Desk
+- [ ] Painel ticket: badge «FOSS #123» + deep-link `financeiro.ligbox.com.br/admin/support`
+- [ ] Serviços IaaS / ficha cliente: «Abrir ticket FOSS» (roles sales_admin, sales_support)
+- [ ] Central Operacional (041): evento `desk_tickets` com `foss_ticket_id`
+
+## Fase E — Portal pós-activação
+- [ ] Console `/me/suporte` ou FOSS client area — single entry (decisão Roger)
+- [ ] API Desk `POST /api/v1/support/tickets` → cria Desk + FOSS espelho
+- [ ] Resposta cliente inclui `tracking_url` (portal ou FOSS)
+
+## Testes E2E
+- [ ] Roger: OB- onboarding → activar conta → staff responde → cliente vê no FOSS
+- [ ] Roger: cliente abre ticket FOSS → aparece no Desk Chamados
diff --git a/ligbox-ops-platform/specs/SPEC-REGISTRY.md b/ligbox-ops-platform/specs/SPEC-REGISTRY.md
index 95cd1da..1e06240 100644
--- a/ligbox-ops-platform/specs/SPEC-REGISTRY.md
+++ b/ligbox-ops-platform/specs/SPEC-REGISTRY.md
@@ -8,5 +8,6 @@
 | **041** | **`041-desk-operational-feed/`** | **Central Operacional (ex-Mensagens) + ops-inbox API** | **0.13.0** |
 | **042** | **`042-ligbox-nettools-portal/`** | **NetTools — 23 ferramentas OSS em nettools.ligbox.com.br** | — |
 | **043** | **`043-desk-client-activation-sync/`** | **Mapa campos Wizard→Desk→FOSS→OpenPanel→Odoo + API Activar conta** | — |
+| **044** | **`044-foss-desk-ticket-sync/`** | **Sync tickets Portal OB- ↔ Desk ↔ FOSS Support** | — |
 
-Atualizado: 2026-07-01 · Roger · Spec 043 mapeamento activação cliente
+Atualizado: 2026-07-01 · Roger · Spec 044 sync tickets FOSS/portal