Add /unregister endpoint and document Claude Code hooks for graceful shutdown

.gitignore

@@ -2,5 +2,6 @@ node_modules/
 .state/
 conversations/
 data/
+drafts/
 *.log
 *.db

README.md

@@ -169,6 +169,7 @@ mcp-claude-duo/
 | Endpoint | Method | Description |
 |----------|--------|-------------|
 | `/register` | POST | Register a partner |
+| `/unregister` | POST | Unregister / go offline |
 | `/talk` | POST | Send a message |
 | `/listen/:partnerId` | GET | Long-poll for messages |
 | `/conversations` | POST | Create group conversation |
@@ -197,6 +198,42 @@ See [docs/db-schema.md](docs/db-schema.md) for full schema documentation.
 | `BROKER_PORT` | `3210` | Broker listen port |
 | `PARTNER_NAME` | `Claude` | Display name for the partner |
 
+### Graceful Shutdown with Hooks
+
+To properly mark your Claude instance as offline when the MCP stops, configure a Claude Code hook.
+
+**1. Create a settings file (if not exists):**
+
+Create or edit `~/.claude/settings.json`:
+
+```json
+{
+  "hooks": {
+    "Stop": [
+      {
+        "matcher": "duo-partner",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "curl -X POST http://localhost:3210/unregister -H \"Content-Type: application/json\" -d \"{\\\"partnerId\\\": \\\"$PARTNER_ID\\\"}\""
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+**2. Or use the Claude CLI:**
+
+```bash
+claude config set hooks.Stop '[{"matcher": "duo-partner", "hooks": [{"type": "command", "command": "curl -X POST http://localhost:3210/unregister -H \"Content-Type: application/json\" -d \"{\\\"partnerId\\\": \\\"YOUR_PROJECT_NAME\\\"}\""}]}]'
+```
+
+Replace `YOUR_PROJECT_NAME` with your actual partner ID (usually derived from your project folder name).
+
+**Note:** Without this hook, partners will remain marked as "online" until the broker restarts or they reconnect.
+
 ## Contributing
 
 Contributions are welcome! See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.

broker/index.js

@@ -434,6 +434,35 @@ app.post("/partners/:partnerId/notifications", (req, res) => {
   res.json({ success: true });
 });
 
+/**
+ * Se désenregistrer / passer offline
+ * POST /unregister
+ * Body: { partnerId }
+ */
+app.post("/unregister", (req, res) => {
+  const { partnerId } = req.body;
+
+  if (!partnerId) {
+    return res.status(400).json({ error: "partnerId required" });
+  }
+
+  // Fermer la connexion long-polling si active
+  if (waitingPartners.has(partnerId)) {
+    const { res: waitingRes, heartbeat, timeout } = waitingPartners.get(partnerId);
+    clearInterval(heartbeat);
+    if (timeout) clearTimeout(timeout);
+    waitingPartners.delete(partnerId);
+    try {
+      waitingRes.json({ hasMessages: false, messages: [], reason: "unregistered" });
+    } catch {}
+  }
+
+  DB.setPartnerOffline(partnerId);
+  console.log(`[BROKER] Unregistered: ${partnerId}`);
+
+  res.json({ success: true });
+});
+
 /**
  * Health check
  */