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docs/api/routes/brand/update.md

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+# `PATCH /brand/{id}`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Rename brand
+
+Renames/updates a brand by id for the selected company. Fails with
+`Brand already exists` if the name is taken by another brand.
+When the name changes, linked articles (`brand_id`) get their
+`updated_at` bumped; the response reports `touchedArticleCount`.
+Emits SSE signal `brand` with payload `{ sender, brandId }`
+(`sender` echoes the caller's `x-client-id`).
+
+
+## Path parameters
+
+| Param | Required | Type | Description |
+|-------|----------|------|-------------|
+| `id` | yes | integer |  |
+
+## Body (JSON)
+
+| Field | Required | Type | Description |
+|-------|----------|------|-------------|
+| `name` | no | string |  |
+| `gsprpinfo` | no | string |  |
+
+```json
+{
+  "name": "Acme GmbH"
+}
+```
+
+## Signals
+
+On success, emits SSE signal: `brand` (see [`GET /events`](../events.md)).
+
+## Response `200`
+
+Updated brand
+
+```json
+{
+  "brand": {
+    "id": 1,
+    "name": "…",
+    "gsprpinfo": "…",
+    "touchedArticleCount": 1
+  }
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Invalid brand, invalid id, or no company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Brand or company not found — `{"error":"…"}` |
+| 409 | Brand already exists — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._