feat(circles): add update_circle tool (v0.7.4)

Implements accupdatefamily endpoint (verified via FW_DEBUG=1):
- Parameter 'scope' targets any circle (primary or secondary)
- Without scope: renames the primary circle (API default)
- Server always capitalises the first letter of the new name
- Verifies circle existence via famlistfamily in same session
- Response a00.r.r = full circle object with updated name

Also corrects SPEC.md: accupdatefamily with scope= works for any
circle, not just the primary (previous note was incomplete).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -24,7 +24,7 @@ und wird in Claude Desktop eingebunden.
 
 ## Aktueller Stand
 
-### Implementierte Tools (v0.7.3)
+### Implementierte Tools (v0.7.4)
 
 | Kategorie | Tools |
 |---|---|
@@ -34,7 +34,7 @@ und wird in Claude Desktop eingebunden.
 | Kategorien | `create_category`, `delete_category` |
 | Aktivitäten | `like_post` |
 | Rezepte | `get_recipes`, `get_recipe`, `create_recipe`, `update_recipe`, `delete_recipe` |
-| Kreise | `create_circle`, `delete_circle`, `add_member_to_circle` |
+| Kreise | `create_circle`, `update_circle`, `delete_circle`, `add_member_to_circle` |
 
 ## Roadmap
 
@@ -48,8 +48,9 @@ und wird in Claude Desktop eingebunden.
 - v0.7.0: create_circle + add_member_to_circle ✓
 - v0.7.1: get_lists scope fix + create_list circle_id + delete_list scope ✓
 - v0.7.2: delete_circle ✓
-- v0.7.3: update_list (Umbenennen, emoji/color ändern) ✓ ← aktuell
+- v0.7.3: update_list (Umbenennen, emoji/color ändern) ✓
-- v0.7.4: mpadditemtolist (Zutaten → Einkaufsliste)
+- v0.7.4: update_circle (Kreis umbenennen) ✓ ← aktuell
+- v0.7.5: mpadditemtolist (Zutaten → Einkaufsliste)
 - v0.8.x: Erinnerungen + Wiederholungen (Premium-Account erforderlich)
 - v2.0: Schreibzugriff auf Wall-Posts (Erstellen, Kommentieren)
 
@@ -148,7 +149,7 @@ Fehler bei falschen Parametern kommen nicht immer auf Top-Level:
 | `metasync` (Rezepte lesen) | `id="recipe"` | liefert `a00.r.r.updatedCreated[]` |
 | `acccreatefamily` | `name` | liefert numerische Kreis-ID als String in `a00.r.r` |
 | `accinvite` | `familyId`, `identifier`, `role="Unknown"`, `firstname` | nur für neue FW-Accounts |
-| `accupdatefamily` | `name` | aktualisiert immer den PRIMARY Kreis (ignoriert `id`/`familyId`) |
+| `accupdatefamily` | `name`, `scope` | `scope`: Kreis-metaId; ohne scope → PRIMARY Kreis; erster Buchstabe wird kapitalisiert |
 | `adminwipefamily` | `scope` | Kreis-metaId; löscht Kreis + alle Inhalte; `a00.r.r="true"` bei Erfolg |
 
 ### Self-Like-Restriction

README.md

@@ -2,7 +2,7 @@
 
 MCP server for [Family Wall](https://www.familywall.com) -- read and manage your family's circles, lists, tasks, and recipes directly from Claude.
 
-## Features (v0.7.3)
+## Features (v0.7.4)
 
 ### Read
 
@@ -31,6 +31,7 @@ MCP server for [Family Wall](https://www.familywall.com) -- read and manage your
 - `update_recipe` -- update any field of an existing recipe (partial update — omitted fields unchanged)
 - `delete_recipe` -- permanently delete a recipe (only own recipes)
 - `create_circle` -- create a new Family Wall circle (group)
+- `update_circle` -- rename a circle (server capitalises first letter; only name is changeable via API)
 - `delete_circle` -- permanently delete a circle and all its content (primary circle is protected)
 - `add_member_to_circle` -- invite a person to a circle by e-mail (for new Family Wall users only; existing accounts require in-app invitation)
 

SPEC.md

@@ -611,10 +611,28 @@ POST https://api.familywall.com/api/accupdatefamily
 | Parameter | Pflicht | Wert |
 |---|---|---|
 | `name` | ja | Neuer Kreis-Name |
+| `scope` | nein | Kreis-metaId z.B. `"family/23449644"` (ohne scope → primärer Kreis) |
 
-**Hinweis:** Aktualisiert immer den PRIMARY Kreis des Accounts (ignoriert `id`/`familyId` Parameter).
+**Response:**
+```
+a00.r.r                     → vollständiges Kreis-Objekt
+  .metaId                   → Kreis-metaId (z.B. "family/23449644")
+  .name                     → (aktualisierter) Kreis-Name (erster Buchstabe wird kapitalisiert)
+  .family_id                → numerische Kreis-ID (ohne "family/"-Prefix)
+  .members[]                → Mitglieder-Liste
+```
 
-**Verifiziert am:** 2026-04-16 via FW_DEBUG=1
+**Hinweise:**
+- Ohne `scope`: aktualisiert den PRIMARY Kreis des Accounts.
+- Mit `scope=family/XXXX`: aktualisiert den angegebenen Kreis (primär oder sekundär).
+- Der Server kapitalisiert immer den ersten Buchstaben des Namens.
+- Nur der Name ist über die API änderbar (kein Bild, keine Farbe).
+
+**Vorherige Dokumentation korrigiert:** Frühere SPEC-Einträge vermerkten,
+dass `id`/`familyId` ignoriert werden. Mit `scope=` funktioniert die
+Zielauswahl korrekt für beliebige Kreise.
+
+**Verifiziert am:** 2026-04-16 via FW_DEBUG=1 (scope= auf sekundärem Kreis)
 
 ### `adminwipefamily` – Kreis löschen
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "mcp-familywall"
-version = "0.7.3"
+version = "0.7.4"
 description = "MCP server for Family Wall — read your family's lists and tasks via Claude"
 readme = "README.md"
 requires-python = ">=3.12"

src/mcp_familywall/__init__.py

@@ -1 +1 @@
-__version__ = "0.7.3"
+__version__ = "0.7.4"

src/mcp_familywall/server.py

@@ -1342,6 +1342,96 @@ def create_circle(name: str) -> str:
     )
 
 
+# ---------------------------------------------------------------------------
+# Tool: update_circle
+# ---------------------------------------------------------------------------
+
+
+@mcp.tool()
+def update_circle(circle_id: str, name: str) -> str:
+    """Rename a Family Wall circle.
+
+    IMPORTANT: Ask the user for confirmation before calling this tool.
+
+    Only the circle name can be changed via the API.  Note that the server
+    always capitalises the first letter of the new name.
+
+    Args:
+        circle_id: Circle metaId from ``get_circles``
+            (e.g. ``"family/23431854"``).
+        name: New display name for the circle.
+
+    Returns:
+        JSON with ``{updated, id, name}`` on success, or an error message.
+    """
+    if not name or not name.strip():
+        return "Error: 'name' must not be empty."
+
+    try:
+        email, password = get_credentials()
+    except RuntimeError as exc:
+        return f"Error: {exc}"
+
+    try:
+        with FamilyWallClient() as client:
+            client.login(email, password)
+
+            # Verify the circle exists before attempting the update.
+            circles_data = client.call("famlistfamily")
+            try:
+                raw_circles: list[dict[str, Any]] = circles_data["a00"]["r"]["r"]
+                if not isinstance(raw_circles, list):
+                    raise TypeError("a00.r.r is not a list")
+            except (KeyError, TypeError):
+                client.logout()
+                return "Error: Unexpected famlistfamily response structure."
+
+            target = next((c for c in raw_circles if c.get("metaId") == circle_id), None)
+            if target is None:
+                client.logout()
+                available = [c.get("metaId") for c in raw_circles]
+                return json.dumps(
+                    {
+                        "error": f"Circle not found: {circle_id!r}",
+                        "available_circles": available,
+                    },
+                    ensure_ascii=False,
+                    indent=2,
+                )
+
+            # Rename the circle.
+            # Verified: accupdatefamily with scope=<circle_metaId> targets any circle,
+            # both primary and secondary. The server capitalises the first letter.
+            resp = client.call("accupdatefamily", {"scope": circle_id, "name": name})
+            client.logout()
+    except FamilyWallError as exc:
+        return f"Error: Family Wall API error: {exc}"
+    except Exception as exc:
+        return f"Error: Connection error: {exc}"
+
+    # Response: a00.r.r = full circle object
+    try:
+        circle_obj: dict[str, Any] = resp["a00"]["r"]["r"]
+        if not isinstance(circle_obj, dict) or "metaId" not in circle_obj:
+            raise TypeError("unexpected shape")
+    except (KeyError, TypeError):
+        return json.dumps(
+            {"warning": "Unexpected accupdatefamily response structure", "raw": resp},
+            ensure_ascii=False,
+            indent=2,
+        )
+
+    return json.dumps(
+        {
+            "updated": True,
+            "id": circle_obj.get("metaId"),
+            "name": circle_obj.get("name"),
+        },
+        ensure_ascii=False,
+        indent=2,
+    )
+
+
 # ---------------------------------------------------------------------------
 # Tool: add_member_to_circle
 # ---------------------------------------------------------------------------