diff --git a/crates/manager-core/migrations/0057_group_routes.sql b/crates/manager-core/migrations/0057_group_routes.sql
new file mode 100644
index 0000000..2874237
--- /dev/null
+++ b/crates/manager-core/migrations/0057_group_routes.sql
@@ -0,0 +1,48 @@
+-- §11 tail (v1.2 Hierarchies): group ROUTE templates.
+--
+-- Until now every route was owned by exactly one app (`app_id NOT NULL`).
+-- A group-owned route is a TEMPLATE: it is never served directly, but the
+-- in-memory RouteTable rebuild EXPANDS it into every descendant app's slice
+-- via the ancestor chain (live resolution, like vars/secrets/scripts, §11.6
+-- collections, and §11 trigger templates — no per-app materialized rows). It
+-- binds a group-owned handler script and runs under each firing app's
+-- `app_id`.
+--
+-- Unlike triggers (a SQL-per-event dispatch), routes are served from an
+-- in-memory cache, so the inheritance is resolved at table-rebuild time, not
+-- per request. The reshape, however, is identical: a polymorphic owner column.
+--
+-- Reshape mirrors 0056_group_triggers exactly (RESTRICT, not CASCADE — a route
+-- template references a group script; a group can't be deleted out from under
+-- it):
+--   * `group_id` — nullable FK→groups, ON DELETE RESTRICT.
+--   * `app_id`   — made nullable; the exactly-one CHECK enforces app XOR group.
+--   * the per-app unique binding index becomes per-owner partials.
+
+ALTER TABLE routes
+    ADD COLUMN group_id UUID REFERENCES groups(id) ON DELETE RESTRICT;
+
+ALTER TABLE routes
+    ALTER COLUMN app_id DROP NOT NULL;
+
+ALTER TABLE routes
+    ADD CONSTRAINT routes_owner_exactly_one
+        CHECK ((group_id IS NULL) <> (app_id IS NULL));
+
+-- Per-owner binding uniqueness (partial so each owner column only constrains
+-- its own rows). Existing app rows keep the exact binding-tuple uniqueness; a
+-- group can't declare two identical templates. An app declaring a binding
+-- identical to an inherited group template is a deliberate SHADOW, resolved
+-- at rebuild (nearest-owner-wins) — not a DB conflict.
+DROP INDEX routes_unique_binding_idx;
+CREATE UNIQUE INDEX routes_unique_binding_idx
+    ON routes (app_id, host_kind, host, path_kind, path, COALESCE(method, ''))
+    WHERE app_id IS NOT NULL;
+CREATE UNIQUE INDEX routes_group_binding_idx
+    ON routes (group_id, host_kind, host, path_kind, path, COALESCE(method, ''))
+    WHERE group_id IS NOT NULL;
+
+-- The expansion join matches routes by owner (`r.app_id = ac.owner_app OR
+-- r.group_id = ac.owner_group`). The app side already has routes_app_id_idx;
+-- add the parallel group lookup index.
+CREATE INDEX routes_group_id_idx ON routes (group_id) WHERE group_id IS NOT NULL;
diff --git a/crates/manager-core/tests/expected_schema.txt b/crates/manager-core/tests/expected_schema.txt
index 506efc0..b4299fd 100644
--- a/crates/manager-core/tests/expected_schema.txt
+++ b/crates/manager-core/tests/expected_schema.txt
@@ -338,9 +338,10 @@ table: routes
   path: text NOT NULL
   method: text NULL
   created_at: timestamp with time zone NOT NULL default=now()
-  app_id: uuid NOT NULL
+  app_id: uuid NULL
   dispatch_mode: text NOT NULL default='sync'::text
   enabled: boolean NOT NULL default=true
+  group_id: uuid NULL
 
 table: script_imports
   app_id: uuid NOT NULL
@@ -578,10 +579,12 @@ indexes on queue_trigger_details:
 
 indexes on routes:
   routes_app_id_idx: public.routes USING btree (app_id)
+  routes_group_binding_idx: public.routes USING btree (group_id, host_kind, host, path_kind, path, COALESCE(method, ''::text)) WHERE (group_id IS NOT NULL)
+  routes_group_id_idx: public.routes USING btree (group_id) WHERE (group_id IS NOT NULL)
   routes_lookup_idx: public.routes USING btree (host_kind, host)
   routes_pkey: public.routes USING btree (id)
   routes_script_id_idx: public.routes USING btree (script_id)
-  routes_unique_binding_idx: public.routes USING btree (app_id, host_kind, host, path_kind, path, COALESCE(method, ''::text))
+  routes_unique_binding_idx: public.routes USING btree (app_id, host_kind, host, path_kind, path, COALESCE(method, ''::text)) WHERE (app_id IS NOT NULL)
 
 indexes on script_imports:
   idx_script_imports_app: public.script_imports USING btree (app_id)
@@ -802,8 +805,10 @@ constraints on queue_trigger_details:
 constraints on routes:
   [CHECK] routes_dispatch_mode_check: CHECK ((dispatch_mode = ANY (ARRAY['sync'::text, 'async'::text])))
   [CHECK] routes_host_kind_check: CHECK ((host_kind = ANY (ARRAY['any'::text, 'strict'::text, 'wildcard'::text])))
+  [CHECK] routes_owner_exactly_one: CHECK (((group_id IS NULL) <> (app_id IS NULL)))
   [CHECK] routes_path_kind_check: CHECK ((path_kind = ANY (ARRAY['exact'::text, 'prefix'::text, 'param'::text])))
   [FOREIGN KEY] routes_app_id_fk: FOREIGN KEY (app_id) REFERENCES apps(id) ON DELETE CASCADE
+  [FOREIGN KEY] routes_group_id_fkey: FOREIGN KEY (group_id) REFERENCES groups(id) ON DELETE RESTRICT
   [FOREIGN KEY] routes_script_id_fkey: FOREIGN KEY (script_id) REFERENCES scripts(id) ON DELETE CASCADE
   [PRIMARY KEY] routes_pkey: PRIMARY KEY (id)
 
@@ -907,3 +912,4 @@ constraints on vars:
   0054: group docs
   0055: group files
   0056: group triggers
+  0057: group routes