diff --git a/messages/de.json b/messages/de.json
index b928bc2ac..bd7fc6f34 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -9642,6 +9642,29 @@
       "kindManaged": "Verwaltetes Profil",
       "open": "Akte von {name} öffnen"
     },
+    "managed": {
+      "title": "Profile, die du betreust",
+      "description": "Gesundheitsakten ohne eigenen Login.",
+      "explainer": "Ein verwaltetes Profil ist eine Gesundheitsakte für jemanden, der sich nicht selbst anmeldet — ein Kind oder eine Person, um die du dich kümmerst. Es hat keinen Login und keine E-Mail-Adresse, und du wirst die erste betreuende Person. Später kannst du weitere hinzufügen, und ihr alle könnt in die Akte wechseln, um sie zu pflegen.",
+      "nameLabel": "Name",
+      "namePlaceholder": "Der Name, an dem du diese Akte erkennst",
+      "nameHint": "Bis zu 80 Zeichen. Wird überall dort angezeigt, wo diese Akte auftaucht.",
+      "nameRequired": "Gib der Akte einen Namen.",
+      "nameTooLong": "Dieser Name ist länger als 80 Zeichen.",
+      "dobLabel": "Geburtsdatum (optional)",
+      "dobHint": "Lass das Feld leer, wenn du keines hinterlegen willst. Aus einem Jahrgang wird nichts abgeleitet.",
+      "localeLabel": "Sprache dieser Akte",
+      "localeHint": "Die Sprache für Texte, die in diese Akte geschrieben werden. Deine eigenen Ansichten bleiben in deiner Sprache.",
+      "timezoneHint": "Die Zeitzone, in der die Tage dieser Akte gezählt werden.",
+      "timezoneInvalid": "Diese Zeitzone kennt der Browser nicht.",
+      "create": "Profil anlegen",
+      "creating": "Wird angelegt…",
+      "created": "{name} ist eingerichtet. Über das Kontomenü kannst du in diese Akte wechseln.",
+      "errorStepUp": "Bestätige deinen zweiten Faktor und versuche es erneut.",
+      "errorOffline": "Das hat den Server nicht erreicht. Es hat sich nichts geändert — prüfe deine Verbindung und versuche es erneut.",
+      "errorInvalid": "Der Server hat diese Angaben abgelehnt. Prüfe Name, Datum und Zeitzone.",
+      "errorFailed": "Das Profil konnte nicht angelegt werden."
+    },
     "toast": {
       "savedTo": "In der Akte von {name} gespeichert."
     },
diff --git a/messages/en.json b/messages/en.json
index 208915163..782d47575 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -9642,6 +9642,29 @@
       "kindManaged": "Managed profile",
       "open": "Open {name}'s record"
     },
+    "managed": {
+      "title": "Records you look after",
+      "description": "Health records with no login of their own.",
+      "explainer": "A managed profile is a health record for somebody who does not sign in themselves — a child, or a person you care for. It has no login and no e-mail address, and you become its first guardian. You can add more guardians later, and any of you can switch into the record to keep it up to date.",
+      "nameLabel": "Name",
+      "namePlaceholder": "The name you will recognise this record by",
+      "nameHint": "Up to 80 characters. Shown wherever this record appears.",
+      "nameRequired": "Give the record a name.",
+      "nameTooLong": "That name is longer than 80 characters.",
+      "dobLabel": "Date of birth (optional)",
+      "dobHint": "Leave it empty if you would rather not record one. Nothing is guessed from a year.",
+      "localeLabel": "Language of this record",
+      "localeHint": "The language used for text written into this record. Your own screens stay in your language.",
+      "timezoneHint": "The zone this record's days are measured in.",
+      "timezoneInvalid": "This browser does not know that timezone.",
+      "create": "Create profile",
+      "creating": "Creating…",
+      "created": "{name} is set up. You can switch into that record from the account menu.",
+      "errorStepUp": "Confirm your second factor, then try again.",
+      "errorOffline": "That did not reach the server. Nothing has changed — check your connection and try again.",
+      "errorInvalid": "The server refused those details. Check the name, the date and the timezone.",
+      "errorFailed": "The profile could not be created."
+    },
     "toast": {
       "savedTo": "Saved to {name}'s record."
     },
diff --git a/messages/es.json b/messages/es.json
index 8cc2cb450..574c9cb63 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -9642,6 +9642,29 @@
       "kindManaged": "Perfil administrado",
       "open": "Abrir el historial de {name}"
     },
+    "managed": {
+      "title": "Perfiles de los que te ocupas",
+      "description": "Historiales de salud sin inicio de sesión propio.",
+      "explainer": "Un perfil administrado es un historial de salud para alguien que no inicia sesión — una criatura, o una persona a la que cuidas. No tiene inicio de sesión ni dirección de correo, y tú pasas a ser su primera persona responsable. Más adelante puedes añadir otras, y cualquiera de vosotras puede entrar en el historial para mantenerlo al día.",
+      "nameLabel": "Nombre",
+      "namePlaceholder": "El nombre con el que reconocerás este historial",
+      "nameHint": "Hasta 80 caracteres. Se muestra allá donde aparezca este historial.",
+      "nameRequired": "Dale un nombre al historial.",
+      "nameTooLong": "Ese nombre tiene más de 80 caracteres.",
+      "dobLabel": "Fecha de nacimiento (opcional)",
+      "dobHint": "Déjala vacía si prefieres no registrarla. No se deduce nada a partir de un año.",
+      "localeLabel": "Idioma de este historial",
+      "localeHint": "El idioma de los textos que se escriben en este historial. Tus propias pantallas siguen en tu idioma.",
+      "timezoneHint": "La zona en la que se miden los días de este historial.",
+      "timezoneInvalid": "Este navegador no conoce esa zona horaria.",
+      "create": "Crear perfil",
+      "creating": "Creando…",
+      "created": "{name} ya está listo. Puedes entrar en ese historial desde el menú de la cuenta.",
+      "errorStepUp": "Confirma tu segundo factor y vuelve a intentarlo.",
+      "errorOffline": "Esto no llegó al servidor. No ha cambiado nada — revisa tu conexión y vuelve a intentarlo.",
+      "errorInvalid": "El servidor rechazó esos datos. Revisa el nombre, la fecha y la zona horaria.",
+      "errorFailed": "No se pudo crear el perfil."
+    },
     "toast": {
       "savedTo": "Guardado en el historial de {name}."
     },
diff --git a/messages/fr.json b/messages/fr.json
index 6668aba8d..14efafce6 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -9642,6 +9642,29 @@
       "kindManaged": "Profil géré",
       "open": "Ouvrir le dossier de {name}"
     },
+    "managed": {
+      "title": "Profils dont vous vous occupez",
+      "description": "Dossiers de santé sans identifiants propres.",
+      "explainer": "Un profil géré est un dossier de santé pour quelqu'un qui ne se connecte pas lui-même — un enfant, ou une personne dont vous vous occupez. Il n'a ni identifiants ni adresse e-mail, et vous en devenez la première personne responsable. Vous pourrez en ajouter d'autres plus tard, et chacune pourra entrer dans le dossier pour le tenir à jour.",
+      "nameLabel": "Nom",
+      "namePlaceholder": "Le nom sous lequel vous reconnaîtrez ce dossier",
+      "nameHint": "Jusqu'à 80 caractères. Affiché partout où ce dossier apparaît.",
+      "nameRequired": "Donnez un nom au dossier.",
+      "nameTooLong": "Ce nom dépasse 80 caractères.",
+      "dobLabel": "Date de naissance (facultatif)",
+      "dobHint": "Laissez le champ vide si vous préférez ne pas en enregistrer. Rien n'est déduit d'une année.",
+      "localeLabel": "Langue de ce dossier",
+      "localeHint": "La langue des textes écrits dans ce dossier. Vos propres écrans restent dans votre langue.",
+      "timezoneHint": "Le fuseau dans lequel les journées de ce dossier sont comptées.",
+      "timezoneInvalid": "Ce navigateur ne connaît pas ce fuseau horaire.",
+      "create": "Créer le profil",
+      "creating": "Création…",
+      "created": "{name} est en place. Vous pouvez entrer dans ce dossier depuis le menu du compte.",
+      "errorStepUp": "Confirmez votre deuxième facteur, puis réessayez.",
+      "errorOffline": "Cela n'a pas atteint le serveur. Rien n'a changé — vérifiez votre connexion et réessayez.",
+      "errorInvalid": "Le serveur a refusé ces informations. Vérifiez le nom, la date et le fuseau horaire.",
+      "errorFailed": "Le profil n'a pas pu être créé."
+    },
     "toast": {
       "savedTo": "Enregistré dans le dossier de {name}."
     },
diff --git a/messages/it.json b/messages/it.json
index e922a3689..e232ff48f 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -9642,6 +9642,29 @@
       "kindManaged": "Profilo gestito",
       "open": "Apri la cartella di {name}"
     },
+    "managed": {
+      "title": "Profili di cui ti occupi",
+      "description": "Cartelle sanitarie senza credenziali proprie.",
+      "explainer": "Un profilo gestito è una cartella sanitaria per qualcuno che non accede da sé — un bambino, o una persona di cui ti prendi cura. Non ha credenziali né indirizzo e-mail, e tu ne diventi la prima persona responsabile. Più avanti puoi aggiungerne altre, e ognuna può entrare nella cartella per tenerla aggiornata.",
+      "nameLabel": "Nome",
+      "namePlaceholder": "Il nome con cui riconoscerai questa cartella",
+      "nameHint": "Fino a 80 caratteri. Compare ovunque appaia questa cartella.",
+      "nameRequired": "Dai un nome alla cartella.",
+      "nameTooLong": "Questo nome supera gli 80 caratteri.",
+      "dobLabel": "Data di nascita (facoltativa)",
+      "dobHint": "Lascia il campo vuoto se preferisci non registrarla. Da un anno di nascita non si deduce nulla.",
+      "localeLabel": "Lingua di questa cartella",
+      "localeHint": "La lingua dei testi scritti in questa cartella. Le tue schermate restano nella tua lingua.",
+      "timezoneHint": "Il fuso in cui si contano le giornate di questa cartella.",
+      "timezoneInvalid": "Questo browser non conosce quel fuso orario.",
+      "create": "Crea profilo",
+      "creating": "Creazione in corso…",
+      "created": "{name} è pronto. Puoi entrare in quella cartella dal menu dell'account.",
+      "errorStepUp": "Conferma il tuo secondo fattore e riprova.",
+      "errorOffline": "Non è arrivato al server. Non è cambiato nulla — controlla la connessione e riprova.",
+      "errorInvalid": "Il server ha rifiutato questi dati. Controlla nome, data e fuso orario.",
+      "errorFailed": "Non è stato possibile creare il profilo."
+    },
     "toast": {
       "savedTo": "Salvato nella cartella di {name}."
     },
diff --git a/messages/pl.json b/messages/pl.json
index 1866ce06b..2dc6cf27c 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -9642,6 +9642,29 @@
       "kindManaged": "Zarządzany profil",
       "open": "Otwórz kartę użytkownika {name}"
     },
+    "managed": {
+      "title": "Profile, którymi się opiekujesz",
+      "description": "Karty zdrowia bez własnego logowania.",
+      "explainer": "Zarządzany profil to karta zdrowia osoby, która sama się nie loguje — dziecka albo kogoś, kim się opiekujesz. Nie ma logowania ani adresu e-mail, a Ty stajesz się pierwszą osobą opiekującą się profilem. Później możesz dodać kolejne, a każda z was może wejść do karty i ją uzupełniać.",
+      "nameLabel": "Nazwa",
+      "namePlaceholder": "Nazwa, po której rozpoznasz tę kartę",
+      "nameHint": "Do 80 znaków. Wyświetla się wszędzie tam, gdzie pojawia się ta karta.",
+      "nameRequired": "Nadaj karcie nazwę.",
+      "nameTooLong": "Ta nazwa ma więcej niż 80 znaków.",
+      "dobLabel": "Data urodzenia (opcjonalnie)",
+      "dobHint": "Zostaw puste, jeśli wolisz jej nie zapisywać. Z samego rocznika nic nie jest wyliczane.",
+      "localeLabel": "Język tej karty",
+      "localeHint": "Język tekstów zapisywanych w tej karcie. Twoje własne widoki pozostają w Twoim języku.",
+      "timezoneHint": "Strefa, w której liczone są dni tej karty.",
+      "timezoneInvalid": "Ta przeglądarka nie zna takiej strefy czasowej.",
+      "create": "Utwórz profil",
+      "creating": "Tworzenie…",
+      "created": "{name} jest gotowy. Do tej karty przejdziesz z menu konta.",
+      "errorStepUp": "Potwierdź drugi składnik logowania i spróbuj ponownie.",
+      "errorOffline": "To nie dotarło do serwera. Nic się nie zmieniło — sprawdź połączenie i spróbuj ponownie.",
+      "errorInvalid": "Serwer odrzucił te dane. Sprawdź nazwę, datę i strefę czasową.",
+      "errorFailed": "Nie udało się utworzyć profilu."
+    },
     "toast": {
       "savedTo": "Zapisano w karcie użytkownika {name}."
     },
diff --git a/src/components/settings/access-section.tsx b/src/components/settings/access-section.tsx
index 0925b34bb..bd2770182 100644
--- a/src/components/settings/access-section.tsx
+++ b/src/components/settings/access-section.tsx
@@ -3,6 +3,7 @@
 import { GrantInviteCard } from "@/components/settings/access/grant-invite-card";
 import { GrantsGivenCard } from "@/components/settings/access/grants-given-card";
 import { GrantsReceivedCard } from "@/components/settings/access/grants-received-card";
+import { ManagedProfileCard } from "@/components/settings/access/managed-profile-card";
 import { RecordActivityCard } from "@/components/settings/access/record-activity-card";
 
 /**
@@ -15,9 +16,18 @@ import { RecordActivityCard } from "@/components/settings/access/record-activity
  * somebody reads them:
  *
  *   1. Invite — the act.
- *   2. Who has access — the standing state, and the way to end it.
- *   3. What I can open — the same, from the other side.
- *   4. When it was opened — what actually happened.
+ *   2. Records you look after — the other act, and the one that CREATES a
+ *      record rather than opening one that already exists.
+ *   3. Who has access — the standing state, and the way to end it.
+ *   4. What I can open — the same, from the other side.
+ *   5. When it was opened — what actually happened.
+ *
+ * v1.37.0 put the managed-profile card second rather than in a settings area
+ * of its own. A managed profile is a record with no login, reachable only
+ * through the people who look after it — which is the same question this
+ * section already answers twice, from a third side. Splitting it out would
+ * have made "who may open which record" two half-answers on two pages, which
+ * is the settings-IA rule below in miniature.
  *
  * Distinct from Settings → "Health record" → sharing links, which mints a
  * time-boxed read-only link to a REPORT for a clinician. This section is about
@@ -35,6 +45,7 @@ export function AccessSection() {
   return (
     <div className="space-y-4">
       <GrantInviteCard />
+      <ManagedProfileCard />
       <GrantsGivenCard />
       <GrantsReceivedCard />
       <RecordActivityCard />
diff --git a/src/components/settings/access/__tests__/managed-profile-affordances.test.tsx b/src/components/settings/access/__tests__/managed-profile-affordances.test.tsx
new file mode 100644
index 000000000..2d616dc39
--- /dev/null
+++ b/src/components/settings/access/__tests__/managed-profile-affordances.test.tsx
@@ -0,0 +1,351 @@
+/**
+ * The managed-profile surface, from a static render.
+ *
+ * ## What an SSR render can prove here, and what it cannot
+ *
+ * It can prove that a control exists, that the sentence which qualifies it
+ * sits beside it in document order, that a list renders one row per profile,
+ * and — because the section is composed rather than routed — that the whole
+ * card is present for an owner and absent for a delegate. It CANNOT prove that
+ * what the form posts reaches the server: there is no click here, so the
+ * submit path never runs and every assertion below stays green with the form
+ * wired to a constant. That half belongs to `tests/integration/
+ * managed-profile-surface.test.ts` (the real routes) and to the browser
+ * journey in `e2e/v137-sharing-managed-profiles.spec.ts`.
+ *
+ * The unit environment is `node`: no jsdom, no testing-library. The pure
+ * exports (`displayNameIssue`, `createManagedProfileErrorKey`,
+ * `managedProfilesOf`) are where the decisions live, and they are pinned
+ * directly for that reason.
+ *
+ * ## The reachability legs are legs, not reasoning
+ *
+ * `/settings/access` is an ACTOR surface — grant management is the one thing a
+ * delegate must have no reach into — and `access` classifies `personal`, so
+ * the prediction is that a Guardian inside a profile and an adult MANAGE
+ * delegate both get the refusal panel instead. That is asserted rather than
+ * argued: `auth-shell.tsx` and `settings-shell.tsx` decide reachability above
+ * every component in this file, and Plan 13 shipped a destination that was
+ * admitted and unreachable because the prediction was not checked.
+ */
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+
+import { renderToStaticMarkup } from "react-dom/server";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import { I18nProvider } from "@/lib/i18n/context";
+import { ApiError } from "@/lib/api/api-fetch";
+import type { AccountAccessEntry } from "@/lib/sharing/account-access-view";
+import type { GrantList } from "@/lib/queries/use-account-grants";
+
+/** The account payload, as the cards under test read it. */
+const authRef: {
+  value: {
+    accounts: AccountAccessEntry[];
+    active: AccountAccessEntry | null;
+  };
+} = { value: { accounts: [], active: null } };
+
+vi.mock("@/hooks/use-auth", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("@/hooks/use-auth")>();
+  return {
+    ...actual,
+    useAuth: () => ({
+      user: {
+        id: "guardian",
+        username: "guardian",
+        timezone: "Europe/Berlin",
+        accountAccess: {
+          accounts: authRef.value.accounts,
+          active: authRef.value.active,
+          canSwitch: authRef.value.accounts.length > 0,
+        },
+      },
+      isLoading: false,
+      isAuthenticated: true,
+      isAuthUnknown: false,
+      error: null,
+      refetch: vi.fn(),
+    }),
+  };
+});
+
+function grantList(partial: Partial<GrantList> = {}): GrantList {
+  return { given: [], received: [], retentionDays: 365, ...partial };
+}
+
+vi.mock("@/lib/queries/use-account-grants", async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import("@/lib/queries/use-account-grants")>();
+  return {
+    ...actual,
+    useAccountGrants: () => ({
+      data: grantList(),
+      isLoading: false,
+      isError: false,
+      refetch: vi.fn(),
+    }),
+    useRecordActivity: () => ({
+      data: undefined,
+      isLoading: false,
+      isError: false,
+      refetch: vi.fn(),
+    }),
+    useInviteGrant: () => idle(),
+    useAcceptGrant: () => idle(),
+    useRevokeGrant: () => idle(),
+    useRenounceGrant: () => idle(),
+  };
+});
+
+vi.mock("@/lib/queries/use-managed-profiles", async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import("@/lib/queries/use-managed-profiles")>();
+  return { ...actual, useCreateManagedProfile: () => idle() };
+});
+
+vi.mock("@/hooks/use-account-switch", () => ({
+  useAccountSwitch: () => ({ mutate: vi.fn(), isPending: false }),
+}));
+
+function idle() {
+  return {
+    mutate: vi.fn(),
+    isPending: false,
+    isError: false,
+    error: null,
+    variables: undefined,
+  };
+}
+
+import { AccessSection } from "@/components/settings/access-section";
+import { RecordSettingsSectionGate } from "@/components/settings/record-settings-section-gate";
+import {
+  createManagedProfileErrorKey,
+  displayNameIssue,
+} from "../managed-profile-create-form";
+import { managedProfilesOf } from "../managed-profile-card";
+
+function render(node: React.ReactNode): string {
+  return renderToStaticMarkup(
+    <I18nProvider initialLocale="en">{node}</I18nProvider>,
+  );
+}
+
+/** The section as the settings page actually mounts it: behind the gate. */
+function renderGatedSection(): string {
+  return render(
+    <RecordSettingsSectionGate section="access">
+      <AccessSection />
+    </RecordSettingsSectionGate>,
+  );
+}
+
+function entry(partial: Partial<AccountAccessEntry> = {}): AccountAccessEntry {
+  return {
+    accountId: "p1",
+    username: "managed-abc",
+    displayName: "Managed record",
+    access: "write",
+    level: "manage",
+    recordKind: "managed",
+    sections: null,
+    canWrite: true,
+    ...partial,
+  };
+}
+
+beforeEach(() => {
+  authRef.value = { accounts: [], active: null };
+});
+
+describe("the managed-profile card, in the shared-access section", () => {
+  it("renders inside the section, after the invitation card", () => {
+    const html = renderGatedSection();
+    expect(html).toContain('data-slot="managed-profile-card"');
+    // Reading order: the invitation is the first act, this is the second, and
+    // the standing state of both follows. A card that drifted below the
+    // activity feed would still contain every string this file asserts.
+    expect(html.indexOf('data-slot="grant-invite-card"')).toBeLessThan(
+      html.indexOf('data-slot="managed-profile-card"'),
+    );
+    expect(html.indexOf('data-slot="managed-profile-card"')).toBeLessThan(
+      html.indexOf('data-slot="grants-given-card"'),
+    );
+  });
+
+  it("says the record has no login and that the creator looks after it", () => {
+    const html = renderGatedSection();
+    // The two facts somebody is consenting to. A rewrite that keeps the form
+    // and drops either sentence should fail here.
+    expect(html).toContain("It has no login and no e-mail address");
+    expect(html).toContain("you become its first guardian");
+  });
+
+  it("collects the four fields the route accepts and nothing else", () => {
+    const html = renderGatedSection();
+    for (const slot of [
+      "managed-profile-name",
+      "managed-profile-dob",
+      "managed-profile-locale",
+      "managed-profile-create-submit",
+    ]) {
+      expect(html, slot).toContain(`data-slot="${slot}"`);
+    }
+    // The timezone control is the shared picker, which labels itself.
+    expect(html).toContain('id="managed-profile-timezone"');
+    // Six languages offered, which is the route's enum exactly.
+    const options =
+      /<select[^>]*data-slot="managed-profile-locale"[\s\S]*?<\/select>/
+        .exec(html)?.[0]
+        .match(/<option/g) ?? [];
+    expect(options).toHaveLength(6);
+  });
+
+  it("lists the profiles this account looks after, and only those", () => {
+    authRef.value = {
+      accounts: [
+        entry(),
+        entry({
+          accountId: "a1",
+          username: "housemate",
+          displayName: "Jo",
+          recordKind: "shared",
+        }),
+      ],
+      active: null,
+    };
+    const html = renderGatedSection();
+    expect(html).toContain('data-managed-profile-id="p1"');
+    // An adult who shared their own record is not a profile anybody looks
+    // after, and offering a delete control for one would be the same mistake
+    // one level up.
+    expect(html).not.toContain('data-managed-profile-id="a1"');
+    expect(html.match(/data-slot="managed-profile-row"/g)).toHaveLength(1);
+  });
+});
+
+describe("who can reach the section at all", () => {
+  it("renders for an unswitched owner", () => {
+    const html = renderGatedSection();
+    expect(html).toContain('data-slot="managed-profile-card"');
+    expect(html).not.toContain("shared-record-settings-unavailable-title");
+  });
+
+  it("does not render for a Guardian inside the profile they look after", () => {
+    // Grant management is the one surface a delegate must have no reach into,
+    // and a Guardian acting AS the profile is a delegate for this purpose.
+    authRef.value = { accounts: [entry()], active: entry() };
+    const html = renderGatedSection();
+    expect(html).toContain("shared-record-settings-unavailable-title");
+    expect(html).not.toContain('data-slot="managed-profile-card"');
+    expect(html).not.toContain('data-slot="grant-invite-card"');
+  });
+
+  it("does not render for an adult delegate holding MANAGE", () => {
+    const adult = entry({
+      accountId: "a1",
+      username: "housemate",
+      displayName: "Jo",
+      recordKind: "shared",
+    });
+    authRef.value = { accounts: [adult], active: adult };
+    const html = renderGatedSection();
+    expect(html).toContain("shared-record-settings-unavailable-title");
+    expect(html).not.toContain('data-slot="managed-profile-card"');
+  });
+});
+
+describe("what the form decides before it sends", () => {
+  it("treats a whitespace-only name as empty, because the route does", () => {
+    // The route trims and then requires 1..80. A client that did not trim
+    // would offer to send a name the server reads as absent.
+    expect(displayNameIssue("   ")).toBe("recordSharing.managed.nameRequired");
+    expect(displayNameIssue("")).toBe("recordSharing.managed.nameRequired");
+    expect(displayNameIssue("  Managed record  ")).toBeNull();
+  });
+
+  it("holds the route's own 80-character bound", () => {
+    expect(displayNameIssue("x".repeat(80))).toBeNull();
+    expect(displayNameIssue("x".repeat(81))).toBe(
+      "recordSharing.managed.nameTooLong",
+    );
+    // And trailing space does not push a valid name over the edge.
+    expect(displayNameIssue(`${"x".repeat(80)}   `)).toBeNull();
+  });
+
+  it("routes the step-up gate to its own sentence, not to a failure", () => {
+    // Every route in this family resolves `requireFreshMfa`, so for anybody
+    // with a second factor this is the FIRST answer, not an error. Told as a
+    // failure it sends somebody looking for a problem with what they typed.
+    expect(
+      createManagedProfileErrorKey(
+        new ApiError("refused", 401, { errorCode: "auth.stepup.required" }),
+      ),
+    ).toBe("recordSharing.managed.errorStepUp");
+    expect(createManagedProfileErrorKey(new ApiError("refused", 422))).toBe(
+      "recordSharing.managed.errorInvalid",
+    );
+    expect(createManagedProfileErrorKey(new ApiError("refused", 500))).toBe(
+      "recordSharing.managed.errorFailed",
+    );
+    // Not an `ApiError` means no response came back at all.
+    expect(createManagedProfileErrorKey(new TypeError("Failed to fetch"))).toBe(
+      "recordSharing.managed.errorOffline",
+    );
+    // The four are distinct, so a resolver returning one key for everything
+    // fails here rather than passing each row above by accident.
+    expect(
+      new Set(
+        [401, 422, 500].map((s) =>
+          createManagedProfileErrorKey(new ApiError("refused", s)),
+        ),
+      ).size,
+    ).toBe(3);
+  });
+
+  it("keeps a refused creation's fields, and clears them only on success", () => {
+    // A static render cannot press the button, so the claim is made about the
+    // code path: every reset lives inside `onSuccess`. A reset that migrated
+    // into `onError` would wipe a typed name on a failure the person is being
+    // asked to retry.
+    const source = readForm();
+    const start = source.indexOf("onSuccess:");
+    const split = source.indexOf("onError:", start);
+    expect(start).toBeGreaterThan(-1);
+    expect(split).toBeGreaterThan(start);
+    const onSuccess = source.slice(start, split);
+    const onError = source.slice(split);
+    expect(onSuccess).toContain("setCreated");
+    expect(onError).toContain("createManagedProfileErrorKey");
+    for (const reset of [
+      'setDisplayName("")',
+      'setDateOfBirth("")',
+      "setLocale(actorLocale)",
+      "setTimezone(browserTimezone())",
+    ]) {
+      expect(onSuccess, reset).toContain(reset);
+      expect(onError, reset).not.toContain(reset);
+    }
+  });
+});
+
+describe("which accounts count as profiles looked after", () => {
+  it("keeps the managed entries and drops the rest", () => {
+    const managed = entry();
+    const shared = entry({ accountId: "a1", recordKind: "shared" });
+    expect(managedProfilesOf([managed, shared])).toEqual([managed]);
+    expect(managedProfilesOf(undefined)).toEqual([]);
+  });
+});
+
+function readForm(): string {
+  return readFileSync(
+    join(
+      process.cwd(),
+      "src/components/settings/access/managed-profile-create-form.tsx",
+    ),
+    "utf8",
+  );
+}
diff --git a/src/components/settings/access/managed-profile-card.tsx b/src/components/settings/access/managed-profile-card.tsx
new file mode 100644
index 000000000..73d220b33
--- /dev/null
+++ b/src/components/settings/access/managed-profile-card.tsx
@@ -0,0 +1,107 @@
+"use client";
+
+import { UserRoundCog } from "lucide-react";
+
+import { ManagedProfileCreateForm } from "@/components/settings/access/managed-profile-create-form";
+import { SettingsCard } from "@/components/settings/settings-card";
+import { SettingsCardHeader } from "@/components/settings/_card-header";
+import { useAuth } from "@/hooks/use-auth";
+import { useTranslations } from "@/lib/i18n/context";
+import {
+  accountLabel,
+  type AccountAccessEntry,
+} from "@/lib/sharing/account-access-view";
+
+/**
+ * v1.37.0 — the records this account looks after.
+ *
+ * ## Why the list is not a read of its own
+ *
+ * There is no `GET /api/managed-profiles`, and there does not need to be. A
+ * Guardian's relationship to a managed profile IS a MANAGE grant with the
+ * profile as grantor, so the profiles somebody looks after are already on
+ * `GET /api/auth/me` as the `managed` entries of `accountAccess.accounts` —
+ * the same list that paints the switcher. Reading them from anywhere else
+ * would be a second answer to a question the account payload already answers,
+ * and the two would disagree the first time a grant lapsed.
+ *
+ * It is also what makes the creation contract simple to state: the new profile
+ * appears here, in the switcher and in the banner from ONE invalidation, and
+ * if the account payload is not refreshed it appears in none of them.
+ *
+ * ## Why this card, in this section
+ *
+ * The section's docblock states the rule — one concept, one section — and this
+ * is the same concept from the third side: who can open a record. Two of the
+ * cards here are about another adult opening yours or you opening theirs; this
+ * one is about a record that exists only because somebody looks after it. A
+ * settings area of its own would split "who may open which record" across two
+ * pages, which is the split that rule exists to prevent.
+ *
+ * It sits directly after the invitation card because both are acts, and this
+ * one creates the record the other two then talk about.
+ */
+export function ManagedProfileCard() {
+  const { t } = useTranslations();
+  const { user } = useAuth();
+  const profiles = managedProfilesOf(user?.accountAccess?.accounts);
+
+  return (
+    <SettingsCard data-slot="managed-profile-card">
+      <SettingsCardHeader
+        icon={UserRoundCog}
+        title={t("recordSharing.managed.title")}
+        description={t("recordSharing.managed.description")}
+      />
+      <div className="mt-4 space-y-4">
+        {/* Content, not meta: this is what somebody is consenting to take on,
+            and UI-STANDARDS §3 reserves muted for the incidental. */}
+        <p data-slot="managed-profile-explainer" className="text-sm">
+          {t("recordSharing.managed.explainer")}
+        </p>
+
+        {profiles.length > 0 && (
+          <ul data-slot="managed-profile-list" className="divide-y">
+            {profiles.map((profile) => (
+              <li
+                key={profile.accountId}
+                data-slot="managed-profile-row"
+                data-managed-profile-id={profile.accountId}
+                className="py-3 first:pt-0 last:pb-0"
+              >
+                {/* UI-STANDARDS §11 inline action row. */}
+                <div className="flex items-start justify-between gap-3">
+                  <div className="min-w-0 flex-1">
+                    {/* A person's name is user data and stays content. */}
+                    <p className="truncate text-sm font-medium">
+                      {accountLabel(profile)}
+                    </p>
+                    <p className="text-muted-foreground truncate text-xs">
+                      {t("recordSharing.lookingAfter.kindManaged")}
+                    </p>
+                  </div>
+                </div>
+              </li>
+            ))}
+          </ul>
+        )}
+
+        <ManagedProfileCreateForm />
+      </div>
+    </SettingsCard>
+  );
+}
+
+/**
+ * The managed entries of the account payload, in the order the server sent
+ * them.
+ *
+ * Exported and pure so the filter can be pinned: `recordKind` is server-
+ * resolved presentation metadata, and a card that showed every shared record
+ * here would offer a delete control for an adult's own account.
+ */
+export function managedProfilesOf(
+  accounts: AccountAccessEntry[] | undefined,
+): AccountAccessEntry[] {
+  return (accounts ?? []).filter((entry) => entry.recordKind === "managed");
+}
diff --git a/src/components/settings/access/managed-profile-create-form.tsx b/src/components/settings/access/managed-profile-create-form.tsx
new file mode 100644
index 000000000..d28fbf5fe
--- /dev/null
+++ b/src/components/settings/access/managed-profile-create-form.tsx
@@ -0,0 +1,287 @@
+"use client";
+
+import { useState } from "react";
+
+import { Button } from "@/components/ui/button";
+import { DateField } from "@/components/ui/date-field";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { NativeSelect } from "@/components/ui/native-select";
+import { TimezonePicker } from "@/components/settings/timezone-picker";
+import { ApiError } from "@/lib/api/api-fetch";
+import { locales, localeLabels, type Locale } from "@/lib/i18n/config";
+import { useTranslations } from "@/lib/i18n/context";
+import { useCreateManagedProfile } from "@/lib/queries/use-managed-profiles";
+import {
+  DEFAULT_TIMEZONE,
+  detectBrowserTimezone,
+  isValidTimezone,
+} from "@/lib/tz/format";
+
+/**
+ * v1.37.0 — creating a record that has no login of its own.
+ *
+ * ## Why the form is exactly four fields
+ *
+ * `POST /api/managed-profiles` parses with a `.strict()` schema. A strict
+ * schema refuses an extra key outright, so a form that helpfully posted an
+ * empty `heightCm` — or a `gender` somebody thought would be useful — is
+ * refused with a validation error about a field the person never filled in.
+ * The four fields below are the schema, and the submit handler names them one
+ * by one rather than spreading the form state, so a fifth control cannot reach
+ * the wire by accident.
+ *
+ * ## The date of birth is genuinely optional
+ *
+ * Not "optional but we will guess". A managed profile is frequently a child,
+ * and a child's age changes what the product says about a reading — so the
+ * temptation to synthesise a date from a birth year, or from an age, is real
+ * and is refused here as it is in the route. An absent date of birth stays
+ * absent, and everything downstream reads it as absent rather than as
+ * "1 January of some year".
+ *
+ * ## Whose locale, and whose timezone
+ *
+ * The profile's locale is a property OF THE RECORD: it decides the language of
+ * content generated for it. The chrome around this form stays in the actor's
+ * language, which is a decision made elsewhere and is not re-litigated in the
+ * copy here. The default is the actor's own language, because a record created
+ * by a German speaker for a person in their household is overwhelmingly likely
+ * to want German, and the control is right there for the case where it is not.
+ *
+ * The timezone defaults to the browser's, for the same reason and with less
+ * ambiguity: the profile lives where the person creating it lives, until told
+ * otherwise.
+ *
+ * ## The step-up is the expected first answer
+ *
+ * Every route in this family resolves `requireFreshMfa`. For anybody with a
+ * second factor who has not proved it in the last few minutes, the FIRST
+ * response to this form is a 401 carrying `auth.stepup.required` — not an
+ * error, a gate. It gets its own sentence naming the next step, exactly as the
+ * invitation form does, rather than the generic "could not be created", which
+ * would send somebody looking for a problem with what they typed.
+ */
+export function ManagedProfileCreateForm() {
+  const { t, locale: actorLocale } = useTranslations();
+  const create = useCreateManagedProfile();
+
+  const [displayName, setDisplayName] = useState("");
+  const [dateOfBirth, setDateOfBirth] = useState("");
+  const [locale, setLocale] = useState<Locale>(actorLocale);
+  const [timezone, setTimezone] = useState(() => browserTimezone());
+  const [error, setError] = useState<string | null>(null);
+  const [created, setCreated] = useState<string | null>(null);
+
+  const trimmedName = displayName.trim();
+  const nameIssue = displayNameIssue(displayName);
+  const timezoneIssue = isValidTimezone(timezone)
+    ? null
+    : "recordSharing.managed.timezoneInvalid";
+  const blocked = nameIssue !== null || timezoneIssue !== null;
+
+  const submit = (event: React.FormEvent) => {
+    event.preventDefault();
+    if (blocked || create.isPending) return;
+    setError(null);
+    setCreated(null);
+    create.mutate(
+      {
+        displayName: trimmedName,
+        // Empty means absent. `null` is sent rather than the key being
+        // omitted, so "this record has no date of birth" is something the
+        // client says out loud.
+        dateOfBirth: dateOfBirth.length > 0 ? dateOfBirth : null,
+        locale,
+        timezone,
+      },
+      {
+        onSuccess: (profile) => {
+          setDisplayName("");
+          setDateOfBirth("");
+          setLocale(actorLocale);
+          setTimezone(browserTimezone());
+          setCreated(profile.displayName);
+        },
+        // Nothing is cleared here, on purpose: a refused creation is one the
+        // person is being asked to retry, and a form that emptied itself
+        // would make them type it all again to find out whether the second
+        // attempt fails the same way.
+        onError: (err) => setError(t(createManagedProfileErrorKey(err))),
+      },
+    );
+  };
+
+  return (
+    <form
+      onSubmit={submit}
+      data-slot="managed-profile-create-form"
+      className="space-y-3"
+    >
+      <div className="space-y-1.5">
+        <Label htmlFor="managed-profile-name">
+          {t("recordSharing.managed.nameLabel")}
+        </Label>
+        <Input
+          id="managed-profile-name"
+          data-slot="managed-profile-name"
+          value={displayName}
+          onChange={(e) => {
+            setDisplayName(e.target.value);
+            setError(null);
+          }}
+          placeholder={t("recordSharing.managed.namePlaceholder")}
+          autoComplete="off"
+          maxLength={80}
+          aria-invalid={
+            displayName.length > 0 && nameIssue !== null ? "true" : undefined
+          }
+          aria-describedby="managed-profile-name-hint"
+        />
+        <p
+          id="managed-profile-name-hint"
+          data-slot="managed-profile-name-hint"
+          className="text-muted-foreground text-xs"
+        >
+          {displayName.length > 0 && nameIssue !== null
+            ? t(nameIssue)
+            : t("recordSharing.managed.nameHint")}
+        </p>
+      </div>
+
+      <div className="space-y-1.5">
+        <Label htmlFor="managed-profile-dob">
+          {t("recordSharing.managed.dobLabel")}
+        </Label>
+        <DateField
+          id="managed-profile-dob"
+          data-slot="managed-profile-dob"
+          data-testid="managed-profile-dob-input"
+          value={dateOfBirth}
+          onChange={setDateOfBirth}
+          aria-describedby="managed-profile-dob-hint"
+        />
+        <p
+          id="managed-profile-dob-hint"
+          className="text-muted-foreground text-xs"
+        >
+          {t("recordSharing.managed.dobHint")}
+        </p>
+      </div>
+
+      <div className="space-y-1.5">
+        <Label htmlFor="managed-profile-locale">
+          {t("recordSharing.managed.localeLabel")}
+        </Label>
+        <NativeSelect
+          id="managed-profile-locale"
+          data-slot="managed-profile-locale"
+          className="w-full"
+          value={locale}
+          onChange={(e) => setLocale(e.target.value as Locale)}
+        >
+          {locales.map((option) => (
+            <option key={option} value={option}>
+              {localeLabels[option]}
+            </option>
+          ))}
+        </NativeSelect>
+        <p className="text-muted-foreground text-xs">
+          {t("recordSharing.managed.localeHint")}
+        </p>
+      </div>
+
+      <TimezonePicker
+        id="managed-profile-timezone"
+        value={timezone}
+        onChange={(next) => {
+          setTimezone(next);
+          setError(null);
+        }}
+        // The picker's own list comes from the engine, so the select branch
+        // cannot produce an unknown zone. Its free-text fallback (older
+        // engines without `Intl.supportedValuesOf`) can, and the submit button
+        // is inert for one — so the hint slot says why rather than leaving a
+        // dead button with no explanation beside it.
+        hint={t(timezoneIssue ?? "recordSharing.managed.timezoneHint")}
+      />
+
+      <Button
+        type="submit"
+        data-slot="managed-profile-create-submit"
+        disabled={create.isPending || blocked}
+      >
+        {create.isPending
+          ? t("recordSharing.managed.creating")
+          : t("recordSharing.managed.create")}
+      </Button>
+
+      {error && (
+        <p
+          role="alert"
+          data-slot="managed-profile-create-error"
+          className="text-destructive text-sm"
+        >
+          {error}
+        </p>
+      )}
+      {created && (
+        <p
+          role="status"
+          data-slot="managed-profile-created"
+          className="text-sm"
+        >
+          {t("recordSharing.managed.created", { name: created })}
+        </p>
+      )}
+    </form>
+  );
+}
+
+/** The browser's zone, or the app default when the engine will not say. */
+function browserTimezone(): string {
+  const detected = detectBrowserTimezone();
+  return isValidTimezone(detected) ? detected : DEFAULT_TIMEZONE;
+}
+
+/**
+ * The route's own bound on the display name, checked before sending.
+ *
+ * Exported and pure so the bound can be pinned without a click. The route
+ * trims and then requires 1..80, so the client trims first too: a name of
+ * three spaces is empty to the server and must read as empty here, rather
+ * than as a valid entry that comes back refused.
+ */
+export function displayNameIssue(value: string): string | null {
+  const trimmed = value.trim();
+  if (trimmed.length === 0) return "recordSharing.managed.nameRequired";
+  if (trimmed.length > 80) return "recordSharing.managed.nameTooLong";
+  return null;
+}
+
+/**
+ * The message for a refused creation.
+ *
+ * Four arms and each names a different next step. The step-up arm is the one
+ * that matters: it is not a failure, it is the gate every route in this family
+ * carries, and it is the answer most people will get the first time they use
+ * this form in a session.
+ *
+ * A 422 gets its own sentence rather than the field-level list the server
+ * actually sends. The multi-issue envelope rides `details.issues`, and the
+ * client's fetch wrapper keeps only `meta` — so the issues do not reach the
+ * browser at all. The form validates the same bounds the route does before it
+ * sends anything, which makes a 422 a disagreement between the two rather than
+ * something the person typed; saying so is more honest than inventing a
+ * field-level message the server did not send. Recorded as a finding in
+ * `02-13.1-CONTRACT-FINDINGS.md`.
+ */
+export function createManagedProfileErrorKey(err: unknown): string {
+  if (!(err instanceof ApiError)) return "recordSharing.managed.errorOffline";
+  // The step-up gate. `requireFreshMfa` throws `StepUpRequiredError`, which is
+  // a 401 carrying a stable code, and the request was authenticated enough to
+  // reach it — so this is never a lapsed session.
+  if (err.status === 401) return "recordSharing.managed.errorStepUp";
+  if (err.status === 422) return "recordSharing.managed.errorInvalid";
+  return "recordSharing.managed.errorFailed";
+}
diff --git a/src/lib/queries/__tests__/managed-profiles-invalidation.test.ts b/src/lib/queries/__tests__/managed-profiles-invalidation.test.ts
new file mode 100644
index 000000000..60dc12261
--- /dev/null
+++ b/src/lib/queries/__tests__/managed-profiles-invalidation.test.ts
@@ -0,0 +1,156 @@
+/**
+ * A created managed profile reaches the switcher.
+ *
+ * ## The claim, and why it is not "the mutation calls invalidate"
+ *
+ * The list of profiles somebody looks after is not a read of its own. It is
+ * `accountAccess.accounts` on `GET /api/auth/me`, filtered to the managed
+ * entries — the same block that paints the account switcher and the shared-
+ * record banner. So "the new profile appears without a reload" is exactly one
+ * property: the account payload comes back invalidated when the creation
+ * succeeds. A mutation that refreshed the sharing panel and not the payload
+ * would leave the profile invisible in the card, in the switcher and in the
+ * banner at once, and nothing on screen would say a read was stale.
+ *
+ * That claim can only be answered by a real `QueryClient` with the reads in
+ * it, so the hook's success handler is driven against one. `@tanstack/react-
+ * query` is mocked down to the two functions the hook body calls, which is
+ * what lets the body run outside React: the unit environment is `node`, there
+ * is no jsdom and no testing-library in this repo.
+ *
+ * Mutation check, run: point `invalidateManagedProfileReads` at the grant list
+ * alone and "refreshes the account payload" goes red while every other leg
+ * here stays green.
+ */
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { QueryClient } from "@tanstack/react-query";
+
+import { QUERY_CLIENT_DEFAULT_OPTIONS } from "@/lib/pwa/query-client-options";
+import { queryKeys } from "@/lib/query-keys";
+import { __resetRecordScopeForTests } from "@/lib/query-keys/record-scope";
+
+/** The client the mocked `useQueryClient` hands back. Reassigned per case. */
+const clientRef: { value: QueryClient } = { value: seeded() };
+
+vi.mock("@tanstack/react-query", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("@tanstack/react-query")>();
+  return {
+    ...actual,
+    // The hook body is what is under test, so the two hooks it calls are
+    // replaced by the smallest things that let it run: one that records the
+    // options object, one that hands over a real client.
+    useMutation: (options: unknown) => options,
+    useQueryClient: () => clientRef.value,
+  };
+});
+
+import {
+  invalidateManagedProfileReads,
+  useCreateManagedProfile,
+} from "@/lib/queries/use-managed-profiles";
+
+function seeded(): QueryClient {
+  const client = new QueryClient({
+    defaultOptions: QUERY_CLIENT_DEFAULT_OPTIONS,
+  });
+  client.setQueryData(queryKeys.accountGrants(), {
+    given: [],
+    received: [],
+    retentionDays: 365,
+  });
+  client.setQueryData(queryKeys.accountActivity(), {
+    entries: [],
+    retentionDays: 365,
+    truncated: false,
+  });
+  client.setQueryData(queryKeys.authMe(), { id: "guardian" });
+  client.setQueryData(queryKeys.managedProfileGuardians("p1"), []);
+  return client;
+}
+
+function invalidated(client: QueryClient, key: readonly unknown[]): boolean {
+  return (
+    client.getQueryCache().find({ queryKey: key })?.state.isInvalidated === true
+  );
+}
+
+beforeEach(() => {
+  __resetRecordScopeForTests();
+  clientRef.value = seeded();
+});
+
+describe("what a managed-profile change refreshes", () => {
+  it("starts from four live, valid entries", () => {
+    // Non-zero proof. Without it a client that failed to seed and a client
+    // whose entries were all invalidated read identically below: every
+    // `find()` returns undefined and each assertion becomes a quiet
+    // `undefined !== true`.
+    const all = clientRef.value.getQueryCache().getAll();
+    expect(all).toHaveLength(4);
+    expect(all.every((q) => q.state.isInvalidated)).toBe(false);
+  });
+
+  it("refreshes the account payload, which carries the switcher", () => {
+    invalidateManagedProfileReads(clientRef.value);
+    expect(invalidated(clientRef.value, queryKeys.authMe())).toBe(true);
+  });
+
+  it("refreshes the grant list and the record-activity feed", () => {
+    invalidateManagedProfileReads(clientRef.value);
+    expect(invalidated(clientRef.value, queryKeys.accountGrants())).toBe(true);
+    expect(invalidated(clientRef.value, queryKeys.accountActivity())).toBe(
+      true,
+    );
+  });
+
+  it("refreshes a profile's guardian roster through the family prefix", () => {
+    // Accepting a Guardian invitation is an ordinary grant accept, and it
+    // moves a row on a roster that endpoint knows nothing about. The prefix is
+    // what keeps the two in step.
+    invalidateManagedProfileReads(clientRef.value);
+    expect(
+      invalidated(clientRef.value, queryKeys.managedProfileGuardians("p1")),
+    ).toBe(true);
+  });
+});
+
+describe("the creation hook, driven for real", () => {
+  it("posts the four fields the strict schema accepts, and no others", async () => {
+    const options = useCreateManagedProfile() as unknown as {
+      mutationFn: (input: unknown) => Promise<unknown>;
+      onSuccess: () => void;
+    };
+    const fetchSpy = vi.spyOn(globalThis, "fetch").mockResolvedValue(
+      new Response(JSON.stringify({ data: { id: "p9" }, error: null }), {
+        status: 201,
+        headers: { "content-type": "application/json" },
+      }),
+    );
+
+    await options.mutationFn({
+      displayName: "Managed record",
+      dateOfBirth: null,
+      locale: "en",
+      timezone: "Europe/Berlin",
+    });
+
+    const [path, init] = fetchSpy.mock.calls[0] as [string, RequestInit];
+    expect(path).toBe("/api/managed-profiles");
+    expect(init.method).toBe("POST");
+    expect(Object.keys(JSON.parse(String(init.body))).sort()).toEqual([
+      "dateOfBirth",
+      "displayName",
+      "locale",
+      "timezone",
+    ]);
+    fetchSpy.mockRestore();
+  });
+
+  it("puts the new profile in the switcher by refreshing the payload", () => {
+    const options = useCreateManagedProfile() as unknown as {
+      onSuccess: () => void;
+    };
+    options.onSuccess();
+    expect(invalidated(clientRef.value, queryKeys.authMe())).toBe(true);
+  });
+});
diff --git a/src/lib/queries/use-managed-profiles.ts b/src/lib/queries/use-managed-profiles.ts
new file mode 100644
index 000000000..b0f7d1f03
--- /dev/null
+++ b/src/lib/queries/use-managed-profiles.ts
@@ -0,0 +1,98 @@
+"use client";
+
+/**
+ * v1.37.0 — the reads and writes behind the managed-profile surface.
+ *
+ * A managed profile is a record with no login of its own. It is created by the
+ * person who will look after it, and from that moment it exists only through
+ * its Guardians — which is why every call here refreshes the ACCOUNT payload
+ * and not merely the panel it was fired from.
+ *
+ * That is the one property worth stating up front. The list of profiles a
+ * Guardian looks after is not a read of its own: it is `accountAccess.accounts`
+ * on `GET /api/auth/me`, filtered to the managed entries, because the Guardian's
+ * relationship to the profile IS a MANAGE grant. So a creation that refreshed
+ * the sharing panel and not the payload would leave the new profile invisible —
+ * in the switcher, in the banner, and in this card — until the next boot. Every
+ * mutation below therefore goes through `invalidateGrantReads`, the one entry
+ * `use-account-grants.ts` already publishes for exactly this fan-out; the
+ * managed-profile family rides it as a key prefix rather than as a second
+ * invalidation path (`grantDependentKeys`).
+ */
+
+import {
+  useMutation,
+  useQueryClient,
+  type QueryClient,
+} from "@tanstack/react-query";
+
+import { apiPost } from "@/lib/api/api-fetch";
+import { queryKeys } from "@/lib/query-keys";
+import { invalidateGrantReads } from "@/lib/queries/use-account-grants";
+import type { Locale } from "@/lib/i18n/config";
+
+/**
+ * Exactly the body `POST /api/managed-profiles` accepts.
+ *
+ * The route's schema is `.strict()`, so an extra key is a 422 with nothing
+ * useful in it — a form that helpfully posted an empty `heightCm` would be
+ * refused for a field the person never saw. Naming the four fields as a type
+ * rather than passing the form state through is what stops that: a fifth field
+ * added to the form cannot reach the wire without somebody deciding it should.
+ */
+export interface CreateManagedProfileInput {
+  displayName: string;
+  /** ISO `yyyy-MM-dd`, or null. Never synthesised from a year. */
+  dateOfBirth: string | null;
+  locale: Locale;
+  /** IANA zone name. */
+  timezone: string;
+}
+
+/** What the create route answers with. */
+export interface ManagedProfileCreated {
+  id: string;
+  displayName: string;
+  dateOfBirth: string | null;
+  locale: string;
+  timezone: string;
+  recordKind: "managed";
+}
+
+/**
+ * Everything a managed-profile lifecycle change makes stale.
+ *
+ * Exported as a plain function over a `QueryClient` for the same reason
+ * `invalidateGrantReads` is: a test can hand it a real client, seed the reads
+ * and check they came back invalidated. "The mutation calls invalidate" is a
+ * claim about the source; "the account payload comes back invalidated" is the
+ * claim that decides whether the new profile appears in the switcher.
+ */
+export function invalidateManagedProfileReads(queryClient: QueryClient): void {
+  invalidateGrantReads(queryClient);
+}
+
+/** The same refresh, bound to the mounted client. */
+function useInvalidateManagedProfiles() {
+  const queryClient = useQueryClient();
+  return () => invalidateManagedProfileReads(queryClient);
+}
+
+/**
+ * Create a record somebody looks after.
+ *
+ * `requireFreshMfa` guards the route, so a 401 carrying
+ * `meta.errorCode: auth.stepup.required` is the EXPECTED first answer for
+ * anybody who has a second factor and has not proved it recently. The form
+ * routes that into the app's re-verification path rather than into a generic
+ * failure — see `managed-profile-create-form.tsx`.
+ */
+export function useCreateManagedProfile() {
+  const invalidate = useInvalidateManagedProfiles();
+  return useMutation({
+    mutationKey: queryKeys.managedProfileCreate(),
+    mutationFn: (input: CreateManagedProfileInput) =>
+      apiPost<ManagedProfileCreated>("/api/managed-profiles", input),
+    onSuccess: invalidate,
+  });
+}
diff --git a/src/lib/query-keys/index.ts b/src/lib/query-keys/index.ts
index d73047d8b..578df7a9d 100644
--- a/src/lib/query-keys/index.ts
+++ b/src/lib/query-keys/index.ts
@@ -81,11 +81,20 @@ export { recordSettingsKeys } from "./record-settings";
  * and the banner. A revoke that refreshed the panel but not the payload would
  * leave a switcher entry pointing at a record the server had just closed: the
  * affordance still on screen, the click already refused.
+ *
+ * v1.37.0 — the managed-profile family joins the bundle as a prefix. A
+ * Guardian invitation is accepted through the ordinary
+ * `POST /api/account/grants/{id}/accept`, and that acceptance moves a row on a
+ * roster the accept route knows nothing about: the invitee stops being PENDING
+ * and starts counting toward the last-Guardian floor. Listing the prefix here
+ * keeps the roster in step with the act that changed it, rather than asking
+ * every future grant transition to remember one more read.
  */
 export const grantDependentKeys = [
   queryKeys.accountGrants(),
   queryKeys.accountActivity(),
   queryKeys.authMe(),
+  queryKeys.managedProfiles(),
 ];
 
 /**
diff --git a/src/lib/query-keys/sharing.ts b/src/lib/query-keys/sharing.ts
index 7673b585d..95b0f4493 100644
--- a/src/lib/query-keys/sharing.ts
+++ b/src/lib/query-keys/sharing.ts
@@ -28,10 +28,38 @@ export const sharingKeys = {
    */
   accountActivity: () => ["account", "activity"] as const,
 
+  /**
+   * v1.37.0 — the managed-profile family, as one prefix.
+   *
+   * Present so a grant transition can invalidate the whole family at once:
+   * accepting a Guardian invitation is an ordinary `POST
+   * /api/account/grants/{id}/accept`, and it moves a row on a roster that
+   * endpoint knows nothing about. Listing this prefix in `grantDependentKeys`
+   * is what keeps the two in step without the accept path having to know a
+   * managed profile exists.
+   */
+  managedProfiles: () => ["managed-profiles"] as const,
+
+  /**
+   * Who looks after one managed profile (`GET
+   * /api/managed-profiles/{id}/guardians`). Keyed by profile because a
+   * Guardian may look after more than one, and a single key for all of them
+   * would be the same-key-different-shape collision the factory exists to
+   * prevent.
+   */
+  managedProfileGuardians: (profileId: string) =>
+    ["managed-profiles", profileId, "guardians"] as const,
+
   /** Mutation keys — kept in the factory so no bare array reaches a call site. */
   accountGrantInvite: () => ["account", "grants", "invite"] as const,
   accountGrantAccept: () => ["account", "grants", "accept"] as const,
   accountGrantRevoke: () => ["account", "grants", "revoke"] as const,
   accountGrantRenounce: () => ["account", "grants", "renounce"] as const,
   accountSwitchMutation: () => ["account", "switch"] as const,
+  managedProfileCreate: () => ["managed-profiles", "create"] as const,
+  managedProfileDelete: () => ["managed-profiles", "delete"] as const,
+  managedProfileGuardianInvite: () =>
+    ["managed-profiles", "guardian", "invite"] as const,
+  managedProfileGuardianRemove: () =>
+    ["managed-profiles", "guardian", "remove"] as const,
 };