diff --git a/src/stores/wallet.lifecycle.test.ts b/src/stores/wallet.lifecycle.test.ts
new file mode 100644
index 0000000..b33f3f5
--- /dev/null
+++ b/src/stores/wallet.lifecycle.test.ts
@@ -0,0 +1,6 @@
+import './wallet.lifecycle.activation.cases';
+import './wallet.lifecycle.teardown.cases';
+import './wallet.lifecycle.lockFailure.cases';
+import './wallet.lifecycle.isolation.cases';
+import './wallet.lifecycle.invalidation.cases';
+import './wallet.lifecycle.backupOwner.cases';
diff --git a/src/stores/wallet.lifecycle.testHarness.ts b/src/stores/wallet.lifecycle.testHarness.ts
new file mode 100644
index 0000000..7613923
--- /dev/null
+++ b/src/stores/wallet.lifecycle.testHarness.ts
@@ -0,0 +1,122 @@
+import { createPinia, setActivePinia } from 'pinia';
+import { beforeEach, vi } from 'vitest';
+
+import { encryptSecretParts, linkingPubKeyHex } from '@/lnurlcash/keys';
+import type * as NwcExports from '@/lnurlcash/nwc';
+import type * as NostrBackupExports from '@/lnurlcash/nostrBackup';
+import { stubLocalStorage } from '@/lnurlcash/test-utils';
+import { lifecycleMocks } from './wallet.lifecycle.testMocks';
+
+export { lifecycleMocks as mocks } from './wallet.lifecycle.testMocks';
+
+vi.mock('@/capabilities/biometricUnlock', async () => {
+  const { lifecycleMocks } = await import('./wallet.lifecycle.testMocks');
+  return {
+    disableBiometricUnlock: lifecycleMocks.disableBiometricUnlock,
+    unlockWithBiometrics: vi.fn(),
+  };
+});
+
+vi.mock('@/lnurlcash/nwc', async (importOriginal) => {
+  const { lifecycleMocks } = await import('./wallet.lifecycle.testMocks');
+  const actual = await importOriginal<typeof NwcExports>();
+  return { ...actual, startService: lifecycleMocks.startService };
+});
+
+vi.mock('@/lnurlcash/nostrBackup', async (importOriginal) => {
+  const { lifecycleMocks } = await import('./wallet.lifecycle.testMocks');
+  const actual = await importOriginal<typeof NostrBackupExports>();
+  return { ...actual, restoreFromNostr: lifecycleMocks.restoreFromNostr };
+});
+
+export const LINKING_KEY = new Uint8Array(32).fill(7);
+export const OTHER_LINKING_KEY = new Uint8Array(32).fill(9);
+export const OWNER_ID = linkingPubKeyHex(LINKING_KEY);
+export const OTHER_OWNER_ID = linkingPubKeyHex(OTHER_LINKING_KEY);
+export const PASSWORD = 'correct horse battery staple';
+export const MINT_KEY = '02' + 'aa'.repeat(32);
+
+export const encryptedLinkingKeyRecord = async () => {
+  const parts = await encryptSecretParts(
+    Array.from(LINKING_KEY, (byte) => byte.toString(16).padStart(2, '0')).join(''),
+    PASSWORD,
+  );
+  return { enc: true as const, ...parts };
+};
+
+type Deferred = {
+  readonly promise: Promise<void>;
+  readonly resolve: () => void;
+};
+
+export const deferred = (): Deferred => {
+  let resolvePromise: (() => void) | undefined;
+  const promise = new Promise<void>((resolve) => {
+    resolvePromise = resolve;
+  });
+  return {
+    promise,
+    resolve: () => resolvePromise?.(),
+  };
+};
+
+export const installLegacyOwnerlessResidue = (): void => {
+  localStorage.setItem(
+    'sattle_passkey_slots',
+    JSON.stringify([
+      {
+        credentialId: '11'.repeat(16),
+        hkdfSalt: '22'.repeat(16),
+        iv: '33'.repeat(12),
+        wrappedKey: '44'.repeat(48),
+        createdAt: 1,
+      },
+    ]),
+  );
+  localStorage.setItem(
+    'sattle_nwc_connections',
+    JSON.stringify([
+      {
+        clientPubkey: '55'.repeat(32),
+        relays: ['wss://relay.example'],
+        budget: { maxMsat: 1000, periodMs: 60_000 },
+        spent: { periodStart: 0, msat: 0 },
+        createdAt: 1,
+      },
+    ]),
+  );
+  localStorage.setItem('sattle_nwc_enabled', 'true');
+  localStorage.setItem(
+    'sattle_trusted_mints',
+    JSON.stringify([
+      {
+        server: 'legacy.example',
+        mintPubkey: MINT_KEY,
+        addedAt: 1,
+        locked: false,
+      },
+    ]),
+  );
+};
+
+export const installLegacyEncryptedWallet = async (): Promise<void> => {
+  localStorage.setItem('sattle_linking_key', JSON.stringify(await encryptedLinkingKeyRecord()));
+};
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  vi.unstubAllGlobals();
+  stubLocalStorage();
+  setActivePinia(createPinia());
+  lifecycleMocks.disableBiometricUnlock.mockResolvedValue();
+  lifecycleMocks.restoreFromNostr.mockResolvedValue({
+    added: 0,
+    skipped: 0,
+    linkingKeyRestored: false,
+    linkingKeySkipped: false,
+    trustedMintsAdded: 0,
+    settingsRestored: false,
+    found: [],
+  });
+  lifecycleMocks.startService.mockResolvedValue({ stop: vi.fn().mockResolvedValue(undefined) });
+});
diff --git a/src/stores/wallet.lifecycle.testMocks.ts b/src/stores/wallet.lifecycle.testMocks.ts
new file mode 100644
index 0000000..0fa789d
--- /dev/null
+++ b/src/stores/wallet.lifecycle.testMocks.ts
@@ -0,0 +1,7 @@
+import { vi } from 'vitest';
+
+export const lifecycleMocks = {
+  disableBiometricUnlock: vi.fn<() => Promise<void>>(),
+  restoreFromNostr: vi.fn(),
+  startService: vi.fn(),
+};
diff --git a/src/stores/walletLifecycle.ts b/src/stores/walletLifecycle.ts
new file mode 100644
index 0000000..e0c19eb
--- /dev/null
+++ b/src/stores/walletLifecycle.ts
@@ -0,0 +1,128 @@
+import {
+  deriveWalletLinkingKey,
+  ensureSavedKeyOwner,
+  isValidSeedPhrase,
+  linkingPubKeyHex,
+  saveLinkingKey,
+} from '@/lnurlcash/keys';
+import { migrateLegacyPasskeySlots } from '@/lnurlcash/passkeys';
+import {
+  clearPasskeySlotsForOwner,
+  clearUnownedPasskeySlots,
+  PASSKEY_SLOTS_STORAGE_KEY,
+} from '@/lnurlcash/storage/passkeySlots';
+import {
+  clearNwcStorageForOwner,
+  clearUnownedNwcStorage,
+  migrateLegacyNwcStorage,
+} from '@/lnurlcash/storage/nwcConnections';
+import { withStorageLock } from '@/lnurlcash/storageLock';
+import {
+  migrateLegacyTrustedMints,
+  removeTrustedMintsForOwner,
+  resetTrustedMintsForReplacement,
+} from '@/lnurlcash/trustedMints';
+
+export type WalletTransitionQueue = {
+  readonly run: <Result>(transition: () => Promise<Result>) => Promise<Result>;
+};
+
+type WalletTransitionQueueOptions = {
+  readonly onStart: () => void;
+  readonly onError: (error: unknown) => void;
+};
+
+export const createWalletTransitionQueue = (
+  options: WalletTransitionQueueOptions,
+): WalletTransitionQueue => {
+  let tail: Promise<void> = Promise.resolve();
+  return {
+    run: <Result>(transition: () => Promise<Result>): Promise<Result> => {
+      const execute = async (): Promise<Result> => {
+        options.onStart();
+        try {
+          return await transition();
+        } catch (error) {
+          options.onError(error);
+          throw error;
+        }
+      };
+      const operation = tail.then(execute, execute);
+      tail = operation.then(
+        () => undefined,
+        () => undefined,
+      );
+      return operation;
+    },
+  };
+};
+
+export class WalletLifecycleError extends Error {
+  override readonly name = 'WalletLifecycleError';
+
+  constructor(
+    readonly transition: string,
+    cause: unknown,
+  ) {
+    const detail = cause instanceof Error ? cause.message : 'Unknown failure.';
+    super(`Wallet ${transition} failed: ${detail}`, { cause });
+  }
+}
+
+export const stopWalletNwcSession = async (): Promise<void> => {
+  const { useNwcStore } = await import('./nwc');
+  await useNwcStore().stop();
+};
+
+export const migrateProvenLegacyOwner = async (
+  linkingKey: Uint8Array,
+  ownerWasMissing: boolean,
+): Promise<void> => {
+  ensureSavedKeyOwner(linkingKey);
+  if (!ownerWasMissing) return;
+  await migrateLegacyPasskeySlots(linkingKey);
+  migrateLegacyNwcStorage(linkingKey);
+  await migrateLegacyTrustedMints(linkingKey);
+};
+
+export const clearOwnerAuthorizations = async (
+  ownerId: string,
+  resetRegistry = false,
+): Promise<void> => {
+  await withStorageLock(PASSKEY_SLOTS_STORAGE_KEY, () => {
+    clearPasskeySlotsForOwner(ownerId);
+  });
+  clearNwcStorageForOwner(ownerId);
+  if (resetRegistry) await resetTrustedMintsForReplacement();
+  else await removeTrustedMintsForOwner(ownerId);
+};
+
+export const clearUnownedAuthorizations = async (): Promise<void> => {
+  await withStorageLock(PASSKEY_SLOTS_STORAGE_KEY, clearUnownedPasskeySlots);
+  clearUnownedNwcStorage();
+  await resetTrustedMintsForReplacement();
+};
+
+export const ownerOf = (linkingKey: Uint8Array): string => linkingPubKeyHex(linkingKey);
+
+type SeedInstallerOptions = {
+  readonly prepareInstallation: (ownerId: string) => Promise<void>;
+  readonly activate: (linkingKey: Uint8Array) => Promise<void>;
+};
+
+export type SeedInstaller = (
+  seedPhrase: string,
+  password?: string,
+  restore?: (linkingKey: Uint8Array) => Promise<void>,
+) => Promise<void>;
+
+export const createSeedInstaller =
+  (options: SeedInstallerOptions): SeedInstaller =>
+  async (seedPhrase, password, restore) => {
+    if (!isValidSeedPhrase(seedPhrase)) throw new Error('Not a valid seed phrase.');
+    const linkingKey = deriveWalletLinkingKey(seedPhrase);
+    await options.prepareInstallation(ownerOf(linkingKey));
+    if (restore) await restore(linkingKey);
+    await saveLinkingKey(linkingKey, password);
+    await options.activate(linkingKey);
+  };