diff --git a/cloud/TASKS.md b/cloud/TASKS.md
index 7623cb90..dc56d322 100644
--- a/cloud/TASKS.md
+++ b/cloud/TASKS.md
@@ -19,7 +19,7 @@
 ## P1 — Lumina Cloud client integration
 
 ### C1 — Scaffold `src/services/luminaCloud/`
-- [ ] **Goal:** Empty-but-typed module structure: `client.ts`, `types.ts`, `PUBLIC_KEY.ts`, `verify.ts`, `store.ts`, `revocations.ts`, `index.ts` (barrel).
+- [x] **Goal:** Empty-but-typed module structure: `client.ts`, `types.ts`, `PUBLIC_KEY.ts`, `verify.ts`, `store.ts`, `revocations.ts`, `index.ts` (barrel).
 - **Acceptance:**
   - `types.ts` mirrors `cloud/CONTRACT.md` §1.1 license payload + §2.4 usage response + §6 error shapes.
   - `index.ts` re-exports the public surface.
@@ -126,3 +126,5 @@
 ## Done log
 
 (Loop agent appends `[x] C<n> — <date> — <commit hash> — <one-line note>` here as tasks complete, mirroring the `[x]` above.)
+
+[x] C1 — 2026-04-28 — ba66b60 — scaffolded `src/services/luminaCloud/` (types + stubs); typecheck passes; no new runtime deps
diff --git a/src/services/luminaCloud/PUBLIC_KEY.ts b/src/services/luminaCloud/PUBLIC_KEY.ts
new file mode 100644
index 00000000..6b1b2765
--- /dev/null
+++ b/src/services/luminaCloud/PUBLIC_KEY.ts
@@ -0,0 +1,12 @@
+/**
+ * Ed25519 public key for verifying Lumina Cloud licenses (CONTRACT.md §1.2, §7).
+ *
+ * Format: base64-encoded 32-byte raw Ed25519 public key.
+ *
+ * LEAD: replace with real public key from lumina-cloud T3 output.
+ *
+ * Until the real key is delivered, tests use a fixture keypair (see C2 task).
+ * The placeholder below is deliberately a recognizably-fake all-`A` string so
+ * any accidental ship-to-prod fails verification immediately.
+ */
+export const PUBLIC_KEY_B64 = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=';
diff --git a/src/services/luminaCloud/client.ts b/src/services/luminaCloud/client.ts
new file mode 100644
index 00000000..ae0d7a74
--- /dev/null
+++ b/src/services/luminaCloud/client.ts
@@ -0,0 +1,32 @@
+import type {
+  LicenseVerifyResponse,
+  ModelsResponse,
+  RevocationsResponse,
+  UsageResponse,
+} from './types';
+
+/**
+ * Typed HTTP client for the Lumina Cloud REST surface (CONTRACT.md §2).
+ * Implemented in task C5 — this scaffold only fixes the public shape.
+ *
+ * Base URL is configurable via `LUMINA_CLOUD_BASE_URL`, default
+ * `https://api.lumina-note.com`.
+ */
+
+export const DEFAULT_BASE_URL = 'https://api.lumina-note.com';
+
+export async function verifyLicenseOnline(_license: string): Promise<LicenseVerifyResponse> {
+  throw new Error('luminaCloud.client.verifyLicenseOnline: not implemented yet (task C5)');
+}
+
+export async function getModels(_license: string): Promise<ModelsResponse> {
+  throw new Error('luminaCloud.client.getModels: not implemented yet (task C5)');
+}
+
+export async function getUsage(_license: string): Promise<UsageResponse> {
+  throw new Error('luminaCloud.client.getUsage: not implemented yet (task C5)');
+}
+
+export async function getRevocations(_since?: string): Promise<RevocationsResponse> {
+  throw new Error('luminaCloud.client.getRevocations: not implemented yet (task C5)');
+}
diff --git a/src/services/luminaCloud/index.ts b/src/services/luminaCloud/index.ts
new file mode 100644
index 00000000..7023de37
--- /dev/null
+++ b/src/services/luminaCloud/index.ts
@@ -0,0 +1,34 @@
+/**
+ * Lumina Cloud client — public barrel.
+ *
+ * Wire types and behaviors are pinned to `cloud/CONTRACT.md`. See
+ * `cloud/TASKS.md` for the per-file rollout (C1…C13).
+ */
+
+export type {
+  CloudErrorBody,
+  CloudErrorCode,
+  CloudModel,
+  LicensePayload,
+  LicenseStatus,
+  LicenseVerifyResponse,
+  ModelsResponse,
+  RevocationsResponse,
+  UsageResponse,
+} from './types';
+
+export { PUBLIC_KEY_B64 } from './PUBLIC_KEY';
+
+export { verifyLicense } from './verify';
+
+export { loadLicense, removeLicense, saveLicense } from './store';
+
+export { isRevoked } from './revocations';
+
+export {
+  DEFAULT_BASE_URL,
+  getModels,
+  getRevocations,
+  getUsage,
+  verifyLicenseOnline,
+} from './client';
diff --git a/src/services/luminaCloud/revocations.ts b/src/services/luminaCloud/revocations.ts
new file mode 100644
index 00000000..a2157a0e
--- /dev/null
+++ b/src/services/luminaCloud/revocations.ts
@@ -0,0 +1,8 @@
+/**
+ * Local revocation cache, refreshed daily from `GET /v1/license/revocations`
+ * (CONTRACT.md §2.5). Implemented in task C6.
+ */
+
+export async function isRevoked(_lid: string): Promise<boolean> {
+  throw new Error('luminaCloud.isRevoked: not implemented yet (task C6)');
+}
diff --git a/src/services/luminaCloud/store.ts b/src/services/luminaCloud/store.ts
new file mode 100644
index 00000000..5aad0999
--- /dev/null
+++ b/src/services/luminaCloud/store.ts
@@ -0,0 +1,19 @@
+/**
+ * License storage in the OS keychain (Electron `safeStorage`) with a Linux
+ * file fallback. Implemented in task C3.
+ *
+ * The functions are async because the IPC bridge to the Electron main process
+ * is async; the in-memory derived state lives in `useLicenseStore` (task C4).
+ */
+
+export async function saveLicense(_license: string): Promise<void> {
+  throw new Error('luminaCloud.saveLicense: not implemented yet (task C3)');
+}
+
+export async function loadLicense(): Promise<string | null> {
+  throw new Error('luminaCloud.loadLicense: not implemented yet (task C3)');
+}
+
+export async function removeLicense(): Promise<void> {
+  throw new Error('luminaCloud.removeLicense: not implemented yet (task C3)');
+}
diff --git a/src/services/luminaCloud/types.ts b/src/services/luminaCloud/types.ts
new file mode 100644
index 00000000..76c2093d
--- /dev/null
+++ b/src/services/luminaCloud/types.ts
@@ -0,0 +1,88 @@
+/**
+ * Wire types mirroring `cloud/CONTRACT.md`. Keep this file in lock-step with
+ * the contract — when the contract changes, update here and bump tests.
+ */
+
+// §1.1 License payload (canonical JSON, sorted keys, embedded in the license token)
+export interface LicensePayload {
+  /** Schema version — currently 1. */
+  v: number;
+  /** License id, ULID-shaped. */
+  lid: string;
+  /** Buyer email, lowercased. */
+  email: string;
+  /** SKU identifier — see CONTRACT.md §3. */
+  sku: string;
+  /** Feature flags — see CONTRACT.md §4. Unknown flags must be ignored by the client. */
+  features: string[];
+  /** ISO 8601 UTC, `Z` suffix. */
+  issued_at: string;
+  /** ISO 8601 UTC `Z`, or null for lifetime licenses. */
+  expires_at: string | null;
+  /** Upstream order id from Creem. */
+  order_id: string;
+  /** Soft, advisory device cap — clients may ignore. */
+  device_limit: number;
+}
+
+// §2.1 Online verification response
+export type LicenseVerifyResponse =
+  | {
+      valid: true;
+      payload: LicensePayload;
+      revoked: boolean;
+      usage: UsageResponse;
+    }
+  | {
+      valid: false;
+      reason: 'signature_invalid' | 'revoked' | 'expired' | 'malformed';
+    };
+
+// §2.3 Models list
+export interface CloudModel {
+  id: string;
+  upstream: string;
+  context: number;
+}
+
+export interface ModelsResponse {
+  data: CloudModel[];
+}
+
+// §2.4 Usage response
+export interface UsageResponse {
+  period_start: string;
+  period_end: string;
+  tokens_used: number;
+  tokens_quota: number;
+  requests_count: number;
+}
+
+// §2.5 Revocations
+export interface RevocationsResponse {
+  as_of: string;
+  revoked_lids: string[];
+}
+
+// §6 Error format
+export type CloudErrorCode =
+  | 'bad_request'
+  | 'invalid_license'
+  | 'revoked_license'
+  | 'expired_license'
+  | 'quota_exceeded'
+  | 'feature_disabled'
+  | 'not_found'
+  | 'rate_limit'
+  | 'internal'
+  | 'upstream_unavailable';
+
+export interface CloudErrorBody {
+  error: {
+    code: CloudErrorCode;
+    message: string;
+  };
+}
+
+// Client-side derived state — used by the Zustand store (C4)
+export type LicenseStatus = 'idle' | 'loading' | 'valid' | 'invalid';
diff --git a/src/services/luminaCloud/verify.ts b/src/services/luminaCloud/verify.ts
new file mode 100644
index 00000000..069ddcd9
--- /dev/null
+++ b/src/services/luminaCloud/verify.ts
@@ -0,0 +1,14 @@
+import type { LicensePayload } from './types';
+
+/**
+ * Offline license verification per CONTRACT.md §1.3.
+ *
+ * Returns the decoded payload iff the Ed25519 signature verifies against the
+ * bundled public key, otherwise returns `null`. Never throws — malformed
+ * input yields `null` too.
+ *
+ * Implemented in task C2 with `@noble/ed25519`.
+ */
+export function verifyLicense(_license: string): LicensePayload | null {
+  throw new Error('luminaCloud.verifyLicense: not implemented yet (task C2)');
+}