diff --git a/services/platform-service/src/lib/cosmos-init.ts b/services/platform-service/src/lib/cosmos-init.ts
index a0e93928..39d6ad19 100644
--- a/services/platform-service/src/lib/cosmos-init.ts
+++ b/services/platform-service/src/lib/cosmos-init.ts
@@ -195,6 +195,7 @@ const CONTAINER_DEFS: Record<string, ContainerConfig> = {
   fleet_profiles: { partitionKeyPath: '/productId' },
   fleet_events: { partitionKeyPath: '/jobId' },
   fleet_artifacts: { partitionKeyPath: '/jobId' },
+  fleet_factory_tokens: { partitionKeyPath: '/productId' },
 };
 
 export async function initCosmosIfNeeded(): Promise<void> {
diff --git a/services/platform-service/src/modules/fleet/artifacts.test.ts b/services/platform-service/src/modules/fleet/artifacts.test.ts
index b96c1b22..d15daf10 100644
--- a/services/platform-service/src/modules/fleet/artifacts.test.ts
+++ b/services/platform-service/src/modules/fleet/artifacts.test.ts
@@ -124,8 +124,8 @@ describe('fleet artifacts — blob service', () => {
       contentType: 'image/png',
     });
 
-    const a = await repo.listArtifactsByJob('jA');
-    const b = await repo.listArtifactsByJob('jB');
+    const a = await repo.listArtifactsByJob('jA', PID);
+    const b = await repo.listArtifactsByJob('jB', PID);
     expect(a).toHaveLength(2);
     expect(a.every(x => x.jobId === 'jA')).toBe(true);
     expect(b).toHaveLength(1);
diff --git a/services/platform-service/src/modules/fleet/enrollment.test.ts b/services/platform-service/src/modules/fleet/enrollment.test.ts
new file mode 100644
index 00000000..1f15f663
--- /dev/null
+++ b/services/platform-service/src/modules/fleet/enrollment.test.ts
@@ -0,0 +1,306 @@
+/**
+ * Fleet factory enrollment + scoped tokens (§12). Unit tests run the lifecycle
+ * directly on the memory provider; route tests use Fastify inject to exercise the
+ * GATED token enforcement (default OFF) on heartbeat/claim + the management routes.
+ * Auth + productId resolution are mocked exactly like the other fleet routes tests.
+ */
+
+// Select the in-memory blob provider before the storage singleton is created
+// (the artifact upload route test exercises blob storage).
+process.env.STORAGE_PROVIDER = 'memory';
+
+import Fastify, { type FastifyInstance } from 'fastify';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { MemoryDatastoreProvider } from '@bytelyst/datastore';
+import { _resetDatastoreProvider, setProvider } from '../../lib/datastore.js';
+import * as repo from './repository.js';
+import * as enrollment from './enrollment.js';
+
+vi.mock('../../lib/auth.js', () => ({
+  extractAuth: vi.fn(async () => ({ sub: 'user_1', role: 'admin' })),
+}));
+vi.mock('../../lib/request-context.js', () => ({
+  getRequestProductId: () => 'lysnrai',
+}));
+
+const PID = 'lysnrai';
+
+async function buildApp(): Promise<FastifyInstance> {
+  const { fleetRoutes } = await import('./routes.js');
+  const app = Fastify({ logger: false });
+  await app.register(fleetRoutes, { prefix: '/api' });
+  return app;
+}
+
+describe('fleet enrollment + scoped tokens', () => {
+  beforeEach(() => {
+    setProvider(new MemoryDatastoreProvider());
+    delete process.env.FLEET_REQUIRE_FACTORY_TOKEN;
+    delete process.env.FLEET_TOKEN_ROTATION_OVERLAP_SEC;
+  });
+  afterEach(() => {
+    _resetDatastoreProvider();
+    delete process.env.FLEET_REQUIRE_FACTORY_TOKEN;
+    delete process.env.FLEET_TOKEN_ROTATION_OVERLAP_SEC;
+    vi.clearAllMocks();
+  });
+
+  // ── Lifecycle (unit) ──
+  it('enroll returns a plaintext token once; stores ONLY a hash + scope', async () => {
+    const res = await enrollment.enrollFactory({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: ['os:mac', 'engine:devin'],
+      label: 'macbook',
+    });
+    expect(res.token).toMatch(/^flt_/);
+    expect(res.scope).toEqual({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: ['os:mac', 'engine:devin'],
+    });
+
+    // stored doc holds a sha256 hash (64 hex), NOT the plaintext, and no plaintext field
+    const stored = await repo.getFactoryToken(res.tokenId, PID);
+    expect(stored).not.toBeNull();
+    expect(stored?.tokenHash).toMatch(/^[0-9a-f]{64}$/);
+    expect(stored?.tokenHash).not.toBe(res.token);
+    expect(stored?.capabilities).toEqual(['os:mac', 'engine:devin']);
+    expect(JSON.stringify(stored)).not.toContain(res.token);
+    // the factory doc was created/linked
+    expect((await repo.getFactory('fac_1', PID))?.factoryId).toBe('fac_1');
+  });
+
+  it('verifyToken: valid → scope; tampered/unknown → null', async () => {
+    const res = await enrollment.enrollFactory({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: ['os:mac'],
+    });
+    const ok = await enrollment.verifyToken(res.token);
+    expect(ok).toMatchObject({
+      factoryId: 'fac_1',
+      productId: PID,
+      capabilities: ['os:mac'],
+      status: 'active',
+    });
+    expect(await enrollment.verifyToken(`${res.token}x`)).toBeNull();
+    expect(await enrollment.verifyToken('flt_unknown')).toBeNull();
+    expect(await enrollment.verifyToken(undefined)).toBeNull();
+  });
+
+  it('revoke: token is immediately rejected', async () => {
+    const res = await enrollment.enrollFactory({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: [],
+    });
+    expect(await enrollment.verifyToken(res.token)).not.toBeNull();
+    const n = await enrollment.revokeToken({ productId: PID, factoryId: 'fac_1' });
+    expect(n).toBe(1);
+    expect(await enrollment.verifyToken(res.token)).toBeNull();
+  });
+
+  it('rotate: old token works during the grace overlap, then is rejected; new token works', async () => {
+    const first = await enrollment.enrollFactory({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: ['os:mac'],
+    });
+    const second = await enrollment.rotateToken({ productId: PID, factoryId: 'fac_1' });
+
+    // both valid during the overlap; new token inherits the prior scope
+    expect(await enrollment.verifyToken(first.token)).toMatchObject({ status: 'rotating' });
+    expect(await enrollment.verifyToken(second.token)).toMatchObject({
+      status: 'active',
+      capabilities: ['os:mac'],
+    });
+
+    // once the grace window has elapsed, the old token is rejected
+    await repo.updateFactoryToken(first.tokenId, PID, {
+      rotatingUntil: new Date(Date.now() - 1000).toISOString(),
+    });
+    expect(await enrollment.verifyToken(first.token)).toBeNull();
+    expect(await enrollment.verifyToken(second.token)).not.toBeNull();
+  });
+
+  // ── Gated enforcement on heartbeat/claim ──
+  it('enforcement OFF (default): claim + heartbeat work with NO token', async () => {
+    const app = await buildApp();
+    await app.inject({
+      method: 'POST',
+      url: '/api/fleet/jobs',
+      payload: { idempotencyKey: 'k1', bodyMd: '# t' },
+    });
+    const claim = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      payload: { factoryId: 'fac_1', capabilities: [] },
+    });
+    expect(claim.statusCode).toBe(200);
+    expect(JSON.parse(claim.body).claimed).toBe(true);
+
+    const hb = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/factories/heartbeat',
+      payload: { factoryId: 'fac_1' },
+    });
+    expect(hb.statusCode).toBe(200);
+  });
+
+  it('enforcement ON: no token → 401; out-of-scope productId/capability → 403; in-scope → ok + constrained', async () => {
+    const app = await buildApp();
+    const enrolled = await enrollment.enrollFactory({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: ['os:mac'],
+    });
+    await app.inject({
+      method: 'POST',
+      url: '/api/fleet/jobs',
+      payload: { idempotencyKey: 'k1', bodyMd: '# t' },
+    });
+
+    process.env.FLEET_REQUIRE_FACTORY_TOKEN = '1';
+
+    // no token → 401
+    const noTok = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      payload: { factoryId: 'fac_1', capabilities: [] },
+    });
+    expect(noTok.statusCode).toBe(401);
+
+    // out-of-scope productId (token is for lysnrai, request asks for 'other') → 403
+    const badPid = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      headers: { 'x-factory-token': enrolled.token },
+      payload: { factoryId: 'fac_1', productId: 'other', capabilities: [] },
+    });
+    expect(badPid.statusCode).toBe(403);
+
+    // out-of-scope capability → 403
+    const badCap = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      headers: { 'x-factory-token': enrolled.token },
+      payload: { factoryId: 'fac_1', capabilities: ['os:linux'] },
+    });
+    expect(badCap.statusCode).toBe(403);
+
+    // in-scope → ok (claim constrained to the token scope)
+    const ok = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      headers: { 'x-factory-token': enrolled.token },
+      payload: { factoryId: 'fac_1', capabilities: [] },
+    });
+    expect(ok.statusCode).toBe(200);
+    expect(JSON.parse(ok.body).claimed).toBe(true);
+  });
+
+  it('enforcement ON: revoked token → 401 on heartbeat', async () => {
+    const app = await buildApp();
+    const enrolled = await enrollment.enrollFactory({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: [],
+    });
+    await enrollment.revokeToken({ productId: PID, factoryId: 'fac_1' });
+    process.env.FLEET_REQUIRE_FACTORY_TOKEN = '1';
+    const hb = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/factories/heartbeat',
+      headers: { 'x-factory-token': enrolled.token },
+      payload: { factoryId: 'fac_1' },
+    });
+    expect(hb.statusCode).toBe(401);
+  });
+
+  // ── Management routes ──
+  it('POST /fleet/factories/enroll returns a token once (201) and rotate/revoke work', async () => {
+    const app = await buildApp();
+    const enroll = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/factories/enroll',
+      payload: { factoryId: 'fac_1', capabilities: ['os:mac'] },
+    });
+    expect(enroll.statusCode).toBe(201);
+    const body = JSON.parse(enroll.body);
+    expect(body.token).toMatch(/^flt_/);
+    expect(body.scope.capabilities).toEqual(['os:mac']);
+
+    const rotate = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/factories/fac_1/token/rotate',
+      payload: {},
+    });
+    expect(rotate.statusCode).toBe(200);
+    expect(JSON.parse(rotate.body).token).toMatch(/^flt_/);
+    expect(JSON.parse(rotate.body).token).not.toBe(body.token);
+
+    const revoke = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/factories/fac_1/token/revoke',
+      payload: {},
+    });
+    expect(revoke.statusCode).toBe(200);
+    expect(JSON.parse(revoke.body).revoked).toBeGreaterThanOrEqual(1);
+  });
+
+  // ── Artifact review fixes ──
+  it('artifacts: list is productId-scoped (a foreign product sees none)', async () => {
+    const now = new Date().toISOString();
+    await repo.createArtifact({
+      id: 'art_mine',
+      productId: PID,
+      jobId: 'jX',
+      kind: 'log',
+      blobKey: 'fleet/lysnrai/jX/art_mine-log',
+      contentType: 'text/plain',
+      sizeBytes: 3,
+      createdAt: now,
+    });
+    await repo.createArtifact({
+      id: 'art_theirs',
+      productId: 'other-product',
+      jobId: 'jX',
+      kind: 'log',
+      blobKey: 'fleet/other/jX/art_theirs-log',
+      contentType: 'text/plain',
+      sizeBytes: 3,
+      createdAt: now,
+    });
+    const mine = await repo.listArtifactsByJob('jX', PID);
+    expect(mine).toHaveLength(1);
+    expect(mine[0].id).toBe('art_mine');
+    expect(await repo.listArtifactsByJob('jX', 'other-product')).toHaveLength(1);
+    expect(await repo.listArtifactsByJob('jX', 'nobody')).toHaveLength(0);
+  });
+
+  it('artifacts: upload ignores a spoofed body.productId (uses the request product)', async () => {
+    const app = await buildApp();
+    const sub = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/jobs',
+      payload: { idempotencyKey: 'k1', bodyMd: '# t' },
+    });
+    const jobId = JSON.parse(sub.body).job.id as string;
+    const up = await app.inject({
+      method: 'POST',
+      url: `/api/fleet/jobs/${jobId}/artifacts`,
+      payload: {
+        productId: 'attacker-product',
+        kind: 'log',
+        contentType: 'text/plain',
+        contentBase64: Buffer.from('hello').toString('base64'),
+      },
+    });
+    expect(up.statusCode).toBe(201);
+    // the pointer is stored under the REQUEST product (lysnrai), not the spoofed one
+    expect(JSON.parse(up.body).artifact.productId).toBe(PID);
+    expect(await repo.listArtifactsByJob(jobId, PID)).toHaveLength(1);
+    expect(await repo.listArtifactsByJob(jobId, 'attacker-product')).toHaveLength(0);
+  });
+});
diff --git a/services/platform-service/src/modules/fleet/enrollment.ts b/services/platform-service/src/modules/fleet/enrollment.ts
new file mode 100644
index 00000000..1c79fd06
--- /dev/null
+++ b/services/platform-service/src/modules/fleet/enrollment.ts
@@ -0,0 +1,271 @@
+/**
+ * Fleet factory enrollment + scoped rotatable tokens (§12 / §18 trust boundary).
+ *
+ * A factory authenticates to the coordinator with a SCOPED bearer credential
+ * (scope = {productId, factoryId, capabilities[]}). Tokens are stored HASHED at
+ * rest (sha256 — the same primitive the auth module uses for verify/magic-link
+ * tokens); the high-entropy plaintext is returned exactly once at enroll/rotate
+ * and is NEVER persisted. Rotation keeps the previous token valid for a short
+ * grace overlap so an in-flight worker isn't cut off; revocation is immediate.
+ *
+ * Token-auth on the fleet endpoints is GATED by FLEET_REQUIRE_FACTORY_TOKEN
+ * (default OFF) so existing tests/behavior are unaffected until enforcement is on.
+ */
+
+import { createHash, randomBytes, randomUUID, timingSafeEqual } from 'node:crypto';
+import type { FastifyRequest } from 'fastify';
+import { ForbiddenError, UnauthorizedError } from '../../lib/errors.js';
+import * as repo from './repository.js';
+import {
+  FleetFactoryTokenDocSchema,
+  type FactoryTokenStatus,
+  type FleetFactoryDoc,
+} from './types.js';
+
+/** Header carrying the factory's scoped token (distinct from the user JWT). */
+export const FACTORY_TOKEN_HEADER = 'x-factory-token';
+const TOKEN_PREFIX = 'flt_';
+const DEFAULT_ROTATION_OVERLAP_SEC = 300;
+
+// ── Crypto helpers (reuse the auth module's sha256 token pattern; no new schemes) ──
+
+function hashToken(plaintext: string): string {
+  return createHash('sha256').update(plaintext).digest('hex');
+}
+
+function newPlaintextToken(): string {
+  return `${TOKEN_PREFIX}${randomBytes(32).toString('base64url')}`;
+}
+
+/** Constant-time compare of two hex digests of equal length. */
+function constantTimeEqualHex(a: string, b: string): boolean {
+  if (a.length !== b.length || a.length === 0) return false;
+  return timingSafeEqual(Buffer.from(a, 'hex'), Buffer.from(b, 'hex'));
+}
+
+function rotationOverlapSeconds(): number {
+  const v = Number(process.env.FLEET_TOKEN_ROTATION_OVERLAP_SEC);
+  return Number.isFinite(v) && v >= 0 ? v : DEFAULT_ROTATION_OVERLAP_SEC;
+}
+
+/** Enforcement flag — default OFF (unset). Read per-request so tests can toggle. */
+export function factoryTokenEnforcementEnabled(): boolean {
+  const v = (process.env.FLEET_REQUIRE_FACTORY_TOKEN ?? '').trim().toLowerCase();
+  return v === '1' || v === 'true' || v === 'yes' || v === 'on';
+}
+
+// ── Scope + result shapes ───────────────────────────────────────────────────
+
+export interface TokenScope {
+  tokenId: string;
+  factoryId: string;
+  productId: string;
+  capabilities: string[];
+  status: FactoryTokenStatus;
+}
+
+export interface IssuedToken {
+  tokenId: string;
+  /** Plaintext — returned ONCE, never persisted. */
+  token: string;
+  scope: { productId: string; factoryId: string; capabilities: string[] };
+}
+
+export interface EnrollResult extends IssuedToken {
+  factory: FleetFactoryDoc;
+}
+
+// ── Lifecycle ────────────────────────────────────────────────────────────────
+
+export interface EnrollFactoryArgs {
+  productId: string;
+  factoryId?: string;
+  capabilities?: string[];
+  label?: string;
+}
+
+/**
+ * Enroll a factory (create/link its FleetFactoryDoc) and issue its first scoped
+ * token. Returns the plaintext token ONCE; only the hash is persisted.
+ */
+export async function enrollFactory(args: EnrollFactoryArgs): Promise<EnrollResult> {
+  const productId = args.productId;
+  const factoryId = args.factoryId ?? `fac_${randomUUID()}`;
+  const capabilities = args.capabilities ?? [];
+  const now = new Date().toISOString();
+
+  let factory = await repo.getFactory(factoryId, productId);
+  if (!factory) {
+    factory = await repo.upsertFactory({
+      id: factoryId,
+      productId,
+      factoryId,
+      descriptor: {},
+      capabilities,
+      health: 'ok',
+      load: 0,
+      seatLimit: 1,
+      lastHeartbeatAt: now,
+    });
+  }
+
+  const issued = await issueToken({ productId, factoryId, capabilities, label: args.label });
+  return { ...issued, factory };
+}
+
+interface IssueTokenArgs {
+  productId: string;
+  factoryId: string;
+  capabilities: string[];
+  label?: string;
+}
+
+async function issueToken(args: IssueTokenArgs): Promise<IssuedToken> {
+  const tokenId = `fltk_${randomUUID()}`;
+  const plaintext = newPlaintextToken();
+  const doc = FleetFactoryTokenDocSchema.parse({
+    id: tokenId,
+    productId: args.productId,
+    factoryId: args.factoryId,
+    tokenHash: hashToken(plaintext),
+    capabilities: args.capabilities,
+    label: args.label,
+    status: 'active',
+    createdAt: new Date().toISOString(),
+  });
+  await repo.createFactoryToken(doc);
+  return {
+    tokenId,
+    token: plaintext,
+    scope: {
+      productId: args.productId,
+      factoryId: args.factoryId,
+      capabilities: args.capabilities,
+    },
+  };
+}
+
+export interface RotateTokenArgs {
+  productId: string;
+  factoryId: string;
+  capabilities?: string[];
+}
+
+/**
+ * Issue a new active token for a factory and mark its current active token(s)
+ * `rotating` with a short grace overlap (so an in-flight worker keeps working
+ * until `rotatingUntil`). Capabilities default to the prior scope.
+ */
+export async function rotateToken(args: RotateTokenArgs): Promise<IssuedToken> {
+  const { productId, factoryId } = args;
+  const existing = await repo.listFactoryTokens(productId, factoryId);
+  const active = existing.filter(t => t.status === 'active');
+  const capabilities = args.capabilities ?? active[0]?.capabilities ?? [];
+  const rotatingUntil = new Date(Date.now() + rotationOverlapSeconds() * 1000).toISOString();
+  for (const t of active) {
+    await repo.updateFactoryToken(t.id, productId, { status: 'rotating', rotatingUntil });
+  }
+  return issueToken({ productId, factoryId, capabilities });
+}
+
+export interface RevokeTokenArgs {
+  productId: string;
+  factoryId?: string;
+  tokenId?: string;
+}
+
+/** Revoke a factory's token(s) — immediate rejection. Returns how many were revoked. */
+export async function revokeToken(args: RevokeTokenArgs): Promise<number> {
+  const { productId } = args;
+  let targets = [] as Awaited<ReturnType<typeof repo.listFactoryTokens>>;
+  if (args.tokenId) {
+    const one = await repo.getFactoryToken(args.tokenId, productId);
+    if (one) targets = [one];
+  } else if (args.factoryId) {
+    targets = await repo.listFactoryTokens(productId, args.factoryId);
+  }
+  let revoked = 0;
+  for (const t of targets) {
+    if (t.status !== 'revoked') {
+      await repo.updateFactoryToken(t.id, productId, { status: 'revoked' });
+      revoked += 1;
+    }
+  }
+  return revoked;
+}
+
+/**
+ * Resolve a plaintext token to its scope, or null. Constant-time hash compare;
+ * revoked ⇒ null; `rotating` accepted only within the grace window. Updates
+ * `lastUsedAt` best-effort on success.
+ */
+export async function verifyToken(plaintext: string | undefined): Promise<TokenScope | null> {
+  if (!plaintext) return null;
+  const hash = hashToken(plaintext);
+  const doc = await repo.findFactoryTokenByHash(hash);
+  if (!doc) return null;
+  if (!constantTimeEqualHex(doc.tokenHash, hash)) return null;
+  if (doc.status === 'revoked') return null;
+  if (doc.status === 'rotating') {
+    const until = doc.rotatingUntil ? new Date(doc.rotatingUntil).getTime() : 0;
+    if (!until || until < Date.now()) return null;
+  }
+  await repo
+    .updateFactoryToken(doc.id, doc.productId, { lastUsedAt: new Date().toISOString() })
+    .catch(() => null);
+  return {
+    tokenId: doc.id,
+    factoryId: doc.factoryId,
+    productId: doc.productId,
+    capabilities: doc.capabilities,
+    status: doc.status,
+  };
+}
+
+// ── Gated request enforcement (heartbeat / claim) ─────────────────────────────
+
+export function extractFactoryToken(req: FastifyRequest): string | undefined {
+  const h = req.headers[FACTORY_TOKEN_HEADER];
+  if (typeof h === 'string') return h;
+  if (Array.isArray(h)) return h[0];
+  return undefined;
+}
+
+export interface EnforceOptions {
+  productId: string;
+  /** Capabilities the request wants to use; must be a subset of the token scope. */
+  capabilities?: string[];
+  /** When set, the token must belong to this factory. */
+  factoryId?: string;
+}
+
+/**
+ * When enforcement is ON: verify the factory token and confirm it covers the
+ * requested product (+ capabilities + factory). Returns the verified scope so the
+ * caller can constrain the operation to it. Throws 401 (missing/invalid/revoked)
+ * or 403 (out of scope). When enforcement is OFF: returns null (behaves as today).
+ */
+export async function enforceFactoryToken(
+  req: FastifyRequest,
+  opts: EnforceOptions
+): Promise<TokenScope | null> {
+  if (!factoryTokenEnforcementEnabled()) return null;
+  const scope = await verifyToken(extractFactoryToken(req));
+  if (!scope) throw new UnauthorizedError('factory token required (missing, invalid, or revoked)');
+  if (scope.productId !== opts.productId) {
+    throw new ForbiddenError('factory token productId is out of scope');
+  }
+  if (opts.factoryId && scope.factoryId !== opts.factoryId) {
+    throw new ForbiddenError('factory token does not match the requested factoryId');
+  }
+  if (opts.capabilities && opts.capabilities.length > 0) {
+    const granted = new Set(scope.capabilities);
+    const missing = opts.capabilities.filter(c => !granted.has(c));
+    if (missing.length > 0) {
+      throw new ForbiddenError(
+        `factory token scope is missing capabilities: ${missing.join(', ')}`
+      );
+    }
+  }
+  return scope;
+}
diff --git a/services/platform-service/src/modules/fleet/repository.test.ts b/services/platform-service/src/modules/fleet/repository.test.ts
index e7c393dc..039794a7 100644
--- a/services/platform-service/src/modules/fleet/repository.test.ts
+++ b/services/platform-service/src/modules/fleet/repository.test.ts
@@ -182,7 +182,7 @@ describe('fleet repository', () => {
       sizeBytes: 42,
       createdAt: now,
     });
-    const arts = await repo.listArtifactsByJob('j');
+    const arts = await repo.listArtifactsByJob('j', PID);
     expect(arts).toHaveLength(1);
     expect(arts[0].blobKey).toBe('fleet/lysnrai/j/art_1-coverage');
 
@@ -193,7 +193,7 @@ describe('fleet repository', () => {
     // delete returns the removed doc and clears the partition
     const removed = await repo.deleteArtifact('art_1', PID);
     expect(removed?.id).toBe('art_1');
-    expect(await repo.listArtifactsByJob('j')).toHaveLength(0);
+    expect(await repo.listArtifactsByJob('j', PID)).toHaveLength(0);
     expect(await repo.deleteArtifact('art_1', PID)).toBeNull();
   });
 });
diff --git a/services/platform-service/src/modules/fleet/repository.ts b/services/platform-service/src/modules/fleet/repository.ts
index a298855f..dfc95547 100644
--- a/services/platform-service/src/modules/fleet/repository.ts
+++ b/services/platform-service/src/modules/fleet/repository.ts
@@ -22,6 +22,7 @@ import type {
   FleetArtifactDoc,
   FleetEventDoc,
   FleetFactoryDoc,
+  FleetFactoryTokenDoc,
   FleetJobDoc,
   FleetLeaseDoc,
   FleetProfileDoc,
@@ -52,6 +53,9 @@ function events(): DocumentCollection<FleetEventDoc> {
 function artifacts(): DocumentCollection<FleetArtifactDoc> {
   return getCollection<FleetArtifactDoc>('fleet_artifacts', '/jobId');
 }
+function factoryTokens(): DocumentCollection<FleetFactoryTokenDoc> {
+  return getCollection<FleetFactoryTokenDoc>('fleet_factory_tokens', '/productId');
+}
 
 /** Result of a compare-and-swap update. */
 export type RevResult<T> = { ok: true; doc: T } | { ok: false; reason: 'not_found' | 'conflict' };
@@ -253,9 +257,16 @@ export async function createArtifact(doc: FleetArtifactDoc): Promise<FleetArtifa
   return artifacts().create(doc);
 }
 
-/** All artifact pointers for a job, oldest-first (single partition — pk `/jobId`). */
-export async function listArtifactsByJob(jobId: string): Promise<FleetArtifactDoc[]> {
-  return artifacts().findMany({ filter: { jobId }, sort: { createdAt: 1 } });
+/**
+ * All artifact pointers for a job, oldest-first (single partition — pk `/jobId`),
+ * scoped to the owning `productId` so a caller can only list its own product's
+ * artifacts (a foreign product sees none).
+ */
+export async function listArtifactsByJob(
+  jobId: string,
+  productId: string
+): Promise<FleetArtifactDoc[]> {
+  return artifacts().findMany({ filter: { jobId, productId }, sort: { createdAt: 1 } });
 }
 
 /**
@@ -283,3 +294,42 @@ export async function deleteArtifact(
   await artifacts().delete(id, doc.jobId);
   return doc;
 }
+
+// ── Factory tokens (scoped, rotatable credentials — §12; hashed at rest) ────────
+
+export async function createFactoryToken(doc: FleetFactoryTokenDoc): Promise<FleetFactoryTokenDoc> {
+  return factoryTokens().create(doc);
+}
+
+export async function getFactoryToken(
+  id: string,
+  productId: string
+): Promise<FleetFactoryTokenDoc | null> {
+  return factoryTokens().findById(id, productId);
+}
+
+/** Resolve a token by its sha256 hash (verify path — partition-agnostic lookup). */
+export async function findFactoryTokenByHash(
+  tokenHash: string
+): Promise<FleetFactoryTokenDoc | null> {
+  const found = await factoryTokens().findMany({ filter: { tokenHash }, limit: 1 });
+  return found[0] ?? null;
+}
+
+/** All token records for a factory within a product (rotate/revoke lookups). */
+export async function listFactoryTokens(
+  productId: string,
+  factoryId: string
+): Promise<FleetFactoryTokenDoc[]> {
+  return factoryTokens().findMany({ filter: { productId, factoryId } });
+}
+
+export async function updateFactoryToken(
+  id: string,
+  productId: string,
+  updates: Partial<FleetFactoryTokenDoc>
+): Promise<FleetFactoryTokenDoc | null> {
+  const cur = await factoryTokens().findById(id, productId);
+  if (!cur) return null;
+  return factoryTokens().update(id, productId, updates);
+}
diff --git a/services/platform-service/src/modules/fleet/routes.ts b/services/platform-service/src/modules/fleet/routes.ts
index 12b80706..3e6144ef 100644
--- a/services/platform-service/src/modules/fleet/routes.ts
+++ b/services/platform-service/src/modules/fleet/routes.ts
@@ -26,6 +26,7 @@ import { extractAuth } from '../../lib/auth.js';
 import * as repo from './repository.js';
 import * as coordinator from './coordinator.js';
 import * as artifactsBlob from './artifacts-blob.js';
+import * as enrollment from './enrollment.js';
 import {
   SubmitJobSchema,
   ListJobsQuerySchema,
@@ -35,6 +36,9 @@ import {
   ReleaseLeaseSchema,
   HeartbeatSchema,
   UploadArtifactSchema,
+  EnrollFactorySchema,
+  RotateTokenSchema,
+  RevokeTokenSchema,
 } from './types.js';
 
 function badRequest(issues: { message: string }[]): never {
@@ -104,10 +108,18 @@ export async function fleetRoutes(app: FastifyInstance) {
     const parsed = ClaimSchema.safeParse(req.body);
     if (!parsed.success) badRequest(parsed.error.issues);
     const pid = parsed.data.productId || getRequestProductId(req);
-    const claim = await coordinator.claimNextJob({
+    // §12: when enforcement is ON, the token must cover the productId + requested
+    // capabilities + factoryId; the claim is then CONSTRAINED to the verified scope
+    // (a factory cannot claim outside it). When OFF, behaves exactly as before.
+    const scope = await enrollment.enforceFactoryToken(req, {
       productId: pid,
-      factoryId: parsed.data.factoryId,
       capabilities: parsed.data.capabilities,
+      factoryId: parsed.data.factoryId,
+    });
+    const claim = await coordinator.claimNextJob({
+      productId: scope?.productId ?? pid,
+      factoryId: scope?.factoryId ?? parsed.data.factoryId,
+      capabilities: scope ? scope.capabilities : parsed.data.capabilities,
       leaseSeconds: parsed.data.leaseSeconds,
     });
     if (!claim) return { claimed: false };
@@ -156,7 +168,14 @@ export async function fleetRoutes(app: FastifyInstance) {
     await extractAuth(req);
     const parsed = HeartbeatSchema.safeParse(req.body);
     if (!parsed.success) badRequest(parsed.error.issues);
-    const pid = parsed.data.productId || getRequestProductId(req);
+    const pidCandidate = parsed.data.productId || getRequestProductId(req);
+    // §12: gated token check (default OFF). When ON the token must cover this
+    // product + factory; the heartbeat is then bound to the verified scope.
+    const scope = await enrollment.enforceFactoryToken(req, {
+      productId: pidCandidate,
+      factoryId: parsed.data.factoryId,
+    });
+    const pid = scope?.productId ?? pidCandidate;
     await coordinator.heartbeat({
       productId: pid,
       factoryId: parsed.data.factoryId,
@@ -192,7 +211,9 @@ export async function fleetRoutes(app: FastifyInstance) {
     const { id: jobId } = req.params as { id: string };
     const parsed = UploadArtifactSchema.safeParse(req.body);
     if (!parsed.success) badRequest(parsed.error.issues);
-    const pid = parsed.data.productId || getRequestProductId(req);
+    // Review fix: the request/auth productId is authoritative — a spoofed
+    // body.productId must NOT override it (prevents writing into another product).
+    const pid = getRequestProductId(req);
     const bytes = Buffer.from(parsed.data.contentBase64, 'base64');
     if (bytes.length === 0) badRequest([{ message: 'contentBase64 decoded to empty bytes' }]);
     const { artifact, downloadUrl } = await artifactsBlob.uploadArtifact({
@@ -207,11 +228,14 @@ export async function fleetRoutes(app: FastifyInstance) {
     return { artifact, downloadUrl };
   });
 
-  // ── Artifacts: list a job's pointers ──
+  // ── Artifacts: list a job's pointers (productId-scoped) ──
   app.get('/fleet/jobs/:id/artifacts', async req => {
     await extractAuth(req);
     const { id: jobId } = req.params as { id: string };
-    const artifacts = await repo.listArtifactsByJob(jobId);
+    // Review fix: scope to the request productId so a caller only sees its own
+    // product's artifact pointers for this job.
+    const pid = getRequestProductId(req);
+    const artifacts = await repo.listArtifactsByJob(jobId, pid);
     return { artifacts };
   });
 
@@ -234,4 +258,59 @@ export async function fleetRoutes(app: FastifyInstance) {
     if (!deleted) throw new NotFoundError('Artifact not found');
     return { deleted: true };
   });
+
+  // ── Enrollment + scoped tokens (§12) ──
+  // Management endpoints (user auth + productId). The plaintext token is returned
+  // ONCE here; only its hash is persisted.
+  app.post('/fleet/factories/enroll', async (req, reply) => {
+    await extractAuth(req);
+    const parsed = EnrollFactorySchema.safeParse(req.body);
+    if (!parsed.success) badRequest(parsed.error.issues);
+    const pid = parsed.data.productId || getRequestProductId(req);
+    const result = await enrollment.enrollFactory({
+      productId: pid,
+      factoryId: parsed.data.factoryId,
+      capabilities: parsed.data.capabilities,
+      label: parsed.data.label,
+    });
+    reply.code(201);
+    return {
+      factory: result.factory,
+      tokenId: result.tokenId,
+      token: result.token,
+      scope: result.scope,
+    };
+  });
+
+  // ── Rotate a factory's token (old token honored for a short grace overlap) ──
+  app.post('/fleet/factories/:id/token/rotate', async req => {
+    await extractAuth(req);
+    const { id: factoryId } = req.params as { id: string };
+    const parsed = RotateTokenSchema.safeParse(req.body ?? {});
+    if (!parsed.success) badRequest(parsed.error.issues);
+    const pid = parsed.data.productId || getRequestProductId(req);
+    const factory = await repo.getFactory(factoryId, pid);
+    if (!factory) throw new NotFoundError('Factory not found');
+    const issued = await enrollment.rotateToken({
+      productId: pid,
+      factoryId,
+      capabilities: parsed.data.capabilities,
+    });
+    return { tokenId: issued.tokenId, token: issued.token, scope: issued.scope };
+  });
+
+  // ── Revoke a factory's token(s) — immediate rejection ──
+  app.post('/fleet/factories/:id/token/revoke', async req => {
+    await extractAuth(req);
+    const { id: factoryId } = req.params as { id: string };
+    const parsed = RevokeTokenSchema.safeParse(req.body ?? {});
+    if (!parsed.success) badRequest(parsed.error.issues);
+    const pid = parsed.data.productId || getRequestProductId(req);
+    const revoked = await enrollment.revokeToken({
+      productId: pid,
+      factoryId,
+      tokenId: parsed.data.tokenId,
+    });
+    return { revoked };
+  });
 }
diff --git a/services/platform-service/src/modules/fleet/types.ts b/services/platform-service/src/modules/fleet/types.ts
index 5cc13e4b..a6eb5f86 100644
--- a/services/platform-service/src/modules/fleet/types.ts
+++ b/services/platform-service/src/modules/fleet/types.ts
@@ -212,6 +212,32 @@ export const FleetFactoryDocSchema = z.object({
 });
 export type FleetFactoryDoc = z.infer<typeof FleetFactoryDocSchema>;
 
+export const FACTORY_TOKEN_STATUSES = ['active', 'rotating', 'revoked'] as const;
+export type FactoryTokenStatus = (typeof FACTORY_TOKEN_STATUSES)[number];
+
+/**
+ * FleetFactoryTokenDoc — a SCOPED, rotatable credential for a factory (pk `/productId`, §12).
+ *
+ * Stored HASHED at rest (`tokenHash` = sha256 of the plaintext); the plaintext is
+ * returned exactly once at enroll/rotate and is NEVER persisted. `scope` is
+ * {productId (the partition), factoryId, capabilities[]}. `status` drives the trust
+ * decision: `active` accepted; `rotating` accepted only until `rotatingUntil` (grace
+ * overlap so an in-flight worker isn't cut off); `revoked` always rejected.
+ */
+export const FleetFactoryTokenDocSchema = z.object({
+  id: z.string(),
+  productId: z.string().min(1),
+  factoryId: z.string().min(1),
+  tokenHash: z.string().min(1),
+  capabilities: z.array(z.string()).default([]),
+  label: z.string().optional(),
+  status: z.enum(FACTORY_TOKEN_STATUSES).default('active'),
+  createdAt: z.string(),
+  lastUsedAt: z.string().optional(),
+  rotatingUntil: z.string().optional(),
+});
+export type FleetFactoryTokenDoc = z.infer<typeof FleetFactoryTokenDocSchema>;
+
 /** FleetProfileDoc — an immutable, versioned profile snapshot (pk `/productId`). */
 export const FleetProfileDocSchema = z.object({
   id: z.string(),
@@ -343,3 +369,26 @@ export const UploadArtifactSchema = z.object({
   contentBase64: z.string().min(1),
 });
 export type UploadArtifactInput = z.infer<typeof UploadArtifactSchema>;
+
+/** Enroll a factory + issue its first scoped token (§12). */
+export const EnrollFactorySchema = z.object({
+  productId: z.string().min(1).optional(),
+  factoryId: z.string().min(1).optional(),
+  capabilities: z.array(z.string()).default([]),
+  label: z.string().optional(),
+});
+export type EnrollFactoryInput = z.infer<typeof EnrollFactorySchema>;
+
+/** Rotate a factory's token. Capabilities default to the current scope when omitted. */
+export const RotateTokenSchema = z.object({
+  productId: z.string().min(1).optional(),
+  capabilities: z.array(z.string()).optional(),
+});
+export type RotateTokenInput = z.infer<typeof RotateTokenSchema>;
+
+/** Revoke a factory's token(s); an explicit `tokenId` narrows to one credential. */
+export const RevokeTokenSchema = z.object({
+  productId: z.string().min(1).optional(),
+  tokenId: z.string().min(1).optional(),
+});
+export type RevokeTokenInput = z.infer<typeof RevokeTokenSchema>;