diff --git a/services/platform-service/src/modules/fleet/repository.test.ts b/services/platform-service/src/modules/fleet/repository.test.ts
new file mode 100644
index 00000000..cdf5b6b5
--- /dev/null
+++ b/services/platform-service/src/modules/fleet/repository.test.ts
@@ -0,0 +1,187 @@
+/**
+ * Fleet repository — CRUD round-trips, list filters, appendEvent ordering, and
+ * the rev compare-and-swap. Runs on the in-memory datastore provider.
+ */
+
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import { MemoryDatastoreProvider } from '@bytelyst/datastore';
+import { _resetDatastoreProvider, setProvider } from '../../lib/datastore.js';
+import * as repo from './repository.js';
+import type { FleetJobDoc } from './types.js';
+
+const PID = 'lysnrai';
+const now = '2026-05-30T00:00:00.000Z';
+
+function jobDoc(over: Partial<FleetJobDoc> = {}): FleetJobDoc {
+  return {
+    id: 'fjob_1',
+    productId: PID,
+    stage: 'queued',
+    idempotencyKey: 'task-1',
+    contentHash: 'h1',
+    bodyMd: '# task',
+    manifestSnapshot: {
+      priority: 'medium',
+      capabilities: [],
+      prefersEngine: [],
+      allowedScope: [],
+      deps: [],
+    },
+    priority: 'medium',
+    priorityOrder: 2,
+    capabilities: [],
+    deps: [],
+    kind: 'leaf',
+    attempts: 0,
+    leaseEpoch: 0,
+    rev: 0,
+    createdAt: now,
+    updatedAt: now,
+    ...over,
+  };
+}
+
+describe('fleet repository', () => {
+  beforeEach(() => setProvider(new MemoryDatastoreProvider()));
+  afterEach(() => _resetDatastoreProvider());
+
+  it('jobs: create / getById / list by stage + idempotencyKey', async () => {
+    await repo.createJob(jobDoc({ id: 'fjob_1', idempotencyKey: 'a', stage: 'queued' }));
+    await repo.createJob(jobDoc({ id: 'fjob_2', idempotencyKey: 'b', stage: 'blocked' }));
+
+    expect((await repo.getJob('fjob_1', PID))?.idempotencyKey).toBe('a');
+    expect(await repo.getJob('missing', PID)).toBeNull();
+
+    const queued = await repo.listJobs({ productId: PID, stage: 'queued' });
+    expect(queued.map(j => j.id)).toEqual(['fjob_1']);
+
+    const byKey = await repo.findJobsByIdempotencyKey(PID, 'b');
+    expect(byKey).toHaveLength(1);
+    expect(byKey[0].id).toBe('fjob_2');
+  });
+
+  it('jobs: revUpdate is a compare-and-swap', async () => {
+    await repo.createJob(jobDoc({ id: 'fjob_cas', rev: 0, stage: 'queued' }));
+
+    const first = await repo.revUpdateJob('fjob_cas', PID, 0, { stage: 'assigned' });
+    expect(first.ok).toBe(true);
+    if (first.ok) expect(first.doc.rev).toBe(1);
+
+    // a second writer using the stale rev (0) must conflict
+    const stale = await repo.revUpdateJob('fjob_cas', PID, 0, { stage: 'building' });
+    expect(stale.ok).toBe(false);
+    if (!stale.ok) expect(stale.reason).toBe('conflict');
+
+    const missing = await repo.revUpdateJob('nope', PID, 0, { stage: 'failed' });
+    expect(missing.ok).toBe(false);
+    if (!missing.ok) expect(missing.reason).toBe('not_found');
+  });
+
+  it('runs: create + list ordered by attempt', async () => {
+    await repo.createRun({
+      id: 'r2',
+      productId: PID,
+      jobId: 'j',
+      attempt: 2,
+      engine: 'devin',
+      startedAt: now,
+      insights: {},
+    });
+    await repo.createRun({
+      id: 'r1',
+      productId: PID,
+      jobId: 'j',
+      attempt: 1,
+      engine: 'devin',
+      startedAt: now,
+      insights: {},
+    });
+    const runs = await repo.listRunsByJob('j');
+    expect(runs.map(r => r.attempt)).toEqual([1, 2]);
+  });
+
+  it('leases: create + revUpdate', async () => {
+    await repo.createLease({
+      id: 'j',
+      productId: PID,
+      jobId: 'j',
+      leaseEpoch: 1,
+      renewals: 0,
+      status: 'held',
+      rev: 0,
+      updatedAt: now,
+    });
+    const res = await repo.revUpdateLease('j', 0, { renewals: 1 });
+    expect(res.ok).toBe(true);
+    if (res.ok) expect(res.doc.renewals).toBe(1);
+    expect((await repo.getLease('j'))?.rev).toBe(1);
+  });
+
+  it('factories: upsert + list by productId', async () => {
+    await repo.upsertFactory({
+      id: 'fac_1',
+      productId: PID,
+      factoryId: 'fac_1',
+      descriptor: {},
+      capabilities: ['os:mac'],
+      health: 'ok',
+      load: 0,
+      seatLimit: 1,
+      lastHeartbeatAt: now,
+    });
+    await repo.upsertFactory({
+      id: 'fac_1',
+      productId: PID,
+      factoryId: 'fac_1',
+      descriptor: {},
+      capabilities: ['os:mac'],
+      health: 'degraded',
+      load: 2,
+      seatLimit: 1,
+      lastHeartbeatAt: now,
+    });
+    const list = await repo.listFactories(PID);
+    expect(list).toHaveLength(1);
+    expect(list[0].health).toBe('degraded');
+  });
+
+  it('profiles: create + get', async () => {
+    await repo.createProfile({
+      id: 'prof_1',
+      productId: PID,
+      name: 'backend',
+      version: 1,
+      snapshot: { persona: 'x' },
+      createdAt: now,
+    });
+    expect((await repo.getProfile('prof_1', PID))?.name).toBe('backend');
+  });
+
+  it('events: appendEvent yields an ordered, append-only stream', async () => {
+    await repo.appendEvent({ jobId: 'j', productId: PID, type: 'submitted' });
+    await repo.appendEvent({ jobId: 'j', productId: PID, type: 'assigned', actor: 'fac_1' });
+    await repo.appendEvent({
+      jobId: 'j',
+      productId: PID,
+      type: 'transition',
+      data: { stage: 'building' },
+    });
+    const events = await repo.listEvents('j');
+    expect(events.map(e => e.seq)).toEqual([0, 1, 2]);
+    expect(events.map(e => e.type)).toEqual(['submitted', 'assigned', 'transition']);
+  });
+
+  it('artifacts: create + list', async () => {
+    await repo.createArtifact({
+      id: 'art_1',
+      productId: PID,
+      jobId: 'j',
+      kind: 'coverage',
+      blobUrl: 'https://b/x',
+      createdAt: now,
+    });
+    const arts = await repo.listArtifacts('j');
+    expect(arts).toHaveLength(1);
+    expect(arts[0].blobUrl).toBe('https://b/x');
+  });
+});
diff --git a/services/platform-service/src/modules/fleet/repository.ts b/services/platform-service/src/modules/fleet/repository.ts
new file mode 100644
index 00000000..8f2cee4a
--- /dev/null
+++ b/services/platform-service/src/modules/fleet/repository.ts
@@ -0,0 +1,257 @@
+/**
+ * Fleet repositories — one per fleet_* container, cloud-agnostic via @bytelyst/datastore.
+ *
+ * Partition keys (see lib/cosmos-init.ts):
+ *   fleet_jobs       /productId      fleet_runs      /jobId
+ *   fleet_leases     /jobId          fleet_factories /productId
+ *   fleet_profiles   /productId      fleet_events    /jobId
+ *   fleet_artifacts  /jobId
+ *
+ * Optimistic concurrency: jobs and leases carry a monotonic `rev` token.
+ * `revUpdate*` is a compare-and-swap — it writes only when the stored `rev`
+ * still equals the caller's expected `rev`, otherwise it reports a conflict
+ * WITHOUT writing. In production (Cosmos) this maps to an `_etag` / If-Match
+ * conditional replace; on the memory provider it is enforced by re-reading the
+ * current `rev` immediately before the write, which is exact for the sequential
+ * calls the coordinator + tests make (see coordinator.claimNextJob).
+ */
+
+import type { DocumentCollection } from '@bytelyst/datastore';
+import { getCollection } from '../../lib/datastore.js';
+import type {
+  FleetArtifactDoc,
+  FleetEventDoc,
+  FleetFactoryDoc,
+  FleetJobDoc,
+  FleetLeaseDoc,
+  FleetProfileDoc,
+  FleetRunDoc,
+  FleetStage,
+} from './types.js';
+
+// ── Collections ───────────────────────────────────────────────────────────────
+
+function jobs(): DocumentCollection<FleetJobDoc> {
+  return getCollection<FleetJobDoc>('fleet_jobs', '/productId');
+}
+function runs(): DocumentCollection<FleetRunDoc> {
+  return getCollection<FleetRunDoc>('fleet_runs', '/jobId');
+}
+function leases(): DocumentCollection<FleetLeaseDoc> {
+  return getCollection<FleetLeaseDoc>('fleet_leases', '/jobId');
+}
+function factories(): DocumentCollection<FleetFactoryDoc> {
+  return getCollection<FleetFactoryDoc>('fleet_factories', '/productId');
+}
+function profiles(): DocumentCollection<FleetProfileDoc> {
+  return getCollection<FleetProfileDoc>('fleet_profiles', '/productId');
+}
+function events(): DocumentCollection<FleetEventDoc> {
+  return getCollection<FleetEventDoc>('fleet_events', '/jobId');
+}
+function artifacts(): DocumentCollection<FleetArtifactDoc> {
+  return getCollection<FleetArtifactDoc>('fleet_artifacts', '/jobId');
+}
+
+/** Result of a compare-and-swap update. */
+export type RevResult<T> = { ok: true; doc: T } | { ok: false; reason: 'not_found' | 'conflict' };
+
+// ── Jobs ──────────────────────────────────────────────────────────────────────
+
+export async function createJob(doc: FleetJobDoc): Promise<FleetJobDoc> {
+  return jobs().create(doc);
+}
+
+export async function getJob(id: string, productId: string): Promise<FleetJobDoc | null> {
+  return jobs().findById(id, productId);
+}
+
+export interface ListJobsFilter {
+  productId: string;
+  stage?: FleetStage;
+  idempotencyKey?: string;
+  limit?: number;
+  offset?: number;
+}
+
+export async function listJobs(f: ListJobsFilter): Promise<FleetJobDoc[]> {
+  const filter: Record<string, string> = { productId: f.productId };
+  if (f.stage) filter.stage = f.stage;
+  if (f.idempotencyKey) filter.idempotencyKey = f.idempotencyKey;
+  return jobs().findMany({
+    filter,
+    sort: { priorityOrder: 1, createdAt: 1 },
+    offset: f.offset,
+    limit: f.limit,
+  });
+}
+
+/** All jobs for a product sharing an idempotency-key (dedupe lookups). */
+export async function findJobsByIdempotencyKey(
+  productId: string,
+  idempotencyKey: string
+): Promise<FleetJobDoc[]> {
+  return jobs().findMany({ filter: { productId, idempotencyKey } });
+}
+
+/** Unconditional merge update (use only when concurrency is not contended). */
+export async function updateJob(
+  id: string,
+  productId: string,
+  updates: Partial<FleetJobDoc>
+): Promise<FleetJobDoc | null> {
+  const cur = await jobs().findById(id, productId);
+  if (!cur) return null;
+  return jobs().update(id, productId, {
+    ...updates,
+    rev: (cur.rev ?? 0) + 1,
+    updatedAt: new Date().toISOString(),
+  });
+}
+
+/** Compare-and-swap on `rev` — the atomic-claim / fenced-transition primitive. */
+export async function revUpdateJob(
+  id: string,
+  productId: string,
+  expectedRev: number,
+  updates: Partial<FleetJobDoc>
+): Promise<RevResult<FleetJobDoc>> {
+  const cur = await jobs().findById(id, productId);
+  if (!cur) return { ok: false, reason: 'not_found' };
+  if ((cur.rev ?? 0) !== expectedRev) return { ok: false, reason: 'conflict' };
+  const doc = await jobs().update(id, productId, {
+    ...updates,
+    rev: expectedRev + 1,
+    updatedAt: new Date().toISOString(),
+  });
+  return { ok: true, doc };
+}
+
+export async function deleteJob(id: string, productId: string): Promise<void> {
+  await jobs().delete(id, productId);
+}
+
+// ── Runs ────────────────────────────────────────────────────────────────────
+
+export async function createRun(doc: FleetRunDoc): Promise<FleetRunDoc> {
+  return runs().create(doc);
+}
+
+export async function updateRun(
+  id: string,
+  jobId: string,
+  updates: Partial<FleetRunDoc>
+): Promise<FleetRunDoc | null> {
+  const cur = await runs().findById(id, jobId);
+  if (!cur) return null;
+  return runs().update(id, jobId, updates);
+}
+
+export async function listRunsByJob(jobId: string): Promise<FleetRunDoc[]> {
+  return runs().findMany({ filter: { jobId }, sort: { attempt: 1 } });
+}
+
+// ── Leases ──────────────────────────────────────────────────────────────────
+
+export async function getLease(jobId: string): Promise<FleetLeaseDoc | null> {
+  return leases().findById(jobId, jobId);
+}
+
+export async function createLease(doc: FleetLeaseDoc): Promise<FleetLeaseDoc> {
+  return leases().create(doc);
+}
+
+export async function revUpdateLease(
+  jobId: string,
+  expectedRev: number,
+  updates: Partial<FleetLeaseDoc>
+): Promise<RevResult<FleetLeaseDoc>> {
+  const cur = await leases().findById(jobId, jobId);
+  if (!cur) return { ok: false, reason: 'not_found' };
+  if ((cur.rev ?? 0) !== expectedRev) return { ok: false, reason: 'conflict' };
+  const doc = await leases().update(jobId, jobId, {
+    ...updates,
+    rev: expectedRev + 1,
+    updatedAt: new Date().toISOString(),
+  });
+  return { ok: true, doc };
+}
+
+export async function listExpiredLeases(nowIso: string): Promise<FleetLeaseDoc[]> {
+  return leases().findMany({
+    filter: { status: 'held', expiresAt: { $lt: nowIso } },
+  });
+}
+
+// ── Factories ─────────────────────────────────────────────────────────────────
+
+export async function getFactory(
+  factoryId: string,
+  productId: string
+): Promise<FleetFactoryDoc | null> {
+  return factories().findById(factoryId, productId);
+}
+
+export async function upsertFactory(doc: FleetFactoryDoc): Promise<FleetFactoryDoc> {
+  return factories().upsert(doc);
+}
+
+export async function listFactories(productId: string): Promise<FleetFactoryDoc[]> {
+  return factories().findMany({ filter: { productId } });
+}
+
+// ── Profiles ────────────────────────────────────────────────────────────────
+
+export async function createProfile(doc: FleetProfileDoc): Promise<FleetProfileDoc> {
+  return profiles().create(doc);
+}
+
+export async function getProfile(id: string, productId: string): Promise<FleetProfileDoc | null> {
+  return profiles().findById(id, productId);
+}
+
+export async function listProfiles(productId: string): Promise<FleetProfileDoc[]> {
+  return profiles().findMany({ filter: { productId } });
+}
+
+// ── Events (append-only) ────────────────────────────────────────────────────
+
+export interface AppendEventInput {
+  jobId: string;
+  productId: string;
+  type: string;
+  actor?: string;
+  data?: Record<string, unknown>;
+}
+
+/** Append an ordered event to a job's stream; `seq` is monotonic per job. */
+export async function appendEvent(input: AppendEventInput): Promise<FleetEventDoc> {
+  const existing = await events().findMany({ filter: { jobId: input.jobId } });
+  const seq = existing.length;
+  const doc: FleetEventDoc = {
+    id: `${input.jobId}:evt:${seq}`,
+    productId: input.productId,
+    jobId: input.jobId,
+    seq,
+    type: input.type,
+    at: new Date().toISOString(),
+    actor: input.actor,
+    data: input.data ?? {},
+  };
+  return events().create(doc);
+}
+
+export async function listEvents(jobId: string): Promise<FleetEventDoc[]> {
+  const docs = await events().findMany({ filter: { jobId }, sort: { seq: 1 } });
+  return docs;
+}
+
+// ── Artifacts ─────────────────────────────────────────────────────────────────
+
+export async function createArtifact(doc: FleetArtifactDoc): Promise<FleetArtifactDoc> {
+  return artifacts().create(doc);
+}
+
+export async function listArtifacts(jobId: string): Promise<FleetArtifactDoc[]> {
+  return artifacts().findMany({ filter: { jobId }, sort: { createdAt: 1 } });
+}