diff --git a/services/platform-service/src/modules/fleet/repository.ts b/services/platform-service/src/modules/fleet/repository.ts
index dfc95547..905bdbe1 100644
--- a/services/platform-service/src/modules/fleet/repository.ts
+++ b/services/platform-service/src/modules/fleet/repository.ts
@@ -138,6 +138,24 @@ export async function deleteJob(id: string, productId: string): Promise<void> {
   await jobs().delete(id, productId);
 }
 
+/**
+ * Record the last tracker Item status echoed for a job (§10 round-trip idempotency).
+ * Deliberately does NOT bump `rev` — it is bookkeeping for the downstream echo, not a
+ * lifecycle transition, so it never interferes with the coordinator's fenced CAS.
+ */
+export async function setTrackerEchoedStatus(
+  id: string,
+  productId: string,
+  status: string
+): Promise<FleetJobDoc | null> {
+  const cur = await jobs().findById(id, productId);
+  if (!cur) return null;
+  return jobs().update(id, productId, {
+    trackerEchoedStatus: status,
+    updatedAt: new Date().toISOString(),
+  });
+}
+
 // ── Runs ────────────────────────────────────────────────────────────────────
 
 export async function createRun(doc: FleetRunDoc): Promise<FleetRunDoc> {
diff --git a/services/platform-service/src/modules/fleet/routes.ts b/services/platform-service/src/modules/fleet/routes.ts
index 3e6144ef..b1405566 100644
--- a/services/platform-service/src/modules/fleet/routes.ts
+++ b/services/platform-service/src/modules/fleet/routes.ts
@@ -27,6 +27,7 @@ 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 * as trackerBridge from './tracker-bridge.js';
 import {
   SubmitJobSchema,
   ListJobsQuerySchema,
@@ -39,6 +40,8 @@ import {
   EnrollFactorySchema,
   RotateTokenSchema,
   RevokeTokenSchema,
+  IngestItemSchema,
+  EchoJobSchema,
 } from './types.js';
 
 function badRequest(issues: { message: string }[]): never {
@@ -99,6 +102,9 @@ export async function fleetRoutes(app: FastifyInstance) {
       }
       throw new ConflictError('concurrent update conflict — retry');
     }
+    // §10: opt-in (FLEET_TRACKER_ECHO, default OFF) downstream echo of the new
+    // stage to the linked tracker Item. Never blocks/fails the transition.
+    await trackerBridge.maybeEchoOnTransition(pid, id, req.log);
     return res.doc;
   });
 
@@ -160,6 +166,8 @@ export async function fleetRoutes(app: FastifyInstance) {
       if (res.reason === 'fenced') throw new ConflictError('stale leaseEpoch — release fenced');
       throw new ConflictError('lease release conflict — retry');
     }
+    // §10: release often carries a terminal stage (shipped/failed) — echo it (opt-in).
+    if (parsed.data.stage) await trackerBridge.maybeEchoOnTransition(pid, id, req.log);
     return res.doc;
   });
 
@@ -313,4 +321,26 @@ export async function fleetRoutes(app: FastifyInstance) {
     });
     return { revoked };
   });
+
+  // ── Tracker bridge (§10): ingest an Item as a job (idempotent, scheduled by §7) ──
+  app.post('/fleet/tracker/ingest', async (req, reply) => {
+    await extractAuth(req);
+    const parsed = IngestItemSchema.safeParse(req.body);
+    if (!parsed.success) badRequest(parsed.error.issues);
+    const pid = getRequestProductId(req);
+    const result = await trackerBridge.ingestItemAsJob(pid, parsed.data.itemId, {
+      priority: parsed.data.priority,
+    });
+    reply.code(result.outcome === 'created' ? 201 : 200);
+    return { outcome: result.outcome, job: result.job };
+  });
+
+  // ── Tracker bridge (§10): manually echo a job's current outcome to its Item ──
+  app.post('/fleet/tracker/echo', async req => {
+    await extractAuth(req);
+    const parsed = EchoJobSchema.safeParse(req.body);
+    if (!parsed.success) badRequest(parsed.error.issues);
+    const pid = getRequestProductId(req);
+    return trackerBridge.echoJobToItem(pid, parsed.data.jobId, req.log);
+  });
 }
diff --git a/services/platform-service/src/modules/fleet/tracker-bridge.test.ts b/services/platform-service/src/modules/fleet/tracker-bridge.test.ts
new file mode 100644
index 00000000..1483e8ca
--- /dev/null
+++ b/services/platform-service/src/modules/fleet/tracker-bridge.test.ts
@@ -0,0 +1,256 @@
+/**
+ * Tracker ↔ fleet bridge (§10) — in-process round-trip on the memory providers.
+ * Service tests call the bridge directly; route tests use Fastify inject to exercise
+ * the gated auto-echo (FLEET_TRACKER_ECHO, default OFF). Auth + productId are mocked
+ * exactly like the other fleet routes tests; NO live HTTP.
+ */
+
+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 itemsRepo from '../items/repository.js';
+import * as commentsRepo from '../comments/repository.js';
+import type { TrackerItemDoc } from '../items/types.js';
+import * as repo from './repository.js';
+import * as coordinator from './coordinator.js';
+import * as bridge from './tracker-bridge.js';
+import { SubmitJobSchema } from './types.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';
+
+function makeItem(over: Partial<TrackerItemDoc> = {}): TrackerItemDoc {
+  const now = new Date().toISOString();
+  return {
+    id: 'IT-1',
+    productId: PID,
+    type: 'task',
+    status: 'open',
+    priority: 'medium',
+    title: 'Fix the widget',
+    description: 'Do A then B.',
+    labels: [],
+    assignee: null,
+    reportedBy: 'user_1',
+    source: 'internal',
+    visibility: 'internal',
+    voteCount: 0,
+    commentCount: 0,
+    priorityOrder: 2,
+    targetRelease: null,
+    createdAt: now,
+    updatedAt: now,
+    ...over,
+  };
+}
+
+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 tracker bridge (§10)', () => {
+  beforeEach(() => {
+    setProvider(new MemoryDatastoreProvider());
+    delete process.env.FLEET_TRACKER_ECHO;
+  });
+  afterEach(() => {
+    _resetDatastoreProvider();
+    delete process.env.FLEET_TRACKER_ECHO;
+    vi.restoreAllMocks();
+  });
+
+  // ── ingest ──
+  it('ingest creates exactly one claimable job (trackerItemId, bodyMd, stable key)', async () => {
+    await itemsRepo.create(makeItem());
+    const { job, outcome } = await bridge.ingestItemAsJob(PID, 'IT-1');
+    expect(outcome).toBe('created');
+    expect(job.trackerItemId).toBe('IT-1');
+    expect(job.idempotencyKey).toBe('tracker-IT-1');
+    expect(job.bodyMd).toContain('Do A then B.');
+    expect(job.stage).toBe('queued');
+
+    // claimable through the normal scheduler path (claim unchanged)
+    const claim = await coordinator.claimNextJob({
+      productId: PID,
+      factoryId: 'fac_1',
+      capabilities: [],
+      leaseSeconds: 900,
+    });
+    expect(claim?.job.id).toBe(job.id);
+  });
+
+  it('ingest maps labels → priority + capabilities', async () => {
+    await itemsRepo.create(
+      makeItem({ labels: ['engine-class:agentic-coder', 'priority:high', 'cap:os:mac'] })
+    );
+    const { job } = await bridge.ingestItemAsJob(PID, 'IT-1');
+    expect(job.priority).toBe('high');
+    expect(job.capabilities).toEqual(['os:mac']);
+    expect(job.engineClass).toBe('agentic-coder');
+  });
+
+  it('ingest is idempotent (same Item twice → one job, deduplicated)', async () => {
+    await itemsRepo.create(makeItem());
+    const first = await bridge.ingestItemAsJob(PID, 'IT-1');
+    const second = await bridge.ingestItemAsJob(PID, 'IT-1');
+    expect(second.outcome).toBe('deduplicated');
+    expect(second.job.id).toBe(first.job.id);
+    const all = await repo.findJobsByIdempotencyKey(PID, 'tracker-IT-1');
+    expect(all).toHaveLength(1);
+  });
+
+  it('ingest for a foreign productId → not found (isolation)', async () => {
+    await itemsRepo.create(makeItem());
+    await expect(bridge.ingestItemAsJob('other-product', 'IT-1')).rejects.toThrow(/not found/i);
+  });
+
+  // ── echo ──
+  it('echo round-trip: queued→building→shipped drives Item in_progress→done with metrics-only notes', async () => {
+    await itemsRepo.create(makeItem({ description: 'SECRET-BODY-SENTINEL do the work' }));
+    const { job } = await bridge.ingestItemAsJob(PID, 'IT-1');
+
+    const e1 = await bridge.echoJobToItem(PID, job.id);
+    expect(e1.echoed).toBe('in_progress');
+    expect((await itemsRepo.getById('IT-1'))?.status).toBe('in_progress');
+
+    await repo.updateJob(job.id, PID, { stage: 'shipped' });
+    const e2 = await bridge.echoJobToItem(PID, job.id);
+    expect(e2.echoed).toBe('done');
+    expect((await itemsRepo.getById('IT-1'))?.status).toBe('done');
+
+    // metrics-only comments — never the prompt body
+    const comments = await commentsRepo.listByItem('IT-1');
+    expect(comments.length).toBeGreaterThanOrEqual(2);
+    for (const c of comments) {
+      expect(c.body).not.toContain('SECRET-BODY-SENTINEL');
+      expect(c.body).toContain('attempts=');
+    }
+  });
+
+  it('echo failed → Item wont_fix (the Item vocabulary has no "blocked")', async () => {
+    await itemsRepo.create(makeItem());
+    const { job } = await bridge.ingestItemAsJob(PID, 'IT-1');
+    await repo.updateJob(job.id, PID, { stage: 'failed' });
+    const res = await bridge.echoJobToItem(PID, job.id);
+    expect(res.echoed).toBe('wont_fix');
+    expect((await itemsRepo.getById('IT-1'))?.status).toBe('wont_fix');
+  });
+
+  it('echo is idempotent (re-echo of an unchanged stage → no duplicate Item write)', async () => {
+    await itemsRepo.create(makeItem());
+    const { job } = await bridge.ingestItemAsJob(PID, 'IT-1');
+    await bridge.echoJobToItem(PID, job.id);
+    const after1 = (await itemsRepo.getById('IT-1'))?.commentCount;
+    const res = await bridge.echoJobToItem(PID, job.id);
+    expect(res.echoed).toBe('in_progress');
+    const after2 = (await itemsRepo.getById('IT-1'))?.commentCount;
+    expect(after2).toBe(after1); // no extra comment written
+    expect(await commentsRepo.listByItem('IT-1')).toHaveLength(after1 ?? 0);
+  });
+
+  it('echo is non-fatal: an items-write failure → { echoed: null, error }, job untouched', async () => {
+    await itemsRepo.create(makeItem());
+    const { job } = await bridge.ingestItemAsJob(PID, 'IT-1');
+    vi.spyOn(itemsRepo, 'update').mockRejectedValueOnce(new Error('cosmos down'));
+    const res = await bridge.echoJobToItem(PID, job.id);
+    expect(res.echoed).toBeNull();
+    expect(res.error).toMatch(/cosmos down/);
+    // job state untouched: not marked echoed, still queued
+    const after = await repo.getJob(job.id, PID);
+    expect(after?.trackerEchoedStatus).toBeUndefined();
+    expect(after?.stage).toBe('queued');
+  });
+
+  it('echo no-op for a job with no trackerItemId', async () => {
+    const { job } = await coordinator.submitJob(
+      PID,
+      SubmitJobSchema.parse({ idempotencyKey: 'plain', bodyMd: '# t' })
+    );
+    const res = await bridge.echoJobToItem(PID, job.id);
+    expect(res.echoed).toBeNull();
+  });
+
+  // ── route + flag gating ──
+  it('auto-echo OFF (default flag): a PATCH transition performs ZERO items writes', async () => {
+    await itemsRepo.create(makeItem());
+    const app = await buildApp();
+    const ingest = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/tracker/ingest',
+      payload: { itemId: 'IT-1' },
+    });
+    expect(ingest.statusCode).toBe(201);
+    const jobId = JSON.parse(ingest.body).job.id as string;
+
+    const claim = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      payload: { factoryId: 'fac_1', capabilities: [] },
+    });
+    const leaseEpoch = JSON.parse(claim.body).job.leaseEpoch as number;
+
+    const patch = await app.inject({
+      method: 'PATCH',
+      url: `/api/fleet/jobs/${jobId}`,
+      payload: { stage: 'building', leaseEpoch },
+    });
+    expect(patch.statusCode).toBe(200);
+    // flag OFF ⇒ Item untouched, no comments
+    expect((await itemsRepo.getById('IT-1'))?.status).toBe('open');
+    expect(await commentsRepo.listByItem('IT-1')).toHaveLength(0);
+  });
+
+  it('auto-echo ON (FLEET_TRACKER_ECHO=1): a PATCH transition echoes to the Item', async () => {
+    await itemsRepo.create(makeItem());
+    const app = await buildApp();
+    const ingest = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/tracker/ingest',
+      payload: { itemId: 'IT-1' },
+    });
+    const jobId = JSON.parse(ingest.body).job.id as string;
+    const claim = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/claim',
+      payload: { factoryId: 'fac_1', capabilities: [] },
+    });
+    const leaseEpoch = JSON.parse(claim.body).job.leaseEpoch as number;
+
+    process.env.FLEET_TRACKER_ECHO = '1';
+    const patch = await app.inject({
+      method: 'PATCH',
+      url: `/api/fleet/jobs/${jobId}`,
+      payload: { stage: 'building', leaseEpoch },
+    });
+    expect(patch.statusCode).toBe(200);
+    expect((await itemsRepo.getById('IT-1'))?.status).toBe('in_progress');
+  });
+
+  it('manual echo route returns the echoed status', async () => {
+    await itemsRepo.create(makeItem());
+    const app = await buildApp();
+    const ingest = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/tracker/ingest',
+      payload: { itemId: 'IT-1' },
+    });
+    const jobId = JSON.parse(ingest.body).job.id as string;
+    const echo = await app.inject({
+      method: 'POST',
+      url: '/api/fleet/tracker/echo',
+      payload: { jobId },
+    });
+    expect(echo.statusCode).toBe(200);
+    expect(JSON.parse(echo.body).echoed).toBe('in_progress');
+  });
+});
diff --git a/services/platform-service/src/modules/fleet/tracker-bridge.ts b/services/platform-service/src/modules/fleet/tracker-bridge.ts
new file mode 100644
index 00000000..63955c7b
--- /dev/null
+++ b/services/platform-service/src/modules/fleet/tracker-bridge.ts
@@ -0,0 +1,241 @@
+/**
+ * Tracker ↔ fleet bridge (§10 / §24.5) — the in-process, no-shell-hop round-trip.
+ *
+ * `ingestItemAsJob` turns a tracker Item into a fleet job submitted through the
+ * coordinator (so it is scheduled by the §7 router like any other job), reusing the
+ * existing `trackerItemId` field + a stable idempotency-key so re-ingest dedupes.
+ *
+ * `echoJobToItem` mirrors the job's lifecycle back onto the Item (status + a
+ * metrics-only comment). Echo is BEST-EFFORT and downstream: an items-write failure
+ * is surfaced as `{ echoed: null, error }` and is NEVER allowed to fail the job.
+ *
+ * This module calls the items + comments + fleet repositories DIRECTLY — no HTTP,
+ * no Fastify types here.
+ */
+
+import { randomUUID } from 'node:crypto';
+import { NotFoundError } from '../../lib/errors.js';
+import * as itemsRepo from '../items/repository.js';
+import * as commentsRepo from '../comments/repository.js';
+import type { ItemStatus, TrackerItemDoc } from '../items/types.js';
+import * as repo from './repository.js';
+import * as coordinator from './coordinator.js';
+import type { SubmitResult } from './coordinator.js';
+import {
+  FLEET_ENGINE_CLASSES,
+  FLEET_PRIORITIES,
+  SubmitJobSchema,
+  type FleetEngineClass,
+  type FleetJobDoc,
+  type FleetPriority,
+  type FleetStage,
+} from './types.js';
+
+/** Minimal logger shape (pino/req.log compatible) — keeps Fastify out of this module. */
+export interface BridgeLogger {
+  error: (obj: unknown, msg?: string) => void;
+}
+
+/** Config flag (default OFF): auto-echo on server-side stage transitions. */
+export function trackerEchoEnabled(): boolean {
+  const v = (process.env.FLEET_TRACKER_ECHO ?? '').trim().toLowerCase();
+  return v === '1' || v === 'true' || v === 'yes' || v === 'on';
+}
+
+// ── Item → job ────────────────────────────────────────────────────────────────
+
+interface LabelHints {
+  priority?: FleetPriority;
+  engineClass?: FleetEngineClass;
+  profile?: string;
+  capabilities: string[];
+}
+
+/** Parse manifest hints carried as Item labels: engine-class:/profile:/priority:/cap:. */
+function parseLabelHints(labels: string[]): LabelHints {
+  const hints: LabelHints = { capabilities: [] };
+  for (const raw of labels) {
+    const label = raw.trim();
+    if (label.startsWith('engine-class:')) {
+      const v = label.slice('engine-class:'.length);
+      if ((FLEET_ENGINE_CLASSES as readonly string[]).includes(v))
+        hints.engineClass = v as FleetEngineClass;
+    } else if (label.startsWith('profile:')) {
+      hints.profile = label.slice('profile:'.length);
+    } else if (label.startsWith('priority:')) {
+      const v = label.slice('priority:'.length);
+      if ((FLEET_PRIORITIES as readonly string[]).includes(v)) hints.priority = v as FleetPriority;
+    } else if (label.startsWith('cap:')) {
+      const v = label.slice('cap:'.length);
+      if (v) hints.capabilities.push(v);
+    }
+  }
+  return hints;
+}
+
+function coerceItemPriority(p: string): FleetPriority | undefined {
+  return (FLEET_PRIORITIES as readonly string[]).includes(p) ? (p as FleetPriority) : undefined;
+}
+
+/** Stable, idempotent derived key so re-ingesting the same Item never duplicates. */
+export function trackerIdempotencyKey(itemId: string): string {
+  return `tracker-${itemId}`;
+}
+
+export interface IngestOptions {
+  /** Override the derived priority (else label hint, else the Item's own priority). */
+  priority?: FleetPriority;
+}
+
+/**
+ * Read a tracker Item and submit it as a fleet job (idempotent on
+ * `tracker-<itemId>`). Foreign productId / unknown item ⇒ NotFoundError.
+ */
+export async function ingestItemAsJob(
+  productId: string,
+  itemId: string,
+  opts?: IngestOptions
+): Promise<SubmitResult> {
+  const item = await itemsRepo.getById(itemId);
+  if (!item || item.productId !== productId) {
+    throw new NotFoundError(`tracker item '${itemId}' not found`);
+  }
+
+  const hints = parseLabelHints(item.labels);
+  const priority =
+    opts?.priority ?? hints.priority ?? coerceItemPriority(item.priority) ?? 'medium';
+  const description = item.description?.trim() ?? '';
+  const bodyMd = description ? `# ${item.title}\n\n${item.description}` : `# ${item.title}`;
+
+  const input = SubmitJobSchema.parse({
+    idempotencyKey: trackerIdempotencyKey(itemId),
+    bodyMd,
+    priority,
+    capabilities: hints.capabilities,
+    engineClass: hints.engineClass,
+    profile: hints.profile,
+    trackerItemId: itemId,
+  });
+
+  return coordinator.submitJob(productId, input);
+}
+
+// ── Job → Item (one-way echo, §24.5) ───────────────────────────────────────────
+
+export interface EchoResult {
+  echoed: ItemStatus | null;
+  error?: string;
+}
+
+/**
+ * Map a fleet stage to a tracker Item status (full lifecycle, both directions).
+ * The Item vocabulary has no `blocked`, so a terminal failure maps to `wont_fix`.
+ */
+export function stageToItemStatus(stage: FleetStage): ItemStatus {
+  switch (stage) {
+    case 'shipped':
+      return 'done';
+    case 'failed':
+    case 'dead_letter':
+      return 'wont_fix';
+    default:
+      // queued | blocked | assigned | building | review | testing
+      return 'in_progress';
+  }
+}
+
+async function writeMetricsComment(
+  job: FleetJobDoc,
+  item: TrackerItemDoc,
+  status: ItemStatus
+): Promise<void> {
+  const runs = await repo.listRunsByJob(job.id);
+  const latest = runs[runs.length - 1];
+  // Metrics ONLY — never the prompt body (job.bodyMd) or any secret.
+  const parts: string[] = [
+    `agent-queue fleet: job ${job.id} → ${job.stage} (item status=${status}).`,
+    `attempts=${job.attempts}.`,
+  ];
+  if (latest?.startedAt && latest?.endedAt) {
+    const dur = Math.max(
+      0,
+      Math.round((Date.parse(latest.endedAt) - Date.parse(latest.startedAt)) / 1000)
+    );
+    if (Number.isFinite(dur)) parts.push(`duration=${dur}s.`);
+  }
+  const ins = latest?.insights;
+  if (ins) {
+    if (ins.tokensIn !== undefined || ins.tokensOut !== undefined) {
+      parts.push(`tokens=${ins.tokensIn ?? 0}/${ins.tokensOut ?? 0}.`);
+    }
+    if (ins.costUsd !== undefined) parts.push(`cost_usd=${ins.costUsd}.`);
+  }
+  const now = new Date().toISOString();
+  await commentsRepo.create({
+    id: `cmt_${randomUUID()}`,
+    itemId: item.id,
+    productId: item.productId,
+    authorId: 'fleet-coordinator',
+    authorEmail: null,
+    body: parts.join(' '),
+    createdAt: now,
+    updatedAt: now,
+  });
+  await itemsRepo.incrementCommentCount(item.id, 1);
+}
+
+/**
+ * Echo a job's current stage onto its linked Item (status + metrics comment).
+ * No trackerItemId ⇒ `{ echoed: null }`. Idempotent: an unchanged outcome is a
+ * no-op. An items-write failure is non-fatal ⇒ `{ echoed: null, error }`.
+ * A missing/foreign job throws NotFoundError (productId isolation).
+ */
+export async function echoJobToItem(
+  productId: string,
+  jobId: string,
+  log?: BridgeLogger
+): Promise<EchoResult> {
+  const job = await repo.getJob(jobId, productId);
+  if (!job) throw new NotFoundError(`fleet job '${jobId}' not found`);
+  if (!job.trackerItemId) return { echoed: null };
+
+  const status = stageToItemStatus(job.stage);
+  if (job.trackerEchoedStatus === status) return { echoed: status };
+
+  try {
+    const item = await itemsRepo.getById(job.trackerItemId);
+    if (!item || item.productId !== productId) {
+      return { echoed: null, error: `linked item '${job.trackerItemId}' not found for product` };
+    }
+    await itemsRepo.update(job.trackerItemId, { status });
+    await writeMetricsComment(job, item, status);
+    await repo.setTrackerEchoedStatus(jobId, productId, status);
+    return { echoed: status };
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    log?.error(
+      { jobId, itemId: job.trackerItemId, error: message },
+      'fleet tracker echo failed (non-fatal)'
+    );
+    return { echoed: null, error: message };
+  }
+}
+
+/**
+ * Opt-in (FLEET_TRACKER_ECHO) best-effort echo invoked after a server-side stage
+ * transition. Flag OFF ⇒ no-op (zero items writes). Never throws into the caller's
+ * transition path.
+ */
+export async function maybeEchoOnTransition(
+  productId: string,
+  jobId: string,
+  log?: BridgeLogger
+): Promise<void> {
+  if (!trackerEchoEnabled()) return;
+  try {
+    await echoJobToItem(productId, jobId, log);
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    log?.error({ jobId, error: message }, 'fleet tracker auto-echo failed (non-fatal)');
+  }
+}
diff --git a/services/platform-service/src/modules/fleet/types.ts b/services/platform-service/src/modules/fleet/types.ts
index a6eb5f86..ed644902 100644
--- a/services/platform-service/src/modules/fleet/types.ts
+++ b/services/platform-service/src/modules/fleet/types.ts
@@ -160,6 +160,12 @@ export const FleetJobDocSchema = z.object({
   leaseEpoch: z.number().int().nonnegative().default(0),
   rev: z.number().int().nonnegative().default(0),
   blockedReason: z.string().optional(),
+  /**
+   * Last Item status echoed to the linked tracker Item (§10 round-trip). Used to
+   * make re-echo of an unchanged outcome a no-op. Optional + provider-managed —
+   * absent on jobs that were never echoed / have no trackerItemId.
+   */
+  trackerEchoedStatus: z.string().optional(),
   createdAt: z.string(),
   updatedAt: z.string(),
 });
@@ -392,3 +398,16 @@ export const RevokeTokenSchema = z.object({
   tokenId: z.string().min(1).optional(),
 });
 export type RevokeTokenInput = z.infer<typeof RevokeTokenSchema>;
+
+/** Tracker bridge (§10): ingest a tracker Item as a fleet job. */
+export const IngestItemSchema = z.object({
+  itemId: z.string().min(1),
+  priority: z.enum(FLEET_PRIORITIES).optional(),
+});
+export type IngestItemInput = z.infer<typeof IngestItemSchema>;
+
+/** Tracker bridge (§10): manually echo a job's current outcome to its Item. */
+export const EchoJobSchema = z.object({
+  jobId: z.string().min(1),
+});
+export type EchoJobInput = z.infer<typeof EchoJobSchema>;