feat: enforce realtime delegation audience on the message socket

The socket used to accept any valid token, so a full REST/actor token could open the live stream. Now it can require a narrowly-scoped delegated token (aud=iios-message), so a leaked socket token can't drive privileged REST, and vice-versa. - MessagePrincipal gains `audience`, surfaced from both verify paths (OIDC aud, and the app-token `aud` claim). - message.gateway: when IIOS_REALTIME_AUDIENCE is set, handleConnection accepts only a token whose aud matches (opt-in, like IIOS_REQUIRE_ATTESTATION; unset = no change). - spec: verifier surfaces aud; gateway accepts iios-message, rejects iios-core / no-aud when enforcing, passes through when off. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
feat: verify context attestations via ES256/JWKS + rename client to appshell-crm
2026-07-15 12:56:19 +05:30 · 2026-07-15 12:56:10 +05:30 · 2026-07-13 23:26:33 +05:30 · 2026-07-13 21:28:37 +05:30 · 2026-07-13 21:03:45 +05:30 · 2026-07-13 20:49:40 +05:30
28 changed files with 1250 additions and 61 deletions
@@ -1,6 +1,6 @@
 {
  "name": "@insignia/iios-kernel-client",
-  "version": "0.1.0",
+  "version": "0.1.4",
  "type": "module",
  "main": "dist/index.js",
  "module": "dist/index.js",
@@ -8,14 +8,14 @@ export interface MessageSocketConfig {
 }

 /**
- * Framework-agnostic facade over the `/message` Socket.io namespace (ports the
- * support-sdk MessageClient). No socket.io types leak out; RPCs use emitWithAck.
- * On reconnect it re-opens the current thread so subscriptions resume with no
- * lost messages (the docs' disconnect/reconnect requirement).
+ * Framework-agnostic facade over the `/message` Socket.io namespace. No socket.io
+ * types leak out; RPCs use emitWithAck. It tracks EVERY joined thread and re-opens
+ * all of them on reconnect (the docs' disconnect/reconnect requirement), so a UI
+ * that watches multiple conversations keeps receiving live messages after a drop.
 */
 export class MessageSocket {
  private readonly socket: SocketLike;
-  private currentThreadId: string | null = null;
+  private readonly joined = new Set<string>();

  constructor(config: MessageSocketConfig, socket?: SocketLike) {
    this.socket =
@@ -26,9 +26,9 @@ export class MessageSocket {
        autoConnect: config.autoConnect ?? true,
      }) as unknown as SocketLike);

-    // Re-open the active thread after a reconnect.
+    // Re-subscribe to every joined thread after a reconnect.
    this.socket.on('connect', () => {
-      if (this.currentThreadId) void this.socket.emitWithAck('open_thread', { threadId: this.currentThreadId });
+      for (const id of this.joined) void this.socket.emitWithAck('open_thread', { threadId: id });
    });
  }

@@ -40,27 +40,70 @@ export class MessageSocket {
    this.socket.disconnect();
  }

+  /** Run `handler` on every (re)connect, and immediately if already connected. */
+  onConnected(handler: () => void): () => void {
+    this.socket.on('connect', handler);
+    if (this.socket.connected) handler();
+    return () => this.socket.off('connect', handler);
+  }
+
  /** Subscribe to a server event; returns an unsubscribe fn. */
  on<E extends keyof MessageEvents>(event: E, handler: MessageEvents[E]): () => void {
    const fn = handler as (...args: unknown[]) => void;
-    this.socket.on(event, fn);
-    return () => this.socket.off(event, fn);
+    this.socket.on(event as string, fn);
+    return () => this.socket.off(event as string, fn);
  }

-  async openThread(threadId?: string): Promise<OpenThreadResult> {
-    const result = (await this.socket.emitWithAck('open_thread', { threadId })) as OpenThreadResult;
-    this.currentThreadId = result.threadId;
+  async openThread(
+    threadId?: string,
+    opts?: { membership?: string; creatorRole?: string; subject?: string },
+  ): Promise<OpenThreadResult> {
+    // Timeout (when the transport supports it) so a server error that never acks
+    // can't hang the caller forever.
+    const ack = this.socket.timeout ? this.socket.timeout(8000) : this.socket;
+    const result = (await ack.emitWithAck('open_thread', { threadId, ...opts })) as OpenThreadResult & { error?: string };
+    if (result?.error) throw new Error(result.error);
+    this.joined.add(result.threadId);
    return result;
  }

-  async sendMessage(threadId: string, content: string, opts?: { contentRef?: string }): Promise<Message> {
+  async sendMessage(
+    threadId: string,
+    content: string,
+    opts?: {
+      contentRef?: string;
+      parentInteractionId?: string;
+      mentions?: string[];
+      attachment?: { contentRef: string; mimeType: string; sizeBytes: number; checksumSha256?: string };
+    },
+  ): Promise<Message> {
    return (await this.socket.emitWithAck('send_message', {
      threadId,
      content,
-      contentRef: opts?.contentRef,
+      contentRef: opts?.attachment?.contentRef ?? opts?.contentRef,
+      mimeType: opts?.attachment?.mimeType,
+      sizeBytes: opts?.attachment?.sizeBytes,
+      checksumSha256: opts?.attachment?.checksumSha256,
+      parentInteractionId: opts?.parentInteractionId,
+      mentions: opts?.mentions, // opaque userId notify-list; the app parses "@", not the kernel
    })) as Message;
  }

+  /** Pin a message in the thread (shared, generic annotation type "pin"). */
+  async pin(threadId: string, interactionId: string): Promise<void> {
+    await this.socket.emitWithAck('annotate', { threadId, interactionId, type: 'pin', value: '' });
+  }
+
+  /** Save a message for myself (personal, generic annotation type "save"). */
+  async save(threadId: string, interactionId: string): Promise<void> {
+    await this.socket.emitWithAck('annotate', { threadId, interactionId, type: 'save', value: '' });
+  }
+
+  /** Toggle an emoji reaction on a message (a generic annotation of type "reaction"). */
+  async react(threadId: string, interactionId: string, value: string): Promise<void> {
+    await this.socket.emitWithAck('annotate', { threadId, interactionId, type: 'reaction', value });
+  }
+
  async markRead(threadId: string, interactionId: string): Promise<{ ok: boolean }> {
    return (await this.socket.emitWithAck('read', { threadId, interactionId })) as { ok: boolean };
  }
@@ -68,4 +111,9 @@ export class MessageSocket {
  typing(threadId: string): void {
    this.socket.emit('typing', { threadId });
  }
+
+  /** Tell the server which thread is in the foreground (or null when blurred) — drives presence. */
+  focus(threadId: string | null): void {
+    this.socket.emit('focus_thread', { threadId });
+  }
 }
@@ -1,9 +1,16 @@
 import type { IngestInteractionRequest } from '@insignia/iios-contracts';
-import type { Message, InboxItem, InboxState, Ticket, TicketState, CallbackRequest, RouteBinding, RouteDecision, AiArtifact, AiJobResult, Meeting, MeetingActionItem } from './types';
+import type { Message, InboxItem, InboxState, Ticket, TicketState, CallbackRequest, RouteBinding, RouteDecision, AiArtifact, AiJobResult, Meeting, MeetingActionItem, ThreadSummary, SavedItem, LoginResult } from './types';

 export interface RestConfig {
  serviceUrl: string;
  token?: string;
+  /**
+   * Extra headers for every request — e.g. `x-context-attestation` (the July 12 trust proof).
+   * Pass a FUNCTION to mint fresh headers per request: a context attestation carries a single-use
+   * nonce, so a static header would be replay-rejected on the 2nd call. The function is invoked
+   * once per request.
+   */
+  headers?: Record<string, string> | (() => Record<string, string>);
 }

 /** REST/polling client for kernel reads and the native-send fallback. */
@@ -15,7 +22,8 @@ export class RestClient {
  }

  private headers(extra: Record<string, string> = {}): Record<string, string> {
-    const h: Record<string, string> = { 'content-type': 'application/json', ...extra };
+    const custom = typeof this.config.headers === 'function' ? this.config.headers() : this.config.headers;
+    const h: Record<string, string> = { 'content-type': 'application/json', ...custom, ...extra };
    if (this.config.token) h.authorization = `Bearer ${this.config.token}`;
    return h;
  }
@@ -57,12 +65,73 @@ export class RestClient {
    return (await r.json()) as InboxItem;
  }

+  // ─── auth + threads (app surface) ─────────────────────────────
+  /** Dev IdP login (POST /v1/dev/login). A real IdP issues the same JWT — this is the swap point. */
+  async login(username: string, password: string): Promise<LoginResult> {
+    const r = await fetch(this.url('/v1/dev/login'), {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify({ username, password }),
+    });
+    if (r.status === 401) throw new Error('invalid username or password');
+    if (!r.ok) throw new Error(`login failed (${r.status}) — is the service running with IIOS_DEV_TOKENS=1?`);
+    return (await r.json()) as LoginResult;
+  }
+
+  /** Dev directory: known usernames. A real app validates against its user store / MDM. */
+  async listUsers(): Promise<string[]> {
+    const r = await fetch(this.url('/v1/dev/users'), { headers: this.headers() });
+    if (!r.ok) return [];
+    return ((await r.json()) as { users: string[] }).users;
+  }
+
+  /**
+   * Server-authoritative conversation list (works cross-device, shows unread + members).
+   * `filter.metadata` narrows to threads whose opaque attribute bag matches every key/value.
+   */
+  async listThreads(filter?: { metadata?: Record<string, string> }): Promise<ThreadSummary[]> {
+    const qs = filter?.metadata
+      ? '?' + Object.entries(filter.metadata).map(([k, v]) => `metadata[${encodeURIComponent(k)}]=${encodeURIComponent(v)}`).join('&')
+      : '';
+    const r = await fetch(this.url(`/v1/threads${qs}`), { headers: this.headers() });
+    if (!r.ok) throw new Error(`listThreads ${r.status}`);
+    return (await r.json()) as ThreadSummary[];
+  }
+
+  /** Create a thread with generic app attributes (membership/creator role/subject + an opaque metadata bag). */
+  async createThread(opts: { membership?: string; creatorRole?: string; subject?: string; metadata?: Record<string, unknown> }): Promise<{ threadId: string }> {
+    return this.post<{ threadId: string }>('/v1/threads', opts);
+  }
+
+  /** My saved messages (personal bookmarks), newest first, with thread context. */
+  async listSaved(): Promise<SavedItem[]> {
+    const r = await fetch(this.url('/v1/threads/my-annotations?type=save'), { headers: this.headers() });
+    if (!r.ok) throw new Error(`listSaved ${r.status}`);
+    return (await r.json()) as SavedItem[];
+  }
+
+  /** Governed add-participant. A policy 403 (e.g. DM cap) surfaces its reason. */
+  async addParticipant(threadId: string, userId: string): Promise<void> {
+    const r = await fetch(this.url(`/v1/threads/${threadId}/participants`), {
+      method: 'POST',
+      headers: this.headers(),
+      body: JSON.stringify({ userId }),
+    });
+    if (r.ok) return;
+    const body = (await r.json().catch(() => ({}))) as { message?: string };
+    throw new Error(body.message ?? `could not add member (${r.status})`);
+  }
+
  // ─── support ──────────────────────────────────────────────────
-  async createTicket(body: { subject: string; priority?: string; threadId?: string }): Promise<Ticket> {
+  async createTicket(body: { subject: string; priority?: string; threadId?: string; metadata?: Record<string, unknown> }): Promise<Ticket> {
    return this.post<Ticket>('/v1/support/tickets', body);
  }
-  async escalate(threadId: string, subject?: string): Promise<Ticket> {
-    return this.post<Ticket>('/v1/support/escalate', { threadId, subject });
+  async escalate(threadId: string, subject?: string, metadata?: Record<string, unknown>): Promise<Ticket> {
+    return this.post<Ticket>('/v1/support/escalate', { threadId, subject, metadata });
+  }
+  /** Manually assign a ticket to a specific user (generic assignment override). */
+  async assignTicket(id: string, userId: string): Promise<Ticket> {
+    return this.post<Ticket>(`/v1/support/tickets/${id}/assignee`, { userId });
  }
  async listTickets(scope: 'mine' | 'assigned' = 'mine'): Promise<Ticket[]> {
    const r = await fetch(this.url(`/v1/support/tickets?scope=${scope}`), { headers: this.headers() });
@@ -1,10 +1,30 @@
+/** A media/file part attached to a message (contentRef points at object storage). */
+export interface Attachment {
+  contentRef: string;
+  mimeType: string;
+  sizeBytes: number;
+  kind: 'image' | 'video' | 'audio' | 'file';
+}
+
+/** A generic annotation aggregate on a message (e.g. type "reaction", value = emoji). */
+export interface AnnotationGroup {
+  type: string;
+  value: string;
+  users: string[]; // usernames who applied it
+}
+
 /** Wire shapes the kernel emits over socket / returns over REST (align with service). */
 export interface Message {
  id: string;
  threadId: string;
  senderActorId: string;
+  senderId: string; // sender's email/username — reliable "is this mine?" check
+  senderName: string;
  content: string;
  contentRef?: string;
+  attachment?: Attachment;
+  parentInteractionId?: string;
+  annotations?: AnnotationGroup[];
  traceId?: string;
  createdAt: string;
 }
@@ -26,10 +46,50 @@ export interface TypingEvent {
  userId: string;
 }

+/** Broadcast when someone toggles an annotation — carries the refreshed user list. */
+export interface AnnotationEvent {
+  threadId: string;
+  interactionId: string;
+  type: string;
+  value: string;
+  op: 'add' | 'remove';
+  users: string[];
+  userId: string;
+}
+
 export interface MessageEvents {
  message: (m: Message) => void;
  receipt: (e: ReceiptEvent) => void;
  typing: (e: TypingEvent) => void;
+  annotation: (e: AnnotationEvent) => void;
+}
+
+/** A "my threads" entry from GET /v1/threads (server-authoritative). */
+export interface ThreadSummary {
+  threadId: string;
+  subject: string | null;
+  membership?: string; // 'dm' | 'group' (opaque app attribute)
+  /** The thread's opaque, app-supplied attribute bag — echoed verbatim; the kernel never interprets it. */
+  metadata?: Record<string, unknown> | null;
+  participants: string[]; // member usernames
+  participantCount: number;
+  unread: number;
+  muted?: boolean;
+  lastMessage?: string;
+  lastAt?: string;
+}
+
+/** A personally-saved message with its thread context (GET /v1/threads/my-annotations?type=save). */
+export interface SavedItem {
+  message: Message;
+  threadId: string;
+  threadSubject: string | null;
+}
+
+/** Result of the dev IdP login (POST /v1/dev/login). A real IdP issues the same claims. */
+export interface LoginResult {
+  token: string;
+  userId: string;
 }

 export type InboxState = 'OPEN' | 'SNOOZED' | 'DONE' | 'ARCHIVED' | 'CANCELLED' | 'STALE';
@@ -68,6 +128,8 @@ export interface Ticket {
  assignedActorId?: string | null;
  createdAt: string;
  updatedAt: string;
+  /** Opaque, app-supplied attribute bag on the ticket — echoed verbatim; the kernel never interprets it. */
+  metadata?: Record<string, unknown> | null;
  threadLinks?: Array<{ threadId: string; relationKind: string }>;
 }

@@ -188,4 +250,8 @@ export interface SocketLike {
  emitWithAck(event: string, ...args: unknown[]): Promise<unknown>;
  connect(): unknown;
  disconnect(): unknown;
+  /** True while the underlying transport is connected (socket.io exposes this). */
+  connected?: boolean;
+  /** Per-call ack timeout (socket.io). Optional so fakes can omit it. */
+  timeout?(ms: number): { emitWithAck(event: string, ...args: unknown[]): Promise<unknown> };
 }
@@ -49,3 +49,13 @@ IIOS_AI_BUDGET_UNITS=100000          # per-scope AI cost-unit budget (KG-12)
 # ── Capability providers (governed egress targets) ───────────────────────────
 # Per-channel provider endpoint the CapabilityBroker calls, e.g.:
 # IIOS_PROVIDER_URL_EMAIL=https://provider.internal/email
+
+# ── Context attestation (July 12 trust layer) ──
+# Audience IIOS requires on attestations addressed to it.
+IIOS_ATTESTATION_AUDIENCE=iios-core
+# Dev only: shared HS256 secret AppShell's stand-in signs attestations with (seeds the
+# appshell-crm client into the registry when IIOS_DEV_TOKENS=1).
+# IIOS_ATTESTATION_DEV_SECRET=appshell-dev-signing-key
+# When '1', every guarded request MUST carry a valid X-Context-Attestation (else 403).
+# Leave OFF until callers (AppShell/be-crm) forward attestations. Verified-if-present regardless.
+IIOS_REQUIRE_ATTESTATION=0
@@ -26,6 +26,7 @@
    "dotenv": "^16.4.7",
    "ioredis": "^5.11.1",
    "jsonwebtoken": "^9.0.3",
+    "jwks-rsa": "^4.1.0",
    "prisma": "^6.2.1",
    "reflect-metadata": "^0.2.2",
    "rxjs": "^7.8.2",
@@ -0,0 +1,24 @@
+-- Trust plane (July 12): context attestation client registry + nonce replay ledger.
+CREATE TABLE "IiosClientRegistry" (
+    "clientId" TEXT NOT NULL,
+    "clientType" TEXT NOT NULL,
+    "ownerService" TEXT,
+    "allowedAppIds" TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[],
+    "attestSecret" TEXT,
+    "jwksUri" TEXT,
+    "spiffeId" TEXT,
+    "status" TEXT NOT NULL DEFAULT 'ACTIVE',
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    CONSTRAINT "IiosClientRegistry_pkey" PRIMARY KEY ("clientId")
+);
+
+CREATE TABLE "IiosAttestationNonce" (
+    "nonce" TEXT NOT NULL,
+    "clientId" TEXT NOT NULL,
+    "expiresAt" TIMESTAMP(3) NOT NULL,
+    "firstSeenAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "IiosAttestationNonce_pkey" PRIMARY KEY ("nonce")
+);
+
+CREATE INDEX "IiosAttestationNonce_expiresAt_idx" ON "IiosAttestationNonce"("expiresAt");
@@ -1321,3 +1321,31 @@ model IiosDlqItem {
  @@unique([consumerName, sourceId])
  @@index([scopeId, status])
 }
+
+// ─── Trust plane (July 12) — context attestation ──────────────────
+// Registered clients/BFFs/adapters allowed to call IIOS and attest context on
+// behalf of an app. A valid actor token is NOT enough; the caller must present a
+// context attestation signed by one of these registered clients.
+model IiosClientRegistry {
+  clientId      String   @id
+  clientType    String   // APPSHELL | SUPPORT_BFF | ADAPTER | CALENDAR | SERVICE
+  ownerService  String?
+  allowedAppIds String[] // which app_ids this client may attest for
+  attestSecret  String?  // dev: shared HS256 signing key (AppShell's key stand-in)
+  jwksUri       String?  // prod: verify the attestation signature via JWKS
+  spiffeId      String?  // prod: workload identity for mTLS proof
+  status        String   @default("ACTIVE") // ACTIVE | DISABLED
+  createdAt     DateTime @default(now())
+  updatedAt     DateTime @updatedAt
+}
+
+// Single-use nonce ledger: once a context attestation's nonce is seen it can
+// never be replayed. Reserve-if-absent (unique PK) makes the check atomic.
+model IiosAttestationNonce {
+  nonce       String   @id
+  clientId    String
+  expiresAt   DateTime
+  firstSeenAt DateTime @default(now())
+
+  @@index([expiresAt])
+}
@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { PrismaModule } from './prisma/prisma.module';
 import { PlatformModule } from './platform/platform.module';
+import { AttestationModule } from './platform/attestation.module';
 import { IdentityModule } from './identity/identity.module';
 import { InteractionsModule } from './interactions/interactions.module';
 import { IdempotencyModule } from './idempotency/idempotency.module';
@@ -27,6 +28,7 @@ import { DevController } from './dev/dev.controller';
  imports: [
    PrismaModule,
    PlatformModule,
+    AttestationModule,
    IdentityModule,
    InteractionsModule,
    IdempotencyModule,
@@ -8,6 +8,9 @@ export interface MessagePrincipal {
  appId: string;
  tenantId?: string;
  displayName?: string;
+  /** The token's audience (`aud`). Used to enforce realtime delegation: a socket-scoped
+   *  token (`iios-message`) must not be a full REST/actor token (`iios-core`), and vice-versa. */
+  audience?: string;
 }

 /**
@@ -9,6 +9,10 @@ import { PolicyDeniedFilter } from './platform/policy-denied.filter';

 async function bootstrap(): Promise<void> {
  const app = await NestFactory.create(AppModule, { rawBody: true });
+  // Express 5 defaults to the 'simple' query parser, which ignores nested params like
+  // ?metadata[key]=value — so generic metadata filters would be silently dropped. Use the
+  // qs-based 'extended' parser so those parse into a nested object.
+  app.getHttpAdapter().getInstance().set('query parser', 'extended');
  app.use(traceMiddleware); // request-scoped trace context + x-trace-id header (P9)
  app.useGlobalPipes(
    new ValidationPipe({ whitelist: true, forbidNonWhitelisted: true, transform: true }),
@@ -0,0 +1,93 @@
+import { describe, it, expect, afterEach, beforeAll, afterAll } from 'vitest';
+import jwt from 'jsonwebtoken';
+import type { Socket } from 'socket.io';
+import { MessageGateway } from './message.gateway';
+import type { MessageService, MessagePrincipal } from './message.service';
+import { SessionVerifier } from '../platform/session.verifier';
+import type { OutboxBus } from '../outbox/outbox.bus';
+import type { PresenceService } from '../notifications/presence.service';
+
+// Realtime delegation: the browser opens the socket with a short-lived token minted for the
+// realtime audience (iios-message). When IIOS_REALTIME_AUDIENCE is set, the gateway accepts ONLY
+// that audience — a full REST/actor token (iios-core) or an un-scoped token can't open the stream.
+
+const APP = 'crm-web';
+const SECRET = 'dev-crm-secret';
+
+// ─── the real SessionVerifier must expose `aud` so the gateway can enforce it ───
+describe('SessionVerifier — app-token audience surfacing', () => {
+  let v: SessionVerifier;
+  beforeAll(async () => {
+    delete process.env.AUTH_ISSUERS;
+    delete process.env.SUPABASE_URL;
+    process.env.APP_SECRETS = JSON.stringify({ [APP]: SECRET });
+    v = new SessionVerifier();
+    await v.onModuleInit();
+  });
+  afterAll(() => { delete process.env.APP_SECRETS; });
+
+  it('surfaces the aud claim of a realtime-scoped token', () => {
+    const tok = jwt.sign({ appId: APP, aud: 'iios-message' }, SECRET, { algorithm: 'HS256', subject: 'pp_1', expiresIn: '5m' });
+    expect(v.verify(tok).audience).toBe('iios-message');
+  });
+
+  it('leaves audience undefined for an un-scoped token (a REST/actor token)', () => {
+    const tok = jwt.sign({ appId: APP }, SECRET, { algorithm: 'HS256', subject: 'pp_1', expiresIn: '5m' });
+    expect(v.verify(tok).audience).toBeUndefined();
+  });
+});
+
+// ─── the gateway enforces the realtime audience on connect ───
+function fakeSocket(): { sock: Socket; disconnected: () => boolean } {
+  let disconnected = false;
+  const sock = {
+    handshake: { auth: { token: 'tok' } },
+    disconnect: () => { disconnected = true; },
+    data: undefined as unknown,
+  } as unknown as Socket;
+  return { sock, disconnected: () => disconnected };
+}
+
+function gatewayReturning(principal: MessagePrincipal): MessageGateway {
+  const session = { verify: () => principal } as unknown as SessionVerifier;
+  return new MessageGateway(
+    undefined as unknown as MessageService,
+    session,
+    undefined as unknown as OutboxBus,
+    undefined as unknown as PresenceService,
+  );
+}
+
+const principal = (audience?: string): MessagePrincipal => ({ userId: 'u', appId: APP, orgId: 'org', audience });
+
+describe('MessageGateway — realtime audience enforcement', () => {
+  afterEach(() => { delete process.env.IIOS_REALTIME_AUDIENCE; });
+
+  it('accepts any valid token when enforcement is OFF (env unset)', () => {
+    const { sock, disconnected } = fakeSocket();
+    gatewayReturning(principal(undefined)).handleConnection(sock);
+    expect(disconnected()).toBe(false);
+    expect((sock.data as { principal: MessagePrincipal }).principal.userId).toBe('u');
+  });
+
+  it('accepts a token whose aud matches the required realtime audience', () => {
+    process.env.IIOS_REALTIME_AUDIENCE = 'iios-message';
+    const { sock, disconnected } = fakeSocket();
+    gatewayReturning(principal('iios-message')).handleConnection(sock);
+    expect(disconnected()).toBe(false);
+  });
+
+  it('rejects a full REST/actor token (aud=iios-core) on the socket', () => {
+    process.env.IIOS_REALTIME_AUDIENCE = 'iios-message';
+    const { sock, disconnected } = fakeSocket();
+    gatewayReturning(principal('iios-core')).handleConnection(sock);
+    expect(disconnected()).toBe(true);
+  });
+
+  it('rejects an un-scoped token (no aud) when enforcement is on', () => {
+    process.env.IIOS_REALTIME_AUDIENCE = 'iios-message';
+    const { sock, disconnected } = fakeSocket();
+    gatewayReturning(principal(undefined)).handleConnection(sock);
+    expect(disconnected()).toBe(true);
+  });
+});
@@ -61,6 +61,14 @@ export class MessageGateway implements OnGatewayInit, OnGatewayConnection, OnGat
    try {
      const token = String(client.handshake.auth?.token ?? '');
      const principal = this.session.verify(token);
+      // Realtime delegation (least privilege): when IIOS_REALTIME_AUDIENCE is set, the socket
+      // accepts ONLY a token minted for that audience (a short-lived `iios-message` delegate) —
+      // a full REST/actor token (`iios-core`) or an un-scoped token cannot open the stream. So a
+      // leaked socket token can't drive privileged REST, and vice-versa. Unset → no enforcement.
+      const required = process.env.IIOS_REALTIME_AUDIENCE?.trim();
+      if (required && principal.audience !== required) {
+        throw new Error(`realtime audience "${principal.audience ?? '(none)'}" != required "${required}"`);
+      }
      client.data = { principal } satisfies SocketState;
    } catch (err) {
      this.logger.warn(`rejecting socket: ${(err as Error).message}`);
@@ -50,6 +50,8 @@ export interface ThreadSummary {
  threadId: string;
  subject: string | null;
  membership?: string;
+  /** The thread's opaque, app-supplied attribute bag — echoed back verbatim; the kernel never interprets it. */
+  metadata?: Record<string, unknown> | null;
  participants: string[];
  participantCount: number;
  unread: number;
@@ -85,19 +87,21 @@ export class MessageService {
   * for a group. Opening an existing thread is a GOVERNED join: only an existing member may
   * re-open it (policy `iios.thread.join`) — new members enter via addParticipant.
   */
-  async openThread(threadId: string | null, principal: MessagePrincipal, opts?: { membership?: string; creatorRole?: string; subject?: string }): Promise<OpenThreadResult> {
+  async openThread(threadId: string | null, principal: MessagePrincipal, opts?: { membership?: string; creatorRole?: string; subject?: string; metadata?: Record<string, unknown> }): Promise<OpenThreadResult> {
    if (!threadId) {
      await decideOrThrow(this.ports, { action: 'iios.thread.create', scope: principal });
      const scope = await this.actors.resolveScope(principal);
      const actor = await this.actors.resolveActor(scope.id, principal);
-      // `membership`/`creatorRole`/`subject` are generic, app-supplied thread attributes — the
-      // kernel stores/echoes them but never branches on their chat meaning (that lives in policy + app).
+      // `membership`/`creatorRole`/`subject`/`metadata` are generic, app-supplied thread attributes —
+      // the kernel stores/echoes them as an opaque bag but never branches on their meaning (that lives
+      // in policy + the app). `membership` is folded into the same bag for back-compat.
+      const merged = { ...(opts?.metadata ?? {}), ...(opts?.membership ? { membership: opts.membership } : {}) };
      const thread = await this.prisma.iiosThread.create({
        data: {
          scopeId: scope.id,
          createdByActorId: actor.id,
          subject: opts?.subject?.trim() || undefined,
-          metadata: opts?.membership ? ({ membership: opts.membership } as Prisma.InputJsonValue) : undefined,
+          metadata: Object.keys(merged).length > 0 ? (merged as Prisma.InputJsonValue) : undefined,
        },
      });
      await this.actors.ensureParticipant(thread.id, actor.id, opts?.creatorRole ?? 'MEMBER');
@@ -167,8 +171,12 @@ export class MessageService {
    return { threadId, muted };
  }

-  /** Generic "my threads": every thread the caller participates in, with last message + unread. */
-  async listThreads(principal: MessagePrincipal): Promise<ThreadSummary[]> {
+  /**
+   * Generic "my threads": every thread the caller participates in, with last message + unread.
+   * An optional `filter.metadata` narrows to threads whose opaque attribute bag matches ALL of the
+   * given key/values (an equality match on the JSON bag — the kernel does not interpret the keys).
+   */
+  async listThreads(principal: MessagePrincipal, filter?: { metadata?: Record<string, string> }): Promise<ThreadSummary[]> {
    const scope = await this.actors.findScope(principal);
    if (!scope) return [];
    const actor = await this.actors.resolveActor(scope.id, principal);
@@ -177,7 +185,7 @@ export class MessageService {
    if (threadIds.length === 0) return [];
    const mutedBy = new Map(memberships.map((m) => [m.threadId, m.muted]));

-    const [threads, unreads, allParts] = await Promise.all([
+    const [allThreads, unreads, allParts] = await Promise.all([
      this.prisma.iiosThread.findMany({ where: { id: { in: threadIds } } }),
      this.prisma.iiosUnreadCounter.findMany({ where: { threadId: { in: threadIds }, actorId: actor.id } }),
      this.prisma.iiosThreadParticipant.findMany({
@@ -185,6 +193,14 @@ export class MessageService {
        include: { actor: { include: { sourceHandle: true } } },
      }),
    ]);
+    // Opaque equality filter on the metadata bag (every requested key must match).
+    const metaFilter = filter?.metadata;
+    const threads = metaFilter
+      ? allThreads.filter((t) => {
+          const bag = (t.metadata as Record<string, unknown> | null) ?? {};
+          return Object.entries(metaFilter).every(([k, v]) => bag[k] === v);
+        })
+      : allThreads;
    const unreadBy = new Map(unreads.map((u) => [u.threadId, u.unreadCount]));
    const membersBy = new Map<string, string[]>();
    for (const p of allParts) {
@@ -192,27 +208,41 @@ export class MessageService {
      membersBy.set(p.threadId, [...(membersBy.get(p.threadId) ?? []), name]);
    }

-    const summaries = await Promise.all(
-      threads.map(async (t) => {
-        const last = await this.prisma.iiosInteraction.findFirst({
-          where: { threadId: t.id },
-          orderBy: { occurredAt: 'desc' },
-          include: { parts: { where: { kind: 'TEXT' }, take: 1 } },
-        });
-        const members = membersBy.get(t.id) ?? [];
-        return {
-          threadId: t.id,
-          subject: t.subject,
-          membership: (t.metadata as { membership?: string } | null)?.membership,
-          participants: members,
-          participantCount: members.length,
-          unread: unreadBy.get(t.id) ?? 0,
-          muted: mutedBy.get(t.id) ?? false,
-          lastMessage: last?.parts[0]?.bodyText ?? undefined,
-          lastAt: last?.occurredAt,
-        };
-      }),
-    );
+    // Latest message per thread in ONE query (Postgres DISTINCT ON) instead of one findFirst
+    // per thread — a caller with many threads no longer fans out N parallel queries and
+    // exhausts the connection pool.
+    const lastRows =
+      threads.length === 0
+        ? []
+        : await this.prisma.$queryRaw<Array<{ threadId: string; occurredAt: Date; lastMessage: string | null }>>(Prisma.sql`
+            SELECT DISTINCT ON (i."threadId")
+              i."threadId"   AS "threadId",
+              i."occurredAt" AS "occurredAt",
+              (SELECT p."bodyText" FROM "IiosMessagePart" p
+                 WHERE p."interactionId" = i.id AND p.kind::text = 'TEXT'
+                 ORDER BY p."partIndex" ASC LIMIT 1) AS "lastMessage"
+            FROM "IiosInteraction" i
+            WHERE i."threadId" IN (${Prisma.join(threads.map((t) => t.id))})
+            ORDER BY i."threadId", i."occurredAt" DESC
+          `);
+    const lastBy = new Map(lastRows.map((r) => [r.threadId, r]));
+
+    const summaries = threads.map((t) => {
+      const last = lastBy.get(t.id);
+      const members = membersBy.get(t.id) ?? [];
+      return {
+        threadId: t.id,
+        subject: t.subject,
+        membership: (t.metadata as { membership?: string } | null)?.membership,
+        metadata: (t.metadata as Record<string, unknown> | null) ?? null,
+        participants: members,
+        participantCount: members.length,
+        unread: unreadBy.get(t.id) ?? 0,
+        muted: mutedBy.get(t.id) ?? false,
+        lastMessage: last?.lastMessage ?? undefined,
+        lastAt: last?.occurredAt,
+      };
+    });
    return summaries.sort((a, b) => (b.lastAt?.getTime() ?? 0) - (a.lastAt?.getTime() ?? 0));
  }

@@ -143,6 +143,23 @@ describe('Governed membership + replies (v1.1, policy-enforced)', () => {
    expect((await s.listThreads(bob))[0]?.unread).toBe(1);
  });

+  it('opaque metadata: stored on create, echoed in listThreads, and a metadata filter narrows the list', async () => {
+    const s = svc();
+    // Two threads with different opaque app attributes — the kernel never interprets these values.
+    await s.openThread(null, alice, { metadata: { source: 'crm-support', crmCustomerId: 'cust_1' } });
+    await s.openThread(null, alice, { metadata: { source: 'other' } });
+
+    const all = await s.listThreads(alice);
+    expect(all).toHaveLength(2);
+    const support = all.find((t) => (t.metadata as { source?: string } | null)?.source === 'crm-support');
+    expect(support?.metadata).toMatchObject({ source: 'crm-support', crmCustomerId: 'cust_1' });
+
+    // Equality filter on the opaque bag returns only the matching thread.
+    const filtered = await s.listThreads(alice, { metadata: { source: 'crm-support' } });
+    expect(filtered).toHaveLength(1);
+    expect(filtered[0]?.metadata).toMatchObject({ crmCustomerId: 'cust_1' });
+  });
+
  it('a reply stores + returns parentInteractionId; a cross-thread parent is ignored', async () => {
    const s = gov();
    const { threadId } = await s.openThread(null, alice, { membership: 'dm' });
@@ -0,0 +1,76 @@
+import { Injectable } from '@nestjs/common';
+import { Prisma } from '@prisma/client';
+import { JwksClient } from 'jwks-rsa';
+import { PrismaService } from '../prisma/prisma.service';
+import type {
+  ClientRegistryEntry,
+  ClientRegistryPort,
+  NonceStorePort,
+  PublicKeyResolverPort,
+} from './context-attestation';
+
+/** Client registry backed by Postgres (IiosClientRegistry). */
+@Injectable()
+export class PrismaClientRegistry implements ClientRegistryPort {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async find(clientId: string): Promise<ClientRegistryEntry | null> {
+    const r = await this.prisma.iiosClientRegistry.findUnique({ where: { clientId } });
+    if (!r) return null;
+    return {
+      clientId: r.clientId,
+      clientType: r.clientType,
+      allowedAppIds: r.allowedAppIds,
+      attestSecret: r.attestSecret ?? undefined,
+      jwksUri: r.jwksUri ?? undefined,
+      status: r.status === 'ACTIVE' ? 'ACTIVE' : 'DISABLED',
+    };
+  }
+}
+
+/**
+ * Nonce ledger backed by Postgres (IiosAttestationNonce). Reserve-if-absent is atomic via the
+ * unique primary key: a duplicate insert (P2002) means the nonce was already used → replay.
+ */
+@Injectable()
+export class PrismaNonceStore implements NonceStorePort {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async reserve(input: { nonce: string; clientId: string; expiresAt: Date }): Promise<boolean> {
+    try {
+      await this.prisma.iiosAttestationNonce.create({ data: input });
+      return true;
+    } catch (e) {
+      if (e instanceof Prisma.PrismaClientKnownRequestError && e.code === 'P2002') return false; // already seen
+      throw e;
+    }
+  }
+}
+
+/**
+ * Resolves a client's public signing key from its JWKS (prod ES256 path). Keeps ONE JwksClient
+ * per jwksUri — the client caches keys and refetches on a cache miss (so key rotation is picked up
+ * without a restart). Returns null on any failure so the verifier fails closed with NO_KEY.
+ */
+@Injectable()
+export class JwksPublicKeyResolver implements PublicKeyResolverPort {
+  private readonly clients = new Map<string, JwksClient>();
+
+  private clientFor(jwksUri: string): JwksClient {
+    let c = this.clients.get(jwksUri);
+    if (!c) {
+      c = new JwksClient({ jwksUri, cache: true, cacheMaxEntries: 8, cacheMaxAge: 10 * 60_000, rateLimit: true, jwksRequestsPerMinute: 12 });
+      this.clients.set(jwksUri, c);
+    }
+    return c;
+  }
+
+  async resolve(jwksUri: string, kid: string): Promise<string | null> {
+    try {
+      const key = await this.clientFor(jwksUri).getSigningKey(kid);
+      return key.getPublicKey(); // PEM (SPKI) — works for EC (ES256) and RSA keys
+    } catch {
+      return null; // unknown kid / unreachable JWKS / malformed key → fail closed
+    }
+  }
+}
@@ -0,0 +1,45 @@
+import { Global, Module, type OnModuleInit } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+import { ContextAttestationVerifier } from './context-attestation';
+import { PrismaClientRegistry, PrismaNonceStore, JwksPublicKeyResolver } from './attestation-stores';
+import { ContextAttestationGuard } from './context-attestation.guard';
+
+/**
+ * Wires the context-attestation trust layer into DI and exposes the guard globally so any
+ * controller can enforce the three-proof gate. Also dev-seeds a registered client so locally
+ * minted attestations verify (prod registers clients out-of-band).
+ */
+@Global()
+@Module({
+  providers: [
+    PrismaClientRegistry,
+    PrismaNonceStore,
+    JwksPublicKeyResolver,
+    {
+      provide: ContextAttestationVerifier,
+      useFactory: (reg: PrismaClientRegistry, nonces: PrismaNonceStore, keys: JwksPublicKeyResolver) =>
+        new ContextAttestationVerifier(reg, nonces, { audience: process.env.IIOS_ATTESTATION_AUDIENCE ?? 'iios-core' }, keys),
+      inject: [PrismaClientRegistry, PrismaNonceStore, JwksPublicKeyResolver],
+    },
+    ContextAttestationGuard,
+  ],
+  exports: [ContextAttestationVerifier, ContextAttestationGuard],
+})
+export class AttestationModule implements OnModuleInit {
+  constructor(private readonly prisma: PrismaService) {}
+
+  /** Dev seed: register the CRM support client so an attestation signed with the shared dev
+   *  secret verifies locally. Gated by IIOS_DEV_TOKENS + IIOS_ATTESTATION_DEV_SECRET; best-effort. */
+  async onModuleInit(): Promise<void> {
+    if (process.env.IIOS_DEV_TOKENS !== '1') return;
+    const secret = process.env.IIOS_ATTESTATION_DEV_SECRET;
+    if (!secret) return;
+    await this.prisma.iiosClientRegistry
+      .upsert({
+        where: { clientId: 'appshell-crm' },
+        create: { clientId: 'appshell-crm', clientType: 'APPSHELL', allowedAppIds: ['crm-web'], attestSecret: secret, status: 'ACTIVE' },
+        update: { clientType: 'APPSHELL', attestSecret: secret, allowedAppIds: ['crm-web'], status: 'ACTIVE' },
+      })
+      .catch(() => undefined);
+  }
+}
@@ -0,0 +1,96 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { ForbiddenException, type ExecutionContext } from '@nestjs/common';
+import { ContextAttestationGuard } from './context-attestation.guard';
+import {
+  ContextAttestationVerifier,
+  signDevAttestation,
+  type ClientRegistryPort,
+  type NonceStorePort,
+} from './context-attestation';
+import type { SessionVerifier } from './session.verifier';
+
+const SECRET = 'appshell-dev-signing-key';
+
+// SessionVerifier stand-in: the token always resolves to app "crm-web".
+const fakeSession = {
+  verify: () => ({ userId: 'agent_1', appId: 'crm-web', orgId: 'org', tenantId: 'tnt', displayName: 'A' }),
+} as unknown as SessionVerifier;
+
+const registryFor = (): ClientRegistryPort => ({
+  find: async (id) =>
+    id === 'appshell-crm'
+      ? { clientId: 'appshell-crm', clientType: 'APPSHELL', allowedAppIds: ['crm-web'], attestSecret: SECRET, status: 'ACTIVE' }
+      : null,
+});
+const freshNonces = (): NonceStorePort => {
+  const seen = new Set<string>();
+  return { reserve: async ({ nonce }) => (seen.has(nonce) ? false : (seen.add(nonce), true)) };
+};
+
+function makeGuard(): ContextAttestationGuard {
+  const verifier = new ContextAttestationVerifier(registryFor(), freshNonces(), { audience: 'iios-core' });
+  return new ContextAttestationGuard(fakeSession, verifier);
+}
+
+// A guard whose actor token resolves to `tokenApp` — used to test attestation↔token app binding.
+function makeGuardForApp(tokenApp: string): ContextAttestationGuard {
+  const session = {
+    verify: () => ({ userId: 'agent_1', appId: tokenApp, orgId: 'org', tenantId: 'tnt', displayName: 'A' }),
+  } as unknown as SessionVerifier;
+  const verifier = new ContextAttestationVerifier(registryFor(), freshNonces(), { audience: 'iios-core' });
+  return new ContextAttestationGuard(session, verifier);
+}
+
+function ctxWith(headers: Record<string, string>): ExecutionContext {
+  return { switchToHttp: () => ({ getRequest: () => ({ headers }) }) } as unknown as ExecutionContext;
+}
+
+function att(over: Record<string, unknown> = {}, secret = SECRET): string {
+  return signDevAttestation(
+    { issuer: 'appshell.crm', audience: 'iios-core', clientId: 'appshell-crm', appId: 'crm-web', nonce: `n_${Math.random()}`, ...over },
+    secret,
+  );
+}
+
+describe('ContextAttestationGuard (three-proof gate on the request path)', () => {
+  afterEach(() => { delete process.env.IIOS_REQUIRE_ATTESTATION; });
+
+  it('allows a request with no attestation when NOT required (dev / zero-trust)', async () => {
+    expect(await makeGuard().canActivate(ctxWith({}))).toBe(true);
+  });
+
+  it('rejects a request with no attestation when IIOS_REQUIRE_ATTESTATION=1', async () => {
+    process.env.IIOS_REQUIRE_ATTESTATION = '1';
+    await expect(makeGuard().canActivate(ctxWith({}))).rejects.toBeInstanceOf(ForbiddenException);
+  });
+
+  it('allows a valid attestation bound to the token app', async () => {
+    const headers = { authorization: 'Bearer tok', 'x-context-attestation': att() };
+    expect(await makeGuard().canActivate(ctxWith(headers))).toBe(true);
+  });
+
+  it('rejects a forged attestation (wrong signing key) — stolen-context defense', async () => {
+    const headers = { authorization: 'Bearer tok', 'x-context-attestation': att({ nonce: 'n_forge' }, 'attacker-key') };
+    await expect(makeGuard().canActivate(ctxWith(headers))).rejects.toBeInstanceOf(ForbiddenException);
+  });
+
+  it('rejects a replayed attestation (same nonce twice)', async () => {
+    const guard = makeGuard();
+    const headers = { authorization: 'Bearer tok', 'x-context-attestation': att({ nonce: 'n_replay' }) };
+    expect(await guard.canActivate(ctxWith(headers))).toBe(true);
+    await expect(guard.canActivate(ctxWith({ ...headers }))).rejects.toBeInstanceOf(ForbiddenException);
+  });
+
+  // ── doc rejection matrix: "valid token + wrong client/context → reject" ──
+  it('rejects a valid attestation whose app binding != the actor token app (stolen context reused by another app)', async () => {
+    // Attestation is validly signed for app crm-web, but the presented actor token is for a different app.
+    const headers = { authorization: 'Bearer tok', 'x-context-attestation': att({ nonce: 'n_appmix' }) };
+    await expect(makeGuardForApp('other-app').canActivate(ctxWith(headers))).rejects.toThrow(/APP_MISMATCH/);
+  });
+
+  // ── doc rejection matrix: "valid token + wrong audience → reject before business logic" ──
+  it('rejects an attestation minted for another service (audience != iios-core) replayed at IIOS', async () => {
+    const headers = { authorization: 'Bearer tok', 'x-context-attestation': att({ nonce: 'n_aud', audience: 'some-other-service' }) };
+    await expect(makeGuard().canActivate(ctxWith(headers))).rejects.toThrow(/WRONG_AUDIENCE/);
+  });
+});
@@ -0,0 +1,52 @@
+import { type CanActivate, type ExecutionContext, ForbiddenException, Injectable } from '@nestjs/common';
+import type { Request } from 'express';
+import { SessionVerifier } from './session.verifier';
+import { ContextAttestationVerifier } from './context-attestation';
+
+/**
+ * The July 12 three-proof gate on the request path. Proof #1 (a valid actor token) is done by
+ * the controllers; proof #2 (workload/mTLS) is the mesh's job in prod. This guard adds proof #3:
+ * a signed CONTEXT ATTESTATION from an authorized parent (AppShell etc.).
+ *
+ * Behaviour (safe rollout):
+ *   • attestation header present → verify it; the attestation's app_id must match the actor
+ *     token's app_id. Any failure → 403.
+ *   • attestation header absent  → allowed ONLY when not required (dev / a zero-trust standalone
+ *     caller that IIOS checks fully itself). With `IIOS_REQUIRE_ATTESTATION=1`, absence is a 403.
+ *
+ * The requirement is read per-request so it can be toggled without restarts and stays OFF by
+ * default — existing callers that don't send an attestation keep working until the rollout flips.
+ */
+@Injectable()
+export class ContextAttestationGuard implements CanActivate {
+  constructor(
+    private readonly session: SessionVerifier,
+    private readonly attest: ContextAttestationVerifier,
+  ) {}
+
+  async canActivate(ctx: ExecutionContext): Promise<boolean> {
+    const required = process.env.IIOS_REQUIRE_ATTESTATION === '1';
+    const req = ctx.switchToHttp().getRequest<Request>();
+    const raw = req.headers['x-context-attestation'];
+    const attestation = Array.isArray(raw) ? raw[0] : raw;
+
+    if (!attestation) {
+      if (required) throw new ForbiddenException('context attestation required');
+      return true; // dev / zero-trust: the actor token is still enforced downstream
+    }
+
+    // Bind the attestation to the token's app_id, so a stolen attestation for another app fails.
+    const auth = req.headers['authorization'] ?? '';
+    const token = String(auth).replace(/^Bearer\s+/i, '');
+    let appId: string;
+    try {
+      appId = this.session.verify(token).appId ?? '';
+    } catch {
+      throw new ForbiddenException('invalid actor token');
+    }
+
+    const result = await this.attest.verify(attestation, appId);
+    if (!result.ok) throw new ForbiddenException(`context attestation rejected: ${result.reason}`);
+    return true;
+  }
+}
@@ -0,0 +1,193 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { generateKeyPairSync } from 'node:crypto';
+import { PrismaClient } from '@prisma/client';
+import {
+  ContextAttestationVerifier,
+  signDevAttestation,
+  signDevAttestationES256,
+  type ClientRegistryEntry,
+  type ClientRegistryPort,
+  type NonceStorePort,
+  type PublicKeyResolverPort,
+} from './context-attestation';
+import { PrismaNonceStore } from './attestation-stores';
+import type { PrismaService } from '../prisma/prisma.service';
+
+const APPSHELL_SECRET = 'appshell-dev-signing-key';
+const AUD = 'iios-core';
+const NOW = new Date('2026-07-13T12:00:00Z');
+
+// ─── in-memory fakes (fast, deterministic — no DB needed) ─────────
+function fakeRegistry(over: Partial<ClientRegistryEntry> = {}): ClientRegistryPort {
+  const entry: ClientRegistryEntry = {
+    clientId: 'appshell-crm',
+    clientType: 'SUPPORT_BFF',
+    allowedAppIds: ['crm-web'],
+    attestSecret: APPSHELL_SECRET,
+    status: 'ACTIVE',
+    ...over,
+  };
+  return { find: async (id) => (id === entry.clientId ? entry : null) };
+}
+
+function fakeNonces(): NonceStorePort {
+  const seen = new Set<string>();
+  return { reserve: async ({ nonce }) => (seen.has(nonce) ? false : (seen.add(nonce), true)) };
+}
+
+const verifier = (reg: ClientRegistryPort = fakeRegistry(), nonces: NonceStorePort = fakeNonces()) =>
+  new ContextAttestationVerifier(reg, nonces, { audience: AUD });
+
+/** A well-formed AppShell attestation, overridable per test. */
+function attest(over: Record<string, unknown> = {}, secret = APPSHELL_SECRET, at = NOW): string {
+  return signDevAttestation(
+    { issuer: 'appshell.crm', issuerType: 'APPSHELL', audience: AUD, clientId: 'appshell-crm', appId: 'crm-web', nonce: 'n_default', ...over },
+    secret,
+    at,
+  );
+}
+
+describe('ContextAttestationVerifier (July 12 trust proof)', () => {
+  it('accepts a valid attestation from a registered client for the matching app', async () => {
+    const res = await verifier().verify(attest({ nonce: 'n_ok' }), 'crm-web', NOW);
+    expect(res.ok).toBe(true);
+    if (res.ok) expect(res.attestation.clientId).toBe('appshell-crm');
+  });
+
+  // ── the five rejection cases the CEO named ──
+  it('rejects an unknown / unregistered client (wrong client)', async () => {
+    const res = await verifier().verify(attest({ clientId: 'hacker-app', nonce: 'n1' }), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'UNKNOWN_CLIENT' });
+  });
+
+  it('rejects the wrong audience (token minted for another service)', async () => {
+    const res = await verifier().verify(attest({ audience: 'some-other-service', nonce: 'n2' }), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'WRONG_AUDIENCE' });
+  });
+
+  it('rejects an expired attestation', async () => {
+    // signed 10 min ago with a 5 min TTL → already expired at NOW
+    const stale = attest({ nonce: 'n3', ttlSeconds: 300 }, APPSHELL_SECRET, new Date(NOW.getTime() - 600_000));
+    const res = await verifier().verify(stale, 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'EXPIRED' });
+  });
+
+  it('rejects a replayed nonce (same attestation used twice)', async () => {
+    const v = verifier();
+    const token = attest({ nonce: 'n_replay' });
+    const first = await v.verify(token, 'crm-web', NOW);
+    const second = await v.verify(token, 'crm-web', NOW);
+    expect(first.ok).toBe(true);
+    expect(second).toMatchObject({ ok: false, reason: 'REPLAY' });
+  });
+
+  it('rejects app mismatch: token app != attestation app', async () => {
+    const res = await verifier().verify(attest({ appId: 'crm-web', nonce: 'n4' }), 'some-other-app', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'APP_MISMATCH' });
+  });
+
+  // ── extra hardening ──
+  it('rejects a forged signature (signed with the wrong key)', async () => {
+    const res = await verifier().verify(attest({ nonce: 'n5' }, 'attacker-key'), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'BAD_SIGNATURE' });
+  });
+
+  it('rejects a disabled client', async () => {
+    const res = await verifier(fakeRegistry({ status: 'DISABLED' })).verify(attest({ nonce: 'n6' }), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'CLIENT_DISABLED' });
+  });
+
+  it('rejects an app the client is not allowed to attest for', async () => {
+    const reg = fakeRegistry({ allowedAppIds: ['other-app'] });
+    const res = await verifier(reg).verify(attest({ appId: 'crm-web', nonce: 'n7' }), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'APP_MISMATCH' });
+  });
+});
+
+// ─── prod asymmetric path: ES256 verified via the client's JWKS ───
+describe('ContextAttestationVerifier — JWKS / ES256 (production signing path)', () => {
+  const JWKS = 'https://appshell.example/.well-known/jwks.json';
+  const KID = 'appshell-key-1';
+
+  // A real EC P-256 keypair (what AppShell would hold; only the public half is published as JWKS).
+  const { privateKey, publicKey } = generateKeyPairSync('ec', { namedCurve: 'P-256' });
+  const privPem = privateKey.export({ type: 'pkcs8', format: 'pem' }) as string;
+  const pubPem = publicKey.export({ type: 'spki', format: 'pem' }) as string;
+  const { privateKey: otherPriv } = generateKeyPairSync('ec', { namedCurve: 'P-256' });
+  const otherPrivPem = otherPriv.export({ type: 'pkcs8', format: 'pem' }) as string;
+
+  // Registry entry that verifies via JWKS (no shared secret) + a resolver that maps KID → pubkey.
+  const jwksRegistry: ClientRegistryPort = {
+    find: async (id) =>
+      id === 'appshell-crm'
+        ? { clientId: 'appshell-crm', clientType: 'APPSHELL', allowedAppIds: ['crm-web'], jwksUri: JWKS, status: 'ACTIVE' }
+        : null,
+  };
+  const resolver: PublicKeyResolverPort = { resolve: async (_uri, kid) => (kid === KID ? pubPem : null) };
+  const v = () => new ContextAttestationVerifier(jwksRegistry, fakeNonces(), { audience: AUD }, resolver);
+  // No 4th arg → no key resolver wired at all (distinct from passing undefined, which hits the default).
+  const vNoResolver = () => new ContextAttestationVerifier(jwksRegistry, fakeNonces(), { audience: AUD });
+
+  function es256(over: Record<string, unknown> = {}, priv = privPem, kid = KID): string {
+    return signDevAttestationES256(
+      { issuer: 'appshell.crm', issuerType: 'APPSHELL', audience: AUD, clientId: 'appshell-crm', appId: 'crm-web', nonce: `n_${Math.random()}`, ...over },
+      priv,
+      kid,
+      NOW,
+    );
+  }
+
+  it('accepts an ES256 attestation whose signature verifies against the JWKS', async () => {
+    const res = await v().verify(es256({ nonce: 'es_ok' }), 'crm-web', NOW);
+    expect(res.ok).toBe(true);
+    if (res.ok) expect(res.attestation.clientId).toBe('appshell-crm');
+  });
+
+  it('rejects an ES256 attestation signed with a DIFFERENT private key (forged)', async () => {
+    const res = await v().verify(es256({ nonce: 'es_forged' }, otherPrivPem), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'BAD_SIGNATURE' });
+  });
+
+  it('rejects when the JWT header carries an unknown kid (no matching JWKS key)', async () => {
+    const res = await v().verify(es256({ nonce: 'es_kid' }, privPem, 'rotated-away-kid'), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'NO_KEY' });
+  });
+
+  it('rejects when a JWKS client is configured but no key resolver is wired', async () => {
+    const res = await vNoResolver().verify(es256({ nonce: 'es_nores' }), 'crm-web', NOW);
+    expect(res).toMatchObject({ ok: false, reason: 'NO_KEY' });
+  });
+
+  it('still enforces audience / app / replay on the ES256 path', async () => {
+    const vv = v();
+    expect(await vv.verify(es256({ nonce: 'es_aud', audience: 'other' }), 'crm-web', NOW)).toMatchObject({ ok: false, reason: 'WRONG_AUDIENCE' });
+    expect(await vv.verify(es256({ nonce: 'es_app' }), 'some-other-app', NOW)).toMatchObject({ ok: false, reason: 'APP_MISMATCH' });
+    const tok = es256({ nonce: 'es_replay' });
+    expect((await vv.verify(tok, 'crm-web', NOW)).ok).toBe(true);
+    expect(await vv.verify(tok, 'crm-web', NOW)).toMatchObject({ ok: false, reason: 'REPLAY' });
+  });
+});
+
+// ─── DB-level atomicity of the nonce ledger ───────────────────────
+describe('PrismaNonceStore (atomic replay defense)', () => {
+  const url = process.env.DATABASE_URL ?? 'postgresql://iios:iios@localhost:5434/iios?schema=public';
+  const prisma = new PrismaClient({ datasources: { db: { url } } });
+  const store = new PrismaNonceStore(prisma as unknown as PrismaService);
+  let dbUp = false;
+
+  beforeAll(async () => {
+    try { await prisma.$connect(); dbUp = true; } catch { dbUp = false; }
+  });
+  afterAll(async () => { if (dbUp) await prisma.$disconnect(); });
+
+  it('reserves a nonce once; a second reserve of the same nonce is rejected', async (ctx) => {
+    if (!dbUp) return ctx.skip(); // DB unreachable in this environment — the in-memory REPLAY test covers the logic
+    const nonce = `n_db_${NOW.getTime()}_${Math.floor(Math.random() * 1e9)}`;
+    const expiresAt = new Date(NOW.getTime() + 300_000);
+    const first = await store.reserve({ nonce, clientId: 'appshell-crm', expiresAt });
+    const second = await store.reserve({ nonce, clientId: 'appshell-crm', expiresAt });
+    expect(first).toBe(true);
+    expect(second).toBe(false);
+    await prisma.iiosAttestationNonce.delete({ where: { nonce } }).catch(() => undefined);
+  });
+});
@@ -0,0 +1,190 @@
+import jwt from 'jsonwebtoken';
+
+/**
+ * The July 12 "third proof". A cryptographically valid actor token is NOT enough — a hacked
+ * app can replay a stolen one. Before IIOS processes a privileged request it must also verify
+ * a CONTEXT ATTESTATION: a short-lived, single-use, signed statement from an authorized parent
+ * (AppShell for CRM, the adapter registry for channels, Calendar for calendar) that says
+ * "this request, this client, this app, this context is genuinely mine."
+ *
+ * This module is the verifier + its two ports (client registry, nonce ledger) + a dev signer.
+ * It is intentionally decoupled from the request path so it can be unit-tested in isolation and
+ * wired into the messaging guard as a separate, gated step.
+ */
+
+/** The subset of AppShell's context-attestation envelope that IIOS verifies. */
+export interface ContextAttestation {
+  attestationId?: string;
+  issuer: string;
+  issuerType?: string; // APPSHELL | SUPPORT_BFF | ADAPTER | CALENDAR | SERVICE
+  audience: string; // must equal the configured IIOS audience
+  clientId: string; // must be a registered, ACTIVE client
+  appId: string; // must match the actor token's app_id AND be allowed for this client
+  scope?: { orgId?: string; appId?: string; tenantId?: string; buId?: string };
+  nonce: string; // single-use
+  iat?: number;
+  exp?: number; // short-lived
+}
+
+/** A registered caller allowed to attest context on behalf of one or more apps. */
+export interface ClientRegistryEntry {
+  clientId: string;
+  clientType: string;
+  allowedAppIds: string[];
+  attestSecret?: string; // dev: shared HS256 signing key (AppShell's key stand-in)
+  jwksUri?: string; // prod: verify the attestation signature asymmetrically (ES256) via this JWKS
+  status: 'ACTIVE' | 'DISABLED';
+}
+
+export interface ClientRegistryPort {
+  find(clientId: string): Promise<ClientRegistryEntry | null>;
+}
+
+export interface NonceStorePort {
+  /** Atomically reserve a nonce. Returns true if fresh, false if it was already seen (replay). */
+  reserve(input: { nonce: string; clientId: string; expiresAt: Date }): Promise<boolean>;
+}
+
+/**
+ * Resolves the PUBLIC key for a JWKS uri + key id, for the prod asymmetric (ES256) path.
+ * A port so the verifier stays network-free and unit-testable — the real impl fetches +
+ * caches the client's JWKS; tests inject a fake that returns a known key.
+ */
+export interface PublicKeyResolverPort {
+  /** Return the signing key (PEM) for `kid` at `jwksUri`, or null if it can't be resolved. */
+  resolve(jwksUri: string, kid: string): Promise<string | null>;
+}
+
+export type AttestationReason =
+  | 'MALFORMED'
+  | 'UNKNOWN_CLIENT'
+  | 'CLIENT_DISABLED'
+  | 'NO_KEY'
+  | 'BAD_SIGNATURE'
+  | 'WRONG_AUDIENCE'
+  | 'APP_MISMATCH'
+  | 'EXPIRED'
+  | 'REPLAY';
+
+export type AttestationResult =
+  | { ok: true; attestation: ContextAttestation }
+  | { ok: false; reason: AttestationReason; detail: string };
+
+export interface AttestationConfig {
+  /** The audience IIOS requires on attestations addressed to it (e.g. 'iios-core'). */
+  audience: string;
+}
+
+const deny = (reason: AttestationReason, detail: string): AttestationResult => ({ ok: false, reason, detail });
+
+export class ContextAttestationVerifier {
+  constructor(
+    private readonly registry: ClientRegistryPort,
+    private readonly nonces: NonceStorePort,
+    private readonly config: AttestationConfig,
+    /** Optional — required only for clients that verify via a JWKS (prod ES256). */
+    private readonly keys?: PublicKeyResolverPort,
+  ) {}
+
+  /**
+   * Verify an attestation against an already-verified actor token. Fail-closed: any doubt → deny.
+   * @param attestationJwt the signed attestation the parent issued
+   * @param tokenAppId     the `app_id` from the verified actor token (Level-1 proof)
+   * @param now            current time — injected so tests are deterministic
+   */
+  async verify(attestationJwt: string, tokenAppId: string, now: Date = new Date()): Promise<AttestationResult> {
+    // 1. Decode WITHOUT verifying, only to learn who claims to have signed it.
+    const claimed = jwt.decode(attestationJwt, { json: true }) as (ContextAttestation & jwt.JwtPayload) | null;
+    if (!claimed || typeof claimed !== 'object' || !claimed.clientId || !claimed.nonce) {
+      return deny('MALFORMED', 'attestation missing clientId/nonce');
+    }
+
+    // 2. The claimed client must be registered and ACTIVE.
+    const client = await this.registry.find(claimed.clientId);
+    if (!client) return deny('UNKNOWN_CLIENT', `client "${claimed.clientId}" is not registered`);
+    if (client.status !== 'ACTIVE') return deny('CLIENT_DISABLED', `client "${claimed.clientId}" is ${client.status}`);
+
+    // 3. Verify the signature with the client's key. A client verifies EITHER asymmetrically via
+    //    its published JWKS (prod: AppShell signs ES256 with a private key) OR with a shared HS256
+    //    secret (dev stand-in). ignoreExpiration so we can return a precise EXPIRED (step 6) rather
+    //    than BAD_SIGNATURE.
+    const key = await this.resolveVerificationKey(attestationJwt, client);
+    if (!key.ok) return deny(key.reason, key.detail);
+    let att: ContextAttestation & jwt.JwtPayload;
+    try {
+      att = jwt.verify(attestationJwt, key.pem, { algorithms: [key.alg], ignoreExpiration: true }) as ContextAttestation & jwt.JwtPayload;
+    } catch (e) {
+      return deny('BAD_SIGNATURE', (e as Error).message);
+    }
+
+    // 4. Audience must be IIOS — a token for another service can't be replayed at IIOS.
+    if (att.audience !== this.config.audience) return deny('WRONG_AUDIENCE', `audience "${att.audience}" != "${this.config.audience}"`);
+
+    // 5. app binding: the attestation's app must match the token's app AND be allowed for this client.
+    if (att.appId !== tokenAppId) return deny('APP_MISMATCH', `attestation app "${att.appId}" != token app "${tokenAppId}"`);
+    if (!client.allowedAppIds.includes(att.appId)) return deny('APP_MISMATCH', `client "${client.clientId}" not allowed for app "${att.appId}"`);
+
+    // 6. Freshness — attestations are short-lived.
+    const expMs = (att.exp ?? 0) * 1000;
+    if (!expMs || expMs <= now.getTime()) return deny('EXPIRED', 'attestation expired or missing exp');
+
+    // 7. Single-use — reserve the nonce. A replayed (stolen) attestation loses here. Fail-closed.
+    const fresh = await this.nonces.reserve({ nonce: att.nonce, clientId: client.clientId, expiresAt: new Date(expMs) });
+    if (!fresh) return deny('REPLAY', `nonce "${att.nonce}" already used`);
+
+    return { ok: true, attestation: att };
+  }
+
+  /**
+   * Pick the algorithm + verification key for a client. JWKS (ES256) wins when configured:
+   * read the `kid` from the JWT header and resolve the public key from the client's JWKS.
+   * Otherwise fall back to the shared HS256 dev secret. Either way returns a precise NO_KEY
+   * reason when no usable key can be obtained (fail-closed).
+   */
+  private async resolveVerificationKey(
+    attestationJwt: string,
+    client: ClientRegistryEntry,
+  ): Promise<{ ok: true; pem: string; alg: 'ES256' | 'HS256' } | { ok: false; reason: AttestationReason; detail: string }> {
+    if (client.jwksUri) {
+      if (!this.keys) return { ok: false, reason: 'NO_KEY', detail: `client "${client.clientId}" uses JWKS but no key resolver is wired` };
+      const decoded = jwt.decode(attestationJwt, { complete: true });
+      const kid = decoded && typeof decoded === 'object' ? (decoded.header?.kid as string | undefined) : undefined;
+      if (!kid) return { ok: false, reason: 'NO_KEY', detail: 'attestation header missing kid (required for JWKS)' };
+      const pem = await this.keys.resolve(client.jwksUri, kid).catch(() => null);
+      if (!pem) return { ok: false, reason: 'NO_KEY', detail: `no JWKS key for kid "${kid}"` };
+      return { ok: true, pem, alg: 'ES256' };
+    }
+    if (client.attestSecret) return { ok: true, pem: client.attestSecret, alg: 'HS256' };
+    return { ok: false, reason: 'NO_KEY', detail: `no verification key configured for "${client.clientId}"` };
+  }
+}
+
+/**
+ * DEV/TEST helper: mint a signed attestation the way AppShell would (HS256 stand-in for its
+ * signing key). Production AppShell signs asymmetrically and IIOS verifies via the client's JWKS.
+ */
+export function signDevAttestation(
+  claims: Omit<ContextAttestation, 'iat' | 'exp'> & { ttlSeconds?: number },
+  secret: string,
+  now: Date = new Date(),
+): string {
+  const { ttlSeconds = 300, ...rest } = claims;
+  const iat = Math.floor(now.getTime() / 1000);
+  return jwt.sign({ ...rest, iat, exp: iat + ttlSeconds }, secret, { algorithm: 'HS256' });
+}
+
+/**
+ * DEV/TEST helper: mint an attestation signed ASYMMETRICALLY (ES256), the way production AppShell
+ * does. `privateKeyPem` is a PKCS#8 EC private key; `kid` is stamped into the JWT header so the
+ * verifier can pick the matching public key from the client's JWKS.
+ */
+export function signDevAttestationES256(
+  claims: Omit<ContextAttestation, 'iat' | 'exp'> & { ttlSeconds?: number },
+  privateKeyPem: string,
+  kid: string,
+  now: Date = new Date(),
+): string {
+  const { ttlSeconds = 300, ...rest } = claims;
+  const iat = Math.floor(now.getTime() / 1000);
+  return jwt.sign({ ...rest, iat, exp: iat + ttlSeconds }, privateKeyPem, { algorithm: 'ES256', keyid: kid });
+}
@@ -135,6 +135,7 @@ export class SessionVerifier implements OnModuleInit {
      orgId: entry.orgId,
      tenantId: undefined,
      displayName: meta.full_name ?? meta.name ?? email ?? userId,
+      audience: typeof payload.aud === 'string' ? payload.aud : entry.audience,
    };
  }

@@ -159,6 +160,7 @@ export class SessionVerifier implements OnModuleInit {
      orgId: payload.orgId ? String(payload.orgId) : `org_${appId}`,
      tenantId: payload.tenantId ? String(payload.tenantId) : undefined,
      displayName: payload.name ? String(payload.name) : undefined,
+      audience: typeof payload.aud === 'string' ? payload.aud : undefined,
    };
  }

@@ -1,10 +1,12 @@
-import { BadRequestException, Body, Controller, Get, Headers, Param, Patch, Post, Query } from '@nestjs/common';
+import { BadRequestException, Body, Controller, Get, Headers, Param, Patch, Post, Query, UseGuards } from '@nestjs/common';
 import { IiosTicketState } from '@prisma/client';
 import { SupportService } from './support.service';
 import { AssignmentService } from './assignment.service';
 import { SessionVerifier } from '../platform/session.verifier';
+import { ContextAttestationGuard } from '../platform/context-attestation.guard';
 import type { MessagePrincipal } from '../identity/actor.resolver';
 import {
+  AssignTicketDto,
  AvailabilityDto,
  CallbackDto,
  CreateQueueDto,
@@ -14,6 +16,7 @@ import {
 } from './support.dto';

@Controller('v1/support')
+@UseGuards(ContextAttestationGuard)
 export class SupportController {
  constructor(
    private readonly support: SupportService,
@@ -32,7 +35,7 @@ export class SupportController {

  @Post('escalate')
  async escalate(@Body() body: EscalateDto, @Headers('authorization') auth?: string) {
-    return this.support.escalate(body.threadId, this.principal(auth), body.subject);
+    return this.support.escalate(body.threadId, this.principal(auth), body.subject, body.metadata);
  }

  @Get('tickets')
@@ -45,6 +48,12 @@ export class SupportController {
    return this.support.transition(id, this.principal(auth), body.state as IiosTicketState, body.reason);
  }

+  /** Manually assign a ticket to a specific actor (by userId) — generic assignment override. */
+  @Post('tickets/:id/assignee')
+  async assign(@Param('id') id: string, @Body() body: AssignTicketDto, @Headers('authorization') auth?: string) {
+    return this.support.assignTo(id, this.principal(auth), body.userId);
+  }
+
  @Post('callbacks')
  async callback(
    @Body() body: CallbackDto,
@@ -1,4 +1,4 @@
-import { IsIn, IsOptional, IsString } from 'class-validator';
+import { IsIn, IsObject, IsOptional, IsString } from 'class-validator';

 const PRIORITIES = ['P0', 'P1', 'P2', 'P3', 'P4'] as const;
 const STATES = ['NEW', 'OPEN', 'PENDING_CUSTOMER', 'PENDING_INTERNAL', 'RESOLVED', 'CLOSED', 'CANCELLED'] as const;
@@ -7,11 +7,18 @@ export class CreateTicketDto {
  @IsString() subject!: string;
  @IsOptional() @IsIn(PRIORITIES) priority?: (typeof PRIORITIES)[number];
  @IsOptional() @IsString() threadId?: string;
+  /** Opaque, app-supplied attribute bag — stored on the ticket, never interpreted by the kernel. */
+  @IsOptional() @IsObject() metadata?: Record<string, unknown>;
 }

 export class EscalateDto {
  @IsString() threadId!: string;
  @IsOptional() @IsString() subject?: string;
+  @IsOptional() @IsObject() metadata?: Record<string, unknown>;
+}
+
+export class AssignTicketDto {
+  @IsString() userId!: string;
 }

 export class PatchTicketDto {
@@ -35,7 +35,7 @@ export class SupportService {

  async createTicket(
    principal: MessagePrincipal,
-    input: { subject: string; priority?: IiosTicketPriority; threadId?: string; queueId?: string },
+    input: { subject: string; priority?: IiosTicketPriority; threadId?: string; queueId?: string; metadata?: Record<string, unknown> },
    idempotencyKey?: string,
  ) {
    await decideOrThrow(this.ports, { action: 'iios.support.ticket.create', scope: principal });
@@ -63,6 +63,8 @@ export class SupportService {
            subject: input.subject,
            priority: input.priority ?? 'P3',
            traceId,
+            // Opaque, app-supplied attribute bag (e.g. a caller's external ref) — stored, never interpreted.
+            metadata: input.metadata ? (input.metadata as Prisma.InputJsonValue) : undefined,
          },
        });
        await tx.iiosTicketStateHistory.create({
@@ -99,11 +101,17 @@ export class SupportService {
    return this.idempotency.run({ scopeId: scope.id, commandName: 'support.ticket.create', key: idempotencyKey, request: input }, body);
  }

-  /** Escalate a chat thread to support: create a ticket linked to that thread. */
-  async escalate(threadId: string, principal: MessagePrincipal, subject?: string) {
+  /** Escalate a chat thread to support: create a ticket linked to that thread. `metadata` is opaque. */
+  async escalate(threadId: string, principal: MessagePrincipal, subject?: string, metadata?: Record<string, unknown>) {
    const thread = await this.prisma.iiosThread.findUnique({ where: { id: threadId } });
    if (!thread) throw new NotFoundException('thread not found');
-    return this.createTicket(principal, { subject: subject ?? thread.subject ?? 'Support request', threadId });
+    // Inherit the thread's opaque bag so the ticket carries the same app context, unless overridden.
+    const inherited = { ...((thread.metadata as Record<string, unknown> | null) ?? {}), ...(metadata ?? {}) };
+    return this.createTicket(principal, {
+      subject: subject ?? thread.subject ?? 'Support request',
+      threadId,
+      metadata: Object.keys(inherited).length > 0 ? inherited : undefined,
+    });
  }

  async linkThread(ticketId: string, threadId: string, relationKind = 'PRIMARY'): Promise<void> {
@@ -120,6 +128,53 @@ export class SupportService {
      .catch(() => undefined);
  }

+  /**
+   * Manually assign a ticket to a specific actor (by userId) — a generic override of the
+   * event-driven auto-assignment. The target is resolved-or-created as an actor in the ticket's
+   * scope (so you can assign someone who hasn't logged in yet) and joined to the linked thread(s)
+   * so they can reply over the socket. Fail-closed via policy `iios.support.ticket.assign`.
+   */
+  async assignTo(ticketId: string, principal: MessagePrincipal, targetUserId: string) {
+    const ticket = await this.prisma.iiosTicket.findUnique({ where: { id: ticketId }, include: { threadLinks: true } });
+    if (!ticket) throw new NotFoundException('ticket not found');
+    await decideOrThrow(this.ports, { action: 'iios.support.ticket.assign', ticketId, scopeId: ticket.scopeId, targetUserId });
+
+    const target = await this.actors.resolveActor(ticket.scopeId, {
+      userId: targetUserId,
+      appId: principal.appId,
+      orgId: principal.orgId,
+      tenantId: principal.tenantId,
+      displayName: targetUserId,
+    });
+    const toState: IiosTicketState = ticket.state === 'NEW' ? 'OPEN' : ticket.state;
+    const event: CloudEvent = {
+      specversion: '1.0',
+      id: `evt_assign_${ticketId}_${target.id}`,
+      type: IIOS_EVENTS.ticketStateChanged,
+      source: `iios/support/${ticket.scopeId}`,
+      subject: `ticket/${ticketId}`,
+      time: new Date().toISOString(),
+      datacontenttype: 'application/json',
+      insignia: { scopeSnapshotId: ticket.scopeId, correlationId: ticket.traceId ?? undefined, idempotencyKey: `assign:${ticketId}:${target.id}`, dataClass: 'internal' },
+      data: { ticketId, fromState: ticket.state, toState, assignedActorId: target.id },
+    };
+    await this.prisma.$transaction([
+      this.prisma.iiosTicket.update({ where: { id: ticketId }, data: { assignedActorId: target.id, state: toState } }),
+      this.prisma.iiosTicketStateHistory.create({ data: { ticketId, fromState: ticket.state, toState, actorId: target.id, reasonCode: 'assigned' } }),
+      this.prisma.iiosOutboxEvent.create({
+        data: {
+          aggregateType: 'ticket',
+          aggregateId: ticketId,
+          eventType: IIOS_EVENTS.ticketStateChanged,
+          cloudEvent: event as unknown as Prisma.InputJsonValue,
+          partitionKey: `${ticket.scopeId}:${ticketId}`,
+        },
+      }),
+    ]);
+    for (const link of ticket.threadLinks) await this.actors.ensureParticipant(link.threadId, target.id);
+    return this.prisma.iiosTicket.findUnique({ where: { id: ticketId } });
+  }
+
  async transition(ticketId: string, principal: MessagePrincipal, toState: IiosTicketState, reason?: string) {
    const ticket = await this.prisma.iiosTicket.findUnique({ where: { id: ticketId } });
    if (!ticket) throw new NotFoundException('ticket not found');
@@ -57,6 +57,19 @@ describe('SupportService (P4)', () => {
    expect(links[0]?.threadId).toBe(threadId);
  });

+  it('stores an opaque metadata bag on the ticket; assignTo assigns to a target actor and opens it', async () => {
+    const t = await support().createTicket(cust, { subject: 'help', metadata: { crmCustomerId: 'cust_1', source: 'crm-support' } });
+    expect(t.metadata).toMatchObject({ crmCustomerId: 'cust_1', source: 'crm-support' });
+    expect(t.state).toBe('NEW');
+
+    const assigned = await support().assignTo(t.id, cust, 'agent_1');
+    expect(assigned?.state).toBe('OPEN');
+    const handle = await prisma.iiosSourceHandle.findFirstOrThrow({ where: { externalId: 'agent_1' } });
+    const actor = await prisma.iiosActorRef.findFirstOrThrow({ where: { sourceHandleId: handle.id } });
+    expect(assigned?.assignedActorId).toBe(actor.id);
+    expect(await prisma.iiosTicketStateHistory.count({ where: { ticketId: t.id, reasonCode: 'assigned' } })).toBe(1);
+  });
+
  it('transitions NEW→OPEN→RESOLVED→CLOSED with history + rejects illegal moves', async () => {
    const t = await support().createTicket(cust, { subject: 's' });
    await support().transition(t.id, cust, 'OPEN');
@@ -9,13 +9,16 @@ import {
  Param,
  Post,
  Query,
+  UseGuards,
 } from '@nestjs/common';
 import { ThreadsService } from './threads.service';
 import { MessageService } from '../messaging/message.service';
 import { SessionVerifier } from '../platform/session.verifier';
+import { ContextAttestationGuard } from '../platform/context-attestation.guard';
 import { SendMessageDto } from './send-message.dto';

@Controller('v1/threads')
+@UseGuards(ContextAttestationGuard)
 export class ThreadsController {
  constructor(
    private readonly threads: ThreadsService,
@@ -23,10 +26,14 @@ export class ThreadsController {
    private readonly session: SessionVerifier,
  ) {}

-  /** Generic "my threads" — every thread the caller participates in (last message + unread). */
+  /**
+   * Generic "my threads" — every thread the caller participates in (last message + unread).
+   * `?metadata[key]=value` narrows to threads whose opaque attribute bag matches (equality on each key).
+   */
  @Get()
-  async listThreads(@Headers('authorization') auth?: string) {
-    return this.messages.listThreads(this.principal(auth));
+  async listThreads(@Headers('authorization') auth?: string, @Query('metadata') metadata?: Record<string, string>) {
+    const metaFilter = metadata && typeof metadata === 'object' ? metadata : undefined;
+    return this.messages.listThreads(this.principal(auth), metaFilter ? { metadata: metaFilter } : undefined);
  }

  /** Generic "my annotated messages" (e.g. ?type=save for a personal bookmarks list). */
@@ -35,11 +42,11 @@ export class ThreadsController {
    return this.messages.listMyAnnotated(this.principal(auth), type);
  }

-  /** Create a thread; `membership`/`creatorRole`/`subject` are opaque, app-supplied attributes the kernel stores but never interprets. */
+  /** Create a thread; `membership`/`creatorRole`/`subject`/`metadata` are opaque, app-supplied attributes the kernel stores but never interprets. */
  @Post()
  @HttpCode(201)
-  async createThread(@Body() body: { membership?: string; creatorRole?: string; subject?: string }, @Headers('authorization') auth?: string) {
-    return this.messages.openThread(null, this.principal(auth), { membership: body?.membership, creatorRole: body?.creatorRole, subject: body?.subject });
+  async createThread(@Body() body: { membership?: string; creatorRole?: string; subject?: string; metadata?: Record<string, unknown> }, @Headers('authorization') auth?: string) {
+    return this.messages.openThread(null, this.principal(auth), { membership: body?.membership, creatorRole: body?.creatorRole, subject: body?.subject, metadata: body?.metadata });
  }

  /** Governed membership: add a user (by userId) to a thread — policy enforces DM cap / roles. */
@@ -370,6 +370,9 @@ importers:
      jsonwebtoken:
        specifier: ^9.0.3
        version: 9.0.3
+      jwks-rsa:
+        specifier: ^4.1.0
+        version: 4.1.0
      prisma:
        specifier: ^6.2.1
        version: 6.19.3(typescript@5.9.3)
@@ -2297,6 +2300,9 @@ packages:
    resolution: {integrity: sha512-AC/7JofJvZGrrneWNaEnJeOLUx+JlGt7tNa0wZiRPT4MY1wmfKjt2+6O2p2uz2+skll8OZZmJMNqeke7kKbNgQ==}
    hasBin: true

+  jose@6.2.3:
+    resolution: {integrity: sha512-YYVDInQKFJfR/xa3ojUTl8c2KoTwiL1R5Wg9YCydwH0x0B9grbzlg5HC7mMjCtUJjbQ/YnGEZIhI5tCgfTb4Hw==}
+
  joycon@3.1.1:
    resolution: {integrity: sha512-34wB/Y7MW7bzjKRjUKTa46I2Z7eV62Rkhva+KkopW7Qvv/OSWBqvkSY7vusOPrNuZcUG3tApvdVgNB8POj3SPw==}
    engines: {node: '>=10'}
@@ -2343,6 +2349,10 @@ packages:
  jwa@2.0.1:
    resolution: {integrity: sha512-hRF04fqJIP8Abbkq5NKGN0Bbr3JxlQ+qhZufXVr0DvujKy93ZCbXZMHDL4EOtodSbCWxOqR8MS1tXA5hwqCXDg==}

+  jwks-rsa@4.1.0:
+    resolution: {integrity: sha512-sbkByqyATKYJP5F4RXj03N5TUNC0QLTjCAZvwTzC4BwJZ8e0/cWxN8YROnyUth2g1/ONWi4eSFHeu6oYalrc3Q==}
+    engines: {node: ^20.19.0 || ^22.12.0 || >= 23.0.0}
+
  jws@4.0.1:
    resolution: {integrity: sha512-EKI/M/yqPncGUUh44xz0PxSidXFr/+r0pA70+gIYhjv+et7yxM+s29Y+VGDkovRofQem0fs7Uvf4+YmAdyRduA==}

@@ -2353,6 +2363,9 @@ packages:
    resolution: {integrity: sha512-/vlFKAoH5Cgt3Ie+JLhRbwOsCQePABiU3tJ1egGvyQ+33R/vcwM2Zl2QR/LzjsBeItPt3oSVXapn+m4nQDvpzw==}
    engines: {node: '>=14'}

+  limiter@1.1.5:
+    resolution: {integrity: sha512-FWWMIEOxz3GwUI4Ts/IvgVy6LPvoMPgjMdQ185nN6psJyBJ4yOpzqm695/h5umdLJg2vW3GR5iG11MAkR2AzJA==}
+
  lines-and-columns@1.2.4:
    resolution: {integrity: sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg==}

@@ -2368,6 +2381,9 @@ packages:
    resolution: {integrity: sha512-DFEqQ3ihfS9blba08cLfYf1NRAIEm+dDjic073DRDc3/JspI/8wYmtDsHwd3+4hwvdxSK7PGaElfTmm0awWJ4w==}
    engines: {node: '>=6.11.5'}

+  lodash.clonedeep@4.5.0:
+    resolution: {integrity: sha512-H5ZhCF25riFd9uB5UCkVKo61m3S/xZk1x4wA6yp/L3RFP6Z/eHH1ymQcGLo7J3GMPfm0V/7m1tryHuGVxpqEBQ==}
+
  lodash.includes@4.3.0:
    resolution: {integrity: sha512-W3Bx6mdkRTGtlJISOvVD/lbqjTlPPUDTMnlXZFnVwi9NKJ6tiAk6LVdlhZMm17VZisqhKcgzpO5Wz91PCt5b0w==}

@@ -2406,6 +2422,9 @@ packages:
  lru-cache@5.1.1:
    resolution: {integrity: sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==}

+  lru-memoizer@3.0.0:
+    resolution: {integrity: sha512-m83w/cYXLdUIboKSPxzPAGfYnk+vqeDYXuoSrQRw1q+yVEd8IXhvMufN8Q5TIPe7e2jyX4SRNrDJI2Skw1yznQ==}
+
  magic-string@0.30.17:
    resolution: {integrity: sha512-sNPKHvyjVf7gyjwS4xGTaW/mCnF8wnjtifKBEhxfZ7E/S8tQ0rssrwGNn6q8JH/ohItJfSQp9mBtQYuTlH5QnA==}

@@ -5066,6 +5085,8 @@ snapshots:

  jiti@2.7.0: {}

+  jose@6.2.3: {}
+
  joycon@3.1.1: {}

  js-tokens@4.0.0: {}
@@ -5113,6 +5134,17 @@ snapshots:
      ecdsa-sig-formatter: 1.0.11
      safe-buffer: 5.2.1

+  jwks-rsa@4.1.0:
+    dependencies:
+      '@types/jsonwebtoken': 9.0.10
+      debug: 4.4.3
+      jose: 6.2.3
+      limiter: 1.1.5
+      lru-cache: 11.5.1
+      lru-memoizer: 3.0.0
+    transitivePeerDependencies:
+      - supports-color
+
  jws@4.0.1:
    dependencies:
      jwa: 2.0.1
@@ -5122,6 +5154,8 @@ snapshots:

  lilconfig@3.1.3: {}

+  limiter@1.1.5: {}
+
  lines-and-columns@1.2.4: {}

  load-esm@1.0.3: {}
@@ -5130,6 +5164,8 @@ snapshots:

  loader-runner@4.3.2: {}

+  lodash.clonedeep@4.5.0: {}
+
  lodash.includes@4.3.0: {}

  lodash.isboolean@3.0.3: {}
@@ -5159,6 +5195,11 @@ snapshots:
    dependencies:
      yallist: 3.1.1

+  lru-memoizer@3.0.0:
+    dependencies:
+      lodash.clonedeep: 4.5.0
+      lru-cache: 11.5.1
+
  magic-string@0.30.17:
    dependencies:
      '@jridgewell/sourcemap-codec': 1.5.5
Author	SHA1	Message	Date
maaz519	3298401772	feat: enforce realtime delegation audience on the message socket The socket used to accept any valid token, so a full REST/actor token could open the live stream. Now it can require a narrowly-scoped delegated token (aud=iios-message), so a leaked socket token can't drive privileged REST, and vice-versa. - MessagePrincipal gains `audience`, surfaced from both verify paths (OIDC aud, and the app-token `aud` claim). - message.gateway: when IIOS_REALTIME_AUDIENCE is set, handleConnection accepts only a token whose aud matches (opt-in, like IIOS_REQUIRE_ATTESTATION; unset = no change). - spec: verifier surfaces aud; gateway accepts iios-message, rejects iios-core / no-aud when enforcing, passes through when off. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-15 12:56:19 +05:30
maaz519	e39caa3c80	feat: verify context attestations via ES256/JWKS + rename client to appshell-crm Proof #3 now supports the production asymmetric path, not just the dev shared secret. - context-attestation.ts: PublicKeyResolverPort seam; verify() picks ES256 (JWKS by kid) when the client has a jwksUri, else HS256 (dev). signDevAttestationES256 helper. - attestation-stores.ts: JwksPublicKeyResolver (jwks-rsa, one cached client per URI, refetch on rotation, fail-closed to NO_KEY). - attestation.module.ts: inject the resolver into the verifier; dev-seed the client as clientType APPSHELL (it is the CRM browser-flow parent per the July-12 notes). - rename the registered client crm-support-widget -> appshell-crm (the name reflects the attesting parent, not a widget). - specs: ES256 (valid via JWKS, wrong key -> BAD_SIGNATURE, unknown kid -> NO_KEY, no resolver -> NO_KEY) + two stolen-token gate cases (wrong app binding -> APP_MISMATCH, wrong audience -> WRONG_AUDIENCE). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-15 12:56:10 +05:30
maaz519	85a78eb21e	feat(iios-kernel-client): per-request header factory → 0.1.4 RestConfig.headers now accepts a function, invoked once per request, so a caller can mint a FRESH context attestation (new single-use nonce) each call. A static header was replay-rejected on the 2nd request of a multi-call operation. Published 0.1.4. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-13 23:26:33 +05:30
maaz519	3e66c7a5db	perf(iios): listThreads fetches last-message-per-thread in one query Replaced the per-thread findFirst inside Promise.all (N parallel queries) with a single Postgres DISTINCT ON query. A caller with many threads no longer fans out and exhausts the connection pool (the conversation.list 500 under accumulated data). message.spec 16/16 green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-13 21:28:37 +05:30
maaz519	9e0411bfe6	feat(iios-kernel-client): RestClient custom headers passthrough → 0.1.3 Adds optional RestConfig.headers, merged into every request, so a server-side caller (be-crm's glue) can carry X-Context-Attestation (the July 12 proof #3) alongside the bearer token. Backward compatible. Published 0.1.3. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-13 21:03:45 +05:30
maaz519	f2d590b04d	feat(iios): wire the three-proof gate into the request path (§1b) Applies the context-attestation verifier at the request boundary via a guard, so a stolen/forged/replayed attestation is rejected before IIOS acts — while staying safe to roll out. - ContextAttestationGuard: if an X-Context-Attestation header is present, verify it (its app_id must match the actor token's app_id) → 403 on any failure; if absent, allow only when IIOS_REQUIRE_ATTESTATION != 1 (dev/zero-trust), else 403. The flag is read per-request and defaults OFF, so existing callers keep working until AppShell/ be-crm start forwarding attestations. - AttestationModule (@Global): provides the verifier + Prisma stores + guard, and dev-seeds the crm-support-widget client so locally minted attestations verify. - Guard applied to ThreadsController + SupportController. - Tests (5 pass, no DB): not-required-allows, required-rejects, valid, forged, replayed. Workload/mTLS (proof #2) stays a mesh concern. Next: SDK header passthrough + demote be-crm IiosClient to forward an attestation, then flip the flag to prove end-to-end. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-13 20:49:40 +05:30
maaz519	dd6a4cd4fa	feat(iios): context-attestation verifier — the July 12 stolen-token proof (§1) A valid actor token is no longer enough. This adds the trust-layer core so IIOS can require a signed CONTEXT ATTESTATION from an authorized parent (AppShell etc.) before a privileged request — defeating a hacked app replaying a stolen token. - prisma: IiosClientRegistry (registered clients allowed to attest, per app) + IiosAttestationNonce (single-use replay ledger). Migration applied. - ContextAttestationVerifier + ports (ClientRegistryPort, NonceStorePort) + a dev signer. Verifies: registered+active client, signature, aud=iios, app_id matches the token AND is allowed for the client, freshness, single-use nonce. Fail-closed. - Prisma-backed stores; nonce reserve is atomic via the unique PK (P2002 = replay). - Tests (9 pass): happy path + the five rejection cases the CEO named (unknown client, wrong audience, expired, replayed nonce, app-mismatch) + forged-signature + disabled-client; a DB atomicity test (skips if engine offline). Decoupled from the request path on purpose — wiring it into the messaging guard (the three-proof gate) + demoting be-crm to an attestation forwarder is the next step. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-13 20:11:04 +05:30
maaz519	77dd5bac82	fix(iios): use extended query parser so nested metadata filters parse NestJS 11 runs Express 5, whose default 'simple' query parser ignores nested params like ?metadata[key]=value — so GET /v1/threads silently dropped the metadata filter, causing e.g. an app's "reuse existing thread for this customer" check to match ANY thread. Set the qs-based 'extended' parser. Verified: filtering by a non-existent metadata value now returns 0 (was returning all); the be-crm support smoke goes 12/12 (was 10/12 once a prior thread existed). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-11 14:33:28 +05:30
maaz519	b918a21083	feat(iios): generic opaque metadata + manual ticket assign (glue prereqs) Generic kernel primitives so app backends (e.g. a CRM support glue) can link their domain to interactions WITHOUT the kernel learning any app vocabulary: - thread: accept an opaque `metadata` bag on create (merged with membership), echo it in listThreads, and filter listThreads by `?metadata[key]=value` (equality on the opaque bag — the kernel never interprets the keys). - support: accept opaque `metadata` on createTicket/escalate (thread bag inherited); add SupportService.assignTo — a policy-gated manual assignment of a ticket to a target actor (POST /v1/support/tickets/:id/assignee). - SDK @insignia/iios-kernel-client 0.1.2: createThread(metadata), listThreads({metadata}) filter, createTicket(metadata), escalate(metadata), assignTicket; ThreadSummary/Ticket expose the opaque bag. Generic-safety gate holds: no crm/customer/lead in kernel code (opaque values only). Tests: +2 (metadata create/filter, ticket metadata + assignTo); 31 pass. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-10 18:39:30 +05:30
maaz519	8c70b6d31f	feat(iios-kernel-client): reconcile to chat-web surface, publish 0.1.1 Brings the shared SDK up to the fuller client chat-web had vendored, so frontends consume one source of truth instead of copying it: - types: Message gains senderId/senderName/attachment/parentInteractionId/ annotations; add Attachment, AnnotationGroup, AnnotationEvent, ThreadSummary, SavedItem, LoginResult; MessageEvents gains `annotation`; SocketLike gains connected + optional timeout. - MessageSocket: onConnected, openThread(opts), richer sendMessage(opts) (attachment/mentions/parentInteractionId, back-compatible with contentRef), pin/save/react via annotate, focus, reconnect-re-subscribe-all. - RestClient: login, listUsers, listThreads, createThread, listSaved, addParticipant. Bump 0.1.0 -> 0.1.1. Whole monorepo still builds (Message change is additive for iios-message-web/iios-support-web/demos). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-07-10 17:49:25 +05:30