diff --git a/backend/__tests__/service/operatorOnlyPodPolicy.test.js b/backend/__tests__/service/operatorOnlyPodPolicy.test.js
new file mode 100644
index 0000000000..73fece93cd
--- /dev/null
+++ b/backend/__tests__/service/operatorOnlyPodPolicy.test.js
@@ -0,0 +1,64 @@
+const mongoose = require('mongoose');
+const { setupMongoDb, closeMongoDb, clearMongoDb } = require('../utils/testUtils');
+const express = require('express');
+const request = require('supertest');
+const { hash } = require('../../utils/secret');
+const { AgentInstallation } = require('../../models/AgentRegistry');
+const app = express();
+app.use('/api/agents/runtime', require('../../routes/agentsRuntime'));
+const User = require('../../models/User');
+const Pod = require('../../models/Pod');
+const Integration = require('../../models/Integration');
+const { operatorOnlyPodAllowed } = require('../../services/operatorOnlyPodPolicy');
+let owner; let bot; let pod; let installations;
+beforeAll(setupMongoDb);
+afterAll(closeMongoDb);
+beforeEach(async () => {
+  await clearMongoDb();
+  owner = await User.create({ username: 'native-owner', email: 'native-owner@test.com', password: 'password123' });
+  bot = await User.create({ username: 'native-fixture', email: 'native-fixture@test.com', password: 'password123', isBot: true, botMetadata: { agentName: 'native-fixture', instanceId: 'default' }, agentRuntimeTokens: [{ tokenHash: hash('cm_agent_fixture'), label: 'fixture', createdAt: new Date(), lastUsedAt: new Date() }] });
+  pod = await Pod.create({ name: 'Private', type: 'chat', createdBy: owner._id,
+    members: [owner._id, bot._id], joinPolicy: 'invite-only', publicRead: false, communityListed: false });
+  installations = [{ agentName: 'native-fixture', instanceId: 'default', podId: pod._id, installedBy: owner._id }];
+});
+const allowed = () => operatorOnlyPodAllowed(String(pod._id), installations, bot);
+test('only private operator and exact listener are allowed', async () => {
+  expect(await allowed()).toBe(true);
+  expect(await operatorOnlyPodAllowed(String(pod._id), installations, null)).toBe(true);
+  expect(await operatorOnlyPodAllowed('invalid', installations, bot)).toBe(false);
+  expect(await operatorOnlyPodAllowed(String(pod._id), [], bot)).toBe(false);
+});
+test.each([false, true])('added human/bot (%s) revokes eligibility', async (isBot) => {
+  const peer = await User.create({ username: 'peer', email: 'peer@test.com', password: 'password123', isBot });
+  await Pod.updateOne({ _id: pod._id }, { $push: { members: peer._id } });
+  expect(await allowed()).toBe(false);
+});
+test.each([{ type: 'agent-dm' }, { type: 'agent-room' }, { type: 'agent-admin' }, { publicRead: true }, { communityListed: true }, { joinPolicy: 'open' },
+  { createdBy: new mongoose.Types.ObjectId() }, { members: [] }])('unsafe pod %j is refused', async (change) => {
+  await Pod.updateOne({ _id: pod._id }, { $set: change });
+  expect(await allowed()).toBe(false);
+});
+test('missing listener, mixed owners and other identity tokens are refused', async () => {
+  expect(await operatorOnlyPodAllowed(String(pod._id), installations, { _id: owner._id })).toBe(false);
+  installations.push({ ...installations[0], installedBy: new mongoose.Types.ObjectId() });
+  expect(await allowed()).toBe(false);
+  installations.pop();
+  await User.deleteOne({ _id: bot._id });
+  expect(await allowed()).toBe(false);
+});
+test('active bridge revokes private audience', async () => {
+  await Integration.create({ podId: pod._id, scope: 'pod', type: 'slack', status: 'connected',
+    isActive: true, createdBy: owner._id, config: {} });
+  expect(await allowed()).toBe(false);
+});
+
+test('actual runtime-token route checks current Mongo audience and denies unknown credentials', async () => {
+  await AgentInstallation.create({ ...installations[0], version: '1.0.0', status: 'active', scopes: ['context:read'] });
+  const get = (token) => request(app).get(`/api/agents/runtime/pods/${pod._id}/operator-only`).set('Authorization', `Bearer ${token}`);
+  expect((await get('cm_agent_invalid')).status).toBe(401);
+  const good = await get('cm_agent_fixture');
+  expect(good.status).toBe(200);
+  expect(good.body).toEqual({ allowed: true, podId: String(pod._id), agentName: 'native-fixture', instanceId: 'default' });
+  await Pod.updateOne({ _id: pod._id }, { $push: { members: new mongoose.Types.ObjectId() } });
+  expect((await get('cm_agent_fixture')).status).toBe(403);
+});
diff --git a/backend/__tests__/unit/routes/agentsRuntime.installations.test.js b/backend/__tests__/unit/routes/agentsRuntime.installations.test.js
index cd1629af51..9816116e92 100644
--- a/backend/__tests__/unit/routes/agentsRuntime.installations.test.js
+++ b/backend/__tests__/unit/routes/agentsRuntime.installations.test.js
@@ -2,6 +2,9 @@
 
 jest.mock('jsonwebtoken', () => ({ sign: jest.fn(), verify: jest.fn(), decode: jest.fn() }));
 
+let mockOperatorAllowed = true;
+jest.mock('../../../services/operatorOnlyPodPolicy', () => ({ operatorOnlyPodAllowed: jest.fn(async () => mockOperatorAllowed) }));
+
 const mockInstallation = {
   podId: 'pod-1',
   instanceId: 'writer',
@@ -103,3 +106,22 @@ describe('GET /installations runtime adapter projection', () => {
     }
   });
 });
+
+describe('GET /pods/:podId/operator-only', () => {
+  test('projects authenticated identity or refuses without private details', async () => {
+    mockOperatorAllowed = true;
+    const ok = await request(app).get('/api/agents/runtime/pods/pod-1/operator-only');
+    expect(ok.status).toBe(200);
+    expect(ok.headers['cache-control']).toBe('no-store');
+    expect(ok.body).toEqual({ allowed: true, podId: 'pod-1', instanceId: 'writer' });
+    mockOperatorAllowed = false;
+    const denied = await request(app).get('/api/agents/runtime/pods/pod-1/operator-only');
+    expect(denied.status).toBe(403);
+  });
+  test('database failure refuses instead of authorizing', async () => {
+    require('../../../services/operatorOnlyPodPolicy').operatorOnlyPodAllowed.mockRejectedValueOnce(Error('DB unavailable'));
+    const result = await request(app).get('/api/agents/runtime/pods/pod-1/operator-only');
+    expect(result.status).toBe(503);
+    expect(result.body).not.toHaveProperty('allowed');
+  });
+});
diff --git a/backend/routes/agentsRuntime.ts b/backend/routes/agentsRuntime.ts
index 61fb4b1e55..a31f0ae1f3 100644
--- a/backend/routes/agentsRuntime.ts
+++ b/backend/routes/agentsRuntime.ts
@@ -14,6 +14,7 @@ const MAX_UPSTREAM_STATUS = 599;
 // ESM import shape but has trouble tracing rate-limit middleware through
 // require() returns; using `import` here makes the recognition unambiguous.
 import rateLimit from 'express-rate-limit';
+import { operatorOnlyPodAllowed } from '../services/operatorOnlyPodPolicy';
 import { platformIpRateLimit } from '../middleware/platformRateLimit';
 
 const express = require('express');
@@ -502,6 +503,22 @@ router.delete('/messages/:messageId/claim', phase4RateLimit, agentRuntimeAuth, a
   }
 });
 
+// Fail closed for full-tool in-process harnesses. Re-read before every turn.
+router.get('/pods/:podId/operator-only', phase4RateLimit, agentRuntimeAuth, async (req: any, res: any) => {
+  res.set('Cache-Control', 'no-store');
+  try {
+    const installations = req.agentInstallations || [];
+    if (!await operatorOnlyPodAllowed(req.params.podId, installations, req.agentUser)) {
+      return res.status(403).json({ code: 'operator_only_required' });
+    }
+    const identity = installations[0];
+    return res.json({ allowed: true, podId: req.params.podId,
+      agentName: identity.agentName, instanceId: identity.instanceId || 'default' });
+  } catch {
+    return res.status(503).json({ code: 'operator_only_unavailable' });
+  }
+});
+
 router.get('/installations', phase4RateLimit, agentRuntimeAuth, async (req: any, res: any) => {
   try {
     const installations = req.agentInstallations || [];
diff --git a/backend/services/operatorOnlyPodPolicy.ts b/backend/services/operatorOnlyPodPolicy.ts
new file mode 100644
index 0000000000..bb7abebfc5
--- /dev/null
+++ b/backend/services/operatorOnlyPodPolicy.ts
@@ -0,0 +1,37 @@
+import { Types } from 'mongoose';
+import Pod from '../models/Pod';
+import User from '../models/User';
+import { podIsBridged } from './outsiderGrantPodEligibility';
+import AgentIdentityService from './agentIdentityService';
+
+/** Full-tool native sessions accept only their human operator and exact agent. */
+export const operatorOnlyPodAllowed = async (
+  podId: string, installations: any[], agentUser: any,
+): Promise<boolean> => {
+  if (!/^[a-f0-9]{24}$/i.test(podId) || !installations.length) return false;
+  const first = installations[0];
+  const owner = String(first.installedBy || '');
+  const instanceId = first.instanceId || 'default';
+  if (!/^[a-f0-9]{24}$/i.test(owner) || installations.some((row) => (
+    String(row.installedBy || '') !== owner || row.agentName !== first.agentName
+    || (row.instanceId || 'default') !== instanceId
+  )) || !installations.some((row) => String(row.podId) === podId)) return false;
+  const listener = await User.findOne({
+    username: AgentIdentityService.buildAgentUsername(
+      AgentIdentityService.resolveAgentType(first.agentName), instanceId,
+    ),
+    isBot: true,
+  }).select('_id').lean();
+  if (!listener || (agentUser && String(agentUser._id) !== String(listener._id))) return false;
+  const human = await User.findById(owner).select('isBot botType').lean();
+  if (!human || human.isBot || human.botType) return false;
+  const pod = await Pod.findById(new Types.ObjectId(podId))
+    .select('type createdBy members joinPolicy publicRead communityListed').lean();
+  if (!pod || ['agent-dm', 'agent-room', 'agent-admin'].includes(pod.type)
+    || pod.joinPolicy !== 'invite-only' || pod.publicRead !== false
+    || pod.communityListed !== false || String(pod.createdBy) !== owner) return false;
+  const members = (pod.members || []).map(String);
+  if (!members.includes(owner) || !members.includes(String(listener._id))
+    || members.some((member) => member !== owner && member !== String(listener._id))) return false;
+  return !await podIsBridged(String(pod._id));
+};
diff --git a/cli/__tests__/run-loop.test.mjs b/cli/__tests__/run-loop.test.mjs
index 9753b978ba..d01ee8517a 100644
--- a/cli/__tests__/run-loop.test.mjs
+++ b/cli/__tests__/run-loop.test.mjs
@@ -47,7 +47,7 @@ await jest.unstable_mockModule('../src/lib/pod-focus.js', () => ({
 }));
 
 const { createClient } = await import('../src/lib/api.js');
-const { performRun } = await import('../src/commands/agent.js');
+const { performRun } = await import('../src/runtime.js');
 const {
   getSession,
   setSession,
diff --git a/cli/src/runtime.js b/cli/src/runtime.js
new file mode 100644
index 0000000000..8a2a185eb2
--- /dev/null
+++ b/cli/src/runtime.js
@@ -0,0 +1,23 @@
+/**
+ * In-process runtime entry for harness plugins. This is the same consumer used
+ * by `commonly agent run`: claims, cascade admission, pod-separated batches,
+ * memory, delivery suppression and acknowledgement stay in the CLI.
+ *
+ * A native adapter implements `spawn(prompt, options)` and returns a Promise
+ * of `{ text, newSessionId? }`. Resolve only for the exact completed input,
+ * never merely because a shared session became idle. `options.metadata.event`
+ * identifies the source pod/batch; native adapters must keep separate sessions
+ * per pod. Runtime tokens in options are credentials, never prompt content.
+ *
+ * `performRun` returns `{ stop() }`. Stop prevents further polls but does not
+ * cancel an already-started adapter or HTTP request. A plugin owns its adapter
+ * cancellation/lifetime and must not cancel unrelated human work.
+ *
+ * This entry does not register/login an agent, enforce an OS sandbox around
+ * an in-process harness, or make mutable global process.env safe per turn.
+ * Full-tool native sessions must verify each bound pod through the deployed
+ * GET /api/agents/runtime/pods/:podId/operator-only policy before a turn and
+ * before releasing its response. This entry alone does not authorize a pod.
+ * Do not replace adapter-scoped credentials with a shared global token.
+ */
+export { performRun } from './commands/agent.js';