diff --git a/README.md b/README.md
index 101ff23..ed3732d 100644
--- a/README.md
+++ b/README.md
@@ -180,6 +180,11 @@ Grok Build has no Claude `SessionStart` hook. Copy
 3. Use a **per-agent** `notification_file` / `seen_file` (do not share
    Claude's `/tmp/iak-new-messages.txt`).
 
+**Footgun 2:** two wake paths (a webhook receiver *and* the poller nudge, or the
+app's own scheduled check) answer every mention twice. Declare the one that owns
+the wake in `poller.wake_path` (`nudge` | `webhook` | `automation` | `none`);
+the poller refuses to nudge unless it is `nudge`.
+
 **Footgun:** `nudge_mode: "none"` only writes the notify file; the agent will
 look dead until a human types `check room`. Full write-up:
 [docs/grok-build.md](docs/grok-build.md).
diff --git a/config/codex.desktop.example.json b/config/codex.desktop.example.json
index b2c6365..f04ab75 100644
--- a/config/codex.desktop.example.json
+++ b/config/codex.desktop.example.json
@@ -36,7 +36,8 @@
   "heartbeat_file": "/tmp/iak-poller.heartbeat",
     "handle": "@CodexMB",
     "interval_sec": 60,
-    "nudge_mode": "command",
+    "wake_path": "webhook",
+  "nudge_mode": "none",
     "nudge_command": "/ABSOLUTE/PATH/ide-agent-kit/tools/codex_gui_nudge.sh",
     "notification_file": "/tmp/codex-room-notifications.txt",
     "seen_file": "/tmp/codex-room-seen.txt"
diff --git a/docs/AGENT-ONBOARDING.md b/docs/AGENT-ONBOARDING.md
index 8c4466f..501d8d3 100644
--- a/docs/AGENT-ONBOARDING.md
+++ b/docs/AGENT-ONBOARDING.md
@@ -75,6 +75,14 @@ forever. Pick per runtime:
 Another agent posts a question addressed to the new agent, **everyone hands
 off keyboards**, and the new agent answers by itself. If silence: check, in
 order — poller running? notification file growing? wake path firing?
+**One wake path.** Set `poller.wake_path` to the single thing that wakes the
+agent: `"nudge"` (this poller's tmux/command nudge, the default), `"webhook"`
+(a webhook receiver wakes it), `"automation"` (the app's own scheduled check)
+or `"none"`. With `webhook` or `automation` the poller still delivers the
+notification file but refuses to nudge, and warns at start if `nudge_mode` is
+also set. Two wake paths mean two answers to every mention (codexmb,
+2026-09-01).
+
 (@grok's failure was step 4: `nudge_mode` was `"none"`.)
 
 ## 6. Key hygiene
diff --git a/src/config.mjs b/src/config.mjs
index 90c0e4a..64df2a8 100644
--- a/src/config.mjs
+++ b/src/config.mjs
@@ -16,7 +16,11 @@ const DEFAULT_CONFIG = {
     seen_file: '/tmp/iak-seen-ids.txt',
     api_key: '',
     nudge_mode: 'tmux',
-    nudge_command: ''
+    nudge_command: '',
+    // Which path wakes the agent: 'nudge' (this poller), 'webhook' (a
+    // webhook receiver), 'automation' (the app's own scheduled check) or
+    // 'none'. Exactly one. Empty = 'nudge' unless nudge_mode is 'none'.
+    wake_path: ''
   },
   dm_poller: {
     enabled: false,
diff --git a/src/team-relay/room-poller.mjs b/src/team-relay/room-poller.mjs
index 903e54f..ef9bb7a 100644
--- a/src/team-relay/room-poller.mjs
+++ b/src/team-relay/room-poller.mjs
@@ -176,6 +176,12 @@ export async function startRoomPoller({ rooms, apiKey, handle, interval, config,
   const session = sessionOpt || config?.tmux?.ide_session || config?.tmux?.default_session || 'claude';
   const nudgeText = config?.tmux?.nudge_text || 'check rooms';
   const nudgeMode = config?.poller?.nudge_mode || 'tmux';
+  // Exactly one wake path per agent (issue #90 item 4). On 2026-09-01 the
+  // codexmb poller nudged on top of a webhook receiver and the app's own
+  // scheduled check, and every mention got two or three answers. The path
+  // is a config fact: this poller nudges only when it owns the wake.
+  const wakePath = String(config?.poller?.wake_path || (nudgeMode === 'none' ? 'none' : 'nudge')).toLowerCase();
+  const pollerOwnsWake = wakePath === 'nudge';
   const nudgeCommandText = config?.poller?.nudge_command || '';
   const pollInterval = parsePositiveInt(interval || config?.poller?.interval_sec, 30);
   const selfHandle = normalizeHandle(resolveSelfHandle({ explicit: handle, config }));
@@ -191,6 +197,7 @@ export async function startRoomPoller({ rooms, apiKey, handle, interval, config,
   let lastNudgeAt = 0;
   function nudgeGate(hasPriority) {
     if (!hasPriority) return { fire: false, why: 'no owner/mention in batch' };
+    if (!pollerOwnsWake) return { fire: false, why: `wake path is ${wakePath}, not this poller` };
     const now = Date.now();
     if (now - lastNudgeAt < nudgeCooldownSec * 1000) {
       return { fire: false, why: `cooldown ${nudgeCooldownSec}s` };
@@ -214,6 +221,11 @@ export async function startRoomPoller({ rooms, apiKey, handle, interval, config,
   console.log(`  interval: ${pollInterval}s`);
   console.log(`  notification file: ${notifyFile}`);
   console.log(`  nudge mode: ${nudgeMode}`);
+  console.log(`  wake path: ${wakePath}${pollerOwnsWake ? '' : ' (this poller will not nudge)'}`);
+  if (!pollerOwnsWake && nudgeMode !== 'none') {
+    console.error(`  WARNING: poller.nudge_mode is '${nudgeMode}' but poller.wake_path is '${wakePath}': ` +
+      'the wake belongs to another path, so nudges from this poller are refused. Set nudge_mode to none to silence this.');
+  }
   if (nudgeMode === 'tmux') {
     console.log(`  tmux session: ${session} (optional)`);
   } else if (nudgeMode === 'command') {
diff --git a/test/wake-path.test.mjs b/test/wake-path.test.mjs
new file mode 100644
index 0000000..7754f1b
--- /dev/null
+++ b/test/wake-path.test.mjs
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// Issue #90 item 4: exactly one wake path. With wake_path set to another
+// path the poller delivers the notification but never nudges; with the
+// default it nudges (positive control, same stubs).
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync, writeFileSync, chmodSync, mkdirSync, existsSync, readFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import path from 'node:path';
+import test from 'node:test';
+import { startRoomPoller } from '../src/team-relay/room-poller.mjs';
+
+async function runPoll(dir, pollerOverrides) {
+  const stubDir = path.join(dir, 'bin'); mkdirSync(stubDir, { recursive: true });
+  const stub = path.join(stubDir, 'curl');
+  writeFileSync(stub, `#!/bin/sh
+case "$*" in *limit=50*) echo "[]";; *) echo '[{"id":"o1","from":"petrus","body":"claudemm are you there","created_at":"2026-09-02T00:00:01Z"}]';; esac
+`);
+  chmodSync(stub, 0o755);
+  const marker = path.join(dir, 'nudged');
+  const savedPath = process.env.PATH; process.env.PATH = `${stubDir}:${savedPath}`;
+  const logs = []; const origLog = console.log; const origErr = console.error;
+  console.log = (...a) => logs.push(a.join(' ')); console.error = (...a) => logs.push(a.join(' '));
+  let timers;
+  try {
+    timers = await startRoomPoller({
+      rooms: ['r'], apiKey: 'k', handle: '@t', interval: 3600,
+      config: { poller: { seen_file: path.join(dir, 'seen'), notification_file: path.join(dir, 'notify'), heartbeat_file: path.join(dir, 'hb'),
+        nudge_mode: 'command', nudge_command: `touch ${marker}`, ...pollerOverrides }, queue: { path: path.join(dir, 'q.jsonl') } }
+    });
+  } finally {
+    if (timers?.roomTimer) clearInterval(timers.roomTimer);
+    if (timers?.dmTimer) clearInterval(timers.dmTimer);
+    console.log = origLog; console.error = origErr; process.env.PATH = savedPath;
+  }
+  return { nudged: existsSync(marker), notified: existsSync(path.join(dir, 'notify')) && /petrus: claudemm are you there/.test(readFileSync(path.join(dir, 'notify'), 'utf8')), log: logs.join('\n') };
+}
+
+test('wake_path webhook: notification delivered, nudge refused with the reason, warning at start', async () => {
+  const dir = mkdtempSync(path.join(tmpdir(), 'iak-wake-'));
+  try {
+    const r = await runPoll(dir, { wake_path: 'webhook' });
+    assert.equal(r.notified, true);
+    assert.equal(r.nudged, false, 'poller must not nudge when the webhook owns the wake');
+    assert.match(r.log, /wake path is webhook, not this poller/);
+    assert.match(r.log, /WARNING: poller.nudge_mode is 'command' but poller.wake_path is 'webhook'/);
+  } finally { rmSync(dir, { recursive: true, force: true }); }
+});
+
+test('default wake_path: the same owner message nudges (positive control)', async () => {
+  const dir = mkdtempSync(path.join(tmpdir(), 'iak-wake-'));
+  try {
+    const r = await runPoll(dir, {});
+    assert.equal(r.notified, true);
+    assert.equal(r.nudged, true, 'control: with the poller owning the wake, the nudge command runs');
+    assert.match(r.log, /wake path: nudge/);
+  } finally { rmSync(dir, { recursive: true, force: true }); }
+});