diff --git a/.github/workflows/engine-ci.yml b/.github/workflows/engine-ci.yml
index 6dd5087..0ba19fd 100644
--- a/.github/workflows/engine-ci.yml
+++ b/.github/workflows/engine-ci.yml
@@ -42,6 +42,8 @@ jobs:
           run engine/tron.py --selftest
           run engine/gate.py
           run engine/tg.py
+          run engine/test_discord.py
+          run engine/test_discord_routing.py
           run engine/events.py
           run engine/workflow.py
           run engine/bpmn.py
diff --git a/engine/discord.py b/engine/discord.py
new file mode 100644
index 0000000..99f1918
--- /dev/null
+++ b/engine/discord.py
@@ -0,0 +1,77 @@
+"""tron — the Discord line to the operator.
+
+Discord REST is used deliberately: outbound notes post to #tron and the
+engine's normal wake poll reads recent human messages from that one channel.
+The transport is optional; missing credentials or network failures never stop
+the engine.
+"""
+
+import json
+import urllib.parse
+import urllib.request
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent
+ENV = ROOT / ".env"
+# The operator-managed bot credential is shared by TRON worktrees.  Keep the
+# engine-local file first for standalone installs and tests.
+MODES_ENV = ROOT.parents[2] / "tron-modes" / ".env"
+CHANNEL_ID = "1547918251651112971"
+MESSAGE_URL = f"https://discord.com/api/v10/channels/{CHANNEL_ID}/messages"
+_state = {"loaded": False, "token": None, "after": None}
+
+
+def _load():
+    if not _state["loaded"]:
+        _state["loaded"] = True
+        for env in (ENV, MODES_ENV):
+            if not env.exists():
+                continue
+            for line in env.read_text().splitlines():
+                key, _, value = line.partition("=")
+                if key.strip() == "DISCORD_BOT_TOKEN":
+                    _state["token"] = value.strip().strip('"')
+                    break
+            if _state["token"]:
+                break
+    return bool(_state["token"])
+
+
+def _request(url, data=None, timeout=10):
+    request = urllib.request.Request(
+        url, data=data,
+        headers={"Authorization": f"Bot {_state['token']}",
+                 "Content-Type": "application/json"})
+    with urllib.request.urlopen(request, timeout=timeout) as response:
+        return json.loads(response.read().decode())
+
+
+def note(text):
+    """Post one outbound note to #tron; return False on any delivery failure."""
+    if not _load():
+        return False
+    try:
+        _request(MESSAGE_URL, json.dumps({"content": text}).encode())
+        return True
+    except Exception:
+        return False
+
+
+def inbox():
+    """Return unseen human messages in #tron, oldest first, once each."""
+    if not _load():
+        return []
+    try:
+        query = {"limit": 100}
+        if _state["after"]:
+            query["after"] = _state["after"]
+        messages = _request(MESSAGE_URL + "?" + urllib.parse.urlencode(query))
+    except Exception:
+        return []
+    if not isinstance(messages, list):
+        return []
+    if messages:
+        _state["after"] = max(message["id"] for message in messages)
+    return [message.get("content", "").strip() for message in reversed(messages)
+            if not message.get("author", {}).get("bot")
+            and message.get("content", "").strip()]
diff --git a/engine/test_discord.py b/engine/test_discord.py
new file mode 100644
index 0000000..0b81b5e
--- /dev/null
+++ b/engine/test_discord.py
@@ -0,0 +1,83 @@
+"""Behavioral tests for the Discord operator transport."""
+
+import json
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+import discord
+
+
+class DiscordTransportTests(unittest.TestCase):
+    def setUp(self):
+        self.saved_state = dict(discord._state)
+        self.saved_env = discord.ENV
+        self.saved_modes_env = discord.MODES_ENV
+        self.env = Path(tempfile.mkdtemp(prefix="discord-test-")) / ".env"
+        self.env.write_text("DISCORD_BOT_TOKEN=token\n")
+        discord.ENV = self.env
+        discord._state.update(loaded=False, token=None, after=None)
+
+    def tearDown(self):
+        discord.ENV = self.saved_env
+        discord.MODES_ENV = self.saved_modes_env
+        discord._state.update(self.saved_state)
+
+    def test_load_reads_the_shared_tron_modes_environment(self):
+        modes_env = Path(tempfile.mkdtemp(prefix="discord-modes-")) / ".env"
+        modes_env.write_text("DISCORD_BOT_TOKEN=modes-token\n")
+        discord.ENV = self.env.with_name("missing.env")
+        discord.MODES_ENV = modes_env
+        discord._state.update(loaded=False, token=None, after=None)
+
+        self.assertTrue(discord._load())
+        self.assertEqual(discord._state["token"], "modes-token")
+
+    def test_note_posts_to_the_tron_channel(self):
+        calls = []
+
+        class Response:
+            def __enter__(self): return self
+            def __exit__(self, *args): return False
+            def read(self): return b'{"id": "17"}'
+
+        def open_(request, timeout):
+            calls.append((request.full_url, dict(request.header_items()),
+                          request.data, timeout))
+            return Response()
+
+        with patch("urllib.request.urlopen", open_):
+            self.assertTrue(discord.note("fleet is green"))
+
+        url, headers, body, timeout = calls[0]
+        self.assertEqual(url, discord.MESSAGE_URL)
+        self.assertEqual(headers["Authorization"], "Bot token")
+        self.assertEqual(json.loads(body), {"content": "fleet is green"})
+        self.assertEqual(timeout, 10)
+
+    def test_inbox_returns_only_new_human_messages_from_tron_channel(self):
+        class Response:
+            def __enter__(self): return self
+            def __exit__(self, *args): return False
+            def read(self):
+                return json.dumps([
+                    {"id": "23", "content": "status?", "author": {"bot": False}},
+                    {"id": "22", "content": "ignore bot", "author": {"bot": True}},
+                    {"id": "21", "content": "old", "author": {"bot": False}},
+                ]).encode()
+
+        def open_(request, timeout):
+            if "after=23" in request.full_url:
+                class EmptyResponse(Response):
+                    def read(self): return b"[]"
+                return EmptyResponse()
+            return Response()
+
+        with patch("urllib.request.urlopen", open_):
+            self.assertEqual(discord.inbox(), ["old", "status?"])
+            self.assertEqual(discord.inbox(), [])
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/engine/test_discord_routing.py b/engine/test_discord_routing.py
new file mode 100644
index 0000000..47c2796
--- /dev/null
+++ b/engine/test_discord_routing.py
@@ -0,0 +1,48 @@
+"""Behavioral tests for Discord-to-TRON routing."""
+
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+import tron
+import transcript
+
+
+class DiscordRoutingTests(unittest.TestCase):
+    def test_operator_page_is_delivered_to_telegram_and_discord(self):
+        page = "[TRON] Hey boss — the fleet needs you.\n\ndo this\n\nReply here; your answer goes straight back in."
+        with patch.object(transcript.tg, "ask", return_value="continue"), \
+             patch.object(transcript.discord, "note") as discord:
+            self.assertEqual(transcript.operator("do this"), "continue")
+
+        discord.assert_called_once_with(page)
+
+    def test_milestone_is_delivered_to_telegram_and_discord(self):
+        with patch.object(tron.tg, "note") as telegram, \
+             patch.object(tron.discord, "note") as discord:
+            tron.milestone("trunk green")
+
+        telegram.assert_called_once_with("trunk green")
+        discord.assert_called_once_with("trunk green")
+
+    def test_each_normal_discord_message_is_routed_through_parley(self):
+        project = Path(tempfile.mkdtemp(prefix="discord-route-"))
+        received = []
+
+        def parley(path, architect):
+            message = path / "parley.md"
+            if message.exists():
+                received.append(message.read_text())
+                message.unlink()
+
+        with patch.object(tron.discord, "inbox", return_value=["status?", "next?"]), \
+             patch.object(tron, "parley", side_effect=parley), \
+             patch.object(tron, "report_request"):
+            tron.channels(project, object())
+
+        self.assertEqual(received, ["status?", "next?"])
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/engine/transcript.py b/engine/transcript.py
index 9f64e1d..2990ba9 100644
--- a/engine/transcript.py
+++ b/engine/transcript.py
@@ -10,6 +10,7 @@
 import time
 
 import events
+import discord
 import tg
 
 LOG_PATH = None
@@ -53,9 +54,10 @@ def operator(context):
         print(f"[TRON -> OPERATOR] {context}")
         log_entry("TRON -> OPERATOR", context)
         events.emit("page", context=context[:200])
-        ans = tg.ask("[TRON] Hey boss — the fleet needs you.\n\n"
-                     + context + "\n\nReply here; your answer goes "
-                     "straight back in.")
+        page = ("[TRON] Hey boss — the fleet needs you.\n\n" + context
+                + "\n\nReply here; your answer goes straight back in.")
+        discord.note(page)
+        ans = tg.ask(page)
         if ans is None:
             try:
                 ans = input("OPERATOR> ").strip()
diff --git a/engine/tron.py b/engine/tron.py
index e20032e..2fefe65 100644
--- a/engine/tron.py
+++ b/engine/tron.py
@@ -26,6 +26,7 @@
 import prompts
 import roster
 import bootup
+import discord
 import tg
 import transcript
 import workflow
@@ -83,11 +84,12 @@ def ablation(value):
 
 # ---------------------------------------------------------------- routing
 def milestone(text):
-    """Milestone narration rides Telegram unless TRON_QUIET says a
-    harness batch is driving. Only the narration is quietable — pages
+    """Milestone narration rides Telegram and Discord unless TRON_QUIET
+    says a harness batch is driving. Only narration is quietable — pages
     (transcript.operator) always reach the operator."""
     if not os.environ.get("TRON_QUIET"):
         tg.note(text)
+        discord.note(text)
 
 
 def interpret(agent, architect, reply, context="", tag=""):
@@ -271,6 +273,9 @@ def report_request(path, architect):
 def channels(path, architect):
     """Every operator-initiated channel, one poll."""
     parley(path, architect)
+    for text in discord.inbox():
+        (path / "parley.md").write_text(text)
+        parley(path, architect)
     report_request(path, architect)