Release 0.4.1

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

app/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "frame-control",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "frame-control",
-      "version": "0.4.0",
+      "version": "0.4.1",
       "license": "MIT",
       "devDependencies": {
         "electron": "^44.4.5",

app/package.json

@@ -1,7 +1,7 @@
 {
   "name": "frame-control",
   "productName": "Frame Control",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Desktop app for managing a Valve Steam Frame over SSH",
   "private": true,
   "main": "main.js",

docs/frame-control.md

@@ -88,8 +88,13 @@ counts them while they run.
   name your networks, and switch headsets. See [devices.md](devices.md).
 - **One-click tools**: SSH or SFTP in a terminal window, Steam Link, and remote
   desktop (Windows App on macOS, Remote Desktop on Windows, Remmina or FreeRDP on
-  Linux). Sleep, restart and shut down open a terminal window because SteamOS
-  asks for the sudo password over SSH.
+  Linux). Remote desktop first checks that the Frame's xrdp answers on port
+  3389 (Developer Mode turns it on). On Windows it opens a connection file for
+  user `steamos`, because `mstsc /v:` alone offers your Windows account, which
+  xrdp turns away. Accept the warning about the Frame's own certificate, then
+  sign in with the Developer Mode password. Sleep, restart and
+  shut down open a terminal window because SteamOS asks for the sudo password
+  over SSH.
 
 ## How it works
 

docs/privacy.md

@@ -107,7 +107,14 @@ wrote, a short reference shown after sending, and the diagnostics below. Your
 email address goes with it only if you tick **The maintainer may contact me
 with follow-up questions** (the report then carries `contact_followup: true`);
 it's filled in from **Contact email** below when you've agreed there. It has its own random id, so it isn't linked to
-your analytics events.
+your analytics events. With that box ticked, the address also becomes your
+**Contact email** below with follow-up questions ticked, so you remove it there
+like any other. If it's a different address from the one saved there, it
+replaces it, and update notices stop until you turn them on again (they were
+agreed for the old address); the form says so before you send. The report then also
+carries this copy's contact id and change number (`contact_id`, `contact_rev`,
+see below), so removing or changing the address later takes back the
+follow-up permission given with the report too.
 
 With **Include diagnostics** ticked (the default), the report adds:
 
@@ -141,8 +148,8 @@ are two separate choices, both off until you tick them:
 | **The maintainer may contact me with follow-up questions** | Questions about problem reports you send, mostly |
 
 You're asked once, in a bar at the top of the page, after the Frame has
-connected for the first time, and never while or straight after the
-first-run privacy notice is showing. **No thanks** hides it for good, and it isn't
+connected for the first time, and never in the same visit as the first-run
+privacy notice. **No thanks** hides it for good, and it isn't
 shown again even if you ignore it. **Contact email** in **Privacy & updates**
 is where you add, change or remove the address and either choice at any time.
 
@@ -151,7 +158,10 @@ Frame Control's PostHog project, the same place as problem reports, as a
 `contact_consent` event with `email`, `updates`, `followup`, `action` (`set`
 or `withdraw`) and the common properties above. Only the maintainer can read
 that project, and nothing in it is published or shared. It's sent only when
-you save, whatever the analytics settings are, because you chose to. It
+you save, or when you send a problem report with follow-up questions ticked,
+whatever the analytics settings are, because you chose to. With a report, the
+address and choices are saved before the report is sent and stay saved if it
+fails; like any change, they're sent as soon as PostHog can be reached. It
 carries its own random contact id, not the analytics id, so it isn't linked
 to your usage events, and a `rev` number that goes up with each change, so
 the newest choice always wins. Like everything else sent, it's listed under
@@ -164,7 +174,11 @@ deletes it from this computer, including from the **Show what's been sent**
 log (in earlier contact events and problem reports), and sends a `withdraw`
 event with no address in it. The maintainer's list only uses the newest event from each copy, so from
 then on the address isn't listed for either choice. Unticking one choice
-works the same way for that choice. If you're offline, the change waits on
+works the same way for that choice. This also covers problem reports you sent
+from this copy with follow-up questions ticked: if your newest choice since the
+report (by change number, not the clock) no longer agrees to follow-up
+questions at that address, the maintainer's inbox shows the permission as
+withdrawn and leaves the address out. If you're offline, the change waits on
 this computer and is sent when PostHog can be reached. The earlier event
 stays in PostHog until its data retention removes it; to have it deleted
 sooner, ask the maintainer (for example in a problem report).

docs/streaming.md

@@ -25,6 +25,20 @@ The confidence labels are the same as in [ssh.md](ssh.md).
 documents it. Use Windows App (RDP) when you want a proper Linux desktop on the
 Mac with keyboard, mouse, and clipboard.
 
+**Verified 2026-09-30** (Frame BUILD_ID 20260925.6191901, Windows 11 25H2,
+Remote Desktop Connection): signing in to xrdp as `steamos` with the Developer
+Mode password opens a Plasma (X11) desktop within about 6 seconds.
+
+- xrdp has no NLA, so the client shows a certificate warning (xrdp's own
+  `www.xrdp.org` certificate) and then xrdp's own login box. Frame Control
+  fills in `steamos` there on Windows, Remmina and FreeRDP.
+- The desktop is a separate login session (Xorg on display `:10`), not the
+  headset's view. It uses about 1.3 GB of the Frame's memory.
+- Closing the client leaves the session running, and the next login
+  reconnects to it. To end it over SSH, find it with `loginctl list-sessions`
+  and run `loginctl terminate-session <id>`. That doesn't touch the headset's
+  gamescope or SteamVR session.
+
 ## B. Show the Mac's desktop inside the Frame
 
 The Frame's VR streaming uses **SteamVR** on the host. Linux hosts had

tests/test_contact.py

@@ -59,6 +59,16 @@ class Contact(Base):
         self.assertEqual(fc.load()["email"], "")
         self.assertEqual(self.got, [])
 
+    def test_only_a_real_true_counts_as_consent(self):
+        for wrong in ("false", "true", 1, 0, [], {}):
+            with self.assertRaisesRegex(ValueError, "true or false"):
+                fc.save({"email": "me@example.com", "updates": wrong, "followup": True})
+            with self.assertRaisesRegex(ValueError, "true or false"):
+                fr.send({**REPORT, "contact": "me@example.com", "contactFollowup": wrong})
+        self.assertEqual((fc.load()["email"], self.got), ("", []))
+        fc.save({"email": "me@example.com", "updates": True})  # left out is no
+        self.assertEqual((fc.load()["updates"], fc.load()["followup"]), (True, False))
+
     def test_each_choice_is_sent_privately_on_its_own(self):
         fc.save({"email": " me@example.com ", "updates": True})
         fc.save({"email": "me@example.com", "updates": False, "followup": True})
@@ -239,15 +249,121 @@ class Contact(Base):
 
     # ---- reports and the maintainer's list
 
+    def reports(self):
+        return [e["properties"] for e in self.events() if e["event"] == "problem_report"]
+
     def test_a_report_carries_the_address_only_with_follow_up_consent(self):
         fr.send({**REPORT, "contact": "me@example.com"})
+        self.assertFalse(fc.FILE.exists())  # no follow-up: nothing kept, nothing linked
         fr.send({**REPORT, "contact": "me@example.com", "contactFollowup": True})
-        without, with_ = (e["properties"] for e in self.events())
-        self.assertEqual((without["contact"], without["contact_followup"]), ("", False))
+        without, with_ = self.reports()
+        self.assertEqual((without["contact"], without["contact_followup"], without["contact_id"]), ("", False, ""))
         self.assertEqual((with_["contact"], with_["contact_followup"]), ("me@example.com", True))
+        self.assertEqual((with_["contact_id"], with_["contact_rev"]), (fc.load()["id"], fc.load()["rev"]))
+        self.assertNotEqual(with_["contact_id"], tm.settings()["id"])  # not the analytics id
         with self.assertRaisesRegex(ValueError, "email address"):
             fr.send({**REPORT, "contact": "discord:me", "contactFollowup": True})
 
+    def test_follow_up_given_with_a_report_is_kept_and_removed_in_settings(self):
+        fr.send({**REPORT, "contact": "me@example.com", "contactFollowup": True})
+        s = fc.state()
+        self.assertEqual((s["email"], s["updates"], s["followup"]), ("me@example.com", False, True))
+        consent = [e for e in self.events() if e["event"] == "contact_consent"]
+        self.assertEqual([(e["properties"]["action"], e["properties"]["rev"]) for e in consent], [("set", 1)])
+        self.assertEqual(consent[0]["distinct_id"], self.reports()[0]["contact_id"])
+        fr.send({**REPORT, "contact": "ME@example.com", "contactFollowup": True})  # already agreed
+        self.assertEqual(len([e for e in self.events() if e["event"] == "contact_consent"]), 1)
+        self.assertEqual(self.reports()[1]["contact_rev"], 1)
+        fc.save({"email": ""})  # Remove my email
+        last = self.events()[-1]
+        self.assertEqual((last["properties"]["action"], last["properties"]["email"], last["properties"]["rev"]),
+                         ("withdraw", "", 2))
+        logged = [e["properties"].get("contact") for e in tm._read_lines(tm.SENT) if e["event"] == "problem_report"]
+        self.assertEqual(logged, ["<removed>", "<removed>"])
+
+    def test_a_report_to_another_address_replaces_it_with_follow_up_only(self):
+        """Update notices were agreed for the old address, not the new one (the form says so)."""
+        fc.save({"email": "old@example.com", "updates": True})
+        fr.send({**REPORT, "contact": "new@example.com", "contactFollowup": True})
+        s = fc.state()
+        self.assertEqual((s["email"], s["updates"], s["followup"]), ("new@example.com", False, True))
+        self.assertEqual(self.reports()[0]["contact_rev"], 2)
+        fc.save({"email": "new@example.com", "updates": True, "followup": False})
+        fr.send({**REPORT, "contact": "NEW@example.com", "contactFollowup": True})  # same address: kept
+        s = fc.state()
+        self.assertEqual((s["email"], s["updates"], s["followup"]), ("new@example.com", True, True))
+
+    def test_a_removal_while_the_report_saves_its_address_still_counts(self):
+        """Removed while the report's own consent is on its way: the report keeps that consent's
+        rev (so the removal is newer) and is logged without the address."""
+        post, removed = tm.post, []
+
+        def slow_post(events, **kw):
+            post(events, **kw)
+            if not removed and events[0]["event"] == "contact_consent":
+                removed.append(fc.save({"email": ""}))  # Remove my email, mid-send
+        with mock.patch.object(tm, "post", side_effect=slow_post):
+            fr.send({**REPORT, "contact": "me@example.com", "contactFollowup": True})
+        report = self.reports()[0]
+        self.assertEqual((report["contact_rev"], fc.load()["rev"], fc.state()["email"]), (1, 2, ""))
+        consents = [[e["distinct_id"], e["properties"]["email"], e["properties"]["followup"], e["properties"]["rev"]]
+                    for e in self.events() if e["event"] == "contact_consent"]
+        row = self.report_row(cid=report["contact_id"], rev=report["contact_rev"])
+        fr.mark_withdrawn([row], consents)
+        self.assertEqual(row[10], "withdrawn")
+        logged = [e["properties"]["contact"] for e in tm._read_lines(tm.SENT) if e["event"] == "problem_report"]
+        self.assertEqual(logged, ["<removed>"])
+
+    def report_row(self, contact="me@example.com", followup=True, cid="copy", rev=1):
+        return ["2026-09-10T10:00:00Z", "AB12CD34", "bug", "RDP", "It never connects.", contact,
+                "0.4.0", "Windows", "", "", followup, cid, rev]
+
+    def test_a_later_change_takes_back_a_reports_follow_up_permission(self):
+        reports = [self.report_row(),                                   # removed later
+                   self.report_row(cid="other"),                        # another copy, still agrees
+                   self.report_row(rev=3),                              # sent after the removal
+                   self.report_row(cid="moved"),                        # address changed later
+                   self.report_row(cid="news-only"),                    # follow-up unticked later
+                   self.report_row(contact="Me@Example.com", cid="case"),  # same address, any case
+                   self.report_row(cid="", followup=True),              # no contact id: left alone
+                   self.report_row(cid="bad", rev="x")]                 # malformed rev: treated as 0
+        consents = [["copy", "me@example.com", True, 1], ["copy", "", False, 2],
+                    ["other", "me@example.com", True, 1], ["other", "me@example.com", True, 2],
+                    ["moved", "new@example.com", True, 2], ["news-only", "me@example.com", False, 2],
+                    ["case", "me@example.com", True, 2], ["bad", "", False, 1], ["short"], ["x", "", False, "?"]]
+        fr.mark_withdrawn(reports, consents)
+        self.assertEqual([r[10] for r in reports],
+                         ["withdrawn", True, True, "withdrawn", "withdrawn", True, True, "withdrawn"])
+
+    def test_the_change_number_decides_not_the_clock(self):
+        """The clock went back between the report and the removal: the removal still counts."""
+        fr.send({**REPORT, "contact": "me@example.com", "contactFollowup": True})
+        with mock.patch.object(fc.time, "gmtime", return_value=time.gmtime(0)):
+            fc.save({"email": ""})
+        report = self.reports()[0]
+        row = self.report_row(cid=report["contact_id"], rev=report["contact_rev"])
+        consents = [[e["distinct_id"], e["properties"]["email"], e["properties"]["followup"], e["properties"]["rev"]]
+                    for e in self.events() if e["event"] == "contact_consent"]
+        self.assertEqual(self.events()[-1]["timestamp"], "1970-01-01T00:00:00Z")
+        fr.mark_withdrawn([row], consents)
+        self.assertEqual(row[10], "withdrawn")
+
+    def test_the_inbox_shows_withdrawn_follow_up_without_the_address(self):
+        reports = [self.report_row(), ["short"]]
+        consents = [["copy", "", False, 2]]
+        with mock.patch.object(db, "_posthog_query", side_effect=[{"results": reports}, {"results": consents}]) as q, \
+             mock.patch.object(sys, "argv", ["frame_report.py", "inbox", "30"]), \
+             mock.patch("builtins.print") as out:
+            fr.main()
+        self.assertIn("properties.contact_rev", q.call_args_list[0].args[0])
+        self.assertIn("event = 'contact_consent'", q.call_args_list[1].args[0])
+        printed = " ".join(str(c.args[0]) for c in out.call_args_list if c.args)
+        self.assertIn("follow-up permission since withdrawn", printed)
+        self.assertNotIn("me@example.com", printed)
+        with mock.patch.object(db, "_posthog_query", return_value={"results": [self.report_row(followup=False)]}) as q:
+            fr.inbox()
+        self.assertEqual(q.call_count, 1)  # nothing to reconcile, no second query
+
     def test_contacts_lists_the_newest_choice_per_copy_by_consent(self):
         rows = [["a", "both@example.com", True, "true", "2026-09-01T10:00:00Z"],
                 ["b", "news@example.com", "true", False, "2026-09-02T10:00:00Z"],
@@ -272,6 +388,22 @@ class Contact(Base):
         self.assertIs(server.POST["/api/contact"], fc.save)
         self.assertIs(server.POST["/api/contact/prompt"], fc.prompt)
 
+    def test_saving_is_not_headset_work(self):
+        """A slow send mustn't hold up switching headsets, nor be refused after a switch."""
+        import io
+        import server
+        seen = []
+        for path in ("/api/contact", "/api/contact/prompt"):
+            h = server.Handler.__new__(server.Handler)
+            body = b'{"prompt": "shown"}' if path.endswith("prompt") else b'{"email": "me@example.com", "updates": true}'
+            h.path, h.rfile = path, io.BytesIO(body)
+            h.headers = {"Content-Length": str(len(body)), "X-Frame-Device": "a-headset-switched-away-from"}
+            h.local_request = lambda: True
+            h.send_json = lambda obj, status=200: seen.append((status, server._work[0]))
+            with mock.patch.object(fc, "_send_pending", side_effect=lambda block=True: seen.append(("send", server._work[0]))):
+                h.do_POST()
+        self.assertEqual(seen, [("send", 0), (200, 0), (200, 0)])
+
 
 # Run these once, in test_telemetry, not again through the import above.
 del Base, ReportProblem

tests/test_devices.py

@@ -17,6 +17,7 @@ ROOT = Path(__file__).resolve().parent.parent
 sys.path.insert(0, str(ROOT / "ui"))
 
 import frame_devices as fd  # noqa: E402
+import frame_host  # noqa: E402
 
 CONFIG = """Host lxso1
   HostName 192.168.1.109
@@ -274,7 +275,8 @@ class Pins(Base):
     def test_hashed_and_non_default_port_entries(self):
         kh = self.ssh / "known_hosts"
         kh.write_text(f"[frame.local]:2222 {KEY}\n")
-        subprocess.run(["ssh-keygen", "-H", "-f", str(kh)], capture_output=True, check=True)
+        frame_host.run_ssh(["ssh-keygen", "-H", "-f", str(kh)], capture_output=True,
+                           stdin=subprocess.DEVNULL, check=True, timeout=10)
         self.assertFalse(fd.seed_pin("d3", ["frame.local"]))  # port 22: not that entry
         self.assertTrue(fd.seed_pin("d3", ["frame.local"], port=2222))
         self.assertIn(f"frame-control-d3 {KEY}", fd.known_hosts("d3").read_text())
@@ -283,7 +285,8 @@ class Pins(Base):
         target = fd.known_hosts("d4")
         target.parent.mkdir(parents=True, exist_ok=True)
         target.write_text(f"frame-control-d4 {KEY}\n")
-        subprocess.run(["ssh-keygen", "-H", "-f", str(target)], capture_output=True, check=True)
+        frame_host.run_ssh(["ssh-keygen", "-H", "-f", str(target)], capture_output=True,
+                           stdin=subprocess.DEVNULL, check=True, timeout=10)
         self.assertNotIn("frame-control-d4", target.read_text())
         self.assertTrue(fd.pinned("d4"))
         self.assertTrue(fd.forget_pin("d4"))

tests/test_frame_android_data.py

@@ -63,7 +63,7 @@ class ObbTests(unittest.TestCase):
                 with self.assertRaisesRegex(android.FrameError, 'start this app'):
                     data.install_obb(PKG, [path])
                 stream.assert_not_called()
-            with patch.object(subprocess, 'run', return_value=subprocess.CompletedProcess([], 1, b'', b'bad hash')):
+            with patch.object(data.frame_host, 'run_ssh', return_value=subprocess.CompletedProcess([], 1, b'', b'bad hash')):
                 with self.assertRaisesRegex(android.FrameError, 'bad hash'):
                     data._stream('command')
 

tests/test_frame_host.py

@@ -0,0 +1,87 @@
+"""Captured OpenSSH output keeps working on Windows and POSIX hosts."""
+import sandbox  # noqa: F401
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "ui"))
+import frame_host
+
+
+class CapturedSSH(unittest.TestCase):
+    def run_command(self, source, **kwargs):
+        with mock.patch.object(frame_host, "WINDOWS", True):
+            return frame_host.run_ssh([sys.executable, "-c", source], timeout=5, **kwargs)
+
+    def test_binary_output_and_input(self):
+        result = self.run_command("import sys; sys.stdout.buffer.write(sys.stdin.buffer.read()); "
+                                  "sys.stderr.buffer.write(b'error\\r\\n')",
+                                  capture_output=True, input=b"data\x00\xff")
+        self.assertEqual(result.stdout, b"data\x00\xff")
+        self.assertEqual(result.stderr, b"error\r\n")
+
+    def test_text_output_normalizes_newlines(self):
+        result = self.run_command("import sys; sys.stdout.write(sys.stdin.read()); "
+                                  "sys.stderr.buffer.write(b'first\\r\\nsecond\\rthird\\n')",
+                                  capture_output=True, input="hello\n", text=True)
+        self.assertEqual(result.stdout, "hello\n")
+        self.assertEqual(result.stderr, "first\nsecond\nthird\n")
+
+    def test_explicit_encoding_and_errors(self):
+        result = self.run_command("import sys; sys.stderr.buffer.write(b'\\xe9\\xff')",
+                                  capture_output=True, encoding="ascii", errors="replace")
+        self.assertEqual(result.stderr, "\ufffd\ufffd")
+
+    def test_check_preserves_error_output(self):
+        with self.assertRaises(subprocess.CalledProcessError) as caught:
+            self.run_command("import sys; print('out'); print('err', file=sys.stderr); sys.exit(7)",
+                             capture_output=True, text=True, check=True)
+        self.assertEqual(caught.exception.returncode, 7)
+        self.assertEqual(caught.exception.stdout, "out\n")
+        self.assertEqual(caught.exception.stderr, "err\n")
+
+    def test_timeout_preserves_partial_stderr(self):
+        with self.assertRaises(subprocess.TimeoutExpired) as caught:
+            with mock.patch.object(frame_host, "WINDOWS", True):
+                frame_host.run_ssh([sys.executable, "-c", "import sys, time; "
+                                    "sys.stderr.write('waiting'); sys.stderr.flush(); time.sleep(10)"],
+                                   capture_output=True, text=True, timeout=1)
+        self.assertEqual(caught.exception.stderr, b"waiting")
+
+    def test_streamed_stdout_is_kept_separate(self):
+        with tempfile.TemporaryFile() as output:
+            result = self.run_command("import sys; sys.stdout.buffer.write(b'file'); "
+                                      "sys.stderr.buffer.write(b'error')",
+                                      stdout=output, stderr=subprocess.PIPE)
+            output.seek(0)
+            self.assertEqual(output.read(), b"file")
+        self.assertIsNone(result.stdout)
+        self.assertEqual(result.stderr, b"error")
+
+    def test_uncaptured_windows_call_is_unchanged(self):
+        with mock.patch.object(frame_host, "WINDOWS", True), mock.patch.object(subprocess, "run") as run:
+            frame_host.run_ssh(["ssh", "-V"], stderr=subprocess.DEVNULL, timeout=5)
+        run.assert_called_once_with(["ssh", "-V"], stderr=subprocess.DEVNULL, timeout=5)
+
+    def test_posix_call_is_unchanged(self):
+        with mock.patch.object(frame_host, "WINDOWS", False), mock.patch.object(subprocess, "run") as run:
+            frame_host.run_ssh(["ssh", "-V"], capture_output=True, check=True, timeout=5)
+        run.assert_called_once_with(["ssh", "-V"], capture_output=True, check=True, timeout=5)
+
+    def test_capture_rejects_explicit_streams(self):
+        for stream in ("stdout", "stderr"):
+            with self.subTest(stream=stream), self.assertRaises(ValueError):
+                self.run_command("", capture_output=True, **{stream: subprocess.DEVNULL})
+
+    @unittest.skipUnless(shutil.which("ssh"), "needs OpenSSH")
+    def test_real_ssh_failure_returns_stderr_without_hanging(self):
+        result = frame_host.run_ssh(["ssh", "-F", os.devnull, "-o", "BatchMode=yes",
+                                    "-o", "ConnectTimeout=2", "frame-control-test.invalid", "true"],
+                                   capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=5)
+        self.assertEqual(result.returncode, 255)
+        self.assertIn("Could not resolve hostname", result.stderr)

tests/test_rdp.py

@@ -0,0 +1,161 @@
+"""Remote desktop to the Frame (frame_host.open_rdp) on each computer, with the client
+launch stubbed and a real socket standing in for the Frame's xrdp. Also the server
+staying quiet when the page goes away mid-reply, which on Windows is
+ConnectionAbortedError (WinError 10053).
+
+Run: python3 -m unittest discover -s tests
+"""
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
+import email.message
+import io
+import socket
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+ROOT = Path(__file__).resolve().parent.parent
+sys.path.insert(0, str(ROOT / "ui"))
+
+import frame_host  # noqa: E402
+import server  # noqa: E402
+
+
+def platform(name):
+    """Patches frame_host to behave as on `name` ("mac", "windows" or "linux")."""
+    return mock.patch.multiple(frame_host, MAC=name == "mac", WINDOWS=name == "windows",
+                               LINUX=name == "linux")
+
+
+class OpenRdp(unittest.TestCase):
+    def setUp(self):
+        self.xrdp = socket.socket()
+        self.xrdp.bind(("127.0.0.1", 0))
+        self.xrdp.listen(4)
+        self.addCleanup(self.xrdp.close)
+        port = mock.patch.object(frame_host, "RDP_PORT", self.xrdp.getsockname()[1])
+        port.start()
+        self.addCleanup(port.stop)
+        self.spawned = []
+        spawn = mock.patch.object(frame_host, "_spawn", self.spawned.append)
+        spawn.start()
+        self.addCleanup(spawn.stop)
+        cache = tempfile.TemporaryDirectory()
+        self.addCleanup(cache.cleanup)
+        self.cache = Path(cache.name)
+        where = mock.patch.object(frame_host, "cache_dir", lambda *p: self.cache.joinpath(*p))
+        where.start()
+        self.addCleanup(where.stop)
+
+    def test_windows_signs_in_as_steamos(self):
+        # The report: mstsc /v:HOST alone offers the Windows account, which xrdp rejects.
+        with platform("windows"):
+            message = frame_host.open_rdp("frame", "127.0.0.1")
+        self.assertEqual(len(self.spawned), 1)
+        argv = self.spawned[0]
+        self.assertEqual(argv[0], "mstsc.exe")
+        self.assertNotIn("/v:127.0.0.1", argv)
+        rdp = Path(argv[1])
+        self.assertEqual(rdp.suffix, ".rdp")
+        data = rdp.read_bytes()  # CRLF lines, as mstsc writes them, however this OS ends lines
+        self.assertNotIn(b"\r\r", data)
+        lines = data.decode("utf-8").split("\r\n")
+        self.assertIn("full address:s:127.0.0.1", lines)
+        self.assertIn("username:s:steamos", lines)
+        self.assertIn("steamos", message)
+        self.assertIn("Developer Mode password", message)
+        self.assertIn("certificate", message)
+        self.assertIn("Connect", message)
+
+    def test_nothing_listening_says_why_and_opens_nothing(self):
+        self.xrdp.close()
+        for name in ("windows", "mac", "linux"):
+            with self.subTest(name), platform(name), self.assertRaises(frame_host.Unreachable) as cm:
+                frame_host.open_rdp("frame", "127.0.0.1")
+            self.assertIn("Developer Mode", str(cm.exception))
+            self.assertIn(f"port {frame_host.RDP_PORT} refused", str(cm.exception))
+        self.assertEqual(self.spawned, [])
+
+    def test_says_which_way_it_failed(self):
+        # Only a refused port says xrdp is off; a wrong address or a silent network say so instead.
+        for error, says in ((socket.gaierror(8, "nodename nor servname provided"), "Devices tab"),
+                            (socket.timeout("timed out"), "didn't answer"),
+                            (OSError(65, "No route to host"), "didn't answer")):
+            with self.subTest(says), mock.patch.object(frame_host.socket, "create_connection", side_effect=error), \
+                    platform("windows"), self.assertRaises(frame_host.Unreachable) as cm:
+                frame_host.open_rdp("frame", "frame.local")
+            self.assertIn(says, str(cm.exception))
+            self.assertNotIn("refused", str(cm.exception))
+        self.assertEqual(self.spawned, [])
+
+    def test_server_says_it_as_the_persons_to_fix(self):
+        # A 400 with the message, not a 500 filed as an error diagnostic.
+        self.xrdp.close()
+        with mock.patch.multiple(server, LOCAL=False, LINK=None, HOST_OPTS=["-o", "HostName=127.0.0.1"]), \
+                self.assertRaises(server.Failure) as cm:
+            server.open_thing({"what": "rdp"})
+        self.assertEqual(cm.exception.status, 400)
+        self.assertIn("Developer Mode", str(cm.exception))
+
+    def test_one_file_per_address(self):
+        with platform("windows"):
+            a, b = frame_host.rdp_file("192.168.1.5"), frame_host.rdp_file("fe80::1%eth0")
+            c, d = frame_host.rdp_file("fe80::1%2"), frame_host.rdp_file("fe80::1:2")
+        self.assertEqual(len({a, b, c, d}), 4)
+        self.assertIn(b"full address:s:192.168.1.5\r\n", a.read_bytes())
+        self.assertIn(b"full address:s:fe80::1%eth0\r\n", b.read_bytes())
+
+    def test_address_cant_add_lines_to_the_file(self):
+        with platform("windows"), self.assertRaises(frame_host.HostError):
+            frame_host.rdp_file("frame\r\nusername:s:root")
+        self.assertEqual(list(self.cache.iterdir()), [])
+
+    def test_linux_clients_get_the_user(self):
+        with platform("linux"), mock.patch.object(frame_host, "which",
+                                                  lambda n, *e: "/usr/bin/xfreerdp" if n == "xfreerdp" else None):
+            message = frame_host.open_rdp("frame", "127.0.0.1")
+        self.assertEqual(self.spawned, [["xfreerdp", "/v:127.0.0.1", "/u:steamos", "/dynamic-resolution"]])
+        self.assertIn("steamos", message)
+
+
+class PageGoneAway(unittest.TestCase):
+    """The report's server log: the page closed while index.html was being sent, and the
+    server logged it as a 500, tried to answer anyway, and filed an error diagnostic."""
+
+    def handler(self, path="/"):
+        h = server.Handler.__new__(server.Handler)
+        h.command, h.path, h.request_version = "GET", path, "HTTP/1.1"
+        h.requestline, h.client_address = f"GET {path} HTTP/1.1", ("127.0.0.1", 1)
+        h.headers = email.message.Message()
+        h.headers["Host"] = "127.0.0.1:1"
+        h.wfile = mock.Mock(write=mock.Mock(side_effect=ConnectionAbortedError(10053, "aborted")))
+        h.close_connection = True
+        return h
+
+    def test_not_a_server_error(self):
+        h = self.handler()
+        with mock.patch.object(server.frame_telemetry, "diagnostic") as diagnostic, \
+                mock.patch.object(sys, "stderr", io.StringIO()), self.assertRaises(server.ClientGone):
+            h.do_GET()
+        diagnostic.assert_not_called()
+        self.assertEqual(h.wfile.write.call_count, 1)  # no second, 500 reply
+
+    def test_server_logs_nothing(self):
+        srv = server.LoopbackServer.__new__(server.LoopbackServer)
+        err = io.StringIO()
+        with mock.patch.object(sys, "stderr", err):
+            try:
+                raise server.ClientGone()
+            except server.ClientGone:
+                srv.handle_error(None, ("127.0.0.1", 1))
+            self.assertEqual(err.getvalue(), "")
+            try:
+                raise RuntimeError("real")
+            except RuntimeError:
+                srv.handle_error(None, ("127.0.0.1", 1))
+        self.assertIn("RuntimeError: real", err.getvalue())
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_telemetry.py

@@ -391,15 +391,16 @@ class ReportProblem(Base):
     def test_send_is_a_private_posthog_event_whatever_the_settings(self):
         got = self.serve()
         tm.update_settings({"usage": False})  # analytics off: a deliberate report still goes
-        res = fr.send({"kind": "idea", "title": "Live view stops", "message": "It stops after a minute.",
-                       "contact": "me@example.com", "contactFollowup": True})
+        with mock.patch.object(fr.frame_contact, "from_report", return_value=("contact-id", 1)):  # test_contact
+            res = fr.send({"kind": "idea", "title": "Live view stops", "message": "It stops after a minute.",
+                           "contact": "me@example.com", "contactFollowup": True})
         path, body = got[0]
         event = body["batch"][0]
         self.assertEqual((path, body["api_key"], event["event"]), ("/batch/", "phc_test", "problem_report"))
         props = event["properties"]
         self.assertEqual((props["kind"], props["title"], props["message"], props["contact"], props["report_id"]),
                          ("idea", "Live view stops", "It stops after a minute.", "me@example.com", res["id"]))
-        self.assertIs(props["contact_followup"], True)
+        self.assertEqual((props["contact_followup"], props["contact_id"], props["contact_rev"]), (True, "contact-id", 1))
         self.assertEqual((props["$process_person_profile"], props["$geoip_disable"]), (False, True))
         self.assertNotEqual(event["distinct_id"], tm.settings()["id"])  # not linked to the analytics
         self.assertIn(res["id"], res["message"])
@@ -422,8 +423,8 @@ class ReportProblem(Base):
 
     def test_the_inbox_skips_malformed_reports(self):
         good = ["2026-09-28T09:50:00Z", "AB12CD34", "bug", "Live view stops", "It stops.", None,
-                "0.4.0", "macOS", "", "", None]
-        rows = [["2026-09-28T10:00:00Z", "X", "bug", "Hand-made", None, None, None, None, None, None, None],
+                "0.4.0", "macOS", "", "", None, None, None]
+        rows = [["2026-09-28T10:00:00Z", "X", "bug", "Hand-made", None, None, None, None, None, None, None, None, None],
                 ["short"], good]
         with mock.patch.object(db, "_posthog_query", return_value={"results": rows}), \
              mock.patch.object(sys, "argv", ["frame_report.py", "inbox"]), \

tests/test_windows_fixes.py

@@ -0,0 +1,162 @@
+"""Windows-only paths, faked on any OS: ~/.ssh/config's ACL and link-local IPv6 zones.
+
+Run: python3 -m unittest discover -s tests
+"""
+import sandbox  # noqa: F401  (first: keeps tests off real data and services)
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+ROOT = Path(__file__).resolve().parent.parent
+sys.path.insert(0, str(ROOT / "ui"))
+
+import frame_host  # noqa: E402
+import frame_devices as fd  # noqa: E402
+
+REFUSED = ("Bad permissions. Try removing permissions for user: UNKNOWN\\UNKNOWN (S-1-5-21-1-2-3-1000) "
+           "on file C:/Users/bob/.ssh/config.\r\nBad owner or permissions on C:\\Users\\bob/.ssh/config\r\n")
+
+
+def ran(*results):
+    """subprocess.run stand-in answering whoami, then icacls."""
+    calls = []
+
+    def run(argv, **kw):
+        calls.append(argv)
+        return results[len(calls) - 1]
+    return run, calls
+
+
+class MakePrivate(unittest.TestCase):
+    def test_windows_sets_owner_only_acl_by_sid(self):
+        run, calls = ran(subprocess.CompletedProcess([], 0, '"desktop\\björn","S-1-5-21-9-8-7-1001"\r\n'.encode("cp850")),
+                         subprocess.CompletedProcess([], 0))
+        with mock.patch.object(frame_host, "WINDOWS", True), mock.patch.object(frame_host.subprocess, "run", run):
+            self.assertTrue(frame_host.make_private(Path("C:/x/config")))
+        self.assertEqual(calls[1][1:], [str(Path("C:/x/config")), "/inheritance:r", "/grant:r",
+                                        "*S-1-5-21-9-8-7-1001:F", "*S-1-5-18:F", "*S-1-5-32-544:F"])
+
+    def test_windows_falls_back_to_username_and_reports_failure(self):
+        run, calls = ran(subprocess.CompletedProcess([], 1, b""), subprocess.CompletedProcess([], 5))
+        with mock.patch.object(frame_host, "WINDOWS", True), mock.patch.object(frame_host.subprocess, "run", run), \
+                mock.patch.dict(os.environ, {"USERNAME": "bob"}):
+            self.assertFalse(frame_host.make_private(Path("config")))
+        self.assertIn("bob:F", calls[1])
+
+    @unittest.skipIf(os.name == "nt", "POSIX modes")
+    def test_posix_chmods_600(self):
+        with tempfile.NamedTemporaryFile() as f:
+            os.chmod(f.name, 0o644)
+            self.assertTrue(frame_host.make_private(f.name))
+            self.assertEqual(os.stat(f.name).st_mode & 0o777, 0o600)
+
+
+class ConfigWrites(unittest.TestCase):
+    def setUp(self):
+        self.ssh = Path(tempfile.mkdtemp(prefix="frame-acl-"))
+        self.addCleanup(shutil.rmtree, self.ssh, ignore_errors=True)
+        self.config = self.ssh / "config"
+
+    def test_devices_and_connect_writes_make_the_file_private(self):
+        import frame_connect as fc
+        self.config.write_text("Host other\n  User me\n", encoding="utf-8")
+        with mock.patch.object(frame_host, "make_private", return_value=True) as private, \
+                mock.patch.object(fc, "SSH_DIR", self.ssh), mock.patch.object(fc, "CONFIG", self.config):
+            fc.write_config("10.0.0.5")
+            self.assertTrue(fd.repair_permissions(self.config))
+            fd.rewrite_block("frame", path=self.config, user="deck")
+        self.assertEqual(private.call_count, 3)
+        self.assertIn("User deck", self.config.read_text(encoding="utf-8"))
+        self.assertTrue(all(Path(c.args[0]).parent == self.ssh for c in private.call_args_list))
+        self.assertIn("Host other", self.config.read_text(encoding="utf-8"))
+
+    def test_setup_runs_isolated_as_the_app_starts_it(self):
+        r = subprocess.run([sys.executable, "-I", "-B", str(ROOT / "ui" / "frame_connect.py"), "--help"],
+                           capture_output=True, text=True, stdin=subprocess.DEVNULL, timeout=30)
+        self.assertNotIn("ModuleNotFoundError", r.stderr)
+        self.assertIn("frame_connect.py", r.stdout + r.stderr)
+
+    def test_repair_keeps_the_bytes_and_skips_a_missing_file(self):
+        self.assertFalse(fd.repair_permissions(self.config))
+        data = "# caf\xe9 (ANSI, not UTF-8)\r\nHost a\r\n".encode("cp1252")
+        self.config.write_bytes(data)
+        with mock.patch.object(frame_host, "make_private", return_value=True):
+            self.assertTrue(fd.repair_permissions(self.config))
+        self.assertEqual(self.config.read_bytes(), data)
+
+    def test_repair_fails_without_the_acl_and_leaves_the_file(self):
+        self.config.write_bytes(b"Host a\n")
+        before = self.config.stat().st_ino
+        with mock.patch.object(frame_host, "make_private", return_value=False):
+            self.assertFalse(fd.repair_permissions(self.config))
+        self.assertEqual((self.config.read_bytes(), self.config.stat().st_ino), (b"Host a\n", before))
+        self.assertEqual(sorted(f.name for f in self.ssh.iterdir()), ["config", fd.LOCK_NAME])
+
+
+class ServerRepair(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        import server
+        cls.server = server
+
+    def setUp(self):
+        self.ssh = Path(tempfile.mkdtemp(prefix="frame-acl-"))
+        self.addCleanup(shutil.rmtree, self.ssh, ignore_errors=True)
+        (self.ssh / "config").write_text("Host a\n", encoding="utf-8")
+        patches = [mock.patch.dict(os.environ, {"FRAME_CONTROL_SSH_DIR": str(self.ssh)}),
+                   mock.patch.object(frame_host, "WINDOWS", True),
+                   mock.patch.object(self.server, "_config_repaired", False)]
+        for p in patches:
+            p.start()
+            self.addCleanup(p.stop)
+
+    def test_repairs_the_refused_config_once(self):
+        with mock.patch.object(fd, "repair_permissions", return_value=True) as repair:
+            self.assertTrue(self.server.repair_ssh_config(REFUSED))
+            self.assertFalse(self.server.repair_ssh_config(REFUSED))
+        repair.assert_called_once()
+
+    def test_leaves_other_files_and_errors_alone(self):
+        key = REFUSED.replace(".ssh/config", ".ssh/id_ed25519_frame")
+        with mock.patch.object(fd, "repair_permissions") as repair:
+            self.assertFalse(self.server.repair_ssh_config(key))
+            self.assertFalse(self.server.repair_ssh_config("ssh: connect to host frame port 22: timed out"))
+            with mock.patch.object(frame_host, "WINDOWS", False):
+                self.assertFalse(self.server.repair_ssh_config(REFUSED))
+        repair.assert_not_called()
+
+    def test_ssh_retries_after_repairing(self):
+        results = iter([subprocess.CompletedProcess([], 255, "", REFUSED), subprocess.CompletedProcess([], 0, "ok", "")])
+        with mock.patch.object(frame_host, "run_ssh", lambda *a, **k: next(results)), \
+                mock.patch.object(fd, "repair_permissions", return_value=True), \
+                mock.patch.object(self.server, "LINK", None):
+            self.assertEqual(self.server.ssh("true"), "ok")
+
+
+class LinkLocalZone(unittest.TestCase):
+    """A .local name answering on fe80::: Windows' ssh needs fe80::1%12, not %wireless_32768."""
+
+    def probe(self, windows):
+        import frame_link as fl
+        info = [(fl.socket.AF_INET6, fl.socket.SOCK_STREAM, 6, "", ("fe80::1", 22, 0, 12))]
+        sock = mock.MagicMock()
+        with mock.patch.object(frame_host, "WINDOWS", windows), \
+                mock.patch.object(fl.socket, "getaddrinfo", return_value=info), \
+                mock.patch.object(fl.socket, "socket", return_value=sock), \
+                mock.patch.object(fl.socket, "if_indextoname", return_value="wireless_32768", create=True):
+            return fl.probe("frame.local", 22)["ip"]
+
+    def test_windows_uses_the_numeric_zone(self):
+        self.assertEqual(self.probe(True), "fe80::1%12")
+
+    def test_elsewhere_uses_the_interface_name(self):
+        self.assertEqual(self.probe(False), "fe80::1%wireless_32768")
+
+
+if __name__ == "__main__":
+    unittest.main()

ui/frame_android.py

@@ -47,8 +47,8 @@ def ssh(cmd, input=None, timeout=120):
     try:
         # No inherited stdin (see server.ssh): Windows' ssh.exe would wait on it.
         feed = {'input': input} if input is not None else {'stdin': subprocess.DEVNULL}
-        p = subprocess.run(['ssh', *SSH_OPTS, FRAME, cmd], capture_output=True, **feed,
-                           timeout=timeout, text=isinstance(input, str) or input is None)
+        p = frame_host.run_ssh(['ssh', *SSH_OPTS, FRAME, cmd], capture_output=True, **feed,
+                               timeout=timeout, text=isinstance(input, str) or input is None)
     except subprocess.TimeoutExpired:
         raise FrameError(f'timed out talking to {FRAME}')
     if p.returncode != 0:
@@ -120,7 +120,7 @@ def _copy(src, dest, executable=False, timeout=600):
     else:
         cmd = ['scp', *SSH_OPTS, src, f'{FRAME}:{dest}']
     try:
-        subprocess.run(cmd, check=True, capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=timeout)
+        frame_host.run_ssh(cmd, check=True, capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=timeout)
     except subprocess.TimeoutExpired:
         raise FrameError(f'copying {name} to the Frame timed out')
     except subprocess.CalledProcessError as e:

ui/frame_android_data.py

@@ -11,16 +11,17 @@ import tempfile
 import uuid
 
 import frame_android as android
+import frame_host
 
 REMOTE = Path(android.ROOT) / 'frame/android/app-data.py'
 
 
 def _stream(command, src=None, dst=None):
     try:
-        result = subprocess.run(['ssh', *android.SSH_OPTS, android.FRAME, command],
-                                stdin=src if src else subprocess.DEVNULL,
-                                stdout=dst if dst else subprocess.PIPE,
-                                stderr=subprocess.PIPE, timeout=1800)
+        result = frame_host.run_ssh(['ssh', *android.SSH_OPTS, android.FRAME, command],
+                                    stdin=src if src else subprocess.DEVNULL,
+                                    stdout=dst if dst else subprocess.PIPE,
+                                    stderr=subprocess.PIPE, timeout=1800)
     except subprocess.TimeoutExpired:
         raise android.FrameError('app-data transfer timed out')
     except OSError as error:

ui/frame_connect.py

@@ -24,6 +24,10 @@ import urllib.error
 import urllib.request
 from pathlib import Path
 
+# The app runs this with python -I, which leaves the script's folder off sys.path.
+sys.path.insert(0, str(Path(__file__).resolve().parent))
+import frame_host  # noqa: E402
+
 FRAME_USER = os.environ.get("FRAME_USER", "steamos")
 USER_FROM_ENV = "FRAME_USER" in os.environ
 FRAME_ALIAS = os.environ.get("FRAME_ALIAS", "frame")
@@ -330,8 +334,9 @@ def _write_config(host, port, user):
     block = config_block(host, port, user)
     tmp = CONFIG.with_name(f"config.frame-control.{os.getpid()}.tmp")
     tmp.write_text("\n".join(block + kept) + "\n", encoding="utf-8")
-    if os.name != "nt":
-        tmp.chmod(0o600)
+    if not frame_host.make_private(tmp):
+        say("    couldn't make ~/.ssh/config private; if ssh says \"Bad owner or permissions\", "
+            "Frame Control repairs it when it next connects")
     # On Windows a running ssh.exe (Frame Control's own, say) keeps the config open
     # and locked, so the swap can fail for a moment; keep trying for a while.
     for attempt in range(60):
@@ -349,9 +354,9 @@ def _write_config(host, port, user):
 
 def key_login_works():
     # accept-new: trust a first-seen host key (as the copy step does); a changed one still fails.
-    return subprocess.run(["ssh", "-o", "BatchMode=yes", "-o", "ConnectTimeout=5",
-                           "-o", "StrictHostKeyChecking=accept-new", FRAME_ALIAS, "true"],
-                          capture_output=True).returncode == 0
+    return frame_host.run_ssh(["ssh", "-o", "BatchMode=yes", "-o", "ConnectTimeout=5",
+                               "-o", "StrictHostKeyChecking=accept-new", FRAME_ALIAS, "true"],
+                              capture_output=True).returncode == 0
 
 
 def configured_user():

ui/frame_contact.py

@@ -71,6 +71,31 @@ def valid_email(email):
     return len(email) <= EMAIL_MAX and bool(EMAIL_RE.fullmatch(email))
 
 
+def flag(body, key):
+    """A consent choice: true only when it really is true (not "false" or 1), left out is no."""
+    v = body.get(key)
+    if v is not None and not isinstance(v, bool):
+        raise ValueError(f'{key} must be true or false')
+    return v is True
+
+
+def from_report(email):
+    """Follow-up questions agreed to with a problem report: the address becomes the contact
+    email with that choice ticked, so it shows in Settings and is removed the same way. Update
+    notices stay on only for the same address: a different one replaces the old address with
+    follow-up questions only (the report form says so before sending). Returns (contact id,
+    rev) for the report to carry, read together with the change itself: a later change from
+    this copy has a higher rev, and the newest such change decides whether the report's
+    follow-up permission still stands, whatever the clocks say."""
+    with _lock:
+        s = load()
+        same = s['email'].lower() == email.lower()
+        changed, cid, rev = _apply({'email': s['email'] if same else email,
+                                    'updates': s['updates'] and same, 'followup': True})
+    _deliver(changed)
+    return cid, rev
+
+
 def state():
     """What the page shows. showPrompt: the one-time prompt hasn't been shown or answered yet,
     and the Frame has connected at least once (setup worked), so it never greets a new install."""
@@ -155,8 +180,14 @@ def redact_removed(event, started):
 def save(body):
     """Set, change or remove the address and the two choices. An address needs at least one
     choice ticked; an empty address (or neither ticked) removes it and withdraws both."""
+    _deliver(_apply(body)[0])
+    return state()
+
+
+def _apply(body):
+    """save()'s change, kept here and waiting to send. Returns (changed, contact id, rev)."""
     email = str(body.get('email') or '').strip()
-    updates, followup = bool(body.get('updates')), bool(body.get('followup'))
+    updates, followup = flag(body, 'updates'), flag(body, 'followup')
     if email and not valid_email(email):
         raise ValueError("that doesn't look like an email address")
     if email and not (updates or followup):
@@ -181,9 +212,12 @@ def save(body):
                 _forget_locally(old)
             except OSError:
                 pass
+        return changed, s['id'], s['rev']
+
+
+def _deliver(changed):
     if changed and not _send_pending(block=False):
         _wake.set()  # offline, or a send under way that will take this change with it
-    return state()
 
 
 def prompt(body):

ui/frame_devices.py

@@ -241,8 +241,7 @@ def _write_config(path, text, expected):
     try:
         with os.fdopen(fd_, "w", encoding="utf-8") as fh:
             fh.write(text)
-        if not frame_host.WINDOWS:
-            tmp.chmod(0o600)
+        frame_host.make_private(tmp)  # best effort: an edit still beats none (repair_permissions insists)
         for attempt in range(20):  # Windows: a running ssh.exe can hold the file for a moment
             if read_config(path) != expected:
                 return False
@@ -271,6 +270,37 @@ def _edit_config(path, change):
         raise OSError(f"{path} kept changing while Frame Control tried to update it")
 
 
+def repair_permissions(path=None):
+    """Give ~/.ssh/config make_private's ACL by swapping in a byte-for-byte copy: for a
+    file Windows' OpenSSH refuses ("Bad owner or permissions"). -> True only if the copy
+    got that ACL and replaced the file."""
+    path = Path(path or ssh_config())
+    with _config_lock, file_lock(path.with_name(LOCK_NAME)):
+        try:
+            data = path.read_bytes()
+        except OSError:
+            return False
+        fd_, tmp = tempfile.mkstemp(prefix="config.frame-control.", dir=str(path.parent))
+        tmp = Path(tmp)
+        try:
+            with os.fdopen(fd_, "wb") as fh:
+                fh.write(data)
+            if not frame_host.make_private(tmp):
+                return False
+            for attempt in range(20):  # a running ssh.exe can hold the file for a moment
+                if path.read_bytes() != data:
+                    return False
+                try:
+                    os.replace(tmp, path)
+                    return True
+                except PermissionError:
+                    time.sleep(0.25)
+            return False
+        finally:
+            if tmp.exists():
+                tmp.unlink()
+
+
 def rewrite_block(alias, path=None, hostname=None, user=None, port=None, expect=None):
     """Change HostName, User or Port inside ALIAS's managed block, leaving the rest of the
     file alone. -> True if the file changed. Does nothing if there's no such block, or
@@ -333,8 +363,8 @@ def remove_block(alias, path=None):
 def effective_port(alias, config):
     """The port ssh uses for ALIAS with this config file (`ssh -F FILE -G ALIAS`), else 22."""
     try:
-        out = subprocess.run(["ssh", "-F", str(config), "-G", alias], capture_output=True, text=True,
-                             stdin=subprocess.DEVNULL, timeout=10).stdout
+        out = frame_host.run_ssh(["ssh", "-F", str(config), "-G", alias], capture_output=True, text=True,
+                                 stdin=subprocess.DEVNULL, timeout=10).stdout
     except (OSError, subprocess.TimeoutExpired):
         return 22
     m = re.search(r"^port (\d+)$", out, re.M)
@@ -346,8 +376,8 @@ def effective_port(alias, config):
 
 def _keygen(*args):
     try:
-        return subprocess.run(["ssh-keygen", *args], capture_output=True, stdin=subprocess.DEVNULL, text=True,
-                              timeout=10)
+        return frame_host.run_ssh(["ssh-keygen", *args], capture_output=True, stdin=subprocess.DEVNULL, text=True,
+                                  timeout=10)
     except (OSError, subprocess.TimeoutExpired):
         return None
 

ui/frame_host.py

@@ -5,12 +5,16 @@ Everything here runs on your computer, not the Frame. Python stdlib only.
 CLI (used by the Electron app, so terminal handling lives in one place):
   python3 ui/frame_host.py terminal -- CMD [ARG...]   # open CMD in a terminal window
 """
+import hashlib
+import io
 import os
 import shlex
 import shutil
+import socket
 import ssl
 import subprocess
 import sys
+import tempfile
 from pathlib import Path
 
 MAC = sys.platform == "darwin"
@@ -32,6 +36,45 @@ class HostError(RuntimeError):
     pass
 
 
+class Unreachable(HostError):
+    """The Frame, or a service on it, didn't answer: the person's to sort out, not a fault here."""
+
+
+def run_ssh(argv, **kwargs):
+    """Run an OpenSSH tool without Windows' redirected-stderr pipe hang.
+
+    A real temporary file avoids OpenSSH's blocked asynchronous stderr writes,
+    while keeping subprocess.run's captured output, text, check and timeout API.
+    """
+    if not WINDOWS:
+        return subprocess.run(argv, **kwargs)
+    if kwargs.pop("capture_output", False):
+        if kwargs.get("stdout") is not None or kwargs.get("stderr") is not None:
+            raise ValueError("stdout and stderr arguments may not be used with capture_output")
+        kwargs.update(stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    if kwargs.get("stderr") != subprocess.PIPE:
+        return subprocess.run(argv, **kwargs)
+    check = kwargs.pop("check", False)
+    text = any(kwargs.get(key) for key in ("text", "universal_newlines", "encoding", "errors"))
+    with tempfile.TemporaryFile() as stderr:
+        kwargs["stderr"] = stderr
+        try:
+            result = subprocess.run(argv, **kwargs)
+        except subprocess.TimeoutExpired as error:
+            stderr.seek(0)
+            error.stderr = stderr.read()
+            raise
+        stderr.seek(0)
+        if text:
+            with io.TextIOWrapper(stderr, encoding=kwargs.get("encoding"), errors=kwargs.get("errors")) as reader:
+                result.stderr = reader.read()
+        else:
+            result.stderr = stderr.read()
+    if check:
+        result.check_returncode()
+    return result
+
+
 def data_dir(*parts):
     """Per-user app data: ~/Library/Application Support, %APPDATA% or $XDG_DATA_HOME
     (or $FRAME_CONTROL_DATA_DIR, which the tests point at a throwaway directory)."""
@@ -241,10 +284,46 @@ def clipboard_text():
     raise HostError("Can't read the clipboard")
 
 
+# What Windows' OpenSSH says when it refuses ~/.ssh/config (or a key) for its ACL.
+BAD_PERMISSIONS = "Bad owner or permissions on "
+
+
+def make_private(path):
+    """Leave only this user able to open PATH, as ssh insists for ~/.ssh/config.
+    Windows: an ACL of just this user, SYSTEM and Administrators, inherited nothing.
+    A file written into ~/.ssh otherwise takes the folder's ACL, and Windows' OpenSSH
+    refuses it if that grants anyone else, even an account deleted long ago
+    ("Bad owner or permissions"). Best effort: -> False if it couldn't."""
+    if not WINDOWS:
+        try:
+            os.chmod(path, 0o600)
+            return True
+        except OSError:
+            return False
+    me = os.environ.get("USERNAME", "")
+    try:  # "desktop\me","S-1-5-21-..."
+        # Bytes: the account name is in the console's code page, the SID is ASCII.
+        out = subprocess.run(["whoami", "/user", "/fo", "csv", "/nh"], capture_output=True,
+                             stdin=subprocess.DEVNULL, timeout=10).stdout
+        sid = out.decode("ascii", "replace").strip().rsplit(",", 1)[-1].strip('"')
+        if sid.startswith("S-1-"):
+            me = "*" + sid
+    except (OSError, subprocess.TimeoutExpired):
+        pass
+    if not me:
+        return False
+    try:
+        return subprocess.run(["icacls", str(path), "/inheritance:r", "/grant:r", f"{me}:F",
+                               "*S-1-5-18:F", "*S-1-5-32-544:F"], capture_output=True,
+                              stdin=subprocess.DEVNULL, timeout=10).returncode == 0
+    except (OSError, subprocess.TimeoutExpired):
+        return False
+
+
 def ssh_hostname(alias):
     """The real host name an ssh alias points at (`ssh -G`), for non-SSH clients like RDP."""
     try:
-        out = subprocess.run(["ssh", "-G", alias], capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=10).stdout
+        out = run_ssh(["ssh", "-G", alias], capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=10).stdout
     except (OSError, subprocess.TimeoutExpired):
         return alias
     for line in out.splitlines():
@@ -277,24 +356,65 @@ def open_steam_link():
     return "Steam Link isn't installed; opened its download page"
 
 
+RDP_PORT = 3389
+RDP_USER = "steamos"  # xrdp signs in with the Developer Mode password, not this computer's
+# xrdp's certificate is its own, so every client warns about it first.
+RDP_LOGIN = (f"accept the warning about the Frame's certificate, then sign in as {RDP_USER} "
+             "with your Developer Mode password")
+
+
+def check_rdp(host, timeout=3):
+    """Raise Unreachable, saying why, unless the Frame's RDP port takes a connection."""
+    try:
+        with socket.create_connection((host, RDP_PORT), timeout=timeout):
+            return
+    except ConnectionRefusedError:
+        raise Unreachable(f"The Frame at {host} is on but isn't accepting remote desktop (port {RDP_PORT} "
+                          "refused). Turn on Developer Mode in Steam Settings > System on the headset, "
+                          "then restart it and try again.") from None
+    except socket.gaierror:
+        raise Unreachable(f"Can't find {host} on the network for remote desktop. Check the headset's "
+                          "address on the Devices tab.") from None
+    except OSError as e:
+        raise Unreachable(f"The Frame didn't answer remote desktop at {host} ({e}). It may be asleep, "
+                          "switched off or on another network; if it's on, check Developer Mode is on "
+                          "in Steam Settings > System.") from None
+
+
+def rdp_file(host):
+    """A Remote Desktop connection file for the Frame. mstsc /v: alone offers this
+    computer's Windows account, which xrdp turns away; the file names steamos instead."""
+    if any(c in host for c in "\r\n"):
+        raise HostError("That headset address can't be used for remote desktop")
+    # One file per address, so two launches close together can't swap headsets.
+    path = cache_dir(f"frame-{hashlib.sha256(host.encode()).hexdigest()[:16]}.rdp")
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with open(path, "w", encoding="utf-8", newline="\r\n") as f:  # Path.write_text(newline=) is 3.10+
+        f.write(f"full address:s:{host}\nusername:s:{RDP_USER}\n")
+    return path
+
+
 def open_rdp(alias, host=None):
     """Remote desktop to the Frame's xrdp (user steamos), at `host` or where the alias points."""
     host = host or ssh_hostname(alias)
+    # The client would open either way and then fail on its own, with nothing said here.
+    check_rdp(host)
     if MAC:
         if subprocess.run(["open", "-a", "Windows App"], capture_output=True).returncode == 0:
-            return "Opened Windows App"
+            return f"Opened Windows App: connect to {host} and {RDP_LOGIN}"
         open_url("https://apps.apple.com/app/windows-app/id1295203466")
         return "Windows App isn't installed; opened its App Store page"
     if WINDOWS:
-        _spawn(["mstsc.exe", f"/v:{host}"])
-        return f"Opened Remote Desktop to {host}"
+        _spawn(["mstsc.exe", str(rdp_file(host))])
+        # Windows asks about the unsigned connection file first.
+        return f"Opened Remote Desktop to {host}: choose Connect, {RDP_LOGIN}"
     if which("remmina"):
-        _spawn(["remmina", "-c", f"rdp://steamos@{host}"])
-        return f"Opened Remmina to {host}"
+        _spawn(["remmina", "-c", f"rdp://{RDP_USER}@{host}"])
+        return f"Opened Remmina to {host}: {RDP_LOGIN}"
     for name in ("xfreerdp3", "xfreerdp"):
         if which(name):
-            _spawn([name, f"/v:{host}", "/u:steamos", "/dynamic-resolution"])
-            return f"Opened FreeRDP to {host}"
+            _spawn([name, f"/v:{host}", f"/u:{RDP_USER}", "/dynamic-resolution"])
+            return f"Opened FreeRDP to {host}: {RDP_LOGIN}"
     raise HostError("No RDP client found: install Remmina or FreeRDP")
 
 

ui/frame_link.py

@@ -74,8 +74,8 @@ def ssh_g(alias):
     """(hostname, port, user, proxied) from `ssh -G ALIAS`, for a headset that's only an
     ssh alias. proxied: it goes through ProxyJump or ProxyCommand, so only ssh can reach it."""
     try:
-        out = subprocess.run(["ssh", "-G", alias], capture_output=True, stdin=subprocess.DEVNULL, text=True,
-                             timeout=10).stdout
+        out = frame_host.run_ssh(["ssh", "-G", alias], capture_output=True, stdin=subprocess.DEVNULL, text=True,
+                                 timeout=10).stdout
     except (OSError, subprocess.TimeoutExpired):
         out = ""
     got = {}
@@ -108,7 +108,8 @@ def probe(host, port, timeout=PROBE_TIMEOUT, update=None):
         ip = addr[0]
         if family == socket.AF_INET6 and len(addr) > 3 and addr[3] and "%" not in ip:
             try:  # a link-local IPv6 address only works with its interface
-                ip = f"{ip}%{socket.if_indextoname(addr[3])}"
+                # Windows' ssh takes only the number: its names ("wireless_32768") don't resolve.
+                ip = f"{ip}%{addr[3] if frame_host.WINDOWS else socket.if_indextoname(addr[3])}"
             except (OSError, AttributeError):
                 pass
         left = deadline - now()
@@ -765,8 +766,8 @@ class Link:
         if not self.control:
             return False
         try:
-            return subprocess.run([*self.mux_base, *opts, "-O", "check", alias or self.alias], capture_output=True,
-                                  stdin=subprocess.DEVNULL, timeout=5).returncode == 0
+            return frame_host.run_ssh([*self.mux_base, *opts, "-O", "check", alias or self.alias], capture_output=True,
+                                      stdin=subprocess.DEVNULL, timeout=5).returncode == 0
         except (OSError, subprocess.TimeoutExpired):
             return False
 
@@ -777,8 +778,8 @@ class Link:
             pending.kill()
         if self.control and self.alias:
             try:
-                subprocess.run([*self.mux_base, *self.opts, "-O", "exit", self.alias], capture_output=True,
-                               stdin=subprocess.DEVNULL, timeout=5)
+                frame_host.run_ssh([*self.mux_base, *self.opts, "-O", "exit", self.alias], capture_output=True,
+                                   stdin=subprocess.DEVNULL, timeout=5)
             except (OSError, subprocess.TimeoutExpired):
                 pass
         if proc and proc.poll() is None:
@@ -983,8 +984,8 @@ class Link:
                     *self.host_opts(device, ssh_target(a["host"], res.get("ip"))),
                     "-o", "StrictHostKeyChecking=yes", device["alias"], "true"]
             try:
-                r = subprocess.run(argv, capture_output=True, stdin=subprocess.DEVNULL, text=True,
-                                   errors="replace", timeout=20)
+                r = frame_host.run_ssh(argv, capture_output=True, stdin=subprocess.DEVNULL, text=True,
+                                       errors="replace", timeout=20)
                 err = r.stderr.strip()
                 if r.returncode == 0:
                     rows[i].update(ssh="ok", detail=f"{lead} · SSH works")

ui/frame_report.py

@@ -112,18 +112,22 @@ def send(body):
     """Send the report to PostHog. Returns {"id", "message"}; raises ReportError."""
     kind = body.get('kind') if body.get('kind') in KINDS else 'bug'
     title, text, diag = compose(body)
-    followup = bool(body.get('contactFollowup'))
+    followup = frame_contact.flag(body, 'contactFollowup')
     contact = str(body.get('contact') or '').strip() if followup else ''
     if followup and not frame_contact.valid_email(contact):
         raise ValueError('add your email address for follow-up questions, or untick that box')
+    started = time.time()  # a removal from now on (even while saving the address) is redacted from the log
+    # It becomes the contact email in Settings, where it's changed or removed like any other.
+    contact_id, contact_rev = frame_contact.from_report(contact) if followup else ('', 0)
     ref = uuid.uuid4().hex[:8].upper()
     props = {**frame_telemetry.common(), 'kind': kind, 'title': title, 'message': text,
              'contact': contact, 'contact_followup': followup, 'diagnostics': diag,
+             # Only with an address: a later change from this copy (higher rev) can take it back.
+             'contact_id': contact_id, 'contact_rev': contact_rev,
              'report_id': ref, 'steamos': str(frame.get('build') or '')[:120], 'level': 'report'}
     # Its own random id: a report can carry contact details, so it isn't linked to this copy's analytics.
     event = {'event': 'problem_report', 'distinct_id': str(uuid.uuid4()), 'uuid': str(uuid.uuid4()),
              'timestamp': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()), 'properties': props}
-    started = time.time()
     try:
         frame_telemetry.post([event], timeout=30)
     except frame_telemetry.SendError as e:
@@ -143,15 +147,50 @@ class ReportError(RuntimeError):
 
 def inbox(days=30):
     """The maintainer's recent reports from PostHog, newest first (needs the personal API key
-    frame_compat_db.sync uses)."""
+    frame_compat_db.sync uses). Column 10 is whether the person may be asked follow-up
+    questions now: 'withdrawn' when a later choice from the same copy took it back."""
     import frame_compat_db
+    days = int(days)
     res = frame_compat_db._posthog_query(
         "SELECT timestamp, properties.report_id, properties.kind, properties.title, properties.message, "
         "properties.contact, properties.app_version, properties.os, properties.steamos, properties.diagnostics, "
-        "properties.contact_followup "
-        f"FROM events WHERE event = 'problem_report' AND timestamp > now() - INTERVAL {int(days)} DAY "
+        "properties.contact_followup, properties.contact_id, properties.contact_rev "
+        f"FROM events WHERE event = 'problem_report' AND timestamp > now() - INTERVAL {days} DAY "
         "ORDER BY timestamp DESC LIMIT 200")
-    return res.get('results') or []
+    rows = [r for r in res.get('results') or [] if isinstance(r, list) and len(r) == 13]
+    if any(r[11] and _yes(r[10]) for r in rows):
+        later = frame_compat_db._posthog_query(
+            "SELECT distinct_id, properties.email, properties.followup, ifNull(toInt(properties.rev), 0) "
+            "FROM events WHERE event = 'contact_consent' LIMIT 100000")
+        mark_withdrawn(rows, later.get('results') or [])
+    return rows
+
+
+def mark_withdrawn(reports, consents):
+    """Mark reports whose follow-up permission was taken back: the newest contact choice from
+    the same copy made after the report (a higher rev than it carries, not a later clock) no
+    longer agrees to follow-up questions at that address."""
+    newest = {}
+    for c in consents:
+        if not isinstance(c, list) or len(c) != 4:
+            continue
+        cid, email, followup, rev = c
+        try:
+            rev = int(rev or 0)
+        except (TypeError, ValueError):
+            continue
+        if rev > newest.get(str(cid), (-1,))[0]:
+            newest[str(cid)] = (rev, str(email or ''), followup)
+    for r in reports:
+        if not (r[11] and _yes(r[10])):
+            continue
+        try:
+            sent_at = int(r[12] or 0)
+        except (TypeError, ValueError):
+            sent_at = 0
+        rev, email, followup = newest.get(str(r[11]), (-1, '', None))
+        if rev > sent_at and not (_yes(followup) and email.strip().lower() == str(r[5] or '').strip().lower()):
+            r[10] = 'withdrawn'
 
 
 def _yes(v):
@@ -204,14 +243,13 @@ def main():
     if cmd != 'inbox':
         sys.exit(USAGE)
     for row in inbox(*(args[:1] or [30])):
-        if not isinstance(row, list) or len(row) != 11:
-            continue
         ts, ref, kind, title, text, contact, version, osname, steamos, diag = (str(v or '') for v in row[:10])
         # Reports from before contact_followup existed only carried an address given for a reply.
         reply = contact and (row[10] is None or _yes(row[10]))
         print(f"== {ts[:16].replace('T', ' ')}  {ref}  [{kind}] {title}")
         print(f"   {version} on {osname}, SteamOS {steamos or 'unknown'}"
-              f"{', may follow up at ' + contact if reply else ''}")
+              f"{', may follow up at ' + contact if reply else ''}"
+              f"{', follow-up permission since withdrawn' if row[10] == 'withdrawn' else ''}")
         print('   ' + text.replace('\n', '\n   '))
         if diag:
             print('   --- diagnostics\n   ' + diag.replace('\n', '\n   '))

ui/index.html

@@ -1268,8 +1268,9 @@
     <label class="field">What happened?<textarea id="bugText" maxlength="5000" required minlength="10"
       placeholder="What you did, what happened, and what you expected."></textarea></label>
     <label class="popt"><input type="checkbox" id="bugFollowup"><b>The maintainer may contact me with follow-up questions</b>
-      <span class="sub">Optional. Your email address goes with this report only when this is ticked.</span></label>
+      <span class="sub">Optional. Your email address goes with this report only when this is ticked, and is kept as your contact email in Privacy &amp; updates, where you can remove it.</span></label>
     <label class="field">Your email address<input type="email" id="bugContact" maxlength="254" placeholder="you@example.com" disabled></label>
+    <p class="hint" id="bugReplaces" role="status" hidden></p>
     <label class="popt"><input type="checkbox" id="bugDiag" checked><b>Include diagnostics</b>
       <span class="sub">Frame Control's version, your OS and the Frame's SteamOS build.</span></label>
     <label class="popt"><input type="checkbox" id="bugLogs"><b>Also include recent activity and the server log</b>
@@ -4131,6 +4132,7 @@ async function offerTest(m) {
 
 // ---- privacy: anonymous analytics levels (ui/frame_telemetry.py, docs/privacy.md) ----
 const telemetry = { usage: false, compat: false, blocked: "not loaded" };
+let privacyNoticeShown = false;  // this visit: then the contact prompt waits for another one
 function renderTelemetry(s) {
   Object.assign(telemetry, s);
   setRepHint();
@@ -4141,6 +4143,7 @@ function renderTelemetry(s) {
                                          : "Nothing sent yet.";
   const showNotice = !s.blocked && !s.noticeShown && s.usage;
   $("privacyNotice").hidden = !showNotice;
+  if (showNotice) privacyNoticeShown = true;
   if (showNotice) api("/api/telemetry", { noticeShown: true }).catch(() => {});
 }
 async function loadTelemetry() {
@@ -4183,13 +4186,14 @@ async function loadContact() {
   try { renderContact(await api("/api/contact")); } catch { return; }
   checkContactPrompt();
 }
-// One time only, only once the Frame has connected, and never on top of the privacy notice or
-// straight after it (two asks in a row is nagging): checked at load and whenever the Frame connects.
+// One time only, only once the Frame has connected, and never in a visit that showed the privacy
+// notice (two asks in a row is nagging): checked at load and whenever the Frame connects.
 async function checkContactPrompt() {
-  if (!$("contactNotice").hidden || !$("privacyNotice").hidden) return;
+  await telemetryLoaded;
+  if (privacyNoticeShown || !$("contactNotice").hidden) return;
   let s;
   try { s = await api("/api/contact"); } catch { return; }
-  if (!s.showPrompt || !$("contactNotice").hidden || !$("privacyNotice").hidden) return;
+  if (!s.showPrompt || privacyNoticeShown || !$("contactNotice").hidden) return;
   $("contactNotice").hidden = false;
   api("/api/contact/prompt", { prompt: "shown" }).catch(() => {});
 }
@@ -4257,6 +4261,7 @@ function openBugReport() {
   // A standing yes to follow-up questions (Privacy & updates) fills this in; it can be unticked.
   $("bugFollowup").checked = contact.followup; $("bugContact").value = contact.followup ? contact.email : "";
   $("bugContact").disabled = !contact.followup; $("bugContact").required = contact.followup;
+  bugReplaces();
   $("bugDlg").showModal();
   loadBugPreview();
 }
@@ -4267,7 +4272,17 @@ $("bugFollowup").onchange = () => {
   const on = $("bugFollowup").checked;
   $("bugContact").disabled = !on; $("bugContact").required = on;
   if (on && !$("bugContact").value) { $("bugContact").value = contact.email; $("bugContact").focus(); }
+  bugReplaces();
 };
+// Sending with another address replaces the saved one (ui/frame_contact.py from_report): say so first.
+function bugReplaces() {
+  const email = $("bugContact").value.trim(), old = contact.email;
+  const replaces = $("bugFollowup").checked && email && old && email.toLowerCase() !== old.toLowerCase();
+  $("bugReplaces").hidden = !replaces;
+  $("bugReplaces").textContent = !replaces ? "" : `Sending replaces ${old} as your contact email${contact.updates
+    ? ", and update notices stop until you turn them on again in Privacy & updates" : ""}.`;
+}
+$("bugContact").oninput = bugReplaces;
 $("bugCancel").onclick = () => $("bugDlg").close();
 $("bugCopy").onclick = async () => {
   const { title, body } = bugReportText();
@@ -4290,6 +4305,7 @@ $("bugForm").onsubmit = async e => {
     $("bugMsg").textContent = `Couldn't send it: ${err.message}. Try again later, or use Copy report.`;
     $("bugSend").disabled = false;
   }
+  api("/api/contact").then(renderContact).catch(() => {});  // the report may have saved the address
 };
 if (window.frameApp && window.frameApp.onReportProblem) window.frameApp.onReportProblem(openBugReport);
 

ui/server.py

@@ -134,6 +134,7 @@ LINK = None  # the connector (frame_link.Link); None on the Frame itself
 # install's clean-up) to the other headset.
 _work_lock = threading.Lock()
 _work = [0]
+NOT_HEADSET_WORK = {"/api/devices", "/api/contact", "/api/contact/prompt"}
 
 
 @contextlib.contextmanager
@@ -333,12 +334,14 @@ def ssh(remote, *, stdin=None, timeout=30, text=True):
         # Never let ssh inherit our stdin: under the app it's the pipe held open for
         # --exit-on-eof, and Windows' ssh.exe waits on it forever.
         feed = {"input": stdin} if stdin is not None else {"stdin": subprocess.DEVNULL}
-        r = subprocess.run([*SSH, FRAME, remote], capture_output=True, **feed,
-                           text=text, errors="replace" if text else None, timeout=timeout)
+        r = frame_host.run_ssh([*SSH, FRAME, remote], capture_output=True, **feed,
+                               text=text, errors="replace" if text else None, timeout=timeout)
     except subprocess.TimeoutExpired:
         raise Failure(f"Timed out talking to {FRAME}")
     if r.returncode != 0:
         err = (r.stderr or r.stdout) if text else (r.stderr or r.stdout).decode(errors="replace")
+        if r.returncode == 255 and repair_ssh_config(err):
+            return ssh(remote, stdin=stdin, timeout=timeout, text=text)
         if r.returncode == 255 and LINK and unreachable(err):
             LINK.lost(err, route_gen)  # ssh itself failed: the connector reconnects
         failure = Failure(strip_ansi(err).strip() or f"ssh exited {r.returncode}")
@@ -347,6 +350,30 @@ def ssh(remote, *, stdin=None, timeout=30, text=True):
     return r.stdout
 
 
+_config_repaired = False
+
+
+def repair_ssh_config(err):
+    """Windows' OpenSSH refused ~/.ssh/config for its ACL: give the file a private one,
+    once per run. -> True if it did, so the command is worth retrying."""
+    global _config_repaired
+    if _config_repaired or not frame_host.WINDOWS or frame_host.BAD_PERMISSIONS not in err:
+        return False
+    # ssh doubles the backslashes: "C:\\Users\\me/.ssh/config"
+    named = re.sub(r"[\\/]+", "/", err.split(frame_host.BAD_PERMISSIONS, 1)[1].splitlines()[0].strip())
+    config = frame_devices.ssh_config()
+    if not named.lower().endswith("/" + config.name.lower()):
+        return False  # a key or another file: not ours to rewrite
+    _config_repaired = True
+    try:
+        if frame_devices.repair_permissions(config):
+            print(f"Gave {config} a private ACL: ssh refused it ({named})", file=sys.stderr)
+            return True
+    except OSError as e:
+        print(f"Couldn't repair {config}'s permissions: {e}", file=sys.stderr)
+    return False
+
+
 def strip_ansi(s):
     return re.sub(r"\x1b\[[0-9;?]*[A-Za-z]|\r", "", s)
 
@@ -504,8 +531,8 @@ def save_shots(body):
         incoming = Path(tempfile.mkdtemp(prefix=".incoming-", dir=SHOTS_DIR))
         try:
             try:
-                r = subprocess.run(["scp", "-p", *SSH[1:], *(f"{FRAME}:{p}" for p in todo), str(incoming)],
-                                   capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=300)
+                r = frame_host.run_ssh(["scp", "-p", *SSH[1:], *(f"{FRAME}:{p}" for p in todo), str(incoming)],
+                                       capture_output=True, stdin=subprocess.DEVNULL, text=True, timeout=300)
             except subprocess.TimeoutExpired:
                 raise Failure("Copying screenshots timed out")
             if r.returncode != 0:
@@ -1199,6 +1226,8 @@ def open_thing(body):
                 raise Failure("That screenshot isn't saved on this computer yet", 404)
             frame_host.reveal_path(saved)
             return {"message": f"Showed {saved.name} in {frame_host.FILE_MANAGER}"}
+    except frame_host.Unreachable as e:
+        raise Failure(str(e), 400)  # theirs to turn on; nothing failed here
     except frame_host.HostError as e:
         raise Failure(str(e), 500)
     raise Failure("unknown target", 400)
@@ -2254,7 +2283,7 @@ def push_file(path, dest="Downloads/"):
         else:
             # Modern scp uses SFTP, so the remote path isn't parsed by a shell.
             cmd = ["scp", *SSH[1:], "-r", str(path), f"{FRAME}:{dest}"]
-        r = subprocess.run(cmd, capture_output=True, stdin=subprocess.DEVNULL, text=True, errors="replace", timeout=3600)
+        r = frame_host.run_ssh(cmd, capture_output=True, stdin=subprocess.DEVNULL, text=True, errors="replace", timeout=3600)
     except subprocess.TimeoutExpired:
         raise Failure(f"Copying {name} timed out")
     if r.returncode != 0:
@@ -2262,6 +2291,11 @@ def push_file(path, dest="Downloads/"):
     return f"Sent {name} to ~/{dest}"
 
 
+class ClientGone(Exception):
+    """The page went away (a reload, the app quitting) before its reply was written:
+    nobody to answer, and nothing went wrong here."""
+
+
 class Handler(BaseHTTPRequestHandler):
     server_version = "FrameControl/1"
     timeout = 60  # per socket operation, so a stalled client can't hold a thread
@@ -2294,8 +2328,11 @@ class Handler(BaseHTTPRequestHandler):
         # Nobody may frame the UI (clickjacking).
         self.send_header("X-Frame-Options", "DENY")
         self.send_header("Content-Security-Policy", "frame-ancestors 'none'")
-        self.end_headers()
-        self.wfile.write(data)
+        try:
+            self.end_headers()
+            self.wfile.write(data)
+        except ConnectionError as e:  # Windows says ConnectionAbortedError, others BrokenPipeError
+            raise ClientGone() from e
 
     def send_json(self, obj, status=200):
         self.send_bytes(json.dumps(obj).encode(), "application/json", status)
@@ -2338,6 +2375,8 @@ class Handler(BaseHTTPRequestHandler):
                 from apk_sources import _images
                 try:
                     self.send_bytes(*_images.image(path.rsplit("/", 1)[-1]))
+                except ClientGone:
+                    raise
                 except Exception:
                     self.send_json({"error": "Artwork unavailable"}, 404)
             elif path == "/api/sources/details":
@@ -2415,6 +2454,8 @@ class Handler(BaseHTTPRequestHandler):
                                 headers=[("X-Capture-Source", "gamescope")])
             else:
                 self.send_json({"error": "not found"}, 404)
+        except ClientGone:
+            raise
         except Failure as e:
             self.send_error_json(str(e), e.status, e.apk)
         except ValueError as e:
@@ -2446,9 +2487,12 @@ class Handler(BaseHTTPRequestHandler):
             body = json.loads(self.rfile.read(length) or b"{}")
             if not isinstance(body, dict):
                 raise Failure("request body must be a JSON object", 400)
-            with (contextlib.nullcontext() if path == "/api/devices" else working(meant)):
+            # Not headset work: switching headsets mustn't wait for (or refuse) these.
+            with (contextlib.nullcontext() if path in NOT_HEADSET_WORK else working(meant)):
                 result = handler(body)
             self.send_json(result)
+        except ClientGone:
+            raise
         except Failure as e:
             if e.status >= 500:
                 frame_telemetry.diagnostic(f"POST {path} {action_of(body)}", e)
@@ -2624,6 +2668,10 @@ class LoopbackServer(ThreadingHTTPServer):
         socketserver.TCPServer.server_bind(self)
         self.server_name, self.server_port = "127.0.0.1", self.server_address[1]
 
+    def handle_error(self, request, client_address):
+        if not isinstance(sys.exc_info()[1], ClientGone):
+            super().handle_error(request, client_address)
+
 
 _ONE_SERVER = None