`pardes --wait FILE` with $PARDES_9P set but no pane of its own (an agent's or a script's EDITOR) asks that session and waits there, not a screen of its own

Forwarding asked for $PARDES_PID and $PARDES_PANE, which only a pane's
shell has, so a client that talks to a session from outside its panes
got a full editor drawn in its terminal. With --wait and $PARDES_9P
alone, the file is looked at through the session's root look and the
wait is for that pane's del.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 16 insertions, 0 deletions

diff --git a/test/fs.py b/test/fs.py
index 270ac367..11233e80 100644
--- a/test/fs.py
+++ b/test/fs.py
@@ -1397,6 +1397,22 @@ def test(binary, quic=False):
             assert time.monotonic() - deleted < .05, time.monotonic() - deleted
             assert second.wait(timeout=5) == 0
             assert edited.read_bytes() == b'edited\n'
+            # --wait from outside the session's panes, $PARDES_9P alone (an
+            # agent's EDITOR): asked of the session, not a screen of its own.
+            outside_env = {k: v for k, v in env.items() if k not in ('PARDES_PANE', 'PARDES_PID')}
+            far = root / 'wait far.txt'
+            far.write_bytes(b'far\n')
+            before = serials()
+            waiting = subprocess.Popen([binary, '--wait', str(far)], cwd=root, env=outside_env,
+                                       stdin=subprocess.DEVNULL, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE)
+            deadline = time.monotonic() + 5
+            while not serials() - before and time.monotonic() < deadline:
+                time.sleep(.01)
+            far_pane, = serials() - before
+            time.sleep(.3)
+            assert waiting.poll() is None, waiting.stderr.read()
+            client.remove(f'/pane/{far_pane}')
+            assert waiting.wait(timeout=5) == 0
             # `--` ends the options: a name starting with a dash is a name.
             dash = root / '-dash.txt'
             dash.write_bytes(b'dash\n')