T23: the shell tests type a line only once the line editor reads raw keys: on CI's pwsh 7.6.6 the probe, typed right after the first folder report, came before PSReadLine's first read and was echoed, never run; shot warns when the app it runs under lacks Screen Recording, which left this Mac's pictures with the window's ground alone; AGENTS.md records the CI runners, the build without debuginfo and the typing rule

src/term/unix.rs

@@ -44,6 +44,12 @@ impl Pty {
     pub fn id(&self) -> u32 {
         self.child.id()
     }
+
+    /// A copy of the master, for tests to read its modes.
+    #[cfg(test)]
+    pub fn master(&self) -> io::Result<File> {
+        self.file.try_clone()
+    }
 }
 
 /// Starts `program`, or the login shell, in `cwd` on a new pty of `size`.