A new terminal's greeting `ls` goes at its shell's first prompt or never

The greeting waited for any moment the cursor sat at a prompt's input, so
where the first prompt was missed (a resize still pending, a line written
before it), `ls` was typed later into whatever ran then. It is now sent
only while nothing has run (pardes's marks saw no command start) and
nothing is typed at the prompt; past that it is dropped, never typed late.
A prompt drawn again for a resize is still the first.

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

1 files changed, 26 insertions, 2 deletions

diff --git a/test/panes.zig b/test/panes.zig
index 1ca33053..c1ae1666 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -3466,14 +3466,14 @@ const TerminalTests = struct {
             .write => return error.GreetedBeforePrompt,
             else => {},
         };
-        p.update(.{ .output = .{ .pane = 0, .bytes = "\x1b]133;A\x07prompt$ " } });
+        p.update(.{ .output = .{ .pane = 0, .bytes = "\x1b]133;A;aid=pardes\x07prompt$ " } });
         try std.testing.expect(!promptInputReady(pane));
         while (p.nextEffect()) |effect| switch (effect) {
             .write => return error.GreetedDuringPrompt,
             else => {},
         };
 
-        p.update(.{ .output = .{ .pane = 0, .bytes = "\x1b]133;B\x07" } });
+        p.update(.{ .output = .{ .pane = 0, .bytes = "\x1b]133;B;aid=pardes\x07" } });
         try std.testing.expect(promptInputReady(pane));
         var greeted = false;
         while (p.nextEffect()) |effect| switch (effect) {
@@ -3484,6 +3484,30 @@ const TerminalTests = struct {
         try std.testing.expect(!pane.greet);
     }
 
+    test "the greeting is dropped, never typed later, once something ran or was typed first" {
+        if (pardes.platform == .web) return;
+        for ([_][]const u8{
+            // A command ran before the first prompt was seen at rest.
+            "\x1b]133;A;aid=pardes\x07$ \x1b]133;B;aid=pardes\x07\x1b]133;C;aid=pardes\x07out\r\n\x1b]133;D;0;aid=pardes\x07\x1b]133;A;aid=pardes\x07$ \x1b]133;B;aid=pardes\x07",
+            // Someone typed at the first prompt.
+            "\x1b]133;A;aid=pardes\x07$ \x1b]133;B;aid=pardes\x07vim",
+        }) |output| {
+            const p = try Pardes.init(std.testing.allocator, .{ .cols = 80, .rows = 24 });
+            defer p.deinit();
+            const pane = p.panes[0].?;
+            while (p.nextEffect()) |_| {}
+            p.update(.{ .resize = .{ .cols = 80, .rows = 24 } });
+            p.update(.{ .output = .{ .pane = 0, .bytes = output } });
+            // and a later, quiet prompt changes nothing
+            p.update(.{ .output = .{ .pane = 0, .bytes = "\r\n\x1b]133;A;aid=pardes\x07$ \x1b]133;B;aid=pardes\x07" } });
+            while (p.nextEffect()) |effect| switch (effect) {
+                .write => |write| if (std.mem.eql(u8, write.bytes.slice(), "ls\r")) return error.GreetedLate,
+                else => {},
+            };
+            try std.testing.expect(!pane.greet);
+        }
+    }
+
     test "fresh-shell commands preserve order and wait for OSC 133 B" {
         if (pardes.platform == .web) return;
         const p = try Pardes.init(std.testing.allocator, .{ .tty_only = true });