From fdc6a6b10a216af505f134cd7982bb83f228f124 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <m@mitchellh.com>
Date: Fri, 23 Jan 2026 13:39:32 -0800
Subject: [PATCH] terminal/osc: semantic prompt 'B'

---
 src/terminal/osc/parsers/semantic_prompt2.zig | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/src/terminal/osc/parsers/semantic_prompt2.zig b/src/terminal/osc/parsers/semantic_prompt2.zig
index 890fe714b..d2547abe4 100644
--- a/src/terminal/osc/parsers/semantic_prompt2.zig
+++ b/src/terminal/osc/parsers/semantic_prompt2.zig
@@ -10,6 +10,7 @@ pub const Command = union(enum) {
     fresh_line_new_prompt: Options,
     new_command: Options,
     prompt_start: Options,
+    end_prompt_start_input: Options,
 };
 
 pub const Options = struct {
@@ -100,6 +101,14 @@ pub fn parse(parser: *Parser, _: ?u8) ?*OSCCommand {
                 parser.command.semantic_prompt.fresh_line_new_prompt.parse(&it);
             },
 
+            'B' => end_prompt: {
+                parser.command = .{ .semantic_prompt = .{ .end_prompt_start_input = .init } };
+                if (data.len == 1) break :end_prompt;
+                if (data[1] != ';') break :valid;
+                var it = KVIterator.init(writer) catch break :valid;
+                parser.command.semantic_prompt.end_prompt_start_input.parse(&it);
+            },
+
             'L' => {
                 if (data.len > 1) break :valid;
                 parser.command = .{ .semantic_prompt = .fresh_line };
@@ -526,3 +535,38 @@ test "OSC 133: new_command extra contents" {
     for (input) |ch| p.next(ch);
     try testing.expect(p.end(null) == null);
 }
+
+test "OSC 133: end_prompt_start_input" {
+    const testing = std.testing;
+
+    var p: Parser = .init(null);
+
+    const input = "133;B";
+    for (input) |ch| p.next(ch);
+
+    const cmd = p.end(null).?.*;
+    try testing.expect(cmd == .semantic_prompt);
+    try testing.expect(cmd.semantic_prompt == .end_prompt_start_input);
+}
+
+test "OSC 133: end_prompt_start_input extra contents" {
+    const testing = std.testing;
+
+    var p: Parser = .init(null);
+    const input = "133;Bextra";
+    for (input) |ch| p.next(ch);
+    try testing.expect(p.end(null) == null);
+}
+
+test "OSC 133: end_prompt_start_input with options" {
+    const testing = std.testing;
+
+    var p: Parser = .init(null);
+    const input = "133;B;aid=foo";
+    for (input) |ch| p.next(ch);
+
+    const cmd = p.end(null).?.*;
+    try testing.expect(cmd == .semantic_prompt);
+    try testing.expect(cmd.semantic_prompt == .end_prompt_start_input);
+    try testing.expectEqualStrings("foo", cmd.semantic_prompt.end_prompt_start_input.aid.?);
+}