fix(perf): eliminate redundant terminal wake work (#2962)

* fix(perf): eliminate redundant terminal wake work

* fix(perf): harden release benchmark gate

* test(perf): strengthen performance guardrails

1 files changed, 37 insertions, 0 deletions

diff --git a/vendor/libghostty-vt.patches.md b/vendor/libghostty-vt.patches.md
index 04305960..dff98533 100644
--- a/vendor/libghostty-vt.patches.md
+++ b/vendor/libghostty-vt.patches.md
@@ -38,3 +38,40 @@ cargo nextest run --locked grapheme_cluster_mode_is_default_and_survives_full_re
 cargo nextest run --locked grapheme_cluster_mode_renders_flag_emoji_in_single_wide_cell
 cargo nextest run --locked grapheme_cluster_mode_renders_zwj_family_in_single_wide_cell
 ```
+
+## 0002 expose modifyOtherKeys mode through terminal data
+
+status: active
+
+patch: `vendor/patches/libghostty-vt/0002-expose-modify-other-keys-mode.patch`
+
+herdr issue: none; fixes the performance regression exposed by
+https://github.com/herdrdev/herdr/pull/2303
+
+upstream discussion: not opened
+
+upstream pr: not opened
+
+vendored base: `c5a21edfcbc2d5b46540ad91b7980aca31f5f1f3`
+
+local files:
+
+- `vendor/libghostty-vt/include/ghostty/vt/terminal.h`
+- `vendor/libghostty-vt/src/terminal/c/terminal.zig`
+
+reason: Herdr must know whether xterm modifyOtherKeys mode 2 is active to
+request printable key releases from the outer terminal. The formatter API can
+recover this fact only by formatting the active screen and scrollback. A typed
+terminal-data query exposes the authoritative scalar without formatting or
+allocation.
+
+remove when: the vendored source exposes an equivalent scalar query for
+modifyOtherKeys mode 2 and Herdr can use it without this patch.
+
+verification:
+
+```sh
+cargo nextest run --locked modify_other_keys_query_tracks_mode_two
+cargo nextest run --locked host_report_all_supplies_printable_releases_for_event_type_only_panes
+python3 -m unittest scripts.test_vendor_libghostty_vt scripts.test_ui_hot_path_architecture
+```