All notable changes to the Ghostty Windows fork. Each release line includes the underlying upstream commit when known.

Upstream sync (1,248 commits from ghostty-org/ghostty main, through 20abdb50a) plus new Win32 actions and a stability pass focused on GPU, thread, and sleep/resume failure modes.

• Files copied in Explorer can be pasted into the terminal as space-separated, quoted paths. File drops and clipboard paste share the same hardened path conversion.
• Win32 support for editing the configuration, exporting terminal I/O, setting surface/tab/window title overrides, moving tabs, and moving live tab trees into new windows.
• Automatic WGL context recovery after a GPU driver reset, driver update, or context loss during sleep/resume. Terminal and background images are re-uploaded from CPU-side state after recovery.
• Windows virtual-memory discard support for upstream scrollback compression, allowing inactive pages to release physical memory.

• The shared core now follows upstream through 20abdb50a and requires Zig 0.16.0 for development and release builds.
• Clipboard completion uses the upstream MIME-aware API, including support for the new clipboard and terminal snapshot modes.
• Portable packaging now fails fast on missing resources, stages files within the repository, and verifies the bundled resource sentinel.

• Renderer, terminal I/O, and search mailbox writes are bounded so a wedged GPU call cannot freeze every Ghostty window. Closing a wedged surface also uses bounded joins and preserves state still reachable by detached threads.
• Windows read threads exit cleanly on broken pipes and other ConPTY shutdown errors instead of reaching undefined behavior in release builds.
• Surfaces repaint after system resume, and renderer occlusion updates are deduplicated so resize activity cannot fill the renderer mailbox.
• Toggling from transparent to opaque repaints immediately instead of waiting for a later focus or expose event.
• The Win32 integration harness only cleans up its dedicated ghostty-test executable and validates owned window handles, preventing tests from closing a developer's running Ghostty session.

Upstream sync (264 commits from ghostty-org/ghostty main, through e1d31deaa) plus a macOS-parity feature batch driven by a full audit of the Windows apprt against the macOS app, hardened by an adversarial review pass.

• CJK IME input works again. The message loop's TranslateMessage skip (a dead-key fix) also swallowed VK_PROCESSKEY, so the IME never received its keys and Chinese/Japanese/Korean composition never started. IME-claimed keys are now exempt from the skip.
• Clipboard security guards were silently bypassed. Paste-protection and OSC 52 read/write authorization now actually prompt: clipboardRequest completes with confirmed=false first and shows a confirmation dialog on UnsafePaste/UnauthorizedPaste; setClipboard honors the confirm flag. The dialog no longer holds the system clipboard open, and the surface is re-resolved by id after the modal loop (a child exiting mid-dialog could otherwise use freed memory).
• AltGr layouts (German @, [, …) no longer encode as C0/CSIu control sequences: the synthesized Ctrl+Alt is stripped from the encoded mods when AltGr produced printable text.
• Whole-window close (title-bar X, Alt+F4, close_window) now shows one aggregate confirmation when any tab still has a running process.
• window-position-x/y is honored only when both are set (a partial config previously created the window off-screen).
• libghostty-vt: selection gesture click-repeat timing was broken on Windows (raw nanoseconds stored as QPC ticks); double/triple-click detection via the C API now works. Regression test added.
• Right-click context menu no longer leaves the core's right-button state stuck pressed; minimized windows actually stop rendering; IME preedit is cleared on focus loss and survives commit+recompose messages; search-bar DPI changes no longer leave a deleted font on the match-count label.

• Inline IME preedit: the composition renders underlined at the cursor (the default floating composition box is suppressed); candidate window follows the cursor.
• Taskbar progress for OSC 9;4 progress reports via ITaskbarList3 (remove/set/error/indeterminate/pause, gated on progress-style).
• Surface right-click context menu (Copy / Paste / Select All / Split Right / Split Down / Reset Terminal).
• Command-finished notifications honoring notify-on-command-finish, -after, and -action (bell and/or desktop notification with duration and exit code).
• Search bar match counter ("3/17") driven by search_total / search_selected.
• Desktop notifications are click-to-focus: clicking the balloon raises and focuses the originating tab.
• window-theme honored for the title bar (dark / light / system / auto), with the caption tint reserved for the luminance-derived themes.
• Global hotkeys generalized to every global:-flagged keybind, re-registered on config reload.
• background-blur: acrylic-style DWM blur behind translucent windows.
• Resize overlay (columns × rows) honoring resize-overlay, -position, and -duration.
• Hovered-URL preview bubble at the bottom-left of the surface.
• User-defined command-palette-entry commands in the command palette.
• X1/X2 (back/forward) mouse buttons delivered to the terminal.
• window-decoration = none creates a borderless (still resizable) window.
• Renderer occlusion wired to tab switches, split zoom, and window minimize/restore — hidden surfaces stop rebuilding frames.
• A warning notification when the renderer reports an unhealthy state.

Upstream sync (63 commits from ghostty-org/ghostty main, through e90b7c9fa) plus a batch of Win32 input/UX fixes that surfaced during parity testing against the macOS app.

• Themed scrollbar replaces the native white WS_VSCROLL. Painted in the terminal's foreground/background colors via a layered popup overlay (UpdateLayeredWindow with per-pixel alpha) composited above the OpenGL surface. Honors the OS "Always show scrollbars" accessibility setting: overlay (auto-hide on idle) by default, always-visible when the OS prefers it; mode switches live without a Ghostty restart. Mouse drag, hover, and page-click work; clicks fall through to the terminal when the scrollbar is hidden.

• Alt-modified keybindings (Alt+-, Alt+\, Alt+letter, …) no longer ring the system bell on press. TranslateMessage synthesizes a WM_SYSCHAR after every WM_SYSKEYDOWN with a printable character, and forwarding WM_SYSCHAR to DefWindowProc was treating it as an unmatched menu accelerator and triggering MessageBeep. The keystroke itself is dispatched in WM_SYSKEYDOWN, so the new WM_SYSCHAR handler simply consumes the message.
• JIS keyboard layout no longer drifts to a US-like mapping inside applications that use Win32 Input Mode (notably Claude Code's prompt via ConPTY): @ becoming `, [ becoming ], ] becoming \, etc. The trigger was ToUnicode returning -1 for a dead key and ghostty leaving the buffered dead character in the kernel's per-thread keyboard state. Subsequent ToUnicode calls then composed against that residue, producing wrong characters until ghostty exited — the damage even survived a claude -c restart because the state lives in ghostty's process, not Claude's. The fix drains the dead-key state after detecting it (mirroring wezterm's KeyboardLayoutInfo::clear_key_state) and surfaces the dead character itself as the Uc field so the application still sees the keystroke. Both ToUnicode call sites now also skip modifier-only VKs (Shift, Ctrl, Alt, Win, lock keys), which never produce a character on their own and are another way to perturb the per-thread state.
• Ghostty no longer freezes after extended use under heavy ConPTY output (notably while a long Claude Code task streamed through the terminal). The UI thread was deadlocking inside oleacc!CAccessible::QueryInterface -> SleepConditionVariableSRW: every cross-pane focus transition caused oleacc to destroy the outgoing surface's MSAA AccWrap synchronously inside DefWindowProc, the destructor re-entered our WindowProc via SetFocus -> user32!ImeSystemHandler -> oleacc!CreateClient, and the resulting COM marshaling waited for a reply that the same UI thread needed to pump. Each split being its own WS_CHILD HWND (vs. wezterm/rio's single-HWND model) is what wedged the round-trip. Both surfaceWndProc and windowWndProc now return 0 from WM_GETOBJECT for OBJID_CLIENT, opting out of the default oleacc proxy entirely. We don't expose terminal-cell-level accessibility today, so the only thing this disables is the generic window-frame proxy a screen reader would otherwise see; once a proper IAccessible / UI Automation provider lands, it can be returned here via LresultFromObject instead.
• Dead-key composition now works correctly on pt-BR ABNT2 and other layouts with dead keys (~+a → ã, ´+e → é, ^+o → ô). The root cause was TranslateMessage being called before DispatchMessage for terminal surface windows: its internal ToUnicodeEx mutated the thread's per-queue dead-key state before handleKeyEvent's own ToUnicode call, so dead keys composed with themselves instead of the following character. The fix skips TranslateMessage for surface windows (discriminated by class atom); ToUnicode in handleKeyEvent is now the sole consumer of the dead-key state. The same race in the Win32 Input Mode path (used by PowerShell + PSReadLine) is fixed by the same change: ~+a in a PowerShell prompt now correctly produces ã. Edit controls (search bar, command palette, tab rename) are unaffected and still receive TranslateMessage.
• shift+5, ctrl+u, ctrl+d, ctrl+f, arrow keys, and enter no longer drop their effective character when typed into applications that use Win32 Input Mode (notably Claude Code's prompt via ConPTY): on a JIS layout shift+5 was arriving as 5 instead of %. The trigger was Claude enabling kitty-keyboard / modifyOtherKeys on top of Win32 Input Mode, after which core_surface.keyCallback would encode the keystroke through the legacy/kitty path and return .consumed — the apprt then suppressed its own \x1b[Vk;Sc;Uc;Kd;Cs;Rc_ sequence, so the receiving app only ever saw the core encoding (a kitty-kbd CSI for shift+5 that Claude rendered as 5). Win32 Input Mode is the apprt's exclusive wire format, so Surface.encodeKey now short-circuits whenever DEC mode 9001 is active. Bindings still fire (binding lookup runs before encodeKey); modifier release tracking still works.
• toggle_background_opacity state now propagates to newly created windows. Toggling a window to opaque and then opening a new window via new_window no longer drops the new window back to the configured background-opacity. Mirrors macOS behavior from upstream #11583.
• Global keybindings now fire from inside the inline tab rename / search bar / command palette Edit controls. Previously the Edit ate Ctrl-modified keystrokes so e.g. Ctrl+Shift+P while renaming did nothing; now those bubble up to the surface (the popup is dismissed first, the action then runs). Ctrl+A/C/V/X/Y/Z without Shift still stay with the Edit as text-editing shortcuts.
• Inline tab rename now commits on focus loss (clicking on the terminal, Alt+Tab, etc.) instead of silently reverting — matches Win32 inline-edit convention used by Explorer file rename and the Edge tab rename. Enter still commits explicitly, Esc cancels.
• Inline tab rename Edit displays the real tab title cleanly. It was showing trailing box glyphs because the Edit was given a pointer to the raw 256-u16 buffer and CreateWindowExW read uninitialized memory past the title looking for a NUL terminator.
• Clicking on the terminal now actually takes keyboard focus. WS_CHILD surface windows don't auto-focus the way top-level windows do, so without an explicit SetFocus(hwnd) on WM_LBUTTONDOWN/WM_RBUTTONDOWN/WM_MBUTTONDOWN a sibling popup edit (rename, palette, search) kept focus and the click did nothing visible.
• Command palette and search bar now auto-dismiss when their Edit loses focus — clicking elsewhere in the terminal, switching to another app via Alt+Tab. Matches popup UX in VS Code (command palette) and Edge/Chrome (find bar). Esc still dismisses explicitly. Clicking a palette item still executes it normally; the popup doesn't take focus on click, so the Edit retains focus through item selection.

• Horizontal scroll support via WM_MOUSEHWHEEL.
• File drag-and-drop onto a terminal pastes the file path(s), quoting if whitespace is present.
• present_terminal action now restores+focuses the window.
• mouse_visibility action toggles the cursor via SetCursor(NULL).
• command_finished flashes the taskbar button on non-zero exit when the window is unfocused.
• float_window action sets/clears WS_EX_TOPMOST.
• toggle_visibility hides/shows all top-level windows.
• size_limit action enforces minimum/maximum window dimensions via WM_GETMINMAXINFO.
• color_change (OSC 10/11) updates the class background brush so the resize-flash matches.
• ring_bell now also flashes the taskbar when the window is unfocused.
• Confirm-close dialog when programmatically closing a tab while a shell command is running.
• Built-in ghostty.ico is used for the window icon and tray notifications (was the generic Windows app icon).
• New windows cascade 30px from the most recently created window.
• Build option -Dwindows-console=true keeps stderr visible in release builds for debugging.
• Title-bar color tracks the configured background on Windows 11 22H2+ (DWMWA_CAPTION_COLOR), and dark/light chrome is chosen by background luminance instead of being hardcoded dark.
• Title-bar chrome refreshes on config reload.
• Clicking the update-available balloon opens the GitHub releases page in the user's default browser.
• Update-check requests are rate-limited to once per hour via a persisted timestamp at %LOCALAPPDATA%/ghostty/update_check_at.
• VS_VERSION_INFO resource is filled in (Explorer → Properties → Details shows real values; signtool tooling has version metadata to attach).
• Application manifest declares UTF-8 active codepage, longPathAware, and supportedOS GUIDs for Windows 7 through 11.
• test_window_size_config now hard-fails (was non-blocking) if the configured window width didn't take effect.
• test_resize is a real test (was permanently SKIPPED).
• ghostty_test.sh pre-kills leftover processes and retries the exe copy once, eliminating intermittent EBUSY in batch runs.

• Update-check version source is now build_config.version (set by the win-v git tag at build time) instead of a hardcoded constant that drifted every release.
• Build accepts win-vX.Y.Z tags as a separate version namespace from upstream's vX.Y.Z (which still must match build.zig.zon).
• Manifest declares UTF-8 active codepage, longPathAware, and supportedOS for Windows 7-11.
• All Win32 bindings use callconv(.winapi) instead of callconv(.c). Identical ABI on x64 today; correct WNDPROC type, future-proof for x86.
• DirectWrite locale fallback chain widened: en-US, en-us, en-GB, en before index 0.
• DragDropFiles, FlashWindowEx, ShowCursor, GetSystemMetrics, SetClassLongPtrW, SIF_TRACKPOS bindings added.
• DrawTextW binding moved from gdi32 to user32 (correct DLL).

• C1: cleanupAllSurfaces was deinit'ing a local copy of each SplitTree, leaving stale arena pointers; now deinits in place and resets the slot to .empty.
• C2: A closing flag is now set before posting WM_CLOSE for the last tab; queued mouse/keyboard events are dropped while it's set so they can't allocate into a window about to be freed.
• C6: Packaging now includes share/terminfo/ghostty.terminfo (the resourcesDir sentinel on Windows). Without it, fresh ZIP installs silently failed to load themes.
• C7: Update-check version is now passed via heap pointer through WPARAM/LPARAM instead of a static buffer with no fence.
• DirectWrite no longer panics when the factory or system font collection is unavailable (Wine, restricted SKUs); discovery returns empty and callers fall back to bundled JetBrains Mono.
• ToUnicode scancode mask was 0x1FF; including bit 24 (extended-key flag) produced wrong translations for AltGr layouts.
• Palette scroll_offset @intCast could panic when the popup was too small to render any items.
• IME ImmGetCompositionStringW byte length now uses @divTrunc with parity check instead of @divExact (which would panic on odd input).
• high_surrogate buffer is cleared on focus loss and IME composition start so a stray surrogate can't pair with the next character key.
• selectTab(_) clamps the discriminant non-negative before @intCast.
• tab_rects is zero-initialized so input handlers reading it before the first WM_PAINT see a no-match instead of stack garbage.
• moveTabTo now cancels any in-progress tab rename.
• paintTabBar brush failures no longer skip the geometry update at the bottom of the loop (was piling subsequent tabs on top of the failed one).
• QuickTerminal.onWindowDestroyed unconditionally KillTimers the animation timer.
• Search/palette popup fonts are rebuilt on DPI change.
• Multi-button mouse capture: SetCapture/ReleaseCapture only run on the 0→nonzero and nonzero→0 transitions of a button-mask.
• show_child_exited MessageBoxW now actually formats the exit code into the body text instead of building it and discarding.
• Desktop and update notifications use distinct (uID, timer-id) pairs so one's auto-cleanup doesn't NIM_DELETE the other's icon.
• paintPalette font and bg brush are cached for the popup lifetime instead of allocated per repaint.
• Process HANDLE in Command.zig is now CloseHandled on deinit.
• Several upstream features that had been dropped during past merges (R1-R9 in the audit) were restored: GHOSTTY_SURFACE_ID env var, the processLinks renderer-state mutex, semantic_prompt_boundary in link detection, middle-click-action config option, default move_tab keybinding, DECBKM mode 67, macOS-only scroll magnitude flooring, freetype_windows backend variant, the GHOSTTY_ENUM_TYPED macro and GHOSTTY_MODE_REPORT_MAX_VALUE sentinel.

Initial public release.