lawrencecchen · Nov 1, 2026 · Oct 31, 2026 · Nov 1, 2026 · Nov 1, 2026
diff --git a/Packages/Shared/CmuxGhosttyKit/Package.swift b/Packages/Shared/CmuxGhosttyKit/Package.swift
@@ -90,11 +90,12 @@ import PackageDescription
 // draws to at most one per display refresh (it drew one per output batch,
 // 190-270 frames a second on a 120 Hz iPhone).
 //
-// Since 9ce9b7d08..8444cc1eb (release/cmux-9ce9b7d0-e2: the pin plus only
+// Since 9ce9b7d08..84a225487 (release/cmux-9ce9b7d0-e2: the pin plus only
 // fork PR #66 and the release workflow of #67): a scroll region scroll breaks
 // the soft wrap across its edges, and the unwrapping formatter carries blank
 // cells only across a joined wrap (VT fuzz finding E2: the attach replay drew
-// the row under a DECSTBM region 43 or 163 columns to the right).
+// the row under a DECSTBM region 43 or 163 columns to the right). The edge
+// break reads a compressed history row only when the pair was joined.
 //
 // A pin change is one reviewed commit that changes the URL and the checksum
 // together (the zip's sha256, also in the release's SHA256SUMS). Never pin
@@ -119,8 +120,8 @@ let package = Package(
         ),
         .binaryTarget(
             name: "GhosttyNextKit",
-            url: "https://github.com/manaflow-ai/ghostty-next/releases/download/xcframework-8444cc1eb8436b090fdccbdb2369e9c3816f9f26-apple-v6/GhosttyNextKit.xcframework.zip",
-            checksum: "eee858c7830376f0e99e7e612de60b9c731d11a681cb1c27eb1f9174d4c8516f"
+            url: "https://github.com/manaflow-ai/ghostty-next/releases/download/xcframework-84a225487372c53851b186864c867e469e7596d2-apple-v6/GhosttyNextKit.xcframework.zip",
+            checksum: "66e883f7130352862fd3dd4b46cf0a6d22d50750bf633f3589831bf9b2f4f99f"
         ),
     ]
 )
diff --git a/cmux-tui/dist/notices/package-notices.json b/cmux-tui/dist/notices/package-notices.json
@@ -8,8 +8,8 @@
   },
   "libghostty_vt": {
     "source": "ghostty-next",
-    "commit": "8444cc1eb8436b090fdccbdb2369e9c3816f9f26",
-    "license_tree": "collect-ghostty-licenses.py tree of the cmux-next source archive dry run 37315600598 (3320bd06e; 2199dc93e changes only src/renderer/Thread.zig 3339f2ada only src/terminal (OSC 7501), CI files and NEXT.md, and 673a6369c only src/build (libSystem override), src/terminal and src/terminfo (Pst), c41410256 only src/, include/ghostty.h and CI files (link filter), 89dc50175 only src/config/c_get.zig (TerminalColor getter), 03ddb2869 only src/renderer and NEXT.md (glass minimum contrast), 4792f0307 only src/renderer and NEXT.md (minimum contrast at opacity 0), 48d353b8c only src/renderer, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (host-sized target), c5926d664 only src/renderer, src/Surface.zig, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (reflow preview), e4831af81 only src/renderer, src/termio/Termio.zig, src/Surface.zig, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (GPU theme color blend), e6a27a1fb the same paths (no cell rebuild for a color-only change), a19c884fa only pkg/macos/iosurface/iosurface.zig (deinit keeps pixels other owners hold; no license file or dependency change), and 36ce68b13 and ced99dcde only src/renderer, src/termio/Termio.zig, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (one rebuild per font change), and e923d79f1 only src/Surface.zig, src/termio and NEXT.md (CSI 996 runtime color scheme), and 839e702fe through a04c57e81 only src/terminal/formatter.zig, src/termio/Termio.zig, src/Surface.zig and NEXT.md (DECSC in VT output, viewport across snapshot restores), and 43ffe4171 only src/terminal and the CI workflow (narrowed multi-line prompt redraw), and 493a8871b and 5555f4220 only src/terminal/c, include/ghostty/vt, src/shell-integration, the CI workflow and NEXT.md (prompt redraw option and marks), and 72578da21 only src/shell-integration/bash (no bash forks) and a85741ad3 through 7d5fa1573 only src/renderer, src/termio/Termio.zig, src/apprt/embedded.zig, include/ghostty.h, the CI workflow and NEXT.md (host-sized resize frames, mirror pixel-only resize, idle wakes), and dadbd13db through 1f98b11be only src/renderer, src/termio/Termio.zig, src/Surface.zig, src/apprt/embedded.zig, include/ghostty.h, the CI workflow and NEXT.md (host-size present API, review fixes, reveal present), and 856edfe through 723c4ab only src/renderer, src/termio, src/terminal (kitty), src/Surface.zig, src/apprt, include/ghostty.h, include/ghostty/vt and NEXT.md (wheel scroll off the main-thread lock, fit grid, kitty ports), and 0cb7e1e04 through 9ce9b7d08 only src/renderer, src/apprt/embedded.zig, include/ghostty.h, src/shell-integration/bash and NEXT.md (host-size frame present, bash history without a fork, iOS display link), and 19ab1cbcb through 8444cc1eb only src/terminal (Screen.zig, Terminal.zig, formatter.zig), the CI workflow and next/release_plan.py (scroll region wrap edges, formatter blank carry, release/* publish), so LICENSE, build.zig.zon and vendor/ are identical and pkg/ has no license change)",
+    "commit": "84a225487372c53851b186864c867e469e7596d2",
+    "license_tree": "collect-ghostty-licenses.py tree of the cmux-next source archive dry run 37315600598 (3320bd06e; 2199dc93e changes only src/renderer/Thread.zig 3339f2ada only src/terminal (OSC 7501), CI files and NEXT.md, and 673a6369c only src/build (libSystem override), src/terminal and src/terminfo (Pst), c41410256 only src/, include/ghostty.h and CI files (link filter), 89dc50175 only src/config/c_get.zig (TerminalColor getter), 03ddb2869 only src/renderer and NEXT.md (glass minimum contrast), 4792f0307 only src/renderer and NEXT.md (minimum contrast at opacity 0), 48d353b8c only src/renderer, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (host-sized target), c5926d664 only src/renderer, src/Surface.zig, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (reflow preview), e4831af81 only src/renderer, src/termio/Termio.zig, src/Surface.zig, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (GPU theme color blend), e6a27a1fb the same paths (no cell rebuild for a color-only change), a19c884fa only pkg/macos/iosurface/iosurface.zig (deinit keeps pixels other owners hold; no license file or dependency change), and 36ce68b13 and ced99dcde only src/renderer, src/termio/Termio.zig, src/apprt/embedded.zig, include/ghostty.h and NEXT.md (one rebuild per font change), and e923d79f1 only src/Surface.zig, src/termio and NEXT.md (CSI 996 runtime color scheme), and 839e702fe through a04c57e81 only src/terminal/formatter.zig, src/termio/Termio.zig, src/Surface.zig and NEXT.md (DECSC in VT output, viewport across snapshot restores), and 43ffe4171 only src/terminal and the CI workflow (narrowed multi-line prompt redraw), and 493a8871b and 5555f4220 only src/terminal/c, include/ghostty/vt, src/shell-integration, the CI workflow and NEXT.md (prompt redraw option and marks), and 72578da21 only src/shell-integration/bash (no bash forks) and a85741ad3 through 7d5fa1573 only src/renderer, src/termio/Termio.zig, src/apprt/embedded.zig, include/ghostty.h, the CI workflow and NEXT.md (host-sized resize frames, mirror pixel-only resize, idle wakes), and dadbd13db through 1f98b11be only src/renderer, src/termio/Termio.zig, src/Surface.zig, src/apprt/embedded.zig, include/ghostty.h, the CI workflow and NEXT.md (host-size present API, review fixes, reveal present), and 856edfe through 723c4ab only src/renderer, src/termio, src/terminal (kitty), src/Surface.zig, src/apprt, include/ghostty.h, include/ghostty/vt and NEXT.md (wheel scroll off the main-thread lock, fit grid, kitty ports), and 0cb7e1e04 through 9ce9b7d08 only src/renderer, src/apprt/embedded.zig, include/ghostty.h, src/shell-integration/bash and NEXT.md (host-size frame present, bash history without a fork, iOS display link), and 19ab1cbcb through 84a225487 only src/terminal (Screen.zig, Terminal.zig, formatter.zig), the CI workflow and next/release_plan.py (scroll region wrap edges, formatter blank carry, release/* publish), so LICENSE, build.zig.zon and vendor/ are identical and pkg/ has no license change)",
     "owners": {
       "ghostty-next": {
         "name": "Ghostty",

diff --git a/docs/ghostty-fork.md b/docs/ghostty-fork.md
@@ -14,16 +14,21 @@ When we change the fork, update this document and the parent submodule SHA.
 
 ### A scroll region scroll breaks the soft wrap across its edges; the formatter carries blanks only across a joined wrap (ghostty-next)
 
-- Fork release branch `release/cmux-9ce9b7d0-e2` (ghostty-next `8444cc1eb`): the pin `9ce9b7d08` plus only fork PR #66
-  (`fix-formatter-blank-carry`) and the release workflow change of fork PR #67. GhosttyNextKit
-  `xcframework-8444cc1eb8436b090fdccbdb2369e9c3816f9f26-apple-v6`.
+- Fork release branch `release/cmux-9ce9b7d0-e2` (ghostty-next `84a225487`): the pin `9ce9b7d08` plus only fork PRs #66
+  (`fix-formatter-blank-carry`) and #68 (`fix-wrap-edge-history-cost`) and the release workflow change of fork PR #67. GhosttyNextKit
+  `xcframework-84a225487372c53851b186864c867e469e7596d2-apple-v6`.
 - Root fix (`771194607` red Zig tests, `3c717e511` fix): `cursorScrollRegionUp` (fast and slow paths),
   `cursorScrollAbove` with a bottom margin, `insertLines` and `deleteLines` with a full-width region move the rows
   inside the region and keep the rows outside it. The row above the region kept `wrap` and the row below it kept
   `wrap_continuation` while their neighbour inside was replaced. `Screen.breakWrapAbove` now clears both flags of the
   pair (and a spacer head) at each edge after the scroll. At a bottom margin the cursor row moves up with its `wrap`:
-  a linefeed or SU first resets it (`cursorResetWrap`, red `93b615013`, fix `934f29984`); printWrap's index keeps its
+  a linefeed or SU first resets it (`cursorResetWrap`, red `e47ad0619`, fix `601585067`); printWrap's index keeps its
   wrap, which goes into the row the scroll makes. Left/right margin scrolls keep their old behavior.
+- Scroll-path cost (red `bc393a54b`, fix `db6d27f78`): `breakWrapAbove` decides on the resident row first (its
+  `wrap_continuation`, or for IL/DL the top row's flag read before the rows move) and reads a row in a compressed
+  history page only when the pair was joined, so a region scroll never restores a history page for nothing.
+- Commit IDs in this section are those on `release/cmux-9ce9b7d0-e2`; the same changes on the fork PR branches
+  have other IDs.
 - Defense (`19ab1cbcb` red test, `406763ee6` fix): with `unwrap`, `PageFormatter` carried a row's trailing blank
   cells into a `wrap_continuation` row even after it had emitted a line break, so a stale flag moved that row right.
   Blank cells now reset when a line break goes out before the row (`broke_before`).

diff --git a/ghostty-next b/ghostty-next
diff --git a/scripts/cmux-next/notices/vt-link-graph.json b/scripts/cmux-next/notices/vt-link-graph.json
@@ -1,5 +1,5 @@
 {
-  "commit": "8444cc1eb8436b090fdccbdb2369e9c3816f9f26",
+  "commit": "84a225487372c53851b186864c867e469e7596d2",
   "dwarfdump": "Ubuntu LLVM version 18.1.3",
   "flags": [
     "-Demit-lib-vt=true",
+1 −0		.github/workflows/next-xcframework.yml
+15 −7		src/terminal/Screen.zig
+46 −4		src/terminal/Terminal.zig