HelloThisWorld · HelloThisWorld · Aug 12, 2026 · Aug 12, 2026
@@ -15,7 +15,7 @@ concurrency:
 jobs:
   checkpoint-validation:
     name: Validate engineering checkpoint
-    if: ${{ contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2"]'), github.ref_name) }}
+    if: ${{ contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2","v1.3.3"]'), github.ref_name) }}
     runs-on: windows-2022
     timeout-minutes: 30
     steps:
@@ -35,7 +35,7 @@ jobs:
 
   validate:
     name: Validate exact release source
-    if: ${{ !contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2"]'), github.ref_name) }}
+    if: ${{ !contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2","v1.3.3"]'), github.ref_name) }}
     runs-on: windows-2022
     timeout-minutes: 30
     steps:
@@ -82,7 +82,7 @@ jobs:
 
   test-x64:
     name: Build and test x64 Release
-    if: ${{ !contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2"]'), github.ref_name) }}
+    if: ${{ !contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2","v1.3.3"]'), github.ref_name) }}
     needs: validate
     runs-on: windows-2022
     timeout-minutes: 240
@@ -102,7 +102,7 @@ jobs:
 
   release:
     name: Build, test, attest, and publish EXE and Portable ZIP
-    if: ${{ !contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2"]'), github.ref_name) }}
+    if: ${{ !contains(fromJSON('["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2","v1.3.3"]'), github.ref_name) }}
     needs:
       - validate
       - test-x64

@@ -1,5 +1,75 @@
 # Changelog
 
+## 1.3.3 - 2026-08-12
+
+Engineering checkpoint for the Pane Search roadmap, Phase 3: performance and
+edge-case hardening. Like the earlier checkpoints, this version marks merged
+development work only: it is not a published release and produces no
+downloadable artifacts; GitHub Latest and WinGet keep pointing at the stable
+v1.2.0, and v1.3.0-beta3 remains the newest published prerelease.
+
+### Changed
+
+- Live-typing searches are now coalesced per pane. Each executed search scans
+  the entire scrollback on the UI thread, and previously every keystroke ran
+  one such scan synchronously. Keystrokes arriving within 50 ms now collapse
+  into a single trailing search; the leading keystroke still searches
+  immediately, so a single keypress is as responsive as before. The coalesced
+  callback reads the search box's state at fire time, so the latest query
+  always wins and a stale queued query can never overwrite newer results.
+  Navigation (Enter, Shift+Enter, the arrow buttons) keeps executing
+  synchronously with the box's current text and therefore can never act on a
+  stale query. Deleting the query clears highlights, overview markers, and
+  status immediately, and a pending coalesced search after Esc finds the box
+  closed and does nothing.
+- An open search now converges while output streams continuously. The
+  existing OutputIdle refresh is debounced (it fires only after 100 ms of
+  quiet), so sustained output such as `tail -f` starved it and froze the
+  match counter, highlights, and overview markers indefinitely. While a
+  search is active, a companion non-debounced throttle now refreshes the
+  search at most once per 500 ms during sustained output; quiet terminals
+  keep using the existing OutputIdle path unchanged. The throttle is armed
+  only from the output handler while a search is active — with search closed
+  the output path pays one relaxed atomic load and schedules nothing.
+- The scrollbar mark bitmap now repaints only when one of its inputs changes
+  (geometry, mark categories, search state, pip color, or — while generic
+  marks render — the buffer). Its content is independent of the thumb
+  position, yet every throttled scroll tick used to re-enumerate the full
+  occurrence list and all mark rows to repaint an identical bitmap; plain
+  scrolling with a large result set now skips that work entirely.
+
+### Fixed
+
+- Resizing a pane with an active search no longer creates a stray selection.
+  The resize invalidation reused the search-close path, which converts the
+  focused match into a selection (GH#19358); after a reflow those stored
+  spans describe the pre-reflow buffer, so the resize could select arbitrary
+  coordinates and skew the recomputed current match. The close path keeps
+  selecting the focused result; the resize path now only invalidates.
+- Switching between the main and alternate screen buffers now drops stored
+  search highlight spans immediately. They were computed against the other
+  buffer, and the renderer could paint them at wrong positions for up to one
+  refresh interval after entering or leaving a full-screen application.
+  Search itself keeps following the active buffer, recomputing against the
+  alternate screen while it is engaged and against the main buffer after it
+  ends.
+- Clearing the search now releases the terminal-side highlight span copy
+  instead of retaining its capacity until the next search; with very high
+  match counts that memory previously stayed allocated after Esc.
+
+### Added
+
+- Deterministic regression coverage for the hardened edges: buffer mutation
+  invalidation and post-output count refresh, focused-match anchoring while
+  matches are appended, scrollback-eviction safety with a tiny history,
+  reflow invalidation with the no-stray-selection guarantee, alternate-screen
+  transitions, search-state generation and mid-output arming semantics,
+  scrollbar repaint-signature contracts, and wide-character span widths
+  (Traditional and Simplified Chinese, Japanese, Korean, accented Latin, and
+  emoji). A search-scan smoke benchmark logs per-query scan cost for common,
+  rare, no-match, regex, and invalid-regex queries without asserting on wall
+  clock, and scales up locally through `WINTERM_SEARCH_BENCH_LINES`.
+
 ## 1.3.2 - 2026-08-12
 
 Engineering checkpoint for the Pane Search roadmap, Phase 2: search UX and

@@ -38,7 +38,7 @@ Microsoft、Windows、Windows Terminalのロゴも使用していません。
 - `winTerm-<version>-setup-x64.exe` — 現在のユーザー、または全ユーザーへのインストール用;
 - `winTerm-<version>-portable-x64.zip` — 展開してそのまま実行する用。
 
-現在のソースバージョンは `1.3.2` で、
+現在のソースバージョンは `1.3.3` で、
 最新の安定版リリースは `1.2.0` です。公開されている資産の一覧とチェックサムの全体は、
 [最新の公式リリース](https://github.com/HelloThisWorld/winTerm/releases/latest)
 を参照してください。
@@ -111,8 +111,8 @@ PowerShell 7と、[ビルド手順（英語）](docs/build.md)に記載された
 .\scripts\winterm\build.ps1 -Configuration Release -Platform x64 -IncludeTests
 .\scripts\winterm\test.ps1 -Suite Relevant -Configuration Release -Platform x64
 .\scripts\winterm\build-unpackaged.ps1 -Configuration Release -Platform x64
-.\scripts\winterm\build-installer.ps1 -Version 1.3.2 -Platform x64
-.\scripts\winterm\build-portable.ps1 -Version 1.3.2 -Platform x64
+.\scripts\winterm\build-installer.ps1 -Version 1.3.3 -Platform x64
+.\scripts\winterm\build-portable.ps1 -Version 1.3.3 -Platform x64
 ```
 
 アンパッケージ形式の生成処理では、統合されたリソースインデックスを作るための

@@ -37,7 +37,7 @@ application downloads are:
 - `winTerm-<version>-setup-x64.exe` — current-user or all-users installation;
 - `winTerm-<version>-portable-x64.zip` — extract and run without installation.
 
-The current source version is `1.3.2`;
+The current source version is `1.3.3`;
 the latest stable release is `1.2.0`. See the
 [latest official Release](https://github.com/HelloThisWorld/winTerm/releases/latest)
 for the complete published asset list and checksums.
@@ -106,8 +106,8 @@ Use PowerShell 7 and the Microsoft Terminal toolchain described in
 .\scripts\winterm\build.ps1 -Configuration Release -Platform x64 -IncludeTests
 .\scripts\winterm\test.ps1 -Suite Relevant -Configuration Release -Platform x64
 .\scripts\winterm\build-unpackaged.ps1 -Configuration Release -Platform x64
-.\scripts\winterm\build-installer.ps1 -Version 1.3.2 -Platform x64
-.\scripts\winterm\build-portable.ps1 -Version 1.3.2 -Platform x64
+.\scripts\winterm\build-installer.ps1 -Version 1.3.3 -Platform x64
+.\scripts\winterm\build-portable.ps1 -Version 1.3.3 -Platform x64
 ```
 
 The unpackaged generator uses an unsigned MSIX only as an upstream build

@@ -4,22 +4,22 @@ Last updated: 2026-08-12
 
 ## Repository state
 
-- Branch: `feature/v1.3.2-pane-search-phase2`, based on `main` at
-  `8015963ad` (Pane Search Phase 1 checkpoint, pull request #44)
+- Branch: `feature/v1.3.3-pane-search-phase3`, based on `main` at
+  `97ecb7e85` (Pane Search Phase 2 checkpoint, pull request #45)
 - Microsoft Terminal upstream revision:
   `1cea42d433253d95c4487a3037db48197b5e72f4`
-- Application version: `1.3.2`
-- Package/file version: `1.3.2.0`
-- PowerShell module version: `1.3.2` with no prerelease suffix
+- Application version: `1.3.3`
+- Package/file version: `1.3.3.0`
+- PowerShell module version: `1.3.3` with no prerelease suffix
 - Release channel: `stable` (engineering checkpoint; nothing is published)
-- Checkpoint tag: `v1.3.2`, listed with the earlier checkpoint tags in the
+- Checkpoint tag: `v1.3.3`, listed with the earlier checkpoint tags in the
   release workflow so a pushed checkpoint tag runs quick validation only and
   can never produce release artifacts
 - Current public Latest: `v1.2.0`, the stable Visual Progress release
 - Newest published prerelease: `v1.3.0-beta3` on the beta channel
 - Supported target: Windows 11 x64
 
-`v1.3.2` is an engineering checkpoint, the second of the Pane Search roadmap
+`v1.3.3` is an engineering checkpoint, the third of the Pane Search roadmap
 toward v1.4. Like the v1.2.1 through v1.2.4 Command Timeline checkpoints, it
 is a source/development version only: no GitHub Release, website slot, or
 WinGet update is produced, and `/releases/latest` keeps resolving to v1.2.0.
@@ -28,9 +28,10 @@ WinGet update is produced, and `/releases/latest` keeps resolving to v1.2.0.
 
 - Phase 1 — active-pane search — complete at `1.3.1`.
 - Phase 2 — search UX and scrollbar overview — complete at `1.3.2`.
-- Phase 3 — performance investigation and hardening — next, at `1.3.3`.
+- Phase 3 — performance and edge-case hardening — complete at `1.3.3`.
 - Final integration — `1.4.0-alpha`, promoted to beta only after manual
-  user validation.
+  user validation. Starting `1.4.0-alpha` requires a separate instruction;
+  it is not begun automatically.
 
 Phase 1 made `Ctrl+F` (with the retained `Ctrl+Shift+F` alias) open the
 existing Microsoft Terminal search box inside the focused pane only,
@@ -55,8 +56,25 @@ only through the existing throttled scrollbar update path — no timers, no
 polling. Split panes keep fully isolated search state, including their
 overview markers.
 
-Deferred to Phase 3: performance work such as debouncing, large-scrollback
-optimization, and search-related edge-case hardening.
+Phase 3 hardened that experience for real terminal workloads without adding
+any new search engine, index, or persistent state. Live typing is coalesced
+per pane (50 ms, leading immediate + trailing latest, reading the search
+box's state at fire time so the latest query always wins and navigation can
+never act on a stale query). An open search now converges during sustained
+output: the debounced OutputIdle refresh is complemented by a non-debounced
+500 ms cap armed only while a search is active, so `tail -f`-style streams
+no longer freeze the counter, highlights, or overview — and search closed
+still means zero recurring search work. The scrollbar mark bitmap repaints
+only when its inputs change, so plain scrolling with large result sets no
+longer re-enumerates occurrences. Edge cases were fixed deterministically:
+pane resize no longer converts pre-reflow spans into a stray selection,
+main/alt buffer switches drop the other buffer's highlight spans immediately
+(search keeps following the active buffer), and closing search releases the
+terminal-side span copy. Regression tests cover mutation invalidation,
+match-anchor stability during appended output, scrollback eviction, reflow,
+alternate-screen transitions, generation/arming semantics, repaint-signature
+contracts, wide-character spans (CJK, Korean, accented Latin, emoji), and a
+log-only scan benchmark (`WINTERM_SEARCH_BENCH_LINES` scales it locally).
 
 ## Command Timeline status
 
@@ -171,10 +189,10 @@ through pull request #32:
 
 ## Next steps
 
-1. Pane Search Phase 3 (`1.3.3`): performance investigation and hardening.
-2. Final integration checkpoint `1.4.0-alpha`, then manual user validation
-   before any beta promotion.
-3. Collect Command Timeline beta feedback; promote a stable `v1.3.0` only
+1. Final integration checkpoint `1.4.0-alpha`, then manual user validation
+   before any beta promotion. This stage requires a separate instruction
+   from the user; do not begin it automatically.
+2. Collect Command Timeline beta feedback; promote a stable `v1.3.0` only
    after beta testing, which is the point at which Latest, WinGet, and the
    website stable slot move.
 

@@ -32,9 +32,9 @@ foreach ($relativePath in $sourceAssets)
 }
 
 $version = Get-Content -LiteralPath (Join-Path $repositoryRoot 'shell\shared\version.json') -Raw | ConvertFrom-Json
-if ($version.moduleVersion -ne '1.3.2' -or
+if ($version.moduleVersion -ne '1.3.3' -or
     $version.modulePrerelease -ne '' -or
-    $version.applicationVersion -ne '1.3.2' -or
+    $version.applicationVersion -ne '1.3.3' -or
     $version.protocolVersion -ne 1)
 {
     throw 'The winTerm Shell asset version metadata is invalid.'

@@ -23,7 +23,7 @@ try
         "- 'v*'",
         'checkpoint-validation:',
         'Validate engineering checkpoint',
-        '["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2"]',
+        '["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2","v1.3.3"]',
         'verify-version.ps1 -RequireTag',
         'test.ps1 -Suite Smoke',
         'contents: write',
@@ -63,7 +63,7 @@ try
         }
     }
 
-    $checkpointGuard = 'contains(fromJSON(''["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2"]''), github.ref_name)'
+    $checkpointGuard = 'contains(fromJSON(''["v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.1","v1.3.2","v1.3.3"]''), github.ref_name)'
     if ([regex]::Matches($workflow, [regex]::Escape($checkpointGuard)).Count -ne 4)
     {
         throw 'Release workflow must guard the checkpoint validation and all three full release jobs.'

@@ -1431,12 +1431,12 @@ try
 
     $version = $source.VersionMetadata | ConvertFrom-Json
     $expectedVersionValues = [ordered]@{
-        applicationVersion = '1.3.2'
-        packageVersion = '1.3.2.0'
-        moduleVersion = '1.3.2'
+        applicationVersion = '1.3.3'
+        packageVersion = '1.3.3.0'
+        moduleVersion = '1.3.3'
         modulePrerelease = ''
         channel = 'stable'
-        tag = 'v1.3.2'
+        tag = 'v1.3.3'
         workspaceSchemaVersion = 2
         dockingModelVersion = 1
         shellProtocolVersion = 1
@@ -1451,39 +1451,39 @@ try
         }
     }
     $shellVersion = $source.ShellVersion | ConvertFrom-Json
-    if ($shellVersion.applicationVersion -ne '1.3.2' -or $shellVersion.moduleVersion -ne '1.3.2' -or $shellVersion.protocolVersion -ne 1)
+    if ($shellVersion.applicationVersion -ne '1.3.3' -or $shellVersion.moduleVersion -ne '1.3.3' -or $shellVersion.protocolVersion -ne 1)
     {
-        throw 'Shell version metadata does not match winTerm version 1.3.2 with protocol version 1.'
+        throw 'Shell version metadata does not match winTerm version 1.3.3 with protocol version 1.'
     }
     foreach ($surface in @(
-        @{ Content = $source.ReleaseMetadata; Value = 'ApplicationVersion{ L"1.3.2" }'; Description = 'About release metadata' },
-        @{ Content = $source.PackageManifest; Value = 'Version="1.3.2.0"'; Description = 'MSIX package manifest' },
-        @{ Content = $source.HostResource; Value = 'FILEVERSION 1,3,2,0'; Description = 'Terminal host file version' },
-        @{ Content = $source.HostResource; Value = '"ProductVersion", "1.3.2\0"'; Description = 'Terminal host display version' },
-        @{ Content = $source.ShimResource; Value = 'FILEVERSION 1,3,2,0'; Description = 'Shim file version' },
-        @{ Content = $source.ShimResource; Value = '"ProductVersion", "1.3.2\0"'; Description = 'Shim display version' },
+        @{ Content = $source.ReleaseMetadata; Value = 'ApplicationVersion{ L"1.3.3" }'; Description = 'About release metadata' },
+        @{ Content = $source.PackageManifest; Value = 'Version="1.3.3.0"'; Description = 'MSIX package manifest' },
+        @{ Content = $source.HostResource; Value = 'FILEVERSION 1,3,3,0'; Description = 'Terminal host file version' },
+        @{ Content = $source.HostResource; Value = '"ProductVersion", "1.3.3\0"'; Description = 'Terminal host display version' },
+        @{ Content = $source.ShimResource; Value = 'FILEVERSION 1,3,3,0'; Description = 'Shim file version' },
+        @{ Content = $source.ShimResource; Value = '"ProductVersion", "1.3.3\0"'; Description = 'Shim display version' },
         @{ Content = $source.CustomProps; Value = '<VersionMajor>1</VersionMajor>'; Description = 'Executable major version' },
         @{ Content = $source.CustomProps; Value = '<VersionMinor>3</VersionMinor>'; Description = 'Executable minor version' },
-        @{ Content = $source.ShellModuleManifest; Value = "ModuleVersion = '1.3.2'"; Description = 'PowerShell module manifest' },
-        @{ Content = $source.ShellModule; Value = "`$script:WinTermModuleVersion = '1.3.2'"; Description = 'PowerShell module runtime' },
+        @{ Content = $source.ShellModuleManifest; Value = "ModuleVersion = '1.3.3'"; Description = 'PowerShell module manifest' },
+        @{ Content = $source.ShellModule; Value = "`$script:WinTermModuleVersion = '1.3.3'"; Description = 'PowerShell module runtime' },
         @{ Content = $source.PackageShellAssets; Value = "'shell\shared\version.json'"; Description = 'Canonical shell version metadata packaging' },
-        @{ Content = $source.WorkspaceSerializer; Value = '"1.3.2"'; Description = 'Workspace application-version fallback' }
+        @{ Content = $source.WorkspaceSerializer; Value = '"1.3.3"'; Description = 'Workspace application-version fallback' }
     ))
     {
         Assert-Contains $surface.Content $surface.Value $surface.Description
     }
     foreach ($required in @(
-        "applicationVersion -eq '1.3.2'",
-        "packageVersion -eq '1.3.2.0'",
-        "moduleVersion -eq '1.3.2'",
-        "tag -eq 'v1.3.2'",
+        "applicationVersion -eq '1.3.3'",
+        "packageVersion -eq '1.3.3.0'",
+        "moduleVersion -eq '1.3.3'",
+        "tag -eq 'v1.3.3'",
         "Workspace Schema version remains 2",
         "Docking Model version remains 1",
         "Shell Protocol version remains 1",
         "Theme Schema remains at version 1"
     ))
     {
-        Assert-Contains $source.VerifyVersion $required 'Authoritative v1.3.2 version validation surface'
+        Assert-Contains $source.VerifyVersion $required 'Authoritative v1.3.3 version validation surface'
     }
 
     $testBinary = Join-Path $root "bin\$Platform\$Configuration\UnitTests_SettingsModel\SettingsModel.Unit.Tests.dll"

@@ -292,7 +292,7 @@ function Test-ShellExperienceFoundations
     }
 
     $manifest = Import-PowerShellDataFile -LiteralPath $moduleManifest
-    if ($manifest.ModuleVersion -ne '1.3.2' -or
+    if ($manifest.ModuleVersion -ne '1.3.3' -or
         $manifest.PrivateData.PSData.Prerelease -ne '' -or
         $manifest.PowerShellVersion -ne '5.1')
     {