diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e45a570..2a62a15 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,13 @@ on:
     branches:
       - main
   pull_request:
+  workflow_dispatch:
+    inputs:
+      include_ipad:
+        description: Run the milestone iPad UI suites as well
+        required: true
+        default: false
+        type: boolean
 
 permissions:
   contents: read
@@ -348,23 +355,43 @@ jobs:
         include:
           - suite: external-consumer
             label: External consumer
+            ipad: false
           - suite: quick-start-iphone
             label: Quick Start iPhone
+            ipad: false
           - suite: quick-start-ipad
             label: Quick Start iPad
+            ipad: true
           - suite: host-iphone
             label: Host App iPhone
+            ipad: false
           - suite: host-ipad
             label: Host App iPad
+            ipad: true
 
     steps:
       - name: Check out repository
+        if: >-
+          ${{
+            !matrix.ipad ||
+            (github.event_name == 'workflow_dispatch' && inputs.include_ipad)
+          }}
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Set up minimum Xcode 16 environment
+        if: >-
+          ${{
+            !matrix.ipad ||
+            (github.event_name == 'workflow_dispatch' && inputs.include_ipad)
+          }}
         uses: ./.github/actions/setup-minimum-xcode-16
 
       - name: Run ${{ matrix.label }} UI smoke with Xcode 16.0
+        if: >-
+          ${{
+            !matrix.ipad ||
+            (github.event_name == 'workflow_dispatch' && inputs.include_ipad)
+          }}
         env:
           POCKETROOT_UI_SUITE: ${{ matrix.suite }}
           POCKETROOT_UI_FAILURE_ROOT: >-
@@ -408,7 +435,12 @@ jobs:
           esac
 
       - name: Upload UI failure diagnostics
-        if: failure()
+        if: >-
+          ${{
+            failure() &&
+            (!matrix.ipad ||
+              (github.event_name == 'workflow_dispatch' && inputs.include_ipad))
+          }}
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pocketroot-ui-failure-${{ matrix.suite }}-${{ github.run_id }}-${{ github.run_attempt }}
diff --git a/CHANGELOG.en.md b/CHANGELOG.en.md
index a4771e7..39eb545 100644
--- a/CHANGELOG.en.md
+++ b/CHANGELOG.en.md
@@ -8,6 +8,13 @@ All notable PocketRoot changes are recorded here. Semantic Versioning begins wit
 
 ### Changed
 
+- Tiered the CI UI matrix by platform: ordinary PRs and default manual runs
+  execute the external consumer, Quick Start iPhone, and Host App iPhone;
+  `main` pushes keep the same routine iPhone baseline. After several larger
+  feature blocks, or for a release candidate, explicitly add iPad on the target
+  branch with `workflow_dispatch`/`include_ipad=true`. Small development steps
+  use targeted tests, so the full platform matrix no longer repeats on every
+  merge.
 - Host App Files UI smoke now waits for the expected rename, delete, or share
   action to enter the accessibility tree after pressing a file or directory.
   If the first synthesized press does not open the menu, it retries once with
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 567032a..2aa5d6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ PocketRoot 的重要变化记录在这里，并从首个公开版本开始遵循
 
 ### Changed
 
+- CI UI matrix 改为平台分层：普通 PR 与默认手动运行只执行外部消费者、Quick Start
+  iPhone 和 Host App iPhone；`main` push 也保持 iPhone 日常基线。完成几个较大功能块
+  或进入发布候选时，通过 `workflow_dispatch` 的 `include_ipad=true` 对目标分支显式补跑
+  iPad。开发期小步修改只需定向测试，完整平台矩阵不再随每次合并重复执行。
 - Host App 文件 UI smoke 现在会在长按文件或目录后，有界等待预期的重命名、删除或
   分享菜单动作进入 accessibility tree；若首次合成长按未打开菜单，会使用重新校验的
   App/条目 frame 再试一次，仍失败则带 frame 证据 fail-closed，避免直接点击尚不存在
diff --git a/Docs/Testing.md b/Docs/Testing.md
index 528fced..feb2bb5 100644
--- a/Docs/Testing.md
+++ b/Docs/Testing.md
@@ -568,6 +568,17 @@ RootFS、安装同一 XcodeGen，并取得同一 iOS 18.0 Simulator runtime；jo
 Simulator/device final-link 并执行 17 项原生 smoke。UI matrix 设置
 `fail-fast: false`，分别运行公开 SHA 外部消费者、iPhone/iPad Quick Start 和
 iPhone/iPad Host App，因此单路失败不会取消其他证据；每路使用不冲突的失败制品名。
+
+CI 按平台分层。普通 `pull_request` 与默认 `workflow_dispatch` 运行公开 SHA 外部消费者、
+Quick Start iPhone 和 Host App iPhone，不为每个日常 UI 改动重复启动 iPad。`main`
+分支的 `push` 也保持这三路 iPhone 日常基线。完成几个较大功能块、需要验证里程碑分支，
+或进入最终发布候选时，从 Actions 对目标分支手动运行 `CI`，并设置
+`include_ipad=true`，再执行全部五路 UI。开发中的小步修改先运行受影响的定向测试；
+完整平台矩阵不再随每次合并重复执行。这一分层只减少重复验证，不降低 iPhone、native、
+构建或发行门禁。
+PR 中仍保留两路 iPad check 名称以兼容既有分支保护，但门控会在 checkout、Xcode/Simulator
+安装和 UI smoke 前跳过所有实际步骤。
+
 这些 UI job 在 iPhone 16 与 iPad（第 10 代）Simulator 运行最小 Quick Start 的
 Files/Terminal 冷启动与 PTY-to-Files 文件闭环，以及 Host App 的 PTY、Files、
 Workspace、系统 document picker 导入、share sheet 保存、guest 删除后再次导入并
@@ -614,9 +625,9 @@ runtime 与 device type 重建该临时 Simulator。这些基础设施恢复合
 | Package.swift 或 native dependency | `swift test` + Demo build + 两个 arm64 final-link + native smoke |
 | `Examples/PocketRootDemo/project.yml` 或 Demo | regenerate + Demo build |
 | smoke App/runner | shell syntax + Simulator smoke + 可用时 signed device smoke |
-| Quick Start 入口或示例 | strict iOS build + iPhone/iPad Quick Start UI smoke |
+| Quick Start 入口或示例 | strict iOS build + iPhone Quick Start UI smoke；里程碑/发布候选补跑 iPad |
 | terminal/file browser | terminal tests（含二进制 stdin、原子导入、导出上限）+ strict iOS build + Demo build |
-| PTY/SwiftTerm | session/runtime unit + final-link + Host App UI smoke + signed iPhone/iPad lifecycle |
+| PTY/SwiftTerm | session/runtime unit + final-link + Host App iPhone UI smoke；里程碑/发布候选补跑 iPad，真机可用时执行 signed lifecycle |
 | 文档 | `./Scripts/check-docs.sh` |
 | 发行组成或合规证据 | 生成器测试 + `--check` + 固定 SPDX schema 校验 |
 | 制品扫描器或 CI 扫描门禁 | Ruby fixture 安全/漂移测试 + 真实 unsigned device App 生成/复验 + 固定 SPDX schema 校验 |
diff --git a/Docs/en/Testing.md b/Docs/en/Testing.md
index 1025965..eca89cf 100644
--- a/Docs/en/Testing.md
+++ b/Docs/en/Testing.md
@@ -517,7 +517,23 @@ share-sheet save, guest deletion, re-import, and content-verification UI
 closure on iPhone 16 and iPad (10th generation) Simulators. The fixture is
 written to the standalone Host App example's Documents only under the explicit
 `-PocketRootUITesting` launch argument, without relying on user iCloud or Files
-data. Set
+data.
+
+CI is tiered by platform. Ordinary `pull_request` runs and default
+`workflow_dispatch` runs execute the public-SHA external consumer, Quick Start
+iPhone, and Host App iPhone without starting iPad for every routine UI change.
+A `push` to `main` keeps the same three-suite routine iPhone baseline. After
+several larger feature blocks, when validating a milestone branch, or for a
+final release candidate, manually run `CI` for the target branch in Actions
+with `include_ipad=true` to execute all five UI suites. During development, run
+only the targeted tests affected by the small change; the full platform matrix
+no longer repeats on every merge. This tiering removes duplicate validation
+without weakening iPhone, native, build, or release gates.
+The two iPad check names remain present on PRs for existing branch-protection
+compatibility, but their gate skips every real step before checkout,
+Xcode/Simulator installation, or UI smoke.
+
+Set
 `POCKETROOT_HOST_UI_DEVICE_TYPE` and
 `POCKETROOT_HOST_UI_DEVICE_NAME` to select the Simulator created by the runner.
 Use `POCKETROOT_QUICK_START_UI_DEVICE_TYPE` and
@@ -569,8 +585,8 @@ XCFramework, or binary SDK.
 | Package/native dependency | Package + Demo + both final links + smoke |
 | `Examples/PocketRootDemo/project.yml` or Demo | Regenerate + Demo build |
 | smoke | Shell syntax + Simulator smoke + signed-device smoke when available |
-| Quick Start entry/example | Strict iOS build + iPhone/iPad Quick Start UI smoke |
-| terminal/files UI | Terminal tests + strict iOS build + Host App UI smoke |
+| Quick Start entry/example | Strict iOS build + iPhone Quick Start UI smoke; add iPad for milestones/release candidates |
+| terminal/files UI | Terminal tests + strict iOS build + Host App iPhone UI smoke; add iPad for milestones/release candidates |
 | docs | Documentation check |
 | release composition/compliance evidence | Generator tests + `--check` + pinned SPDX schema validation |
 | artifact scanner or CI scan gate | Ruby fixture security/drift tests + real unsigned-device App materialize/verify + pinned SPDX schema validation |
diff --git a/Tests/Scripts/ReleaseComplianceTests.rb b/Tests/Scripts/ReleaseComplianceTests.rb
index 6aacd3c..0a672cd 100644
--- a/Tests/Scripts/ReleaseComplianceTests.rb
+++ b/Tests/Scripts/ReleaseComplianceTests.rb
@@ -1047,6 +1047,17 @@ def test_minimum_xcode_ci_parallelizes_native_and_ui_coverage
         .first
     assert_includes ui_job_header, "timeout-minutes: 60"
     assert_includes workflow, "fail-fast: false"
+    assert_includes workflow, "workflow_dispatch:"
+    assert_includes workflow, "include_ipad:"
+    assert_includes workflow, "Run the milestone iPad UI suites as well"
+    assert_equal 4, workflow.scan("!matrix.ipad ||").length
+    refute_includes workflow, "github.event_name == 'push' ||"
+    assert_includes(
+      workflow,
+      "github.event_name == 'workflow_dispatch' && inputs.include_ipad"
+    )
+    assert_equal 3, workflow.scan("ipad: false").length
+    assert_equal 2, workflow.scan("ipad: true").length
     assert_equal(
       2,
       workflow.scan("uses: ./.github/actions/setup-minimum-xcode-16").length