From 916cb7af200fc46810e453149750dfcad1ec4325 Mon Sep 17 00:00:00 2001
From: Dave Robertson <avbydave@gmail.com>
Date: Sun, 16 Aug 2026 06:41:41 -0400
Subject: [PATCH 1/2] ci: add iOS simulator build workflow (ios-build.yml)

Modeled on prompt-lab's ipad-prototype.yml. Path-filtered to the iOS subtree; build-only where the scheme has UI tests only, build + unit tests where a unit test target exists. Part of the 2026-08-16 iOS build hardening sweep.
---
 .github/workflows/ios-build.yml | 50 +++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 .github/workflows/ios-build.yml

diff --git a/.github/workflows/ios-build.yml b/.github/workflows/ios-build.yml
new file mode 100644
index 0000000..157fc26
--- /dev/null
+++ b/.github/workflows/ios-build.yml
@@ -0,0 +1,50 @@
+name: iOS Build
+
+# Modeled on prompt-lab/.github/workflows/ipad-prototype.yml.
+# Builds the native iPad app (PlotForgeNative scheme, which pulls in the
+# PlotForgeNative Swift package) for the iOS Simulator. The scheme has UI
+# tests only, so this is build-only.
+#
+# Runner note: the app targets Swift 6 (SWIFT_VERSION = 6.0), which needs
+# Xcode 16+, so this uses macos-15 rather than the macos-14 image the
+# prompt-lab (Swift 5) workflow uses.
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - native/**
+      - .github/workflows/ios-build.yml
+  pull_request:
+    paths:
+      - native/**
+      - .github/workflows/ios-build.yml
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ios-build-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  native-build:
+    name: Native build (iOS Simulator, iPad)
+    runs-on: macos-15
+    timeout-minutes: 25
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Toolchain
+        run: xcodebuild -version
+
+      - name: Build PlotForgeNative
+        run: >-
+          xcodebuild build
+          -project native/PlotForgeNativeApp/PlotForgeNative.xcodeproj
+          -scheme PlotForgeNative
+          -destination "generic/platform=iOS Simulator"
+          CODE_SIGNING_ALLOWED=NO

From 5440c05e957a3629fd23a16bf731f10e8ab35ff2 Mon Sep 17 00:00:00 2001
From: Dave Robertson <avbydave@gmail.com>
Date: Sun, 16 Aug 2026 06:45:21 -0400
Subject: [PATCH 2/2] =?UTF-8?q?ci(ios):=20run=20on=20macos-26=20=E2=80=94?=
 =?UTF-8?q?=20Xcode=2016.4=20type-checker=20times=20out=20on=20PlotForgeSh?=
 =?UTF-8?q?ellView.swift:544?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .github/workflows/ios-build.yml | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/ios-build.yml b/.github/workflows/ios-build.yml
index 157fc26..5118f72 100644
--- a/.github/workflows/ios-build.yml
+++ b/.github/workflows/ios-build.yml
@@ -5,9 +5,12 @@ name: iOS Build
 # PlotForgeNative Swift package) for the iOS Simulator. The scheme has UI
 # tests only, so this is build-only.
 #
-# Runner note: the app targets Swift 6 (SWIFT_VERSION = 6.0), which needs
-# Xcode 16+, so this uses macos-15 rather than the macos-14 image the
-# prompt-lab (Swift 5) workflow uses.
+# Runner note: the app targets Swift 6 (SWIFT_VERSION = 6.0). On Xcode 16.4
+# (macos-15 default) the Swift type-checker times out on
+# PlotForgeShellView.swift:544 ("unable to type-check this expression in
+# reasonable time"), while Xcode 26.x compiles it, so this uses macos-26
+# (Xcode 26.6 default) rather than the macos-14/15 images the Swift 5
+# workflows use. First attempt on macos-15: run 31942344241.
 
 on:
   push:
@@ -32,7 +35,7 @@ concurrency:
 jobs:
   native-build:
     name: Native build (iOS Simulator, iPad)
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 25
     steps:
       - name: Checkout