diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d209e1d..0e6f102 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,26 +39,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
 
-      - name: Write CI build settings override
-        env:
-          SPARKLE_APPCAST_URL: ${{ vars.SPARKLE_APPCAST_URL }}
-          SPARKLE_PUBLIC_KEY: ${{ vars.SPARKLE_PUBLIC_KEY }}
-        run: |
-          if [[ -z "${SPARKLE_APPCAST_URL:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_APPCAST_URL"
-            exit 1
-          fi
-
-          if [[ -z "${SPARKLE_PUBLIC_KEY:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_PUBLIC_KEY"
-            exit 1
-          fi
-
-          cat > Config/BuildSettings.local.xcconfig <<EOF
-          SPARKLE_APPCAST_URL = $SPARKLE_APPCAST_URL
-          SPARKLE_PUBLIC_KEY = $SPARKLE_PUBLIC_KEY
-          EOF
-
       - name: Build and test app (macOS)
         run: |
           RESULT_BUNDLE="$RUNNER_TEMP/BitDream.xcresult"
@@ -113,26 +93,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
 
-      - name: Write CI build settings override
-        env:
-          SPARKLE_APPCAST_URL: ${{ vars.SPARKLE_APPCAST_URL }}
-          SPARKLE_PUBLIC_KEY: ${{ vars.SPARKLE_PUBLIC_KEY }}
-        run: |
-          if [[ -z "${SPARKLE_APPCAST_URL:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_APPCAST_URL"
-            exit 1
-          fi
-
-          if [[ -z "${SPARKLE_PUBLIC_KEY:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_PUBLIC_KEY"
-            exit 1
-          fi
-
-          cat > Config/BuildSettings.local.xcconfig <<EOF
-          SPARKLE_APPCAST_URL = $SPARKLE_APPCAST_URL
-          SPARKLE_PUBLIC_KEY = $SPARKLE_PUBLIC_KEY
-          EOF
-
       - name: Build app (iOS)
         run: |
           /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild build \
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4205ed8..ab33b0f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,18 +23,18 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
 
-      - name: Load Sparkle build settings
-        env:
-          SPARKLE_APPCAST_URL: ${{ vars.SPARKLE_APPCAST_URL }}
-          SPARKLE_PUBLIC_KEY: ${{ vars.SPARKLE_PUBLIC_KEY }}
+      - name: Load Sparkle configuration
         run: |
+          SPARKLE_APPCAST_URL="$(/usr/libexec/PlistBuddy -c 'Print :SUFeedURL' BitDream/Info.plist 2>/dev/null || true)"
+          SPARKLE_PUBLIC_KEY="$(/usr/libexec/PlistBuddy -c 'Print :SUPublicEDKey' BitDream/Info.plist 2>/dev/null || true)"
+
           if [[ -z "${SPARKLE_APPCAST_URL:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_APPCAST_URL"
+            echo "BitDream/Info.plist is missing SUFeedURL"
             exit 1
           fi
 
           if [[ -z "${SPARKLE_PUBLIC_KEY:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_PUBLIC_KEY"
+            echo "BitDream/Info.plist is missing SUPublicEDKey"
             exit 1
           fi
 
@@ -47,13 +47,6 @@ jobs:
           echo "SPARKLE_APPCAST_URL=$SPARKLE_APPCAST_URL" >> "$GITHUB_ENV"
           echo "SPARKLE_PUBLIC_KEY=$SPARKLE_PUBLIC_KEY" >> "$GITHUB_ENV"
 
-      - name: Write CI build settings override
-        run: |
-          cat > Config/BuildSettings.local.xcconfig <<EOF
-          SPARKLE_APPCAST_URL = $SPARKLE_APPCAST_URL
-          SPARKLE_PUBLIC_KEY = $SPARKLE_PUBLIC_KEY
-          EOF
-
       - name: Validate release version
         run: |
           BUILD_SETTINGS="$(
@@ -176,8 +169,6 @@ jobs:
             DEVELOPMENT_TEAM="${{ secrets.APPLE_TEAM_ID }}" \
             OTHER_CODE_SIGN_FLAGS="--keychain $KEYCHAIN_PATH" \
             CURRENT_PROJECT_VERSION="${RELEASE_TAG#v}" \
-            SPARKLE_APPCAST_URL="$SPARKLE_APPCAST_URL" \
-            SPARKLE_PUBLIC_KEY="$SPARKLE_PUBLIC_KEY" \
             ARCHS=arm64
 
       - name: Export archived app
@@ -423,11 +414,6 @@ jobs:
           DOWNLOAD_PREFIX="${REPOSITORY_URL}/releases/download/${RELEASE_TAG}/"
           RELEASE_LINK="${REPOSITORY_URL}/releases/tag/${RELEASE_TAG}"
 
-          if [[ -z "${SPARKLE_APPCAST_URL:-}" ]]; then
-            echo "Missing required repository variable: SPARKLE_APPCAST_URL"
-            exit 1
-          fi
-
           GENERATE_APPCAST="$(find "$HOME/Library/Developer/Xcode/DerivedData" -path '*/SourcePackages/artifacts/sparkle/Sparkle/bin/generate_appcast' -print -quit)"
           if [[ -z "${GENERATE_APPCAST}" ]]; then
             GENERATE_APPCAST="$(find "$HOME/Library/Developer/Xcode/DerivedData" -path '*/SourcePackages/checkouts/Sparkle/bin/generate_appcast' -print -quit)"
diff --git a/.gitignore b/.gitignore
index 06710e8..cc1ebea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,5 +20,5 @@ build/
 # macOS custom folder icon
 Icon[^a-zA-Z]
 
-# Local build setting overrides
+# Legacy local build setting overrides
 Config/BuildSettings.local.xcconfig
diff --git a/BitDream.xcodeproj/project.pbxproj b/BitDream.xcodeproj/project.pbxproj
index 6bf020b..03152b5 100644
--- a/BitDream.xcodeproj/project.pbxproj
+++ b/BitDream.xcodeproj/project.pbxproj
@@ -75,8 +75,6 @@
 		4BDACD162E73DB220074F714 /* WidgetKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = WidgetKit.framework; path = System/Library/Frameworks/WidgetKit.framework; sourceTree = SDKROOT; };
 		4BDACD182E73DB220074F714 /* SwiftUI.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SwiftUI.framework; path = System/Library/Frameworks/SwiftUI.framework; sourceTree = SDKROOT; };
 		4BDACD502E73DBBE0074F714 /* BitDream/Widgets/AppGroup.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BitDream/Widgets/AppGroup.swift; sourceTree = SOURCE_ROOT; };
-		4D2000013B10000000C3D4E5 /* BuildSettings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = BuildSettings.xcconfig; sourceTree = "<group>"; };
-		4D2000023B10000000C3D4E5 /* BuildSettings.example.local.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = BuildSettings.example.local.xcconfig; sourceTree = "<group>"; };
 		5A1000074100000000A1B2C3 /* BitDreamTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = BitDreamTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		6A2000014200000000B1C2D3 /* BitDream.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = BitDream.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6A20000E4200000000B1C2D3 /* BitDreamWidgetsExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = BitDreamWidgetsExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -194,7 +192,6 @@
 			isa = PBXGroup;
 			children = (
 				4B4E4C1A2E8A1F6E00418FD7 /* AppIcons */,
-				4D2000033B10000000C3D4E5 /* Config */,
 				4B1DADDD295E6C440037E9FB /* BitDream */,
 				5A10000A4100000000A1B2C3 /* BitDreamTests */,
 				4BDACD1A2E73DB220074F714 /* BitDreamWidgets */,
@@ -235,15 +232,6 @@
 			name = Frameworks;
 			sourceTree = "<group>";
 		};
-		4D2000033B10000000C3D4E5 /* Config */ = {
-			isa = PBXGroup;
-			children = (
-				4D2000013B10000000C3D4E5 /* BuildSettings.xcconfig */,
-				4D2000023B10000000C3D4E5 /* BuildSettings.example.local.xcconfig */,
-			);
-			path = Config;
-			sourceTree = "<group>";
-		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -610,7 +598,6 @@
 		};
 		4B1DADF0295E6C450037E9FB /* Debug configuration for PBXNativeTarget "BitDream" */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 4D2000013B10000000C3D4E5 /* BuildSettings.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = BitDreamAppIconDefault;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
@@ -657,7 +644,6 @@
 		};
 		4B1DADF1295E6C450037E9FB /* Release configuration for PBXNativeTarget "BitDream" */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 4D2000013B10000000C3D4E5 /* BuildSettings.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = BitDreamAppIconDefault;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
diff --git a/BitDream/Info.plist b/BitDream/Info.plist
index 56c6f9d..194f22a 100644
--- a/BitDream/Info.plist
+++ b/BitDream/Info.plist
@@ -49,9 +49,9 @@
 		<key>SUEnableAutomaticChecks</key>
 		<true/>
 		<key>SUFeedURL</key>
-		<string>$(SPARKLE_APPCAST_URL)</string>
+		<string>https://austin-smith.github.io/BitDream/appcast.xml</string>
 		<key>SUPublicEDKey</key>
-		<string>$(SPARKLE_PUBLIC_KEY)</string>
+		<string>+KG79p7oudH/MKhpfJ33550iZtqjQFKptFttQf1sGyI=</string>
 		<key>UTExportedTypeDeclarations</key>
 		<array>
 		<dict>
diff --git a/Config/BuildSettings.example.local.xcconfig b/Config/BuildSettings.example.local.xcconfig
deleted file mode 100644
index a4369d2..0000000
--- a/Config/BuildSettings.example.local.xcconfig
+++ /dev/null
@@ -1,3 +0,0 @@
-// Copy this file to Config/BuildSettings.local.xcconfig and customize locally.
-SPARKLE_APPCAST_URL = https:/$()/example.github.io/BitDream/appcast.xml
-SPARKLE_PUBLIC_KEY = REPLACE_WITH_YOUR_SPARKLE_PUBLIC_KEY
diff --git a/Config/BuildSettings.xcconfig b/Config/BuildSettings.xcconfig
deleted file mode 100644
index e7fc153..0000000
--- a/Config/BuildSettings.xcconfig
+++ /dev/null
@@ -1,9 +0,0 @@
-// Shared build settings layer for repo-wide configurable values.
-// Keep environment-specific values out of source-controlled project settings.
-SPARKLE_APPCAST_URL = __UNSET__
-SPARKLE_PUBLIC_KEY = __UNSET__
-
-// Required local/CI overrides.
-// Local development: create Config/BuildSettings.local.xcconfig.
-// CI: writes this file before build.
-#include "BuildSettings.local.xcconfig"
diff --git a/docs/build-settings.md b/docs/build-settings.md
deleted file mode 100644
index da564c1..0000000
--- a/docs/build-settings.md
+++ /dev/null
@@ -1,19 +0,0 @@
-# Build Settings Reference
-
-## Files
-- `Config/BuildSettings.xcconfig` (tracked): shared defaults and variable declarations.
-- `Config/BuildSettings.example.local.xcconfig` (tracked): template for local setup.
-- `Config/BuildSettings.local.xcconfig` (ignored): required local/CI overrides.
-
-These files configure the direct-download `BitDream` target. The
-`BitDreamAppStore` target neither reads Sparkle settings nor requires a local
-override file.
-
-## Local Setup
-1. Copy `Config/BuildSettings.example.local.xcconfig` to `Config/BuildSettings.local.xcconfig`.
-2. Set local values (currently `SPARKLE_APPCAST_URL` and `SPARKLE_PUBLIC_KEY`).
-
-## CI / Release
-- CI writes `Config/BuildSettings.local.xcconfig` before archive builds.
-- For Sparkle, release workflow uses repo variables `SPARKLE_APPCAST_URL` and `SPARKLE_PUBLIC_KEY`.
-- The Mac App Store build uses its dedicated Sparkle-free target and scheme.
diff --git a/docs/releases.md b/docs/releases.md
index fe5071c..9c3ae78 100644
--- a/docs/releases.md
+++ b/docs/releases.md
@@ -1,6 +1,6 @@
 # Creating a Release
 
-Set the app and widget `MARKETING_VERSION` to the same `major.minor.patch` value and merge the change into `main`. The local checkout must be clean, match `origin/main`, and have `Config/BuildSettings.local.xcconfig` configured.
+Set the app and widget `MARKETING_VERSION` to the same `major.minor.patch` value and merge the change into `main`. The local checkout must be clean and match `origin/main`.
 
 Run the preflight checks, then create a stable release tag:
 
@@ -11,7 +11,7 @@ Run the preflight checks, then create a stable release tag:
 
 Pushing the tag starts `.github/workflows/release.yml`, which builds, signs, notarizes, and publishes the macOS release. The workflow rejects tags that do not match the Xcode marketing version.
 
-See `docs/build-settings.md` and `docs/sparkle-updates.md` for configuration details.
+See `docs/sparkle-updates.md` for Sparkle configuration details.
 
 This workflow publishes the direct-download build. See
 `docs/mac-app-store.md` for the separate Mac App Store archive process.
diff --git a/docs/sparkle-updates.md b/docs/sparkle-updates.md
index fccf06d..40878bb 100644
--- a/docs/sparkle-updates.md
+++ b/docs/sparkle-updates.md
@@ -1,21 +1,17 @@
 # Sparkle Update Configuration
 
-## Required Variables
-- `SPARKLE_APPCAST_URL`: Sparkle feed URL.
-- `SPARKLE_PUBLIC_KEY`: Sparkle public key.
+## App Configuration
 
-## Build Contract
-- `INFOPLIST_KEY_SUFeedURL[sdk=macosx*]` resolves from `$(SPARKLE_APPCAST_URL)`.
-- `INFOPLIST_KEY_SUPublicEDKey[sdk=macosx*]` resolves from `$(SPARKLE_PUBLIC_KEY)`.
+`BitDream/Info.plist` contains the public Sparkle configuration:
 
-## Validation
-- `Config/BuildSettings.local.xcconfig` is required by `Config/BuildSettings.xcconfig`.
-- Local builds fail at config load time when the required local override file is missing.
-- CI validates `SPARKLE_APPCAST_URL` format and verifies embedded app `SUFeedURL` and `SUPublicEDKey` match expected values.
+- `SUFeedURL`: Sparkle feed URL.
+- `SUPublicEDKey`: Sparkle public EdDSA key.
 
-## Release Workflow Contract
-- GitHub repository variables: `SPARKLE_APPCAST_URL`, `SPARKLE_PUBLIC_KEY`.
-- Workflow injects Sparkle settings into:
-  - app archive build (`xcodebuild archive`)
-  - appcast generation/download steps
-- Workflow verifies embedded app values match `SPARKLE_APPCAST_URL` and `SPARKLE_PUBLIC_KEY`.
+Local, pull request, and release builds all use these tracked values. The
+release workflow verifies that the archived app contains the same values.
+
+## Release Signing
+
+The Sparkle private EdDSA key is stored in the GitHub Actions secret
+`SPARKLE_PRIVATE_KEY_BASE64`. The release workflow uses it to sign appcast
+entries. Never commit the private key.
diff --git a/scripts/tag-version.sh b/scripts/tag-version.sh
index e4284d2..c1149c7 100755
--- a/scripts/tag-version.sh
+++ b/scripts/tag-version.sh
@@ -64,12 +64,6 @@ if ! git remote get-url origin >/dev/null 2>&1; then
   exit 1
 fi
 
-if [[ ! -f Config/BuildSettings.local.xcconfig ]]; then
-  echo "Missing Config/BuildSettings.local.xcconfig." >&2
-  echo "Create it from Config/BuildSettings.example.local.xcconfig before tagging a release." >&2
-  exit 1
-fi
-
 echo "Fetching origin/main and release tags..."
 git fetch origin refs/heads/main:refs/remotes/origin/main --tags