Merge branch 'develop' into stable

35 files changed, 207 insertions, 131 deletions

diff --git a/README.md b/README.md
index ca3128e4..bc5da52e 100644
--- a/README.md
+++ b/README.md
@@ -167,4 +167,4 @@ SMAPI uses a small number of conditional compilation constants, which you can se
 flag | purpose
 ---- | -------
 `SMAPI_FOR_WINDOWS` | Indicates that SMAPI is being compiled on Windows for players on Windows. Set automatically in `crossplatform.targets`.
-`SMAPI_2_0` | Sets SMAPI 2.0 mode, which enables features planned for SMAPI 2.0 and removes all deprecated code. This helps test how mods will work when SMAPI 2.0 is released.
+`SMAPI_1_x` | Sets legacy SMAPI 1._x_ mode, disables SMAPI 2.0 features, and enables deprecated code. This will be removed when SMAPI 2.0 is released.
diff --git a/release-notes.md b/release-notes.md
index 6b860f4f..924ecb90 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -14,11 +14,19 @@ For mod developers:
 * In `manifest.json`:
   * Dependencies can now be optional.
   * The version can now be a string like `"1.0-alpha"` instead of a structure.
+  * The `Name`, `Version,` and `UniqueID` fields are no longer optional.
+  * The `UniqueID` field must now be unique (case-insensitive). If two installed mods have the same ID, SMAPI will show an error and load neither.
 * Removed all deprecated code.
 
-## 1.15
-See [log](https://github.com/Pathoschild/SMAPI/compare/1.14...1.15).
+## 1.15.1
+For players:
+* Fixed controller mod input broken in 1.15.
+* Fixed TrainerMod packaging unneeded files.
 
+For modders:
+* Fixed mod registry lookups by unique ID not being case-insensitive.
+
+## 1.15
 For players:
 * Cleaned up SMAPI console a bit.
 * Revamped TrainerMod's item commands:
diff --git a/src/GlobalAssemblyInfo.cs b/src/GlobalAssemblyInfo.cs
index d2f2597f..d9a01635 100644
--- a/src/GlobalAssemblyInfo.cs
+++ b/src/GlobalAssemblyInfo.cs
@@ -2,5 +2,5 @@
 using System.Runtime.InteropServices;
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("1.15.0.0")]
-[assembly: AssemblyFileVersion("1.15.0.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("1.15.1.0")]
+[assembly: AssemblyFileVersion("1.15.1.0")]
diff --git a/src/StardewModdingAPI.Tests/Core/ModResolverTests.cs b/src/StardewModdingAPI.Tests/Core/ModResolverTests.cs
index b451465e..eda3a425 100644
--- a/src/StardewModdingAPI.Tests/Core/ModResolverTests.cs
+++ b/src/StardewModdingAPI.Tests/Core/ModResolverTests.cs
@@ -126,7 +126,7 @@ namespace StardewModdingAPI.Tests.Core
         public void ValidateManifests_Skips_Failed()
         {
             // arrange
-            Mock<IModMetadata> mock = new Mock<IModMetadata>(MockBehavior.Strict);
+            Mock<IModMetadata> mock = this.GetMetadata("Mod A");
             mock.Setup(p => p.Status).Returns(ModMetadataStatus.Failed);
 
             // act
@@ -140,10 +140,8 @@ namespace StardewModdingAPI.Tests.Core
         public void ValidateManifests_ModCompatibility_AssumeBroken_Fails()
         {
             // arrange
-            Mock<IModMetadata> mock = new Mock<IModMetadata>(MockBehavior.Strict);
-            mock.Setup(p => p.Status).Returns(ModMetadataStatus.Found);
-            mock.Setup(p => p.Compatibility).Returns(new ModCompatibility { Compatibility = ModCompatibilityType.AssumeBroken });
-            mock.Setup(p => p.SetStatus(ModMetadataStatus.Failed, It.IsAny<string>())).Returns(() => mock.Object);
+            Mock<IModMetadata> mock = this.GetMetadata("Mod A", new string[0], allowStatusChange: true);
+            this.SetupMetadataForValidation(mock, new ModCompatibility { Compatibility = ModCompatibilityType.AssumeBroken });
 
             // act
             new ModResolver().ValidateManifests(new[] { mock.Object }, apiVersion: new SemanticVersion("1.0"));
@@ -156,11 +154,9 @@ namespace StardewModdingAPI.Tests.Core
         public void ValidateManifests_MinimumApiVersion_Fails()
         {
             // arrange
-            Mock<IModMetadata> mock = new Mock<IModMetadata>(MockBehavior.Strict);
-            mock.Setup(p => p.Status).Returns(ModMetadataStatus.Found);
-            mock.Setup(p => p.Compatibility).Returns(() => null);
+            Mock<IModMetadata> mock = this.GetMetadata("Mod A", new string[0], allowStatusChange: true);
             mock.Setup(p => p.Manifest).Returns(this.GetManifest(m => m.MinimumApiVersion = new SemanticVersion("1.1")));
-            mock.Setup(p => p.SetStatus(ModMetadataStatus.Failed, It.IsAny<string>())).Returns(() => mock.Object);
+            this.SetupMetadataForValidation(mock);
 
             // act
             new ModResolver().ValidateManifests(new[] { mock.Object }, apiVersion: new SemanticVersion("1.0"));
@@ -173,12 +169,8 @@ namespace StardewModdingAPI.Tests.Core
         public void ValidateManifests_MissingEntryDLL_Fails()
         {
             // arrange
-            Mock<IModMetadata> mock = new Mock<IModMetadata>(MockBehavior.Strict);
-            mock.Setup(p => p.Status).Returns(ModMetadataStatus.Found);
-            mock.Setup(p => p.Compatibility).Returns(() => null);
-            mock.Setup(p => p.Manifest).Returns(this.GetManifest());
-            mock.Setup(p => p.DirectoryPath).Returns(Path.GetTempPath());
-            mock.Setup(p => p.SetStatus(ModMetadataStatus.Failed, It.IsAny<string>())).Returns(() => mock.Object);
+            Mock<IModMetadata> mock = this.GetMetadata(this.GetManifest("Mod A", "1.0", manifest => manifest.EntryDll = "Missing.dll"), allowStatusChange: true);
+            this.SetupMetadataForValidation(mock);
 
             // act
             new ModResolver().ValidateManifests(new[] { mock.Object }, apiVersion: new SemanticVersion("1.0"));
@@ -187,6 +179,26 @@ namespace StardewModdingAPI.Tests.Core
             mock.Verify(p => p.SetStatus(ModMetadataStatus.Failed, It.IsAny<string>()), Times.Once, "The validation did not fail the metadata.");
         }
 
+#if !SMAPI_1_x
+        [Test(Description = "Assert that validation fails when multiple mods have the same unique ID.")]
+        public void ValidateManifests_DuplicateUniqueID_Fails()
+        {
+            // arrange
+            Mock<IModMetadata> modA = this.GetMetadata("Mod A", new string[0], allowStatusChange: true);
+            Mock<IModMetadata> modB = this.GetMetadata(this.GetManifest("Mod A", "1.0", manifest => manifest.Name = "Mod B"), allowStatusChange: true);
+            Mock<IModMetadata> modC = this.GetMetadata("Mod C", new string[0], allowStatusChange: false);
+            foreach (Mock<IModMetadata> mod in new[] { modA, modB, modC })
+                this.SetupMetadataForValidation(mod);
+
+            // act
+            new ModResolver().ValidateManifests(new[] { modA.Object, modB.Object }, apiVersion: new SemanticVersion("1.0"));
+
+            // assert
+            modA.Verify(p => p.SetStatus(ModMetadataStatus.Failed, It.IsAny<string>()), Times.Once, "The validation did not fail the first mod with a unique ID.");
+            modB.Verify(p => p.SetStatus(ModMetadataStatus.Failed, It.IsAny<string>()), Times.Once, "The validation did not fail the second mod with a unique ID.");
+        }
+#endif
+
         [Test(Description = "Assert that validation fails when the manifest references a DLL that does not exist.")]
         public void ValidateManifests_Valid_Passes()
         {
@@ -411,7 +423,7 @@ namespace StardewModdingAPI.Tests.Core
             Assert.AreSame(modB.Object, mods[1], "The load order is incorrect: mod B should be second since it needs mod A.");
         }
 
-#if SMAPI_2_0
+#if !SMAPI_1_x
         [Test(Description = "Assert that optional dependencies are sorted correctly if present.")]
         public void ProcessDependencies_IfOptional()
         {
@@ -469,8 +481,9 @@ namespace StardewModdingAPI.Tests.Core
         /// <summary>Get a randomised basic manifest.</summary>
         /// <param name="uniqueID">The mod's name and unique ID.</param>
         /// <param name="version">The mod version.</param>
+        /// <param name="adjust">Adjust the generated manifest.</param>
         /// <param name="dependencies">The dependencies this mod requires.</param>
-        private IManifest GetManifest(string uniqueID, string version, params IManifestDependency[] dependencies)
+        private IManifest GetManifest(string uniqueID, string version, Action<Manifest> adjust, params IManifestDependency[] dependencies)
         {
             return this.GetManifest(manifest =>
             {
@@ -478,11 +491,21 @@ namespace StardewModdingAPI.Tests.Core
                 manifest.UniqueID = uniqueID;
                 manifest.Version = new SemanticVersion(version);
                 manifest.Dependencies = dependencies;
+                adjust?.Invoke(manifest);
             });
         }
 
         /// <summary>Get a randomised basic manifest.</summary>
         /// <param name="uniqueID">The mod's name and unique ID.</param>
+        /// <param name="version">The mod version.</param>
+        /// <param name="dependencies">The dependencies this mod requires.</param>
+        private IManifest GetManifest(string uniqueID, string version, params IManifestDependency[] dependencies)
+        {
+            return this.GetManifest(uniqueID, version, null, dependencies);
+        }
+
+        /// <summary>Get a randomised basic manifest.</summary>
+        /// <param name="uniqueID">The mod's name and unique ID.</param>
         private Mock<IModMetadata> GetMetadata(string uniqueID)
         {
             return this.GetMetadata(this.GetManifest(uniqueID, "1.0"));
@@ -504,6 +527,7 @@ namespace StardewModdingAPI.Tests.Core
         private Mock<IModMetadata> GetMetadata(IManifest manifest, bool allowStatusChange = false)
         {
             Mock<IModMetadata> mod = new Mock<IModMetadata>(MockBehavior.Strict);
+            mod.Setup(p => p.Compatibility).Returns(() => null);
             mod.Setup(p => p.Status).Returns(ModMetadataStatus.Found);
             mod.Setup(p => p.DisplayName).Returns(manifest.UniqueID);
             mod.Setup(p => p.Manifest).Returns(manifest);
@@ -516,5 +540,17 @@ namespace StardewModdingAPI.Tests.Core
             }
             return mod;
         }
+
+        /// <summary>Set up a mock mod metadata for <see cref="ModResolver.ValidateManifests"/>.</summary>
+        /// <param name="mod">The mock mod metadata.</param>
+        /// <param name="compatibility">The compatibility record to set.</param>
+        private void SetupMetadataForValidation(Mock<IModMetadata> mod, ModCompatibility compatibility = null)
+        {
+            mod.Setup(p => p.Status).Returns(ModMetadataStatus.Found);
+            mod.Setup(p => p.Compatibility).Returns(() => null);
+            mod.Setup(p => p.Manifest).Returns(this.GetManifest());
+            mod.Setup(p => p.DirectoryPath).Returns(Path.GetTempPath());
+            mod.Setup(p => p.Compatibility).Returns(compatibility);
+        }
     }
 }
diff --git a/src/StardewModdingAPI/Command.cs b/src/StardewModdingAPI/Command.cs
index 689bb18b..76c85287 100644
--- a/src/StardewModdingAPI/Command.cs
+++ b/src/StardewModdingAPI/Command.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 using System.Collections.Generic;
 using StardewModdingAPI.Events;
diff --git a/src/StardewModdingAPI/Config.cs b/src/StardewModdingAPI/Config.cs
index e166f414..734c04e8 100644
--- a/src/StardewModdingAPI/Config.cs
+++ b/src/StardewModdingAPI/Config.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 using System.IO;
 using System.Linq;
diff --git a/src/StardewModdingAPI/Constants.cs b/src/StardewModdingAPI/Constants.cs
index 586cadeb..3bd31c2d 100644
--- a/src/StardewModdingAPI/Constants.cs
+++ b/src/StardewModdingAPI/Constants.cs
@@ -34,10 +34,10 @@ namespace StardewModdingAPI
         ****/
         /// <summary>SMAPI's current semantic version.</summary>
         public static ISemanticVersion ApiVersion { get; } =
-#if SMAPI_2_0
-            new SemanticVersion(2, 0, 0, $"alpha-{DateTime.UtcNow:yyyyMMddHHmm}");
+#if SMAPI_1_x
+            new SemanticVersion(1, 15, 1); // alpha-{DateTime.UtcNow:yyyyMMddHHmm}
 #else
-            new SemanticVersion(1, 15, 0); // alpha-{DateTime.UtcNow:yyyyMMddHHmm}
+            new SemanticVersion(2, 0, 0, $"alpha-{DateTime.UtcNow:yyyyMMddHHmm}");
 #endif
 
         /// <summary>The minimum supported version of Stardew Valley.</summary>
@@ -175,7 +175,7 @@ namespace StardewModdingAPI
                 new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPreRenderGuiEventNoCheck"),
 
                 // APIs removed in SMAPI 2.0
-#if SMAPI_2_0
+#if !SMAPI_1_x
                 new TypeFinder("StardewModdingAPI.Command"),
                 new TypeFinder("StardewModdingAPI.Config"),
                 new TypeFinder("StardewModdingAPI.Log"),
diff --git a/src/StardewModdingAPI/Events/EventArgsCommand.cs b/src/StardewModdingAPI/Events/EventArgsCommand.cs
index f0435904..35370139 100644
--- a/src/StardewModdingAPI/Events/EventArgsCommand.cs
+++ b/src/StardewModdingAPI/Events/EventArgsCommand.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 
 namespace StardewModdingAPI.Events
diff --git a/src/StardewModdingAPI/Events/EventArgsFarmerChanged.cs b/src/StardewModdingAPI/Events/EventArgsFarmerChanged.cs
index c34fc4ab..4c359939 100644
--- a/src/StardewModdingAPI/Events/EventArgsFarmerChanged.cs
+++ b/src/StardewModdingAPI/Events/EventArgsFarmerChanged.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 using SFarmer = StardewValley.Farmer;
 
diff --git a/src/StardewModdingAPI/Events/EventArgsInput.cs b/src/StardewModdingAPI/Events/EventArgsInput.cs
index e5eb7372..31368555 100644
--- a/src/StardewModdingAPI/Events/EventArgsInput.cs
+++ b/src/StardewModdingAPI/Events/EventArgsInput.cs
@@ -1,4 +1,4 @@
-#if SMAPI_2_0
+#if !SMAPI_1_x
 using System;
 using System.Linq;
 using Microsoft.Xna.Framework;
diff --git a/src/StardewModdingAPI/Events/EventArgsLoadedGameChanged.cs b/src/StardewModdingAPI/Events/EventArgsLoadedGameChanged.cs
index d6fc4594..688b4b3d 100644
--- a/src/StardewModdingAPI/Events/EventArgsLoadedGameChanged.cs
+++ b/src/StardewModdingAPI/Events/EventArgsLoadedGameChanged.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 
 namespace StardewModdingAPI.Events
diff --git a/src/StardewModdingAPI/Events/EventArgsNewDay.cs b/src/StardewModdingAPI/Events/EventArgsNewDay.cs
index 5bd2ba66..b8cbe9e3 100644
--- a/src/StardewModdingAPI/Events/EventArgsNewDay.cs
+++ b/src/StardewModdingAPI/Events/EventArgsNewDay.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 
 namespace StardewModdingAPI.Events
diff --git a/src/StardewModdingAPI/Events/EventArgsStringChanged.cs b/src/StardewModdingAPI/Events/EventArgsStringChanged.cs
index 1498cb71..f580a2ce 100644
--- a/src/StardewModdingAPI/Events/EventArgsStringChanged.cs
+++ b/src/StardewModdingAPI/Events/EventArgsStringChanged.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 
 namespace StardewModdingAPI.Events
diff --git a/src/StardewModdingAPI/Events/GameEvents.cs b/src/StardewModdingAPI/Events/GameEvents.cs
index 557b451f..5610e67a 100644
--- a/src/StardewModdingAPI/Events/GameEvents.cs
+++ b/src/StardewModdingAPI/Events/GameEvents.cs
@@ -11,7 +11,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Properties
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Manages deprecation warnings.</summary>
         private static DeprecationManager DeprecationManager;
 
@@ -42,7 +42,7 @@ namespace StardewModdingAPI.Events
         /// <summary>Raised during launch after configuring Stardew Valley, loading it into memory, and opening the game window. The window is still blank by this point.</summary>
         internal static event EventHandler GameLoadedInternal;
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Raised during launch after configuring XNA or MonoGame. The game window hasn't been opened by this point. Called after <see cref="Microsoft.Xna.Framework.Game.Initialize"/>.</summary>
         [Obsolete("The " + nameof(Mod) + "." + nameof(Mod.Entry) + " method is now called after the " + nameof(GameEvents.Initialize) + " event, so any contained logic can be done directly in " + nameof(Mod.Entry) + ".")]
         public static event EventHandler Initialize
@@ -117,7 +117,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Internal methods
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Injects types required for backwards compatibility.</summary>
         /// <param name="deprecationManager">Manages deprecation warnings.</param>
         internal static void Shim(DeprecationManager deprecationManager)
@@ -126,17 +126,17 @@ namespace StardewModdingAPI.Events
         }
 #endif
 
-    /// <summary>Raise an <see cref="InitializeInternal"/> event.</summary>
-    /// <param name="monitor">Encapsulates logging and monitoring.</param>
-    internal static void InvokeInitialize(IMonitor monitor)
+        /// <summary>Raise an <see cref="InitializeInternal"/> event.</summary>
+        /// <param name="monitor">Encapsulates logging and monitoring.</param>
+        internal static void InvokeInitialize(IMonitor monitor)
         {
             monitor.SafelyRaisePlainEvent($"{nameof(GameEvents)}.{nameof(GameEvents.InitializeInternal)}", GameEvents.InitializeInternal?.GetInvocationList());
-#if !SMAPI_2_0
+#if SMAPI_1_x
             monitor.SafelyRaisePlainEvent($"{nameof(GameEvents)}.{nameof(GameEvents.Initialize)}", GameEvents._Initialize?.GetInvocationList());
 #endif
         }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Raise a <see cref="LoadContent"/> event.</summary>
         /// <param name="monitor">Encapsulates logging and monitoring.</param>
         internal static void InvokeLoadContent(IMonitor monitor)
@@ -150,12 +150,12 @@ namespace StardewModdingAPI.Events
         internal static void InvokeGameLoaded(IMonitor monitor)
         {
             monitor.SafelyRaisePlainEvent($"{nameof(GameEvents)}.{nameof(GameEvents.GameLoadedInternal)}", GameEvents.GameLoadedInternal?.GetInvocationList());
-#if !SMAPI_2_0
+#if SMAPI_1_x
             monitor.SafelyRaisePlainEvent($"{nameof(GameEvents)}.{nameof(GameEvents.GameLoaded)}", GameEvents._GameLoaded?.GetInvocationList());
 #endif
         }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Raise a <see cref="FirstUpdateTick"/> event.</summary>
         /// <param name="monitor">Encapsulates monitoring and logging.</param>
         internal static void InvokeFirstUpdateTick(IMonitor monitor)
diff --git a/src/StardewModdingAPI/Events/InputEvents.cs b/src/StardewModdingAPI/Events/InputEvents.cs
index 285487af..b99b49e0 100644
--- a/src/StardewModdingAPI/Events/InputEvents.cs
+++ b/src/StardewModdingAPI/Events/InputEvents.cs
@@ -1,4 +1,4 @@
-#if SMAPI_2_0
+#if !SMAPI_1_x
 using System;
 using StardewModdingAPI.Framework;
 using StardewModdingAPI.Utilities;
diff --git a/src/StardewModdingAPI/Events/PlayerEvents.cs b/src/StardewModdingAPI/Events/PlayerEvents.cs
index acbdc562..72826330 100644
--- a/src/StardewModdingAPI/Events/PlayerEvents.cs
+++ b/src/StardewModdingAPI/Events/PlayerEvents.cs
@@ -15,7 +15,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Properties
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Manages deprecation warnings.</summary>
         private static DeprecationManager DeprecationManager;
 
@@ -32,7 +32,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Events
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Raised after the player loads a saved game.</summary>
         [Obsolete("Use " + nameof(SaveEvents) + "." + nameof(SaveEvents.AfterLoad) + " instead")]
         public static event EventHandler<EventArgsLoadedGameChanged> LoadedGame
@@ -68,7 +68,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Internal methods
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Injects types required for backwards compatibility.</summary>
         /// <param name="deprecationManager">Manages deprecation warnings.</param>
         internal static void Shim(DeprecationManager deprecationManager)
diff --git a/src/StardewModdingAPI/Events/TimeEvents.cs b/src/StardewModdingAPI/Events/TimeEvents.cs
index f0fdb4f2..d5ab9fb7 100644
--- a/src/StardewModdingAPI/Events/TimeEvents.cs
+++ b/src/StardewModdingAPI/Events/TimeEvents.cs
@@ -11,7 +11,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Properties
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Manages deprecation warnings.</summary>
         private static DeprecationManager DeprecationManager;
 
@@ -42,7 +42,7 @@ namespace StardewModdingAPI.Events
         /// <summary>Raised after the in-game clock changes.</summary>
         public static event EventHandler<EventArgsIntChanged> TimeOfDayChanged;
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Raised after the day-of-month value changes, including when loading a save. This may happen before save; in most cases you should use <see cref="AfterDayStarted"/> instead.</summary>
         [Obsolete("Use " + nameof(TimeEvents) + "." + nameof(TimeEvents.AfterDayStarted) + " or " + nameof(SaveEvents) + " instead")]
         public static event EventHandler<EventArgsIntChanged> DayOfMonthChanged
@@ -96,7 +96,7 @@ namespace StardewModdingAPI.Events
         /*********
         ** Internal methods
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Injects types required for backwards compatibility.</summary>
         /// <param name="deprecationManager">Manages deprecation warnings.</param>
         internal static void Shim(DeprecationManager deprecationManager)
@@ -121,7 +121,7 @@ namespace StardewModdingAPI.Events
             monitor.SafelyRaiseGenericEvent($"{nameof(TimeEvents)}.{nameof(TimeEvents.TimeOfDayChanged)}", TimeEvents.TimeOfDayChanged?.GetInvocationList(), null, new EventArgsIntChanged(priorTime, newTime));
         }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Raise a <see cref="DayOfMonthChanged"/> event.</summary>
         /// <param name="monitor">Encapsulates monitoring and logging.</param>
         /// <param name="priorDay">The previous day value.</param>
diff --git a/src/StardewModdingAPI/Framework/CursorPosition.cs b/src/StardewModdingAPI/Framework/CursorPosition.cs
index 4f256da5..0fb2309b 100644
--- a/src/StardewModdingAPI/Framework/CursorPosition.cs
+++ b/src/StardewModdingAPI/Framework/CursorPosition.cs
@@ -1,4 +1,4 @@
-#if SMAPI_2_0
+#if !SMAPI_1_x
 using Microsoft.Xna.Framework;
 
 namespace StardewModdingAPI.Framework
diff --git a/src/StardewModdingAPI/Framework/DeprecationManager.cs b/src/StardewModdingAPI/Framework/DeprecationManager.cs
index 153d8829..43e82d74 100644
--- a/src/StardewModdingAPI/Framework/DeprecationManager.cs
+++ b/src/StardewModdingAPI/Framework/DeprecationManager.cs
@@ -54,7 +54,7 @@ namespace StardewModdingAPI.Framework
 
             // show SMAPI 2.0 meta-warning
             if(this.MarkWarned("SMAPI", "SMAPI 2.0 meta-warning", "2.0"))
-                this.Monitor.Log("Some mods may stop working in SMAPI 2.0 (but they'll work fine for now). Try updating mods with 'deprecated code' warnings; if that doesn't remove the warnings, let the mod authors know about this message or see http://community.playstarbound.com/threads/135000 for details.", LogLevel.Warn);
+                this.Monitor.Log("Some mods may stop working in SMAPI 2.0 (but they'll work fine for now). Try updating mods with 'deprecated code' warnings; if that doesn't remove the warnings, let the mod authors know about this message or see http://stardewvalleywiki.com/Modding:SMAPI_2.0 for details.", LogLevel.Warn);
 
             // build message
             string message = $"{source ?? "An unknown mod"} uses deprecated code ({nounPhrase}).";
diff --git a/src/StardewModdingAPI/Framework/ModLoading/ModResolver.cs b/src/StardewModdingAPI/Framework/ModLoading/ModResolver.cs
index 38dddce7..b75453b7 100644
--- a/src/StardewModdingAPI/Framework/ModLoading/ModResolver.cs
+++ b/src/StardewModdingAPI/Framework/ModLoading/ModResolver.cs
@@ -95,6 +95,9 @@ namespace StardewModdingAPI.Framework.ModLoading
         /// <param name="apiVersion">The current SMAPI version.</param>
         public void ValidateManifests(IEnumerable<IModMetadata> mods, ISemanticVersion apiVersion)
         {
+            mods = mods.ToArray();
+
+            // validate each manifest
             foreach (IModMetadata mod in mods)
             {
                 // skip if already failed
@@ -137,7 +140,7 @@ namespace StardewModdingAPI.Framework.ModLoading
                 }
 
                 // validate required fields
-#if SMAPI_2_0
+#if !SMAPI_1_x
                 {
                     List<string> missingFields = new List<string>(3);
 
@@ -153,6 +156,24 @@ namespace StardewModdingAPI.Framework.ModLoading
                 }
 #endif
             }
+
+            // validate IDs are unique
+#if !SMAPI_1_x
+            {
+                var duplicatesByID = mods
+                    .GroupBy(mod => mod.Manifest.UniqueID?.Trim(), mod => mod, StringComparer.InvariantCultureIgnoreCase)
+                    .Where(p => p.Count() > 1);
+                foreach (var group in duplicatesByID)
+                {
+                    foreach (IModMetadata mod in group)
+                    {
+                        if (mod.Status == ModMetadataStatus.Failed)
+                            continue; // don't replace metadata error
+                        mod.SetStatus(ModMetadataStatus.Failed, $"its unique ID '{mod.Manifest.UniqueID}' is used by multiple mods ({string.Join(", ", group.Select(p => p.DisplayName))}).");
+                    }
+                }
+            }
+#endif
         }
 
         /// <summary>Sort the given mods by the order they should be loaded.</summary>
@@ -234,10 +255,10 @@ namespace StardewModdingAPI.Framework.ModLoading
                         MinVersion = entry.MinimumVersion,
                         Mod = dependencyMod,
                         IsRequired =
-#if SMAPI_2_0
-                            entry.IsRequired
-#else
+#if SMAPI_1_x
                             true
+#else
+                        entry.IsRequired
 #endif
                     }
                 )
diff --git a/src/StardewModdingAPI/Framework/ModRegistry.cs b/src/StardewModdingAPI/Framework/ModRegistry.cs
index a427bdb7..8f30d813 100644
--- a/src/StardewModdingAPI/Framework/ModRegistry.cs
+++ b/src/StardewModdingAPI/Framework/ModRegistry.cs
@@ -36,14 +36,24 @@ namespace StardewModdingAPI.Framework
         /// <returns>Returns the matching mod's metadata, or <c>null</c> if not found.</returns>
         public IManifest Get(string uniqueID)
         {
-            return this.GetAll().FirstOrDefault(p => p.UniqueID == uniqueID);
+            // normalise search ID
+            if (string.IsNullOrWhiteSpace(uniqueID))
+                return null;
+            uniqueID = uniqueID.Trim();
+
+            // find match
+            return this.GetAll().FirstOrDefault(p =>
+#if SMAPI_1_x
+            p.UniqueID != null &&
+#endif
+            p.UniqueID.Trim().Equals(uniqueID, StringComparison.InvariantCultureIgnoreCase));
         }
 
         /// <summary>Get whether a mod has been loaded.</summary>
         /// <param name="uniqueID">The mod's unique ID.</param>
         public bool IsLoaded(string uniqueID)
         {
-            return this.GetAll().Any(p => p.UniqueID == uniqueID);
+            return this.Get(uniqueID) != null;
         }
 
         /****
diff --git a/src/StardewModdingAPI/Framework/Models/Manifest.cs b/src/StardewModdingAPI/Framework/Models/Manifest.cs
index 08b88025..1b5c2646 100644
--- a/src/StardewModdingAPI/Framework/Models/Manifest.cs
+++ b/src/StardewModdingAPI/Framework/Models/Manifest.cs
@@ -38,7 +38,7 @@ namespace StardewModdingAPI.Framework.Models
         /// <summary>The unique mod ID.</summary>
         public string UniqueID { get; set; }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Whether the mod uses per-save config files.</summary>
         [Obsolete("Use " + nameof(Mod) + "." + nameof(Mod.Helper) + "." + nameof(IModHelper.ReadConfig) + " instead")]
         public bool PerSaveConfigs { get; set; }
diff --git a/src/StardewModdingAPI/Framework/Models/ManifestDependency.cs b/src/StardewModdingAPI/Framework/Models/ManifestDependency.cs
index 25d92a29..67f906e3 100644
--- a/src/StardewModdingAPI/Framework/Models/ManifestDependency.cs
+++ b/src/StardewModdingAPI/Framework/Models/ManifestDependency.cs
@@ -12,7 +12,7 @@
         /// <summary>The minimum required version (if any).</summary>
         public ISemanticVersion MinimumVersion { get; set; }
 
-#if SMAPI_2_0
+#if !SMAPI_1_x
         /// <summary>Whether the dependency must be installed to use the mod.</summary>
         public bool IsRequired { get; set; }
 #endif
@@ -25,7 +25,7 @@
         /// <param name="minimumVersion">The minimum required version (if any).</param>
         /// <param name="required">Whether the dependency must be installed to use the mod.</param>
         public ManifestDependency(string uniqueID, string minimumVersion
-#if SMAPI_2_0
+#if !SMAPI_1_x
             , bool required = true
 #endif
             )
@@ -34,7 +34,7 @@
             this.MinimumVersion = !string.IsNullOrWhiteSpace(minimumVersion)
                 ? new SemanticVersion(minimumVersion)
                 : null;
-#if SMAPI_2_0
+#if !SMAPI_1_x
             this.IsRequired = required;
 #endif
         }
diff --git a/src/StardewModdingAPI/Framework/Monitor.cs b/src/StardewModdingAPI/Framework/Monitor.cs
index 6359b454..5ae24a73 100644
--- a/src/StardewModdingAPI/Framework/Monitor.cs
+++ b/src/StardewModdingAPI/Framework/Monitor.cs
@@ -45,7 +45,7 @@ namespace StardewModdingAPI.Framework
         /// <summary>Whether SMAPI is aborting. Mods don't need to worry about this unless they have background tasks.</summary>
         public bool IsExiting => this.ExitTokenSource.IsCancellationRequested;
 
-#if SMAPI_2_0
+#if !SMAPI_1_x
         /// <summary>Whether to show the full log stamps (with time/level/logger) in the console. If false, shows a simplified stamp with only the logger.</summary>
         internal bool ShowFullStampInConsole { get; set; }
 #endif
@@ -97,7 +97,7 @@ namespace StardewModdingAPI.Framework
             this.ExitTokenSource.Cancel();
         }
 
-#if SMAPI_2_0
+#if !SMAPI_1_x
         /// <summary>Write a newline to the console and log file.</summary>
         internal void Newline()
         {
@@ -108,7 +108,7 @@ namespace StardewModdingAPI.Framework
         }
 #endif
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Log a message for the player or developer, using the specified console color.</summary>
         /// <param name="source">The name of the mod logging the message.</param>
         /// <param name="message">The message to log.</param>
@@ -144,7 +144,7 @@ namespace StardewModdingAPI.Framework
             string levelStr = level.ToString().ToUpper().PadRight(Monitor.MaxLevelLength);
 
             string fullMessage = $"[{DateTime.Now:HH:mm:ss} {levelStr} {source}] {message}";
-#if SMAPI_2_0
+#if !SMAPI_1_x
             string consoleMessage = this.ShowFullStampInConsole ? fullMessage : $"[{source}] {message}";
 #else
             string consoleMessage = fullMessage;
diff --git a/src/StardewModdingAPI/Framework/SGame.cs b/src/StardewModdingAPI/Framework/SGame.cs
index c7784c60..d6f1a05b 100644
--- a/src/StardewModdingAPI/Framework/SGame.cs
+++ b/src/StardewModdingAPI/Framework/SGame.cs
@@ -118,7 +118,7 @@ namespace StardewModdingAPI.Framework
         /// <summary>The time of day (in 24-hour military format) at last check.</summary>
         private int PreviousTime;
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>The day of month (1–28) at last check.</summary>
         private int PreviousDay;
 
@@ -292,7 +292,7 @@ namespace StardewModdingAPI.Framework
                 if (this.FirstUpdate)
                 {
                     GameEvents.InvokeInitialize(this.Monitor);
-#if !SMAPI_2_0
+#if SMAPI_1_x
                     GameEvents.InvokeLoadContent(this.Monitor);
 #endif
                     GameEvents.InvokeGameLoaded(this.Monitor);
@@ -324,7 +324,7 @@ namespace StardewModdingAPI.Framework
                         Context.IsWorldReady = true;
 
                         SaveEvents.InvokeAfterLoad(this.Monitor);
-#if !SMAPI_2_0
+#if SMAPI_1_x
                         PlayerEvents.InvokeLoadedGame(this.Monitor, new EventArgsLoadedGameChanged(Game1.hasLoadedGame));
 #endif
                         TimeEvents.InvokeAfterDayStarted(this.Monitor);
@@ -382,7 +382,7 @@ namespace StardewModdingAPI.Framework
                     bool isClick = framePressedKeys.Contains(SButton.MouseLeft) || (framePressedKeys.Contains(SButton.ControllerA) && !currentlyPressedKeys.Contains(SButton.ControllerX));
 
                     // get cursor position
-#if SMAPI_2_0
+#if !SMAPI_1_x
                     ICursorPosition cursor;
                     {
                         // cursor position
@@ -398,7 +398,7 @@ namespace StardewModdingAPI.Framework
                     // raise button pressed
                     foreach (SButton button in framePressedKeys)
                     {
-#if SMAPI_2_0
+#if !SMAPI_1_x
                         InputEvents.InvokeButtonPressed(this.Monitor, button, cursor, isClick);
 #endif
 
@@ -420,7 +420,7 @@ namespace StardewModdingAPI.Framework
                     // raise button released
                     foreach (SButton button in frameReleasedKeys)
                     {
-#if SMAPI_2_0
+#if !SMAPI_1_x
                         bool wasClick =
                             (button == SButton.MouseLeft && previousPressedKeys.Contains(SButton.MouseLeft)) // released left click
                             || (button == SButton.ControllerA && previousPressedKeys.Contains(SButton.ControllerA) && !previousPressedKeys.Contains(SButton.ControllerX));
@@ -503,7 +503,7 @@ namespace StardewModdingAPI.Framework
                     if (this.GetHash(Game1.locations) != this.PreviousGameLocations)
                         LocationEvents.InvokeLocationsChanged(this.Monitor, Game1.locations);
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
                     // raise player changed
                     if (Game1.player != this.PreviousFarmer)
                         PlayerEvents.InvokeFarmerChanged(this.Monitor, this.PreviousFarmer, Game1.player);
@@ -538,7 +538,7 @@ namespace StardewModdingAPI.Framework
                         // raise time changed
                         if (Game1.timeOfDay != this.PreviousTime)
                             TimeEvents.InvokeTimeOfDayChanged(this.Monitor, this.PreviousTime, Game1.timeOfDay);
-#if !SMAPI_2_0
+#if SMAPI_1_x
                         if (Game1.dayOfMonth != this.PreviousDay)
                             TimeEvents.InvokeDayOfMonthChanged(this.Monitor, this.PreviousDay, Game1.dayOfMonth);
                         if (Game1.currentSeason != this.PreviousSeason)
@@ -566,7 +566,7 @@ namespace StardewModdingAPI.Framework
                     this.PreviousTime = Game1.timeOfDay;
                     this.PreviousMineLevel = Game1.mine?.mineLevel ?? 0;
                     this.PreviousSaveID = Game1.uniqueIDForThisGame;
-#if !SMAPI_2_0
+#if SMAPI_1_x
                     this.PreviousFarmer = Game1.player;
                     this.PreviousDay = Game1.dayOfMonth;
                     this.PreviousSeason = Game1.currentSeason;
@@ -577,7 +577,7 @@ namespace StardewModdingAPI.Framework
                 /*********
                 ** Game day transition event (obsolete)
                 *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
                 if (Game1.newDay != this.PreviousIsNewDay)
                 {
                     TimeEvents.InvokeOnNewDay(this.Monitor, this.PreviousDay, Game1.dayOfMonth, Game1.newDay);
@@ -603,7 +603,7 @@ namespace StardewModdingAPI.Framework
                 GameEvents.InvokeUpdateTick(this.Monitor);
                 if (this.FirstUpdate)
                 {
-#if !SMAPI_2_0
+#if SMAPI_1_x
                     GameEvents.InvokeFirstUpdateTick(this.Monitor);
 #endif
                     this.FirstUpdate = false;
diff --git a/src/StardewModdingAPI/Framework/Serialisation/ManifestFieldConverter.cs b/src/StardewModdingAPI/Framework/Serialisation/ManifestFieldConverter.cs
index 5be0f0b6..6947311b 100644
--- a/src/StardewModdingAPI/Framework/Serialisation/ManifestFieldConverter.cs
+++ b/src/StardewModdingAPI/Framework/Serialisation/ManifestFieldConverter.cs
@@ -73,11 +73,11 @@ namespace StardewModdingAPI.Framework.Serialisation
                 {
                     string uniqueID = obj.Value<string>(nameof(IManifestDependency.UniqueID));
                     string minVersion = obj.Value<string>(nameof(IManifestDependency.MinimumVersion));
-#if SMAPI_2_0
+#if SMAPI_1_x
+                    result.Add(new ManifestDependency(uniqueID, minVersion));
+#else
                     bool required = obj.Value<bool?>(nameof(IManifestDependency.IsRequired)) ?? true;
                     result.Add(new ManifestDependency(uniqueID, minVersion, required));
-#else
-                    result.Add(new ManifestDependency(uniqueID, minVersion));
 #endif
                 }
                 return result.ToArray();
diff --git a/src/StardewModdingAPI/ICursorPosition.cs b/src/StardewModdingAPI/ICursorPosition.cs
index d03cda71..8fbc115f 100644
--- a/src/StardewModdingAPI/ICursorPosition.cs
+++ b/src/StardewModdingAPI/ICursorPosition.cs
@@ -1,4 +1,4 @@
-#if SMAPI_2_0
+#if !SMAPI_1_x
 using Microsoft.Xna.Framework;
 
 namespace StardewModdingAPI
diff --git a/src/StardewModdingAPI/IManifestDependency.cs b/src/StardewModdingAPI/IManifestDependency.cs
index 027c1d59..1fa6c812 100644
--- a/src/StardewModdingAPI/IManifestDependency.cs
+++ b/src/StardewModdingAPI/IManifestDependency.cs
@@ -12,7 +12,7 @@
         /// <summary>The minimum required version (if any).</summary>
         ISemanticVersion MinimumVersion { get; }
 
-#if SMAPI_2_0
+#if !SMAPI_1_x
         /// <summary>Whether the dependency must be installed to use the mod.</summary>
         bool IsRequired { get; }
 #endif
diff --git a/src/StardewModdingAPI/Log.cs b/src/StardewModdingAPI/Log.cs
index 46f1caae..60220ad8 100644
--- a/src/StardewModdingAPI/Log.cs
+++ b/src/StardewModdingAPI/Log.cs
@@ -1,4 +1,4 @@
-#if !SMAPI_2_0
+#if SMAPI_1_x
 using System;
 using System.Threading;
 using StardewModdingAPI.Framework;
diff --git a/src/StardewModdingAPI/Mod.cs b/src/StardewModdingAPI/Mod.cs
index cb36c596..b5607234 100644
--- a/src/StardewModdingAPI/Mod.cs
+++ b/src/StardewModdingAPI/Mod.cs
@@ -11,7 +11,7 @@ namespace StardewModdingAPI
         /*********
         ** Properties
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Manages deprecation warnings.</summary>
         private static DeprecationManager DeprecationManager;
 
@@ -33,7 +33,7 @@ namespace StardewModdingAPI
         /// <summary>The mod's manifest.</summary>
         public IManifest ModManifest { get; internal set; }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>The full path to the mod's directory on the disk.</summary>
         [Obsolete("Use " + nameof(Mod.Helper) + "." + nameof(IModHelper.DirectoryPath) + " instead")]
         public string PathOnDisk
@@ -79,7 +79,7 @@ namespace StardewModdingAPI
         /*********
         ** Public methods
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Injects types required for backwards compatibility.</summary>
         /// <param name="deprecationManager">Manages deprecation warnings.</param>
         internal static void Shim(DeprecationManager deprecationManager)
@@ -108,7 +108,7 @@ namespace StardewModdingAPI
         /*********
         ** Private methods
         *********/
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Get the full path to the per-save configuration file for the current save (if <see cref="Manifest.PerSaveConfigs"/> is <c>true</c>).</summary>
         [Obsolete]
         private string GetPerSaveConfigFolder()
diff --git a/src/StardewModdingAPI/Program.cs b/src/StardewModdingAPI/Program.cs
index 97e18322..08bd2b84 100644
--- a/src/StardewModdingAPI/Program.cs
+++ b/src/StardewModdingAPI/Program.cs
@@ -127,7 +127,7 @@ namespace StardewModdingAPI
                 // init logging
                 this.Monitor.Log($"SMAPI {Constants.ApiVersion} with Stardew Valley {Constants.GetGameDisplayVersion(Constants.GameVersion)} on {this.GetFriendlyPlatformName()}", LogLevel.Info);
                 this.Monitor.Log($"Mods go here: {Constants.ModPath}");
-#if !SMAPI_2_0
+#if SMAPI_1_x
                 this.Monitor.Log("Preparing SMAPI...");
 #endif
 
@@ -213,10 +213,10 @@ namespace StardewModdingAPI
             }
 
             // start game
-#if SMAPI_2_0
-            this.Monitor.Log("Starting game...", LogLevel.Trace);
-#else
+#if SMAPI_1_x
             this.Monitor.Log("Starting game...");
+#else
+            this.Monitor.Log("Starting game...", LogLevel.Trace);
 #endif
             try
             {
@@ -234,7 +234,7 @@ namespace StardewModdingAPI
             }
         }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <summary>Get a monitor for legacy code which doesn't have one passed in.</summary>
         [Obsolete("This method should only be used when needed for backwards compatibility.")]
         internal IMonitor GetLegacyMonitorForMod()
@@ -333,7 +333,7 @@ namespace StardewModdingAPI
             this.DeprecationManager = new DeprecationManager(this.Monitor, this.ModRegistry);
             this.CommandManager = new CommandManager();
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
             // inject compatibility shims
 #pragma warning disable 618
             Command.Shim(this.CommandManager, this.DeprecationManager, this.ModRegistry);
@@ -357,7 +357,7 @@ namespace StardewModdingAPI
             if (this.Settings.DeveloperMode)
             {
                 this.Monitor.ShowTraceInConsole = true;
-#if SMAPI_2_0
+#if !SMAPI_1_x
                 this.Monitor.ShowFullStampInConsole = true;
 #endif
                 this.Monitor.Log($"You configured SMAPI to run in developer mode. The console may be much more verbose. You can disable developer mode by installing the non-developer version of SMAPI, or by editing {Constants.ApiConfigPath}.", LogLevel.Info);
@@ -375,10 +375,10 @@ namespace StardewModdingAPI
 
             // load mods
             {
-#if SMAPI_2_0
-                this.Monitor.Log("Loading mod metadata...", LogLevel.Trace);
-#else
+#if SMAPI_1_x
                 this.Monitor.Log("Loading mod metadata...");
+#else
+                this.Monitor.Log("Loading mod metadata...", LogLevel.Trace);
 #endif
                 ModResolver resolver = new ModResolver();
 
@@ -387,7 +387,7 @@ namespace StardewModdingAPI
                 resolver.ValidateManifests(mods, Constants.ApiVersion);
 
                 // check for deprecated metadata
-#if !SMAPI_2_0
+#if SMAPI_1_x
                 IList<Action> deprecationWarnings = new List<Action>();
                 foreach (IModMetadata mod in mods.Where(m => m.Status != ModMetadataStatus.Failed))
                 {
@@ -429,12 +429,12 @@ namespace StardewModdingAPI
                 mods = resolver.ProcessDependencies(mods).ToArray();
 
                 // load mods
-#if SMAPI_2_0
-                this.LoadMods(mods, new JsonHelper(), this.ContentManager);
-#else
+#if SMAPI_1_x
                 this.LoadMods(mods, new JsonHelper(), this.ContentManager, deprecationWarnings);
                 foreach (Action warning in deprecationWarnings)
                     warning();
+#else
+                this.LoadMods(mods, new JsonHelper(), this.ContentManager);
 #endif
             }
             if (this.Monitor.IsExiting)
@@ -469,7 +469,7 @@ namespace StardewModdingAPI
         private void RunConsoleLoop()
         {
             // prepare console
-#if !SMAPI_2_0
+#if SMAPI_1_x
             this.Monitor.Log("Starting console...");
 #endif
             this.Monitor.Log("Type 'help' for help, or 'help <cmd>' for a command's usage", LogLevel.Info);
@@ -603,17 +603,17 @@ namespace StardewModdingAPI
         /// <param name="mods">The mods to load.</param>
         /// <param name="jsonHelper">The JSON helper with which to read mods' JSON files.</param>
         /// <param name="contentManager">The content manager to use for mod content.</param>
-#if !SMAPI_2_0
+#if SMAPI_1_x
         /// <param name="deprecationWarnings">A list to populate with any deprecation warnings.</param>
         private void LoadMods(IModMetadata[] mods, JsonHelper jsonHelper, SContentManager contentManager, IList<Action> deprecationWarnings)
 #else
         private void LoadMods(IModMetadata[] mods, JsonHelper jsonHelper, SContentManager contentManager)
 #endif
         {
-#if SMAPI_2_0
-            this.Monitor.Log("Loading mods...", LogLevel.Trace);
-#else
+#if SMAPI_1_x
             this.Monitor.Log("Loading mods...");
+#else
+            this.Monitor.Log("Loading mods...", LogLevel.Trace);
 #endif
             // load mod assemblies
             IDictionary<IModMetadata, string> skippedMods = new Dictionary<IModMetadata, string>();
@@ -691,7 +691,7 @@ namespace StardewModdingAPI
                             continue;
                         }
 
-#if !SMAPI_2_0
+#if SMAPI_1_x
                         // prevent mods from using SMAPI 2.0 content interception before release
                         // ReSharper disable SuspiciousTypeConversion.Global
                         if (mod is IAssetEditor || mod is IAssetLoader)
@@ -712,7 +712,7 @@ namespace StardewModdingAPI
                             mod.ModManifest = manifest;
                             mod.Helper = new ModHelper(manifest.UniqueID, metadata.DirectoryPath, jsonHelper, contentHelper, commandHelper, modRegistryHelper, reflectionHelper, translationHelper);
                             mod.Monitor = this.GetSecondaryMonitor(metadata.DisplayName);
-#if !SMAPI_2_0
+#if SMAPI_1_x
                             mod.PathOnDisk = metadata.DirectoryPath;
 #endif
                         }
@@ -730,7 +730,7 @@ namespace StardewModdingAPI
             IModMetadata[] loadedMods = this.ModRegistry.GetMods().ToArray();
 
             // log skipped mods
-#if SMAPI_2_0
+#if !SMAPI_1_x
             this.Monitor.Newline();
 #endif
             if (skippedMods.Any())
@@ -746,7 +746,7 @@ namespace StardewModdingAPI
                     else
                         this.Monitor.Log($"   {mod.DisplayName} because {reason}", LogLevel.Error);
                 }
-#if SMAPI_2_0
+#if !SMAPI_1_x
                 this.Monitor.Newline();
 #endif
             }
@@ -763,7 +763,7 @@ namespace StardewModdingAPI
                     LogLevel.Info
                 );
             }
-#if SMAPI_2_0
+#if !SMAPI_1_x
             this.Monitor.Newline();
 #endif
 
@@ -785,7 +785,7 @@ namespace StardewModdingAPI
                 {
                     IMod mod = metadata.Mod;
                     mod.Entry(mod.Helper);
-#if !SMAPI_2_0
+#if SMAPI_1_x
                     (mod as Mod)?.Entry(); // deprecated since 1.0
 
                     // raise deprecation warning for old Entry() methods
@@ -869,7 +869,10 @@ namespace StardewModdingAPI
                     }
                     else
                     {
-#if SMAPI_2_0
+#if SMAPI_1_x
+                        this.Monitor.Log("The following commands are registered: " + string.Join(", ", this.CommandManager.GetAll().Select(p => p.Name)) + ".", LogLevel.Info);
+                        this.Monitor.Log("For more information about a command, type 'help command_name'.", LogLevel.Info);
+#else
                         string message = "The following commands are registered:\n";
                         IGrouping<string, string>[] groups = (from command in this.CommandManager.GetAll() orderby command.ModName, command.Name group command.Name by command.ModName).ToArray();
                         foreach (var group in groups)
@@ -881,9 +884,6 @@ namespace StardewModdingAPI
                         message += "For more information about a command, type 'help command_name'.";
 
                         this.Monitor.Log(message, LogLevel.Info);
-#else
-                        this.Monitor.Log("The following commands are registered: " + string.Join(", ", this.CommandManager.GetAll().Select(p => p.Name)) + ".", LogLevel.Info);
-                        this.Monitor.Log("For more information about a command, type 'help command_name'.", LogLevel.Info);
 #endif
                     }
                     break;
@@ -933,7 +933,7 @@ namespace StardewModdingAPI
             {
                 WriteToConsole = this.Monitor.WriteToConsole,
                 ShowTraceInConsole = this.Settings.DeveloperMode,
-#if SMAPI_2_0
+#if !SMAPI_1_x
                 ShowFullStampInConsole = this.Settings.DeveloperMode
 #endif
             };
diff --git a/src/StardewModdingAPI/Utilities/SButton.cs b/src/StardewModdingAPI/Utilities/SButton.cs
index f4fccfff..c4833b0b 100644
--- a/src/StardewModdingAPI/Utilities/SButton.cs
+++ b/src/StardewModdingAPI/Utilities/SButton.cs
@@ -1,16 +1,16 @@
-using System;
+using System;
 using Microsoft.Xna.Framework.Input;
 
 namespace StardewModdingAPI.Utilities
 {
     /// <summary>A unified button constant which includes all controller, keyboard, and mouse buttons.</summary>
     /// <remarks>Derived from <see cref="Keys"/>, <see cref="Buttons"/>, and <see cref="System.Windows.Forms.MouseButtons"/>.</remarks>
-#if SMAPI_2_0
-    public
-#else
+#if SMAPI_1_x
     internal
+#else
+    public
 #endif
-        enum SButton
+    enum SButton
     {
         /// <summary>No valid key.</summary>
         None = 0,
@@ -593,10 +593,10 @@ namespace StardewModdingAPI.Utilities
     }
 
     /// <summary>Provides extension methods for <see cref="SButton"/>.</summary>
-#if SMAPI_2_0
-    public
-#else
+#if SMAPI_1_x
     internal
+#else
+    public
 #endif
     static class SButtonExtensions
     {
@@ -646,7 +646,7 @@ namespace StardewModdingAPI.Utilities
         /// <returns>Returns whether the value was converted successfully.</returns>
         public static bool TryGetController(this SButton input, out Buttons button)
         {
-            if (Enum.IsDefined(typeof(Keys), (int)input - SButtonExtensions.ControllerOffset))
+            if (Enum.IsDefined(typeof(Buttons), (int)input - SButtonExtensions.ControllerOffset))
             {
                 button = (Buttons)(input - SButtonExtensions.ControllerOffset);
                 return true;
diff --git a/src/TrainerMod/TrainerMod.csproj b/src/TrainerMod/TrainerMod.csproj
index 99a15c8f..57c8a907 100644
--- a/src/TrainerMod/TrainerMod.csproj
+++ b/src/TrainerMod/TrainerMod.csproj
@@ -38,7 +38,7 @@
   <ItemGroup>
     <Reference Include="Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>..\packages\Newtonsoft.Json.8.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
-      <Private>True</Private>
+      <Private>False</Private>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/src/TrainerMod/manifest.json b/src/TrainerMod/manifest.json
index f1665a45..5c634f53 100644
--- a/src/TrainerMod/manifest.json
+++ b/src/TrainerMod/manifest.json
@@ -4,7 +4,7 @@
   "Version": {
     "MajorVersion": 1,
     "MinorVersion": 15,
-    "PatchVersion": 0,
+    "PatchVersion": 1,
     "Build": null
   },
   "Description": "Adds SMAPI console commands that let you manipulate the game.",
diff --git a/src/crossplatform.targets b/src/crossplatform.targets
index 929aac6c..66e15abd 100644
--- a/src/crossplatform.targets
+++ b/src/crossplatform.targets
@@ -1,4 +1,4 @@
-<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Condition="$(OS) != 'Windows_NT' AND Exists('$(HOME)\stardewvalley.targets')" Project="$(HOME)\stardewvalley.targets" />
   <Import Condition="$(OS) == 'Windows_NT' AND Exists('$(USERPROFILE)\stardewvalley.targets')" Project="$(USERPROFILE)\stardewvalley.targets" />
   <PropertyGroup>
@@ -35,6 +35,7 @@
         </Reference>
         <Reference Include="Stardew Valley">
           <HintPath>$(GamePath)\Stardew Valley.exe</HintPath>
+          <Private Condition="'$(MSBuildProjectName)' != 'StardewModdingAPI.Tests'">False</Private>
         </Reference>
         <Reference Include="xTile, Version=2.0.4.0, Culture=neutral, processorArchitecture=x86">
           <HintPath>$(GamePath)\xTile.dll</HintPath>