Version: 263.0.2

(cherry picked from commit 51bbc5dc45)

Directory.Packages.props

@@ -57,7 +57,7 @@
     <PackageVersion Include="SharpZstd.Interop" Version="1.5.2-beta2" />
     <PackageVersion Include="SixLabors.ImageSharp" Version="3.1.7" />
     <PackageVersion Include="SpaceWizards.HttpListener" Version="0.1.1" />
-    <PackageVersion Include="SpaceWizards.NFluidsynth" Version="0.1.1" />
+    <PackageVersion Include="SpaceWizards.NFluidsynth" Version="0.2.2" />
     <PackageVersion Include="SpaceWizards.SharpFont" Version="1.0.2" />
     <PackageVersion Include="SpaceWizards.Sodium" Version="0.2.1" />
     <PackageVersion Include="TerraFX.Interop.Windows" Version="10.0.26100.1" />

MSBuild/Robust.Engine.Version.props

@@ -1,4 +1,4 @@
 <Project>
 
-    <!-- This file automatically reset by Tools/version.py -->
+    <!-- This file automatically reset by Tools/version.py -->
 

RELEASE-NOTES.md

@@ -54,6 +54,58 @@ END TEMPLATE-->
 *None yet*
 
 
+## 263.0.2
+
+
+## 263.0.1
+
+
+## 263.0.0
+
+### Breaking changes
+
+* Fully removed some non-`Entity<T>` container methods.
+
+### New features
+
+* `IMidiRenderer.LoadSoundfont` has been split into `LoadSoundfontResource` and `LoadSoundfontUser`, the original now being deprecated.
+* Client command execution now properly catches errors instead of letting them bubble up through the input stack.
+* Added `CompletionHelper.PrototypeIdsLimited` API to allow commands to autocomplete entity prototype IDs.
+* Added `spawn:in` Toolshed command.
+* Added `MapLoaderSystem.TryLoadGeneric` overload to load from a `Stream`.
+* Added `OutputPanel.GetMessage()` and `OutputPanel.SetMessage()` to allow replacing individual messages.
+
+### Bugfixes
+
+* Fixed debug asserts when using MIDI on Windows.
+* Fixed an error getting logged on startup on macOS related to window icons.
+* `CC-BY-NC-ND-4.0` is now a valid license for the RGA validator.
+* Fixed `TabContainer.CurrentTab` clamping against the wrong value.
+* Fix culture-based parsing in `TimespanSerializer`.
+* Fixed grid rendering blowing up on tile IDs that aren't registered.
+* Fixed debug assert when loading MIDI soundfonts on Windows.
+* Make `ColorSelectorSliders` properly update the dropdown when changing `SelectorType`.
+* Fixed `tpto` allowing teleports to oneself, thereby causing them to be deleted.
+* Fix OpenAL extensions being requested incorrectly, causing an error on macOS.
+* Fixed horizontal measuring of markup controls in rich text.
+
+### Other
+
+* Improved logging for some audio entity errors.
+* Avoided more server stutters when using `csci`.
+* Improved physics performance.
+* Made various localization functions like `GENDER()` not throw if passed a string instead of an `EntityUid`.
+* The generic clause on `EntitySystem.AddComp<T>` has been changed to `IComponent` (from `Component`) for consistency with `IEntityManager.AddComponent<T>`.
+* `DataDefinitionAnalyzer` has been optimized somewhat.
+* Improved assert logging error message when static data fields are encountered.
+
+### Internal
+
+* Warning cleanup.
+* Added more tests for `DataDefinitionAnalyzer`.
+* Consistently use `EntitySystem` proxy methods in engine.
+
+
 ## 262.0.0
 
 ### Breaking changes

Resources/Locale/en-US/toolshed-commands.ftl

@@ -195,6 +195,8 @@ command-description-spawn-at =
     Spawns an entity at the given coordinates.
 command-description-spawn-on =
     Spawns an entity on the given entity, at it's coordinates.
+command-description-spawn-in =
+    Spawns an entity in the given container on the given entity, dropping it at its coordinates if it doesn't fit
 command-description-spawn-attached =
     Spawns an entity attached to the given entity, at (0 0) relative to it.
 command-description-mappos =

Robust.Analyzers.Tests/DataDefinitionAnalyzerTest.cs

@@ -55,7 +55,7 @@ public sealed class DataDefinitionAnalyzerTest
         namespace Robust.Shared.Serialization.Manager.Attributes
         {
             public class DataFieldBaseAttribute : Attribute;
-            public class DataFieldAttribute : DataFieldBaseAttribute;
+            public class DataFieldAttribute(string? tag = null) : DataFieldBaseAttribute;
             public sealed class DataDefinitionAttribute : Attribute;
             public sealed class NotYamlSerializableAttribute : Attribute;
         }
@@ -117,6 +117,61 @@ public sealed class DataDefinitionAnalyzerTest
         );
     }
 
+    [Test]
+    public async Task PartialDataDefinitionTest()
+    {
+        const string code = """
+            using Robust.Shared.Serialization.Manager.Attributes;
+
+            [DataDefinition]
+            public sealed class Foo { }
+            """;
+
+        await Verifier(code,
+            // /0/Test0.cs(4,15): error RA0017: Type Foo is a DataDefinition but is not partial
+            VerifyCS.Diagnostic(DataDefinitionAnalyzer.DataDefinitionPartialRule).WithSpan(4, 15, 4, 20).WithArguments("Foo")
+        );
+    }
+
+    [Test]
+    public async Task NestedPartialDataDefinitionTest()
+    {
+        const string code = """
+            using Robust.Shared.Serialization.Manager.Attributes;
+
+            public sealed class Foo
+            {
+                [DataDefinition]
+                public sealed partial class Nested { }
+            }
+            """;
+
+        await Verifier(code,
+            // /0/Test0.cs(3,15): error RA0018: Type Foo contains nested data definition Nested but is not partial
+            VerifyCS.Diagnostic(DataDefinitionAnalyzer.NestedDataDefinitionPartialRule).WithSpan(3, 15, 3, 20).WithArguments("Foo", "Nested")
+        );
+    }
+
+    [Test]
+    public async Task RedundantDataFieldTagTest()
+    {
+        const string code = """
+            using Robust.Shared.Serialization.Manager.Attributes;
+
+            [DataDefinition]
+            public sealed partial class Foo
+            {
+                [DataField("someValue")]
+                public int SomeValue;
+            }
+            """;
+
+        await Verifier(code,
+            // /0/Test0.cs(6,6): info RA0027: Data field SomeValue in data definition Foo has an explicitly set tag that matches autogenerated tag
+            VerifyCS.Diagnostic(DataDefinitionAnalyzer.DataFieldRedundantTagRule).WithSpan(6, 6, 6, 28).WithArguments("SomeValue", "Foo")
+        );
+    }
+
     [Test]
     public async Task ReadOnlyPropertyTest()
     {

Robust.Analyzers/DataDefinitionAnalyzer.cs

@@ -22,7 +22,7 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
     private const string DataFieldAttributeName = "DataField";
     private const string ViewVariablesAttributeName = "ViewVariables";
 
-    private static readonly DiagnosticDescriptor DataDefinitionPartialRule = new(
+    public static readonly DiagnosticDescriptor DataDefinitionPartialRule = new(
         Diagnostics.IdDataDefinitionPartial,
         "Type must be partial",
         "Type {0} is a DataDefinition but is not partial",
@@ -32,7 +32,7 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         "Make sure to mark any type that is a data definition as partial."
     );
 
-    private static readonly DiagnosticDescriptor NestedDataDefinitionPartialRule = new(
+    public static readonly DiagnosticDescriptor NestedDataDefinitionPartialRule = new(
         Diagnostics.IdNestedDataDefinitionPartial,
         "Type must be partial",
         "Type {0} contains nested data definition {1} but is not partial",
@@ -62,7 +62,7 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         "Make sure to add a setter."
     );
 
-    private static readonly DiagnosticDescriptor DataFieldRedundantTagRule = new(
+    public static readonly DiagnosticDescriptor DataFieldRedundantTagRule = new(
         Diagnostics.IdDataFieldRedundantTag,
         "Data field has redundant tag specified",
         "Data field {0} in data definition {1} has an explicitly set tag that matches autogenerated tag",
@@ -102,14 +102,23 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.None);
         context.EnableConcurrentExecution();
 
-        context.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.ClassDeclaration);
-        context.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.StructDeclaration);
-        context.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.RecordDeclaration);
-        context.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.RecordStructDeclaration);
-        context.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.InterfaceDeclaration);
+        context.RegisterSymbolStartAction(symbolContext =>
+        {
+            if (symbolContext.Symbol is not INamedTypeSymbol typeSymbol)
+                return;
 
-        context.RegisterSyntaxNodeAction(AnalyzeDataField, SyntaxKind.FieldDeclaration);
-        context.RegisterSyntaxNodeAction(AnalyzeDataFieldProperty, SyntaxKind.PropertyDeclaration);
+            if (!IsDataDefinition(typeSymbol))
+                return;
+
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.ClassDeclaration);
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.StructDeclaration);
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.RecordDeclaration);
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.RecordStructDeclaration);
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataDefinition, SyntaxKind.InterfaceDeclaration);
+
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataField, SyntaxKind.FieldDeclaration);
+            symbolContext.RegisterSyntaxNodeAction(AnalyzeDataFieldProperty, SyntaxKind.PropertyDeclaration);
+        }, SymbolKind.NamedType);
     }
 
     private void AnalyzeDataDefinition(SyntaxNodeAnalysisContext context)
@@ -117,8 +126,7 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         if (context.Node is not TypeDeclarationSyntax declaration)
             return;
 
-        var type = context.SemanticModel.GetDeclaredSymbol(declaration)!;
-        if (!IsDataDefinition(type))
+        if (context.ContainingSymbol is not INamedTypeSymbol type)
             return;
 
         if (!IsPartial(declaration))
@@ -129,7 +137,7 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         var containingType = type.ContainingType;
         while (containingType != null)
         {
-            var containingTypeDeclaration = (TypeDeclarationSyntax) containingType.DeclaringSyntaxReferences[0].GetSyntax();
+            var containingTypeDeclaration = (TypeDeclarationSyntax)containingType.DeclaringSyntaxReferences[0].GetSyntax();
             if (!IsPartial(containingTypeDeclaration))
             {
                 context.ReportDiagnostic(Diagnostic.Create(NestedDataDefinitionPartialRule, containingTypeDeclaration.Keyword.GetLocation(), containingType.Name, type.Name));
@@ -144,27 +152,26 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         if (context.Node is not FieldDeclarationSyntax field)
             return;
 
-        var typeDeclaration = field.FirstAncestorOrSelf<TypeDeclarationSyntax>();
-        if (typeDeclaration == null)
-            return;
-
-        var type = context.SemanticModel.GetDeclaredSymbol(typeDeclaration)!;
-        if (!IsDataDefinition(type))
+        if (context.ContainingSymbol?.ContainingType is not INamedTypeSymbol type)
             return;
 
         foreach (var variable in field.Declaration.Variables)
         {
             var fieldSymbol = context.SemanticModel.GetDeclaredSymbol(variable);
+
             if (fieldSymbol == null)
                 continue;
 
+            if (!IsDataField(fieldSymbol, out _, out var datafieldAttribute))
+                continue;
+
             if (IsReadOnlyDataField(type, fieldSymbol))
             {
                 TryGetModifierLocation(field, SyntaxKind.ReadOnlyKeyword, out var location);
                 context.ReportDiagnostic(Diagnostic.Create(DataFieldWritableRule, location, fieldSymbol.Name, type.Name));
             }
 
-            if (HasRedundantTag(fieldSymbol))
+            if (HasRedundantTag(fieldSymbol, datafieldAttribute))
             {
                 TryGetAttributeLocation(field, DataFieldAttributeName, out var location);
                 context.ReportDiagnostic(Diagnostic.Create(DataFieldRedundantTagRule, location, fieldSymbol.Name, type.Name));
@@ -196,25 +203,28 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         if (context.Node is not PropertyDeclarationSyntax property)
             return;
 
-        var typeDeclaration = property.FirstAncestorOrSelf<TypeDeclarationSyntax>();
-        if (typeDeclaration == null)
+        if (context.ContainingSymbol is not IPropertySymbol propertySymbol)
             return;
 
-        var type = context.SemanticModel.GetDeclaredSymbol(typeDeclaration)!;
-        if (!IsDataDefinition(type) || type.IsRecord || type.IsValueType)
+        if (propertySymbol.ContainingType is not INamedTypeSymbol type)
+            return;
+
+        if (type.IsRecord || type.IsValueType)
             return;
 
-        var propertySymbol = context.SemanticModel.GetDeclaredSymbol(property);
         if (propertySymbol == null)
             return;
 
+        if (!IsDataField(propertySymbol, out _, out var datafieldAttribute))
+            return;
+
         if (IsReadOnlyDataField(type, propertySymbol))
         {
             var location = property.AccessorList != null ? property.AccessorList.GetLocation() : property.GetLocation();
             context.ReportDiagnostic(Diagnostic.Create(DataFieldPropertyWritableRule, location, propertySymbol.Name, type.Name));
         }
 
-        if (HasRedundantTag(propertySymbol))
+        if (HasRedundantTag(propertySymbol, datafieldAttribute))
         {
             TryGetAttributeLocation(property, DataFieldAttributeName, out var location);
             context.ReportDiagnostic(Diagnostic.Create(DataFieldRedundantTagRule, location, propertySymbol.Name, type.Name));
@@ -242,9 +252,6 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
 
     private static bool IsReadOnlyDataField(ITypeSymbol type, ISymbol field)
     {
-        if (!IsDataField(field, out _, out _))
-            return false;
-
         return IsReadOnlyMember(type, field);
     }
 
@@ -369,17 +376,14 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
         return false;
     }
 
-    private static bool HasRedundantTag(ISymbol symbol)
+    private static bool HasRedundantTag(ISymbol symbol, AttributeData datafieldAttribute)
     {
-        if (!IsDataField(symbol, out var _, out var attribute))
-            return false;
-
         // No args, no problem
-        if (attribute.ConstructorArguments.Length == 0)
+        if (datafieldAttribute.ConstructorArguments.Length == 0)
             return false;
 
         // If a tag is explicitly specified, it will be the first argument...
-        var tagArgument = attribute.ConstructorArguments[0];
+        var tagArgument = datafieldAttribute.ConstructorArguments[0];
         // ...but the first arg could also something else, since tag is optional
         // so we make sure that it's a string
         if (tagArgument.Value is not string explicitName)
@@ -394,9 +398,6 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
 
     private static bool HasVVReadWrite(ISymbol symbol)
     {
-        if (!IsDataField(symbol, out _, out _))
-            return false;
-
         // Make sure it has ViewVariablesAttribute
         AttributeData? viewVariablesAttribute = null;
         foreach (var attr in symbol.GetAttributes())
@@ -422,9 +423,6 @@ public sealed class DataDefinitionAnalyzer : DiagnosticAnalyzer
 
     private static bool IsNotYamlSerializable(ISymbol field, ITypeSymbol type)
     {
-        if (!IsDataField(field, out _, out _))
-            return false;
-
         return HasAttribute(type, NotYamlSerializableName);
     }
 

Robust.Client.WebView/Cef/Program.cs

@@ -6,7 +6,7 @@ using Xilium.CefGlue;
 
 namespace Robust.Client.WebView.Cef
 {
-    public static class Program
+    internal static class Program
     {
         // This was supposed to be the main entry for the subprocess program... It doesn't work.
         public static int Main(string[] args)

Robust.Client.WebView/Cef/WebViewManagerCef.cs

@@ -5,6 +5,7 @@ using System.Net;
 using System.Reflection;
 using System.Text;
 using Robust.Client.Console;
+using Robust.Client.Utility;
 using Robust.Shared.Configuration;
 using Robust.Shared.ContentPack;
 using Robust.Shared.IoC;
@@ -24,6 +25,7 @@ namespace Robust.Client.WebView.Cef
 
         [Dependency] private readonly IDependencyCollection _dependencyCollection = default!;
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+        [Dependency] private readonly IGameControllerInternal _gameController = default!;
         [Dependency] private readonly IResourceManagerInternal _resourceManager = default!;
         [Dependency] private readonly IClientConsoleHost _consoleHost = default!;
         [Dependency] private readonly IConfigurationManager _cfg = default!;
@@ -61,7 +63,10 @@ namespace Robust.Client.WebView.Cef
 
             var cachePath = "";
             if (_resourceManager.UserData is WritableDirProvider userData)
-                cachePath = userData.GetFullPath(new ResPath("/cef_cache"));
+            {
+                var rootDir = UserDataDir.GetRootUserDataDir(_gameController);
+                cachePath = Path.Combine(rootDir, "cef_cache", "0");
+            }
 
             var settings = new CefSettings()
             {

Robust.Client/Audio/AudioManager.cs

@@ -57,8 +57,8 @@ internal sealed partial class AudioManager : IAudioInternal
         _checkAlError();
 
         // Load up AL context extensions.
-        var s = ALC.GetString(ALDevice.Null, AlcGetString.Extensions) ?? "";
-        foreach (var extension in s.Split(' '))
+        var s = ALC.GetString(_openALDevice, AlcGetString.Extensions) ?? "";
+        foreach (var extension in s.Split(' ', StringSplitOptions.RemoveEmptyEntries))
         {
             _alContextExtensions.Add(extension);
         }

Robust.Client/Audio/AudioSystem.cs

@@ -582,7 +582,7 @@ public sealed partial class AudioSystem : SharedAudioSystem
     {
         if (TerminatingOrDeleted(entity))
         {
-            Log.Error($"Tried to play coordinates audio on a terminating / deleted entity {ToPrettyString(entity)}");
+            LogAudioPlaybackOnInvalidEntity(specifier, entity);
             return null;
         }
 
@@ -626,7 +626,7 @@ public sealed partial class AudioSystem : SharedAudioSystem
     {
         if (TerminatingOrDeleted(coordinates.EntityId))
         {
-            Log.Error($"Tried to play coordinates audio on a terminating / deleted entity {ToPrettyString(coordinates.EntityId)}");
+            LogAudioPlaybackOnInvalidEntity(specifier, coordinates.EntityId);
             return null;
         }
 
@@ -753,6 +753,12 @@ public sealed partial class AudioSystem : SharedAudioSystem
         return _resourceCache.GetResource<AudioResource>(filename).AudioStream.Length;
     }
 
+    private void LogAudioPlaybackOnInvalidEntity(ResolvedSoundSpecifier? specifier, EntityUid entityId)
+    {
+        var soundInfo = specifier?.ToString() ?? "unknown sound";
+        Log.Error($"Tried to play coordinates audio on a terminating / deleted entity {ToPrettyString(entityId)}. Sound: {soundInfo}. Trace: {Environment.StackTrace}");
+    }
+
     #region Jobs
 
     private record struct UpdateAudioJob : IParallelRobustJob

Robust.Client/Audio/Midi/IMidiRenderer.cs

@@ -6,6 +6,7 @@ using Robust.Shared.Audio.Midi;
 using Robust.Shared.Audio.Sources;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Map;
+using Robust.Shared.Utility;
 
 namespace Robust.Client.Audio.Midi;
 
@@ -156,8 +157,13 @@ public interface IMidiRenderer : IDisposable
     /// <summary>
     ///     Loads a new soundfont into the renderer.
     /// </summary>
+    [Obsolete("Use LoadSoundfontResource or LoadSoundfontUser instead")]
     void LoadSoundfont(string filename, bool resetPresets = false);
 
+    void LoadSoundfontResource(ResPath path, bool resetPresets = false);
+
+    void LoadSoundfontUser(ResPath path, bool resetPresets = false);
+
     /// <summary>
     ///     Invoked whenever a new midi event is registered.
     /// </summary>

Robust.Client/Audio/Midi/MidiManager.SoundFontLoad.cs

@@ -0,0 +1,262 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using NFluidsynth;
+using Robust.Shared.ContentPack;
+using Robust.Shared.Utility;
+
+namespace Robust.Client.Audio.Midi;
+
+internal sealed partial class MidiManager
+{
+    // For loading sound fonts, we have to use a callback model where we can only parse a string.
+    // This API, frankly, fucking sucks.
+    //
+    // These prefixes are used to separate the various places a file *can* be loaded from.
+    //
+    // We cannot prevent Fluidsynth from trying to load prefixed paths itself if they are invalid
+    // So if content specifies "/foobar.sf2" to be loaded and it doesn't exist,
+    // Fluidsynth *will* try to fopen("RES:/foobar.sf2"). For this reason I'm putting in some nonsense characters
+    // that will pass through Fluidsynth fine, but make sure the filename is *never* a practically valid OS path.
+    //
+    // NOTE: Raw disk paths *cannot* be prefixed as Fluidsynth needs to load those itself.
+    // Specifically, their .dls loader doesn't respect file callbacks.
+    // If you're curious why this is: it's two-fold:
+    // * The Fluidsynth C code for the .dls loader just doesn't use the file callbacks, period.
+    // * Even if it did, we're not specifying those file callbacks, as they're per loader,
+    //   and we're only adding a *new* sound font loader with file callbacks, not modifying the existing ones.
+    //   The loader for .sfX format and .dls format are different loader objects in Fluidsynth.
+    internal const string PrefixCommon = "!/ -?\x0001";
+    internal const string PrefixLegacy = PrefixCommon + "LEGACY";
+    internal const string PrefixUser = PrefixCommon + "USER";
+    internal const string PrefixResources = PrefixCommon + "RES";
+
+    private void LoadSoundFontSetup(MidiRenderer renderer)
+    {
+        _midiSawmill.Debug($"Loading fallback soundfont {FallbackSoundfont}");
+        // Since the last loaded soundfont takes priority, we load the fallback soundfont before the soundfont.
+        renderer.LoadSoundfontResource(FallbackSoundfont);
+
+        // Load system-specific soundfonts.
+        if (OperatingSystem.IsLinux())
+        {
+            foreach (var filepath in LinuxSoundfonts)
+            {
+                if (!File.Exists(filepath) || !SoundFont.IsSoundFont(filepath))
+                    continue;
+
+                try
+                {
+                    _midiSawmill.Debug($"Loading OS soundfont {filepath}");
+                    renderer.LoadSoundfontDisk(filepath);
+                }
+                catch (Exception)
+                {
+                    continue;
+                }
+
+                break;
+            }
+        }
+        else if (OperatingSystem.IsMacOS())
+        {
+            if (File.Exists(OsxSoundfont) && SoundFont.IsSoundFont(OsxSoundfont))
+            {
+                _midiSawmill.Debug($"Loading OS soundfont {OsxSoundfont}");
+                renderer.LoadSoundfontDisk(OsxSoundfont);
+            }
+        }
+        else if (OperatingSystem.IsWindows())
+        {
+            if (File.Exists(WindowsSoundfont) && SoundFont.IsSoundFont(WindowsSoundfont))
+            {
+                _midiSawmill.Debug($"Loading OS soundfont {WindowsSoundfont}");
+                renderer.LoadSoundfontDisk(WindowsSoundfont);
+            }
+        }
+
+        // Maybe load soundfont specified in environment variable.
+        // Load it here so it can override system soundfonts but not content or user data soundfonts.
+        if (Environment.GetEnvironmentVariable(SoundfontEnvironmentVariable) is { } soundfontOverride)
+        {
+            // Just to avoid funny shit: avoid people smuggling a prefix in here.
+            // I wish I could separate this properly...
+            var (prefix, _) = SplitPrefix(soundfontOverride);
+            if (IsValidPrefix(prefix))
+            {
+                _midiSawmill.Error($"Not respecting {SoundfontEnvironmentVariable} env variable: invalid file path");
+            }
+            else if (File.Exists(soundfontOverride) && SoundFont.IsSoundFont(soundfontOverride))
+            {
+                _midiSawmill.Debug($"Loading environment variable soundfont {soundfontOverride}");
+                renderer.LoadSoundfontDisk(soundfontOverride);
+            }
+        }
+
+        // Load content-specific custom soundfonts, which should override the system/fallback soundfont.
+        _midiSawmill.Debug($"Loading soundfonts from content directory {ContentCustomSoundfontDirectory}");
+        foreach (var file in _resourceManager.ContentFindFiles(ContentCustomSoundfontDirectory))
+        {
+            if (file.Extension != "sf2" && file.Extension != "dls" && file.Extension != "sf3") continue;
+            _midiSawmill.Debug($"Loading content soundfont {file}");
+            renderer.LoadSoundfontResource(file);
+        }
+
+        // Load every soundfont from the user data directory last, since those may override any other soundfont.
+        _midiSawmill.Debug($"Loading soundfonts from user data directory {CustomSoundfontDirectory}");
+        var enumerator = _resourceManager.UserData.Find($"{CustomSoundfontDirectory.ToRelativePath()}*").Item1;
+        foreach (var file in enumerator)
+        {
+            if (file.Extension != "sf2" && file.Extension != "dls" && file.Extension != "sf3") continue;
+            _midiSawmill.Debug($"Loading user soundfont {file}");
+            renderer.LoadSoundfontUser(file);
+        }
+    }
+
+    internal static string PrefixPath(string prefix, string value)
+    {
+        return $"{prefix}:{value}";
+    }
+
+    internal static (string prefix, string? value) SplitPrefix(string filename)
+    {
+        var filenameSplit = filename.Split(':', 2);
+        if (filenameSplit.Length == 1)
+            return (filenameSplit[0], null);
+
+        return (filenameSplit[0], filenameSplit[1]);
+    }
+
+    internal static bool IsValidPrefix(string prefix)
+    {
+        return prefix is PrefixLegacy or PrefixUser or PrefixResources;
+    }
+
+    /// <summary>
+    ///     This class is used to load soundfonts.
+    /// </summary>
+    private sealed class ResourceLoaderCallbacks : SoundFontLoaderCallbacks
+    {
+        private readonly MidiManager _parent;
+        private readonly Dictionary<int, Stream> _openStreams = new();
+        private int _nextStreamId = 1;
+
+        public ResourceLoaderCallbacks(MidiManager parent)
+        {
+            _parent = parent;
+        }
+
+        public override IntPtr Open(string filename)
+        {
+            if (string.IsNullOrEmpty(filename))
+            {
+                return IntPtr.Zero;
+            }
+
+            Stream stream;
+            try
+            {
+                stream = OpenCore(filename);
+            }
+            catch (Exception e)
+            {
+                _parent._midiSawmill.Error($"Error while opening sound font: {e}");
+                return IntPtr.Zero;
+            }
+
+            var id = _nextStreamId++;
+
+            _openStreams.Add(id, stream);
+
+            return (IntPtr) id;
+        }
+
+        private Stream OpenCore(string filename)
+        {
+            var (prefix, value) = SplitPrefix(filename);
+
+            if (!IsValidPrefix(prefix) || value == null)
+                return File.OpenRead(filename);
+
+            var resourceCache = _parent._resourceManager;
+            var resourcePath = new ResPath(value);
+
+            switch (prefix)
+            {
+                case PrefixUser:
+                    return resourceCache.UserData.OpenRead(resourcePath);
+                case PrefixResources:
+                    return resourceCache.ContentFileRead(resourcePath);
+                case PrefixLegacy:
+                    // Try resources first, then try user data.
+                    if (resourceCache.TryContentFileRead(resourcePath, out var stream))
+                        return stream;
+
+                    return resourceCache.UserData.OpenRead(resourcePath);
+                default:
+                    throw new UnreachableException("Invalid prefix specified!");
+            }
+        }
+
+        public override unsafe int Read(IntPtr buf, long count, IntPtr sfHandle)
+        {
+            var length = (int) count;
+            var span = new Span<byte>(buf.ToPointer(), length);
+            var stream = _openStreams[(int) sfHandle];
+
+            // Fluidsynth's docs state that this method should leave the buffer unmodified if it fails. (returns -1)
+            try
+            {
+                // Fluidsynth does a LOT of tiny allocations (frankly, way too much).
+                if (count < 1024)
+                {
+                    // ReSharper disable once SuggestVarOrType_Elsewhere
+                    Span<byte> buffer = stackalloc byte[(int)count];
+
+                    stream.ReadExact(buffer);
+
+                    buffer.CopyTo(span);
+                }
+                else
+                {
+                    var buffer = stream.ReadExact(length);
+
+                    buffer.CopyTo(span);
+                }
+            }
+            catch (EndOfStreamException)
+            {
+                return -1;
+            }
+
+            return 0;
+        }
+
+        public override int Seek(IntPtr sfHandle, long offset, SeekOrigin origin)
+        {
+            var stream = _openStreams[(int) sfHandle];
+
+            stream.Seek(offset, origin);
+
+            return 0;
+        }
+
+        public override long Tell(IntPtr sfHandle)
+        {
+            var stream = _openStreams[(int) sfHandle];
+
+            return (long) stream.Position;
+        }
+
+        public override int Close(IntPtr sfHandle)
+        {
+            if (!_openStreams.Remove((int) sfHandle, out var stream))
+                return -1;
+
+            stream.Dispose();
+            return 0;
+
+        }
+    }
+}

Robust.Client/Audio/Midi/MidiManager.cs

@@ -119,7 +119,7 @@ internal sealed partial class MidiManager : IMidiManager
     private const string OsxSoundfont =
         "/System/Library/Components/CoreAudio.component/Contents/Resources/gs_instruments.dls";
 
-    private const string FallbackSoundfont = "/Midi/fallback.sf2";
+    private static readonly ResPath FallbackSoundfont = new ResPath("/Midi/fallback.sf2");
 
     private const string ContentCustomSoundfontDirectory = "/Audio/MidiCustom/";
 
@@ -265,81 +265,7 @@ internal sealed partial class MidiManager : IMidiManager
 
             var renderer = new MidiRenderer(_settings!, soundfontLoader, mono, this, _audio, _taskManager, _midiSawmill);
 
-            _midiSawmill.Debug($"Loading fallback soundfont {FallbackSoundfont}");
-            // Since the last loaded soundfont takes priority, we load the fallback soundfont before the soundfont.
-            renderer.LoadSoundfont(FallbackSoundfont);
-
-            // Load system-specific soundfonts.
-            if (OperatingSystem.IsLinux())
-            {
-                foreach (var filepath in LinuxSoundfonts)
-                {
-                    if (!File.Exists(filepath) || !SoundFont.IsSoundFont(filepath))
-                        continue;
-
-                    try
-                    {
-                        _midiSawmill.Debug($"Loading OS soundfont {filepath}");
-                        renderer.LoadSoundfont(filepath);
-                    }
-                    catch (Exception)
-                    {
-                        continue;
-                    }
-
-                    break;
-                }
-            }
-            else if (OperatingSystem.IsMacOS())
-            {
-                if (File.Exists(OsxSoundfont) && SoundFont.IsSoundFont(OsxSoundfont))
-                {
-                    _midiSawmill.Debug($"Loading OS soundfont {OsxSoundfont}");
-                    renderer.LoadSoundfont(OsxSoundfont);
-                }
-            }
-            else if (OperatingSystem.IsWindows())
-            {
-                if (File.Exists(WindowsSoundfont) && SoundFont.IsSoundFont(WindowsSoundfont))
-                {
-                    _midiSawmill.Debug($"Loading OS soundfont {WindowsSoundfont}");
-                    renderer.LoadSoundfont(WindowsSoundfont);
-                }
-            }
-
-            // Maybe load soundfont specified in environment variable.
-            // Load it here so it can override system soundfonts but not content or user data soundfonts.
-            if (Environment.GetEnvironmentVariable(SoundfontEnvironmentVariable) is {} soundfontOverride)
-            {
-                if (File.Exists(soundfontOverride) && SoundFont.IsSoundFont(soundfontOverride))
-                {
-                    _midiSawmill.Debug($"Loading environment variable soundfont {soundfontOverride}");
-                    renderer.LoadSoundfont(soundfontOverride);
-                }
-            }
-
-            // Load content-specific custom soundfonts, which should override the system/fallback soundfont.
-            _midiSawmill.Debug($"Loading soundfonts from content directory {ContentCustomSoundfontDirectory}");
-            foreach (var file in _resourceManager.ContentFindFiles(ContentCustomSoundfontDirectory))
-            {
-                if (file.Extension != "sf2" && file.Extension != "dls" && file.Extension != "sf3") continue;
-                _midiSawmill.Debug($"Loading content soundfont {file}");
-                renderer.LoadSoundfont(file.ToString());
-            }
-
-            var userDataPath = _resourceManager.UserData.RootDir == null
-                ? CustomSoundfontDirectory
-                : new ResPath(_resourceManager.UserData.RootDir) / CustomSoundfontDirectory.ToRelativePath();
-
-            // Load every soundfont from the user data directory last, since those may override any other soundfont.
-            _midiSawmill.Debug($"Loading soundfonts from user data directory {userDataPath}");
-            var enumerator = _resourceManager.UserData.Find($"{CustomSoundfontDirectory.ToRelativePath()}*").Item1;
-            foreach (var file in enumerator)
-            {
-                if (file.Extension != "sf2" && file.Extension != "dls" && file.Extension != "sf3") continue;
-                _midiSawmill.Debug($"Loading user soundfont {file}");
-                renderer.LoadSoundfont(file.ToString());
-            }
+            LoadSoundFontSetup(renderer);
 
             renderer.Source.Gain = _gain;
 
@@ -572,130 +498,6 @@ internal sealed partial class MidiManager : IMidiManager
             midiEvent.Velocity);
     }
 
-    /// <summary>
-    ///     This class is used to load soundfonts.
-    /// </summary>
-    private sealed class ResourceLoaderCallbacks : SoundFontLoaderCallbacks
-    {
-        private readonly MidiManager _parent;
-        private readonly Dictionary<int, Stream> _openStreams = new();
-        private int _nextStreamId = 1;
-
-        public ResourceLoaderCallbacks(MidiManager parent)
-        {
-            _parent = parent;
-        }
-
-        public override IntPtr Open(string filename)
-        {
-            if (string.IsNullOrEmpty(filename))
-            {
-                return IntPtr.Zero;
-            }
-
-            Stream? stream;
-            var resourceCache = _parent._resourceManager;
-            var resourcePath = new ResPath(filename);
-
-            if (resourcePath.IsRooted)
-            {
-                // is it in content?
-                if (resourceCache.ContentFileExists(filename))
-                {
-                    if (!resourceCache.TryContentFileRead(filename, out stream))
-                        return IntPtr.Zero;
-                }
-                // is it in userdata?
-                else if (resourceCache.UserData.Exists(resourcePath))
-                {
-                    stream = resourceCache.UserData.OpenRead(resourcePath);
-                }
-                else if (File.Exists(filename))
-                {
-                    stream = File.OpenRead(filename);
-                }
-                else
-                {
-                    return IntPtr.Zero;
-                }
-            }
-            else if (File.Exists(filename))
-            {
-                stream = File.OpenRead(filename);
-            }
-            else
-            {
-                return IntPtr.Zero;
-            }
-
-            var id = _nextStreamId++;
-
-            _openStreams.Add(id, stream);
-
-            return (IntPtr) id;
-        }
-
-        public override unsafe int Read(IntPtr buf, long count, IntPtr sfHandle)
-        {
-            var length = (int) count;
-            var span = new Span<byte>(buf.ToPointer(), length);
-            var stream = _openStreams[(int) sfHandle];
-
-            // Fluidsynth's docs state that this method should leave the buffer unmodified if it fails. (returns -1)
-            try
-            {
-                // Fluidsynth does a LOT of tiny allocations (frankly, way too much).
-                if (count < 1024)
-                {
-                    // ReSharper disable once SuggestVarOrType_Elsewhere
-                    Span<byte> buffer = stackalloc byte[(int)count];
-
-                    stream.ReadExact(buffer);
-
-                    buffer.CopyTo(span);
-                }
-                else
-                {
-                    var buffer = stream.ReadExact(length);
-
-                    buffer.CopyTo(span);
-                }
-            }
-            catch (EndOfStreamException)
-            {
-                return -1;
-            }
-
-            return 0;
-        }
-
-        public override int Seek(IntPtr sfHandle, long offset, SeekOrigin origin)
-        {
-            var stream = _openStreams[(int) sfHandle];
-
-            stream.Seek(offset, origin);
-
-            return 0;
-        }
-
-        public override long Tell(IntPtr sfHandle)
-        {
-            var stream = _openStreams[(int) sfHandle];
-
-            return (long) stream.Position;
-        }
-
-        public override int Close(IntPtr sfHandle)
-        {
-            if (!_openStreams.Remove((int) sfHandle, out var stream))
-                return -1;
-
-            stream.Dispose();
-            return 0;
-
-        }
-    }
-
     #region Jobs
 
     private record struct MidiUpdateJob : IParallelRobustJob

Robust.Client/Audio/Midi/MidiRenderer.SoundFontLoad.cs

@@ -0,0 +1,45 @@
+using System;
+using Robust.Shared.Utility;
+
+namespace Robust.Client.Audio.Midi;
+
+internal sealed partial class MidiRenderer
+{
+    [Obsolete("Use LoadSoundfontResource or LoadSoundfontUser instead")]
+    public void LoadSoundfont(string filename, bool resetPresets = true)
+    {
+        LoadSoundfontCore(
+            MidiManager.PrefixPath(MidiManager.PrefixLegacy, filename),
+            resetPresets);
+    }
+
+    public void LoadSoundfontResource(ResPath path, bool resetPresets = false)
+    {
+        LoadSoundfontCore(
+            MidiManager.PrefixPath(MidiManager.PrefixResources, path.ToString()),
+            resetPresets);
+    }
+
+    public void LoadSoundfontUser(ResPath path, bool resetPresets = false)
+    {
+        LoadSoundfontCore(
+            MidiManager.PrefixPath(MidiManager.PrefixUser, path.ToString()),
+            resetPresets);
+    }
+
+    internal void LoadSoundfontDisk(string path, bool resetPresets = false)
+    {
+        LoadSoundfontCore(
+            path,
+            resetPresets);
+    }
+
+    private void LoadSoundfontCore(string filenameString, bool resetPresets)
+    {
+        lock (_playerStateLock)
+        {
+            _synth.LoadSoundFont(filenameString, resetPresets);
+            MidiSoundfont = 1;
+        }
+    }
+}

Robust.Client/Audio/Midi/MidiRenderer.cs

@@ -16,7 +16,7 @@ using Robust.Shared.ViewVariables;
 
 namespace Robust.Client.Audio.Midi;
 
-internal sealed class MidiRenderer : IMidiRenderer
+internal sealed partial class MidiRenderer : IMidiRenderer
 {
     private readonly IMidiManager _midiManager;
     private readonly ITaskManager _taskManager;
@@ -435,15 +435,6 @@ internal sealed class MidiRenderer : IMidiRenderer
         _sequencer.RemoveEvents(SequencerClientId.Wildcard, SequencerClientId.Wildcard, -1);
     }
 
-    public void LoadSoundfont(string filename, bool resetPresets = true)
-    {
-        lock (_playerStateLock)
-        {
-            _synth.LoadSoundFont(filename, resetPresets);
-            MidiSoundfont = 1;
-        }
-    }
-
     void IMidiRenderer.Render()
     {
         Render();

Robust.Client/Console/ClientConsoleHost.cs

@@ -191,8 +191,16 @@ namespace Robust.Client.Console
             var shell = new ConsoleShell(this, session ?? _player.LocalSession, session == null);
             var cmdArgs = args.ToArray();
 
-            AnyCommandExecuted?.Invoke(shell, commandName, command, cmdArgs);
-            cmd.Execute(shell, command, cmdArgs);
+            try
+            {
+                AnyCommandExecuted?.Invoke(shell, commandName, command, cmdArgs);
+                cmd.Execute(shell, command, cmdArgs);
+            }
+            catch (Exception e)
+            {
+                _conLogger.Error($"ExecuteError - {command}:\n{e}");
+                shell.WriteError($"There was an error while executing the command: {e}");
+            }
         }
 
         private bool CanExecute(string cmdName)

Robust.Client/Debugging/DebugAnchoringSystem.cs

@@ -82,7 +82,7 @@ namespace Robust.Client.Debugging
 
             foreach (var ent in _mapSystem.GetAnchoredEntities(gridUid, grid, spot))
             {
-                if (EntityManager.TryGetComponent<MetaDataComponent>(ent, out var meta))
+                if (TryComp<MetaDataComponent>(ent, out var meta))
                 {
                     text.AppendLine($"uid: {ent}, {meta.EntityName}");
                 }

Robust.Client/GameController/GameController.cs

@@ -387,7 +387,7 @@ namespace Robust.Client
 
             _prof.Initialize();
 
-            _resManager.Initialize(Options.LoadConfigAndUserData ? userDataDir : null);
+            _resManager.Initialize(Options.LoadConfigAndUserData ? userDataDir : null, hideUserDataDir: true);
 
             var mountOptions = _commandLineArgs != null
                 ? MountOptions.Merge(_commandLineArgs.MountOptions, Options.MountOptions)

Robust.Client/GameObjects/EntitySystems/AnimationPlayerSystem.cs

@@ -97,7 +97,7 @@ namespace Robust.Client.GameObjects
         [Obsolete("Use Play(EntityUid<AnimationPlayerComponent> ent, Animation animation, string key) instead")]
         public void Play(EntityUid uid, AnimationPlayerComponent? component, Animation animation, string key)
         {
-            component ??= EntityManager.EnsureComponent<AnimationPlayerComponent>(uid);
+            component ??= EnsureComp<AnimationPlayerComponent>(uid);
             Play(new Entity<AnimationPlayerComponent>(uid, component), animation, key);
         }
 
@@ -158,7 +158,7 @@ namespace Robust.Client.GameObjects
 
         public bool HasRunningAnimation(EntityUid uid, string key)
         {
-            return EntityManager.TryGetComponent(uid, out AnimationPlayerComponent? component) &&
+            return TryComp(uid, out AnimationPlayerComponent? component) &&
                    component.PlayingAnimations.ContainsKey(key);
         }
 

Robust.Client/GameObjects/EntitySystems/InputSystem.cs

@@ -223,12 +223,12 @@ namespace Robust.Client.GameObjects
 
         private void SetEntityContextActive(IInputManager inputMan, EntityUid entity)
         {
-            if(entity == default || !EntityManager.EntityExists(entity))
+            if(entity == default || !Exists(entity))
                 throw new ArgumentNullException(nameof(entity));
 
-            if (!EntityManager.TryGetComponent(entity, out InputComponent? inputComp))
+            if (!TryComp(entity, out InputComponent? inputComp))
             {
-                _sawmillInputContext.Debug($"AttachedEnt has no InputComponent: entId={entity}, entProto={EntityManager.GetComponent<MetaDataComponent>(entity).EntityPrototype}. Setting default \"{InputContextContainer.DefaultContextName}\" context...");
+                _sawmillInputContext.Debug($"AttachedEnt has no InputComponent: entId={entity}, entProto={Comp<MetaDataComponent>(entity).EntityPrototype}. Setting default \"{InputContextContainer.DefaultContextName}\" context...");
                 inputMan.Contexts.SetActiveContext(InputContextContainer.DefaultContextName);
                 return;
             }
@@ -239,7 +239,7 @@ namespace Robust.Client.GameObjects
             }
             else
             {
-                _sawmillInputContext.Error($"Unknown context: entId={entity}, entProto={EntityManager.GetComponent<MetaDataComponent>(entity).EntityPrototype}, context={inputComp.ContextName}. . Setting default \"{InputContextContainer.DefaultContextName}\" context...");
+                _sawmillInputContext.Error($"Unknown context: entId={entity}, entProto={Comp<MetaDataComponent>(entity).EntityPrototype}, context={inputComp.ContextName}. . Setting default \"{InputContextContainer.DefaultContextName}\" context...");
                 inputMan.Contexts.SetActiveContext(InputContextContainer.DefaultContextName);
             }
         }

Robust.Client/GameObjects/EntitySystems/ShowPlayerVelocityDebugSystem.cs

@@ -51,7 +51,7 @@ public sealed class ShowPlayerVelocityDebugSystem : EntitySystem
 
         var player = _playerManager.LocalEntity;
 
-        if (player == null || !EntityManager.TryGetComponent(player.Value, out PhysicsComponent? body))
+        if (player == null || !TryComp(player.Value, out PhysicsComponent? body))
         {
             _label.Visible = false;
             return;

Robust.Client/Graphics/Clyde/Clyde.GridRendering.cs

@@ -254,9 +254,9 @@ namespace Robust.Client.Graphics.Clyde
                             region = regionMaybe[tile.Variant];
                         }
 
-                        var rotationMirroring = _tileDefinitionManager[tile.TypeId].AllowRotationMirror
-                            ? tile.RotationMirroring
-                            : 0;
+                        var rotationMirroring = (_tileDefinitionManager.TryGetDefinition(tile.TypeId, out var tileDef) && tileDef.AllowRotationMirror) ?
+                                                    tile.RotationMirroring
+                                                    : 0;
 
                         WriteTileToBuffers(i, gridX, gridY, vertexBuffer, indexBuffer, region, rotationMirroring);
                         i += 1;

Robust.Client/Graphics/Clyde/Windowing/Glfw.Windows.cs

@@ -662,6 +662,10 @@ namespace Robust.Client.Graphics.Clyde
             {
                 var icons = _clyde.LoadWindowIcons().ToArray();
 
+                // Done if no icon (e.g., macOS)
+                if (icons.Length == 0)
+                    return;
+
                 // Turn each image into a byte[] so we can actually pin their contents.
                 // Wish I knew a clean way to do this without allocations.
                 var images = icons

Robust.Client/Physics/JointSystem.cs

@@ -67,7 +67,7 @@ namespace Robust.Client.Physics
 
                 // Add new joint (if possible).
                 // Need to wait for BOTH joint components to come in first before we can add it. Yay dependencies!
-                if (!EntityManager.HasComponent<JointComponent>(other))
+                if (!HasComp<JointComponent>(other))
                     continue;
 
                 // TODO: if (other entity is outside of PVS range) continue;

Robust.Client/UserInterface/Controls/ColorSelectorSliders.cs

@@ -42,6 +42,7 @@ public sealed class ColorSelectorSliders : Control
                     break;
             }
             _currentType = value;
+            _typeSelector.Select(_types.IndexOf(value));
             UpdateType();
             Update();
         }

Robust.Client/UserInterface/Controls/OutputPanel.cs

@@ -107,6 +107,11 @@ namespace Robust.Client.UserInterface.Controls
             _scrollBar.Value = 0;
         }
 
+        public FormattedMessage GetMessage(Index index)
+        {
+            return new FormattedMessage(_entries[index].Message);
+        }
+
         public void RemoveEntry(Index index)
         {
             var entry = _entries[index];
@@ -138,6 +143,31 @@ namespace Robust.Client.UserInterface.Controls
 
             _entries.Add(entry);
             var font = _getFont();
+            AddNewItemHeight(font, entry);
+
+            _scrollBar.MaxValue = Math.Max(_scrollBar.Page, _totalContentHeight);
+            if (_isAtBottom && ScrollFollowing)
+            {
+                _scrollBar.MoveToEnd();
+            }
+        }
+
+        public void SetMessage(Index index, FormattedMessage message, Type[]? tagsAllowed = null, Color? defaultColor = null)
+        {
+            var oldEntry = _entries[index];
+            var font = _getFont();
+            _totalContentHeight -= oldEntry.Height + font.GetLineSeparation(UIScale);
+            _scrollBar.MaxValue = Math.Max(_scrollBar.Page, _totalContentHeight);
+
+            var entry = new RichTextEntry(message, this, _tagManager, tagsAllowed, defaultColor);
+            entry.Update(_tagManager, _getFont(), _getContentBox().Width, UIScale);
+            _entries[index] = entry;
+
+            AddNewItemHeight(font, in entry);
+        }
+
+        private void AddNewItemHeight(Font font, in RichTextEntry entry)
+        {
             _totalContentHeight += entry.Height;
             if (_firstLine)
             {
@@ -147,12 +177,6 @@ namespace Robust.Client.UserInterface.Controls
             {
                 _totalContentHeight += font.GetLineSeparation(UIScale);
             }
-
-            _scrollBar.MaxValue = Math.Max(_scrollBar.Page, _totalContentHeight);
-            if (_isAtBottom && ScrollFollowing)
-            {
-                _scrollBar.MoveToEnd();
-            }
         }
 
         public void ScrollToBottom()

Robust.Client/UserInterface/Controls/TabContainer.cs

@@ -30,12 +30,12 @@ namespace Robust.Client.UserInterface.Controls
             get => _currentTab;
             set
             {
-                if (_currentTab < 0)
+                if (value < 0)
                 {
                     throw new ArgumentOutOfRangeException(nameof(value), value, "Current tab must be positive.");
                 }
 
-                if (_currentTab >= ChildCount)
+                if (value >= ChildCount)
                 {
                     throw new ArgumentOutOfRangeException(nameof(value), value,
                         "Current tab must less than the amount of tabs.");

Robust.Client/UserInterface/FileDialogManager.cs

@@ -18,12 +18,15 @@ namespace Robust.Client.UserInterface
     [SuppressMessage("ReSharper", "IdentifierTypo")]
     [SuppressMessage("ReSharper", "CommentTypo")]
     [SuppressMessage("ReSharper", "StringLiteralTypo")]
-    internal sealed class FileDialogManager : IFileDialogManager
+    internal sealed class FileDialogManager : IFileDialogManager, IPostInjectInit
     {
         // Uses nativefiledialog to open the file dialogs cross platform.
         // On Linux, if the kdialog command is found, it will be used instead.
         // TODO: Should we maybe try to avoid running kdialog if the DE isn't KDE?
         [Dependency] private readonly IClydeInternal _clyde = default!;
+        [Dependency] private readonly ILogManager _log = default!;
+
+        private ISawmill _sawmill = default!;
 
         private bool _kDialogAvailable;
         private bool _checkedKDialogAvailable;
@@ -267,7 +270,7 @@ namespace Robust.Client.UserInterface
 
                 if (_kDialogAvailable)
                 {
-                    Logger.DebugS("filedialog", "kdialog available.");
+                    _sawmill.Debug("kdialog available.");
                 }
             }
             catch
@@ -404,6 +407,11 @@ namespace Robust.Client.UserInterface
         [DllImport("swnfd.dll")]
         private static extern unsafe void sw_NFD_Free(void* ptr);
 
+        public void PostInject()
+        {
+            _sawmill = _log.GetSawmill("filedialog");
+        }
+
         private enum sw_nfdresult
         {
             SW_NFD_ERROR,

Robust.Client/UserInterface/RichTextEntry.cs

@@ -141,7 +141,7 @@ namespace Robust.Client.UserInterface
                 if (Controls == null || !Controls.TryGetValue(nodeIndex, out var control))
                     continue;
 
-                control.Measure(new Vector2(Width, Height));
+                control.Measure(new Vector2(maxSizeX, Height));
 
                 var desiredSize = control.DesiredPixelSize;
                 var controlMetrics = new CharMetrics(

Robust.Server/Audio/AudioSystem.cs

@@ -137,7 +137,7 @@ public sealed partial class AudioSystem : SharedAudioSystem
 
         if (TerminatingOrDeleted(coordinates.EntityId))
         {
-            Log.Error($"Tried to play coordinates audio on a terminating / deleted entity {ToPrettyString(coordinates.EntityId)}.  Trace: {Environment.StackTrace}");
+            LogAudioPlaybackOnInvalidEntity(specifier, coordinates.EntityId);
             return null;
         }
 
@@ -160,7 +160,7 @@ public sealed partial class AudioSystem : SharedAudioSystem
 
         if (TerminatingOrDeleted(coordinates.EntityId))
         {
-            Log.Error($"Tried to play coordinates audio on a terminating / deleted entity {ToPrettyString(coordinates.EntityId)}.  Trace: {Environment.StackTrace}");
+            LogAudioPlaybackOnInvalidEntity(specifier, coordinates.EntityId);
             return null;
         }
 
@@ -281,4 +281,10 @@ public sealed partial class AudioSystem : SharedAudioSystem
     {
         // TODO: Yeah remove this...
     }
+
+    private void LogAudioPlaybackOnInvalidEntity(ResolvedSoundSpecifier? specifier, EntityUid entityId)
+    {
+        var soundInfo = specifier?.ToString() ?? "unknown sound";
+        Log.Error($"Tried to play coordinates audio on a terminating / deleted entity {ToPrettyString(entityId)}. Sound: {soundInfo}. Trace: {Environment.StackTrace}");
+    }
 }

Robust.Server/BaseServer.cs

@@ -297,7 +297,7 @@ namespace Robust.Server
                 : null;
 
             // Set up the VFS
-            _resources.Initialize(dataDir);
+            _resources.Initialize(dataDir, hideUserDataDir: false);
 
             var mountOptions = _commandLineArgs != null
                 ? MountOptions.Merge(_commandLineArgs.MountOptions, Options.MountOptions) : Options.MountOptions;

Robust.Server/GameObjects/EntitySystems/MapSystem.cs

@@ -60,7 +60,7 @@ namespace Robust.Server.GameObjects
 
                 foreach (var uid in toDelete)
                 {
-                    EntityManager.DeleteEntity(uid);
+                    Del(uid);
                 }
             }
         }
@@ -75,7 +75,7 @@ namespace Robust.Server.GameObjects
             if (!_deleteEmptyGrids || TerminatingOrDeleted(uid) || HasComp<MapComponent>(uid))
                 return;
 
-            EntityManager.DeleteEntity(args.GridId);
+            Del(args.GridId);
         }
     }
 }

Robust.Server/GameObjects/EntitySystems/ViewSubscriberSystem.cs

@@ -20,7 +20,7 @@ public sealed class ViewSubscriberSystem : SharedViewSubscriberSystem
     public override void AddViewSubscriber(EntityUid uid, ICommonSession session)
     {
         // If the entity doesn't have the component, it will be added.
-        var viewSubscriber = EntityManager.EnsureComponent<Shared.GameObjects.ViewSubscriberComponent>(uid);
+        var viewSubscriber = EnsureComp<Shared.GameObjects.ViewSubscriberComponent>(uid);
 
         if (viewSubscriber.SubscribedSessions.Contains(session))
             return; // Already subscribed, do nothing else.
@@ -36,7 +36,7 @@ public sealed class ViewSubscriberSystem : SharedViewSubscriberSystem
     /// </summary>
     public override void RemoveViewSubscriber(EntityUid uid, ICommonSession session)
     {
-        if(!EntityManager.TryGetComponent(uid, out Shared.GameObjects.ViewSubscriberComponent? viewSubscriber))
+        if(!TryComp(uid, out Shared.GameObjects.ViewSubscriberComponent? viewSubscriber))
             return; // Entity didn't have any subscriptions, do nothing.
 
         if (!viewSubscriber.SubscribedSessions.Remove(session))

Robust.Server/GameStates/PvsSystem.GetStates.cs

@@ -132,7 +132,7 @@ internal sealed partial class PvsSystem
 
         if (enumerateAll)
         {
-            var query = EntityManager.AllEntityQueryEnumerator<MetaDataComponent>();
+            var query = AllEntityQuery<MetaDataComponent>();
             while (query.MoveNext(out var uid, out var md))
             {
                 DebugTools.Assert(md.EntityLifeStage >= EntityLifeStage.Initialized, $"Entity {ToPrettyString(uid)} has not been initialized");

Robust.Server/GameStates/PvsSystem.cs

@@ -199,7 +199,7 @@ internal sealed partial class PvsSystem : EntitySystem
 
         foreach (var uid in _toDelete)
         {
-            EntityManager.QueueDeleteEntity(uid);
+            QueueDel(uid);
         }
         _toDelete.Clear();
 

Robust.Server/Player/FilterSystem.cs

@@ -10,7 +10,7 @@ namespace Robust.Server.Player
         {
             foreach (var uid in entities)
             {
-                if (EntityManager.TryGetComponent(uid, out ActorComponent? actor))
+                if (TryComp(uid, out ActorComponent? actor))
                     filter.AddPlayer(actor.PlayerSession);
             }
 

Robust.Server/Scripting/ScriptHost.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
@@ -188,13 +189,20 @@ namespace Robust.Server.Scripting
             }
 
             // Compile ahead of time so that we can do syntax highlighting correctly for the echo.
-            newScript.Compile();
+            await Task.Run(() =>
+            {
+                newScript.Compile();
 
-            // Echo entered script.
-            var echoMessage = new FormattedMessage();
-            ScriptInstanceShared.AddWithSyntaxHighlighting(newScript, echoMessage, code, instance.HighlightWorkspace);
+                // Echo entered script.
+                var echoMessage = new FormattedMessage();
+                ScriptInstanceShared.AddWithSyntaxHighlighting(
+                    newScript,
+                    echoMessage,
+                    code,
+                    instance.HighlightWorkspace.Value);
 
-            replyMessage.Echo = echoMessage;
+                replyMessage.Echo = echoMessage;
+            });
 
             var msg = new FormattedMessage();
 
@@ -332,7 +340,7 @@ namespace Robust.Server.Scripting
 
         private sealed class ScriptInstance
         {
-            public Workspace HighlightWorkspace { get; } = new AdhocWorkspace();
+            public Lazy<Workspace> HighlightWorkspace { get; } = new(() => new AdhocWorkspace());
             public StringBuilder InputBuffer { get; } = new();
             public FormattedMessage OutputBuffer { get; } = new();
             public bool RunningScript { get; set; }
@@ -373,7 +381,7 @@ namespace Robust.Server.Scripting
                     script.Compile();
 
                     var syntax = new FormattedMessage();
-                    ScriptInstanceShared.AddWithSyntaxHighlighting(script, syntax, code, _scriptInstance.HighlightWorkspace);
+                    ScriptInstanceShared.AddWithSyntaxHighlighting(script, syntax, code, _scriptInstance.HighlightWorkspace.Value);
 
                     _scriptInstance.OutputBuffer.AddMessage(syntax);
                 }

Robust.Shared/Console/Commands/TeleportCommands.cs

@@ -127,10 +127,10 @@ public sealed class TeleportToCommand : LocalizedEntityCommands
         {
             foreach (var victim in args)
             {
-                if (victim == target)
+                if (!TryGetTransformFromUidOrUsername(victim, shell, out var uid, out var victimTransform))
                     continue;
 
-                if (!TryGetTransformFromUidOrUsername(victim, shell, out var uid, out var victimTransform))
+                if (uid == targetUid)
                     continue;
 
                 victims.Add((uid.Value, victimTransform));

Robust.Shared/Console/CompletionHelper.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -155,7 +156,7 @@ public static class CompletionHelper
     ///     Returns a completion list for all prototype IDs of the given type.
     /// </summary>
     /// <remarks>
-    ///     Don't use this for prototypes types that likely have a large number of entries, like <see cref="EntityPrototype"/>.
+    ///     Don't use this for prototypes types that likely have a large number of entries, like <see cref="EntityPrototype"/>, use <see cref="PrototypeIdsLimited{T}"/> instead.
     /// </remarks>
     public static IEnumerable<CompletionOption> PrototypeIDs<T>(bool sorted = true, IPrototypeManager? proto = null)
         where T: class, IPrototype
@@ -166,6 +167,36 @@ public static class CompletionHelper
         return sorted ? protoOptions.OrderBy(o => o.Value) : protoOptions;
     }
 
+    /// <summary>
+    /// Returns a completion list for all prototype IDs of the given type, limited to avoid performance problems.
+    /// </summary>
+    /// <remarks>
+    /// This is a limited alternative to <see cref="PrototypeIDs{T}"/>.
+    /// The limit is applied before sorting of results, so the unfiltered results are somewhat arbitrary.
+    /// </remarks>
+    /// <param name="currentArgument">The argument being currently typed for the completion.</param>
+    /// <param name="proto">The <see cref="IPrototypeManager"/>.</param>
+    /// <param name="sorted">Whether to sort the results or not.</param>
+    /// <param name="maxCount">The maximum amount of results to return at once.</param>
+    /// <typeparam name="T">The type of prototype to search through.</typeparam>
+    /// <returns></returns>
+    public static IEnumerable<CompletionOption> PrototypeIdsLimited<T>(
+        string currentArgument,
+        IPrototypeManager proto,
+        bool sorted = true,
+        int maxCount = 30) where T : class, IPrototype
+    {
+        var protoOptions = proto.EnumeratePrototypes<T>()
+            .Where(p => p.ID.StartsWith(currentArgument, StringComparison.OrdinalIgnoreCase))
+            .Take(maxCount)
+            .Select(p => new CompletionOption(p.ID));
+
+        if (sorted)
+            protoOptions = protoOptions.OrderBy(o => o.Value);
+
+        return protoOptions;
+    }
+
     /// <summary>
     ///     Returns a list of connected session names.
     /// </summary>

Robust.Shared/Containers/SharedContainerSystem.cs

@@ -391,13 +391,6 @@ namespace Robust.Shared.Containers
             return TryFindComponentsOnEntityContainerOrParent(xform.ParentUid, entityQuery, foundComponents);
         }
 
-
-        [Obsolete("Use Entity<T> variant")]
-        public bool IsInSameOrNoContainer(EntityUid user, EntityUid other)
-        {
-            return IsInSameOrNoContainer((user, null, null), (other, null, null));
-        }
-
         /// <summary>
         ///     Returns true if the two entities are not contained, or are contained in the same container.
         /// </summary>
@@ -418,13 +411,6 @@ namespace Robust.Shared.Containers
             return userContainer == otherContainer;
         }
 
-
-        [Obsolete("Use Entity<T> variant")]
-        public bool IsInSameOrParentContainer(EntityUid user, EntityUid other)
-        {
-            return IsInSameOrParentContainer((user, null), other);
-        }
-
         /// <summary>
         ///     Returns true if the two entities are not contained, or are contained in the same container, or if one
         ///     entity contains the other (i.e., is the parent).
@@ -459,21 +445,6 @@ namespace Robust.Shared.Containers
             return userContainer == otherContainer;
         }
 
-        [Obsolete("Use Entity<T> variant")]
-        public bool IsInSameOrTransparentContainer(
-            EntityUid user,
-            EntityUid other,
-            BaseContainer? userContainer = null,
-            BaseContainer? otherContainer = null,
-            bool userSeeInsideSelf = false)
-        {
-            return IsInSameOrTransparentContainer((user, null),
-                other,
-                userContainer,
-                otherContainer,
-                userSeeInsideSelf);
-        }
-
         /// <summary>
         ///     Check whether a given entity can see another entity despite whatever containers they may be in.
         /// </summary>

Robust.Shared/ContentPack/DirLoader.cs

@@ -60,9 +60,7 @@ namespace Robust.Shared.ContentPack
 
             internal string GetPath(ResPath relPath)
             {
-                return Path.GetFullPath(Path.Combine(_directory.FullName, relPath.ToRelativeSystemPath()))
-                    // Sanitise platform-specific path and standardize it for engine use.
-                    .Replace(Path.DirectorySeparatorChar, '/');
+                return PathHelpers.SafeGetResourcePath(_directory.FullName, relPath);
             }
 
             /// <inheritdoc />

Robust.Shared/ContentPack/IResourceManagerInternal.cs

@@ -14,7 +14,11 @@ namespace Robust.Shared.ContentPack
         /// The directory to use for user data.
         /// If null, a virtual temporary file system is used instead.
         /// </param>
-        void Initialize(string? userData);
+        /// <param name="hideUserDataDir">
+        /// If true, <see cref="IWritableDirProvider.RootDir"/> will be hidden on
+        /// <see cref="IResourceManager.UserData"/>.
+        /// </param>
+        void Initialize(string? userData, bool hideUserDataDir);
 
         /// <summary>
         ///     Mounts a single stream as a content file. Useful for unit testing.

Robust.Shared/ContentPack/IWritableDirProvider.cs

@@ -13,7 +13,7 @@ namespace Robust.Shared.ContentPack
     {
         /// <summary>
         /// The root path of this provider.
-        /// Can be null if it's a virtual provider.
+        /// Can be null if it's a virtual provider or the path is protected (e.g. on the client).
         /// </summary>
         string? RootDir { get; }
 

Robust.Shared/ContentPack/PathHelpers.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Runtime.InteropServices;
+using Robust.Shared.Utility;
 
 namespace Robust.Shared.ContentPack
 {
@@ -63,5 +64,27 @@ namespace Robust.Shared.ContentPack
             !OperatingSystem.IsWindows()
             && !OperatingSystem.IsMacOS();
 
+
+        internal static string SafeGetResourcePath(string baseDir, ResPath path)
+        {
+            var relSysPath = path.ToRelativeSystemPath();
+            if (relSysPath.Contains("\\..") || relSysPath.Contains("/.."))
+            {
+                // Hard cap on any exploit smuggling a .. in there.
+                // Since that could allow leaving sandbox.
+                throw new InvalidOperationException($"This branch should never be reached. Path: {path}");
+            }
+
+            var retPath = Path.GetFullPath(Path.Join(baseDir, relSysPath));
+            // better safe than sorry check
+            if (!retPath.StartsWith(baseDir))
+            {
+                // Allow path to match if it's just missing the directory separator at the end.
+                if (retPath != baseDir.TrimEnd(Path.DirectorySeparatorChar))
+                    throw new InvalidOperationException($"This branch should never be reached. Path: {path}");
+            }
+
+            return retPath;
+        }
     }
 }

Robust.Shared/ContentPack/ResourceManager.cs

@@ -41,13 +41,13 @@ namespace Robust.Shared.ContentPack
         public IWritableDirProvider UserData { get; private set; } = default!;
 
         /// <inheritdoc />
-        public virtual void Initialize(string? userData)
+        public virtual void Initialize(string? userData, bool hideRootDir)
         {
             Sawmill = _logManager.GetSawmill("res");
 
             if (userData != null)
             {
-                UserData = new WritableDirProvider(Directory.CreateDirectory(userData));
+                UserData = new WritableDirProvider(Directory.CreateDirectory(userData), hideRootDir);
             }
             else
             {
@@ -379,6 +379,10 @@ namespace Robust.Shared.ContentPack
                 {
                     var rootDir = loader.GetPath(new ResPath(@"/"));
 
+                    // TODO: GET RID OF THIS.
+                    // This code shouldn't be passing OS disk paths through ResPath.
+                    rootDir = rootDir.Replace(Path.DirectorySeparatorChar, '/');
+
                     yield return new ResPath(rootDir);
                 }
             }

Robust.Shared/ContentPack/WritableDirProvider.cs

@@ -10,17 +10,22 @@ namespace Robust.Shared.ContentPack
     /// <inheritdoc />
     internal sealed class WritableDirProvider : IWritableDirProvider
     {
-        /// <inheritdoc />
+        private readonly bool _hideRootDir;
+
         public string RootDir { get; }
 
+        string? IWritableDirProvider.RootDir => _hideRootDir ? null : RootDir;
+
         /// <summary>
         /// Constructs an instance of <see cref="WritableDirProvider"/>.
         /// </summary>
         /// <param name="rootDir">Root file system directory to allow writing.</param>
-        public WritableDirProvider(DirectoryInfo rootDir)
+        /// <param name="hideRootDir">If true, <see cref="IWritableDirProvider.RootDir"/> is reported as null.</param>
+        public WritableDirProvider(DirectoryInfo rootDir, bool hideRootDir)
         {
             // FullName does not have a trailing separator, and we MUST have a separator.
             RootDir = rootDir.FullName + Path.DirectorySeparatorChar.ToString();
+            _hideRootDir = hideRootDir;
         }
 
         #region File Access
@@ -119,7 +124,7 @@ namespace Robust.Shared.ContentPack
                 throw new FileNotFoundException();
 
             var dirInfo = new DirectoryInfo(GetFullPath(path));
-            return new WritableDirProvider(dirInfo);
+            return new WritableDirProvider(dirInfo, _hideRootDir);
         }
 
         /// <inheritdoc />
@@ -180,20 +185,7 @@ namespace Robust.Shared.ContentPack
 
             path = path.Clean();
 
-            return GetFullPath(RootDir, path);
-        }
-
-        private static string GetFullPath(string root, ResPath path)
-        {
-            var relPath = path.ToRelativeSystemPath();
-            if (relPath.Contains("\\..") || relPath.Contains("/.."))
-            {
-                // Hard cap on any exploit smuggling a .. in there.
-                // Since that could allow leaving sandbox.
-                throw new InvalidOperationException($"This branch should never be reached. Path: {path}");
-            }
-
-            return Path.GetFullPath(Path.Combine(root, relPath));
+            return PathHelpers.SafeGetResourcePath(RootDir, path);
         }
     }
 }

Robust.Shared/EntitySerialization/Systems/MapLoaderSystem.Load.cs

@@ -41,6 +41,31 @@ public sealed partial class MapLoaderSystem
         return true;
     }
 
+    /// <summary>
+    /// Tries to load entities from a YAML file, taking in a raw byte stream.
+    /// </summary>
+    /// <param name="file">The file contents to load from.</param>
+    /// <param name="fileName">
+    /// The name of the file being loaded. This is used purely for logging/informational purposes.
+    /// </param>
+    /// <param name="result">The result of the load operation.</param>
+    /// <param name="options">Options for the load operation.</param>
+    /// <returns>True if the load succeeded, false otherwise.</returns>
+    /// <seealso cref="M:Robust.Shared.EntitySerialization.Systems.MapLoaderSystem.TryLoadGeneric(Robust.Shared.Utility.ResPath,Robust.Shared.EntitySerialization.LoadResult@,System.Nullable{Robust.Shared.EntitySerialization.MapLoadOptions})"/>
+    public bool TryLoadGeneric(
+        Stream file,
+        string fileName,
+        [NotNullWhen(true)] out LoadResult? result,
+        MapLoadOptions? options = null)
+    {
+        result = null;
+
+        if (!TryReadFile(new StreamReader(file), out var data))
+            return false;
+
+        return TryLoadGeneric(data, fileName, out result, options);
+    }
+
     /// <summary>
     /// Tries to load entities from a yaml file. Whenever possible, you should try to use <see cref="TryLoadMap"/>,
     /// <see cref="TryLoadGrid"/>, or <see cref="TryLoadEntity"/> instead.
@@ -55,6 +80,17 @@ public sealed partial class MapLoaderSystem
         if (!TryReadFile(file, out var data))
             return false;
 
+        return TryLoadGeneric(data, file.ToString(), out result, options);
+    }
+
+    private bool TryLoadGeneric(
+        MappingDataNode data,
+        string fileName,
+        [NotNullWhen(true)] out LoadResult? result,
+        MapLoadOptions? options = null)
+    {
+        result = null;
+
         _stopwatch.Restart();
         var ev = new BeforeEntityReadEvent();
         RaiseLocalEvent(ev);
@@ -85,7 +121,7 @@ public sealed partial class MapLoaderSystem
 
         if (!deserializer.TryProcessData())
         {
-            Log.Debug($"Failed to process entity data in {file}");
+            Log.Debug($"Failed to process entity data in {fileName}");
             return false;
         }
 
@@ -95,7 +131,7 @@ public sealed partial class MapLoaderSystem
         }
         catch (Exception e)
         {
-            Log.Error($"Caught exception while creating entities for map {file}: {e}");
+            Log.Error($"Caught exception while creating entities for map {fileName}: {e}");
             Delete(deserializer.Result);
             throw;
         }
@@ -103,7 +139,7 @@ public sealed partial class MapLoaderSystem
         if (opts.ExpectedCategory is { } exp && exp != deserializer.Result.Category)
         {
             // Did someone try to load a map file as a grid or vice versa?
-            Log.Error($"Map {file} does not contain the expected data. Expected {exp} but got {deserializer.Result.Category}");
+            Log.Error($"Map {fileName} does not contain the expected data. Expected {exp} but got {deserializer.Result.Category}");
             Delete(deserializer.Result);
             return false;
         }

Robust.Shared/EntitySerialization/Systems/MapLoaderSystem.cs

@@ -64,6 +64,13 @@ public sealed partial class MapLoaderSystem : EntitySystem
             return false;
 
         Log.Info($"Loading file: {resPath}");
+        return TryReadFile(reader, out data);
+    }
+
+    private bool TryReadFile(TextReader reader, [NotNullWhen(true)] out MappingDataNode? data)
+    {
+        data = null;
+
         _stopwatch.Restart();
 
         using var textReader = reader;

Robust.Shared/GameObjects/EntitySystem.Proxy.cs

@@ -665,7 +665,7 @@ public partial class EntitySystem
 
     /// <inheritdoc cref="IEntityManager.AddComponent&lt;T&gt;(EntityUid)"/>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    protected T AddComp<T>(EntityUid uid) where T :  Component, new()
+    protected T AddComp<T>(EntityUid uid) where T :  IComponent, new()
     {
         return EntityManager.AddComponent<T>(uid);
     }

Robust.Shared/GameObjects/Systems/CollideOnAnchorSystem.cs

@@ -18,7 +18,7 @@ namespace Robust.Shared.GameObjects
 
         private void OnStartup(EntityUid uid, CollideOnAnchorComponent component, ComponentStartup args)
         {
-            if (!EntityManager.TryGetComponent(uid, out TransformComponent? transformComponent)) return;
+            if (!TryComp(uid, out TransformComponent? transformComponent)) return;
 
             SetCollide(uid, component, transformComponent.Anchored);
         }
@@ -31,7 +31,7 @@ namespace Robust.Shared.GameObjects
 
         private void SetCollide(EntityUid uid, CollideOnAnchorComponent component, bool anchored)
         {
-            if (!EntityManager.TryGetComponent(uid, out PhysicsComponent? body)) return;
+            if (!TryComp(uid, out PhysicsComponent? body)) return;
 
             var enabled = component.Enable;
 

Robust.Shared/GameObjects/Systems/PrototypeReloadSystem.cs

@@ -73,8 +73,8 @@ internal sealed class PrototypeReloadSystem : EntitySystem
             var data = newPrototype.Components[name];
             var component = _componentFactory.GetComponent(name);
 
-            if (!EntityManager.HasComponent(entity, component.GetType()))
-                EntityManager.AddComponent(entity, component);
+            if (!HasComp(entity, component.GetType()))
+                AddComp(entity, component);
         }
 
         // Update entity metadata

Robust.Shared/GameObjects/Systems/SharedGridFixtureSystem.cs

@@ -69,19 +69,19 @@ namespace Robust.Shared.GameObjects
             if (!_enabled)
                 return;
 
-            if (!EntityManager.TryGetComponent(uid, out PhysicsComponent? body))
+            if (!TryComp(uid, out PhysicsComponent? body))
             {
                 Log.Error($"Trying to regenerate collision for {uid} that doesn't have {nameof(body)}");
                 return;
             }
 
-            if (!EntityManager.TryGetComponent(uid, out FixturesComponent? manager))
+            if (!TryComp(uid, out FixturesComponent? manager))
             {
                 Log.Error($"Trying to regenerate collision for {uid} that doesn't have {nameof(manager)}");
                 return;
             }
 
-            if (!EntityManager.TryGetComponent(uid, out TransformComponent? xform))
+            if (!TryComp(uid, out TransformComponent? xform))
             {
                 Log.Error($"Trying to regenerate collision for {uid} that doesn't have {nameof(TransformComponent)}");
                 return;

Robust.Shared/GameObjects/Systems/SharedMapSystem.Grid.cs

@@ -158,7 +158,7 @@ public abstract partial class SharedMapSystem
         // Just MapLoader things.
         if (component.MapProxy == DynamicTree.Proxy.Free) return;
 
-        var xform = EntityManager.GetComponent<TransformComponent>(uid);
+        var xform = Comp<TransformComponent>(uid);
         var aabb = GetWorldAABB(uid, component, xform);
 
         if (TryComp<GridTreeComponent>(xform.MapUid, out var gridTree))

Robust.Shared/GameObjects/Systems/SharedUserInterfaceSystem.cs

@@ -636,7 +636,7 @@ public abstract class SharedUserInterfaceSystem : EntitySystem
         if (!_timing.IsFirstTimePredicted)
             return;
 
-        EntityManager.RaisePredictiveEvent(new BoundUIWrapMessage(GetNetEntity(entity.Owner), new CloseBoundInterfaceMessage(), key));
+        RaisePredictiveEvent(new BoundUIWrapMessage(GetNetEntity(entity.Owner), new CloseBoundInterfaceMessage(), key));
     }
 
     /// <summary>
@@ -685,7 +685,7 @@ public abstract class SharedUserInterfaceSystem : EntitySystem
             {
                 // Not guaranteed to open so rely upon the event handling it.
                 // Also lets client request it to be opened remotely too.
-                EntityManager.RaisePredictiveEvent(new BoundUIWrapMessage(GetNetEntity(entity.Owner), new OpenBoundInterfaceMessage(), key));
+                RaisePredictiveEvent(new BoundUIWrapMessage(GetNetEntity(entity.Owner), new OpenBoundInterfaceMessage(), key));
             }
         }
         else

Robust.Shared/GameObjects/Systems/TimerSystem.cs

@@ -12,7 +12,7 @@ namespace Robust.Shared.GameObjects
             base.Update(frameTime);
 
             // Avoid a collection was modified while enumerating.
-            var timers = EntityManager.EntityQueryEnumerator<TimerComponent>();
+            var timers = EntityQueryEnumerator<TimerComponent>();
             var timersList = new ValueList<(EntityUid, TimerComponent)>();
             while (timers.MoveNext(out var uid, out var timer))
             {
@@ -28,7 +28,7 @@ namespace Robust.Shared.GameObjects
             {
                 if (!timer.Deleted && !EntityManager.Deleted(uid) && timer.RemoveOnEmpty && timer.TimerCount == 0)
                 {
-                    EntityManager.RemoveComponent<TimerComponent>(uid);
+                    RemComp<TimerComponent>(uid);
                 }
             }
         }

Robust.Shared/Localization/LocalizationManager.Functions.cs

@@ -170,10 +170,8 @@ namespace Robust.Shared.Localization
             if (args.Args.Count < 1) return new LocValueString(nameof(Gender.Neuter));
 
             ILocValue entity0 = args.Args[0];
-            if (entity0.Value != null)
+            if (entity0.Value is EntityUid entity)
             {
-                EntityUid entity = (EntityUid)entity0.Value;
-
                 if (_entMan.TryGetComponent(entity, out GrammarComponent? grammar) && grammar.Gender.HasValue)
                 {
                     return new LocValueString(grammar.Gender.Value.ToString().ToLowerInvariant());
@@ -246,10 +244,8 @@ namespace Robust.Shared.Localization
             if (args.Args.Count < 1) return new LocValueString(GetString("zzzz-counter-default"));
 
             ILocValue entity0 = args.Args[0];
-            if (entity0.Value != null)
+            if (entity0.Value is EntityUid entity)
             {
-                EntityUid entity = (EntityUid)entity0.Value;
-
                 if (TryGetEntityLocAttrib(entity, "counter", out var counter))
                 {
                     return new LocValueString(counter);
@@ -292,9 +288,8 @@ namespace Robust.Shared.Localization
             if (args.Args.Count < 2) return new LocValueString("other");
 
             ILocValue entity0 = args.Args[0];
-            if (entity0.Value != null)
+            if (entity0.Value is EntityUid entity)
             {
-                EntityUid entity = (EntityUid)entity0.Value;
                 ILocValue attrib0 = args.Args[1];
                 if (TryGetEntityLocAttrib(entity, attrib0.Format(new LocContext(bundle)), out var attrib))
                 {
@@ -313,10 +308,8 @@ namespace Robust.Shared.Localization
             if (args.Args.Count < 1) return new LocValueString("false");
 
             ILocValue entity0 = args.Args[0];
-            if (entity0.Value != null)
+            if (entity0.Value is EntityUid entity)
             {
-                EntityUid entity = (EntityUid)entity0.Value;
-
                 if (_entMan.TryGetComponent(entity, out GrammarComponent? grammar) && grammar.ProperNoun.HasValue)
                 {
                     return new LocValueString(grammar.ProperNoun.Value.ToString().ToLowerInvariant());

Robust.Shared/Physics/Systems/FixtureSystem.cs

@@ -257,7 +257,7 @@ namespace Robust.Shared.Physics.Systems
             if (args.Current is not FixtureManagerComponentState state)
                 return;
 
-            if (!EntityManager.TryGetComponent(uid, out PhysicsComponent? physics))
+            if (!TryComp(uid, out PhysicsComponent? physics))
             {
                 Log.Error($"Tried to apply fixture state for an entity without physics: {ToPrettyString(uid)}");
                 return;

Robust.Shared/Physics/Systems/SharedJointSystem.cs

@@ -121,7 +121,7 @@ public abstract partial class SharedJointSystem : EntitySystem
         foreach (var joint in _dirtyJoints)
         {
             if (joint.Comp.Deleted || joint.Comp.JointCount != 0) continue;
-            EntityManager.RemoveComponent<JointComponent>(joint);
+            RemComp<JointComponent>(joint);
         }
 
         _dirtyJoints.Clear();
@@ -551,7 +551,7 @@ public abstract partial class SharedJointSystem : EntitySystem
             _physics.WakeBody(uidA);
         }
 
-        if (EntityManager.TryGetComponent<PhysicsComponent>(bodyBUid, out var bodyB) &&
+        if (TryComp<PhysicsComponent>(bodyBUid, out var bodyB) &&
             MetaData(bodyBUid).EntityLifeStage < EntityLifeStage.Terminating)
         {
             var uidB = jointComponentB.Relay ?? bodyBUid;

Robust.Shared/Physics/Systems/SharedPhysicsSystem.Island.cs

@@ -633,7 +633,7 @@ public abstract partial class SharedPhysicsSystem
         );
 
         // We'll sort islands from internally parallel (due to lots of contacts) to running all the islands in parallel
-        islands.Sort((x, y) => InternalParallel(y).CompareTo(InternalParallel(x)));
+        islands.Sort(static (x, y) => InternalParallel(y).CompareTo(InternalParallel(x)));
 
         var totalBodies = 0;
         var actualIslands = islands.ToArray();
@@ -904,16 +904,48 @@ public abstract partial class SharedPhysicsSystem
 
         if (options != null)
         {
-            const int FinaliseBodies = 32;
-            var batches = (int)MathF.Ceiling((float) bodyCount / FinaliseBodies);
-
-            Parallel.For(0, batches, options, i =>
+            // Isolate to avoid delegate capture allocation unless we're actually processing parallel here.
+            static void ProcessParallelInternal(
+                SharedPhysicsSystem system,
+                ParallelOptions options,
+                int bodyCount,
+                int offset,
+                List<Entity<PhysicsComponent, TransformComponent>> bodies,
+                Vector2[] positions,
+                float[] angles,
+                Vector2[] solvedPositions,
+                float[] solvedAngles)
             {
-                var start = i * FinaliseBodies;
-                var end = Math.Min(bodyCount, start + FinaliseBodies);
+                const int FinaliseBodies = 32;
+                var batches = (int)MathF.Ceiling((float) bodyCount / FinaliseBodies);
 
-                FinalisePositions(start, end, offset, bodies,  positions, angles, solvedPositions, solvedAngles);
-            });
+                Parallel.For(0, batches, options, i =>
+                {
+                    var start = i * FinaliseBodies;
+                    var end = Math.Min(bodyCount, start + FinaliseBodies);
+
+                    system.FinalisePositions(
+                        start,
+                        end,
+                        offset,
+                        bodies,
+                        positions,
+                        angles,
+                        solvedPositions,
+                        solvedAngles);
+                });
+            }
+
+            ProcessParallelInternal(
+                this,
+                options,
+                bodyCount,
+                offset,
+                bodies,
+                positions,
+                angles,
+                solvedPositions,
+                solvedAngles);
         }
         else
         {

Robust.Shared/Prototypes/PrototypeManager.ValidateFields.cs

@@ -63,7 +63,7 @@ public partial class PrototypeManager
         Dictionary<Type, HashSet<string>> prototypes)
     {
         DebugTools.Assert(field.IsStatic);
-        DebugTools.Assert(!field.HasCustomAttribute<DataFieldAttribute>(), "Datafields should not be static");
+        DebugTools.Assert(!field.HasCustomAttribute<DataFieldAttribute>(), $"Datafields should not be static. Field: {field.Name} in Type: {field.DeclaringType}");
 
         // Is this even a prototype id related field?
         if (!TryGetFieldPrototype(field, out var proto))

Robust.Shared/Serialization/TypeSerializers/Implementations/TimespanSerializer.cs

@@ -9,6 +9,7 @@ using Robust.Shared.Serialization.Markdown;
 using Robust.Shared.Serialization.Markdown.Validation;
 using Robust.Shared.Serialization.Markdown.Value;
 using Robust.Shared.Serialization.TypeSerializers.Interfaces;
+using Robust.Shared.Utility;
 
 namespace Robust.Shared.Serialization.TypeSerializers.Implementations;
 
@@ -74,7 +75,7 @@ public sealed class TimespanSerializer : ITypeSerializer<TimeSpan, ValueDataNode
 
         // A lot of the checks will be for plain numbers, so might as well rule them out right away, instead of
         // running all the other checks on them. They will need to get parsed later anyway, if they weren't now.
-        if (double.TryParse(node.Value, out var v))
+        if (Parse.TryDouble(node.Value, out var v))
         {
             timeSpan = TimeSpan.FromSeconds(v);
             return true;
@@ -85,7 +86,7 @@ public sealed class TimespanSerializer : ITypeSerializer<TimeSpan, ValueDataNode
             return false;
 
         // If the input without the last character is still not a valid number, exit
-        if (!double.TryParse(node.Value.AsSpan()[..^1], out var number))
+        if (!Parse.TryDouble(node.Value.AsSpan()[..^1], out var number))
             return false;
 
         // Check the last character of the input for time unit indicators

Robust.Shared/Toolshed/Commands/Entities/SpawnCommand.cs

@@ -1,8 +1,11 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Numerics;
+using Robust.Shared.IoC;
+using Robust.Shared.Containers;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Map;
+using Robust.Shared.Physics.Components;
 using Robust.Shared.Prototypes;
 
 namespace Robust.Shared.Toolshed.Commands.Entities;
@@ -10,7 +13,10 @@ namespace Robust.Shared.Toolshed.Commands.Entities;
 [ToolshedCommand]
 internal sealed class SpawnCommand : ToolshedCommand
 {
+    private SharedContainerSystem? sharedContainerSystem = null;
+
     #region spawn:at implementations
+
     [CommandImplementation("at")]
     public EntityUid SpawnAt([PipedArgument] EntityCoordinates target, EntProtoId proto)
     {
@@ -20,9 +26,11 @@ internal sealed class SpawnCommand : ToolshedCommand
     [CommandImplementation("at")]
     public IEnumerable<EntityUid> SpawnAt([PipedArgument] IEnumerable<EntityCoordinates> target, EntProtoId proto)
         => target.Select(x => SpawnAt(x, proto));
+
     #endregion
 
     #region spawn:on implementations
+
     [CommandImplementation("on")]
     public EntityUid SpawnOn([PipedArgument] EntityUid target, EntProtoId proto)
     {
@@ -32,9 +40,38 @@ internal sealed class SpawnCommand : ToolshedCommand
     [CommandImplementation("on")]
     public IEnumerable<EntityUid> SpawnOn([PipedArgument] IEnumerable<EntityUid> target, EntProtoId proto)
         => target.Select(x => SpawnOn(x, proto));
+
+    #endregion
+
+    #region spawn:in implementations
+
+    [CommandImplementation("in")]
+    public EntityUid SpawnIn([PipedArgument] EntityUid target, string containerId, EntProtoId proto)
+    {
+        var spawned = SpawnOn(target, proto);
+        if (!TryComp<TransformComponent>(spawned, out var transformComponent) ||
+            !TryComp<MetaDataComponent>(spawned, out var metaDataComp) ||
+            !TryComp<PhysicsComponent>(spawned, out var physicsComponent))
+            return spawned;
+        sharedContainerSystem ??= EntityManager.System<SharedContainerSystem>();
+        var container = sharedContainerSystem.GetContainer(target, containerId);
+        sharedContainerSystem.InsertOrDrop((spawned, transformComponent, metaDataComp, physicsComponent),
+            container
+        );
+        return spawned;
+    }
+
+    [CommandImplementation("in")]
+    public IEnumerable<EntityUid> SpawnIn(
+        [PipedArgument] IEnumerable<EntityUid> target,
+        string containerId,
+        EntProtoId proto)
+        => target.Select(x => SpawnIn(x, containerId, proto));
+
     #endregion
 
     #region spawn:attached implementations
+
     [CommandImplementation("attached")]
     public EntityUid SpawnIn([PipedArgument] EntityUid target, EntProtoId proto)
     {
@@ -44,5 +81,6 @@ internal sealed class SpawnCommand : ToolshedCommand
     [CommandImplementation("attached")]
     public IEnumerable<EntityUid> SpawnIn([PipedArgument] IEnumerable<EntityUid> target, EntProtoId proto)
         => target.Select(x => SpawnIn(x, proto));
+
     #endregion
 }

Robust.UnitTesting/Shared/Resources/WritableDirProviderTest.cs

@@ -24,7 +24,7 @@ namespace Robust.UnitTesting.Shared.Resources
             _testDir = Directory.CreateDirectory(_testDirPath);
             var subDir = Path.Combine(_testDirPath, "writable");
 
-            _dirProvider = new WritableDirProvider(Directory.CreateDirectory(subDir));
+            _dirProvider = new WritableDirProvider(Directory.CreateDirectory(subDir), hideRootDir: false);
         }
 
         [OneTimeTearDown]

Schemas/rga_validators.py

@@ -14,6 +14,7 @@ class License(Validator):
         "CC-BY-NC-SA-4.0",
         "CC-BY-ND-3.0",
         "CC-BY-ND-4.0",
+        "CC-BY-NC-ND-4.0",
         "CC0-1.0",
         "MIT",
         "Custom" # implies that the license is described in the copyright field.
@@ -27,4 +28,4 @@ class Url(Validator):
 
     def _is_valid(self, value):
         # Source field is required to ensure its not neglected, but there may be no applicable URL
-        return (value == "NA") or validators.url(value)
+        return (value == "NA") or validators.url(value)