diff --git a/Iceshrimp.Backend/Controllers/ActivityPubController.cs b/Iceshrimp.Backend/Controllers/ActivityPubController.cs
index 000d0268..bf151c64 100644
--- a/Iceshrimp.Backend/Controllers/ActivityPubController.cs
+++ b/Iceshrimp.Backend/Controllers/ActivityPubController.cs
@@ -1,8 +1,8 @@
 using System.Net.Mime;
 using Iceshrimp.Backend.Controllers.Attributes;
-using Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
 using Iceshrimp.Backend.Controllers.Schemas;
 using Iceshrimp.Backend.Core.Database;
+using Iceshrimp.Backend.Core.Federation.ActivityPub;
 using Iceshrimp.Backend.Core.Federation.ActivityStreams;
 using Iceshrimp.Backend.Core.Federation.ActivityStreams.Types;
 using Iceshrimp.Backend.Core.Middleware;
diff --git a/Iceshrimp.Backend/Controllers/Renderers/Entity/NoteRenderer.cs b/Iceshrimp.Backend/Controllers/Renderers/NoteRenderer.cs
similarity index 87%
rename from Iceshrimp.Backend/Controllers/Renderers/Entity/NoteRenderer.cs
rename to Iceshrimp.Backend/Controllers/Renderers/NoteRenderer.cs
index 3a44ae1b..9208b865 100644
--- a/Iceshrimp.Backend/Controllers/Renderers/Entity/NoteRenderer.cs
+++ b/Iceshrimp.Backend/Controllers/Renderers/NoteRenderer.cs
@@ -1,7 +1,7 @@
 using Iceshrimp.Backend.Controllers.Schemas;
 using Iceshrimp.Backend.Core.Database.Tables;
 
-namespace Iceshrimp.Backend.Controllers.Renderers.Entity;
+namespace Iceshrimp.Backend.Controllers.Renderers;
 
 public class NoteRenderer {
 	public static NoteResponse RenderOne(Note note) {
diff --git a/Iceshrimp.Backend/Controllers/Renderers/Entity/TimelineRenderer.cs b/Iceshrimp.Backend/Controllers/Renderers/TimelineRenderer.cs
similarity index 83%
rename from Iceshrimp.Backend/Controllers/Renderers/Entity/TimelineRenderer.cs
rename to Iceshrimp.Backend/Controllers/Renderers/TimelineRenderer.cs
index 05fd10fa..48bcc278 100644
--- a/Iceshrimp.Backend/Controllers/Renderers/Entity/TimelineRenderer.cs
+++ b/Iceshrimp.Backend/Controllers/Renderers/TimelineRenderer.cs
@@ -1,7 +1,7 @@
 using Iceshrimp.Backend.Controllers.Schemas;
 using Iceshrimp.Backend.Core.Database.Tables;
 
-namespace Iceshrimp.Backend.Controllers.Renderers.Entity;
+namespace Iceshrimp.Backend.Controllers.Renderers;
 
 public class TimelineRenderer {
 	public static TimelineResponse Render(IEnumerable<Note> notes, int limit) {
diff --git a/Iceshrimp.Backend/Controllers/Renderers/Entity/UserRenderer.cs b/Iceshrimp.Backend/Controllers/Renderers/UserRenderer.cs
similarity index 88%
rename from Iceshrimp.Backend/Controllers/Renderers/Entity/UserRenderer.cs
rename to Iceshrimp.Backend/Controllers/Renderers/UserRenderer.cs
index c6d80478..bc931286 100644
--- a/Iceshrimp.Backend/Controllers/Renderers/Entity/UserRenderer.cs
+++ b/Iceshrimp.Backend/Controllers/Renderers/UserRenderer.cs
@@ -1,7 +1,7 @@
 using Iceshrimp.Backend.Controllers.Schemas;
 using Iceshrimp.Backend.Core.Database.Tables;
 
-namespace Iceshrimp.Backend.Controllers.Renderers.Entity;
+namespace Iceshrimp.Backend.Controllers.Renderers;
 
 public class UserRenderer {
 	public static UserResponse RenderOne(User user) {
diff --git a/Iceshrimp.Backend/Controllers/UserController.cs b/Iceshrimp.Backend/Controllers/UserController.cs
index cc93b036..4c1ffec0 100644
--- a/Iceshrimp.Backend/Controllers/UserController.cs
+++ b/Iceshrimp.Backend/Controllers/UserController.cs
@@ -1,4 +1,4 @@
-using Iceshrimp.Backend.Controllers.Renderers.Entity;
+using Iceshrimp.Backend.Controllers.Renderers;
 using Iceshrimp.Backend.Controllers.Schemas;
 using Iceshrimp.Backend.Core.Database;
 using Microsoft.AspNetCore.Mvc;
diff --git a/Iceshrimp.Backend/Core/Extensions/ServiceExtensions.cs b/Iceshrimp.Backend/Core/Extensions/ServiceExtensions.cs
index 8bd725d6..302e6594 100644
--- a/Iceshrimp.Backend/Core/Extensions/ServiceExtensions.cs
+++ b/Iceshrimp.Backend/Core/Extensions/ServiceExtensions.cs
@@ -1,4 +1,3 @@
-using Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
 using Iceshrimp.Backend.Core.Configuration;
 using Iceshrimp.Backend.Core.Database;
 using Iceshrimp.Backend.Core.Federation.ActivityPub;
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs
index 4b1d8339..b350a8e3 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityHandlerService.cs
@@ -1,4 +1,3 @@
-using Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
 using Iceshrimp.Backend.Core.Database;
 using Iceshrimp.Backend.Core.Database.Tables;
 using Iceshrimp.Backend.Core.Federation.ActivityStreams;
@@ -27,18 +26,15 @@ public class ActivityHandlerService(
 		//TODO: validate inboxUserId
 
 		switch (activity.Type) {
-			case "https://www.w3.org/ns/activitystreams#Create": {
+			case ASActivity.Types.Create: {
 				if (activity.Object is ASNote note) return noteSvc.ProcessNote(note, activity.Actor);
 				throw new NotImplementedException();
 			}
-			case "https://www.w3.org/ns/activitystreams#Like": {
-				throw new NotImplementedException();
-			}
-			case "https://www.w3.org/ns/activitystreams#Follow": {
+			case ASActivity.Types.Follow: {
 				if (activity.Object is { } obj) return Follow(obj, activity.Actor, activity.Id);
 				throw GracefulException.UnprocessableEntity("Follow activity object is invalid");
 			}
-			case "https://www.w3.org/ns/activitystreams#Unfollow": {
+			case ASActivity.Types.Unfollow: {
 				if (activity.Object is { } obj) return Unfollow(obj, activity.Actor, activity.Id);
 				throw GracefulException.UnprocessableEntity("Unfollow activity object is invalid");
 			}
diff --git a/Iceshrimp.Backend/Controllers/Renderers/ActivityPub/ActivityRenderer.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs
similarity index 93%
rename from Iceshrimp.Backend/Controllers/Renderers/ActivityPub/ActivityRenderer.cs
rename to Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs
index c5c0e268..cf5f9ace 100644
--- a/Iceshrimp.Backend/Controllers/Renderers/ActivityPub/ActivityRenderer.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs
@@ -2,7 +2,7 @@ using Iceshrimp.Backend.Core.Configuration;
 using Iceshrimp.Backend.Core.Federation.ActivityStreams.Types;
 using Microsoft.Extensions.Options;
 
-namespace Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
+namespace Iceshrimp.Backend.Core.Federation.ActivityPub;
 
 public class ActivityRenderer(IOptions<Config.InstanceSection> config) {
 	public static ASActivity RenderCreate(ASObject obj, ASObject actor) {
diff --git a/Iceshrimp.Backend/Controllers/Renderers/ActivityPub/NoteRenderer.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/NoteRenderer.cs
similarity index 93%
rename from Iceshrimp.Backend/Controllers/Renderers/ActivityPub/NoteRenderer.cs
rename to Iceshrimp.Backend/Core/Federation/ActivityPub/NoteRenderer.cs
index 7b4160f7..16241035 100644
--- a/Iceshrimp.Backend/Controllers/Renderers/ActivityPub/NoteRenderer.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/NoteRenderer.cs
@@ -3,7 +3,7 @@ using Iceshrimp.Backend.Core.Database.Tables;
 using Iceshrimp.Backend.Core.Federation.ActivityStreams.Types;
 using Microsoft.Extensions.Options;
 
-namespace Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
+namespace Iceshrimp.Backend.Core.Federation.ActivityPub;
 
 public class NoteRenderer(IOptions<Config.InstanceSection> config) {
 	public ASNote Render(Note note) {
diff --git a/Iceshrimp.Backend/Controllers/Renderers/ActivityPub/UserRenderer.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/UserRenderer.cs
similarity index 97%
rename from Iceshrimp.Backend/Controllers/Renderers/ActivityPub/UserRenderer.cs
rename to Iceshrimp.Backend/Core/Federation/ActivityPub/UserRenderer.cs
index 0c0587a9..30500ae1 100644
--- a/Iceshrimp.Backend/Controllers/Renderers/ActivityPub/UserRenderer.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/UserRenderer.cs
@@ -7,7 +7,7 @@ using Iceshrimp.Backend.Core.Middleware;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Options;
 
-namespace Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
+namespace Iceshrimp.Backend.Core.Federation.ActivityPub;
 
 public class UserRenderer(IOptions<Config.InstanceSection> config, DatabaseContext db) {
 	public async Task<ASActor> Render(User user) {
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs
index 902ad006..92a1ae6c 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs
@@ -11,6 +11,18 @@ public class ASActivity : ASObject {
 	[J("https://www.w3.org/ns/activitystreams#object")]
 	[JC(typeof(ASObjectConverter))]
 	public ASObject? Object { get; set; }
+
+	public static class Types {
+		private const string Ns = "https://www.w3.org/ns/activitystreams";
+
+		public const string Create   = $"{Ns}#Create";
+		public const string Delete   = $"{Ns}#Delete";
+		public const string Follow   = $"{Ns}#Follow";
+		public const string Unfollow = $"{Ns}#Unfollow";
+		public const string Accept   = $"{Ns}#Accept";
+		public const string Undo     = $"{Ns}#Undo";
+		public const string Like     = $"{Ns}#Like";
+	}
 }
 
 public sealed class ASActivityConverter : ASSerializer.ListSingleObjectConverter<ASActivity>;
\ No newline at end of file
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActor.cs b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActor.cs
index 2be73ce6..8520c37f 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActor.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActor.cs
@@ -12,11 +12,7 @@ public class ASActor : ASObject {
 	private const int SummaryLength     = 2048;
 
 	private static readonly List<string> ActorTypes = [
-		"https://www.w3.org/ns/activitystreams#Person",
-		"https://www.w3.org/ns/activitystreams#Service",
-		"https://www.w3.org/ns/activitystreams#Group",
-		"https://www.w3.org/ns/activitystreams#Organization",
-		"https://www.w3.org/ns/activitystreams#Application"
+		Types.Person, Types.Service, Types.Group, Types.Organization, Types.Application
 	];
 
 	[J("https://misskey-hub.net/ns#_misskey_summary")]
@@ -136,6 +132,16 @@ public class ASActor : ASObject {
 			_               => null
 		};
 	}
+
+	public static class Types {
+		private const string Ns = "https://www.w3.org/ns/activitystreams";
+
+		public const string Application  = $"{Ns}#Application";
+		public const string Group        = $"{Ns}#Group";
+		public const string Organization = $"{Ns}#Organization";
+		public const string Person       = $"{Ns}#Person";
+		public const string Service      = $"{Ns}#Service";
+	}
 }
 
 public class ASActorConverter : ASSerializer.ListSingleObjectConverter<ASActor>;
\ No newline at end of file
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASNote.cs b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASNote.cs
index ae3c1eb0..673eed82 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASNote.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASNote.cs
@@ -53,4 +53,10 @@ public class ASNote : ASObject {
 
 		return Note.NoteVisibility.Specified;
 	}
+
+	public static class Types {
+		private const string Ns = "https://www.w3.org/ns/activitystreams";
+
+		public const string Note = $"{Ns}#Note";
+	}
 }
\ No newline at end of file
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASObject.cs b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASObject.cs
index d3e9aebb..3114d496 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASObject.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASObject.cs
@@ -15,17 +15,23 @@ public class ASObject {
 
 	//FIXME: don't recurse creates and co
 	public static ASObject? Deserialize(JToken token) {
+		const string ns = "https://www.w3.org/ns/activitystreams";
 		return token.Type switch {
 			JTokenType.Object => token["@type"]?[0]?.Value<string>() switch {
-				"https://www.w3.org/ns/activitystreams#Application"  => token.ToObject<ASActor>(),
-				"https://www.w3.org/ns/activitystreams#Group"        => token.ToObject<ASActor>(),
-				"https://www.w3.org/ns/activitystreams#Organization" => token.ToObject<ASActor>(),
-				"https://www.w3.org/ns/activitystreams#Person"       => token.ToObject<ASActor>(),
-				"https://www.w3.org/ns/activitystreams#Service"      => token.ToObject<ASActor>(),
-				"https://www.w3.org/ns/activitystreams#Note"         => token.ToObject<ASNote>(),
-				"https://www.w3.org/ns/activitystreams#Create"       => token.ToObject<ASActivity>(),
-				"https://www.w3.org/ns/activitystreams#Follow"       => token.ToObject<ASActivity>(),
-				_                                                    => token.ToObject<ASObject>()
+				ASActor.Types.Person       => token.ToObject<ASActor>(),
+				ASActor.Types.Service      => token.ToObject<ASActor>(),
+				ASActor.Types.Group        => token.ToObject<ASActor>(),
+				ASActor.Types.Organization => token.ToObject<ASActor>(),
+				ASActor.Types.Application  => token.ToObject<ASActor>(),
+				ASNote.Types.Note          => token.ToObject<ASNote>(),
+				ASActivity.Types.Create    => token.ToObject<ASActivity>(),
+				ASActivity.Types.Delete    => token.ToObject<ASActivity>(),
+				ASActivity.Types.Follow    => token.ToObject<ASActivity>(),
+				ASActivity.Types.Unfollow  => token.ToObject<ASActivity>(),
+				ASActivity.Types.Accept    => token.ToObject<ASActivity>(),
+				ASActivity.Types.Undo      => token.ToObject<ASActivity>(),
+				ASActivity.Types.Like      => token.ToObject<ASActivity>(),
+				_                          => token.ToObject<ASObject>()
 			},
 			JTokenType.Array  => Deserialize(token.First()),
 			JTokenType.String => new ASObject { Id = token.Value<string>() ?? "" },
diff --git a/Iceshrimp.Backend/Core/Services/NoteService.cs b/Iceshrimp.Backend/Core/Services/NoteService.cs
index faf6896d..e6c6b84e 100644
--- a/Iceshrimp.Backend/Core/Services/NoteService.cs
+++ b/Iceshrimp.Backend/Core/Services/NoteService.cs
@@ -1,4 +1,3 @@
-using Iceshrimp.Backend.Controllers.Renderers.ActivityPub;
 using Iceshrimp.Backend.Core.Configuration;
 using Iceshrimp.Backend.Core.Database;
 using Iceshrimp.Backend.Core.Database.Tables;
diff --git a/Iceshrimp.Tests/MockObjects.cs b/Iceshrimp.Tests/MockObjects.cs
index c957d66b..3f84ae50 100644
--- a/Iceshrimp.Tests/MockObjects.cs
+++ b/Iceshrimp.Tests/MockObjects.cs
@@ -11,7 +11,7 @@ namespace Iceshrimp.Tests;
 public static class MockObjects {
 	public static readonly ASActor ASActor = new() {
 		Id             = $"https://example.org/users/{IdHelpers.GenerateSlowflakeId()}",
-		Type           = "https://www.w3.org/ns/activitystreams#Person",
+		Type           = ASActor.Types.Person,
 		Url            = new ASLink("https://example.org/@test"),
 		Username       = "test",
 		DisplayName    = "Test account",