diff --git a/config/config.exs b/config/config.exs
index 321ea40d0d..c6cf27e9d1 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -691,6 +691,8 @@
 
 config :pleroma, :populate_hashtags_table, fault_rate_allowance: 0.01
 
+config :pleroma, :delete_context_objects, fault_rate_allowance: 0.01
+
 config :pleroma, :env, Mix.env()
 
 config :http_signatures,
diff --git a/config/description.exs b/config/description.exs
index 40053144cf..f2320e400d 100644
--- a/config/description.exs
+++ b/config/description.exs
@@ -495,6 +495,27 @@
       }
     ]
   },
+  %{
+    group: :pleroma,
+    key: :delete_context_objects,
+    type: :group,
+    description: "`delete_context_objects` background migration settings",
+    children: [
+      %{
+        key: :fault_rate_allowance,
+        type: :float,
+        description:
+          "Max accepted rate of objects that failed in the migration. Any value from 0.0 which tolerates no errors to 1.0 which will enable the feature even if context object deletion failed for all records.",
+        suggestions: [0.01]
+      },
+      %{
+        key: :sleep_interval_ms,
+        type: :integer,
+        description:
+          "Sleep interval between each chunk of processed records in order to decrease the load on the system (defaults to 0 and should be keep default on most instances)."
+      }
+    ]
+  },
   %{
     group: :pleroma,
     key: :instance,
diff --git a/lib/pleroma/activity/ir/topics.ex b/lib/pleroma/activity/ir/topics.ex
index 56c52e9d17..8249cbe271 100644
--- a/lib/pleroma/activity/ir/topics.ex
+++ b/lib/pleroma/activity/ir/topics.ex
@@ -13,6 +13,14 @@ def get_activity_topics(activity) do
     |> List.flatten()
   end
 
+  defp generate_topics(%{data: %{"type" => "ChatMessage"}}, %{data: %{"type" => "Delete"}}) do
+    ["user", "user:pleroma_chat"]
+  end
+
+  defp generate_topics(%{data: %{"type" => "ChatMessage"}}, %{data: %{"type" => "Create"}}) do
+    []
+  end
+
   defp generate_topics(%{data: %{"type" => "Answer"}}, _) do
     []
   end
@@ -21,7 +29,7 @@ defp generate_topics(object, activity) do
     ["user", "list"] ++ visibility_tags(object, activity)
   end
 
-  defp visibility_tags(object, activity) do
+  defp visibility_tags(object, %{data: %{"type" => type}} = activity) when type != "Announce" do
     case Visibility.get_visibility(activity) do
       "public" ->
         if activity.local do
@@ -31,6 +39,10 @@ defp visibility_tags(object, activity) do
         end
         |> item_creation_tags(object, activity)
 
+      "local" ->
+        ["public:local"]
+        |> item_creation_tags(object, activity)
+
       "direct" ->
         ["direct"]
 
@@ -39,6 +51,10 @@ defp visibility_tags(object, activity) do
     end
   end
 
+  defp visibility_tags(_object, _activity) do
+    []
+  end
+
   defp item_creation_tags(tags, object, %{data: %{"type" => "Create"}} = activity) do
     tags ++
       remote_topics(activity) ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
@@ -63,7 +79,18 @@ defp remote_topics(_), do: []
 
   defp attachment_topics(%{data: %{"attachment" => []}}, _act), do: []
 
-  defp attachment_topics(_object, %{local: true}), do: ["public:media", "public:local:media"]
+  defp attachment_topics(_object, %{local: true} = activity) do
+    case Visibility.get_visibility(activity) do
+      "public" ->
+        ["public:media", "public:local:media"]
+
+      "local" ->
+        ["public:local:media"]
+
+      _ ->
+        []
+    end
+  end
 
   defp attachment_topics(_object, %{actor: actor}) when is_binary(actor),
     do: ["public:media", "public:remote:media:" <> URI.parse(actor).host]
diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index ae70c0b02b..caa1f2d589 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -252,7 +252,8 @@ defp dont_run_in_test(_) do
 
   defp background_migrators do
     [
-      Pleroma.Migrators.HashtagsTableMigrator
+      Pleroma.Migrators.HashtagsTableMigrator,
+      Pleroma.Migrators.ContextObjectsDeletionMigrator
     ]
   end
 
diff --git a/lib/pleroma/data_migration.ex b/lib/pleroma/data_migration.ex
index 59d891d8db..8451678fc4 100644
--- a/lib/pleroma/data_migration.ex
+++ b/lib/pleroma/data_migration.ex
@@ -42,4 +42,5 @@ def get_by_name(name) do
   end
 
   def populate_hashtags_table, do: get_by_name("populate_hashtags_table")
+  def delete_context_objects, do: get_by_name("delete_context_objects")
 end
diff --git a/lib/pleroma/migrators/context_objects_deletion_migrator.ex b/lib/pleroma/migrators/context_objects_deletion_migrator.ex
new file mode 100644
index 0000000000..fb224795a4
--- /dev/null
+++ b/lib/pleroma/migrators/context_objects_deletion_migrator.ex
@@ -0,0 +1,139 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Migrators.ContextObjectsDeletionMigrator do
+  defmodule State do
+    use Pleroma.Migrators.Support.BaseMigratorState
+
+    @impl Pleroma.Migrators.Support.BaseMigratorState
+    defdelegate data_migration(), to: Pleroma.DataMigration, as: :delete_context_objects
+  end
+
+  use Pleroma.Migrators.Support.BaseMigrator
+
+  alias Pleroma.Migrators.Support.BaseMigrator
+  alias Pleroma.Object
+
+  @doc "This migration removes objects created exclusively for contexts, containing only an `id` field."
+
+  @impl BaseMigrator
+  def feature_config_path, do: [:features, :delete_context_objects]
+
+  @impl BaseMigrator
+  def fault_rate_allowance, do: Config.get([:delete_context_objects, :fault_rate_allowance], 0)
+
+  @impl BaseMigrator
+  def perform do
+    data_migration_id = data_migration_id()
+    max_processed_id = get_stat(:max_processed_id, 0)
+
+    Logger.info("Deleting context objects from `objects` (from oid: #{max_processed_id})...")
+
+    query()
+    |> where([object], object.id > ^max_processed_id)
+    |> Repo.chunk_stream(100, :batches, timeout: :infinity)
+    |> Stream.each(fn objects ->
+      object_ids = Enum.map(objects, & &1.id)
+
+      results = Enum.map(object_ids, &delete_context_object(&1))
+
+      failed_ids =
+        results
+        |> Enum.filter(&(elem(&1, 0) == :error))
+        |> Enum.map(&elem(&1, 1))
+
+      chunk_affected_count =
+        results
+        |> Enum.filter(&(elem(&1, 0) == :ok))
+        |> length()
+
+      for failed_id <- failed_ids do
+        _ =
+          Repo.query(
+            "INSERT INTO data_migration_failed_ids(data_migration_id, record_id) " <>
+              "VALUES ($1, $2) ON CONFLICT DO NOTHING;",
+            [data_migration_id, failed_id]
+          )
+      end
+
+      _ =
+        Repo.query(
+          "DELETE FROM data_migration_failed_ids " <>
+            "WHERE data_migration_id = $1 AND record_id = ANY($2)",
+          [data_migration_id, object_ids -- failed_ids]
+        )
+
+      max_object_id = Enum.at(object_ids, -1)
+
+      put_stat(:max_processed_id, max_object_id)
+      increment_stat(:iteration_processed_count, length(object_ids))
+      increment_stat(:processed_count, length(object_ids))
+      increment_stat(:failed_count, length(failed_ids))
+      increment_stat(:affected_count, chunk_affected_count)
+      put_stat(:records_per_second, records_per_second())
+      persist_state()
+
+      # A quick and dirty approach to controlling the load this background migration imposes
+      sleep_interval = Config.get([:delete_context_objects, :sleep_interval_ms], 0)
+      Process.sleep(sleep_interval)
+    end)
+    |> Stream.run()
+  end
+
+  @impl BaseMigrator
+  def query do
+    # Context objects have no activity type, and only one field, `id`.
+    # Only those context objects are without types.
+    from(
+      object in Object,
+      where: fragment("(?)->'type' IS NULL", object.data),
+      select: %{
+        id: object.id
+      }
+    )
+  end
+
+  @spec delete_context_object(integer()) :: {:ok | :error, integer()}
+  defp delete_context_object(id) do
+    result =
+      %Object{id: id}
+      |> Repo.delete()
+      |> elem(0)
+
+    {result, id}
+  end
+
+  @impl BaseMigrator
+  def retry_failed do
+    data_migration_id = data_migration_id()
+
+    failed_objects_query()
+    |> Repo.chunk_stream(100, :one)
+    |> Stream.each(fn object ->
+      with {res, _} when res != :error <- delete_context_object(object.id) do
+        _ =
+          Repo.query(
+            "DELETE FROM data_migration_failed_ids " <>
+              "WHERE data_migration_id = $1 AND record_id = $2",
+            [data_migration_id, object.id]
+          )
+      end
+    end)
+    |> Stream.run()
+
+    put_stat(:failed_count, failures_count())
+    persist_state()
+
+    force_continue()
+  end
+
+  defp failed_objects_query do
+    from(o in Object)
+    |> join(:inner, [o], dmf in fragment("SELECT * FROM data_migration_failed_ids"),
+      on: dmf.record_id == o.id
+    )
+    |> where([_o, dmf], dmf.data_migration_id == ^data_migration_id())
+    |> order_by([o], asc: o.id)
+  end
+end
diff --git a/lib/pleroma/object.ex b/lib/pleroma/object.ex
index 9f37b22856..489081ec94 100644
--- a/lib/pleroma/object.ex
+++ b/lib/pleroma/object.ex
@@ -207,10 +207,6 @@ def get_cached_by_ap_id(ap_id) do
     end
   end
 
-  def context_mapping(context) do
-    Object.change(%Object{}, %{data: %{"id" => context}})
-  end
-
   def make_tombstone(%Object{data: %{"id" => id, "type" => type}}, deleted \\ DateTime.utc_now()) do
     %ObjectTombstone{
       id: id,
diff --git a/lib/pleroma/signature.ex b/lib/pleroma/signature.ex
index dbe6fd209f..ff0c568564 100644
--- a/lib/pleroma/signature.ex
+++ b/lib/pleroma/signature.ex
@@ -10,17 +10,14 @@ defmodule Pleroma.Signature do
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.ActivityPub
 
+  @known_suffixes ["/publickey", "/main-key"]
+
   def key_id_to_actor_id(key_id) do
     uri =
-      URI.parse(key_id)
+      key_id
+      |> URI.parse()
       |> Map.put(:fragment, nil)
-
-    uri =
-      if not is_nil(uri.path) and String.ends_with?(uri.path, "/publickey") do
-        Map.put(uri, :path, String.replace(uri.path, "/publickey", ""))
-      else
-        uri
-      end
+      |> remove_suffix(@known_suffixes)
 
     maybe_ap_id = URI.to_string(uri)
 
@@ -36,6 +33,16 @@ def key_id_to_actor_id(key_id) do
     end
   end
 
+  defp remove_suffix(uri, [test | rest]) do
+    if not is_nil(uri.path) and String.ends_with?(uri.path, test) do
+      Map.put(uri, :path, String.replace(uri.path, test, ""))
+    else
+      remove_suffix(uri, rest)
+    end
+  end
+
+  defp remove_suffix(uri, []), do: uri
+
   def fetch_public_key(conn) do
     with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
          {:ok, actor_id} <- key_id_to_actor_id(kid),
diff --git a/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex b/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex
index 37795371fa..3a260f6e67 100644
--- a/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/article_note_page_validator.ex
@@ -63,7 +63,10 @@ defp fix_replies(%{"replies" => %{"first" => %{"items" => replies}}} = data)
   defp fix_replies(%{"replies" => %{"items" => replies}} = data) when is_list(replies),
     do: Map.put(data, "replies", replies)
 
-  defp fix_replies(%{"replies" => replies} = data) when is_bitstring(replies),
+  # TODO: Pleroma does not have any support for Collections at the moment.
+  # If the `replies` field is not something the ObjectID validator can handle,
+  # the activity/object would be rejected, which is bad behavior.
+  defp fix_replies(%{"replies" => replies} = data) when not is_list(replies),
     do: Map.drop(data, ["replies"])
 
   defp fix_replies(data), do: data
@@ -119,7 +122,7 @@ def changeset(struct, data) do
   defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Article", "Note", "Page"])
-    |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
+    |> validate_required([:id, :actor, :attributedTo, :type, :context])
     |> CommonValidations.validate_any_presence([:cc, :to])
     |> CommonValidations.validate_fields_match([:actor, :attributedTo])
     |> CommonValidations.validate_actor_presence()
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fields.ex b/lib/pleroma/web/activity_pub/object_validators/common_fields.ex
index 5b6c5b7af7..a625e76caa 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_fields.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_fields.ex
@@ -52,8 +52,6 @@ defmacro status_object_fields do
       field(:summary, :string)
 
       field(:context, :string)
-      # short identifier for PleromaFE to group statuses by context
-      field(:context_id, :integer)
 
       field(:sensitive, :boolean, default: false)
       field(:replies_count, :integer, default: 0)
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
index 4f8c083ebc..add46d561d 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_fixes.ex
@@ -22,14 +22,15 @@ def cast_and_filter_recipients(message, field, follower_collection, field_fallba
   end
 
   def fix_object_defaults(data) do
-    %{data: %{"id" => context}, id: context_id} =
-      Utils.create_context(data["context"] || data["conversation"])
+    context =
+      Utils.maybe_create_context(
+        data["context"] || data["conversation"] || data["inReplyTo"] || data["id"]
+      )
 
     %User{follower_address: follower_collection} = User.get_cached_by_ap_id(data["attributedTo"])
 
     data
     |> Map.put("context", context)
-    |> Map.put("context_id", context_id)
     |> cast_and_filter_recipients("to", follower_collection)
     |> cast_and_filter_recipients("cc", follower_collection)
     |> cast_and_filter_recipients("bto", follower_collection)
diff --git a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
index c9a621cb12..2395abfd4a 100644
--- a/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex
@@ -75,7 +75,7 @@ def fix(data, meta) do
 
     data
     |> CommonFixes.fix_actor()
-    |> Map.put_new("context", object["context"])
+    |> Map.put("context", object["context"])
     |> fix_addressing(object)
   end
 
diff --git a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
index 0e99f20375..ab204f69a0 100644
--- a/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/event_validator.ex
@@ -62,7 +62,7 @@ def changeset(struct, data) do
   defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Event"])
-    |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
+    |> validate_required([:id, :actor, :attributedTo, :type, :context])
     |> CommonValidations.validate_any_presence([:cc, :to])
     |> CommonValidations.validate_fields_match([:actor, :attributedTo])
     |> CommonValidations.validate_actor_presence()
diff --git a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
index 00b85a2148..c9a93be46d 100644
--- a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
@@ -82,7 +82,7 @@ def changeset(struct, data) do
   defp validate_data(data_cng) do
     data_cng
     |> validate_inclusion(:type, ["Question"])
-    |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
+    |> validate_required([:id, :actor, :attributedTo, :type, :context])
     |> CommonValidations.validate_any_presence([:cc, :to])
     |> CommonValidations.validate_fields_match([:actor, :attributedTo])
     |> CommonValidations.validate_actor_presence()
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index e94ff2de00..ffac168751 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -154,22 +154,7 @@ def get_notified_from_object(object) do
     Notification.get_notified_from_activity(%Activity{data: object}, false)
   end
 
-  def create_context(context) do
-    context = context || generate_id("contexts")
-
-    # Ecto has problems accessing the constraint inside the jsonb,
-    # so we explicitly check for the existed object before insert
-    object = Object.get_cached_by_ap_id(context)
-
-    with true <- is_nil(object),
-         changeset <- Object.context_mapping(context),
-         {:ok, inserted_object} <- Repo.insert(changeset) do
-      inserted_object
-    else
-      _ ->
-        object
-    end
-  end
+  def maybe_create_context(context), do: context || generate_id("contexts")
 
   @doc """
   Enqueues an activity for federation if it's local
@@ -201,18 +186,16 @@ def lazy_put_activity_defaults(map, true) do
     |> Map.put_new("id", "pleroma:fakeid")
     |> Map.put_new_lazy("published", &make_date/0)
     |> Map.put_new("context", "pleroma:fakecontext")
-    |> Map.put_new("context_id", -1)
     |> lazy_put_object_defaults(true)
   end
 
   def lazy_put_activity_defaults(map, _fake?) do
-    %{data: %{"id" => context}, id: context_id} = create_context(map["context"])
+    context = maybe_create_context(map["context"])
 
     map
     |> Map.put_new_lazy("id", &generate_activity_id/0)
     |> Map.put_new_lazy("published", &make_date/0)
     |> Map.put_new("context", context)
-    |> Map.put_new("context_id", context_id)
     |> lazy_put_object_defaults(false)
   end
 
@@ -226,7 +209,6 @@ defp lazy_put_object_defaults(%{"object" => map} = activity, true)
       |> Map.put_new("id", "pleroma:fake_object_id")
       |> Map.put_new_lazy("published", &make_date/0)
       |> Map.put_new("context", activity["context"])
-      |> Map.put_new("context_id", activity["context_id"])
       |> Map.put_new("fake", true)
 
     %{activity | "object" => object}
@@ -239,7 +221,6 @@ defp lazy_put_object_defaults(%{"object" => map} = activity, _)
       |> Map.put_new_lazy("id", &generate_object_id/0)
       |> Map.put_new_lazy("published", &make_date/0)
       |> Map.put_new("context", activity["context"])
-      |> Map.put_new("context_id", activity["context_id"])
 
     %{activity | "object" => object}
   end
diff --git a/lib/pleroma/web/api_spec/schemas/status.ex b/lib/pleroma/web/api_spec/schemas/status.ex
index 7caa068608..0324532c76 100644
--- a/lib/pleroma/web/api_spec/schemas/status.ex
+++ b/lib/pleroma/web/api_spec/schemas/status.ex
@@ -148,9 +148,15 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
             description:
               "A map consisting of alternate representations of the `content` property with the key being it's mimetype. Currently the only alternate representation supported is `text/plain`"
           },
+          context: %Schema{
+            type: :string,
+            description: "The thread identifier the status is associated with"
+          },
           conversation_id: %Schema{
             type: :integer,
-            description: "The ID of the AP context the status is associated with (if any)"
+            deprecated: true,
+            description:
+              "The ID of the AP context the status is associated with (if any); deprecated, please use `context` instead"
           },
           direct_conversation_id: %Schema{
             type: :integer,
@@ -349,6 +355,7 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
       "pinned" => false,
       "pleroma" => %{
         "content" => %{"text/plain" => "foobar"},
+        "context" => "http://localhost:4001/objects/8b4c0c80-6a37-4d2a-b1b9-05a19e3875aa",
         "conversation_id" => 345_972,
         "direct_conversation_id" => nil,
         "emoji_reactions" => [],
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 5fc8c3220a..ff08143295 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -453,35 +453,6 @@ def get_report_statuses(%User{ap_id: actor}, %{status_ids: status_ids})
 
   def get_report_statuses(_, _), do: {:ok, nil}
 
-  # DEPRECATED mostly, context objects are now created at insertion time.
-  def context_to_conversation_id(context) do
-    with %Object{id: id} <- Object.get_cached_by_ap_id(context) do
-      id
-    else
-      _e ->
-        changeset = Object.context_mapping(context)
-
-        case Repo.insert(changeset) do
-          {:ok, %{id: id}} ->
-            id
-
-          # This should be solved by an upsert, but it seems ecto
-          # has problems accessing the constraint inside the jsonb.
-          {:error, _} ->
-            Object.get_cached_by_ap_id(context).id
-        end
-    end
-  end
-
-  def conversation_id_to_context(id) do
-    with %Object{data: %{"id" => context}} <- Repo.get(Object, id) do
-      context
-    else
-      _e ->
-        {:error, dgettext("errors", "No such conversation")}
-    end
-  end
-
   def validate_character_limit("" = _full_payload, [] = _attachments) do
     {:error, dgettext("errors", "Cannot post an empty status without attachments")}
   end
diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex
index fe90249a42..5fdb614a37 100644
--- a/lib/pleroma/web/mastodon_api/views/status_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/status_view.ex
@@ -80,11 +80,19 @@ defp get_quoted_activities(activities) do
     end)
   end
 
-  defp get_context_id(%{data: %{"context_id" => context_id}}) when not is_nil(context_id),
-    do: context_id
+  # DEPRECATED This field seems to be a left-over from the StatusNet era.
+  # If your application uses `pleroma.conversation_id`: this field is deprecated.
+  # It is currently stubbed instead by doing a CRC32 of the context, and
+  # clearing the MSB to avoid overflow exceptions with signed integers on the
+  # different clients using this field (Java/Kotlin code, mostly; see Husky.)
+  # This should be removed in a future version of Pleroma. Pleroma-FE currently
+  # depends on this field, as well.
+  defp get_context_id(%{data: %{"context" => context}}) when is_binary(context) do
+    use Bitwise
 
-  defp get_context_id(%{data: %{"context" => context}}) when is_binary(context),
-    do: Utils.context_to_conversation_id(context)
+    :erlang.crc32(context)
+    |> band(bnot(0x8000_0000))
+  end
 
   defp get_context_id(_), do: nil
 
@@ -425,6 +433,7 @@ def render("show.json", %{activity: %{data: %{"object" => _object}} = activity}
       pleroma: %{
         local: activity.local,
         conversation_id: get_context_id(activity),
+        context: object.data["context"],
         in_reply_to_account_acct: reply_to_user && reply_to_user.nickname,
         quote: quote_post,
         quote_url: object.data["quoteUrl"],
diff --git a/lib/pleroma/web/metadata/utils.ex b/lib/pleroma/web/metadata/utils.ex
index 8052eaa443..15414a988d 100644
--- a/lib/pleroma/web/metadata/utils.ex
+++ b/lib/pleroma/web/metadata/utils.ex
@@ -8,8 +8,8 @@ defmodule Pleroma.Web.Metadata.Utils do
   alias Pleroma.Formatter
   alias Pleroma.HTML
 
-  def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
-    content
+  defp scrub_html_and_truncate_object_field(field, object) do
+    field
     # html content comes from DB already encoded, decode first and scrub after
     |> HtmlEntities.decode()
     |> String.replace(~r/<br\s?\/?>/, " ")
@@ -19,6 +19,17 @@ def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
     |> Formatter.truncate()
   end
 
+  def scrub_html_and_truncate(%{data: %{"summary" => summary}} = object)
+      when is_binary(summary) and summary != "" do
+    summary
+    |> scrub_html_and_truncate_object_field(object)
+  end
+
+  def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
+    content
+    |> scrub_html_and_truncate_object_field(object)
+  end
+
   def scrub_html_and_truncate(content, max_length \\ 200) when is_binary(content) do
     content
     |> scrub_html
diff --git a/lib/pleroma/web/plugs/http_signature_plug.ex b/lib/pleroma/web/plugs/http_signature_plug.ex
index d023754a65..4bf3252180 100644
--- a/lib/pleroma/web/plugs/http_signature_plug.ex
+++ b/lib/pleroma/web/plugs/http_signature_plug.ex
@@ -25,21 +25,58 @@ def call(conn, _opts) do
     end
   end
 
+  defp validate_signature(conn, request_target) do
+    # Newer drafts for HTTP signatures now use @request-target instead of the
+    # old (request-target). We'll now support both for incoming signatures.
+    conn =
+      conn
+      |> put_req_header("(request-target)", request_target)
+      |> put_req_header("@request-target", request_target)
+
+    HTTPSignatures.validate_conn(conn)
+  end
+
+  defp validate_signature(conn) do
+    # This (request-target) is non-standard, but many implementations do it
+    # this way due to a misinterpretation of
+    # https://datatracker.ietf.org/doc/html/draft-cavage-http-signatures-06
+    # "path" was interpreted as not having the query, though later examples
+    # show that it must be the absolute path + query. This behavior is kept to
+    # make sure most software (Pleroma itself, Mastodon, and probably others)
+    # do not break.
+    request_target = String.downcase("#{conn.method}") <> " #{conn.request_path}"
+
+    # This is the proper way to build the @request-target, as expected by
+    # many HTTP signature libraries, clarified in the following draft:
+    # https://www.ietf.org/archive/id/draft-ietf-httpbis-message-signatures-11.html#section-2.2.6
+    # It is the same as before, but containing the query part as well.
+    proper_target = request_target <> "?#{conn.query_string}"
+
+    cond do
+      # Normal, non-standard behavior but expected by Pleroma and more.
+      validate_signature(conn, request_target) ->
+        true
+
+      # Has query string and the previous one failed: let's try the standard.
+      conn.query_string != "" ->
+        validate_signature(conn, proper_target)
+
+      # If there's no query string and signature fails, it's rotten.
+      true ->
+        false
+    end
+  end
+
   defp maybe_assign_valid_signature(conn) do
     if has_signature_header?(conn) do
-      # set (request-target) header to the appropriate value
-      # we also replace the digest header with the one we computed
-      request_target = String.downcase("#{conn.method}") <> " #{conn.request_path}"
-
+      # we replace the digest header with the one we computed in DigestPlug
       conn =
-        conn
-        |> put_req_header("(request-target)", request_target)
-        |> case do
+        case conn do
           %{assigns: %{digest: digest}} = conn -> put_req_header(conn, "digest", digest)
           conn -> conn
         end
 
-      assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
+      assign(conn, :valid_signature, validate_signature(conn))
     else
       Logger.debug("No signature header!")
       conn
diff --git a/priv/repo/migrations/20220807125023_data_migration_delete_context_objects.exs b/priv/repo/migrations/20220807125023_data_migration_delete_context_objects.exs
new file mode 100644
index 0000000000..84365dbe33
--- /dev/null
+++ b/priv/repo/migrations/20220807125023_data_migration_delete_context_objects.exs
@@ -0,0 +1,18 @@
+defmodule Pleroma.Repo.Migrations.DataMigrationDeleteContextObjects do
+  use Ecto.Migration
+
+  require Logger
+
+  def up do
+    dt = NaiveDateTime.utc_now()
+
+    execute(
+      "INSERT INTO data_migrations(name, inserted_at, updated_at) " <>
+        "VALUES ('delete_context_objects', '#{dt}', '#{dt}') ON CONFLICT DO NOTHING;"
+    )
+  end
+
+  def down do
+    execute("DELETE FROM data_migrations WHERE name = 'delete_context_objects';")
+  end
+end
diff --git a/test/fixtures/create-pleroma-reply-to-misskey-thread.json b/test/fixtures/create-pleroma-reply-to-misskey-thread.json
new file mode 100644
index 0000000000..0c31efa76e
--- /dev/null
+++ b/test/fixtures/create-pleroma-reply-to-misskey-thread.json
@@ -0,0 +1,61 @@
+{
+    "@context": [
+        "https://www.w3.org/ns/activitystreams",
+        "https://p.helene.moe/schemas/litepub-0.1.jsonld",
+        {
+            "@language": "und"
+        }
+    ],
+    "actor": "https://p.helene.moe/users/helene",
+    "attachment": [],
+    "attributedTo": "https://p.helene.moe/users/helene",
+    "cc": [
+        "https://p.helene.moe/users/helene/followers"
+    ],
+    "context": "https://p.helene.moe/contexts/cc324643-5583-4c3f-91d2-c6ed37db159d",
+    "conversation": "https://p.helene.moe/contexts/cc324643-5583-4c3f-91d2-c6ed37db159d",
+    "directMessage": false,
+    "id": "https://p.helene.moe/activities/5f80db86-a9bb-4883-9845-fbdbd1478f3a",
+    "object": {
+        "actor": "https://p.helene.moe/users/helene",
+        "attachment": [],
+        "attributedTo": "https://p.helene.moe/users/helene",
+        "cc": [
+            "https://p.helene.moe/users/helene/followers"
+        ],
+        "content": "<span class=\"h-card\"><a class=\"u-url mention\" data-user=\"AHntpQ4T3J4OSnpgMC\" href=\"https://mk.absturztau.be/@mametsuko\" rel=\"ugc\">@<span>mametsuko</span></a></span> meow",
+        "context": "https://p.helene.moe/contexts/cc324643-5583-4c3f-91d2-c6ed37db159d",
+        "conversation": "https://p.helene.moe/contexts/cc324643-5583-4c3f-91d2-c6ed37db159d",
+        "id": "https://p.helene.moe/objects/fd5910ac-d9dc-412e-8d1d-914b203296c4",
+        "inReplyTo": "https://mk.absturztau.be/notes/93e7nm8wqg",
+        "published": "2022-08-02T13:46:58.403996Z",
+        "sensitive": null,
+        "source": "@mametsuko@mk.absturztau.be meow",
+        "summary": "",
+        "tag": [
+            {
+                "href": "https://mk.absturztau.be/users/8ozbzjs3o8",
+                "name": "@mametsuko@mk.absturztau.be",
+                "type": "Mention"
+            }
+        ],
+        "to": [
+            "https://mk.absturztau.be/users/8ozbzjs3o8",
+            "https://www.w3.org/ns/activitystreams#Public"
+        ],
+        "type": "Note"
+    },
+    "published": "2022-08-02T13:46:58.403883Z",
+    "tag": [
+        {
+            "href": "https://mk.absturztau.be/users/8ozbzjs3o8",
+            "name": "@mametsuko@mk.absturztau.be",
+            "type": "Mention"
+        }
+    ],
+    "to": [
+        "https://mk.absturztau.be/users/8ozbzjs3o8",
+        "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "type": "Create"
+}
\ No newline at end of file
diff --git a/test/fixtures/tesla_mock/helene@p.helene.moe.json b/test/fixtures/tesla_mock/helene@p.helene.moe.json
new file mode 100644
index 0000000000..d7444817fd
--- /dev/null
+++ b/test/fixtures/tesla_mock/helene@p.helene.moe.json
@@ -0,0 +1,50 @@
+{
+    "@context": [
+        "https://www.w3.org/ns/activitystreams",
+        "https://p.helene.moe/schemas/litepub-0.1.jsonld",
+        {
+            "@language": "und"
+        }
+    ],
+    "alsoKnownAs": [],
+    "attachment": [
+        {
+            "name": "Timezone",
+            "type": "PropertyValue",
+            "value": "UTC+2 (Paris/Berlin)"
+        }
+    ],
+    "capabilities": {
+        "acceptsChatMessages": true
+    },
+    "discoverable": true,
+    "endpoints": {
+        "oauthAuthorizationEndpoint": "https://p.helene.moe/oauth/authorize",
+        "oauthRegistrationEndpoint": "https://p.helene.moe/api/v1/apps",
+        "oauthTokenEndpoint": "https://p.helene.moe/oauth/token",
+        "sharedInbox": "https://p.helene.moe/inbox",
+        "uploadMedia": "https://p.helene.moe/api/ap/upload_media"
+    },
+    "featured": "https://p.helene.moe/users/helene/collections/featured",
+    "followers": "https://p.helene.moe/users/helene/followers",
+    "following": "https://p.helene.moe/users/helene/following",
+    "icon": {
+        "type": "Image",
+        "url": "https://p.helene.moe/media/9a39209daa5a66b7ebb0547b08bf8360aa9d8d65a4ffba2603c6ffbe6aecb432.jpg"
+    },
+    "id": "https://p.helene.moe/users/helene",
+    "inbox": "https://p.helene.moe/users/helene/inbox",
+    "manuallyApprovesFollowers": false,
+    "name": "Hélène",
+    "outbox": "https://p.helene.moe/users/helene/outbox",
+    "preferredUsername": "helene",
+    "publicKey": {
+        "id": "https://p.helene.moe/users/helene#main-key",
+        "owner": "https://p.helene.moe/users/helene",
+        "publicKeyPem": "-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtoSBPU/VS2Kx3f6ap3zv\nZVacJsgUfaoFb3c2ii/FRh9RmRVlarq8sJXcjsQt1e0oxWaWJaIDDwyKZPt6hXae\nrY/AiGGeNu+NA+BtY7l7+9Yu67HUyT62+1qAwYHKBXX3fLOPs/YmQI0Tt0c4wKAG\nKEkiYsRizghgpzUC6jqdKV71DJkUZ8yhckCGb2fLko1ajbWEssdaP51aLsyRMyC2\nuzeWrxtD4O/HG0ea4S6y5X6hnsAHIK4Y3nnyIQ6pn4tOsl3HgqkjXE9MmZSvMCFx\nBq89TfZrVXNa2gSZdZLdbbJstzEScQWNt1p6tA6rM+e4JXYGr+rMdF3G+jV7afI2\nFQIDAQAB\n-----END PUBLIC KEY-----\n\n"
+    },
+    "summary": "I can speak: Français, English, Deutsch (nicht sehr gut), 日本語 (not very well)",
+    "tag": [],
+    "type": "Person",
+    "url": "https://p.helene.moe/users/helene"
+}
\ No newline at end of file
diff --git a/test/fixtures/tesla_mock/mametsuko@mk.absturztau.be.json b/test/fixtures/tesla_mock/mametsuko@mk.absturztau.be.json
new file mode 100644
index 0000000000..d8c13f7752
--- /dev/null
+++ b/test/fixtures/tesla_mock/mametsuko@mk.absturztau.be.json
@@ -0,0 +1,65 @@
+{
+    "@context": [
+        "https://www.w3.org/ns/activitystreams",
+        "https://w3id.org/security/v1",
+        {
+            "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+            "sensitive": "as:sensitive",
+            "Hashtag": "as:Hashtag",
+            "quoteUrl": "as:quoteUrl",
+            "toot": "http://joinmastodon.org/ns#",
+            "Emoji": "toot:Emoji",
+            "featured": "toot:featured",
+            "discoverable": "toot:discoverable",
+            "schema": "http://schema.org#",
+            "PropertyValue": "schema:PropertyValue",
+            "value": "schema:value",
+            "misskey": "https://misskey-hub.net/ns#",
+            "_misskey_content": "misskey:_misskey_content",
+            "_misskey_quote": "misskey:_misskey_quote",
+            "_misskey_reaction": "misskey:_misskey_reaction",
+            "_misskey_votes": "misskey:_misskey_votes",
+            "_misskey_talk": "misskey:_misskey_talk",
+            "isCat": "misskey:isCat",
+            "vcard": "http://www.w3.org/2006/vcard/ns#"
+        }
+    ],
+    "type": "Person",
+    "id": "https://mk.absturztau.be/users/8ozbzjs3o8",
+    "inbox": "https://mk.absturztau.be/users/8ozbzjs3o8/inbox",
+    "outbox": "https://mk.absturztau.be/users/8ozbzjs3o8/outbox",
+    "followers": "https://mk.absturztau.be/users/8ozbzjs3o8/followers",
+    "following": "https://mk.absturztau.be/users/8ozbzjs3o8/following",
+    "featured": "https://mk.absturztau.be/users/8ozbzjs3o8/collections/featured",
+    "sharedInbox": "https://mk.absturztau.be/inbox",
+    "endpoints": {
+        "sharedInbox": "https://mk.absturztau.be/inbox"
+    },
+    "url": "https://mk.absturztau.be/@mametsuko",
+    "preferredUsername": "mametsuko",
+    "name": "mametschko",
+    "summary": "<p><span>nya, ich bin eine Brotperson</span></p>",
+    "icon": {
+        "type": "Image",
+        "url": "https://mk.absturztau.be/files/webpublic-3b5594f4-fa52-4548-b4e3-c379ae2143ed",
+        "sensitive": false,
+        "name": null
+    },
+    "image": {
+        "type": "Image",
+        "url": "https://mk.absturztau.be/files/webpublic-0d03b03d-b14b-4916-ac3d-8a137118ec84",
+        "sensitive": false,
+        "name": null
+    },
+    "tag": [],
+    "manuallyApprovesFollowers": true,
+    "discoverable": false,
+    "publicKey": {
+        "id": "https://mk.absturztau.be/users/8ozbzjs3o8#main-key",
+        "type": "Key",
+        "owner": "https://mk.absturztau.be/users/8ozbzjs3o8",
+        "publicKeyPem": "-----BEGIN PUBLIC KEY-----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\nZK1YlAERG2XFO6br8omhcmECAwEAAQ==\n-----END PUBLIC KEY-----\n"
+    },
+    "isCat": true,
+    "vcard:Address": "Vienna, Austria"
+}
\ No newline at end of file
diff --git a/test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg-activity.json b/test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg-activity.json
new file mode 100644
index 0000000000..b45ab78e4a
--- /dev/null
+++ b/test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg-activity.json
@@ -0,0 +1 @@
+{"@context":["https://www.w3.org/ns/activitystreams","https://w3id.org/security/v1",{"manuallyApprovesFollowers":"as:manuallyApprovesFollowers","sensitive":"as:sensitive","Hashtag":"as:Hashtag","quoteUrl":"as:quoteUrl","toot":"http://joinmastodon.org/ns#","Emoji":"toot:Emoji","featured":"toot:featured","discoverable":"toot:discoverable","schema":"http://schema.org#","PropertyValue":"schema:PropertyValue","value":"schema:value","misskey":"https://misskey-hub.net/ns#","_misskey_content":"misskey:_misskey_content","_misskey_quote":"misskey:_misskey_quote","_misskey_reaction":"misskey:_misskey_reaction","_misskey_votes":"misskey:_misskey_votes","_misskey_talk":"misskey:_misskey_talk","isCat":"misskey:isCat","vcard":"http://www.w3.org/2006/vcard/ns#"}],"id":"https://mk.absturztau.be/notes/93e7nm8wqg/activity","actor":"https://mk.absturztau.be/users/8ozbzjs3o8","type":"Create","published":"2022-08-01T11:06:49.568Z","object":{"id":"https://mk.absturztau.be/notes/93e7nm8wqg","type":"Note","attributedTo":"https://mk.absturztau.be/users/8ozbzjs3o8","summary":null,"content":"<p><span>meow</span></p>","_misskey_content":"meow","published":"2022-08-01T11:06:49.568Z","to":["https://www.w3.org/ns/activitystreams#Public"],"cc":["https://mk.absturztau.be/users/8ozbzjs3o8/followers"],"inReplyTo":null,"attachment":[],"sensitive":false,"tag":[]},"to":["https://www.w3.org/ns/activitystreams#Public"],"cc":["https://mk.absturztau.be/users/8ozbzjs3o8/followers"]}
\ No newline at end of file
diff --git a/test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg.json b/test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg.json
new file mode 100644
index 0000000000..1b931a9a49
--- /dev/null
+++ b/test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg.json
@@ -0,0 +1,44 @@
+{
+    "@context": [
+        "https://www.w3.org/ns/activitystreams",
+        "https://w3id.org/security/v1",
+        {
+            "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+            "sensitive": "as:sensitive",
+            "Hashtag": "as:Hashtag",
+            "quoteUrl": "as:quoteUrl",
+            "toot": "http://joinmastodon.org/ns#",
+            "Emoji": "toot:Emoji",
+            "featured": "toot:featured",
+            "discoverable": "toot:discoverable",
+            "schema": "http://schema.org#",
+            "PropertyValue": "schema:PropertyValue",
+            "value": "schema:value",
+            "misskey": "https://misskey-hub.net/ns#",
+            "_misskey_content": "misskey:_misskey_content",
+            "_misskey_quote": "misskey:_misskey_quote",
+            "_misskey_reaction": "misskey:_misskey_reaction",
+            "_misskey_votes": "misskey:_misskey_votes",
+            "_misskey_talk": "misskey:_misskey_talk",
+            "isCat": "misskey:isCat",
+            "vcard": "http://www.w3.org/2006/vcard/ns#"
+        }
+    ],
+    "id": "https://mk.absturztau.be/notes/93e7nm8wqg",
+    "type": "Note",
+    "attributedTo": "https://mk.absturztau.be/users/8ozbzjs3o8",
+    "summary": null,
+    "content": "<p><span>meow</span></p>",
+    "_misskey_content": "meow",
+    "published": "2022-08-01T11:06:49.568Z",
+    "to": [
+        "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "cc": [
+        "https://mk.absturztau.be/users/8ozbzjs3o8/followers"
+    ],
+    "inReplyTo": null,
+    "attachment": [],
+    "sensitive": false,
+    "tag": []
+}
\ No newline at end of file
diff --git a/test/fixtures/tesla_mock/p.helene.moe-AM7S6vZQmL6pI9TgPY.json b/test/fixtures/tesla_mock/p.helene.moe-AM7S6vZQmL6pI9TgPY.json
new file mode 100644
index 0000000000..a1ef5e20b3
--- /dev/null
+++ b/test/fixtures/tesla_mock/p.helene.moe-AM7S6vZQmL6pI9TgPY.json
@@ -0,0 +1,36 @@
+{
+    "@context": [
+        "https://www.w3.org/ns/activitystreams",
+        "https://p.helene.moe/schemas/litepub-0.1.jsonld",
+        {
+            "@language": "und"
+        }
+    ],
+    "actor": "https://p.helene.moe/users/helene",
+    "attachment": [],
+    "attributedTo": "https://p.helene.moe/users/helene",
+    "cc": [
+        "https://p.helene.moe/users/helene/followers"
+    ],
+    "content": "<span class=\"h-card\"><a class=\"u-url mention\" data-user=\"AHntpQ4T3J4OSnpgMC\" href=\"https://mk.absturztau.be/@mametsuko\" rel=\"ugc\">@<span>mametsuko</span></a></span> meow",
+    "context": "https://p.helene.moe/contexts/cc324643-5583-4c3f-91d2-c6ed37db159d",
+    "conversation": "https://p.helene.moe/contexts/cc324643-5583-4c3f-91d2-c6ed37db159d",
+    "id": "https://p.helene.moe/objects/fd5910ac-d9dc-412e-8d1d-914b203296c4",
+    "inReplyTo": "https://mk.absturztau.be/notes/93e7nm8wqg",
+    "published": "2022-08-02T13:46:58.403996Z",
+    "sensitive": null,
+    "source": "@mametsuko@mk.absturztau.be meow",
+    "summary": "",
+    "tag": [
+        {
+            "href": "https://mk.absturztau.be/users/8ozbzjs3o8",
+            "name": "@mametsuko@mk.absturztau.be",
+            "type": "Mention"
+        }
+    ],
+    "to": [
+        "https://mk.absturztau.be/users/8ozbzjs3o8",
+        "https://www.w3.org/ns/activitystreams#Public"
+    ],
+    "type": "Note"
+}
\ No newline at end of file
diff --git a/test/pleroma/activity/ir/topics_test.exs b/test/pleroma/activity/ir/topics_test.exs
index 311f85dea4..d299fea633 100644
--- a/test/pleroma/activity/ir/topics_test.exs
+++ b/test/pleroma/activity/ir/topics_test.exs
@@ -13,6 +13,29 @@ defmodule Pleroma.Activity.Ir.TopicsTest do
 
   import Mock
 
+  describe "chat message" do
+    test "Create produces no topics" do
+      activity = %Activity{
+        object: %Object{data: %{"type" => "ChatMessage"}},
+        data: %{"type" => "Create"}
+      }
+
+      assert [] == Topics.get_activity_topics(activity)
+    end
+
+    test "Delete produces user and user:pleroma_chat" do
+      activity = %Activity{
+        object: %Object{data: %{"type" => "ChatMessage"}},
+        data: %{"type" => "Delete"}
+      }
+
+      topics = Topics.get_activity_topics(activity)
+      assert [_, _] = topics
+      assert "user" in topics
+      assert "user:pleroma_chat" in topics
+    end
+  end
+
   describe "poll answer" do
     test "produce no topics" do
       activity = %Activity{object: %Object{data: %{"type" => "Answer"}}}
@@ -35,7 +58,7 @@ test "always add user and list topics" do
     setup do
       activity = %Activity{
         object: %Object{data: %{"type" => "Note"}},
-        data: %{"to" => [Pleroma.Constants.as_public()]}
+        data: %{"to" => [Pleroma.Constants.as_public()], "type" => "Create"}
       }
 
       {:ok, activity: activity}
@@ -114,6 +137,55 @@ test "local action doesn't produce public:remote topic", %{activity: activity} d
     end
   end
 
+  describe "public visibility Announces" do
+    setup do
+      activity = %Activity{
+        object: %Object{data: %{"attachment" => []}},
+        data: %{"type" => "Announce", "to" => [Pleroma.Constants.as_public()]}
+      }
+
+      {:ok, activity: activity}
+    end
+
+    test "does not generate public topics", %{activity: activity} do
+      topics = Topics.get_activity_topics(activity)
+
+      refute "public" in topics
+      refute "public:remote" in topics
+      refute "public:local" in topics
+    end
+  end
+
+  describe "local-public visibility create events" do
+    setup do
+      activity = %Activity{
+        object: %Object{data: %{"attachment" => []}},
+        data: %{"type" => "Create", "to" => [Pleroma.Web.ActivityPub.Utils.as_local_public()]}
+      }
+
+      {:ok, activity: activity}
+    end
+
+    test "doesn't produce public topics", %{activity: activity} do
+      topics = Topics.get_activity_topics(activity)
+
+      refute Enum.member?(topics, "public")
+    end
+
+    test "produces public:local topics", %{activity: activity} do
+      topics = Topics.get_activity_topics(activity)
+
+      assert Enum.member?(topics, "public:local")
+    end
+
+    test "with no attachments doesn't produce public:media topics", %{activity: activity} do
+      topics = Topics.get_activity_topics(activity)
+
+      refute Enum.member?(topics, "public:media")
+      refute Enum.member?(topics, "public:local:media")
+    end
+  end
+
   describe "public visibility create events with attachments" do
     setup do
       activity = %Activity{
@@ -152,9 +224,36 @@ test "non-local action produces public:remote:media topic", %{activity: activity
     end
   end
 
+  describe "local-public visibility create events with attachments" do
+    setup do
+      activity = %Activity{
+        object: %Object{data: %{"attachment" => ["foo"]}},
+        data: %{"type" => "Create", "to" => [Pleroma.Web.ActivityPub.Utils.as_local_public()]}
+      }
+
+      {:ok, activity: activity}
+    end
+
+    test "do not produce public:media topics", %{activity: activity} do
+      topics = Topics.get_activity_topics(activity)
+
+      refute Enum.member?(topics, "public:media")
+    end
+
+    test "produces public:local:media topics", %{activity: activity} do
+      topics = Topics.get_activity_topics(activity)
+
+      assert Enum.member?(topics, "public:local:media")
+    end
+  end
+
   describe "non-public visibility" do
     test "produces direct topic" do
-      activity = %Activity{object: %Object{data: %{"type" => "Note"}}, data: %{"to" => []}}
+      activity = %Activity{
+        object: %Object{data: %{"type" => "Note"}},
+        data: %{"to" => [], "type" => "Create"}
+      }
+
       topics = Topics.get_activity_topics(activity)
 
       assert Enum.member?(topics, "direct")
diff --git a/test/pleroma/signature_test.exs b/test/pleroma/signature_test.exs
index 92d05f26cd..b849cbee7f 100644
--- a/test/pleroma/signature_test.exs
+++ b/test/pleroma/signature_test.exs
@@ -109,6 +109,11 @@ test "it properly deduces the actor id for mastodon and pleroma" do
                {:ok, "https://example.com/users/1234"}
     end
 
+    test "it deduces the actor id for gotoSocial" do
+      assert Signature.key_id_to_actor_id("https://example.com/users/1234/main-key") ==
+               {:ok, "https://example.com/users/1234"}
+    end
+
     test "it calls webfinger for 'acct:' accounts" do
       with_mock(Pleroma.Web.WebFinger,
         finger: fn _ -> %{"ap_id" => "https://gensokyo.2hu/users/raymoo"} end
diff --git a/test/pleroma/web/activity_pub/activity_pub_test.exs b/test/pleroma/web/activity_pub/activity_pub_test.exs
index 55063cba49..0c22b5c86d 100644
--- a/test/pleroma/web/activity_pub/activity_pub_test.exs
+++ b/test/pleroma/web/activity_pub/activity_pub_test.exs
@@ -575,7 +575,6 @@ test "inserts a given map into the activity database, giving it an id if it has
       assert activity.data["ok"] == data["ok"]
       assert activity.data["id"] == given_id
       assert activity.data["context"] == "blabla"
-      assert activity.data["context_id"]
     end
 
     test "adds a context when none is there" do
@@ -597,8 +596,6 @@ test "adds a context when none is there" do
 
       assert is_binary(activity.data["context"])
       assert is_binary(object.data["context"])
-      assert activity.data["context_id"]
-      assert object.data["context_id"]
     end
 
     test "adds an id to a given object if it lacks one and is a note and inserts it to the object database" do
@@ -1661,7 +1658,7 @@ test "it can create a Flag activity",
                })
 
       assert Repo.aggregate(Activity, :count, :id) == 1
-      assert Repo.aggregate(Object, :count, :id) == 2
+      assert Repo.aggregate(Object, :count, :id) == 1
       assert Repo.aggregate(Notification, :count, :id) == 0
     end
 
diff --git a/test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs b/test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs
index d7bc8741ab..27d674393b 100644
--- a/test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs
+++ b/test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs
@@ -133,4 +133,17 @@ test "a note with an attachment should work", _ do
 
     %{valid?: true} = ArticleNotePageValidator.cast_and_validate(note)
   end
+
+  test "a Note without replies/first/items validates" do
+    insert(:user, ap_id: "https://mastodon.social/users/emelie")
+
+    note =
+      "test/fixtures/tesla_mock/status.emelie.json"
+      |> File.read!()
+      |> Jason.decode!()
+      |> pop_in(["replies", "first", "items"])
+      |> elem(1)
+
+    %{valid?: true} = ArticleNotePageValidator.cast_and_validate(note)
+  end
 end
diff --git a/test/pleroma/web/activity_pub/object_validators/create_generic_validator_test.exs b/test/pleroma/web/activity_pub/object_validators/create_generic_validator_test.exs
index 0a5b44beb0..e771260c94 100644
--- a/test/pleroma/web/activity_pub/object_validators/create_generic_validator_test.exs
+++ b/test/pleroma/web/activity_pub/object_validators/create_generic_validator_test.exs
@@ -23,10 +23,10 @@ test "a Create/Note from Roadhouse validates" do
     {:ok, object_data} = ObjectValidator.cast_and_apply(note_activity["object"])
     meta = [object_data: ObjectValidator.stringify_keys(object_data)]
 
-    %{valid?: true} = CreateGenericValidator.cast_and_validate(note_activity, meta)
+    assert %{valid?: true} = CreateGenericValidator.cast_and_validate(note_activity, meta)
   end
 
-  test "a Create/Note with mismatched context is invalid" do
+  test "a Create/Note with mismatched context uses the Note's context" do
     user = insert(:user)
 
     note = %{
@@ -54,6 +54,9 @@ test "a Create/Note with mismatched context is invalid" do
     {:ok, object_data} = ObjectValidator.cast_and_apply(note_activity["object"])
     meta = [object_data: ObjectValidator.stringify_keys(object_data)]
 
-    %{valid?: false} = CreateGenericValidator.cast_and_validate(note_activity, meta)
+    validated = CreateGenericValidator.cast_and_validate(note_activity, meta)
+
+    assert validated.valid?
+    assert {:context, note["context"]} in validated.changes
   end
 end
diff --git a/test/pleroma/web/activity_pub/side_effects_test.exs b/test/pleroma/web/activity_pub/side_effects_test.exs
index 9d3490ecde..b24831e854 100644
--- a/test/pleroma/web/activity_pub/side_effects_test.exs
+++ b/test/pleroma/web/activity_pub/side_effects_test.exs
@@ -839,9 +839,7 @@ test "it streams out the announce", %{announce: announce} do
       ]) do
         {:ok, announce, _} = SideEffects.handle(announce)
 
-        assert called(
-                 Pleroma.Web.Streamer.stream(["user", "list", "public", "public:local"], announce)
-               )
+        assert called(Pleroma.Web.Streamer.stream(["user", "list"], announce))
 
         assert called(Pleroma.Web.Push.send(:_))
       end
diff --git a/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
index b00fd919b6..7c406fbd05 100644
--- a/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier/note_handling_test.exs
@@ -707,4 +707,42 @@ test "take_emoji_tags/1" do
              }
            ]
   end
+
+  test "the standalone note uses its own ID when context is missing" do
+    insert(:user, ap_id: "https://mk.absturztau.be/users/8ozbzjs3o8")
+
+    activity =
+      "test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg-activity.json"
+      |> File.read!()
+      |> Jason.decode!()
+
+    {:ok, %Activity{} = modified} = Transmogrifier.handle_incoming(activity)
+    object = Object.normalize(modified, fetch: false)
+
+    assert object.data["context"] == object.data["id"]
+    assert modified.data["context"] == object.data["id"]
+  end
+
+  test "the reply note uses its parent's ID when context is missing and reply is unreachable" do
+    insert(:user, ap_id: "https://mk.absturztau.be/users/8ozbzjs3o8")
+
+    activity =
+      "test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg-activity.json"
+      |> File.read!()
+      |> Jason.decode!()
+
+    object =
+      activity["object"]
+      |> Map.put("inReplyTo", "https://404.site/object/went-to-buy-milk")
+
+    activity =
+      activity
+      |> Map.put("object", object)
+
+    {:ok, %Activity{} = modified} = Transmogrifier.handle_incoming(activity)
+    object = Object.normalize(modified, fetch: false)
+
+    assert object.data["context"] == object.data["inReplyTo"]
+    assert modified.data["context"] == object.data["inReplyTo"]
+  end
 end
diff --git a/test/pleroma/web/activity_pub/transmogrifier/question_handling_test.exs b/test/pleroma/web/activity_pub/transmogrifier/question_handling_test.exs
index 66f8499faf..100210826a 100644
--- a/test/pleroma/web/activity_pub/transmogrifier/question_handling_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier/question_handling_test.exs
@@ -33,8 +33,6 @@ test "Mastodon Question activity" do
     assert object.data["context"] ==
              "tag:mastodon.sdf.org,2019-05-10:objectId=15095122:objectType=Conversation"
 
-    assert object.data["context_id"]
-
     assert object.data["anyOf"] == []
 
     assert Enum.sort(object.data["oneOf"]) ==
@@ -68,7 +66,6 @@ test "Mastodon Question activity" do
     reply_object = Object.normalize(reply_activity, fetch: false)
 
     assert reply_object.data["context"] == object.data["context"]
-    assert reply_object.data["context_id"] == object.data["context_id"]
   end
 
   test "Mastodon Question activity with HTML tags in plaintext" do
diff --git a/test/pleroma/web/activity_pub/transmogrifier_test.exs b/test/pleroma/web/activity_pub/transmogrifier_test.exs
index 89bc460799..b030e84dfe 100644
--- a/test/pleroma/web/activity_pub/transmogrifier_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier_test.exs
@@ -130,15 +130,20 @@ test "it accepts quote posts" do
       assert Object.normalize("https://misskey.io/notes/8vs6wxufd0")
     end
 
-    test "a reply with mismatched context is rejected" do
-      insert(:user, ap_id: "https://macgirvin.com/channel/mike")
+    test "it fixes both the Create and object contexts in a reply" do
+      insert(:user, ap_id: "https://mk.absturztau.be/users/8ozbzjs3o8")
+      insert(:user, ap_id: "https://p.helene.moe/users/helene")
 
-      note_activity =
-        "test/fixtures/roadhouse-create-activity.json"
+      create_activity =
+        "test/fixtures/create-pleroma-reply-to-misskey-thread.json"
         |> File.read!()
         |> Jason.decode!()
 
-      assert {:error, _} = Transmogrifier.handle_incoming(note_activity)
+      assert {:ok, %Activity{} = activity} = Transmogrifier.handle_incoming(create_activity)
+
+      object = Object.normalize(activity, fetch: false)
+
+      assert activity.data["context"] == object.data["context"]
     end
   end
 
@@ -249,7 +254,6 @@ test "it strips internal fields" do
       assert is_nil(modified["object"]["like_count"])
       assert is_nil(modified["object"]["announcements"])
       assert is_nil(modified["object"]["announcement_count"])
-      assert is_nil(modified["object"]["context_id"])
       assert is_nil(modified["object"]["generator"])
     end
 
@@ -264,7 +268,6 @@ test "it strips internal fields of article" do
       assert is_nil(modified["object"]["like_count"])
       assert is_nil(modified["object"]["announcements"])
       assert is_nil(modified["object"]["announcement_count"])
-      assert is_nil(modified["object"]["context_id"])
       assert is_nil(modified["object"]["likes"])
     end
 
diff --git a/test/pleroma/web/activity_pub/utils_test.exs b/test/pleroma/web/activity_pub/utils_test.exs
index d9258054b8..2904678c15 100644
--- a/test/pleroma/web/activity_pub/utils_test.exs
+++ b/test/pleroma/web/activity_pub/utils_test.exs
@@ -429,7 +429,6 @@ test "returns map with id and published data" do
       object = Object.normalize(note_activity, fetch: false)
       res = Utils.lazy_put_activity_defaults(%{"context" => object.data["id"]})
       assert res["context"] == object.data["id"]
-      assert res["context_id"] == object.id
       assert res["id"]
       assert res["published"]
     end
@@ -437,7 +436,6 @@ test "returns map with id and published data" do
     test "returns map with fake id and published data" do
       assert %{
                "context" => "pleroma:fakecontext",
-               "context_id" => -1,
                "id" => "pleroma:fakeid",
                "published" => _
              } = Utils.lazy_put_activity_defaults(%{}, true)
@@ -454,13 +452,11 @@ test "returns activity data with object" do
         })
 
       assert res["context"] == object.data["id"]
-      assert res["context_id"] == object.id
       assert res["id"]
       assert res["published"]
       assert res["object"]["id"]
       assert res["object"]["published"]
       assert res["object"]["context"] == object.data["id"]
-      assert res["object"]["context_id"] == object.id
     end
   end
 
diff --git a/test/pleroma/web/common_api/utils_test.exs b/test/pleroma/web/common_api/utils_test.exs
index 5b20199693..b538c59794 100644
--- a/test/pleroma/web/common_api/utils_test.exs
+++ b/test/pleroma/web/common_api/utils_test.exs
@@ -4,7 +4,6 @@
 
 defmodule Pleroma.Web.CommonAPI.UtilsTest do
   alias Pleroma.Builders.UserBuilder
-  alias Pleroma.Object
   alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.CommonAPI.ActivityDraft
   alias Pleroma.Web.CommonAPI.Utils
@@ -273,22 +272,6 @@ test "delegated renderers" do
     end
   end
 
-  describe "context_to_conversation_id" do
-    test "creates a mapping object" do
-      conversation_id = Utils.context_to_conversation_id("random context")
-      object = Object.get_by_ap_id("random context")
-
-      assert conversation_id == object.id
-    end
-
-    test "returns an existing mapping for an existing object" do
-      {:ok, object} = Object.context_mapping("random context") |> Repo.insert()
-      conversation_id = Utils.context_to_conversation_id("random context")
-
-      assert conversation_id == object.id
-    end
-  end
-
   describe "formats date to asctime" do
     test "when date is in ISO 8601 format" do
       date = DateTime.utc_now() |> DateTime.to_iso8601()
@@ -517,17 +500,6 @@ test "returns empty string when date invalid" do
     end
   end
 
-  describe "conversation_id_to_context/1" do
-    test "returns id" do
-      object = insert(:note)
-      assert Utils.conversation_id_to_context(object.id) == object.data["id"]
-    end
-
-    test "returns error if object not found" do
-      assert Utils.conversation_id_to_context("123") == {:error, "No such conversation"}
-    end
-  end
-
   describe "maybe_notify_mentioned_recipients/2" do
     test "returns recipients when activity is not `Create`" do
       activity = insert(:like_activity)
diff --git a/test/pleroma/web/mastodon_api/controllers/status_controller_test.exs b/test/pleroma/web/mastodon_api/controllers/status_controller_test.exs
index ed51f228da..328e54c115 100644
--- a/test/pleroma/web/mastodon_api/controllers/status_controller_test.exs
+++ b/test/pleroma/web/mastodon_api/controllers/status_controller_test.exs
@@ -284,6 +284,7 @@ test "posting a fake status", %{conn: conn} do
         |> Map.put("url", nil)
         |> Map.put("uri", nil)
         |> Map.put("created_at", nil)
+        |> Kernel.put_in(["pleroma", "context"], nil)
         |> Kernel.put_in(["pleroma", "conversation_id"], nil)
 
       fake_conn =
@@ -307,6 +308,7 @@ test "posting a fake status", %{conn: conn} do
         |> Map.put("url", nil)
         |> Map.put("uri", nil)
         |> Map.put("created_at", nil)
+        |> Kernel.put_in(["pleroma", "context"], nil)
         |> Kernel.put_in(["pleroma", "conversation_id"], nil)
 
       assert real_status == fake_status
diff --git a/test/pleroma/web/mastodon_api/views/status_view_test.exs b/test/pleroma/web/mastodon_api/views/status_view_test.exs
index e48f198138..8dbb033859 100644
--- a/test/pleroma/web/mastodon_api/views/status_view_test.exs
+++ b/test/pleroma/web/mastodon_api/views/status_view_test.exs
@@ -14,11 +14,12 @@ defmodule Pleroma.Web.MastodonAPI.StatusViewTest do
   alias Pleroma.User
   alias Pleroma.UserRelationship
   alias Pleroma.Web.CommonAPI
-  alias Pleroma.Web.CommonAPI.Utils
   alias Pleroma.Web.MastodonAPI.AccountView
   alias Pleroma.Web.MastodonAPI.StatusView
   alias Pleroma.Web.RichMedia.Parser.Embed
 
+  require Bitwise
+
   import Pleroma.Factory
   import Tesla.Mock
   import OpenApiSpex.TestAssertions
@@ -227,7 +228,7 @@ test "a note activity" do
     object_data = Object.normalize(note, fetch: false).data
     user = User.get_cached_by_ap_id(note.data["actor"])
 
-    convo_id = Utils.context_to_conversation_id(object_data["context"])
+    convo_id = :erlang.crc32(object_data["context"]) |> Bitwise.band(Bitwise.bnot(0x8000_0000))
 
     status = StatusView.render("show.json", %{activity: note})
 
@@ -281,6 +282,7 @@ test "a note activity" do
       pleroma: %{
         local: true,
         conversation_id: convo_id,
+        context: object_data["context"],
         in_reply_to_account_acct: nil,
         quote: nil,
         quote_url: nil,
diff --git a/test/pleroma/web/metadata/providers/twitter_card_test.exs b/test/pleroma/web/metadata/providers/twitter_card_test.exs
index 392496993d..1a0cea9cec 100644
--- a/test/pleroma/web/metadata/providers/twitter_card_test.exs
+++ b/test/pleroma/web/metadata/providers/twitter_card_test.exs
@@ -39,6 +39,7 @@ test "it uses summary twittercard if post has no attachment" do
           "actor" => user.ap_id,
           "tag" => [],
           "id" => "https://pleroma.gov/objects/whatever",
+          "summary" => "",
           "content" => "pleroma in a nutshell"
         }
       })
@@ -54,6 +55,36 @@ test "it uses summary twittercard if post has no attachment" do
            ] == result
   end
 
+  test "it uses summary as description if post has one" do
+    user = insert(:user, name: "Jimmy Hendriks", bio: "born 19 March 1994")
+    {:ok, activity} = CommonAPI.post(user, %{status: "HI"})
+
+    note =
+      insert(:note, %{
+        data: %{
+          "actor" => user.ap_id,
+          "tag" => [],
+          "id" => "https://pleroma.gov/objects/whatever",
+          "summary" => "Public service announcement on caffeine consumption",
+          "content" => "cofe"
+        }
+      })
+
+    result = TwitterCard.build_tags(%{object: note, user: user, activity_id: activity.id})
+
+    assert [
+             {:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
+             {:meta,
+              [
+                property: "twitter:description",
+                content: "Public service announcement on caffeine consumption"
+              ], []},
+             {:meta, [property: "twitter:image", content: "http://localhost:4001/images/avi.png"],
+              []},
+             {:meta, [property: "twitter:card", content: "summary"], []}
+           ] == result
+  end
+
   test "it renders avatar not attachment if post is nsfw and unfurl_nsfw is disabled" do
     clear_config([Pleroma.Web.Metadata, :unfurl_nsfw], false)
     user = insert(:user, name: "Jimmy Hendriks", bio: "born 19 March 1994")
@@ -65,6 +96,7 @@ test "it renders avatar not attachment if post is nsfw and unfurl_nsfw is disabl
           "actor" => user.ap_id,
           "tag" => [],
           "id" => "https://pleroma.gov/objects/whatever",
+          "summary" => "",
           "content" => "pleroma in a nutshell",
           "sensitive" => true,
           "attachment" => [
@@ -109,6 +141,7 @@ test "it renders supported types of attachments and skips unknown types" do
           "actor" => user.ap_id,
           "tag" => [],
           "id" => "https://pleroma.gov/objects/whatever",
+          "summary" => "",
           "content" => "pleroma in a nutshell",
           "attachment" => [
             %{
diff --git a/test/pleroma/web/metadata/utils_test.exs b/test/pleroma/web/metadata/utils_test.exs
index 5f2f4a056f..85ef6033a7 100644
--- a/test/pleroma/web/metadata/utils_test.exs
+++ b/test/pleroma/web/metadata/utils_test.exs
@@ -8,7 +8,7 @@ defmodule Pleroma.Web.Metadata.UtilsTest do
   alias Pleroma.Web.Metadata.Utils
 
   describe "scrub_html_and_truncate/1" do
-    test "it returns text without encode HTML" do
+    test "it returns content text without encode HTML if summary is nil" do
       user = insert(:user)
 
       note =
@@ -16,6 +16,7 @@ test "it returns text without encode HTML" do
           data: %{
             "actor" => user.ap_id,
             "id" => "https://pleroma.gov/objects/whatever",
+            "summary" => nil,
             "content" => "Pleroma's really cool!"
           }
         })
@@ -23,6 +24,39 @@ test "it returns text without encode HTML" do
       assert Utils.scrub_html_and_truncate(note) == "Pleroma's really cool!"
     end
 
+    test "it returns context text without encode HTML if summary is empty" do
+      user = insert(:user)
+
+      note =
+        insert(:note, %{
+          data: %{
+            "actor" => user.ap_id,
+            "id" => "https://pleroma.gov/objects/whatever",
+            "summary" => "",
+            "content" => "Pleroma's really cool!"
+          }
+        })
+
+      assert Utils.scrub_html_and_truncate(note) == "Pleroma's really cool!"
+    end
+
+    test "it returns summary text without encode HTML if summary is filled" do
+      user = insert(:user)
+
+      note =
+        insert(:note, %{
+          data: %{
+            "actor" => user.ap_id,
+            "id" => "https://pleroma.gov/objects/whatever",
+            "summary" => "Public service announcement on caffeine consumption",
+            "content" => "cofe"
+          }
+        })
+
+      assert Utils.scrub_html_and_truncate(note) ==
+               "Public service announcement on caffeine consumption"
+    end
+
     test "it does not return old content after editing" do
       user = insert(:user)
 
diff --git a/test/support/http_request_mock.ex b/test/support/http_request_mock.ex
index 76739d8f63..9ffa9a4218 100644
--- a/test/support/http_request_mock.ex
+++ b/test/support/http_request_mock.ex
@@ -1084,6 +1084,14 @@ def get("http://404.site" <> _, _, _, _) do
      }}
   end
 
+  def get("https://404.site" <> _, _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 404,
+       body: ""
+     }}
+  end
+
   def get(
         "https://zetsubou.xn--q9jyb4c/.well-known/webfinger?resource=acct:lain@zetsubou.xn--q9jyb4c",
         _,
@@ -1428,6 +1436,15 @@ def get("https://friends.grishka.me/posts/54642", _, _, _) do
      }}
   end
 
+  def get("https://mk.absturztau.be/users/8ozbzjs3o8", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/mametsuko@mk.absturztau.be.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
   def get("https://friends.grishka.me/users/1", _, _, _) do
     {:ok,
      %Tesla.Env{
@@ -1437,6 +1454,42 @@ def get("https://friends.grishka.me/users/1", _, _, _) do
      }}
   end
 
+  def get("https://p.helene.moe/users/helene", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/helene@p.helene.moe.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
+  def get("https://mk.absturztau.be/notes/93e7nm8wqg", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
+  def get("https://mk.absturztau.be/notes/93e7nm8wqg/activity", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/mk.absturztau.be-93e7nm8wqg-activity.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
+  def get("https://p.helene.moe/objects/fd5910ac-d9dc-412e-8d1d-914b203296c4", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/p.helene.moe-AM7S6vZQmL6pI9TgPY.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
   def get(url, query, body, headers) do
     {:error,
      "Mock response not implemented for GET #{inspect(url)}, #{query}, #{inspect(body)}, #{inspect(headers)}"}