Enable chat for artists

ARCHITECTURE.md

@@ -117,7 +117,9 @@ Last.fm schemas (separate, not Ecto-persisted to main DB):
 | `Assets.Image` / `Assets.Transform` | Image processing via Vix (libvips) |
 | `Colors.ColorFrequencyExtractor` | Color extraction via pixel sampling/histogram |
 | `Colors.EdgeWeightedExtractor` | Color extraction weighted by Sobel edge detection |
-| `RecordChat` | OpenAI-powered streaming chat about a record (web search enabled) |
+| `Chat` | Behaviour for streaming AI chat (`stream_response/3` callback) |
+| `RecordChat` | Chat implementation for records (OpenAI streaming, web search enabled) |
+| `ArtistChat` | Chat implementation for artists (OpenAI streaming, uses Wikipedia/artist context) |
 | `FormatNumber` | Number formatting utility |
 
 ---
@@ -240,7 +242,7 @@ All authenticated routes live inside a single `live_session` with three `on_moun
 | `StatsLive.TopAlbums` | StatsLive.Index | Top albums by period (assign_async) |
 | `StatsLive.TopArtists` | StatsLive.Index | Top artists by period (assign_async) |
 | `UniversalSearchLive.Index` | Layout (global) | Cmd+K search modal |
-| `RecordChat` | CollectionLive.Show, WishlistLive.Show | AI chat sheet for a record (OpenAI streaming) |
+| `Chat` | CollectionLive.Show, WishlistLive.Show, ArtistLive.Show | AI chat sheet (OpenAI streaming, configurable per entity) |
 
 ### Shared Component Modules (lib/music_library_web/components/)
 
@@ -257,7 +259,7 @@ All authenticated routes live inside a single `live_session` with three `on_moun
 | `BarcodeScanner` | Barcode scanning UI (uses barcode-detector JS) |
 | `Release` | MusicBrainz release display |
 | `Notes` | Markdown note rendering |
-| `RecordChat` | AI record chat sheet with streaming responses |
+| `Chat` | AI chat sheet with streaming responses (generic, used for records and artists) |
 | `Markdown` | Markdown-to-HTML conversion with `[[double bracket]]` link syntax |
 | `Duration` | Milliseconds to human-readable duration formatting |
 
@@ -288,7 +290,7 @@ All authenticated routes live inside a single `live_session` with three `on_moun
 | `UniversalSearchNavigation` | External | Keyboard navigation in search modal (via `create-navigation-hook` factory) |
 | `RecordPickerNavigation` | External | Keyboard navigation in record picker (via `create-navigation-hook` factory) |
 | `SortableList` | External (`assets/js/hooks/`) | Drag-and-drop reordering of record set items (uses sortablejs) |
-| Various `.ColocatedHooks` | Colocated (in .heex) | Inline hooks prefixed with `.` (includes `.ScrollBottom` for RecordChat) |
+| Various `.ColocatedHooks` | Colocated (in .heex) | Inline hooks prefixed with `.` (includes `.ScrollBottom` for Chat) |
 
 ### JS Event Listeners (app.js)
 

lib/music_library/artist_chat.ex

@@ -0,0 +1,44 @@
+defmodule MusicLibrary.ArtistChat do
+  @behaviour MusicLibrary.Chat
+
+  alias MusicLibrary.Artists.ArtistInfo
+
+  @impl true
+  def stream_response(messages, {artist, artist_info}, callback) do
+    instructions = build_instructions(artist, artist_info)
+
+    OpenAI.chat_stream(messages, on_chunk: callback, instructions: instructions)
+  end
+
+  defp build_instructions(artist, artist_info) do
+    context = build_context(artist, artist_info)
+
+    """
+    You are a knowledgeable music assistant. Answer questions about the artist \
+    the user is currently viewing. Use the provided artist information as your \
+    primary reference, and use web search to find additional up-to-date \
+    information when helpful. Be concise and accurate. When unsure, say so.
+
+    Artist information:
+    #{context}
+    """
+  end
+
+  defp build_context(artist, artist_info) do
+    country = ArtistInfo.country(artist_info)
+    description = ArtistInfo.wikipedia_description(artist_info)
+    summary = ArtistInfo.wikipedia_summary(artist_info)
+
+    parts =
+      [
+        {"Name", artist.name},
+        {"Country", country.name},
+        {"Description", description},
+        {"Biography", summary}
+      ]
+      |> Enum.reject(fn {_label, value} -> value in [nil, ""] end)
+      |> Enum.map_join("\n", fn {label, value} -> "#{label}: #{value}" end)
+
+    parts
+  end
+end

lib/music_library/chat.ex

@@ -0,0 +1,7 @@
+defmodule MusicLibrary.Chat do
+  @callback stream_response(
+              messages :: list(map()),
+              context :: term(),
+              callback :: (String.t() -> any())
+            ) :: :ok | {:error, term()}
+end

lib/music_library/record_chat.ex

@@ -1,7 +1,10 @@
 defmodule MusicLibrary.RecordChat do
+  @behaviour MusicLibrary.Chat
+
   alias MusicLibrary.Records.Record
 
-  def stream_response(messages, record, embedding_text, callback) do
+  @impl true
+  def stream_response(messages, {record, embedding_text}, callback) do
     instructions = build_instructions(record, embedding_text)
 
     OpenAI.chat_stream(messages, on_chunk: callback, instructions: instructions)

lib/music_library_web/components/chat.ex

@@ -1,9 +1,8 @@
-defmodule MusicLibraryWeb.Components.RecordChat do
+defmodule MusicLibraryWeb.Components.Chat do
   use MusicLibraryWeb, :live_component
 
   require Logger
 
-  alias MusicLibrary.RecordChat
   alias MusicLibraryWeb.Markdown
 
   def open(id), do: Fluxon.open_dialog(id)
@@ -55,7 +54,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
       >
         <div class="flex items-center gap-2 pb-4 border-b border-zinc-200 dark:border-zinc-700">
           <h2 class="text-lg font-semibold text-zinc-900 dark:text-zinc-100">
-            {gettext("Chat about %{title}", title: @record.title)}
+            {gettext("Chat about %{title}", title: @title)}
           </h2>
           <.button
             :if={@messages != []}
@@ -82,10 +81,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
               name="hero-chat-bubble-left-right"
               class="size-12 mb-4 text-zinc-300 dark:text-zinc-600"
             />
-            <p class="text-sm font-medium">{gettext("Ask anything about this album")}</p>
+            <p class="text-sm font-medium">{@empty_prompt}</p>
-            <p class="text-xs mt-1">
-              {gettext("e.g. \"What genre is this?\", \"Tell me about the artists\"")}
-            </p>
           </div>
 
           <div
@@ -144,7 +140,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
             <.input
               name="message"
               value=""
-              placeholder={gettext("Ask about this album...")}
+              placeholder={@placeholder}
               class="flex-1"
               disabled={@loading}
               autocomplete="off"
@@ -215,11 +211,11 @@ defmodule MusicLibraryWeb.Components.RecordChat do
     user_message = %{role: "user", content: String.trim(text)}
 
     messages = socket.assigns.messages ++ [user_message]
-    record = socket.assigns.record
+    chat_module = socket.assigns.chat_module
-    embedding_text = socket.assigns.embedding_text
+    chat_context = socket.assigns.chat_context
 
     Task.Supervisor.start_child(MusicLibrary.TaskSupervisor, fn ->
-      case RecordChat.stream_response(messages, record, embedding_text, fn chunk ->
+      case chat_module.stream_response(messages, chat_context, fn chunk ->
              Phoenix.LiveView.send_update(parent_pid, __MODULE__,
                id: component_id,
                chunk: chunk
@@ -232,7 +228,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
           )
 
         {:error, reason} ->
-          Logger.error("RecordChat streaming error: #{reason}")
+          Logger.error("Chat streaming error: #{reason}")
 
           Phoenix.LiveView.send_update(parent_pid, __MODULE__,
             id: component_id,

lib/music_library_web/live/artist_live/show.html.heex

@@ -21,6 +21,18 @@
                 data-slot="icon"
               />
             </.button>
+            <.button
+              variant="soft"
+              phx-click={MusicLibraryWeb.Components.Chat.open("artist-chat-sheet")}
+            >
+              <span class="sr-only">{gettext("Chat about artist")}</span>
+              <.icon
+                name="hero-chat-bubble-left-right"
+                class="h-5 w-5"
+                aria-hidden="true"
+                data-slot="icon"
+              />
+            </.button>
             <.dropdown id={"actions-#{@artist.musicbrainz_id}"} placement="bottom-end">
               <:toggle>
                 <.button variant="soft">
@@ -332,6 +344,17 @@
     musicbrainz_id={@artist.musicbrainz_id}
   />
 
+  <.live_component
+    id="artist-chat"
+    sheet_id="artist-chat-sheet"
+    module={MusicLibraryWeb.Components.Chat}
+    title={@artist.name}
+    chat_module={MusicLibrary.ArtistChat}
+    chat_context={{@artist, @artist_info}}
+    placeholder={gettext("Ask about this artist...")}
+    empty_prompt={gettext("Ask anything about this artist")}
+  />
+
   <.structured_modal
     :if={@live_action == :edit}
     id="artist-info-modal"

lib/music_library_web/live/collection_live/show.html.heex

@@ -28,7 +28,7 @@
             </.button>
             <.button
               variant="soft"
-              phx-click={MusicLibraryWeb.Components.RecordChat.open("record-chat-sheet")}
+              phx-click={MusicLibraryWeb.Components.Chat.open("record-chat-sheet")}
             >
               <span class="sr-only">{gettext("Chat about album")}</span>
               <.icon
@@ -342,9 +342,12 @@
   <.live_component
     id="record-chat"
     sheet_id="record-chat-sheet"
-    module={MusicLibraryWeb.Components.RecordChat}
+    module={MusicLibraryWeb.Components.Chat}
-    record={@record}
+    title={@record.title}
-    embedding_text={@embedding_text}
+    chat_module={MusicLibrary.RecordChat}
+    chat_context={{@record, @embedding_text}}
+    placeholder={gettext("Ask about this album...")}
+    empty_prompt={gettext("Ask anything about this album")}
   />
 
   <.structured_modal

lib/music_library_web/live/wishlist_live/show.html.heex

@@ -16,7 +16,7 @@
           <.button_group>
             <.button
               variant="soft"
-              phx-click={MusicLibraryWeb.Components.RecordChat.open("record-chat-sheet")}
+              phx-click={MusicLibraryWeb.Components.Chat.open("record-chat-sheet")}
             >
               <span class="sr-only">{gettext("Chat about album")}</span>
               <.icon
@@ -307,9 +307,12 @@
   <.live_component
     id="record-chat"
     sheet_id="record-chat-sheet"
-    module={MusicLibraryWeb.Components.RecordChat}
+    module={MusicLibraryWeb.Components.Chat}
-    record={@record}
+    title={@record.title}
-    embedding_text={@embedding_text}
+    chat_module={MusicLibrary.RecordChat}
+    chat_context={{@record, @embedding_text}}
+    placeholder={gettext("Ask about this album...")}
+    empty_prompt={gettext("Ask anything about this album")}
   />
 
   <.structured_modal

priv/gettext/default.pot

@@ -1951,7 +1951,7 @@ msgstr ""
 msgid "Record sets"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #: lib/music_library_web/components/release.ex
 #, elixir-autogen, elixir-format
 msgid "Retry"
@@ -1962,17 +1962,19 @@ msgstr ""
 msgid "Based on genres, artists, and musical style"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/live/collection_live/show.html.heex
+#: lib/music_library_web/live/wishlist_live/show.html.heex
 #, elixir-autogen, elixir-format
 msgid "Ask about this album..."
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/live/collection_live/show.html.heex
+#: lib/music_library_web/live/wishlist_live/show.html.heex
 #, elixir-autogen, elixir-format
 msgid "Ask anything about this album"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Chat about %{title}"
 msgstr ""
@@ -1983,27 +1985,37 @@ msgstr ""
 msgid "Chat about album"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Clear chat"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Send message"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Thinking..."
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
-#, elixir-autogen, elixir-format
-msgid "e.g. \"What genre is this?\", \"Tell me about the artists\""
-msgstr ""
-
-#: lib/music_library_web/components/record_chat.ex
 #, elixir-autogen, elixir-format
 msgid "Something went wrong. Please try again."
 msgstr ""
+
+#: lib/music_library_web/live/artist_live/show.html.heex
+#, elixir-autogen, elixir-format
+msgid "Ask about this artist..."
+msgstr ""
+
+#: lib/music_library_web/live/artist_live/show.html.heex
+#, elixir-autogen, elixir-format
+msgid "Ask anything about this artist"
+msgstr ""
+
+#: lib/music_library_web/live/artist_live/show.html.heex
+#, elixir-autogen, elixir-format
+msgid "Chat about artist"
+msgstr ""

priv/gettext/en/LC_MESSAGES/default.po

@@ -1951,7 +1951,7 @@ msgstr ""
 msgid "Record sets"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #: lib/music_library_web/components/release.ex
 #, elixir-autogen, elixir-format
 msgid "Retry"
@@ -1962,17 +1962,19 @@ msgstr ""
 msgid "Based on genres, artists, and musical style"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/live/collection_live/show.html.heex
+#: lib/music_library_web/live/wishlist_live/show.html.heex
 #, elixir-autogen, elixir-format
 msgid "Ask about this album..."
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/live/collection_live/show.html.heex
+#: lib/music_library_web/live/wishlist_live/show.html.heex
 #, elixir-autogen, elixir-format
 msgid "Ask anything about this album"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Chat about %{title}"
 msgstr ""
@@ -1983,27 +1985,37 @@ msgstr ""
 msgid "Chat about album"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Clear chat"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Send message"
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
 #, elixir-autogen, elixir-format
 msgid "Thinking..."
 msgstr ""
 
-#: lib/music_library_web/components/record_chat.ex
+#: lib/music_library_web/components/chat.ex
-#, elixir-autogen, elixir-format
-msgid "e.g. \"What genre is this?\", \"Tell me about the artists\""
-msgstr ""
-
-#: lib/music_library_web/components/record_chat.ex
 #, elixir-autogen, elixir-format
 msgid "Something went wrong. Please try again."
 msgstr ""
+
+#: lib/music_library_web/live/artist_live/show.html.heex
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Ask about this artist..."
+msgstr ""
+
+#: lib/music_library_web/live/artist_live/show.html.heex
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Ask anything about this artist"
+msgstr ""
+
+#: lib/music_library_web/live/artist_live/show.html.heex
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Chat about artist"
+msgstr ""