# Chat Replay

A scripted AI conversation replayed through the REAL streaming pipeline - Poetry::Ui::Chat's deterministic frames arriving as versioned Turbo Stream morphs into MessageScroller: token-paced text, a tool call flipping loading to done, and a human-in-the-loop approval where the pause is a form and the continuation is the stream after your decision. No model, no key, same bytes every run.

## Default

```erb
<%# The replay rig live: completed turns server-rendered, the
    current assistant turn streaming in as versioned Turbo Stream morphs
    from /demos/chat-replay/stream. State is the URL (?s=segment&a=decision)
    - every point is shareable, every stream byte-identical. %>
<div class="w-full max-w-lg">
  <%= poetry_message_scroller(id: "chat-replay-scroller", class: "h-96 rounded-lg border pt-4") do %>
    <% ChatReplay.segments.first(@replay_cursor).each do |seg| %>
      <% if seg.kind == :user %>
        <%= poetry_message_scroller_item(id: "row-#{seg.id}", anchor: true, class: "px-4") do %>
          <%= poetry_message(align: :end) do |message| %>
            <%= poetry_bubble { seg.text } %>
          <% end %>
        <% end %>
      <% else %>
        <%= poetry_message_scroller_item(id: "item-#{seg.id}", class: "px-4") do %>
          <%= render "chat_replay/row", seg_id: seg.id,
                     parts: seg.final_parts(approved: @replay_decision.nil? ? true : @replay_decision),
                     version: 9999 %>
        <% end %>
      <% end %>
    <% end %>

    <% current = ChatReplay.segments[@replay_cursor] %>
    <% if current&.kind == :assistant %>
      <%= poetry_message_scroller_item(id: "item-#{current.id}", class: "px-4") do %>
        <% if @replay_decision.nil? %>
          <%= render "chat_replay/row", seg_id: current.id, parts: [], version: 0 %>
        <% else %>
          <%# Continuation: start from the paused state; the stream takes over. %>
          <%= render "chat_replay/row", seg_id: current.id,
                     parts: current.frames.last.parts, version: current.frames.last.version %>
        <% end %>
      <% end %>
      <% stream_src = chat_replay_stream_path(s: @replay_cursor, a: params[:a].presence,
                                              instant: params[:instant].presence, page: request.path) %>
      <turbo-stream-source id="chat-replay-source" src="<%= stream_src %>"></turbo-stream-source>
    <% end %>

    <div id="chat-replay-next" class="px-4 pb-4 text-xs text-muted-foreground">streaming…</div>
  <% end %>
</div>
```