Curiosity

Custom Chat recipe

Source: 08_CustomChat/ · a drop-in replacement for the workspace's default chat experience.

What it teaches

Calling a custom backend endpoint for PostMessage.
Rendering a custom header with a topic selector beside the assistant-template dropdown.
Showing custom empty-state examples that pre-fill the input box on click.
Adding per-message commands (thumbs up / thumbs down) for assistant replies.

Code shape

var endpoints = new CustomChatView
{
    Title       = "Recipe Chat",
    PostMessage = PostMessageAsync   // ← the only required override for a basic custom chat
};

_chatView = ChatView(endpoints, state)
              .WithCustomHeader(BuildHeader)
              .WithCustomExamples(BuildExamples)
              .WithMessageCommands(BuildMessageCommands);

Other customization points on CustomChatView:

Property	Use when
`NewChat`	You want to create the chat row yourself (e.g. attach pre-set context).
`ReplaceMessage`	You support message editing and need to re-trigger your own pipeline.
`ListTools`	The chat should show a curated set of tools instead of every one in the workspace.
`ListChats`	You're filtering the chat list (per-user, per-project, archived view).

How the backend call works

private async Task<UID128> PostMessageAsync(CustomChatView.PostMessageRequest request)
{
    // In a real chat you'd call:
    //     return await Mosaik.API.Endpoints.CallAsync<UID128>(
    //         "recipes/chat/post-message",
    //         new RecipeChatRequest { Message = request.Message, Topic = _topic.Value });

    var reply = await RecipeEndpoints.PostChatMessageAsync(new RecipeChatRequest { ... });

    Toast().Information(reply.Reply);
    return UID128.Empty;   // "I handled it myself"
}

RecipeEndpoints.PostChatMessageAsync lives in src/API/Endpoints.cs and currently returns a hard-coded reply. Once you have a real workspace endpoint, uncomment the Mosaik.API.Endpoints.CallAsync<T> line there and delete the canned fallback.

Custom Chat recipe

What it teaches

Code shape

How the backend call works

See also