High-Performance Open-Source Archive
<script> tags are generally not supported inside a
React runtime). If you encounter issues, please let us
know.The chat UI now displays model reasoning/thinking content as
collapsible panels above assistant responses. Thinking content streams
in real-time with animated topic labels. This works with providers that
support structured thinking (e.g., Claude’s extended thinking via
ellmer) and with local models that wrap reasoning in
<thinking> tags. (#208)
Added enable_cancel parameter to
chat_ui() to show a stop button that lets users cancel an
in-progress AI response. Press the stop button or hit Escape to cancel.
chat_mod_ui() enables cancellation by default, and
chat_mod_server() handles the cancellation wiring
automatically, using the stream cancellation features introduced in
ellmer v0.4.1. (#221)
Markdown lists where every item is a
<span class="suggestion"> are now rendered as a grid
of clickable suggestion cards. Each suggestion’s text content becomes
both the card label and the value sent on click. To add a short heading
above the body text, set the title attribute on the span —
e.g. <span class="suggestion" title="Heading">Body text shown on the card.</span>.
Only the body text (not the title) is submitted when the card is
clicked. Cards stream in with staggered animations and support keyboard
navigation (arrow keys, Home/End) with roving tabindex. (#219)
Added chat_greeting() for creating welcome messages
that appear when the chat is empty. Greetings can be set statically via
chat_ui(greeting=) or dynamically from the server with
chat_set_greeting(). They are automatically dismissed when
the user sends their first message. A new
greeting_requested input fires when the chat is visible,
empty, and has no greeting, enabling LLM-generated welcome messages.
chat_mod_server(greeting=) accepts a function for
auto-generated greetings. (#217)
Tool result cards now render images and PDFs returned by ellmer
tools. When a tool returns content_image_file(),
content_image_url(), or content_pdf_file(),
the result is displayed as an inline image or a PDF filename badge.
Mixed content lists (e.g.,
list(ContentText("summary"), content_image_file("plot.png")))
are rendered with items interleaved in order. (#225)
Added footer parameter to chat_ui() for
displaying arbitrary HTML content below the chat input. Useful for
disclaimers, attribution, or interactive toolbars. Styled with sensible
defaults and customizable via --shiny-chat-footer-font-size
and --shiny-chat-footer-color CSS custom properties.
(#224)
Tool result cards now support a fullscreen toggle. Set
full_screen = TRUE in the display list (or set
res$full_screen <- NA in a custom
contents_shinychat() method) to add a button that expands
the card to fill the viewport. Press Escape, click the
backdrop, or use the close button to exit fullscreen.
Added footer field to ToolResultDisplay
for displaying custom HTML content below the tool result card body.
(#178)
chat_mod_server() now returns a
set_client(new_client, sync = TRUE) function for swapping
the chat client used by the module at runtime. When
sync = TRUE (the default), the new client inherits the
current conversation’s turns, system prompt, and tools so the
conversation continues seamlessly. If a response is currently streaming,
the swap is deferred until the stream completes. (#227)
chat_mod_server() now returns a status
reactive that reports the current interaction state: "idle"
when no response is in progress, or "streaming" while a
response is actively being received. (#227)
chat_restore() now invisibly returns a cancel
function that tears down all bookmark registrations made by that call.
This is useful when swapping the chat client via
set_client(), which handles the re-registration
automatically. (#227)
Fixed the external link confirmation dialog not rendering in
Safari. The backdrop overlay appeared but the dialog content was
invisible due to a Bootstrap/<dialog> CSS
interaction. (#201, #238)
Fixed pressing Escape to dismiss the external link dialog leaving it in a broken state where subsequent link clicks no longer worked. (#238)
Fixed an issue where user chat messages would display the default assistant icon. (#162)
chat_mod_server() now returns a list of reactives for
last_input and last_turn, as well functions to
update_user_input(), append() and
clear() the chat. (#130, #143, #145)Added chat_restore() which adds Shiny bookmarking
hooks to save and restore the {ellmer} chat client. (#28,
#82)
Added update_chat_user_input() for programmatically
updating the user input of a chat UI element. (#78)
shinychat now shows tool call request and results in the UI, and
the feature is enabled by default in chat_app() and the
chat module (chat_mod_server()). When using
chat_append() with chat_ui(), set
stream = "content" when you call the
$stream_async() method on the ellmer::Chat
client to ensure tool calls are included in the chat stream output.
Learn more in the tool
calling UI article. (#52)
Added chat_append(icon=...) and
chat_ui(icon_assistant=...) for customizing the icon that
appears next to assistant responses. (#88)
chat_app() now correctly restores the chat client
state when refreshing the app, e.g. by reloading the page.
(#71)
External links in chat messages in chat_ui() now
open in a new tab by default, with a confirmation dialog.
(#120)
We consolidated the <shiny-chat-message> and
<shiny-user-message> components into a single
<shiny-chat-message> component with a
data-role attribute to indicate whether it’s an “assistant”
or “user” message. This likely has minimal impact on your apps, other
than custom styles. You should update any
shiny-user-message rules to use
shiny-chat-message[data-role="user"]. (#101)
The chat UI’s send input button is now identified by the class
.shiny-chat-btn-send. (@DeepanshKhurana, #138)
Added new output_markdown_stream() and
markdown_stream() functions to allow for streaming markdown
content to the client. This is useful for showing Generative AI
responses in real-time in a Shiny app, outside of a chat interface.
(#23)
Both chat_ui() and
output_markdown_stream() now support arbitrary Shiny UI
elements inside of messages. This allows for gathering input from the
user (e.g., selectInput()), displaying of rich output
(e.g., {htmlwidgets} like {plotly}), and more.
(#29)
Added a new chat_clear() function to clear the chat
of all messages. (#25)
Added chat_app(), chat_mod_ui() and
chat_mod_server(). chat_app() takes an
{ellmer} chat client and launches a simple Shiny app
interface with the chat. chat_mod_ui() and
chat_mod_server() replicate the interface as a Shiny
module, for easily adding a simple chat interface connected to a
specific {ellmer} chat client. (#36)
The promise returned by chat_append() now resolves
to the content streamed into the chat. (#49)
chat_append(), chat_append_message()
and chat_clear() now all work in Shiny modules without
needing to namespace the id of the Chat component.
(#37)
chat_append() now logs and throws a silent error if
the stream errors for any reason. This prevents the app from crashing if
the stream is interrupted. You can still use
promises::catch() to handle the error in your app code if
desired. (#46)
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