Wire @crema/agent-ui: ToolCallCard + AgentAvatar with activity

The /ai surface now renders agent-ui primitives instead of homegrown
tool/typing widgets:

- AgentAvatar with activity (thinking / working / waiting / speaking /
  idle) replaces TypingIndicator. Pulses while the model is generating,
  shows "waiting" while a write is held for confirmation, "working" while
  a confirmed write is executing, "speaking" once tokens are streaming.
- ToolCallCard renders each native tool_call with typed status (pending
  / running / success / error). Built from the assistant message's
  toolCalls plus the matching tool result message. Tool messages no
  longer render standalone — absorbed into their parent assistant turn.
- Empty assistant bubbles (no prose, only tool_calls) collapse so the
  ToolCallCards carry the visual weight.

Wiring: add @crema/agent-ui path entry to tsconfig and @source line to
app.css. Sibling lib-agent-ui must be cloned next to arcadia-admin.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/app.css

@@ -17,6 +17,7 @@
 @source "../../lib-search-ui/src";
 @source "../../lib-feedback-ui/src";
 @source "../../lib-auth-ui/src";
+@source "../../lib-agent-ui/src";
 /* CREMA:SOURCES */
 
 @custom-variant dark (&:is(.dark *));

app/routes/ai.tsx

@@ -62,7 +62,13 @@ import { addLibraryItem } from "~/lib/library"
 import { Avatar, AvatarFallback } from "~/components/ui/avatar"
 import { pageTitle } from "~/lib/page-meta"
 import { useArcadiaClient } from "@crema/arcadia-client"
-import type { ToolCall } from "@crema/llm-ui"
+import type { Message as LLMMessage, ToolCall } from "@crema/llm-ui"
+import {
+  AgentAvatar,
+  ToolCallCard,
+  type ToolCall as AgentToolCall,
+  type ToolCallStatus,
+} from "@crema/agent-ui"
 import {
   buildDenialMessages,
   classifyCalls,
@@ -523,30 +529,60 @@ function ChatSurface({
       ) : (
         <div className="flex-1 px-4 py-6 sm:px-6">
           <div className="mx-auto flex w-full max-w-3xl flex-col gap-6">
-            {messages
+            {messages.map((m, i) => {
-              .filter((m) => m.role !== "system")
+              if (m.role === "system" || m.role === "tool") return null
-              .map((m, i) => (
+              const calls =
+                m.role === "assistant" && m.toolCalls
+                  ? m.toolCalls.map((tc) =>
+                      buildAgentToolCall(tc, messages, isStreaming, !!pendingConfirm),
+                    )
+                  : []
+              const isWritePending =
+                pendingConfirm?.afterIndex === i ? pendingConfirm.writes : null
+              return (
                 <div key={i} className="contents">
                   <MessageRow
-                    role={m.role as "user" | "assistant" | "tool"}
+                    role={m.role as "user" | "assistant"}
                     content={m.content}
                     toolCalls={m.toolCalls}
                   />
-                  {pendingConfirm?.afterIndex === i && (
+                  {calls.length > 0 && (
+                    <div className="self-start flex w-full max-w-[80ch] flex-col gap-2">
+                      {calls.map((c) => (
+                        <ToolCallCard key={c.id} call={c} defaultExpanded={c.status !== "success"} />
+                      ))}
+                    </div>
+                  )}
+                  {isWritePending && (
                     <ConfirmCard
-                      calls={pendingConfirm.writes}
+                      calls={isWritePending}
                       onConfirm={onConfirmWrites}
                       onDeny={onDenyWrites}
                       busy={confirmBusy}
                     />
                   )}
                 </div>
-              ))}
+              )
-            {isStreaming && messages.at(-1)?.role !== "assistant" && (
+            })}
+            {(() => {
+              const activity = deriveAgentActivity({
+                isStreaming,
+                lastMessage: messages.at(-1),
+                pendingConfirm: !!pendingConfirm,
+                confirmBusy,
+              })
+              if (activity === "idle") return null
+              return (
                 <div className="self-start">
-                <TypingIndicator />
+                  <AgentAvatar
+                    name={activeAgent?.name ?? "Atlas"}
+                    activity={activity}
+                    initials={activeAgent ? agentInitials(activeAgent.name) : "AT"}
+                    showLabel
+                  />
                 </div>
-            )}
+              )
+            })()}
             <div
               ref={endRef}
               aria-hidden="true"
@@ -609,22 +645,82 @@ function ChatSurface({
   )
 }
 
+function deriveAgentActivity({
+  isStreaming,
+  lastMessage,
+  pendingConfirm,
+  confirmBusy,
+}: {
+  isStreaming: boolean
+  lastMessage: LLMMessage | undefined
+  pendingConfirm: boolean
+  confirmBusy: boolean
+}): "idle" | "thinking" | "working" | "waiting" | "speaking" {
+  if (confirmBusy) return "working"
+  if (pendingConfirm) return "waiting"
+  if (!isStreaming) return "idle"
+  if (!lastMessage || lastMessage.role !== "assistant") return "thinking"
+  if (lastMessage.content.trim().length > 0) return "speaking"
+  return "thinking"
+}
+
+function buildAgentToolCall(
+  tc: ToolCall,
+  allMessages: LLMMessage[],
+  isStreaming: boolean,
+  pendingConfirm: boolean,
+): AgentToolCall {
+  const result = allMessages.find(
+    (m) => m.role === "tool" && m.toolCallId === tc.id,
+  )
+  let parsedArgs: Record<string, unknown> | undefined
+  try {
+    parsedArgs = tc.arguments ? JSON.parse(tc.arguments) : undefined
+  } catch {
+    parsedArgs = undefined
+  }
+  if (result) {
+    let parsedResult: unknown = result.content
+    let errorMsg: string | undefined
+    try {
+      const obj = JSON.parse(result.content) as Record<string, unknown>
+      if (obj && typeof obj === "object" && typeof obj.error === "string") {
+        errorMsg = obj.error
+      } else {
+        parsedResult = obj
+      }
+    } catch {
+      // leave as raw text
+    }
+    return {
+      id: tc.id,
+      name: tc.name,
+      status: errorMsg ? "error" : "success",
+      args: parsedArgs,
+      result: errorMsg ? undefined : parsedResult,
+      error: errorMsg,
+    }
+  }
+  let status: ToolCallStatus = "running"
+  if (pendingConfirm) status = "pending"
+  else if (!isStreaming) status = "running"
+  return {
+    id: tc.id,
+    name: tc.name,
+    status,
+    args: parsedArgs,
+  }
+}
+
 function MessageRow({
   role,
   content,
   toolCalls,
 }: {
-  role: "user" | "assistant" | "tool"
+  role: "user" | "assistant"
   content: string
   toolCalls?: ToolCall[]
 }) {
-  if (role === "tool") {
-    return (
-      <div className="self-start max-w-[80ch]">
-        <MessageBody content={content} isToolResult />
-      </div>
-    )
-  }
   if (role === "user") {
     return (
       <div className="self-end">
@@ -640,6 +736,9 @@ function MessageRow({
       </div>
     )
   }
+  // Assistant messages with only tool_calls and no prose render nothing here —
+  // the ToolCallCards beneath them carry the visual weight.
+  if (!content.trim()) return null
   return (
     <div className="self-start max-w-[80ch]">
       <MessageBody content={content} toolCalls={toolCalls} />

tsconfig.json

@@ -38,6 +38,8 @@
       "@crema/feedback-ui/*": ["../lib-feedback-ui/src/*"],
       "@crema/auth-ui": ["../lib-auth-ui/src/index.tsx"],
       "@crema/auth-ui/*": ["../lib-auth-ui/src/*"],
+      "@crema/agent-ui": ["../lib-agent-ui/src/index.tsx"],
+      "@crema/agent-ui/*": ["../lib-agent-ui/src/*"],
       "// CREMA:PATHS": [""],
       "react": ["./node_modules/@types/react"],
       "react/*": ["./node_modules/@types/react/*"],