Fix/sdk UI

.husky/pre-commit

@@ -4,12 +4,12 @@
 #
 
 # Add homebrew to PATH for non-interactive shells
-export PATH="/Users/s/Library/pnpm:/opt/homebrew/bin:$PATH"
+export PATH="/opt/homebrew/bin:$HOME/.local/bin:$PATH"
 
 echo "🔍 Running Gitleaks to check for secrets..."
 
 # Check if gitleaks is installed
-if ! command -v gitleaks &> /dev/null; then
+if ! command -v gitleaks > /dev/null 2>&1; then
     echo ""
     echo "❌ ERROR: Gitleaks is not installed!"
     echo ""

packages/copilot-sdk/package.json

@@ -108,6 +108,7 @@
     "@radix-ui/react-slot": "^1.2.4",
     "@radix-ui/react-tooltip": "^1.2.8",
     "@streamdown/code": "^1.0.1",
+    "@streamdown/math": "^1.0.2",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.0",
     "html-to-image": "^1.11.13",

packages/copilot-sdk/src/chat/AbstractAgentLoop.ts

@@ -272,8 +272,10 @@ export class AbstractAgentLoop implements AgentLoopActions {
     }
 
     // Create new abort controller for this batch
+    // Do NOT reset _isCancelled here — if stop() was called between the
+    // iteration check above and this line, we must not wipe that signal.
+    // _isCancelled is only reset in resetIterations() (called by sendMessage).
     this.abortController = new AbortController();
-    this._isCancelled = false;
     this._isProcessing = true;
 
     this.setIteration(this._iteration + 1);

packages/copilot-sdk/src/chat/ChatWithTools.ts

@@ -57,6 +57,12 @@ export interface ChatWithToolsConfig {
   yourgptConfig?: YourGPTConfig;
   /** Enable debug logging */
   debug?: boolean;
+  /**
+   * Controls how multi-turn agent responses appear in the UI.
+   * - `'multi-step'` (default) — one bubble per server agent iteration.
+   * - `'single-turn'` — all iterations collapsed into one bubble per user turn.
+   */
+  streamMode?: "multi-step" | "single-turn";
   /** Initial messages */
   initialMessages?: UIMessage[];
   /** Initial tools to register */
@@ -152,6 +158,7 @@ export class ChatWithTools {
       onCreateSession: config.onCreateSession,
       yourgptConfig: config.yourgptConfig,
       debug: config.debug,
+      streamMode: config.streamMode,
       initialMessages: config.initialMessages,
       state: config.state,
       transport: config.transport,
@@ -281,6 +288,12 @@ export class ChatWithTools {
         const results = await this.agentLoop.executeToolCalls(toolCallInfos);
         this.debug("Tool results:", results);
 
+        // If stop() was called while tools were executing, don't restart the loop
+        if (this.agentLoop.isCancelled) {
+          this.debug("Skipping continueWithToolResults — loop was cancelled");
+          return;
+        }
+
         // Continue chat with tool results
         if (results.length > 0) {
           const toolResults = results.map((r) => ({