diff --git a/apps/x/apps/renderer/src/App.tsx b/apps/x/apps/renderer/src/App.tsx
index 8292a196..56bdab3f 100644
--- a/apps/x/apps/renderer/src/App.tsx
+++ b/apps/x/apps/renderer/src/App.tsx
@@ -1972,6 +1972,21 @@ function App() {
           break
         }
 
+      case 'tool-output-stream':
+        {
+          if (!isActiveRun) return
+          setConversation(prev => prev.map(item => {
+            if (
+              isToolCall(item)
+              && item.id === event.toolCallId
+            ) {
+              return { ...item, streamingOutput: (item.streamingOutput ?? '') + event.output }
+            }
+            return item
+          }))
+          break
+        }
+
       case 'tool-permission-request': {
         if (!isActiveRun) return
         const key = event.toolCall.toolCallId
@@ -3842,7 +3857,16 @@ function App() {
           />
           <ToolContent>
             <ToolInput input={input} />
-            {output !== null ? (
+            {item.streamingOutput && item.status === 'running' ? (
+              <div className="space-y-2 p-4">
+                <h4 className="font-medium text-muted-foreground text-xs uppercase tracking-wide">
+                  Live Output
+                </h4>
+                <pre className="max-h-80 overflow-auto rounded-md border bg-zinc-950 p-4 font-mono text-xs text-green-400 whitespace-pre-wrap">
+                  {item.streamingOutput}
+                </pre>
+              </div>
+            ) : output !== null ? (
               <ToolOutput output={output} errorText={errorText} />
             ) : null}
           </ToolContent>
diff --git a/apps/x/apps/renderer/src/lib/chat-conversation.ts b/apps/x/apps/renderer/src/lib/chat-conversation.ts
index d92c124d..89cbc2ff 100644
--- a/apps/x/apps/renderer/src/lib/chat-conversation.ts
+++ b/apps/x/apps/renderer/src/lib/chat-conversation.ts
@@ -23,6 +23,7 @@ export interface ToolCall {
   name: string
   input: ToolUIPart['input']
   result?: ToolUIPart['output']
+  streamingOutput?: string
   status: 'pending' | 'running' | 'completed' | 'error'
   timestamp: number
 }
diff --git a/apps/x/packages/core/src/agents/runtime.ts b/apps/x/packages/core/src/agents/runtime.ts
index b597a8d6..f58f658e 100644
--- a/apps/x/packages/core/src/agents/runtime.ts
+++ b/apps/x/packages/core/src/agents/runtime.ts
@@ -161,6 +161,7 @@ export class AgentRuntime implements IAgentRuntime {
                         modelConfigRepo: this.modelConfigRepo,
                         signal,
                         abortRegistry: this.abortRegistry,
+                        bus: this.bus,
                     })) {
                         eventCount++;
                         if (event.type !== "llm-stream-event") {
@@ -822,6 +823,7 @@ export async function* streamAgent({
     modelConfigRepo,
     signal,
     abortRegistry,
+    bus,
 }: {
     state: AgentState,
     idGenerator: IMonotonicallyIncreasingIdGenerator;
@@ -830,6 +832,7 @@ export async function* streamAgent({
     modelConfigRepo: IModelConfigRepo;
     signal: AbortSignal;
     abortRegistry: IAbortRegistry;
+    bus: IBus;
 }): AsyncGenerator<z.infer<typeof RunEvent>, void, unknown> {
     const logger = new PrefixLogger(`run-${runId}-${state.agentName}`);
 
@@ -942,6 +945,7 @@ export async function* streamAgent({
                     modelConfigRepo,
                     signal,
                     abortRegistry,
+                    bus,
                 })) {
                     yield* processEvent({
                         ...event,
@@ -952,7 +956,7 @@ export async function* streamAgent({
                     result = subflowState.finalResponse();
                 }
             } else {
-                result = await execTool(agent.tools![toolCall.toolName], toolCall.arguments, { runId, signal, abortRegistry });
+                result = await execTool(agent.tools![toolCall.toolName], toolCall.arguments, { runId, toolCallId, signal, abortRegistry, publish: (event) => bus.publish(event) });
             }
             const resultPayload = result === undefined ? null : result;
             const resultMsg: z.infer<typeof ToolMessage> = {
diff --git a/apps/x/packages/core/src/application/lib/builtin-tools.ts b/apps/x/packages/core/src/application/lib/builtin-tools.ts
index 069cf7ef..d3b5cb19 100644
--- a/apps/x/packages/core/src/application/lib/builtin-tools.ts
+++ b/apps/x/packages/core/src/application/lib/builtin-tools.ts
@@ -847,6 +847,16 @@ export const BuiltinTools: z.infer<typeof BuiltinToolsSchema> = {
                     const { promise, process: proc } = executeCommandAbortable(command, {
                         cwd: workingDir,
                         signal: ctx.signal,
+                        onData: ctx.publish ? (chunk: string) => {
+                            ctx.publish({
+                                runId: ctx.runId,
+                                type: "tool-output-stream",
+                                toolCallId: ctx.toolCallId,
+                                toolName: "executeCommand",
+                                output: chunk,
+                                subflow: [],
+                            });
+                        } : undefined,
                     });
 
                     // Register process with abort registry for force-kill
diff --git a/apps/x/packages/core/src/application/lib/command-executor.ts b/apps/x/packages/core/src/application/lib/command-executor.ts
index 611bde45..0bfe0cb5 100644
--- a/apps/x/packages/core/src/application/lib/command-executor.ts
+++ b/apps/x/packages/core/src/application/lib/command-executor.ts
@@ -143,6 +143,7 @@ export function executeCommandAbortable(
     timeout?: number;
     maxBuffer?: number;
     signal?: AbortSignal;
+    onData?: (chunk: string) => void;
   }
 ): { promise: Promise<AbortableCommandResult>; process: ChildProcess } {
   // Check if already aborted before spawning
@@ -176,16 +177,20 @@ export function executeCommandAbortable(
 
     // Collect output
     proc.stdout?.on('data', (chunk: Buffer) => {
+      const text = chunk.toString();
       const maxBuffer = options?.maxBuffer || 1024 * 1024;
       if (stdout.length < maxBuffer) {
-        stdout += chunk.toString();
+        stdout += text;
       }
+      options?.onData?.(text);
     });
     proc.stderr?.on('data', (chunk: Buffer) => {
+      const text = chunk.toString();
       const maxBuffer = options?.maxBuffer || 1024 * 1024;
       if (stderr.length < maxBuffer) {
-        stderr += chunk.toString();
+        stderr += text;
       }
+      options?.onData?.(text);
     });
 
     // Abort handler
diff --git a/apps/x/packages/core/src/application/lib/exec-tool.ts b/apps/x/packages/core/src/application/lib/exec-tool.ts
index 09983402..909cae65 100644
--- a/apps/x/packages/core/src/application/lib/exec-tool.ts
+++ b/apps/x/packages/core/src/application/lib/exec-tool.ts
@@ -1,4 +1,5 @@
 import { ToolAttachment } from "@x/shared/dist/agent.js";
+import { RunEvent } from "@x/shared/dist/runs.js";
 import { z } from "zod";
 import { BuiltinTools } from "./builtin-tools.js";
 import { executeTool } from "../../mcp/mcp.js";
@@ -9,8 +10,10 @@ import { IAbortRegistry } from "../../runs/abort-registry.js";
  */
 export interface ToolContext {
     runId: string;
+    toolCallId: string;
     signal: AbortSignal;
     abortRegistry: IAbortRegistry;
+    publish: (event: z.infer<typeof RunEvent>) => Promise<void>;
 }
 
 async function execMcpTool(agentTool: z.infer<typeof ToolAttachment> & { type: "mcp" }, input: Record<string, unknown>): Promise<unknown> {
diff --git a/apps/x/packages/shared/src/runs.ts b/apps/x/packages/shared/src/runs.ts
index 5f52f611..d8f4c3b6 100644
--- a/apps/x/packages/shared/src/runs.ts
+++ b/apps/x/packages/shared/src/runs.ts
@@ -81,6 +81,13 @@ export const RunErrorEvent = BaseRunEvent.extend({
     error: z.string(),
 });
 
+export const ToolOutputStreamEvent = BaseRunEvent.extend({
+    type: z.literal("tool-output-stream"),
+    toolCallId: z.string(),
+    toolName: z.string(),
+    output: z.string(),
+});
+
 export const RunStoppedEvent = BaseRunEvent.extend({
     type: z.literal("run-stopped"),
     reason: z.enum(["user-requested", "force-stopped"]).optional(),
@@ -95,6 +102,7 @@ export const RunEvent = z.union([
     MessageEvent,
     ToolInvocationEvent,
     ToolResultEvent,
+    ToolOutputStreamEvent,
     AskHumanRequestEvent,
     AskHumanResponseEvent,
     ToolPermissionRequestEvent,